UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-K

ýANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the fiscal year ended December 31, 20182021
or
oTRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period fromto
Commission File Number: 001-38035

ProPetro Holding Corp.
(Exact name of registrant as specified in its charter)

Delaware26-3685382
(State or other jurisdiction of

incorporation or organization)
(I.R.S. Employer

Identification No.)
1706 South Midkiff, Bldg. B
Midland, Texas 79701
(Address of principal executive offices)
Registrant’s telephone number, including area code: (432) 688-0012

Securities registered pursuant to Section 12(b) of the Act:
Title of each classTrading Symbol(s)Name of each exchange on which registered
Common Stock ($0.001 par value)PUMPNew York Stock Exchange
Preferred Stock Purchase RightsN/ANew York Stock Exchange
Securities registered pursuant to Section 12(g) of the Act: 
None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.Act.    Yes ý  No ¨
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    Yes  ¨    No  ý
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.     Yes  ý  No ¨
Indicate by check mark whether the registrant has submitted electronically and posted on its corporate web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).     Yes  ý  No ¨
Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405 of this chapter) is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. ý
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and "emerging growth company" in Rule 12b-2 of the Exchange Act.
Large accelerated filer
ý
Accelerated filero
Non-accelerated filer
o(Do not check if a smaller reporting company)
Smaller reporting companyo
Emerging growth companyo
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐
Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  ý
The aggregate market value of the Company’s Common Stock held by nonaffiliates on June 30, 2018,2021, determined using the per share closing price on the New York Stock Exchange Composite tape of $15.68$9.16 on that date, was approximately $838.7approximately $664.5 million.
The number of the registrant’s common shares, par value $0.001 per share, outstanding at February 18, 2019,2022, was 100,257,626.103,706,217.




TABLE OF CONTENTS



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FORWARD‑LOOKING STATEMENTS
This annual reportAnnual Report on Form 10-K (the "Annual Report") contains forward‑looking statements. Statements that are predictive in nature, that depend upon or refer to future events or conditions or that include the words “may,” “could,” “plan,” “project,” “budget,” “predict,” “pursue,” “target,” “seek,” “objective,” “believe,” “expect,” “anticipate,” “intend,” “estimate,”"may," "could," "plan," "project," "budget," "predict," "pursue," "target," "seek," "objective," "believe," "expect," "anticipate," "intend," "estimate," and other expressions that are predictions of, or indicate, future events and trends and that do not relate to historical matters identify forward‑looking statements. Our forward‑looking statements include, among other matters, statements about our business strategy, industry, future profitability, expected capital expenditures and the impact of such expenditures on our performance and capital programs.
A forward‑looking statement may include a statement of the assumptions or bases underlying the forward‑looking statement. We believe that we have chosen these assumptions or bases in good faith and that they are reasonable. You are cautioned not to place undue reliance on any forward‑looking statements. You should also understand that it is not possible to predict or identify all such factors and should not consider the following list to be a complete statement of all potential risks and uncertainties. Factors that could cause our actual results to differ materially from the results contemplated by such forward‑looking statements include:
the severity and duration of world health events, including the coronavirus ("COVID-19") pandemic and the related economic repercussions;
the actions taken by the members of the Organization of the Petroleum Exporting Countries ("OPEC") and Russia (together with OPEC and other allied producing countries, "OPEC+") with respect to oil production levels and announcements of potential changes in such levels, including the ability of the OPEC+ countries to agree on and comply with supply limitations;
actions taken by the Biden Administration, such as executive orders or new regulations, that may negatively impact the future production of oil and natural gas in the United States and may adversely affect our future operations;
the level of production ofand resulting market prices for crude oil, natural gas and other hydrocarbons and the resultant market prices of     crude oil, natural gas, natural gas liquids and other hydrocarbons;
changes in general economic and geopolitical conditions;conditions, including the rate of inflation;
the effects of existing and future laws and governmental regulations (or the interpretation thereof) on us and our customers;
cost increases and supply chain constraints related to our services;
competitive conditions in our industry;
changes in the long‑termlong-term supply of, and demand for, oil and natural gas;
actions taken by our customers, suppliers, competitors and third‑party operators;third-party operators and the possible loss of customers or work to our competitors;
technological changes, including lower emissions oilfield services equipment and similar advancements;
changes in the availability and cost of capital;
our ability to successfully implement our business plan;
large or multiple customer defaults, including defaults resulting from actual or potential insolvencies;
the effects of consolidation on our customers or competitors;
the price and availability of debt and equity financing (including changes in interest rates); for the Company and our customers;
our ability to complete growth projects on time and on budget;
operational challenges relating to the COVID-19 pandemic and efforts to mitigate the spread of the virus, including logistical challenges, protecting the health and well-being of our employees, remote work arrangements, performance of contracts and supply chain disruptions;
changes in our tax status;
regulatory and related policy actions intended by federal, state and/or local governments to reduce fossil fuel use and associated carbon emissions, or to drive the substitution of renewable forms of energy for oil and gas, may over time reduce demand for oil and gas and therefore the demand for our services;
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new or expanded regulations that materially limit our customers’ access to federal and state lands for oil and gas development, thereby reducing demand for our services in the affected areas;
growing demand for electric vehicles that result in reduced demand for gasoline and therefore the demand for our services;
our ability to successfully implement technological changes;developments and enhancements, including our new Tier IV DGB equipment and other lower-emissions equipment we may acquire or that may be sought by our customers;
operating hazards, natural disasters, weather‑relatedweather-related delays, casualty losses and other matters beyond our control;control, which risks may be self-insured, or may not be fully covered under our insurance programs;
acts of terrorism, war or political or civil unrest in the United States or elsewhere;
the effects of existingcurrent and future lawslitigation, including the Logan Lawsuit; and governmental regulations (or
the interpretation thereof);potential impact on our business and stock price of any announcements regarding the Logan Lawsuit.
•    the effects of future litigation.
You should not place undue reliance on our forward‑looking statements. Although forward‑looking statements reflect our good faith beliefs at the time they are made, forward‑looking statements involve known and unknown risks, uncertainties and other factors, including the factors described under “Risk Factors,”"Item 1A. Risk Factors" of this Annual Report, which may cause our actual results, performance or achievements to differ materially from anticipated future results, performance or achievements expressed or implied by such forward‑looking statements. We undertake no obligation to publicly update or revise any forward‑looking statement, whether as a result of new information, future events, changed circumstances or otherwise, unless required by law.
Unless the context indicates otherwise, all references to “we,” “our”"ProPetro Holding Corp.," "the Company," "we," "our" or “us”"us" or like terms refer to ProPetro Holding Corp. and its consolidated subsidiary, ProPetro Services, Inc.


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SUMMARY RISK FACTORS
          Our business is subject to varying degrees of risk and uncertainty. Investors should consider the risks and uncertainties summarized below, as well as the risks and uncertainties discussed in Part I, "Item 1A. Risk Factors" of this Annual Report on Form 10-K. Additional risks not presently known to us or that we currently deem immaterial may also affect us. If any of these risks occur, our business, financial condition or results of operations could be materially and adversely affected.
          Our business is subject to the following principal risks and uncertainties:
Risks Inherent in Our Business and Industry
Our business and financial performance depends on the historically cyclical oil and natural gas industry and particularly on the level of capital spending and exploration and production activity within the United States and in the Permian Basin, and a decline in prices for oil and natural gas may cause fluctuation in operating results or otherwise have an adverse effect on our revenue, cash flows, profitability and growth.
Events outside of our control, including an epidemic or outbreak of an infectious disease, such as COVID-19, may materially adversely affect our business.
The majority of our operations are located in the Permian Basin, making us vulnerable to risks associated with operating in one major geographic area.
Our business may be adversely affected by a deterioration in general economic conditions or a weakening of the broader energy industry.
New technology may cause us to become less competitive.
Our operations require substantial capital and we may be unable to obtain needed capital or financing on satisfactory terms, or at all, which could limit our ability to grow.
Restrictions in our Asset Backed Loan (ABL) Credit Facility (as defined herein) and any future financing agreements may limit our ability to finance future operations or capital needs or capitalize on potential acquisitions and other business opportunities.
We may incur debt and our indebtedness could adversely affect our operations and financial condition.
We may record losses or impairment charges related to goodwill and long-lived assets.
Our operations are subject to unforeseen interruptions and hazards inherent in the oil and natural gas industry, for which we may not be adequately insured and which could cause us to lose customers and substantial revenue.
We may be subject to claims for personal injury and property damage, which could materially adversely affect our financial condition and results of operations.
We are subject to cyber security risks. A cyber incident could occur and result in information theft, data corruption, operational disruption and/or financial loss.
We may grow through acquisitions and our failure to properly plan and manage those acquisitions may adversely affect our performance.
The Logan Lawsuit could have a material adverse effect on our business, financial condition, results of operation, and cash flows.
Risks Related to Customers, Suppliers and Competition
Reliance upon a few large customers may adversely affect our revenue and operating results.
We face significant competition that may cause us to lose market share, and competition in our industry has intensified during the recent industry downturn.
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We are exposed to the credit risk of our customers, and any material nonpayment or nonperformance by our customers could adversely affect our business, results of operations and financial conditions.
Our business depends upon the ability to obtain specialized equipment, parts and key raw materials, including sand and chemicals, from third‑party suppliers, and we may be vulnerable to delayed deliveries and future price increases.
We may be required to pay fees to certain of our sand suppliers based on minimum volumes under long-term contracts regardless of actual volumes received.
Risks Related to Employees
We rely on a few key employees whose absence or loss could adversely affect our business.
If we are unable to employ a sufficient number of skilled and qualified workers, our capacity and profitability could be diminished and our growth potential could be impaired.
Risks Related to Regulatory Matters
We are subject to environmental laws and regulations, and future compliance, claims, and liabilities relating to such matters may have a material adverse effect on our results of operations, financial position or cash flows.
Our and our customers’ operations are subject to a series of risks arising out of the threat of climate change that could result in increased operating costs, limit the areas in which oil and natural gas production may occur, and reduce demand for the products and services we provide.
Federal and state legislative and regulatory initiatives relating to hydraulic fracturing could result in increased costs and additional operating restrictions or delays.
Increasing trucking regulations may increase our costs and negatively impact our results of operations.
Increased attention to environmental, social and governance matters, conservation measures, commercial development and technological advances could reduce demand for oil and natural gas and our services.
Certain of our completion services, particularly our hydraulic fracturing services, are substantially dependent on the availability of water. Restrictions on our or our customers’ ability to obtain water may have an adverse effect on our financial condition, results of operations and cash flows.
Risks Related to our Tax Matters
Our ability to use our net operating loss carryforwards may be limited.
Risks Inherent to an Investment in our Common Stock
We are subject to certain requirements of Section 404 of the Sarbanes-Oxley Act ("Section 404"). If we or our auditors identify and report material weaknesses in internal control over financial reporting, our investors may lose confidence in our reported information and our stock price may be negatively affected.
The market price of our common stock is subject to volatility.
There may be future sales or other dilution of our equity, which may adversely affect the market price of our common stock.
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PART I
Item 1.     Business.
Our Company
We are a growth‑oriented, Midland, Texas‑based oilfield services company providing hydraulic fracturing and other complementary services to leading upstream oil and gas companies engaged in the exploration and production or ("E&P,&P") of North American unconventional oil and natural gas resources. Our operations are primarily focused in the Permian Basin, where we have cultivated longstanding customer relationships with some of the region’s most active and well‑capitalized E&P companies. The Permian Basin is widely regarded as one of the most prolific oil‑producing areaareas in the United States, and we believe we are one of the leading providers of hydraulic fracturing services in the region by hydraulic horsepower or HHP. During the year ended("HHP").
       Our total available HHP at December 31, 2018, we purchased and deployed four newbuild hydraulic fracturing units, bringing our total horse power to 905,0002021 was 1,423,000 HHP, or 20 deployed fleets.
On December 31, 2018, we consummated the purchase of certain pressure pumping assets and real property from Pioneer Natural Resources USA, Inc. (“Pioneer”) and Pioneer Natural Resources Pumping Services, LLC (“Pioneer Pumping Services”). Prior to the purchase, the pressure pumping assets exclusively provided integrated pressure pumping services to Pioneer’s completion and production operations. The acquisition cost of the assetswhich was comprised of $110.0 million of cash and 16.6 million shares90,000 HHP of our common stock.Tier IV Dynamic Gas Blending ("DGB") equipment, 1,225,000 HHP of conventional Tier II equipment and 108,000 HHP of our DuraStim®electric hydraulic fracturing equipment. Our fleet could range from approximately 50,000 to 80,000 HHP depending on the job design and customer demand at the wellsites. With the industry transition to lower emissions equipment and simultaneous hydraulic fracturing ("Simul-Frac"), in addition to several other changes to our customers' job designs, we believe that our available fleet capacity could decline if we decide to reconfigure our fleets to increase active HHP and backup HHP at the wellsites. In connectionSeptember 2021, we placed an order with our equipment manufacturers for 125,000 HHP of Tier IV DGB equipment for additional conversions, which we expect to be delivered at different times through the consummationfirst half of transaction,2022.
          In 2019, we becameentered into a strategic long-term service providerpurchase commitment for 108,000 HHP of DuraStim® electric powered hydraulic fracturing equipment. In addition to Pioneer, providingDuraStim® fleets, we are also evaluating other electric and alternative pressure pumping solutions. In December 2021, we disposed of our two gas turbines initially purchased to provide electrical power to our DuraStim® fleets as we determined they were an inefficient power solution in the field. In the future, we may lease electrical power equipment from a third party or rely on our customers to provide power solutions for our electric equipment.
          Our competitors include many large and relatedsmall oilfield services companies, including Halliburton Company, Liberty Oilfield Services Inc., Nextier Oilfield Solutions Inc., Patterson-UTI Energy Inc., RPC, Inc., FTS International Inc. and a number of private and locally-oriented businesses. The markets in which we operate are highly competitive. To be successful, an oilfield services company must provide services that meet the specific needs of oil and natural gas E&P companies at competitive prices. Competitive factors impacting sales of our services are price, reputation, technical expertise, emissions profile, service and equipment design and quality, and health and safety standards. Although we believe our customers consider all of these factors, we believe price is a key factor in E&P companies' criteria in choosing a service provider. However, we have recently observed the energy industry and our customers shift to lower emissions equipment, which we believe will be an increasingly important factor in an E&P company's selection of a service provider. The transition to lower emissions equipment has been challenging for a termcompanies in the service industry because of upthe capital requirements, and the depressed pricing experienced by the service industry. While we seek to 10 years.price our services competitively, we believe many of our customers elect to work with us based on our operational efficiencies, productivity, equipment quality, reliability, ability to manage multifaceted logistics challenges, commitment to safety and the ability of our people to handle the most complex Permian Basin well completions.
The pressure pumping assets acquired include eight hydraulic fracturing fleets with a total of 510,000 HHP, four coiled tubing units and an associated equipment maintenance facility. Through this acquisition, we expanded our existing          Our substantial market presence in the Permian Basin positions us well to capitalize on drilling and increasedcompletion activity in the region. Primarily, our pumping capacity by 56%, to 28 hydraulic fracturing fleets with a total of 1,415,000 HHP, further strengthening our position as one of the largest pure-play provider of integrated well completion servicesoperational focus has been in the Permian Basin.Basin's Midland sub-basin, where our customers have operated. However, we have recently increased our operations in the Delaware sub-basin and are well-positioned to support further increases to our activity in this area in response to demand from our customers. Over time, we expect the Permian Basin's Midland and Delaware sub-basins to continue to command a disproportionate share of future North American E&P spending.
Through our pressure pumping segment (which also includes our cementing operations), we primarily provide hydraulic fracturing services to E&P companies in the Permian Basin. Our modern hydraulic fracturing fleet has been designed to handle the most challengingoperating conditions commonly utilized in the Permian Basin operating conditions and the region’sregion's increasingly high‑intensityhigh-intensity well completions (including Simul-Frac, which involves fracturing multiple wellbores at the same time), which are characterized by longer horizontal wellbores, more frac stages per lateral and increasing amounts of proppant per well.
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In addition to our core hydraulic fracturingpressure pumping segment operations, which includes our cementing operations, we also offer a suite of complementary well completion and production services, including cementing, coiled tubing flowbackservices. Through our coiled tubing services and drilling. We believe these complementary servicessegment, we seek to create operational efficiencies for our customers, andwhich could allow us to capture a greater portion of their capital spending across the lifecycle of an unconventionala well.
Our primary business objectiveCommodity Price and Other Economic Conditions
         The oil and gas industry has traditionally been volatile and is to serveinfluenced by a combination of long-term, short-term and cyclical trends, including domestic and international supply and demand for oil and gas, current and expected future prices for oil and gas and the perceived stability and sustainability of those prices, and capital investments of E&P companies toward their development and production of oil and gas reserves. The oil and gas industry is also impacted by general domestic and international economic conditions such as a strategic long-term partner to our customers. We achieve this objective by providing reliable, high‑quality servicessupply chain disruptions and inflation, political instability in oil producing countries, government regulations (both in the United States and internationally), levels of consumer demand, adverse weather conditions, and other factors that are tailoredbeyond our control.
         The global public health crisis associated with the COVID-19 pandemic could continue to have an adverse effect on global economic activity for the foreseeable future. Some of the challenges resulting from the COVID-19 pandemic that have impacted our customers’ needsbusiness include restrictions on movement of personnel and synchronizedassociated gatherings, shortage of skilled labor, cost inflation and supply chain disruptions. Additionally, with most of the large, capitalized E&P companies in the United States, including our customers, closely managing their operating budget and exercising capital discipline, we do not currently expect significant increases in crude oil production over the short-to-medium term. Furthermore, OPEC+ has indicated that they will continue with their well development programs. This alignment assistsplans to manage production levels by gradually increasing crude oil output. With the tightness in crude oil production and growing demand for crude oil, there has been a significant increase in rig count and WTI crude oil prices have increased to over $90 per barrel in February 2022 from its lowest point of $20 per barrel in March 2020. The Permian Basin rig count has increased significantly from approximately 179 at the beginning of 2021 to approximately 294 at the end of 2021, according to Baker Hughes. Although crude oil prices are currently at a 7-year high, the oilfield services industry, including the pressure pumping segment, has not fully recovered as evidenced by continued depressed pricing for most of our customers in optimizing the long‑term developmentservices, and shortages of their unconventional resources. Over the past three years, we have leveraged our strong relationshipsskilled labor force in the Permian Basin, coupled with rising inflationary costs. However, we still believe that the Permian Basin, our primary area of operation, will be the most attractive basin to significantly growE&P companies and should command higher prices and associated profitability, if the overall demand for crude oil and our installed HHP capacityservices continues to increase.
Government regulations and organically buildinvestors are demanding the oil and gas industry transition to a lower emissions operating environment, including the upstream and oilfield services companies. As a result, we are working with our cementingcustomers and coiled tubing linesequipment manufacturers to transition to a lower emissions profile. Currently, a number of business. Consistent with past performance,lower emission solutions for pumping equipment, including Tier IV DGB, electric, direct drive gas turbine and other technologies have been developed, and we expect additional lower emission solutions will be developed in the future. We are continually evaluating these technologies and other investment and acquisition opportunities that would support our existing and new customer relationships. The transition to lower emissions equipment is quickly evolving and will be capital intensive. Over time, we may be required to convert substantially all of our conventional Tier II equipment to lower emissions equipment. If we are unable to quickly transition to lower emissions equipment and meet our and our customers’ emissions goals, the demand for our services could be adversely impacted.
          The Permian Basin rig count increase, WTI crude oil price increase and costs inflation could be indicative of an energy market recovery. If the rig count and market conditions continue to improve, including improved customers' pricing and labor availability, and we are able to meet our customers' lower emissions equipment demands, we believe our substantial market presenceoperational and financial results will also continue to yieldimprove. However, if market conditions do not improve, and we are unable to increase our pricing or pass-through future cost increases to our customers, there could be a varietymaterial adverse impact on our business, results of actionable growth opportunities allowing usoperations and cash flows. Refer to expand bothPart II, Item 7, "Management’s Discussion and Analysis of Financial Condition and Results of Operations" for more discussions on our hydraulic fracturingcurrent and complementary services going forward. To this end, we intend to continue to differentiate ourselves, consistent with our past practice, by opportunistically deploying new equipment on a long‑term dedicated basis.future business environment and financial performance.
Our Services
We conducthave historically conducted our business through fivethree operating segments: hydraulic fracturing, (inclusive of acidizing), cementing, coil tubing, flowback and drilling.coiled tubing. For reporting purposes, the hydraulic fracturing and cementing operating segments are aggregated into our one reportable segment: pressure pumping.segment—"Pressure Pumping". Our coiled tubing operating segment and corporate administrative expense are aggregated into our "All Other" segment. For additional financial information on our reportable segment,segments, please see reportable segment information in Part II - Item 8. Financial8, "Financial Statements and Supplementary Data."

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Pressure Pumping
Hydraulic Fracturing
We primarily provide hydraulic fracturing services to E&P companies in the Permian Basin. These services are intended to optimize hydrocarbon flow paths during the completion phase of horizontal shale wellbores. We have significant expertise in multi‑stage fracturing of horizontal oil‑producing wells in unconventional geological formations. During the year endedOur total available HHP at December 31, 2018, we continued to organically grow2021 was 1,423,000 HHP, which was comprised of 90,000 HHP of our Tier IV DGB equipment, 1,225,000 HHP of conventional Tier II equipment and 108,000 HHP of our DuraStim® hydraulic fracturing business to a total of 20equipment. Our DuraStim® hydraulic fracturing fleetsequipment has been tested on a limited scale basis with an aggregate of 905,000 HHP. Following the consummationcertain of our acquisition of pressure pumping assets from Pioneer Pressure Pumping Services,customers and we increased ourare evaluating the appropriate strategy to continue such field testing, including whether field testing will be conducted in 2022.
          The hydraulic fracturing business to a total 28 fleets, or 1,415,000 HHP.
The fracturing process consists of pumping a fracturing fluid into a well at sufficient pressure to fracture the formation. Materials known as proppants, which in our business are comprised primarily of sand, are suspended in the fracturing fluid and are pumped into the fracture to prop it open. The fracturing fluid is designed to “break,”break, or loosen viscosity, and be forced out of the formation by its pressure, leaving the proppants suspended in the fractures created, thereby increasing the mobility of the hydrocarbons. As a result of the fracturing process, production rates are usually enhanced substantially, thus increasing the rate of return of hydrocarbons for the operator.
We own and operate a fleet of mobile hydraulic fracturing units and other auxiliary equipment to perform fracturing services. We also refer to all of our fracturing units, other equipment and vehicles necessary to perform a fracturing job as a “fleet”"fleet" and the personnel assigned to each fleet as a “crew.” Each"crew." On average, one hydraulic fracturing unitfleet consists of approximately 50,000 to 80,000 HHP, depending on job design and customer demand. Our hydraulic fracturing units consist primarily of a high pressure hydraulic pump, diesel or dual gas engine, transmission and various hoses, valves, tanks and other supporting equipment like blenders, irons, hoses and datavans. Our DuraStim® hydraulic fracturing fleet is electrically driven and can be powered by turbines, generators or similar equipment that are typically mountedcan generate electricity. In December 2021, we sold our two turbines for cash consideration of $36.0 million, and the net book value of the turbines prior to a flatbed trailer.the sale was approximately $39.5 million. Our two turbines were initially purchased to provide power to our DuraStim® equipment. In the future, we may lease or purchase alternative power solutions for our electric equipment.
We provide dedicated equipment, personnel and services that are tailored to meet each of our customer’s needs. Each fleet has a designated team of personnel, which allows us to provide responsive and customized services, such as project design, proppant and other consumables procurement, real‑time data provision and post‑completion analysis for each of our jobs. Many of our hydraulic fracturing fleets and associated personnel have worked continuously worked with the same customer for the past several years promoting deep relationships and a high degree of coordination and visibility into future customer activity levels. Furthermore, in light of our substantial market presence and historically high fleet utilization levels, we have established a variety of entrenchedtrusted relationships with key equipment, sand and other downhole consumable suppliers, including over 30 sand suppliers utilized in 2018. Thesesuppliers. We believe these strategic relationships ensure ready accessposition us to acquire equipment, parts and materials on a timely and economic basis and allow our dedicated procurement and logistics team to ensuresupport consistently safe and reliable operations.
Cementing
We provide cementing services for completion of new wells and remedial work on existing wells. Cementing services use pressure pumping equipment to deliver a slurry of liquid cement that is pumped down a well between the casing and the borehole. Cementing provides isolation between fluid zones behind the casing to minimize potential damage to hydrocarbon bearing formations or the integrity of freshwater aquifers, and provides structural integrity for the casing by securing it to the earth. Cementing is also done when recompletingre-completing wells, where one zone is plugged and another is opened.
As of December 31, 2018, we operated a total of 20 cementing units, with 13 units operating in the Permian Basin and 7 units operating in the Uinta‑Piceance Basin.        We believe that our cementing segment provides an organic growth opportunity for us to expand our service offerings within our existing customer base.

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Other Services
Coiled Tubing
Coiled tubing services involve injecting coiled tubing into wells to perform various completion well intervention operations. Coiled tubing is a flexible steel pipe with a diameter of typically less than three inches and manufactured in continuous lengths of thousands of feet. It is wound or coiled on a truck‑mounted reel for onshore applications. Due to its small diameter, coiled tubing can be inserted into existing production tubing and used to perform a variety of services (including drillout of plugs) to enhance the flow of oil or natural gas.
The principal advantages of using coiled tubing include the ability to (i) continue production from the well without interruption, thus reducing the risk of formation damage, (ii) move continuous coiled tubing in and out of a well significantly faster than conventional pipe used with a workover rig, which must be jointed and unjointed, (iii) direct fluids into a wellbore with more precision, allowing for improved stimulation fluid placement, (iv) provide a source of energy to power a downhole motor or manipulate down‑holedownholetools, and (v) enhance access to remote fields due to the smaller size and mobility.
As of December 31, 2018, we had 8 coiled tubing units of various sizes. We believe these units are well suited for the performance requirements of the unconventional resource markets we serve.
Flowback Services
Our flowback services consist of production testing, solids control, hydrostatic testing and torque services. Flowback involves the process of allowing fluids to flow from the well following a treatment, either in preparation for an impending phase of treatment or to return the well to production. Our flowback equipment consists of manifolds, accumulators, valves, flare stacks and other associated equipment that combine to form up to a total of five well‑testing spreads. We provide flowback services in the Permian Basin and mid‑continent markets.
Surface Air Drilling
We operated a surface air drilling operation in the Uinta‑Piceance Basin, which offered pre‑set surface air drilling services to target depths of approximately 4,000 feet in areas of fragile geology. Air drilling is a technique in which oil, natural gas, or geothermal wells are drilled by creating a pressure within the well that is lower than the reservoir pressure, which results in increased rates of penetration, reduced formation damage and reduced drilling costs.
On August 31, 2018, we divested our surface air drilling operations, included in our "all other" operating segment category in our financial statements, in order to continue to position ourselves as a Permian Basin-focused pressure pumping business because we believe the pressure pumping market in the Permian Basin offers more supportive long-term growth fundamentals. The divestiture of our surface air drilling operations did not qualify for presentation and disclosure as discontinued operations, and accordingly we have recorded the resulting loss on disposal of our surface air drilling of $0.3 million, as part of our loss on disposal of asset in our statement of operations included in this annual report. The divestiture of our surface air drilling operations resulted in a reduction in the number of our current operating segments. The change in the number of our operating segments did not impact our reportable segment information reported in the financial statements included in this annual report.
Competitive Strengths
Our primary business objective is to serve as a strategic long-term partner for our customers. We achieve this objective by providing reliable, high‑quality services that are tailored to our customers’ needs and synchronized with their well development programs. This alignment assists our customers in optimizing the long‑term development of their unconventional resources. We believe that the following competitive strengths differentiate us from our peers and uniquely position us to achieve our primary business objective.

Strong market position in the Permian Basin. We believe we are one of the largest hydraulic fracturing provider by HHP in the Permian Basin, which is the most prolific oil producing area in the United States. Our longstanding customer relationships and substantial Permian Basin market presence uniquely position us to continue growing in tandem with the basin’s ongoing development. The Permian Basin is a mature, liquids‑rich basin with well known geology and a large, exploitable resource base that delivers attractive E&P producer economics at or below current commodity prices. As a result of its significant size, coupled with the presence of multiple prospective geologic benches and other favorable characteristics, the Permian Basin has become widely recognized as the most attractive and economic oil resource in North America.
Our operational focus has historically been in the Permian Basin’s Midland sub‑basin in support of our customers’ core operations. More recently, however, many of our customers have made sizeable acquisitions in the Delaware Basin, and we have expanded our services into the Delaware Basin to help develop their acreage. Further, we believe that we are uniquely positioned to capture a large addressable growth opportunity as the basin develops. For the foreseeable future, we expect both the Midland Basin and the Delaware Basin to continue to command a disproportionate share of future North American E&P spending.
Hydraulic fracturing is highly levered to increasing drilling activity and completion intensity levels. The combination of an expanding Permian Basin horizontal rig count and more complex well completions has a compounding effect on HHP demand growth. Horizontal drilling has become the default method for E&P operators to most economically extract unconventional resources, and the number of horizontal rigs has increased from 22% of the total Permian Basin rig count in December 2011 to approximately 91% of the Permian Basin rig count at December 31, 2018. As the horizontal rig count has grown, well completion intensity levels have also increased as a result of longer wellbore lateral lengths, more fracturing stages per foot of lateral and increasing amounts of proppant per stage. Furthermore, the ongoing improvement in drilling and completion efficiencies, driven by innovations such as multi‑well pads and zipper fracs, have further increased the demand for HHP. Taken together, these demand drivers have helped contribute to the full utilization of our fleet and have us well positioned to capture future growth opportunities and enhanced pricing for our services.
Deep relationships and operational alignment with high‑quality, Permian Basin‑focused customers. Our deep local roots, operational expertise and commitment to safe and reliable service have allowed us to cultivate longstanding customer relationships with the most active and well‑capitalized Permian Basin operators. Many of our current customers have worked with us since our inception and have integrated our fleet scheduling with their well development programs. This high degree of operational alignment and their continued support have allowed us to maintain relatively high utilization rates over time. As our customers increase activity levels, we expect to continue to leverage these strong relationships to keep our fleet fully utilized and selectively expand our platform in response to specific customer demand.
Standardized fleet of modern, well‑maintained equipment. We have a large, homogenous fleet of modern equipment that is configured to handle the Permian Basin’s most complex, highest‑intensity, hydraulic fracturing jobs. We believe that our fleet design is a key advantage compared to many of our competitors who have fracturing units that are not optimized for Permian Basin conditions. Our fleet is largely standardized across units to facilitate efficient maintenance and repair, reducing equipment downtime and improving labor efficiency. Furthermore, our strong relationships with a variety of key suppliers and vendors provide us with the reliable access to the equipment necessary to support our continued organic growth strategy.
Proven cross‑cycle financial performance. Over the past several years, we have maintained high cross‑cycle fleet utilization rates. Since September 2016 our fleet has consistently recorded a utilization rate of approximately 100%. Our consistent track record of steady growth, coupled with our ability to quickly deploy new HHP on a dedicated and fully utilized basis, has resulted in revenue growth across the industry’s cycles. We believe that we will be able to continue to grow faster than our competitors while preserving attractive EBITDA margins as a result of our differentiated service offerings and a robust backlog of demand for our services. Furthermore, we believe that our philosophy of maintaining modest

financial leverage and a healthy balance sheet has left us more conservatively capitalized than our peers. We expect that improving market fundamentals, our superior execution and our customer‑focused approach should result in strong financial performance.
Seasoned management and operating team. We have a seasoned executive management team, with our senior members contributing more than 100 years of collective industry and financial experience. Members of our management team founded our business and seeded our company with a portion of our original investment capital. We believe their track record of successfully building premier oilfield service companies in the Permian Basin, as well as their deep roots and relationships throughout the West Texas community, provide a meaningful competitive advantage for our business. In addition, our management team has assembled a loyal group of highly‑motivated and talented managers and field personnel, and we have had minimal manager‑level turnover in our core service divisions over the past three years. We employ a balanced decision‑making structure that empowers managerial and field personnel to work directly with customers to develop solutions while leveraging senior management’s oversight. This collaborative approach fosters strong customer links at all levels of the organization and effectively institutionalizes customer relationships beyond the executive suite.
Strategy
Our strategy is to:
Capture an increasing share of rising demand for hydraulic fracturing services in the Permian Basin. We intend to continue to position ourselves as a Permian Basin‑focused hydraulic fracturing business, as we believe the Permian Basin hydraulic fracturing market offers supportive long‑term growth fundamentals. These fundamentals are characterized by increased demand for our HHP, driven by increasing drilling activity and well completion intensity levels. We are currently operating at approximately 100% utilization, and we believe we are strategically positioned to deploy additional hydraulic fracturing equipment as our customers continue to develop their assets in the Midland Basin and Delaware Basin.
Capitalize on improving efficiency gains. We intend to continue to work with our customers and vendors to improve our operational efficiencies and enhance our margins. We believe that improving our efficiencies will result in greater revenue and enhanced margins as fixed costs are spread over a broader revenue base.
Cross‑sell our complementary services. In addition to our hydraulic fracturing services, we offer a broad range of complementary services in support of our customers’ development activities, including cementing, coiled tubing, flowback services and drilling. These complementary services create operational efficiencies for our customers, and allow us to capture a greater percentage of their capital spending across the lifecycle of an unconventional well. We believe that, as our customers increase spending levels, we are well positioned to continue cross‑selling and growing our complementary service offerings.
Maintain financial stability and flexibility to pursue growth opportunities. Consistent with our historical practices, we plan to continue to maintain a conservative balance sheet, which will allow us to better react to potential changes in industry and market conditions and opportunistically grow our business. In the near term, we intend to continue our past practice of aligning our growth capital expenditures with visible customer demand by strategically deploying new equipment on a long‑term, dedicated basis in response to inbound customer requests. We will also selectively evaluate potential strategic acquisitions that increase our scale and capabilities or diversify our operations.
Our Customers
Our customers consist primarily of oil and natural gas producers in North America. Our top five customers accounted for approximately 68.7% 85.7%, 66.0%86.5% and 58.0%77.1% of our revenue, for the years ended December 31, 2018, 20172021, 2020 and 2016,2019, respectively. For the year ended December 31, 2018, XTO2021, Pioneer Natural Resources USA Inc. ("Pioneer") and Endeavor Energy Parsley Energy Operations, LLC and

CrownQuest Operating, LLC, Resources accounted for 24.1% 54.2% and 14.6%, 16.5%, and 12.2%, respectively, of total revenue. No other customer accounted for more than 10% of our total revenue for the year ended December 31, 2018.2021.
Competition
The markets in which we operate are highly competitive. To be successful, an oilfield services company must provide services that meet the specific needs of oil and natural gas exploration and productionE&P companies at competitive prices. Competitive factors impacting sales of our services are price, reputation, technical expertise, emissions profile, service and equipment design and quality, and health and safety standards. Although we believe our customers consider all of these factors, we believe price is a key factor in E&P companies’ criteria in choosing a service provider. However, we have recently observed the energy industry and our customers shift to lower emissions equipment, which we believe will be an increasingly important factor in an E&P company’s selection of a service provider. The transition to lower emissions equipment has been challenging for companies in the oilfield service industry because of the capital requirements and the continuing depressed pricing experienced by the service industry. While we seek to price our services competitively, we believe many of our customers elect to work with us based on our deep local roots, operational expertise, equipment’sefficiencies, productivity, equipment quality, reliability, ability to manage multifaceted logistics challenges, commitment to safety and the ability of our people to handle the most complex Permian Basin well completions, and commitment to safety and reliability.completions.
We provide our services primarily in the Permian Basin, and we compete against different companies in each service and product line we offer. Our competition includes many large and small oilfield serviceservices companies, including the largest integrated oilfield services companies. Our major competitors for hydraulic fracturing services include C&J EnergyHalliburton Company, Liberty Oilfield Services Halliburton,Inc., Nextier Oilfield Solutions Inc., Patterson‑UTI Energy Inc., RPC, Inc., Schlumberger, Keane Group, Inc., Liberty Oilfield Services, FTS International, Inc., Superior Energy Services and a number of locally orientedprivate and locally-oriented businesses.
Seasonality
Our results of operations have historically reflected seasonal tendencies, generally in the fourth quarter, relating to the conclusion of our customers’ annual capital expenditure budgets, the holidays and inclement winter weather during which we may experience declines in our operating results.
Operating Risks and Insurance
Our operations are subject to hazards inherent in the oilfield services industry, such as accidents, blowouts, explosions, fires and spills and releases that can cause personal injury or loss of life, damage or destruction of property, equipment, natural resources and the environment and suspension of operations.
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In addition, claims for loss of oil and natural gas production and damage to formations can occur in the oilfield services industry. If a serious accident were to occur at a location where our equipment and services are being used, it could result in us being named as a defendant in lawsuits asserting large claims.
Our business involves the transportation of heavy equipment and materials, and as a result, we may also experience traffic accidents which may result in spills, property damage and personal injury.
Despite our efforts to maintain safety standards, we have suffered accidents from time to time have suffered accidents in the past and anticipate that we could experience accidents in the future. In addition to the property damage, personal injury and other losses from these accidents, the frequency and severity of these incidents affect our operating costs and insurability and our relationships with customers, employees, regulatory agencies and other parties. Any significant increase in the frequency or severity of these incidents, or the general level of compensation awards, could adversely affect the cost of, or our ability to obtain, workers’ compensation and other forms of insurance, and could have other material adverse effects on our financial condition and results of operations.
We maintain commercial general liability, workers’ compensation, business auto,automobile, commercial property, umbrella liability, excess liability, and directors and officers insurance policies providing coverages of risks and amounts that we believe to be customary in our industry. Further, we have pollution legal liability coverage for our business entities, which would cover, among other things, third party liability and costs of clean up relating to environmental contamination on our premises while our equipment is in transit and on our customers’ job site. With respect to our hydraulic fracturing operations, coverage would be available under our pollution legal liability policy

for any surface or subsurface environmental clean‑up and liability to third parties arising from any surface or subsurface contamination. We also have certain specific coverages for some of our businesses, including our hydraulic fracturing services.
          We maintain directors and officers insurance; however, our insurance coverage is subject to certain exclusions (including, for example, any required SEC disgorgement or penalties) and we are responsible for meeting certain deductibles under the policies. Moreover, we cannot assure you that our insurance coverage will adequately protect us from claims made in the Logan Lawsuit or any future claims.
Although we maintain insurance coverage of types and amounts that we believe to be customary in the industry, we are not fully insured against all risks, either because insurance is not available or because of the high premium costs relative to perceived risk. Further, insurance rates have in the past been subject to wide fluctuation and changes in coverage could result in less coverage, increases in cost or higher deductibles and retentions. Liabilities for which we are not insured, or which exceed the policy limits of our applicable insurance, could have a material adverse effect on us. See “Risk Factors” for a description of certain risks associated with our insurance policies.
Environmental and Occupational Health and Safety Regulations
Our operations are subject to stringent laws and regulations governing the discharge of materials into the environment or otherwise relating to environmental protection, and occupational health and safety. Numerous federal, state and local governmental agencies issue regulations that often require difficult and costly compliance measures that could carry substantial administrative, civil and criminal penalties and may result in injunctive obligations for non compliance.non-compliance. These laws and regulations may, for example, restrict the types, quantities and concentrations of various substances that can be released into the environment, limit or prohibit construction or drilling activities on certain lands lying within wilderness, wetlands, ecologically or seismically sensitive areas and other protected areas, or require action to prevent or remediate pollution from current or former operations. Moreover, it is not uncommon for neighboring landowners and other third parties to file claims for personal injury and property damage allegedly caused by the release of hazardous substances, hydrocarbons or other waste products into the environment. Changes in environmental, health and safety laws and regulations occur frequently, and any changes that result in more stringent and costly requirements could materially adversely affect our operations and financial position. For example, following the election of President Biden and Democratic control in both houses of Congress, it is possible that our operations may be subject to greater environmental, health and safety restrictions, particularly with regards to hydraulic fracturing, permitting and greenhouse gases ("GHG") emissions. We have not experienced any material adverse effect from compliance with these requirements,current requirements; however, this trend may not continue in the future.
Below is an overview of some of the more significant environmental, health and safety requirements with which we must comply. Our customers’ operations are subject to similar laws and regulations. Any material adverse effect of these laws and regulations on our customers’ operations and financial position may also have an indirect material adverse effect on our operations and financial position.
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Waste Handling. We handle, transport, store and dispose of wastes that are subject to the Resource Conservation and Recovery Act (“RCRA”("RCRA") and comparable state laws and regulations, which affect our activities by imposing requirements regarding the generation, transportation, treatment, storage, disposal and cleanup of hazardous and non hazardousnon-hazardous wastes. With federal approval, the individual states administer some or all of the provisions of RCRA, sometimes in conjunction with their own, more stringent requirements. Although certain petroleum production wastes are exempt from regulation as hazardous wastes under RCRA, such wastes may constitute “solid wastes” that are subject to the less stringent requirements of non hazardousnon-hazardous waste provisions.
Administrative, civil and criminal penalties can be imposed for failure to comply with waste handling requirements. Moreover, the U.S. Environmental Protection Agency ("EPA") or state or local governments may adopt more stringent requirements for the handling of non hazardousnon-hazardous wastes or recategorize some non hazardousnon-hazardous wastes as hazardous for future regulation. Indeed, legislation has been proposed from time to time in Congress to recategorize certain oil and natural gas exploration, development and production wastes as hazardous wastes. Several environmental organizations have also petitioned the EPA to modify existing regulations to recategorize certain oil and natural gas exploration, development and production wastes as hazardous. Any such changes in these laws and regulations could have a material adverse effect on our capital expenditures and operating expenses. Although we do not believe the current costs of managing our wastes, as presently classified, to be significant, any legislative or regulatory reclassification of oil and natural gas exploration and production wastes could increase our costs to manage and dispose of such wastes.

Remediation of Hazardous Substances. The Comprehensive Environmental Response, Compensation and Liability Act (“CERCLA”("CERCLA" or “Superfund”"Superfund") and analogous state laws generally impose liability without regard to fault or legality of the original conduct, on classes of persons who are considered to be responsible for the release of a hazardous substance into the environment. These persons include the current owner or operator of a contaminated facility, a former owner or operator of the facility at the time of contamination and those persons that disposed or arranged for the disposal of the hazardous substance at the facility. Liability for the costs of removing or remediating previously disposed wastes or contamination, damages to natural resources, the costs of conducting certain health studies, amongst other things, is strict and joint and several. In addition, it is not uncommon for neighboring landowners and other third parties to file claims for personal injury and property damage allegedly caused by the hazardous substances released into the environment. In the course of our operations, we use materials that, if released, would be subject to CERCLA and comparable state laws. Therefore, governmental agencies or third parties may seek to hold us responsible under CERCLA and comparable state statutes for all or part of the costs to clean up sites at which such hazardous substances have been released.
One of our facilities in Midland, Texas is located within the boundaries of the West County Road 112 federal Superfund site, which site and the associated investigation and cleanup is being managed by EPA Region 6. The site’s soil and groundwater is contaminated with chromium and hexavalent chromium as a result of historic site operations unaffiliated with the Company and unassociated with the Company’s operations. Toxic tort claims also have been asserted as a result of this groundwater contamination against various unaffiliated parties. In 2013, in order to reduce the Company’s risk of incurring any future liabilities in connection with this site, the Company negotiated and obtained a bona fide prospective purchaser (“BFPP”) letter from EPA Region 6 in connection with a reorganization of the facility site ownership and lease. The BFPP letter generally acknowledges and provides that the Company is unaffiliated with any potentially responsible parties or known contamination that is the subject of the Superfund action, the Company agrees to comply with any future land use restrictions that may be imposed in connection with a site remedy (none have been imposed to date), and the Company agrees to cooperate with and provide access and assistance to EPA Region 6 in connection with the remediation. In exchange for these undertakings, the Company will not be subject to any CERCLA action by the EPA. In addition, the Company separately obtained a 10‑year environmental pollution legal liability insurance policy, effective March 4, 2013, with an aggregate limit of $20 million to insure against potential third‑party claims and any known or unknown pre‑existing conditions at the site, including Superfund or toxic tort liabilities. Both prior to and since obtaining the BFPP letter and the insurance policy, no claims have been made or threatened against the Company or any of its affiliated persons or entities with regard to this Superfund site or any related liabilities, and the Company has not incurred any significant expenses in connection with this matter.
NORM. In the course of our operations, some of our equipment may be exposed to naturally occurring radioactive materials (“NORM”("NORM") associated with oil and gas deposits and, accordingly, may result in the generation of wastes and other materials containing NORM. NORM exhibiting levels of radiation in excess of established state standards are subject to special handling and disposal requirements, and any storage vessels, piping and work area affected by NORM may be subject to remediation or restoration requirements.
Water Discharges. The Clean Water Act, Safe Drinking Water Act, Oil Pollution Act and analogous state laws and regulations impose restrictions and strict controls regarding the unauthorized discharge of pollutants, including produced waters and other gas and oil wastes, into regulated waters. The discharge of pollutants into regulated waters is prohibited, except in accordance with the terms of a permit issued by the EPA or the state. Also, spill prevention, control and countermeasure plan requirements require appropriate containment berms and similar structures to help prevent the contamination of regulated waters.
Air Emissions. The Clean Air Act (“CAA”("CAA") and comparable state laws and regulations, regulate emissions of various air pollutants through the issuance of permits and the imposition of other emissions control requirements. The EPA has developed, and continues to develop, stringent regulations governing emissions of air pollutants from specified sources. New facilities may be required to obtain permits before work can begin, and existing facilities may be required to obtain additional permits and incur capital costs in order to remain in compliance. These and other laws and regulations may increase the costs of compliance for some facilities where we operate. Obtaining or renewing permits also has the potential to delay the development of oil and natural gas projects.

Climate Change. The EPA In the United States, no comprehensive climate change legislation has determinedbeen implemented at the federal level. However, following the U.S. Supreme Court finding that greenhouse gases (“GHGs”) present an endangerment to public health andGHG emissions constitute a pollutant under the environment because such gases contribute to warming of the earth’s atmosphere and other climatic changes. Based on these findings,CAA, the EPA has adopted and implemented, and continues to adopt and implement, regulations that, restrictamong other things, establish construction and operating permit reviews for GHG emissions of GHGs under existing provisions offrom certain large stationary sources, require the CAA. The EPA also requires themonitoring and annual reporting of GHG emissions from certain largepetroleum and natural gas system sources in the United States, implement New Source Performance Standards directing the reduction of certain pollutants from certain new, modified, or reconstructed facilities in the oil and natural gas sector, and together with the Department of Transportation ("DOT"), implementing GHG emissions limits on
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vehicles manufactured for operation in the United States. In September 2020, the Trump Administration revised prior regulations to rescind certain methane standards and remove the transmission and storage segments from the source category for certain regulations. However, subsequently, the U.S. Congress approved, and President Biden signed into law, a resolution under the Congressional Review Act to repeal the September 2020 revisions to the methane standards, effectively reinstating the prior standards. Additionally in November 2021, the EPA issued a proposed rule that, if finalized, would establish OOOO(b) new source and OOOO(c) first-time existing source of standards of performance for methane and volatile organic compound emissions for oil and gas facilities. Operators of affected facilities will have to comply with specific standards of performance to include leak detection using optical gas imaging and subsequent repair equipment, and reduction of emissions by 95% through capture and control systems. The EPA plans to issue a supplemental proposal in 2022 containing additional requirements not included in the November 2021 proposed rule and anticipates the issuance of a final rule by the end of the year.
          Additionally, various states and groups of states have adopted or are considering adopting legislation, regulations or other regulatory initiatives that are focused on such areas such as GHG cap and trade programs, carbon taxes, reporting and tracking programs, and restriction of emissions. At the international level, the United Nations-sponsored "Paris Agreement," requires member states to submit non-binding, individually-determined reduction goals known as Nationally Determined Contributions (“NDCs”) every five years after 2020. Following President Biden’s executive order in January 2021, the United States rejoined the Paris Agreement and, in April 2021, established a goal of reducing economy-wide net GHG emissions 50-52% below 2005 levels by 2030. Additionally, at the 26th Conference of the Parties (“COP26”) in Glasgow in November 2021, the United States and the European Union jointly announced the launch of the Global Methane Pledge; an initiative committing to a collective goal of reducing global methane emissions by at least 30 percent from 2020 levels by 2030, including “all feasible reductions” in the energy sector. However, the impacts of these actions are unclear at this time.
          Governmental, scientific, and public concern over the threat of climate change arising from GHG emissions has resulted in increasing political risks in the United States, including climate-change-related pledges made by certain candidates for public office. On January 27, 2021, President Biden issued an executive order that commits to substantial action on climate change, calling for, among other things, the increased use of zero-emissions vehicles by the federal government, the elimination of subsidies provided to the fossil fuel industry and an increased emphasis on climate-related risk across government agencies and economic sectors. The executive order also suspends the issuance of new leases for oil and gas development on federal land; for more information, see our regulatory disclosure titled "Regulation of Hydraulic Fracturing and Related Activities." Other actions that the Biden Administration may take include the imposition of more restrictive requirements for the development of pipeline infrastructure or liquefied natural gas export facilities or more restrictive GHG emissions limitations for oil and gas facilities. Litigation risks are also increasing as a number of parties have sought to bring suit against certain oil and natural gas production facilities. The U.S. Congress has from time to time considered adopting legislation to reduce emissions of GHGs and almost one‑half of the states have already taken legal measures to reduce emissions of GHGs primarily through the planned development of GHG emission inventories and/or regional GHG cap and trade programs. In December 2015,companies operating in the United States joined the international community at the 21st Conferencein state or federal court, alleging among other things, that such companies created public nuisances by producing fuels that contributed to climate change or that such companies have been aware of the Partiesadverse effects of the United Nations Framework Convention on Climate Change in Paris, France.climate change but failed to adequately disclose those impacts to their investors or customers.
          The resulting Paris Agreement callsadoption and implementation of new or more stringent international, federal or state legislation, regulations or other regulatory initiatives that impose more stringent standards for the parties to undertake “ambitious efforts” to limit the average global temperature, and to conserve and enhance sinks and reservoirs of greenhouse gases. The Paris Agreement entered into force in November 2016. On June 1, 2017, President Trump announced that the United States planned to withdrawGHG emissions from the Paris Agreementoil and to seek negotiations either to reenternatural gas sector or otherwise restrict the Paris Agreement on different termsareas in which this sector may produce oil and natural gas or establish a new framework agreement. The Paris Agreement provides for a four‑year exit process beginning when it took effect in November 2016, which wouldgenerate GHG emissions could result in an effective exit dateincreased costs of November 2020. The United States’ adherence to the exit process is uncertain and/compliance or the terms oncosts of consuming, and thereby reduce demand for, oil and natural gas, which the United States may reenter the Paris Agreement or a separately negotiated agreement are unclear at this time.could reduce demand for our services and products.
Moreover, climate change may cause moreresult in various physical risks, such as the increased frequency or intensity of extreme weather conditionsevents or changes in the meteorological and increased volatilityhydrological patterns, that could adversely impact us, our customers’ and our suppliers’ operations. Such physical risks may result in seasonal temperatures.damage to our customers’ facilities or otherwise adversely impact our operations, such as if facilities are subject to water use curtailments in response to drought, or demand for our customers’ products, such as to the extent warmer winters reduce the demand for energy for heating purposes, which may ultimately reduce demand for the products and services we provide. Such physical risks may also impact our suppliers, which may adversely affect out ability to provide our products and services. Extreme weather conditions can interfere with our operations and increase our costs, and damage resulting from extreme weather may not be fully insured.
Endangered and Threatened Species. Environmental laws such as the Endangered Species Act (“ESA”("ESA") and analogous state laws may impact exploration, development and production activities in areas where we operate. The ESA provides broad protection for species of fish, wildlife and plants that are listed as threatened or endangered. Similar protections are offered to migratory birds under the Migratory Bird Treaty Act and various state analogs. The U.S. Fish and Wildlife Service ("FWS") may identify previously unidentified endangered or threatened species or may designate
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critical habitat and suitable habitat areas that it believes are necessary for survival of a threatened or endangered species. For example, the dunes sagebrush lizard, which is found only in the active and semi-stable shinnery oak dunes of southeastern New Mexico and adjacent portions of Texas (including areas where our customers operate), was a candidate species whichfor listing under the ESA by the FWS for many years. As a result of a recent settlement with certain environmental groups, the FWS, in July 2020, acted on a petition to list the dunes sagebrush lizard finding sufficient information to warrant a formal one-year review to consider listing the species. While that deadline has been missed, the listing review is reportedly ongoing; additionally, FWS has also solicited comments on a proposed conservation agreement that would implement certain protective practices for the species and authorize incidental take of the species resulting from certain covered activities, including exploration and development of oil and gas fields. However, to the extent any protections are implemented for this or any other species, it could cause us or our customers to incur additional costs or become subject to operating restrictions or operating bans in the affected areas.
Regulation of Hydraulic Fracturing and Related Activities. Our hydraulic fracturing operations are a significant component of our business. Hydraulic fracturing is an important and common practice that is used to stimulate production of hydrocarbons, particularly natural gas, from tight formations, including shales. The process, which involves the injection of water, sand and chemicals under pressure into formations to fracture the surrounding rock and stimulate production, is typically regulated by state oil and natural gas commissions. However, federal agencies have asserted regulatory authority over certain aspects of the process. For example, in May 2014, the EPA issued an Advanced Notice of Proposed Rulemaking seeking comment on the development of regulations under the Toxic Substances Control Act to require companies to disclose information regarding the chemicals used in hydraulic fracturing. Beginning in August 2012, the EPAhas previously issued a series of rules under the CAA that establish new emission control requirements for certain oil and natural gas production and natural gas processing operations and associated equipment. After several attempts to delay implementation, in September 2018 the EPA issued a proposal to amend and reduce such requirements. In March 2015,Separately, the Bureau of Land Management (“BLM”("BLM") previously finalized a rule governing hydraulic fracturing on federal lands. In June 2016,lands, but that rule was subsequently rescinded. Although several of these rulemakings have been rescinded, modified or subjected to legal challenges, new or more stringent regulations may be promulgated by the Biden administration. For example, in January 2021, President Biden issued an executive order suspending new leasing activities, but not operations under existing leases, for oil and gas exploration and production on non-Indian federal lands pending completion of a comprehensive review and reconsideration of federal districtoil and gas permitting and leasing practices that take into consideration potential climate and other impacts associated with oil and gas activities on such lands and waters. Although the federal court judgefor the Western District of Louisiana issued a preliminary injunction against the leasing pause, in Wyoming struck downresponse to the executive order, the Department of the Interior ("DOI") issued a report recommending various changes to the federal leasing program, though many such changes would require Congressional action. As a result, we cannot predict the final rule, findingscope of regulations or restrictions that the BLM lacked congressional authoritymay apply to promulgate the rule.oil and gas operations on federal lands. However, in July 2017, the BLM initiated a rulemaking to rescind the final rule and reinstate theany regulations that existed immediately before the published effective date of the rule. In light of the BLM’s proposed rulemaking, in September 2017, the U.S. Court of Appealsban or effectively ban such operations may adversely impact demand for the Tenth Circuit dismissed the appealour products and remanded with directions to vacate the lower court’s opinion, leaving the final rule in place. The BLM initiated a rulemaking to rescind the final rule in December 2017.services. Further, legislation to amend the Safe Drinking Water Act to repeal the exemption for hydraulic fracturing (except when diesel fuels are used) from the definition of “underground injection” and require federal permitting and regulatory control of hydraulic fracturing, as well as legislative proposals to require disclosure of the chemical constituents of the fluids used in the fracturing process, have previously been proposed in recent sessions of Congress. Several

states and local jurisdictions in which we or our customers operate also have adopted or are considering adopting regulations that could restrict or prohibit hydraulic fracturing in certain circumstances, impose more stringent operating standards and/or require the disclosure of the composition of hydraulic fracturing fluids.
More recently, federal
          Federal and state governments have begun investigatingalso investigated whether the disposal of produced water into underground injection wells has caused increased seismic activity in certain areas. In March 2016, the United States Geological Survey identified six states with the most significant hazards from induced seismicity, including Oklahoma, Kansas, Texas, Colorado, New Mexico and Arkansas. The United States Geological Survey also noted the potential for induced seismicity in Ohio and Alabama. In response to concerns regarding induced seismicity, regulators in some states have imposed, or are considering imposing, additional requirements in the permitting of produced water disposal wells or otherwise to assess any relationship between seismicity and the use of such wells. For example, Oklahoma has issued new rules for wastewater disposal wells in 2014 that imposed certainimpose permitting and operating restrictions and reporting requirements on disposal wells in proximity to faults and also, from time to time, has developed and implemented plans directing certain wells where seismic incidents have occurred to restrict or suspend disposal well operations. In particular, the Oklahoma Corporation Commission releasedCommission’s well completion seismicity guidelines in December 2016 for operators in the SCOOP and STACK that call forrequire hydraulic fracturing operations to be suspended following earthquakes of certain magnitudes in the vicinity. In addition, in February 2017, the Oklahoma Corporation Commission’s Oil and Gas Conservation Division has previously issued an order limiting future increases in the volume of oil and natural gas wastewater injected into the ground in an effort to reduce the number of earthquakes in the state. The Texas Railroad Commission ("TRRC") has adopted similar rules and, in 2014. In addition,September 2021, issued a notice to disposal well operators in December 2016, the EPA released its final report regardingGardendale Seismic Response Area near Midland, Texas to reduce daily injection volumes following multiple earthquakes above a 3.5 magnitude over an 18 month period. The notice also required disposal well operators to provide injection data to TRRC staff to further analyze seismicity in the potential impactsarea. Subsequently, the TRRC ordered the indefinite suspension of hydraulic fracturing on drinking water resources, concluding that “water cycle” activities associated with hydraulic fracturing may impact drinking water resources under certain circumstances such as water withdrawals for fracturing in times or areas of low water availability, surface spills during the management of fracturing fluids, chemicals orall deep oil and gas produced water injection of fracturing fluids into wells with inadequate mechanical integrity, injection of fracturing fluids directly into groundwater resources, discharge of inadequately treated fracturing wastewater to surface waters, and disposal or storage of fracturing wastewater in unlined pits. The resultsthe area, effective December 31, 2021. While we cannot predict the ultimate outcome of these studies could lead federalactions, any action that temporarily or permanently restricts the availability of disposal capacity for produced water or other oilfield fluids may increase our customers’ costs or require them to suspend operations, which may adversely impact demand for our products and state governments and agencies to develop and implement additional regulations.services.
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Increased regulation of hydraulic fracturing and related activities (whether as a result of the EPA study results or resulting from other factors) could subject us and our customers to additional permitting and financial assurance requirements, more stringent construction specifications, increased monitoring, reporting and record keeping obligations, and plugging and abandonment requirements. New requirements could result in increased operational costs for us and our customers, and reduce the demand for our services.
OSHA Matters. The Occupational Safety and Health Act (“OSHA”("OSHA") and comparable state statutes regulate the protection of the health and safety of workers. In addition, the OSHA hazard communication standard requires that information be maintained about hazardous materials used or produced in operations and that this information be provided to employees, state and local government authorities and the public.
EmployeesHuman Capital
          Our employees are our key asset. Our primary human capital management objectives are to effectively engage, develop, retain and reward our employees. As of December 31, 2018,2021, we employed 1,579 people. Noneapproximately 1,500 people, none of which are unionized. Of the total population over 80% of our headcount worked for or supports our pressure pumping segment. Our employees are a key component of our ability to attract and retain customers as a result of their operational excellence in the field.
         Some examples of significant programs and initiatives that are focused to attract, develop and retain our diverse workforce include:
Diversity and inclusion. We believe that in order to attract and retain talent with the skill sets and expertise required to maximize our operational efficiencies across all levels in the Company, it is in our best interest to attempt to recruit and develop a diverse team and create a culture that is inclusive and provides equal opportunities for hiring and advancement for all employees and prospective employees. Some examples of this effort include;
a commitment to conducting business in a manner that respects all human rights in compliance within the requirements of applicable laws;
efforts to promote and encourage respect for human rights and fundamental freedoms for all without distinctions of any kind such as race, color, sex, language, religion, political or other opinions;
working in partnership with personnel, business parties and other parties directly linked to our operations that share our commitment to these same principles;
efforts in our employment practices, including through our code of conduct, our equal employment opportunity employer policy, and our anti-harassment policy; and
to make it possible for grievances regarding health and safety to be addressed early and remediated directly, in confidence and without fear of retaliation; the Company provides an anonymous Ethics and Compliance hotline that is promoted internally and accessible from our intranet and internet.
Training and Safety. We offer in-depth, role-appropriate safety training upon hiring and as part of the continuous development of our employees. The safety of our employees, our customers, and the communities in which we operate is paramount. We track and evaluate safety incidents at wellsites and offices, and if an accident does occur, we take actions to mitigate similar incidents from reoccurring in the future. The Company incentivizes employees to focus on conducting operations in accordance with our strict safety standards and encourages employees to immediately report any breach of safety protocol. Ten percent of our executive officers’ annual target bonuses under the 2021 annual incentive program were based upon the Company’s achievement of certain safety goals, including a target total recordable incident rate of less than 0.75.
Professional Development. In 2021 ProPetro introduced a Tuition Reimbursement Program to encourage employees to pursue professional development interests that will help strengthen skills and competencies required for their current position or future roles in the business. This program is designed to provide assistance and offset related training expense.

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Health, Wellness and Benefits. Our employee benefit offerings are representeddesigned to meet the varied and evolving needs of a diverse workforce across the Company and we believe are consistent with those provided by labor unions or subject to collective bargaining agreements.
We file annual, quarterly and current reports, proxy statements and other informationour peer companies with which we compete for talent. The Company provides employees with the SEC.ability to participate in health and welfare plans, including medical, dental, life, accidental death and dismemberment and short-term and long-term disability insurance plans. Since the beginning of COVID-19, we have implemented processes and procedures to help address COVID-19 matters. Below are some of the adjustments we made to address the COVID-19 pandemic;
instituted periodic update, guidelines and questionnaires to all employees to address and identify COVID-19 related matters;
initially instituted a temporary remote work environment in response to COVID-19 and have retained the flexibility for employees to work remotely when necessary or advisable;
encouraged all employees to adhere to guidelines provided by the Centers for Disease Control and Prevention; and
provided coverage for COVID-19 testing and vaccination under the Company’s medical plan at no cost to our employees.
         In 2021, we performed an extensive review of our health-related benefits program to ensure that our offerings are market competitive and effectively utilized by employees. Based on that review, we made comprehensive adjustments to our health-related benefits programs, which improved the cost and quality of coverage. We significantly increased the number of employee meetings to provide education and encourage individuals to maximize the value of benefits offered, resulting in an overall increase in participation and positive feedback from employees.

         We have also recently initiated a plan to review our 401(k) plan and implement improvements in 2022 with a focus on improving plan structure, reducing program administration, providing employee education and increasing plan participation.

Availability of Filings
          Our SEC filingsAnnual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), are made available to the public over the Internet at the SEC’sfree of charge on our internet web site at www.sec.gov. You may also read and copy any documentwww.propetroservices.com, as soon as reasonably practicable after we file athave electronically filed the SEC’s public reference room in Washington, D.C. Please call the SEC at 1-800-SEC-0330 for further information on their public reference room. Our SEC filings are also availablematerial with, or furnished it to, the public onSEC. The SEC maintains an internet site that contains our website at www.propetroservices.com.reports, proxy and information statements and our other SEC filings. The address of that web site is www.sec.gov. Please note that information contained on our website, whether currently posted or posted in the future, is not a part of this Annual Report on Form 10-K or the documents incorporated by reference in this Annual Report on Form 10-K. This Annual Report on Form 10-K also contains summaries of the terms of certain agreements that we have entered into that are filed as exhibits to this Annual Report on Form 10-K or other reports that we have filed with the SEC. The descriptions contained in this Annual Report on Form 10-K ofReport.

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those agreements do not purport to be complete and are subject to, and qualified in their entirety by reference to, the definitive agreements. You may request a copy of the agreements described herein at no cost by writing or telephoning us at the following address: ProPetro Holding Corp., Attention: Investor Relations, P.O. Box 873, Midland, Texas 79702, phone number (432) 688-0012.



Item 1A.    Risk Factors.
The following is a description of significant factors that could cause actual results to differ materially from those contained in forward-looking statementstatements made in this Annual Report on Form 10-K and presented elsewhere by management from time to time. Such factors may have a material adverse effect on our business, financial condition and results of operations. It is not possible to predict or identify all such factors. Consequently, you should not consider any such list to be a complete statement of all our potential risks or uncertainties. Due to these, and other factors, past performance should not be considered an indication of future performance.
Risks Inherent in Our Business and Industry
Our business and financial performance depends on the historically cyclical oil and natural gas industry and particularly on the level of capital spending and exploration and production activity within the United States and in the Permian Basin, and a decline in prices for oil and natural gas may cause fluctuation in operating results or otherwise have an adverse effect on our revenue, cash flows, profitability and growth.
Demand for most of our services depends substantially on the level of capital expenditures in the Permian Basin by companies in the oil and natural gas industry. As a result, our operations are dependent on the levels of capital spending and activity in oil and gas exploration, development and production. A prolonged reduction inDemand for our services is largely dependent on oil and natural gas prices, and our customers’ completion budgets and rig count. Prolonged low oil and gas prices would generally depress the level of oil and natural gas exploration, development, production, and well completion activity and would result in a corresponding decline in the demand for the hydraulic fracturing services that we provide. Historically, oil prices and markets have been extremely volatile. Prices are affected by many factors beyond our control. WTI oil price declined significantly in 2015 and 2016 to approximately $30 per barrel, but subsequently recovered in 2017. Furthermore, in March 2020, WTI oil price declined to a low of approximately $20 per barrel and then subsequently recovered. The significant declineaverage WTI oil prices per barrel were approximately $68, $39 and $57 for the years ended December 31, 2021, 2020 and 2019, respectively. Recently, WTI oil price reached a 7-year high of over $90 per barrel in February 2022. In the last three years, the highly volatile and unpredictable nature of oil and natural gas prices during 2015 and 2016 caused a reduction in our customers’ spending and associated drilling and completion activities, which has had an adverse effect on our revenue. If prices wereand may continue to decline, similar declines in our customers’ spending would have an adverse effect on our revenue. In addition, a worsening of these conditions may result in a material adverse impact on certain of our customers’ liquidityrevenue and financial position resulting in further spending reductions, delayscash flows, if WTI oil prices remain highly volatile or decline in the collection of amounts owing to us and similar impacts.future.
Many factors over which we have no control affect the supply of, and demand for our services, and our customers’ willingness to explore, develop and produce oil and natural gas, and therefore, influence prices for our services, including:
the severity and duration of world health events, including the COVID-19 pandemic, related economic repercussions;
the actions by the members of OPEC+ with respect to oil production levels and announcements of potential changes in such levels, including the ability of the OPEC+ countries to agree on and comply with supply limitations;
the domestic and foreign supply of, and demand for, oil and natural gas;
the level of prices, and expectations about future prices, of oil and natural gas;
the level of global oil and natural gas exploration and production;
the cost of exploring for, developing, producing and delivering oil and natural gas;
the supply of and demand for drilling and hydraulic fracturing equipment, including the supply and demand for lower emissions hydraulic fracturing equipment;
cost increases and supply chain constraints related to our services;
the expected decline rates of current production;
the price and quantity of foreign imports;
political and economic conditions in oil and natural gas producing countries and regions, including the United States, the Middle East, Africa, South America and Russia;
actions by
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operational challenges relating to the membersCOVID-19 pandemic and efforts to mitigate the spread of Organizationthe virus, including logistical challenges, protecting the health and well-being of Petroleum Exporting Countries with respect to oil production levelsour employees, remote work arrangements, performance of contracts and announcements of potential changes in such levels;supply chain disruptions;
speculative trading in crude oil and natural gas derivative contracts;
the level of consumer product demand;
the discovery rates of new oil and natural gas reserves;
contractions in the credit market;

the strength or weakness of the U.S. dollar;
available pipeline and other transportation capacity;
the levels of oil and natural gas storage;
weather conditions and other natural disasters;
domestic and foreign tax policy;
domestic and foreign governmental approvals and regulatory requirements and conditions;conditions, including tighter emissions standards in the energy industry;
the continued threat of terrorism and the impact of military and other action, including military action in the Middle East;
political or civil unrest in the United States or elsewhere;
technical advances affecting energy consumption;
the proximity and capacity of oil and natural gas pipelines and other transportation facilities;
the price and availability of alternative fuels;
the ability of oil and natural gas producers to raise equity capital and debt financing;
merger and divestiture activity among oil and natural gas producers; and
overall domestic and global economic conditions.
These factors and the volatility of the energy markets make it extremely difficult to predict future oil and natural gas price movements with any certainty. SuchFor example, in 2020, Saudi Arabia and Russia failed to agree on a decline wouldplan to cut production of oil and gas within OPEC and Russia. Subsequently, Saudi Arabia announced plans to increase production and reduce the prices at which they sell oil. These events, combined with the COVID-19 pandemic that has negatively impacted the economic activity and disrupted the supply chains of certain of our customers, have a material adverse effect on our business, resultscontributed to the unpredictable nature of operation and financial condition.crude oil prices.
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The cyclical nature of the oil and natural gas industry may cause our operating results to fluctuate.
We derive our revenues from companies in the oil and natural gas exploration and production industry, a historically cyclical industry with levels of activity that are significantly affected by the levels and volatility of oil and natural gas prices. We have experienced, and may in the future experience, significant fluctuations in operating results as a result of the reactions of our customers to changes in oil and natural gas prices. For example, prolonged low commodity prices experienced by the decline in and unpredictable nature of oil and natural gas industry during 2015prices in 2019 and 2016,2020, combined with adverse changes in the capital and credit markets and the COVID-19 pandemic in 2020, caused many exploration and production companies to significantly reduce their 2020 and 2021 capital budgets and drilling activity. This resulted in a significant decline in demand for oilfield services and adversely impacted the prices oilfield services companies couldcan charge for their services. These factors have materially and adversely affected our business, results of operations and financial condition. In addition, a majority of the service revenue we earn is based upon a charge for a relatively short period of time (for example, a day, a week or a month) for the actual period of time the service is provided to our customers. By contracting services on a short‑term basis, we are exposed to the risks of a rapid reduction in market prices and utilization and resulting volatility in our revenues.
Events outside of our control, including an epidemic or outbreak of an infectious disease, such as COVID-19, may materially adversely affect our business.
          We face risks related to epidemics, outbreaks or other public health events that are outside of our control, and could significantly disrupt our operations and adversely affect our financial condition. The global or national outbreak of an illness or any other communicable disease, or any other public health crisis, such as COVID-19, may cause disruptions to our business and operational plans, which may include (i) shortages of employees, (ii) unavailability of contractors and subcontractors, (iii) interruption of supplies from third parties upon which we rely, (iv) recommendations of, or restrictions imposed by, government and health authorities, including quarantines, and (v) restrictions that we and our contractors, subcontractors and our customers impose, including facility shutdowns, to ensure the safety of employees. For example, in response to COVID-19, we made adjustments to some of our business processes that helped and will continue to help address the impact to the COVID-19 pandemic.
          The COVID-19 pandemic has spread across the globe and impacted financial markets and worldwide economic activity and adversely affected our operations in the recent years. In addition, the effects of COVID-19 across the globe have negatively impacted the domestic and international demand for crude oil and natural gas, which has contributed to price volatility, impacted the operations and activity levels of our customers and materially and adversely affected the demand for oilfield services. These factors also negatively impacted our current suppliers and their ability or willingness to provide the necessary equipment, parts or raw materials, and they may fail to deliver the products timely and in the quantities required. Any resulting delays or restrictions from COVID-19 on the provision of our services could have a material adverse effect on our business, financial condition, results of operations and cash flows. As the potential impact from COVID-19 is difficult to predict, the extent to which it may negatively affect our operating results or the duration of any potential business disruption is uncertain. Any potential impact will depend on future developments and new information that may emerge regarding the COVID-19 infection rate or the efficacy and distribution of COVID-19 vaccines, and the actions taken by authorities to contain it or treat its impact, all of which are beyond our control. These potential impacts, while uncertain, could adversely affect our business, results of operations and financial condition.
The majority of our operations are located in the Permian Basin, making us vulnerable to risks associated with operating in one major geographic area.
Our operations are geographically concentrated in the Permian Basin. For the years ended December 31, 2018, 20172021, 2020 and 20162019, approximately 98.7%, approximately 99%, 97%99.5% and 97%99.4%, respectively, of our revenues were attributable to our operations in the Permian Basin. As a result of this concentration, we may be disproportionately exposed to the impact of regional supply and demand factors, delays or interruptions of production from wells in the Permian Basin caused by significant governmental regulation, processing or transportation capacity constraints, market limitations, curtailment of production or interruption of the processing or transportation of oil and natural gas produced from the wells in these areas. In addition, the effect of fluctuations on supply and demand may become more pronounced within specific geographic oil and natural gas producing areas such as the Permian Basin, which may cause these

conditions to occur with greater frequency or magnify the effects of these conditions. Due to the concentrated nature of our operations, we could experience any of the same conditions at the same time, resulting in a relatively greater impact on our revenue than they might have on other companies that have more geographically diverse operations.
We are exposed
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Our business may be adversely affected by a deterioration in general economic conditions or a weakening of the broader energy industry.
          A prolonged economic slowdown or recession in the United States, adverse events relating to the credit riskenergy industry or regional, national and global economic conditions and factors, particularly a further slowdown in the exploration and production industry, could negatively impact our operations and therefore adversely affect our results. The risks associated with our business are more acute during periods of our customers,economic slowdown or recession because such periods may be accompanied by decreased exploration and any material nonpayment or nonperformancedevelopment spending by our customers, could adversely affect our business, results of operations and financial condition.
We are subject to the risk of loss resulting from nonpayment or nonperformance by our customers. Our credit procedures and policies may not be adequate to fully eliminate customer credit risk. If we fail to adequately assess the creditworthiness of existing or future customers or unanticipated deterioration in their creditworthiness, any resulting increase in nonpayment or nonperformance by them and our inability to re‑market or otherwise use the production could have a material adverse effect on our business, results of operations and financial condition. The depresseddecreased demand for oil and natural gas and decreased prices in 2015 and 2016 negatively impacted the financial condition and liquidity of our customers, and future declines, sustained lower prices, or continued volatility could impact their ability to meet their financial obligations to us.
We face significant competition that may cause us to lose market share.
The oilfield services industry is highly competitive and has relatively few barriers to entry. The principal competitive factors impacting sales of our services are price, reputation and technical expertise, equipment and service quality and health and safety standards. The market is also fragmented and includes numerous small companies capable of competing effectively in our markets on a local basis, as well as several large companies that possess substantially greater financial and other resources than we do. Our larger competitors’ greater resources could allow those competitors to compete more effectively than we can. For instance, our larger competitors may offer services at below‑market prices or bundle ancillary services at no additional cost to our customers. We compete with large national and multi‑national companies that have longer operating histories, greater financial, technical and other resources and greater name recognition than we do. Several of our competitors provide a broader array of services and have a stronger presence in more geographic markets. In addition, we compete with several smaller companies capable of competing effectively on a regional or local basis.
Some jobs are awarded on a bid basis, which further increases competition based on price. Pricing is often the primary factor in determining which qualified contractor is awarded a job. The competitive environment may be further intensified by mergers and acquisitions amongfor oil and natural gas companiesgas. In 2020, the COVID-19 pandemic and the turmoil between the members of OPEC+ caused oil prices to fall substantially and adversely impacted the global economy; a recurrence of similar events would heighten the risk of a prolonged economic slowdown or other events that have the effect of reducing the number of available customers. As a result of competition, we may lose market share or be unable to maintain or increase prices for our present services or to acquire additional business opportunities, which could have a material adverse effect on our business, financial condition, results of operations and cash flows.
Our competitors may be able to respond more quickly to new or emerging technologies and services and changes in customer requirements. The amount of equipment available may exceed demand, which could result in active price competition. In addition, depressed commodity prices lower demand for hydraulic fracturing equipment, which results in excess equipment and lower utilization rates. In addition, some exploration and production companies have commenced completing their wells using their own hydraulic fracturing equipment and personnel. Any increaserecession in the development and utilization of in‑house fracturing capabilities by our customers could decrease the demand for our services and have a material adverse impact on our business.
Furthermore, competition among oilfield service and equipment providers is affected by each provider’s reputation for safety and quality. We cannot assure that we will be able to maintain our competitive position.United States.
New technology may cause us to become less competitive.
The oilfield services industry is subject to the introduction of new drilling and completion techniques and services using new technologies, some of which may be subject to patent or other intellectual property protections. Although we believe our equipment and processes currently give us a competitive advantage, asAs competitors and others use or develop new or comparable technologies in the future, we may lose market share or be placed at a competitive disadvantage. The transition to lower emissions equipment is capital intensive and could require us to convert our conventional Tier II equipment to lower emissions equipment. If we are unable to quickly transition to lower emissions equipment, the demand for our services could be adversely impacted. For example, many E&P companies, including our customers, are transitioning to a lower emissions operating environment and may require us to invest in pressure pumping equipment with lower emissions profile. Further, we may face competitive pressure to develop, implement or acquire and deploy certain new

technologiestechnology improvements at a substantial cost.cost, such as our DuraStim® fleets or the cost of implementing or purchasing a technology like DuraStim® may be substantially higher than anticipated, and we may not be able to successfully implement the DuraStim® fleets or other technologies we may purchase. Some of our competitors have greater financial, technical and personnel resources that may allow them to enjoy technological advantages and develop and implement new products on a timely basis or at an acceptable cost. We cannot be certain that we will be able to develop and implement new technologies or products on a timely basis or at an acceptable cost. Limits on our ability to develop, effectively use and implement new and emerging technologies could have a material adverse effect on our business, financial condition, prospects or results of operations.
Our business depends upon our ability to obtain specialized equipment, parts and key raw materials, including frac sand and chemicals, from third‑party suppliers, and we may be vulnerable to delayed deliveries and future price increases.
We purchase specialized equipment, parts and raw materials (including, for example, frac sand, chemicals and fluid ends) from third party suppliers and affiliates. At times during the business cycle, there is a high demand for hydraulic fracturing and other oil field services and extended lead times to obtain equipment and raw materials needed to provide these services. Should our current suppliers be unable or unwilling to provide the necessary equipment, parts or raw materials or otherwise fail to deliver the products timely and in the quantities required, any resulting delays in the provision of our services could have a material adverse effect on our business, financial condition, results of operations and cash flows. In addition, future price increases for this type of equipment, parts and raw materials could negatively impact our ability to purchase new equipment, to update or expand our existing fleet, to timely repair equipment in our existing fleet or meet the current demands of our customers.
Reliance upon a few large customers may adversely affect our revenue and operating results.
The majority of our revenue is generated from our hydraulic fracturing services. Due to the large percentage of our revenue historically derived from our hydraulic fracturing services with recurring customers and the limited availability of our fracturing units, we have had some degree of customer concentration. Our top ten customers represented approximately 85.5%, 87.0% and 83.0% of our consolidated revenue for the years ended December 31, 2018, 2017 and 2016, respectively. It is likely that we will depend on a relatively small number of customers for a significant portion of our revenue in the future. If a major customer fails to pay us, revenue would be impacted and our operating results and financial condition could be harmed. Additionally, if we were to lose any material customer, we may not be able to redeploy our equipment at similar utilization or pricing levels and such loss could have an adverse effect on our business until the equipment is redeployed at similar utilization or pricing levels.
Certain of our completion services, particularly our hydraulic fracturing services, are substantially dependent on the availability of water. Restrictions on our or our customers’ ability to obtain water may have an adverse effect on our financial condition, results of operations and cash flows.
Water is an essential component of unconventional shale oil and natural gas production during both the drilling and hydraulic fracturing processes. Over the past several years, certain of the areas in which we and our customers operate have experienced extreme drought conditions and competition for water in such areas is growing. In addition, some state and local governmental authorities have begun to monitor or restrict the use of water subject to their jurisdiction for hydraulic fracturing to ensure adequate local water supply. For instance, some states require E&P companies to report certain information regarding the water they use for hydraulic fracturing and to monitor the quality of groundwater surrounding some wells stimulated by hydraulic fracturing. Generally, our water requirements are met by our customers from sources on or near their sites, but there is no assurance that our customers will be able to obtain a sufficient supply of water from sources in these areas. Our or our customers’ inability to obtain water from local sources or to effectively utilize flowback water could have an adverse effect on our financial condition, results of operations and cash flows.
We rely on a few key employees whose absence or loss could adversely affect our business.
Many key responsibilities within our business have been assigned to a small number of employees. The loss of their services could adversely affect our business. In particular, the loss of the services of one or more members of our executive team, such as our Chief Executive Officer, Chief Operating Officer, Chief Financial Officer, Chief Accounting Officer and General Counsel could disrupt our operations. We do not maintain “key person” life

insurance policies on any of our employees. As a result, we are not insured against any losses resulting from the death of our key employees.
If we are unable to employ a sufficient number of skilled and qualified workers, our capacity and profitability could be diminished and our growth potential could be impaired.
The delivery of our services requires skilled and qualified workers with specialized skills and experience who can perform physically demanding work. As a result of the volatility of the oilfield services industry and the demanding nature of the work, workers may choose to pursue employment in fields that offer a more desirable work environment at wage rates that are competitive. Our ability to be productive and profitable will depend upon our ability to employ and retain skilled workers. In addition, our ability to expand our operations depends in part on our ability to increase the size of our skilled labor force. The demand for skilled workers is high, and the supply is limited. As a result, competition for experienced oilfield service personnel is intense, and we face significant challenges in competing for crews and management with large and well‑established competitors. A significant increase in the wages paid by competing employers could result in a reduction of our skilled labor force, increases in the wage rates that we must pay, or both. If either of these events were to occur, our capacity and profitability could be diminished and our growth potential could be impaired.
Our operations require substantial capital and we may be unable to obtain needed capital or financing on satisfactory terms, or at all, which could limit our ability to grow.
The oilfield services industry is capital intensive. In conducting our business and operations, we have made, and expect to continue to make, substantial capital expenditures. Our total capital expenditures incurred were approximately $592.6$165.2 million $305.3, $81.2 million and $46.0$400.7 million during the years ended December 31, 2018, 20172021, 2020 and 2016.2019. We have historically financed capital expenditures primarily with funding from cash on hand, cash flow from operations, equipment and vendor financing and borrowings under our credit facilities.facility. We may be unable to generate sufficient cash from operations and other capital resources to maintain planned or future levels of capital expenditures which, among other things, may prevent us from acquiring new equipment (including equipment with a lower emissions profile) or properly maintaining our existing equipment. Further, anyAny disruptions or continuing volatility in the global financial markets may lead to an increase in interest rates or a contraction in credit availabilityavailability impacting our ability to finance our operations. Our borrowing base changed from $61.1 million as of December 31, 2021 to approximately $79.0 million as of February 18, 2022 due to a change in our eligible accounts receivable. If our customer activity levels decline in the future resulting in a decrease in our eligible accounts receivable, our borrowing base could decline. This could put us at a competitive disadvantage or interfere with our growth plans. Further, our actual capital expenditures could exceed our capital expenditure budget. In the event our capital expenditure requirements at any time are greater than the amount of liquidity we have available, we could be required to seek additional sources of capital, which may include debt financing, joint venture partnerships, sales of assets, offerings of debt or equity securities or other means. We may not be able to obtain any such alternative source of capital. We may be required to curtail or eliminate contemplated activities. If we can obtain alternative sources of capital, the terms of such alternative may not be favorable to us. In particular, the terms of any debt financing may include covenants that significantly restrict our operations. Our inability to grow as planned may reduce our chances of maintaining and improving profitability.
Concerns over general economic, business or industry conditions may have a material adverse effect on our results of operations, liquidity and financial condition.
Concerns over global economic conditions, geopolitical issues, public health crises (including the COVID-19 pandemic), interest rates, inflation, the availability and cost of credit andin the United States and foreign financial markets have contributed to increased economic uncertainty and diminished expectations for the global economy. These factors, combined with volatility in commodity prices, business and consumer confidence and unemployment rates, have precipitatedcould
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precipitate an economic slowdown. Concerns about global economic growth have had a significant adverse impact on global financial markets and commodity prices. The historically unpredictable nature of oil and natural gas prices, and particularly the volatility over the past two years have caused a reduction in our customers’ spending and associated drilling and completion activities, which had and may continue to have an adverse effect on our revenue and cash flows. If the economic climate in the United States or abroad deteriorates or remains uncertain, worldwide demand for petroleum products could diminish, further, which could impact the price at which oil, natural gas and natural gas liquids can be sold, which could affect the ability of our customers to continue operations and adversely impact our results of operations, liquidity and financial condition.

Our indebtedness and liquidity needs could restrict our operations and make us more vulnerable to adverse economic conditions.
Our existing and future indebtedness, whether incurred in connection with acquisitions, operations or otherwise, may adversely affect our operations and limit our growth, and we may have difficulty making debt service payments on such indebtedness as payments become due. Our level of indebtedness may affect our operations in several ways, including the following:
•    increasing our vulnerability to general adverse economic and industry conditions;
•    the covenants that are contained in the agreements governing our indebtedness could limit our ability to borrow funds, dispose of assets, pay dividends and make certain investments;
•    our debt covenants could also affect our flexibility in planning for, and reacting to, changes in the economy and in our industry;
•    any failure to comply with the financial or other debt covenants, including covenants that impose requirements to maintain certain financial ratios, could result in an event of default, which could result in some or all of our indebtedness becoming immediately due and payable;
•    our level of debt could impair our ability to obtain additional financing, or obtain additional financing on favorable terms in the future for working capital, capital expenditures, acquisitions or other general corporate purposes; and
•    our business may not generate sufficient cash flow from operations to enable us to meet our obligations under our indebtedness.
Restrictions in our ABL Credit Facility (as defined herein) and any future financing agreements may limit our ability to finance future operations or capital needs or capitalize on potential acquisitions and other business opportunities.
The operating and financial restrictions and covenants in our credit facility and any future financing agreements could restrict our ability to finance future operations or capital needs or to expand or pursue our business activities. For example, our ABL Credit Facility restricts or limits our ability to:
grant liens;
incur additional indebtedness;
engage in a merger, consolidation or dissolution;
enter into transactions with affiliates;
sell or otherwise dispose of assets, businesses and operations;
materially alter the character of our business as currently conducted; and
make acquisitions, investments and capital expenditures.
Furthermore, our ABL Credit Facility contains certain other operating and financial covenants. Our ability to comply with the covenants and restrictions contained in the ABL Credit Facility may be affected by events beyond our control, including prevailing economic, financial and industry conditions. If market or other economic conditions deteriorate, our ability to comply with these covenants may be impaired. If we violate any of the restrictions, covenants, ratios or tests in our ABL Credit Facility, a significant portion of our indebtedness may become immediately due and
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payable and our lenders’ commitment to make further loans to us may terminate. Further, our borrowing base, as redetermined monthly, is tied to 85.0% of eligible accounts receivable. Changes to our operational activity levels or customer concentration levels have an impact on our total eligible accounts receivable, which could result in significant changes to our borrowing base and therefore our availability under our ABL Credit Facility. For example, our borrowing base changed from $61.1 million as of December 31, 2021 to approximately $79.0 million as of February 18, 2022 due to a change in our eligible accounts receivable. If our customer activity declines in the future, our borrowing base could decline. If our borrowing base is reduced below the amount of our outstanding borrowings, we will be required to repay the excess borrowings immediately on demand by the lenders. We might not have, or be able to obtain, sufficient funds to make these accelerated payments. Any subsequent replacement of our ABL Credit Facility or any new indebtedness could have similar or greater restrictions. Please

read “Management’s"Management’s Discussion and Analysis of Financial Condition and Results of Operations — Liquidity and Capital Resources — Credit Facility and Other Financing Arrangements .”Arrangements."
We may become more leveragedincur debt and our indebtedness could adversely affect our operations and financial condition.
Our business is capital intensive and we may seek to raise debt capital to fund our business and growth strategy. Indebtedness could have negative consequences that could materially and adversely affect our business, financial condition, results of operations, cash flows and prospects, such as:
requiring us to dedicate a substantial portion of our cash flow from operating activities to payments on our indebtedness, thereby reducing the availability of cash flow to fund working capital, capital expenditures, research and development efforts, potential strategic acquisitions and other general corporate purposes;
limiting our ability to obtain additional financing to fund growth, working capital or capital expenditures, or to fulfill debt service requirements or other cash requirements;
increasing our vulnerability to economic downturns and changing market conditions; and
placing us at a competitive disadvantage relative to competitors that have less debt;debt.
          Furthermore, interest rates on future indebtedness could be higher than current levels, causing our financing costs to increase accordingly. In addition, LIBOR and
to the extent that our debt is other “benchmark” rates are subject to floatingongoing national and international regulatory scrutiny and reform. In July 2017, the United Kingdom’s Financial Conduct Authority, which regulates LIBOR, announced that it intends to phase out LIBOR by the end of June 2023 for US dollars setting. At this time, no consensus exists as to what rate or rates may become acceptable alternatives to LIBOR and we are unable to predict the effect of any such alternatives on our business and results of operations. However, if LIBOR is phased out without a replacement benchmark, our only option under the ABL Credit Facility will be to borrow at the Base Rate (as defined in the ABL Credit Facility) until an alternative benchmark rate is selected. Changes in interest rates, increasingeither positive or negative, may affect the yield requirements of investors who invest in our vulnerabilityshares, and a rising interest rate environment could have an adverse impact on the price of our shares, our ability to fluctuationsissue equity or incur debt.
We may record losses or impairment charges related to goodwill and long-lived assets.
          Changes in future market conditions and prolonged periods of low utilization, changes in technology or the sale of assets below their carrying value may cause us to experience losses in our results of operations. These events could result in the recognition of impairment charges or losses from asset sales that negatively impact our financial results. Significant impairment charges or losses from asset sales as a result of a decline in market interest rates.conditions or otherwise could have a material adverse effect on our results of operations in future periods. For example, in 2021, we recorded loss on disposal of asset $3.5 million in connection with the sale of our two turbines. In addition, our DuraStim® equipment remains under evaluation and has yet to be commercialized. If we are not able to successfully commercialize the DuraStim® equipment, and are not able to deploy the equipment for alternative uses, we will incur impairment losses on the carrying value of the DuraStim® equipment. As of December 31, 2021, the carrying value of our DuraStim® equipment is approximately $90 million. If oil and natural gas prices trade at depressed price levels as experienced in the first half of 2020, and our equipment remains idle or under-utilized, the estimated fair value of such equipment may decline, which will result in additional impairment expense in the future.

Our operations are subject to unforeseen interruptions and hazards inherent in the oil and natural gas industry, for which we may not be adequately insured and which could cause us to lose customers and substantial revenue.
Our operations are exposed to the risks inherent to our industry, such as equipment defects, vehicle accidents, worksite injuries to our or third-party personnel, fires, explosions, blowouts, surface cratering, uncontrollable flows of gas or well fluids, pipe or pipeline failures, abnormally pressured formations and various environmental hazards, such as oil
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spills and releases of, and exposure to, hazardous substances. For example, our operations are subject to risks associated with hydraulic fracturing, including any mishandling, surface spillage or potential underground migration of fracturing fluids, including hydrochloric acid and other chemical additives. In addition, our operations are exposed to potential natural disasters, including blizzards, tornadoes, storms, floods, other adverse weather conditions and earthquakes. The occurrence of any of these events could result in substantial losses to us due to injury or loss of life, severe damage to or destruction of property, natural resources and equipment, pollution or other environmental damage, clean‑up responsibilities, regulatory investigations and penalties or other damage resulting in curtailment or suspension of our operations.operations or the loss of customers. The cost of managing such risks may be significant. The frequency and severity of such incidents will affect operating costs, insurability and relationships with customers, employees and regulators. In particular, our customers may elect not to purchase our services if they view our environmental or safety record as unacceptable, which could cause us to lose customers and substantial revenues.
Our insurance may not be adequate to cover all losses or liabilities we may suffer. We are also self-insured up to $10 million per occurrence for certain losses arising from or attributable to fire and/or explosion at the wellsites. Furthermore, we may be unable to maintain or obtain insurance of the type and amount we desire at reasonable rates. As a result of market conditions, premiums and deductibles for certain of our insurance policies have increased and could escalate further. In addition, sub‑limits have been imposed for certain risks. In some instances, certain insurance could become unavailable or available only for reduced amounts of coverage. If we were to incur a significant liability for which we are not fully insured, it could have a material adverse effect on our business, results of operations and financial condition. In addition, we may not be able to secure additional insurance or bonding that might be required by new governmental regulations. This may cause us to restrict our operations, which might severely impact our financial position.
Since hydraulic fracturing activities are part of our operations, they are covered by our insurance against claims made for bodily injury, property damage and clean‑up costs stemming from a sudden and accidental pollution event.

However, we may not have coverage if we are unaware of the pollution event and unable to report the “occurrence”"occurrence” to our insurance company within the time frame required under our insurance policy. In addition, these policies do not provide coverage for all liabilities, and the insurance coverage may not be adequate to cover claims that may arise, or we may not be able to maintain adequate insurance at rates we consider reasonable. A loss not fully covered by insurance could have a material adverse effect on our financial position, results of operations and cash flows.
A terrorist attack, or armed conflict or political or civil unrest could harm our business.
Terrorist activities, anti‑terrorist efforts, and other armed conflicts involving the United Statesand political or civil unrest could adversely affect the U.S. and global economies and could prevent us from meeting financial and other obligations. We could experience loss of business, delays or defaults in payments from payors or disruptions of fuel supplies and markets if pipelines, production facilities, processing plants, refineries or transportation facilities are direct targets or indirect casualties of an act of terror or war. Such activities could reduce the overall demand for oil and natural gas, which, in turn, could also reduce the demand for our services. Terrorist activities, and the threat of potential terrorist activities, political or civil unrest and any resulting economic downturn could adversely affect our results of operations, impair our ability to raise capital or otherwise adversely impact our ability to realize certain business strategies.
Increasing trucking regulations may increase our costs and negatively impact our results of operations.
In connection with our business operations, including the transportation and relocation of our hydraulic fracturing equipment and shipment of frac sand, we operate trucks and other heavy equipment. As such, we operate as a motor carrier in providing certain of our services and therefore are subject to regulation by the United States Department of Transportation and by various state agencies. These regulatory authorities exercise broad powers, governing activities such as the authorization to engage in motor carrier operations, driver licensing, insurance requirements, financial reporting and review of certain mergers, consolidations and acquisitions, and transportation of hazardous materials (HAZMAT). Our trucking operations are subject to possible regulatory and legislative changes that may increase our costs. Some of these possible changes include increasingly stringent environmental regulations, changes in the hours of service regulations which govern the amount of time a driver may drive or work in any specific period, onboard black box recorder device requirements or limits on vehicle weight and size.
Interstate motor carrier operations are subject to safety requirements prescribed by the United States Department of Transportation. To a large degree, intrastate motor carrier operations are subject to state safety regulations that mirror federal regulations. Matters such as the weight and dimensions of equipment are also subject to federal and state regulations. From time to time, various legislative proposals are introduced, including proposals to increase federal, state, or local taxes, including taxes on motor fuels, which may increase our costs or adversely impact the recruitment of drivers. We cannot predict whether, or in what form, any increase in such taxes applicable to us will be enacted.
Certain motor vehicle operators require registration with the Department of Transportation. This registration requires an acceptable operating record. The Department of Transportation periodically conducts compliance reviews and may revoke registration privileges based on certain safety performance criteria that could result in a suspension of operations.
We are subject to environmental laws and regulations, and future compliance, claims, and liabilities relating to such matters may have a material adverse effect on our results of operations, financial position or cash flows.
The nature of our operations, including the handling, transporting and disposing of a variety of fluids and substances, including hydraulic fracturing fluids and other regulated substances, air emissions, and wastewater discharges exposes us to some risks of environmental liability, including the release of pollutants from oil and natural gas wells and associated equipment to the environment. The cost of compliance with these laws can be significant. Failure to properly handle, transport or dispose of these materials or otherwise conduct our operations in accordance with these and other environmental laws could expose us to substantial liability for administrative, civil and criminal penalties, cleanup and site restoration costs and liability associated with releases of such materials, damages to natural resources and other damages, as well as potentially impair our ability to conduct our operations. Such liability is commonly on a strict, joint and several liability basis, without regard to fault. Liability may be

imposed as a result of our conduct that was lawful at the time it occurred or the conduct of, or conditions caused by, prior operators or other third parties. Neighboring landowners and other third parties may file claims against us for personal injury or property damage allegedly caused by the release of pollutants into the environment. Environmental laws and regulations have changed in the past, and they may change in the future and become more stringent. Current and future claims and liabilities may have a material adverse effect on us because of potential adverse outcomes, defense costs, diversion of management resources, unavailability of insurance coverage and other factors. The ultimate costs of these liabilities are difficult to determine and may exceed any reserves we may have established. If existing environmental requirements or enforcement policies change, we may be required to make significant unanticipated capital and operating expenditures.
The adoption of climate change legislation or regulations restricting emissions of greenhouse gases could result in increased operating costs and reduced demand for oil and natural gas.
The EPA has determined that GHGs present an endangerment to public health and the environment because such gases contribute to warming of the earth’s atmosphere and other climatic changes. Based on these findings, the EPA has adopted and implemented, and continues to adopt and implement, regulations that restrict emissions of GHGs under existing provisions of the Clean Air Act (“CAA”). The EPA also requires the annual reporting of GHG emissions from certain large sources of GHG emissions in the United States, including certain oil and gas production facilities. The EPA has also taken steps to limit methane emissions from oil and gas production facilities. In addition, the U.S. Congress has from time to time considered adopting legislation to reduce emissions of GHGs and almost one‑half of the states have already taken legal measures to reduce emissions of GHGs primarily through the planned development of GHG emission inventories and/or regional GHG cap and trade programs. And in December 2015, the United States joined the international community at the 21st Conference of the Parties of the United Nations Framework Convention on Climate Change in Paris, France. The resulting Paris Agreement calls for the parties to undertake “ambitious efforts” to limit the average global temperature, and to conserve and enhance sinks and reservoirs of greenhouse gases. The Paris Agreement entered into force in November 2016. On June 1, 2017, President Trump announced that the United States planned to withdraw from the Paris Agreement and to seek negotiations either to reenter the Paris Agreement on different terms or establish a new framework agreement. The Paris Agreement provides for a four‑year exit process beginning when it took effect in November 2016, which would resulting in an effective exit date of November 2020. The United States’ adherence to the exit process is uncertain and/or the terms on which the United States may reenter the Paris Agreement or a separately negotiated agreement are unclear at this time.
Moreover, climate change may cause more extreme weather conditions and increased volatility in seasonal temperatures. Extreme weather conditions can interfere with our operations and increase our costs, and damage resulting from extreme weather may not be fully insured.
Federal and state legislative and regulatory initiatives relating to hydraulic fracturing could result in increased costs and additional operating restrictions or delays.
Our hydraulic fracturing operations are a significant component of our business, and it is an important and common practice that is used to stimulate production of hydrocarbons, particularly oil and natural gas, from tight formations, including shales. The process, which involves the injection of water, sand and chemicals under pressure into formations to fracture the surrounding rock and stimulate production, is typically regulated by state oil and natural gas commissions. However, federal agencies have asserted regulatory authority over certain aspects of the process. For example, in May 2014, the EPA issued an Advanced Notice of Proposed Rulemaking seeking comment on the development of regulations under the Toxic Substances Control Act to require companies to disclose information regarding the chemicals used in hydraulic fracturing. Beginning in August 2012, the EPA issued a series of rules under the CAA that establish new emission control requirements for emissions of volatile organic compounds and methane from certain oil and natural gas production and natural gas processing operations and equipment. After several attempts to delay implementation, in September 2018 the EPA issued a proposal to amend and reduce such requirements. In March 2015, the Bureau of Land Management (“BLM”) finalized a rule governing hydraulic fracturing on federal lands. In June 2016, a federal district court judge in Wyoming struck down the final rule, finding that the BLM lacked congressional authority to promulgate the rule. The BLM appealed that ruling. In September 2017, the U.S. Court of Appeals for the Tenth Circuit dismissed the appeal and remanded with

directions to vacate the lower court’s opinion, leaving the final rule in place. The BLM initiated a rulemaking to rescind the final rule in December 2017. Further, legislation to amend the Safe Drinking Water Act to repeal the exemption for hydraulic fracturing (except when diesel fuels are used) from the definition of “underground injection” and require federal permitting and regulatory control of hydraulic fracturing, as well as legislative proposals to require disclosure of the chemical constituents of the fluids used in the fracturing process, have been proposed in recent sessions of Congress. Several states and local jurisdictions in which we or our customers operate also have adopted or are considering adopting regulations that could restrict or prohibit hydraulic fracturing in certain circumstances, impose more stringent operating standards and/or require the disclosure of the composition of hydraulic fracturing fluids.
More recently, federal and state governments have begun investigating whether the disposal of produced water into underground injection wells has caused increased seismic activity in certain areas. In March 2016, the United States Geological Survey identified six states with the most significant hazards from induced seismicity, including Oklahoma, Kansas, Texas, Colorado, New Mexico and Arkansas. The United States Geological Survey also noted the potential for induced seismicity in Ohio and Alabama. In response to concerns regarding induced seismicity, regulators in some states have imposed, or are considering imposing, additional requirements in the permitting of produced water disposal wells or otherwise to assess any relationship between seismicity and the use of such wells. For example, Oklahoma issued new rules for wastewater disposal wells in 2014 that imposed certain permitting and operating restrictions and reporting requirements on disposal wells in proximity to faults and also, from time to time, has developed and implemented plans directing certain wells where seismic incidents have occurred to restrict or suspend disposal well operations. In particular, the Oklahoma Corporation Commission released well completion seismicity guidelines in December 2016 for operators in the SCOOP and STACK that call for hydraulic fracturing operations to be suspended following earthquakes of certain magnitudes in the vicinity. In addition, in February 2017, the Oklahoma Corporation Commission’s Oil and Gas Conservation Division issued an order limiting future increases in the volume of oil and natural gas wastewater injected into the ground in an effort to reduce the number of earthquakes in the state. The Texas Railroad Commission adopted similar rules in 2014. In addition, in December 2016, the EPA released its final report regarding the potential impacts of hydraulic fracturing on drinking water resources, concluding that “water cycle” activities associated with hydraulic fracturing may impact drinking water resources under certain circumstances such as water withdrawals for fracturing in times or areas of low water availability, surface spills during the management of fracturing fluids, chemicals or produced water, injection of fracturing fluids into wells with inadequate mechanical integrity, injection of fracturing fluids directly into groundwater resources, discharge of inadequately treated fracturing wastewater to surface waters, and disposal or storage of fracturing wastewater in unlined pits. The results of these studies could lead federal and state governments and agencies to develop and implement additional regulations.
Increased regulation of hydraulic fracturing and related activities (whether as a result of the EPA study results or resulting from other factors) could subject us and our customers to additional permitting and financial assurance requirements, more stringent construction specifications, increased monitoring, reporting and recordkeeping obligations, and plugging and abandonment requirements. New requirements could result in increased operational costs for us and our customers, and reduce the demand for our services.
Conservation measures, commercial development and technological advances could reduce demand for oil and natural gas and our services.
Fuel conservation measures, alternative fuel requirements, increasing consumer demand for alternatives to oil and natural gas, technological advances in fuel economy and energy generation devices could reduce demand for oil and natural gas, resulting in reduced demand for oilfield services. The impact of the changing demand for oil and natural gas services and products may have a material adverse effect on our business, financial condition, results of operations and cash flows.
The commercial development of economically‑viable alternative energy sources and related products (such as electric vehicles, wind, solar, geothermal, tidal, fuel cells and biofuels) could have a similar effect. In addition, certain U.S. federal income tax deductions currently available with respect to oil and natural gas exploration and development, including the allowance of percentage depletion for oil and natural gas properties, may be eliminated as a result of proposed legislation. Any future decreases in the rate at which oil and natural gas reserves are

discovered or developed, whether due to the passage of legislation, increased governmental regulation leading to limitations, or prohibitions on exploration and drilling activity, including hydraulic fracturing, or other factors, could have a material adverse effect on our business and financial condition, even in a stronger oil and natural gas price environment.
We may be subject to claims for personal injury and property damage, which could materially adversely affect our financial condition and results of operations.
We operate with most of our customers under master service agreements or MSAs.("MSAs"). We endeavor to allocate potential liabilities and risks between the parties in the MSAs. Generally, under our MSAs, including those relating to our hydraulic fracturing services, we assume responsibility for, including control and removal of, pollution or contamination which originates above surface and originates from our equipment or services. Our customer assumes responsibility for, including control and removal of, all other pollution or contamination which may occur during operations, including that which may result from seepage or any other uncontrolled flow of drilling fluids. We may have liability in such cases if we are negligent or commit willful acts. Generally, our customers also agree to indemnify us against claims arising from their employees’ personal injury or death to the extent that, in the case of our hydraulic fracturing operations, their employees are injured or their properties are damaged by such operations, unless resulting from our gross negligence or willful misconduct. Similarly, we generally agree to indemnify our customers for liabilities arising from personal injury to or death of any of our employees, unless resulting from gross negligence or willful misconduct of the customer. In addition, our customers generally agree to indemnify us for loss or destruction of customer‑owned property or equipment and in turn, we agree to indemnify our customers for loss or destruction of property or equipment we own. Losses due to catastrophic events, such as blowouts, are generally the responsibility of the customer. However, despite this general allocation of risk, we might not succeed in enforcing such contractual allocation, might incur an unforeseen liability
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falling outside the scope of such allocation or may be required to enter into an MSA with terms that vary from the above allocations of risk. Litigation arising from a catastrophic occurrence at a location where our equipment and services are being used may result in our being named as a defendant in lawsuits asserting large claims. As a result, we may incur substantial losses which could materially and adversely affect our financial condition and results of operation.
We are subject to cyber security risks. A cyber incident could occur and result in information theft, data corruption, operational disruption and/or financial loss.
The oil and natural gas industry has become increasingly dependent on digital technologies to conduct certain processing activities. For example, we depend on digital technologies to perform many of our services and process and record operational and accounting data. At the same time, cyber incidents, including deliberate attacks or unintentional events, have increased. The U.S. government has issued public warnings that indicateindicating that energy assets might be specific targets of cyber security threats. Our technologies, systems and networks, and those of our vendors, suppliers and other business partners, may become the target of cyberattacks or information security breaches that could result in the unauthorized release, gathering, monitoring, misuse, loss or destruction of proprietary information, personal information and other data, or other disruption of our business operations. In addition, certain cyber incidents, such as unauthorized surveillance, may remain undetected for an extended period. Our systems and insurance coverage for protecting against cyber security risks, including cyberattacks, may not be sufficient and may not protect against or cover all of the losses we may experience as a result of the realization of such risks. As cyber incidents continue to evolve, we may be required to expend additional resources to continue to modify or enhance our protective measures or to investigate and remediate the effects of cyber incidents.
Our certificate of incorporation and bylaws, as well as Delaware law, contain provisions that could discourage acquisition bids or merger proposals, which may adversely affect the market price of our common stock.
Our certificate of incorporation authorizes our board of directors to issue preferred stock without shareholder approval. If our board of directors elects to issue preferred stock, it could be more difficult for a third party to acquire us. In addition, some provisions of our certificate of incorporation and bylaws could make it more difficult for a third party to acquire control of us, even if the change of control would be beneficial to our shareholders, including:

limitations on the removal of directors;
limitations on the ability of our shareholders to call special meetings;
advance notice provisions for shareholder proposals and nominations for elections to the board of directors to be acted upon at meetings of shareholders;
providing that the board of directors is expressly authorized to adopt, or to alter or repeal our bylaws; and
establishing advance notice and certain information requirements for nominations for election to our board of directors or for proposing matters that can be acted upon by shareholders at shareholder meetings.
We may grow through acquisitions and our failure to properly plan and manage those acquisitions may adversely affect our performance.
We have completed and may in the future pursue, asset acquisitions or acquisitions of businesses. Any acquisition of assets or businesses involves potential risks, including the failure to realize expected profitability, growth or accretion; environmental or regulatory compliance matters or liability; title or permit issues; the incurrence of significant charges, such as impairment of goodwill, or property plant and equipment or restructuring charges; and the incurrence of unanticipated liabilities and costs for which indemnification is unavailable or inadequate. The process of upgrading acquired assets to our specifications and integrating acquired assets or businesses may also involve unforeseen costs and delays or other operational, technical and financial difficulties and may require a significant amount of time and resources and may divert management’s attention from existing operations or other priorities.
We must plan and manage any acquisitions effectively to achieve revenue growth and maintain profitability in our evolving market. Any failure to manage acquisitions effectively or integrate acquired assets or businesses into our existing operations successfully, or to realize the expected benefits from an acquisition or minimize any unforeseen operational difficulties, could have a material adverse effect on our business, financial condition, prospects or results of operations.
The Logan Lawsuit could have a material adverse effect on our business, financial condition, results of operation, and cash flows.
          In September 2019, a complaint, captioned Richard Logan, Individually and On Behalf of All Others Similarly Situated, Plaintiff, v. ProPetro Holding Corp., et al., (the "Logan Lawsuit"), was filed against the Company and certain of its then current and former officers and directors in the U.S. District Court for the Western District of Texas.
          In July 2020, the Logan Lawsuit Lead Plaintiffs Nykredit Portefølje Administration A/S, Oklahoma Firefighters Pension and Retirement System, Oklahoma Law Enforcement Retirement System, Oklahoma Police Pension and Retirement System, and Oklahoma City Employee Retirement System, and additional named plaintiff Police and Fire Retirement System of the City of Detroit, individually and on behalf of a putative class of shareholders who purchased the Company’s common stock between March 17, 2017 and March 13, 2020, filed a third amended class action complaint in the U.S. District Court for the Western District of Texas, alleging violations of Sections 10(b) and 20(a) of the Exchange Act, as amended, and Rule l0b-5 promulgated thereunder, and Sections 11 and 15 of the Securities Act of 1933, as amended, based on allegedly inaccurate or misleading statements, or omissions of material facts, about the Company’s business, operations and prospects against the Company, certain former officers and current and former directors. On September 13, 2021, the Court partially granted and partially denied motions to dismiss filed by the Company and the individual defendants. Discovery is still ongoing.
          In May 2020, the U.S. District Court for the Western District of Texas consolidated two shareholder derivative lawsuits previously filed against the Company and certain of its current and former officers and directors into a single lawsuit captioned In re ProPetro Holding Corp. Derivative Litigation (the "Shareholder Derivative Lawsuit"). In August
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2020, the plaintiffs in the Shareholder Derivative Lawsuit filed a consolidated complaint alleging (i) breaches of fiduciary duties, (ii) unjust enrichment and (iii) contribution. The plaintiffs did not quantify any alleged damages in their complaint but, in addition to attorneys’ fees and costs, they seek various forms of relief, including (i) damages sustained by the Company as a result of the alleged misconduct, (ii) punitive damages and (iii) equitable relief in the form of improvements to the Company’s governance and controls. On September 15, 2021, the Court granted the Company's motion to dismiss the complaint in its entirety, without prejudice.
          On November 19, 2021, the Company received a demand letter from a law firm representing one of the purported shareholders of the Company that previously filed the dismissed Shareholder Derivative Lawsuit. The demand letter alleged facts and claims substantially similar to the Shareholder Derivative Lawsuit. The Board of Directors has constituted a committee to evaluate the demand letter and recommend a course of action to the Board of Directors, and the committee has retained counsel to assist with its review. The committee’s review is ongoing.

          We are presently unable to predict the duration, scope or result of the Logan Lawsuit or any other related lawsuit or investigation. As of December 31, 2021, no provision was made by the Company in connection with this pending lawsuit as the final outcome cannot be reasonably estimated.
          The ongoing Logan Lawsuit and any related future litigation give rise to risks and uncertainties that could adversely affect our business, results of operations and financial condition. Such risks and uncertainties include, but are not limited to, uncertainty as to the scope, timing and ultimate outcome of the lawsuit, including the potential impact to the Company in the event of an adverse outcome and on the market price of the Company’s common stock; the costs and expenses of the Logan Lawsuit including legal fees and possible settlement in the event of an adverse outcome; the risk of additional potential litigation or regulatory action arising from matters relating to this lawsuit.
          The outcome of the Logan Lawsuit and any other litigation is necessarily uncertain. We could be forced to expend significant resources in the defense of this lawsuit or future ones, and we may not prevail.
          We maintain director and officer insurance; however, our insurance coverage is subject to certain exclusions (including, for example, any required SEC disgorgement or penalties) and we are responsible for meeting certain deductibles under the policies. Moreover, we cannot assure you that our insurance coverage will adequately protect us from claims made in the Logan Lawsuit. Further, as a result of the pending litigation and investigation the costs of insurance may increase and the availability of coverage may decrease. As a result, we may not be able to maintain our current levels of insurance at a reasonable cost, or at all.
Risks Related to Customers, Suppliers and Competition
Reliance upon a few large customers may adversely affect our revenue and operating results.
          The majority of our revenue is generated from our hydraulic fracturing services. Due to the large percentage of our revenue historically derived from our hydraulic fracturing services with recurring customers and the limited availability of our fracturing units, we have had some degree of customer concentration. Our top ten customers represented approximately 91.4%, 97.3% and 95.5% of our consolidated revenue for the years ended December 31, 2021, 2020 and 2019, respectively. It is likely that we will depend on a relatively small number of customers for a significant portion of our revenue in the future. If a major customer fails to pay us, revenue would be impacted and our operating results and financial condition could be harmed.
          Additionally, if we were to lose any material customer, we may not be able to redeploy our equipment at similar utilization or pricing levels and such loss could have an adverse effect on our business until the equipment is redeployed at similar utilization or pricing levels.One customer, Pioneer, accounted for 54.2% of our revenue for the year ended December 31, 2021. The revenue generated from our relationship with Pioneer is largely derived from pressure pumping and related services provided pursuant to the Pressure Pumping Services Agreement (the "Pioneer Services Agreement"). Although the Pioneer Services Agreement provides for the provision of services for a term of up to 10 years, Pioneer has the right to terminate the Pioneer Services Agreement in its sole discretion, in whole or part, effective as of December 31 of each of the calendar years of 2022, 2024 and 2026. While management believes our relationship with Pioneer will continue beyond December 31, 2022, if Pioneer elects to terminate the Pioneer Services Agreement effective December 31, 2022, or seeks to renegotiate the terms on which we provide services to Pioneer, it could have a material adverse effect on our financial condition, results of operations and cash flows.
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We face significant competition that may cause us to lose market share, and competition in our industry has intensified during the industry downturn.
          The oilfield services industry is highly competitive and has relatively few barriers to entry. The principal competitive factors impacting sales of our services are price, reputation and technical expertise, equipment and service quality and health and safety standards. The market is also fragmented and includes numerous small companies capable of competing effectively in our markets on a local basis, as well as several large companies that possess substantially greater financial and other resources than we do. Our larger competitors’ greater resources could allow those competitors to compete more effectively than we can. For instance, our larger competitors may offer services at below‑market prices or bundle ancillary services at no additional cost to our customers. We compete with large national and multi‑national companies that have longer operating histories, greater financial, technical and other resources and greater name recognition than we do. Several of our competitors provide a broader array of services and have a stronger presence in more geographic markets. In addition, we compete with several smaller companies capable of competing effectively on a regional or local basis.
          Some jobs are awarded on a bid basis, which further increases competition based on price. Pricing is often the primary factor in determining which qualified contractor is awarded a job. The competitive environment may be further intensified by tighter emissions standards in the energy industry and mergers and acquisitions among oil and natural gas companies or other events that have the effect of reducing the number of available customers. As a result of competition, we may lose customers or customer work and lose market share or be unable to maintain or increase prices for our present services or to acquire additional business opportunities, which could have a material adverse effect on our business, financial condition, results of operations and cash flows.
          Our competitors may be able to respond more quickly to new or emerging technologies and services and changes in customer requirements. The amount of equipment available may exceed demand, which could result in active price competition. In addition, some exploration and production companies have commenced completing their wells using their own hydraulic fracturing equipment and personnel. Any increase in the development and utilization of in‑house fracturing capabilities by our customers could decrease the demand for our services and have a material adverse impact on our business.
          Pressure on pricing for our services resulting from the industry downturn has impacted, and may continue to impact, our ability to maintain utilization and pricing for our services or implement price increases. During periods of declining pricing for our services, we may not be able to reduce our costs accordingly, which could further adversely affect our results of operations. Also, we may not be able to successfully increase prices without adversely affecting our utilization levels. The inability to maintain our utilization and pricing levels, or to increase our prices as costs increase, could have a material adverse effect on our business, financial condition and results of operations.
          Furthermore, competition among oilfield services and equipment providers is affected by each provider’s reputation for safety and quality. We cannot assure that we will be able to maintain our competitive position.
We are exposed to the credit risk of our customers, and any material nonpayment or nonperformance by our customers could adversely affect our business, results of operations and financial condition.
          We are subject to the risk of loss resulting from nonpayment or nonperformance by our customers. Our credit procedures and policies may not be adequate to fully eliminate customer credit risk. If we fail to adequately assess the creditworthiness of existing or future customers or unanticipated deterioration in their creditworthiness, any resulting increase in nonpayment or nonperformance by them and our inability to re‑market or otherwise use the production could have a material adverse effect on our business, results of operations and financial condition. In weak economic environments, we may experience increased delays and failures to pay due to, among other reasons, a reduction in our customers’ cash flow from operations and their access to the credit markets or other sources of capital. The unpredictable nature of oil and gas prices in recent years and the economic disruption from the COVID-19 pandemic may have negatively impacted the financial condition and liquidity of some of our customers, and future declines or continued volatility could impact their ability to meet their financial obligations to us. If our customers delay paying or fail to pay us a significant amount of our outstanding receivables, it could have a material adverse effect on our liquidity, results of operations, and financial condition.
Our business depends upon the ability to obtain specialized equipment, parts and key raw materials, including sand and chemicals, from third‑party suppliers, and we may be vulnerable to delayed deliveries and future price increases.
          We purchase specialized equipment, parts and raw materials (including, for example, frac sand, chemicals and fluid ends) from third party suppliers and affiliates. In some cases, our customers are responsible for supplying necessary raw
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materials (including frac sand), parts and/or equipment. At times during the business cycle, there is a high demand for hydraulic fracturing and other oilfield services and extended lead times to obtain equipment and raw materials needed to provide these services. For example, in 2021, we have seen significant disruption in supply chains around the world caused by the COVID-19 pandemic that have impacted our operations. Should our current suppliers (or our customers’ suppliers where applicable) be unable or unwilling to provide the necessary equipment, parts or raw materials or otherwise fail to deliver the products timely and/or in the quantities required, any resulting delays in the provision of our services could have a material adverse effect on our business, financial condition, results of operations and cash flows. In addition, future price increases for this type of equipment, parts and raw materials could negatively impact our ability to purchase new equipment, to update or expand our existing fleets, to timely repair equipment in our existing fleets or meet the current demands of our customers.
We may be required to pay fees to certain of our sand suppliers based on minimum volumes under long-term contracts regardless of actual volumes received.
          We enter into purchase agreements with sand suppliers (the "Sand suppliers") to secure supply of sand in the normal course of our business. The agreements with the Sand suppliers require that we purchase minimum volume of sand, based primarily on a certain percentage of our sand requirements from our customers or in certain situations based on predetermined fixed minimum volumes, otherwise certain penalties (shortfall fees) may be charged. The shortfall fee represents liquidated damages and is either a fixed percentage of the purchase price for the minimum volumes or a fixed price per ton of unpurchased volumes. Our current agreements with Sand suppliers expire at different times prior to December 31, 2025.
Risks Related to Employees
We rely on a few key employees whose absence or loss could adversely affect our business.
          Many key responsibilities within our business have been assigned to a small number of employees. The loss of their services could adversely affect our business. In particular, the loss of the services of one or more members of our executive team, such as our Chief Executive Officer, President and Chief Operating Officer, Chief Financial Officer, Chief Accounting Officer and General Counsel could disrupt our operations. We do not maintain "key person" life insurance policies on any of our employees. As a result, we are not insured against any losses resulting from the death of our key employees.
If we are unable to employ a sufficient number of skilled and qualified workers, our capacity and profitability could be diminished and our growth potential could be impaired.
          The delivery of our services requires skilled and qualified workers with specialized skills and experience who can perform physically demanding work. As a result of the volatility of the oilfield services industry and the demanding nature of the work, workers may choose to pursue employment in fields that offer a less challenging work environment at wage rates that are competitive. Our ability to be productive and profitable will depend upon our ability to employ and retain skilled workers. In addition, our ability to expand our operations depends in part on our ability to increase the size of our skilled workers. As a result of the COVID-19 pandemic, we have experienced difficulties in attracting and retaining skilled workers. If demand for our services increases, we may experience difficulty in hiring or re-hiring skilled and unskilled workers in the future to meet that demand. At times, the demand for skilled workers in our geographic areas of operations is high, and the supply is limited. As a result, competition for experienced oilfield services personnel is intense, and we face significant challenges in competing for crews and management with large and well‑established competitors. A significant increase in the wages paid by competing employers could result in a reduction of our skilled labor force, increases in the wage rates that we must pay, or both. Furthermore, if we are unable to adjust wages to account for rapidly rising inflationary cost, there could be a reduction in the available skilled labor force we could attract or retain. If any of these events were to occur, our capacity and profitability could be diminished and our growth potential could be impaired.
Risks Related to Regulatory Matters
We are subject to environmental laws and regulations, and future compliance, claims, and liabilities relating to such matters may have a material adverse effect on our results of operations, financial position or cash flows.
          The nature of our operations, including the handling, storing, transporting and disposing of a variety of fluids and substances, including hydraulic fracturing fluids, which can contain substances such as hydrochloric acid, and other regulated substances, air emissions and wastewater discharges exposes us to some risks of environmental liability, including the release of pollutants from oil and natural gas wells and associated equipment to the environment. The cost of compliance with these laws can be significant. Failure to properly handle, transport or dispose of these materials or
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otherwise conduct our operations in accordance with these and other environmental laws could expose us to substantial liability for administrative, civil and criminal penalties, cleanup and site restoration costs and liability associated with releases of such materials, damages to natural resources and other damages, as well as potentially impair our ability to conduct our operations. Such liability is commonly on a strict, joint and several liability basis, without regard to fault. Liability may be imposed as a result of our conduct that was lawful at the time it occurred or the conduct of, or conditions caused by, prior operators or other third parties. Neighboring landowners and other third parties may file claims against us for personal injury or property damage allegedly caused by the release of pollutants into the environment. Environmental laws and regulations have changed in the past, and they may change in the future and become more stringent. For example, following the election of President Biden and Democratic control in both houses of Congress, President Biden has made climate change a focus of his administration. For more information, see our risk factor titled, “Our and our customers’ operations are subject to a series of risks arising out of the threat of climate change that could result in increased operating costs, limit the areas in which oil and natural gas production may occur, and reduce demand for the products and services we provide.” Separately, current and future claims and liabilities may have a material adverse effect on us because of potential adverse outcomes, defense costs, diversion of management resources, unavailability of insurance coverage and other factors. The ultimate costs of these liabilities are difficult to determine and may exceed any reserves we may have established. If existing environmental requirements or enforcement policies change, we may be required to make significant unanticipated capital and operating expenditures.
Our and our customers’ operations are subject to a series of risks arising out of the threat of climate change that could result in increased operating costs, limit the areas in which oil and natural gas production may occur, and reduce demand for the products and services we provide.
          The threat of climate change continues to attract considerable attention in the United States and in foreign countries. Numerous proposals have been made and could continue to be made at the international, national, regional and state levels of government to monitor and limit existing emissions of GHGs as well as to restrict or eliminate future GHG emissions. As a result, our operations as well as the operations of our oil and natural gas exploration and production customers are subject to a series of regulatory, political, litigation, and financial risks associated with the production and processing of fossil fuels and emission of GHGs.
          In the United States, no comprehensive climate change legislation has been implemented at the federal level. However, following the U.S. Supreme Court finding that GHG emissions constitute a pollutant under the CAA, the EPA has adopted regulations that, among other things, establish construction and operating permit reviews for GHG emissions from certain large stationary sources, require the monitoring and annual reporting of GHG emissions from certain petroleum and natural gas system sources in the United States and together with the DOT, implementing GHG emissions limits on vehicles manufactured for operation in the United States. In September 2020, the Trump Administration revised prior regulations to rescind certain methane standards and remove the transmission and storage segment from the oil and natural gas source category and rescinded the methane-segments from the source category for certain regulations. However, subsequently, the U.S. Congress approved, and President Biden signed into law, a resolution under the Congressional Review Act to repeal the September 2020 revisions to the methane standards, effectively reinstating the prior standards. Additionally, in November 2021, the EPA issued a proposed rule that, if finalized, would establish OOOO(b) new source and OOOO(c) first-time existing source standards of performance for methane and volatile organic compound emissions for oil and gas facilities. Operators of affected facilities will have to comply with specific standards of performance to include leak detection using optical gas imaging and subsequent repair requirement, and reduction of emissions by 95% through capture and control systems. The EPA plans to issue a supplemental proposal in 2022 containing additional requirements not included in the November 2021 proposed rule and anticipates the issuance of a final rule by the end of the year.
          Additionally, various states and groups of states have adopted or are considering adopting legislation, regulations or other regulatory initiatives that are focused on such areas GHG cap and trade programs, carbon taxes, reporting and tracking programs, and restriction of emissions. At the international level, the United Nations-sponsored "Paris Agreement," requires member states to submit non-binding, individually-determined reduction goals known as NDC’s every five years after 2020. Following President Biden’s executive order in January 2021, the United States rejoined the Paris Agreement and, in April 2021, established a goal of reducing economy-wide net GHG emissions 50-52% below 2005 levels by 2030. Additionally, at the COP26 in Glasgow in November 2021, the United States and the European Union jointly announced the launch of a Global Methane Pledge; an initiative committing to a collective goal of reducing global methane emissions by at least 30 percent from 2020 levels by 2030, including “all feasible reductions” in the energy sector. However, the impacts of these actions are unclear at this time.
           Governmental, scientific, and public concern over the threat of climate change arising from GHG emissions has resulted in increasing political risks in the United States, including climate-change-related pledges made by certain
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candidates for public office. On January 27, 2021, President Biden issued an executive order that commits to substantial action on climate change, calling for, among other things, the increased use of zero-emissions vehicles by the federal government, the elimination of subsidies provided to the fossil fuel industry, and an increased emphasis on climate-related risk across government agencies and economic sectors. The executive order also suspends the issuance of new leases for oil and gas development on federal land; for more information, see our regulatory disclosure titled “Regulation of Hydraulic Fracturing and Related Activities. Other actions that the Biden Administration may take include the imposition of more restrictive requirements for the development of pipeline infrastructure or LNG export facilities, or more restrictive GHG emissions limitations for oil and gas facilities. Litigation risks are also increasing as a number of cities and other local governments have sought to bring suit against certain oil and natural gas companies operating in the United States in state or federal court, alleging among other things, that such companies created public nuisances by producing fuels that contributed to climate change or that such companies have been aware of the adverse effects of climate change but failed to adequately disclose those impacts to their investors or customers.
          There are also increasing financial risks for companies in the fossil fuel sector as shareholders currently invested in fossil-fuel energy companies concerned about the potential effects of climate change may elect in the future to shift some or all of their investments into non-fossil fuel related sectors. Institutional lenders who provide financing to fossil-fuel energy companies also have become more attentive to sustainable lending practices and some of them may elect not to provide funding for fossil fuel energy companies. For example, at COP26, the Glasgow Financial Alliance for Net Zero ("GFANZ") announced that commitments from over 450 firms across 45 countries had resulted in over $130 trillion in capital committed to net zero goals. The various sub-alliances of GFANZ generally require participants to set short-term, sector-specific targets to transition their financing, investing, and/or underwriting activities to net zero emissions by 2050. There is also a risk that financial institutions will be required to adopt policies that have the effect of reducing the funding provided to the fossil fuel sector. In late 2020, the Federal Reserve announced that it has joined the Network for Greening the Financial System ("NGFS"), a consortium of financial regulators focused on addressing climate-related risks in the financial sector. Subsequently, the Federal Reserve has issued a statement in support of the efforts of the NGFS to identify key issues and potential solutions for the climate-related challenges most relevant to central banks and supervisory authorities. Limitation of investments in and financings for fossil fuel energy companies could result in the restriction, delay or cancellation of drilling programs or development or production activities. Additionally, the United States Securities and Exchange Commission has announced an intention to promulgate rules requiring climate disclosures. Although the form and substance of these requirements is not yet known, this may result in additional costs to comply with any such disclosure requirements.
          The adoption and implementation of new or more stringent international, federal or state legislation, regulations or other regulatory initiatives that impose more stringent standards for GHG emissions from the oil and natural gas sector or otherwise restrict the areas in which this sector may produce oil and natural gas or generate GHG emissions could result in increased costs of compliance or costs of consuming, and thereby reduce demand for, oil and natural gas, which could reduce demand for our services and products. Additionally, political, litigation and financial risks may result in our oil and natural gas customers restricting or cancelling production activities, incurring liability for infrastructure damages as a result of climatic changes, or impairing their ability to continue to operate in an economic manner, which also could reduce demand for our services and products. One or more of these developments could have a material adverse effect on our business, financial condition and results of operation
          Moreover, climate change may result in various physical risks, such as the increased frequency or intensity of extreme weather events or changes in meteorological and hydrological patterns, that could adversely impact us, our customers’ and our suppliers’ operations. Such physical risks may result in damage to our customers’ facilities or otherwise adversely impact our operations, such as if facilities are subject to water use curtailments in response to drought, or demand for our customers’ products, such as to the extent warmer winters reduce the demand for energy for heating purposes, which may ultimately reduce demand for the products and services we provide. Such physical risks may also impact our suppliers, which may adversely affect our ability to provide our products and services. Extreme weather conditions can interfere with our operations and increase our costs, and damage resulting from extreme weather may not be fully insured.
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Federal and state legislative and regulatory initiatives relating to hydraulic fracturing could result in increased costs and additional operating restrictions or delays.
          Our hydraulic fracturing operations are a significant component of our business, and it is an important and common practice that is used to stimulate production of hydrocarbons, particularly oil and natural gas, from tight formations, including shales. The process, which involves the injection of water, sand and chemicals under pressure into formations to fracture the surrounding rock and stimulate production, is typically regulated by state oil and natural gas commissions. However, federal agencies have asserted regulatory authority over certain aspects of the process. For example, the EPA has previously issued a series of rules under the CAA that establish new emission control requirements for emissions of volatile organic compounds and methane from certain oil and natural gas production and natural gas processing operations and equipment. Separately, the BLM finalized a rule governing hydraulic fracturing on federal lands but this rule was subsequently rescinded. Although several of these rulemakings have been rescinded, modified or subjected to legal challenges, new or more stringent regulations may be promulgated by the Biden Administration. For example, in January 2021, President Biden issued an executive order suspending new leasing activities, but not operations under existing leases, for oil and gas exploration and production on non-Indian federal lands pending completion of a comprehensive review and reconsideration of federal oil and gas permitting and leasing practices that take into consideration potential climate and other impacts associated with oil and gas activities on such lands and waters. Although the federal court for the Western District of Louisiana issued a preliminary injunction against the leasing pause, in response to the executive order, the DOI issued a report recommending various changes to the federal leasing program, though many such changes would require Congressional action. As a result, we cannot predict the final scope of regulations or restrictions that may apply to oil and gas operations on federal lands. However, any regulations that ban or effectively ban such operations may adversely impact demand for our products and services. Further, legislation to amend the Safe Drinking Water Act to repeal the exemption for hydraulic fracturing (except when diesel fuels are used) from the definition of “underground injection” and require federal permitting and regulatory control of hydraulic fracturing, as well as legislative proposals to require disclosure of the chemical constituents of the fluids used in the fracturing process, have been proposed in recent sessions of Congress. Several states and local jurisdictions in which we or our customers operate also have adopted or are considering adopting regulations that could restrict or prohibit hydraulic fracturing in certain circumstances, impose more stringent operating standards and/or require the disclosure of the composition of hydraulic fracturing fluids.
          Federal and state governments have also investigated whether the disposal of produced water into underground injection wells has caused increased seismic activity in certain areas. In response to concerns regarding induced seismicity, regulators in some states have imposed, or are considering imposing, additional requirements in the permitting of produced water disposal wells or otherwise to assess any relationship between seismicity and the use of such wells. For example, Oklahoma has issued rules for wastewater disposal wells in 2014 that imposed certain permitting and operating restrictions and reporting requirements on disposal wells in proximity to faults and also, from time to time, has implemented plans directing certain wells where seismic incidents have occurred to restrict or suspend disposal well operations. In particular, the Oklahoma Corporation Commission released well completion seismicity guidelines for operators in the SCOOP and STACK require hydraulic fracturing operations to be suspended following earthquakes of certain magnitudes in the vicinity. In addition, the Oklahoma Corporation Commission’s Oil and Gas Conservation Division has previously issued an order limiting future increases in the volume of oil and natural gas wastewater injected into the ground in an effort to reduce the number of earthquakes in the state. The TRRC has adopted similar rules and, in September 2021, issued a notice to disposal well operators in the Gardendale Seismic Response Area near Midland, Texas to reduce daily injection volumes following multiple earthquakes above a 3.5 magnitude over an 18 month period. The notice also required disposal well operators to provide injection data to TRRC staff to further analyze seismicity in the area. Subsequently, the TRRC ordered the indefinite suspension of all deep oil and gas produced water injection wells in the area, effective December 31, 2021. While we cannot predict the ultimate outcome of these actions, any action that temporarily or permanently restricts the availability of disposal capacity for produced water or other oilfield fluids may increase our customers’ costs or require them to suspend operations, which may adversely impact demand for our products and services
          Increased regulation of hydraulic fracturing and related activities could subject us and our customers to additional permitting and financial assurance requirements, more stringent construction specifications, increased monitoring, reporting and recordkeeping obligations, and plugging and abandonment requirements. New requirements could result in increased operational costs for us and our customers, and reduce the demand for our services.
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Increasing trucking regulations may increase our costs and negatively impact our results of operations.
          In connection with our business operations, including the transportation and relocation of our hydraulic fracturing equipment and shipment of frac sand, we operate trucks and other heavy equipment. As such, we operate as a motor carrier in providing certain of our services and therefore are subject to regulation by the DOT and by various state agencies. These regulatory authorities exercise broad powers, governing activities such as the authorization to engage in motor carrier operations, driver licensing, insurance requirements, financial reporting and review of certain mergers, consolidations and acquisitions, and transportation of hazardous materials. Our trucking operations are subject to possible regulatory and legislative changes that may increase our costs. Some of these possible changes include increasingly stringent environmental regulations, changes in the hours of service regulations which govern the amount of time a driver may drive or work in any specific period, onboard black box recorder device requirements or limits on vehicle weight and size.
          Interstate motor carrier operations are subject to safety requirements prescribed by the DOT. To a large degree, intrastate motor carrier operations are subject to state safety regulations that mirror federal regulations. Matters such as the weight and dimensions of equipment are also subject to federal and state regulations. From time to time, various legislative proposals are introduced, including proposals to increase federal, state, or local taxes, including taxes on motor fuels, which may increase our costs or adversely impact the recruitment of drivers. We cannot predict whether, or in what form, any increase in such taxes applicable to us will be enacted.
          Certain motor vehicle operators require registration with the DOT. This registration requires an acceptable operating record. The DOT periodically conducts compliance reviews and may revoke registration privileges based on certain safety performance criteria that could result in a suspension of operations.
Increased attention to environmental, social and governance (“ESG”) matters, conservation measures, commercial development and technological advances could reduce demand for oil and natural gas and our services.
          Fuel conservation measures, alternative fuel requirements, increasing consumer demand for alternatives to oil and natural gas, increased attention to climate change and other ESG matters, and technological advances in fuel economy and energy generation devices could reduce demand for oil and natural gas, resulting in reduced demand for oilfield services. The impact of the changing demand for oil and natural gas services and products may have a material adverse effect on our business, financial condition, results of operations and cash flows.
          The commercial development of economically‑viable alternative energy sources and related products (such as electric vehicles, wind, solar, geothermal, tidal, fuel cells and biofuels) could have a similar effect. In addition, certain U.S. federal income tax deductions currently available with respect to oil and natural gas exploration and development, including the allowance of percentage depletion for oil and natural gas properties, may be eliminated as a result of proposed legislation. Any future decreases in the rate at which oil and natural gas reserves are discovered or developed, whether due to the passage of legislation, increased governmental regulation leading to limitations, or prohibitions on exploration and drilling activity, including hydraulic fracturing, or other factors, could have a material adverse effect on our business and financial condition, even in a stronger oil and natural gas price environment.
Moreover, while we may create and publish voluntary disclosures regarding ESG matters from time to time, certain statements in those voluntary disclosures may be based on hypothetical expectations and assumptions that may or may not be representative of current or actual risks or events or forecasts of expected risks or events, including the costs associated therewith. Such expectations and assumptions are necessarily uncertain and may be prone to error or subject to misinterpretation given the long timelines involved and the lack of an established single approach to identifying, measuring and reporting on many ESG matters. Additionally, we may announce various targets or product and service offerings in an attempt to improve our ESG profile. However, we cannot guarantee that we will be able to meet any such targets or that such targets or offerings will have the intended results on our ESG profile, including but not limited to as a result of unforeseen costs, consequences or technical difficulties associated with such targets or offerings. Also, despite any voluntary actions, we may receive pressure from certain investors, lenders or other groups to adopt more aggressive climate or other ESG-related goals or policies, but we cannot guarantee that we will be able to implement such goals because of potential costs or technical or operational obstacles.
In addition, organizations that provide information to investors on corporate governance and related matters have developed ratings processes for evaluating companies on their approach to ESG matters. Such ratings are used by some investors to inform their investment and voting decisions. Unfavorable ESG ratings and recent activism directed at shifting funding away from companies with energy-related assets could lead to increased negative investor sentiment toward us and our industry and to the diversion of investment to other industries, which could have a negative impact on our stock price and our access to and costs of capital. Additionally, to the extent ESG matters negatively impact our
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reputation, we may not be able to compete as effectively to recruit or retain employees, which may adversely affect our operations.
Certain of our completion services, particularly our hydraulic fracturing services, are substantially dependent on the availability of water. Restrictions on our or our customers’ ability to obtain water may have an adverse effect on our financial condition, results of operations and cash flows.
          Water is an essential component of unconventional shale oil and natural gas production during both the drilling and hydraulic fracturing processes. Over the past several years, certain of the areas in which we and our customers operate have experienced extreme drought conditions and competition for water in such areas is growing. In addition, some state and local governmental authorities have begun to monitor or restrict the use of water subject to their jurisdiction for hydraulic fracturing to ensure adequate local water supply. For instance, some states require E&P companies to report certain information regarding the water they use for hydraulic fracturing and to monitor the quality of groundwater surrounding some wells stimulated by hydraulic fracturing. Generally, our water requirements are met by our customers from sources on or near their sites, but there is no assurance that our customers will be able to obtain a sufficient supply of water from sources in these areas. Our or our customers’ inability to obtain water from local sources or to effectively utilize flowback water could have an adverse effect on our financial condition, results of operations and cash flows.
Risks Related to our Tax Matters
Our ability to use our net operating loss carryforwards may be limited.
As of          The Tax Cuts and Jobs Act (the "TCJA") included a reduction to the maximum deduction allowed for net operating losses generated in tax years after December 31, 2018, we had approximately $516.0 million2017 and the elimination of carrybacks of net operating losses. Under the Coronavirus Aid, Relief, and Economic Security Act, or the CARES Act, which modified the TCJA, U.S. federal net operating loss carryforwards that("NOLs") generated in taxable periods beginning after December 31, 2017, may be carried forward indefinitely, but the deductibility of such NOLs in taxable years beginning after December 31, 2020, is limited to 80% of taxable income. As of December 31, 2021, we had approximately $408.0 million of federal NOLs, some of which will begin to expire in 2032 and2035. Approximately $219.5 million of our federal NOLs relate to pre-2018 periods. As of December 31, 2021, our state net operating losses ofwere approximately $50.0$50.1 million thatand will begin to expire in 2024.
          Utilization of these net operating loss carryforwards (“NOLs”)NOLs depends on many factors, including our future income, which cannot be assured. In addition, Section 382 (“("Section 382”382") of the Internal Revenue Code of 1986, as amended (the “Code”"Code"), generally imposes an annual limitation on the amount of taxable income that may be offset by NOLs when a corporation has undergone an “ownership change”"ownership change" (as determined under Section 382). Generally, a change of more than 50% in the ownership of a corporation’s stock, by value, over a three‑year period constitutes an ownership change for U.S. federal income tax purposes. Any unused annual limitation may, subject to certain limitations, be carried over to later years. We have experiencedmay experience ownership changes, which may result in annual limitation under Section 382 determined by multiplying the value of our stock at the time of the ownership change by the applicable long‑term tax‑exempt rate as defined in Section 382, increased under certain circumstances as a result of recognizing built‑in gains in our assets existing at the time of the ownership change. The limitations arising from ownership changes may prevent utilization of our NOLs prior to their expiration. Future ownership changes or regulatory changes could further limit our ability to utilize our NOLs. To the extent we are not able to offset our future income with our NOLs, this could adversely affect our operating results and cash flows if we attain profitability.
Future regulations relatingRisks Inherent to and interpretationsan Investment in our Common Stock
We are subject to certain requirements of Section 404 of the recently enacted Tax CutsSarbanes-Oxley Act ("Section 404"). If we or our auditors identify and Jobs Actreport material weaknesses in internal control over financial reporting, our investors may lose confidence in our reported information and our stock price may be negatively affected.
          We are required to comply with certain provisions of Section 404, which requires that we document and test our internal control over financial reporting and issue our management’s assessment of our internal control over financial reporting. This section also requires that our independent registered public accounting firm issue an attestation report on such internal control.
          If we or our auditors identify and report material weaknesses in our internal control over financial reporting, the accuracy and timeliness of the filing of our annual and quarterly reports may be materially adversely affected and could cause investors to lose confidence in our reported financial information, which could have a negative effect on the trading price of our common stock. In addition, a material weakness in the effectiveness of our internal control over financial reporting could result in an increased chance of fraud and the loss of customers, reduce our ability to obtain financing and
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require additional expenditures to comply with these requirements, each of which could have a material impactadverse effect on our business, financial condition, and results of operations.
The Tax Cuts and Jobs Act of 2017, or the Tax Act, was signed into law on December 22, 2017. Among other things, the Tax Act reduces the U.S. corporate tax rate from 35% to 21%, imposes significant additional limitations

on the deductibility of interest, and allows the expensing of capital expenditures. The Tax Act is highly complex and subject to interpretation. The presentation of our financial condition and results of operations is based upon our current interpretation of the provisions contained in the Tax Act. The Treasury Department and the Internal Revenue Service continue to release regulations relating to and interpretive guidance of the legislation contained in the Tax Act. Any significant variance of our current interpretation of such legislation from any future regulations or interpretive guidance could result in a change to the presentation of our financial condition andprospects, results of operations and cash flows.
Certain provisions of our certificate of incorporation, and bylaws, as well as Delaware law, may discourage acquisition bids or merger proposals, which may adversely affect the market price of our common stock.
          Our certificate of incorporation authorizes our board of directors (the "Board") to issue preferred stock without shareholder approval. If our Board elects to issue preferred stock, it could be more difficult for a third party to acquire us. In addition, some provisions of our certificate of incorporation and bylaws could make it more difficult for a third party to acquire control of us, even if the change of control would be beneficial to our shareholders, including:
limitations on the removal of directors;
limitations on the ability of our shareholders to call special meetings;
advance notice provisions for shareholder proposals and nominations for elections to the Board to be acted upon at meetings of shareholders;
providing that the Board is expressly authorized to adopt, or to alter or repeal our bylaws; and
establishing advance notice and certain information requirements for nominations for election to our Board or for proposing matters that can be acted upon by shareholders at shareholder meetings.
Our business could be negatively affected as a result of the actions of activist shareholders.
          Publicly traded companies have increasingly become subject to campaigns by investors seeking to increase shareholder value by advocating corporate actions such as financial restructuring, increased borrowing, special dividends, stock repurchases, sales of assets or even sale of the entire company. Given our shareholder composition and other factors, it is possible such shareholders or future activist shareholders may attempt to effect such changes or acquire control over us. Responding to proxy contests and other actions by such activist shareholders or others in the future would be costly and time-consuming, disrupt our operations and divert the attention of our Board and senior management from the pursuit of business strategies, which could adversely affect our business.results of operations and financial condition. Additionally, perceived uncertainties as to our future direction as a result of shareholder activism or changes to the composition of the Board may lead to the perception of a change in the direction of our business, instability or lack of continuity which may be exploited by our competitors, cause concern to our current or potential customers, and make it more difficult to attract and retain qualified personnel. If customers choose to delay, defer or reduce transactions with us or transact with our competitors instead of us because of any such issues, then our business, financial condition, revenues, results of operations and cash flows could be adversely affected.
Our certificate of incorporation designates the Court of Chancery of the State of Delaware as the sole and exclusive forum for certain types of actions and proceedings that may be initiated by our shareholders, which could limit our shareholders’ ability to obtain a favorablepursue actions in another judicial forum for disputes with us or our directors, officers, employees or agents.
Our certificate of incorporation provides that, unless we consent in writing to the selection of an alternative forum, the Court of Chancery of the State of Delaware will, to the fullest extent permitted by applicable law, be the sole and exclusive forum for (i) any derivative action or proceeding brought on our behalf, (ii) any action asserting a claim of breach of a fiduciary duty owed by any of our directors, officers, employees or agents to us or our shareholders, (iii) any action asserting a claim arising pursuant to any provision of the Delaware General Corporation Law (the “DGCL”"DGCL"), our certificate of incorporation or our bylaws, or (iv) any action asserting a claim against us that is governed by the internal affairs doctrine, in each such case subject to such Court of Chancery having personal jurisdiction over the indispensable parties named as defendants therein.
          The exclusive forum provision would not apply to suits brought to enforce any liability or duty created by the Securities Act or the Exchange Act or any other claim for which the federal courts have exclusive jurisdiction. To the extent that any such claims may be based upon federal law claims, Section 27 of the Exchange Act creates exclusive federal jurisdiction over all suits brought to enforce any duty or liability created by the Exchange Act or the rules and regulations thereunder. Furthermore, Section 22 of the Securities Act creates concurrent jurisdiction for federal and state courts over all suits brought to enforce any duty or liability created by the Securities Act or the rules and regulations thereunder.
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          The enforceability of similar choice of forum provisions in other companies’ certificates of incorporation or similar governing documents has been challenged in legal proceedings, and it is possible that a court could find the choice of forum provisions contained in our certificate of incorporation to be inapplicable or unenforceable, including with respect to claims arising under the U.S. federal securities laws.
          Any person or entity purchasing or otherwise acquiring any interest in shares of our capital stock will be deemed to have notice of, and consented to, the provisions of our certificate of incorporation described in the preceding sentence.regarding exclusive forum. This choice of forum provision may limit a shareholder’s ability to bring a claim in a judicial forum that it finds favorable for disputes with us or our directors, officers, employees or agents, which may discourage such lawsuits against us and such persons. Alternatively, if a court were to find these provisions of our certificate of incorporation inapplicable to, or unenforceable in respect of, one or more of the specified types of actions or proceedings, we may incur additional costs associated with resolving such matters in other jurisdictions, which could adversely affect our business, financial condition or results of operations.
We are subject to certain requirements of Section 404 of the Sarbanes-Oxley Act. If we fail to comply with the requirements of Section 404 or if we or our auditors identify and report material weaknesses in internal control over financial reporting, our investors may lose confidence in our reported information and our stock price may be negatively affected.
We are required to comply with certain provisions of Section 404 of the Sarbanes-Oxley Act of 2002, or Section 404. Section 404 requires that we document and test our internal control over financial reporting and issue our management’s assessment of our internal control over financial reporting. This section also requires that our independent registered public accounting firm issue an attestation report on such internal control. If we fail to comply with the requirements of Section 404, or if we or our auditors identify and report material weaknesses in our internal control over financial reporting, the accuracy and timeliness of the filing of our annual and quarterly reports may be materially adversely affected and could cause investors to lose confidence in our reported financial information, which could have a negative effect on the tradingThe market price of our common stock is subject to volatility.
          The market price of our common stock could be subject to wide fluctuations in response to, and the level of trading of our common stock may be affected by, numerous factors, many of which are beyond our control. These factors include, among other things, our limited trading volume, the concentration of holdings or our common stock, actual or anticipated variations in our operating results and cash flow, the nature and content of our earnings releases, announcements or events that impact our products, customers, competitors or markets, business conditions in our markets and the general state of the securities markets, volatility in oil and gas prices and the market for energy-related stocks, as well as general economic and market conditions and other factors that may affect our future results, including those described in this report. Significant sales of our common stock, or the expectation of these sales, by significant shareholders, officers or directors could materially and adversely affect the market price of our common stock.
There may be future sales or other dilution of our equity, which may adversely affect the market price of our common stock.
          We are not restricted from issuing additional common stock, including securities that are convertible into or exchangeable for, or that represent a right to receive, common stock. In addition,Any issuance of additional shares of our common stock or convertible securities will dilute the ownership interest of our common stockholders. Sales of a material weaknesssubstantial number of shares of our common stock or other equity-related securities in the effectivenesspublic market, or the perception that these sales could occur, could depress the market price of our internal control over financial reporting could result in an increased chance of fraudcommon stock and the loss of customers, reduceimpair our ability to obtain financing and requireraise capital through the sale of additional expenditures to comply with these requirements, eachequity securities. We cannot predict the effect that future sales of which couldour common stock or other equity-related securities would have a material adverse effect on the market price of our business, financial condition, prospects, results of operations and cash flows.common stock.

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Item 1B. Unresolved Staff Comments.
None.
Item 2.     Properties
Our corporate headquarters areis located at 1706 S. Midkiff, Bldg. B, Midland, Texas 79701. In addition to our headquarters, we also own and lease other properties that are used for field offices, yards or storage in the Permian Basin. We believe that our facilities are adequate for our current operations.
Item 3.     Legal Proceedings.
          Disclosure concerning legal proceedings is incorporated by reference to "Note 15. Commitments and Contingencies— Contingent Liabilities" of our Consolidated Financial Statements contained in this Annual Report.
From time to time, we may be involvedsubject to various other legal proceedings and claims incidental to or arising in litigation relating to claims arising outthe ordinary course of our operations in the normal course of business. We are not currently a party to any legal proceedings that we believe would have a material adverse effect on our financial position, results of operations or cash flows and are not aware of any material legal proceedings contemplated by governmental authorities.
Item 4.     Mine and Safety Disclosures
None.
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Part II
Item 5.
Item 5.    Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Market Information
On March 22, 2017, we consummated our initial public offering or ("IPO") of our common stock at a price of $14.00 per share. Our common stock is traded on the New York Stock Exchange under the symbol “PUMP.” Prior to our IPO, there was no public market for our stock. We have set forth in the table below the quarterly information with respect to the high and low prices for each quarter in 2018 and 2017.
 Price Per Share
of Common Stock
 
Dividends
Per Share
 High Low 
2018     
Fourth quarter$19.61
 $11.68
 N/A
Third quarter$17.33
 $14.54
 N/A
Second quarter$20.49
 $14.20
 N/A
First quarter$22.49
 $15.25
 N/A
 Price Per Share
of Common Stock
 
Dividends
Per Share
 High Low 
2017     
Fourth quarter$20.49
 $13.81
 N/A
Third quarter$14.48
 $10.92
 N/A
Second quarter$14.70
 $11.93
 N/A
First quarter$14.50
 $12.47
 N/A

“PUMP”.
Holders
As of December 31, 2018,2021, there were 100,190,126 103,437,177 shares of common stock outstanding, held of record by 4six holders. The number of record holders of our common stock does not include DTCDepository Trust Company participants or beneficial owners holding shares through nominee names.
Dividend
We do not anticipate declaring or paying any cash dividends to holders of our common stock in the foreseeable future. We currently intend to retain future earnings, if any, to finance the growth of our business.business and repay borrowings under our ABL Credit Facility, if any. Our future dividend policy is within the discretion of our board of directorsBoard and will depend upon then‑existing conditions, including our results of operations, financial condition, capital requirements, investment opportunities, statutory restrictions on our ability to pay dividends and other factors our board of directorsBoard may deem relevant. In addition, our ABL Credit Facility places certain restrictions on our ability to pay cash dividends.
Equity Compensation Plan Information
The following table sets forth our issuance of awards under our 2013 Stock Option Plan and 2017 Incentive Award Plan as of December 31, 2018:
Plan Category Number of securities to be issued upon exercise of outstanding options, warrants and rights (1) Weighted average exercise price of outstanding options, warrants and rights Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column (a))
  (a) (b) (c)
Equity compensation plans approved by security holders 5,727,911
 5.14
 3,874,852
Equity compensation plans not approved by security holders N/A
 N/A
 N/A
Total 5,727,911
 5.14
 3,874,852
___________________
(1)    Includes 3,802,763 option awards under the 2013 Stock Option Plan, and 754,423 option awards, 473,505 restricted share unit awards and 697,220 performance stock unit awards (assuming achievement of maximum payout) that have been granted under the 2017 Incentive Award Plan. The weighted average exercise price in column (b) does not take the restricted share unit awards or performance stock unit awards into account.
Performance Graph
The quarterly changes for the periods shown in the following graph are based on the assumption that $100 had been invested in our common stock, the Russell 2000 Index (“("Russell 2000”2000") and a self-constructed peer group Indexindex of comparable companies (“("Peer Group”Group") on March 17, 2017 (the first trading date of our common stock), and that all dividends were reinvested at the closing prices of the dividend payment dates. The relevant companies included in our Peer Group consists of Keane Group, Inc., RPC, Inc., C&J EnergyLiberty Oilfield Services Inc., Basic Energy Services,Nextier Oilfield Solutions Inc., RPC, Inc., Calfrac Well Services Ltd., Patterson-UTI Energy, Inc., Superior Energy Services, Inc and Mammoth Energy services. We included Mammoth Energy Services, to our peer group in 2018 because we believe they are a relevant peer in assessing our performance.Inc. Subsequent measurement points are the last trading days of each quarter in 2017. We did not provide a five-year graph because we became a publicly traded company in March of 2017.quarter. The total cumulative dollar returns shown on the graph represent the value that such investments would have had on the

last trading date of 2018.2021. The calculations exclude trading commissions and taxes. The stock price performance on the following graph and table is not necessarily indicative of future stock price performance.

chart-76b1ba05158957b5984.jpg
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Date Peer Group
 Russell 2000
 ProPetro Holding Corp.
3/17/2017 $100.0
 $100.0
 $100.0
3/31/2017 $97.3
 $99.6
 $88.9
6/30/2017 $90.4
 $101.7
 $96.3
9/29/2017 $97.3
 $107.1
 $99.0
12/29/2017 $104.2
 $110.4
 $139.0
3/29/2018 $83.4
 $109.9
 $109.6
6/29/2018 $78.6
 $118.1
 $108.1
9/28/2018 $74.8
 $121.9
 $113.7
12/31/2018 $43.9
 $96.9
 $85.0
pump-20211231_g1.jpg

31


DatePeer GroupRussell 2000ProPetro Holding Corp.
3/17/2017$100.0 $100.0 $100.0 
3/31/2017$97.0 $100.1 $88.9 
6/30/2017$93.2 $102.6 $96.3 
9/29/2017$105.2 $108.4 $99.0 
12/29/2017$114.3 $112.0 $139.0 
3/29/2018$91.0 $111.9 $109.6 
6/29/2018$86.9 $120.6 $108.1 
9/28/2018$85.1 $124.9 $113.7 
12/31/2018$52.9 $99.7 $85.0 
3/31/2019$65.2 $114.2 $155.4 
6/30/2019$47.5 $116.6 $142.8 
9/30/2019$35.1 $113.8 $62.7 
12/31/2019$38.8 $125.1 $77.6 
3/31/2020$9.7 $86.8 $17.2 
6/30/2020$16.2 $108.9 $35.5 
9/30/2020$15.5 $114.3 $28.0 
12/31/2020$23.8 $150.1 $51.0 
3/31/2021$29.5 $169.2 $73.5 
6/30/2021$35.4 $176.5 $63.2 
9/30/2021$31.9 $168.8 $59.7 
12/31/2021$27.5 $172.4 $55.9 
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Item 6.     Selected Historical Financial Data.[Reserved]
The following table presents the available selected historical financial data of ProPetro Holding Corp. for the years indicated. There were no factors that materially affect the comparability of the information in the selected historical financial data presented.
The selected historical consolidated financial and operating data presented below should be read in conjunction with “Risk Factors,” “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and our consolidated financial statements and the related notes and other financial data included elsewhere in this annual report.


33
 Year Ended December 31,
(In thousands, except for per share data)2018 2017 2016 2015
Statement of Operations Data:       
Revenue$1,704,562
 $981,865
 $436,920
 $569,618
Pressure pumping1,658,403
 945,040
 409,014
 510,198
All other46,159
 36,825
 27,906
 59,420
Costs and Expenses:       
Cost of services(1)
1,270,577
 813,823
 404,140
 483,338
General and administrative(2)
53,958
 49,215
 26,613
 27,370
Depreciation and amortization88,138
 55,628
 43,542
 50,134
Property and equipment impairment expense
 
 6,305
 36,609
Goodwill impairment expense
 
 1,177
 
Loss on disposal of assets59,220
 39,086
 22,529
 21,268
Total costs and expenses1,471,893
 957,752
 504,306
 618,719
Operating Income (Loss)232,669
 24,113
 (67,386) (49,101)
Other Income (Expense):       
Interest expense(6,889) (7,347) (20,387) (21,641)
Gain on extinguishment of debt
 
 6,975
 
Other expense(663) (1,025) (321) (499)
Total other expense(7,552) (8,372) (13,733) (22,140)
Income (loss) before income taxes225,117
 15,741
 (81,119) (71,241)
Income tax (expense) benefit(51,255) (3,128) 27,972
 25,388
Net income (loss)$173,862
 $12,613
 $(53,147) $(45,853)
Per Share Information       
Net income (loss) per common share:       
Basic$2.08
 $0.17
 $(1.19) $(1.31)
Diluted$2.00
 $0.16
 $(1.19) $(1.31)
Weighted average common shares outstanding:       
Basic83,460
 76,371
 44,787
 34,993
Diluted87,046
 79,583
 44,787
 34,993
Balance Sheet Data as of:       
Cash and cash equivalents$132,700
 $23,949
 $133,596
 $34,310
Property and equipment — net of accumulated depreciation$912,846
 $470,910
 $263,862
 $291,838
Total assets$1,274,522
 $719,032
 $541,422
 $446,454
Long-term debt — net of deferred loan costs$70,000
 $57,178
 $159,407
 $236,876
Total shareholders’ equity$797,355
 $413,252
 $221,009
 $69,571
Cash Flow Statement Data:       
Net cash provided by operating activities$393,079
 $109,257
 $10,659
 $81,230
Net cash used in investing activities$(280,604) $(281,469) $(41,688) $(62,776)
Net cash provided by (used in) financing activities$(3,724) $62,565
 $130,315
 $(15,216)


(1)Exclusive of depreciation and amortization.
(2)Inclusive of stock‑based compensation.



Item 7.Management’s Discussion and Analysis of Financial Condition and Results of Operations.
You should read the following discussion and analysis of our financial condition and results of operations together with our audited consolidated financial statements and the related notes included in this Form 10-K.Annual Report. Some of the information contained in this discussion and analysis or set forth elsewhere in this Form 10-K,Annual Report, including information with respect to our plans and strategy for our business and related financing, includes forward‑looking statements that involve risks and uncertainties. You should read the “Risk Factors”"Risk Factors" section of this Form 10-KAnnual Report for a discussion of important factors that could cause actual results to differ materially from the results described in or implied by the forward‑looking statements contained in the following discussion and analysis.
Basis of Presentation
This discussion of our results of operations omits our results of operations for the year ended December 31, 2019 and the comparison of our results of operations for the years ended December 31, 2020 and 2019, which may be found in our Annual Report on Form 10-K for the year ended December 31, 2020, filed with the SEC on March 5, 2021.
Unless otherwise indicated, references in this “Management’s"Management’s Discussion and Analysis of Financial Condition and Results of Operations”Operations" to “ProPetro"ProPetro Holding Corp.,” “the""the Company,” “we,” “our,” “us”""we,""our,""us" or like terms refer to ProPetro Holding Corp. and its subsidiary.
Overview
Our Business
We are a growth‑oriented, Midland, Texas‑based oilfield services company providing hydraulic fracturing and other complementary services to leading upstream oil and gas companies engaged in the exploration and production, or E&P of North American unconventional oil and natural gas resources. Our operations are primarily focused in the Permian Basin, where we have cultivated longstanding customer relationships with some of the region’s most active and well‑capitalized E&P companies. Further, our fleet has been designed to handle the highest intensity and most complex fracturing jobs. During the ended December 31, 2018, we continued our organic growth by purchasing and deploying four newbuild hydraulic fracturing units, bringing our hydraulic horsepower, or HHP capacity to 905,000 HHP, or 20 fleets. The Permian Basin is widely regarded as one of the most prolific oil‑producing areaareas in the United States, and following our acquisition of pressure pumping and related assets from Pioneer and Pioneer Pumping Services, we believe we are currentlyone of the largest providerleading providers of hydraulic fracturing services in the region by HHP.
          Our total available HHP at December 31, 2021 was 1,423,000 HHP, which was comprised of 90,000 HHP of our Tier IV DGB equipment, 1,225,000 HHP of conventional Tier II equipment and 108,000 HHP of our DuraStim® electric hydraulic fracturing equipment. Our fleet could range from approximately 50,000 to 80,000 HHP depending on the job design and customer demand at the wellsites. With the industry transition to lower emissions equipment and Simul-Frac, in addition to several other changes to our customers' job designs, we believe that our available fleet capacity could decline if we decide to reconfigure our fleets to increase active HHP and backup HHP at the wellsites. In September 2021, we placed an order with total horseour equipment manufacturers for 125,000 HHP of Tier IV DGB equipment for additional conversions, which we expect to be delivered at different times through the first half of 2022.
          In 2019, we entered into a purchase commitment for 108,000 HHP of DuraStim® electric powered hydraulic fracturing equipment. In addition to DuraStim® fleets, we are also evaluating other electric and alternative pressure pumping solutions. In December 2021, we disposed of our two gas turbines initially purchased to provide electrical power of 1,415,000 HHP,to our DuraStim® fleets but as determined they were an inefficient power solution in the field. In the future, we may lease electrical power equipment from a third party or 28 fleets.rely on our customers to provide power solutions for our electric equipment.
          AcquisitionOur substantial market presence in the Permian Basin positions us well to capitalize on drilling and completion activity in the region. Primarily, our operational focus has been in the Permian Basin's Midland sub-basin, where our customers have operated. However, we have recently increased our operations in the Delaware sub-basin and are well-positioned to support further increases to our activity in this area in response to demand from our customers. Over time, we expect the Permian Basin's Midland and Delaware sub-basins to continue to command a disproportionate share of future North American E&P spending.
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          Through our pressure pumping segment (which also includes our cementing operations), we primarily provide hydraulic fracturing services to E&P companies in the Permian Basin. Our hydraulic fracturing fleet has been designed to handle the operating conditions commonly utilized in the Permian Basin and the region's increasingly high-intensity well completions (including Simul-Frac, which involves fracturing multiple wellbores at the same time), which are characterized by longer horizontal wellbores, more stages per lateral and increasing amounts of proppant per well.

          In addition to our core pressure pumping segment operations, which includes our cementing operations, we also offer coiled tubing services. Through our coiled tubing services segment, we seek to create operational efficiencies for our customers, which could allow us to capture a greater portion of their capital spending across the lifecycle of a well.
Pioneer Pressure Pumping AssetsAcquisition
On December 31, 2018, we consummated the purchase of certain pressure pumping and related assets and real property fromof Pioneer and Pioneer Pumping Services. Prior toServices, LLC in the purchase, thePioneer Pressure Pumping Acquisition. The pressure pumping assets exclusively provided integrated pressure pumping services to Pioneer’s completionacquired included hydraulic fracturing pumps of 510,000 HHP, four coiled tubing units and production operations. The acquisition cost of the assets was comprised of $110.0 million of cash and 16.6 million shares of our common stock.associated equipment maintenance facility. In connection with the consummation of the transaction,acquisition, we became a strategic long-term service provider to Pioneer under the Pioneer Services Agreement, providing pressure pumping and related services for a term of up to 10 years.years; provided, that Pioneer has the right to terminate the Pioneer Services Agreement, in whole or part, effective as of December 31 of each of the calendar years of 2022, 2024 and 2026. Pioneer can increase the number of committed fleets prior to December 31, 2022. Pursuant to the Pioneer Services Agreement, the Company is entitled to receive compensation if Pioneer were to idle committed fleets ("idle fees"); however, we are first required to use all economically reasonable efforts to deploy the idled fleets to another customer. At the present, we have eight fleets committed to Pioneer. During times when there is a significant reduction in overall demand for our services, the idle fees could represent a material portion of our revenues.
          While management believes our relationship with Pioneer will continue beyond December 31, 2022, if Pioneer elects to terminate the Pioneer Services Agreement effective December 31, 2022, or seeks to renegotiate the terms on which we provide services to Pioneer, it could have a material adverse effect on our future financial condition, results of operations and cash flows.
Commodity Price and Other Economic Conditions
The oil and gas industry has traditionally been volatile and is influenced by a combination of long-term, short-term and cyclical trends, including domestic and international supply and demand for oil and gas, current and expected future prices for oil and gas and the perceived stability and sustainability of those prices, and capital investments of E&P companies toward their development and production of oil and gas reserves. The oil and gas industry is also impacted by general domestic and international economic conditions such as supply chain disruptions and inflation, political instability in oil producing countries, government regulations (both in the United States and internationally), levels of consumer demand, adverse weather conditions, and other factors that are beyond our control.
The global public health crisis associated with the COVID-19 pandemic could continue to have an adverse effect on global economic activity for the foreseeable future. Some of the challenges resulting from the COVID-19 pandemic that have impacted our business include restrictions on movement of personnel and associated gatherings, shortage of skilled labor, cost inflation and supply chain disruptions. Additionally, with most of the large, capitalized E&P companies in the United States, including our customers, closely managing their operating budget and exercising capital discipline, we do not currently expect significant increases in crude oil production over the short-to-medium term. Furthermore, OPEC+ has indicated that they will continue with their plans to manage production levels by gradually increasing crude oil output. With the tightness in crude oil production and growing demand for crude oil, there has been a significant increase in rig count and WTI crude oil prices have increased to over $90 per barrel in February 2022 from its recent lowest point of $20 per barrel in March 2020. The Permian Basin rig count has increased significantly from approximately 179 at the beginning of 2021 to approximately 294 at the end of 2021, according to Baker Hughes. Although crude oil prices are currently
35


at a 7-year high, the oilfield services industry, including the pressure pumping assets acquired include eight hydraulic fracturing fleets with a totalsegment, has not fully recovered as evidenced by continued depressed pricing for most of 510,000 HHP, four coiled tubing unitsour services, and an associated equipment maintenance facility. Through this acquisition we expanded our existing presenceshortages of skilled labor force in the Permian Basin, coupled with rising inflationary costs. However, we still believe that the Permian Basin, our primary area of operation, will be the most attractive basin to E&P companies and increasedshould command higher prices and associated profitability, if the overall demand for crude oil and our services continues to increase.
Government regulations and investors are demanding the oil and gas industry transition to a lower emissions operating environment, including the upstream and oilfield services companies. As a result, we are working with our customers and equipment manufacturers to transition to a lower emissions profile. Currently, a number of lower emission solutions for pumping capacity by 56%, to 28 hydraulic fracturing fleets with a total of 1,415,000 HHP, further strengthening our position as the largest pure-play provider of integrated well completion servicesequipment, including Tier IV DGB, electric, direct drive gas turbine and other technologies have been developed, and we expect additional lower emission solutions will be developed in the future. We are continually evaluating these technologies and other investment and acquisition opportunities that would support our existing and new customer relationships. The transition to lower emissions equipment is quickly evolving and will be capital intensive. Over time, we may be required to convert substantially all of our conventional Tier II equipment to lower emissions equipment. If we are unable to quickly transition to lower emissions equipment and meet our and our customers’ emissions goals, the demand for our services could be adversely impacted.
          The Permian Basin.Basin rig count increase, WTI crude oil price increase and cost inflation could be indicative of an energy market recovery. If the rig count and market conditions continue to improve, including improved customers' pricing and labor availability, and we are able to meet our customers' lower emissions equipment demands, we believe our operational and financial results will also continue to improve. However, if market conditions do not improve, and we are unable to increase our pricing or pass-through future cost increases to our customers, there could be a material adverse impact on our business, results of operations and cash flows.

          Our results of operations have historically reflected seasonal tendencies, typically in the fourth quarter, relating to the holiday season, inclement winter weather and exhaustion of our customers' annual budgets. As a result, we typically experience declines in our operating and financial results in November and December, even in a stable commodity price and operations environment.





20182021 Operational Highlights
Over the course of the year ended December 31, 2018, we:2021:
Purchasedalthough we gradually captured improved pricing during the year, the recent energy industry disruption and put into service four newbuild hydraulic fracturing fleets;impact of COVID-19 pandemic continued to adversely impact overall demand for and pricing of our services;
Consummatedwe experienced rapidly increasing inflationary cost resulting from labor and supply chain tightness, which negatively impacted our profitability and cash flows;
our average effectively utilized fleet count was approximately 12 active fleets, a 20% increase from approximately 10 active fleets in 2020;
we transitioned 90,000 HHP of our equipment portfolio to lower emissions, Tier IV DGB equipment. In 2022, we plan to convert an additional 125,000 HHP to Tier IV DGB equipment, with total conversion costs expected to approximate $74 million; and
we continued to test and develop, alongside the acquisition of pressure pumping and related assets from Pioneer and Pioneer Pumping Services, adding eight hydraulic fracturing fleets, or 510,000 HHP, and ancillary equipment expandingmanufacturer, our total horse power to 1,415,000 HHP or 28 hydraulic fracturing fleets after giving effect to the acquisition;existing DuraStim® equipment.
In connection with the asset acquisition, entered into a long-term strategic relationship with Pioneer, an industry leading E&P company, to provide pressure pumping and related services for a term of up to 10 years;
36


Increased our ABL Credit Facility from $200.0 million to $300.0 million, while extending the term of the facility; and
Maintained a conservative balance sheet and sufficient liquidity.
Regional sand pumped increased significantly in 2018 from 14.7% in January 2018 to 71.6% in December 2018, which slightly impacted sand revenue offset by increased margin percentage.
20182021 Financial Highlights
Among other financial          Financial highlights for the year ended December 31, 2018:2021:
Revenuerevenue increased $722.7$85.3 million, or 73.6%10.8%, to $1,704.6$874.5 million, as compared to $981.9$789.2 million for the year ended December 31, 2017,2020, primarily as a result of the increase in our fleet size;demand for pressure pumping services following the depressed oil prices and economic slowdown caused by the COVID-19 pandemic that negatively impacted E&P completions activity;
Costcost of services (exclusive of depreciation and amortization) increased $456.8$78.0 million or 56.1%13.3% to $1,270.6$662.3 million, as compared to $813.8$584.3 million for the year ended December 31, 2017,2020, primarily as a result of our higher utilization and activity levels, following the increaserebound from the depressed oil prices and economic slowdown caused by the COVID-19 pandemic that negatively impacted E&P completions activity in fleet size, resulting in higher activity levels. Cost2020; cost of services as a percentage of revenue decreasedincreased to 74.5%75.7% in 20182021 compared to 82.9%74.0% for the year ended December 31, 2017;2020;
Generalgeneral and administrative expenses, inclusive of stock-based compensation, (“G&A”), increased $4.7decreased $3.8 million, or 9.6%4.4% to $54.0$82.9 million, as compared to $49.2$86.8 million for the December 31, 2017. G&A as a percentage of revenue decreased to 3.2% in 2018 from 5.0% for the year ended December 31, 2017;2020;
Diluted net income per common share was $2.00,no impairment expense recorded during the year December 31, 2021, compared to $0.16$38.0 million during the year ended December 31, 2020;
net loss was $54.2 million, compared to a net loss of $107.0 million for the year ended December 31, 2017.2020. Diluted net loss per common share was $0.53, compared to diluted net loss per common share of $1.06 for the year ended December 31, 2020. Adjusted EBITDA was approximately $135.0 million, compared to $141.5 million for the year ended December 31, 2020 (see reconciliation of Adjusted EBITDA to net income in the subsequent section "How We Evaluate Our Operations");
2019 Outlookgenerated cash of approximately $36.0 million from the sale of our two turbines in December 2021;
our total liquidity was $169.3 million, consisting of cash of $111.9 million and remaining availability of $57.4 million under our ABL Credit Facility; and
no debt as of December 31, 2021 under our ABL Credit Facility.
Actions to Address the Economic Impact of COVID-19
          Since March 2020, we initiated several actions to mitigate the anticipated adverse economic conditions for the immediate future and to support our financial position, liquidity and the efficient continuity of our operations as follows:
Growth Capital: our operations were driven by more dedicated work from our customers. Our capital expenditure program was focused on maintaining existing dedicated demand for our equipment. We reduced capital investment in speculative growth.
Other Expenditures: we strategically managed our maintenance program in line with our projected activity levels. We continued to seek lower pricing and cost saving measures for our expendable items, materials used in day-to-day operations and large component replacement parts. In 2019,addition, with the supply chain disruptions, we worked closely with our vendors to better plan our future needs and accelerated purchases of certain components and spare parts;
Labor Force: we implemented several strategies including pay adjustments of approximately 8% to retain and attract skilled workforce that will support our operations;
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Working Capital: we have negotiated more favorable payment terms with certain of our larger vendors, strategically disposed of certain assets to improve our liquidity position and continue to actively manage our portfolio of accounts receivables; and
Customer Pricing: we continue to focus on providing best-in-class service tohave ongoing pricing conversations with our customers helping our customer improve their well economics while continuing to enhance the Company’s profitability. We expectpermit us to achieve these objectives through:
continuing to enhance our dedicated customer model to drive production efficiencies;
maintaining full utilization of our hydraulic fracturing fleets;
pursuing operational efficiencies and cost reduction strategies;
pursuing expansion opportunities for our non-hydraulic fracturing operations;
maintaining our existing relationships with our vendors and developing strategic relationships with new suppliers to ensure continuity;
exploring potential opportunities for mergers or acquisitions, focusedearn an appropriate return on our growth, market opportunitiesequipment and creating valuecapital investments and to cover rising inflationary cost resulting from the impact of COVID-19 on labor force, supply chain and our shareholders.operations in general.

Our Assets and Operations
Through our pressure pumping segment, which includes cementing operations, we primarily provide hydraulic fracturing services (inclusive of acidizing services) to E&P companies in the Permian Basin. Our modern hydraulic fracturing fleet hasfleets have been designed to handle Permian Basin specific operating conditions and the region’s increasingly high‑intensity well completions, which are characterized by longer horizontal wellbores, more frac stages per lateral and increasing amounts of proppant per well. We have fully maintainedplan to continually reinvest in our equipment throughout the recent industry downturn to ensure optimal performance and reliability.
In addition to our core pressure pumping segment operations, we also offer a suite of complementary well completion and production services, including coiled tubing and flowbackother services. We believe these complementary services create operational efficiencies for our customers and could allow us to capture a greater portion of their capital spending across the lifecycle of a well. Additionally, we believe that these complementary services should benefit from a continued industry recovery and that we are well positioned to continue expanding these offerings in response to our customers’ increasing service needs and spending levels.the future.
How We Generate Revenue
We generate revenue primarily through our pressure pumping segment, and more specifically, by providing hydraulic fracturing services to our customers. We own and operate a fleet of mobile hydraulic fracturing units and other auxiliary equipment to perform fracturing services. We also provide personnel and services that are tailored to meet each of our customers’ needs. We charge our customers on a per‑job basis, in which we set pricing terms after receiving full specifications for the requested job, including the lateral length of the customer’s wellbore, the number of frac stages per well, the amount of proppant and chemicals to be employedused and other parameters of the job. We also could generate revenue from idle fees from our customers in certain circumstances when committed fleets are idled.
In addition to hydraulic fracturing services, we generate revenue through the complementary services that we provide to our customers, including cementing, coiled tubing and flowbackother related services. These complementary services are provided through various contractual arrangements, including on a turnkey contract basis, in which we set a price to perform a particular job, or a daywork contract basis, in which we are paid a set price per day for our services. We are also sometimes paid by the hour for these complementary services.
          Demand for our services is largely dependent on oil and natural gas prices, and our customers’ well completion budgets and rig count. Our revenue, profitability and cash flows are highly dependent upon prevailing crude oil prices and expectations about future prices. For many years, oil prices and markets have been extremely volatile. Prices are affected by many factors beyond our control. West Texas Intermediate (“WTI”) oil prices which declined significantly in 2015 and 2016, but recovered somewhat during 2017 and 2018. The average WTI oil prices per barrel was $65.1, $50.8were approximately $68, $39 and $43.3$57 for the years ended December 31, 2018, 20172021, 2020 and 2016,2019, respectively. As aIn February 2022, the WTI oil price was over $90 per barrel. If the WTI oil price declines in the future or remains highly volatile, demand for our services may be negatively impacted, which could result of the recent recovery in oil prices, our industry has experienced a significant increasedecrease in both drillingour future profitability and pressure pumping activity levels. Looking forward, if oil prices increase, we believe U.S. rig counts will also increase, which may result in an increase in demand for drilling and pressure pumping services. Highercash flows. We monitor the oil and natural gas prices do not necessarily result in increased activity becauseand the Permian Basin rig count to enable us to more effectively plan our business and forecast the demand for our services is generally driven by our customers’ expectations of future oil and natural gas prices, as well as rig count.services.
38


The historical weekly average Permian Basin rig countscount based on the weekly Baker Hughes IncorporatedCompany rig count information werewas as follows:
Year Ended December 31,
Drilling Rig Type (Permian Basin)202120202019
Directional
Horizontal227 212 405 
Vertical11 32 
Total240 221 442 
Average Permian Basin rig count to U.S rig count50.5 %51.0 %46.9 %
 Year Ended December 31
Drilling Type (Permian Basin)2018 2017 2016
Directional6
 6
 2
Horizontal418
 311
 154
Vertical43
 39
 26
Total467
 356
 182

Costs of Conducting our Business
The principal direct costs involved in operating our business are direct labor, expendables and other direct costs.
Direct Labor Costs. Payroll and benefit expenses related to our crews and other employees that are directly or indirectly attributable to the effective delivery of services are included in our operating costs. Direct labor costs amounted to 22.4% and direct labor costs. Generally, we price each job to reflect a predetermined margin over our expendables22.7% of total costs of service for the years ended December 31, 2021 and direct labor costs. Our fixed costs are relatively low and a large portion of the costs described below are only incurred as we perform jobs for our customers.2020, respectively.
Expendables. Expendables are the largest expenses incurred, and include the product and freight costs associated with proppant, chemicals and other consumables used in our pressure pumping and other operations. These costs comprise a substantial variable component of our service costs, particularly with respect to the quantity and quality of sand and chemicals demanded when providing hydraulic fracturing services. Expendable productproduct costs comprised approximately 56.0%41.8%, 61.3% and 61.0%37.6% of total costs of service for the years ended December 31, 2018, 20172021 and 2016,2020, respectively. The decreasepercentage increase in our expendable product cost as a percentage of revenue in 2018 is2021 was primarily attributable to the increase in the number of customers self-sourcing these expendablesour activity levels and an increase in the use of less expensive regional sand.higher freight cost.
Other Direct Costs. We incur other direct expenses related to our service offerings, including the costs of fuel, repairs and maintenance, general supplies, equipment rental and other miscellaneous operating expenses. Fuel is consumed both in the operation and movement of our hydraulic fracturing fleet and other equipment. Repairs and maintenance costs are expenses directly related to upkeep of equipment, which have been amplified by the demand for higher horsepower jobs. Capital expenditures to upgrade or extend the useful life of equipment are capitalized and are not included in other direct costs. Other direct costs were 30.9%, 26.5% 35.8% and 24.4%39.7% of total costs of service for the years ended December 31, 2018, 20172021 and 2016,2020, respectively. The percentage decrease in 2021 was primarily driven by most of our customers directly sourcing diesel and pricing improvement.
Direct Labor Costs. Payroll and benefit expenses related to our crews and other employees that are directly attributable to the effective delivery of services are included in our operating costs. Direct labor costs amounted to 13.1%, 12.2% and 14.5% of total costs of service for the years ended December 31, 2018, 2017 and 2016, respectively.
How We Evaluate Our Operations
Our management uses a variety of financial and operating metricsAdjusted EBITDA or Adjusted EBITDA margin to evaluate and analyze the performance of our business, including Adjusted EBITDA or Adjusted EBITDA margin.various operating segments.
Adjusted EBITDA and Adjusted EBITDA marginMargin
We view Adjusted EBITDA orand Adjusted EBITDA margin as important indicators of performance. We define EBITDA as our net income (loss),earnings, before (i) interest expense, (ii) income taxes and (iii) depreciation and amortization. We define Adjusted EBITDA as EBITDA, plus (i) loss/(gain) on disposal of assets, (ii) (gain) on extinguishment of debt, (iii) stock basedstock-based compensation, and (iv)(iii) other unusual or non‑recurringnonrecurring (income)/expenses, such as impairment andcharges, severance, costs related to our initial public offering.asset acquisitions, insurance recoveries, costs related to SEC investigation and class action lawsuits and one-time professional and advisory fees. Adjusted EBITDA margin reflects our Adjusted EBITDA as a percentage of our revenues.
39


Adjusted EBITDA orand Adjusted EBITDA margin are supplemental measures utilized by our management and other users of our financial statements such as investors, commercial banks, and research analysts, to assess our financial performance because it allows us and other users to compare our operating performance on a consistent basis across periods by removing the effects of our capital structure (such as varying levels of interest expense), asset base (such as depreciation and amortization), nonrecurring (income)/expenses and items outside the control of our management team (such as income tax rates)taxes). Adjusted EBITDA and Adjusted EBITDA margin have limitations as analytical tools and should not be considered as an alternative to net income/income (loss), operating income/income (loss), cash flow from operating activities or any other measure of financial performance presented in accordance with generally accepted accounting principles in the United States of America (“GAAP”("GAAP").

Note Regarding Non‑GAAP Financial Measures
Adjusted EBITDA and Adjusted EBITDA margin are usually not financial measures presented in accordance with GAAP (“non-GAAP”("non-GAAP"), except when specifically required to be disclosed by GAAP in the financial statements. We believe that the presentation of Adjusted EBITDA orand Adjusted EBITDA margin provide useful information to investors in assessing our financial condition and results of operations because it allows them to compare our operating performance on a consistent basis across periods by removing the effects of our capital structure, asset base, nonrecurring (income) expenses (income) and items outside the control of the Company. Net income (loss) is the GAAP measure most directly comparable to Adjusted EBITDA. Adjusted EBITDA orand Adjusted EBITDA margin should not be considered as alternatives to the most directly comparable GAAP financial measure. Each of these non-GAAP financial measures has important limitations as analytical tools because they exclude some, but not all, items that affect the most directly comparable GAAP financial measures. You should not consider Adjusted EBITDA orand Adjusted EBITDA margin in isolation or as a substitute for an analysis of our results as reported under GAAP. Because Adjusted EBITDA orand Adjusted EBITDA margin may be defined differently by other companies in our industry, our definitions of these non-GAAP financial measures may not be comparable to similarly titled measures of other companies, thereby diminishing their utility.
Reconciliation of net (loss) income (loss) to Adjusted EBITDA:EBITDA ($ in thousands):
Pressure
Pumping
All OtherTotal
Year ended December 31, 2021
Net loss$(12,723)$(41,462)$(54,185)
Depreciation and amortization129,478 3,899 133,377 
Interest expense— 614 614 
Income tax benefit— (14,252)(14,252)
Loss (gain) on disposal of assets64,903 (257)64,646 
Stock‑based compensation— 11,519 11,519 
Other income— (873)(873)
Other general and administrative expense (1)
— (6,471)(6,471)
Severance expense30 602 632 
Adjusted EBITDA$181,688 $(46,681)$135,007 
40


Pressure
Pumping
All OtherTotal
($ in thousands)Pressure
Pumping
 All Other Total
Year ended December 31, 2018     
Year ended December 31, 2020Year ended December 31, 2020
Net lossNet loss$(68,271)$(38,749)$(107,020)
Depreciation and amortizationDepreciation and amortization148,659 4,631 153,290 
Interest expenseInterest expense2,382 2,383 
Income tax benefitIncome tax benefit— (27,480)(27,480)
Loss on disposal of assetsLoss on disposal of assets56,659 1,477 58,136 
Impairment expenseImpairment expense36,907 1,095 38,002 
Stock‑based compensationStock‑based compensation— 9,100 9,100 
Other expenseOther expense— 874 874 
Other general and administrative expense (1)
Other general and administrative expense (1)
— 13,038 13,038 
Retention bonus and severance expenseRetention bonus and severance expense75 1,065 1,140 
Adjusted EBITDAAdjusted EBITDA$174,030 $(32,567)$141,463 
Pressure
Pumping
All OtherTotal
Year ended December 31, 2019Year ended December 31, 2019
Net income (loss)$253,196
 $(79,334) $173,862
Net income (loss)$281,090 $(118,080)$163,010 
Depreciation and amortization83,404
 4,734
 88,138
Depreciation and amortization139,348 5,956 145,304 
Interest expense
 6,889
 6,889
Interest expense51 7,090 7,141 
Income tax expense
 51,255
 51,255
Income tax expense— 50,494 50,494 
Loss (gain) on disposal of assets59,962
 (742) 59,220
Loss on disposal of assetsLoss on disposal of assets106,178 633 106,811 
Impairment expenseImpairment expense— 3,405 3,405 
Stock‑based compensation
 5,482
 5,482
Stock‑based compensation— 7,776 7,776 
Other expense
 663
 663
Other expense— 717 717 
Other general and administrative expense (1)
2
 203
 205
Other general and administrative expense (1)
— 25,208 25,208 
Deferred IPO Bonus1,832
 977
 2,809
Deferred IPO bonus, retention bonus and severance expenseDeferred IPO bonus, retention bonus and severance expense7,093 2,110 9,203 
Adjusted EBITDA$398,396
 $(9,873) $388,523
Adjusted EBITDA$533,760 $(14,691)$519,069 

____________________

(1)During the years ended December 31, 2021, 2020 and 2019, other general and administrative expense (net of reimbursement from insurance carriers) primarily relates to nonrecurring professional fees paid to external consultants in connection with our audit committee review, SEC investigation and shareholder litigation, net of insurance recoveries. During the years ended December 31, 2021, 2020 and 2019, we received reimbursement of approximately $9.8 million, $0.6 million and $0, respectively, from our insurance carriers in connection with the SEC investigation and shareholder litigation.
41
($ in thousands)Pressure
Pumping
 All Other Total
Year ended December 31, 2017     
Net income (loss)$50,417
 $(37,804) $12,613
Depreciation and amortization51,155
 4,473
 55,628
Interest expense
 7,347
 7,347
Income tax expense
 3,128
 3,128
Loss on disposal of assets38,059
 1,027
 39,086
Stock‑based compensation
 9,489
 9,489
Other expense
 1,025
 1,025
Other general and administrative expense (1)

 722
 722
Deferred IPO Bonus5,491
 2,914
 8,405
Adjusted EBITDA$145,122
 $(7,679) $137,443
      
 Pressure
Pumping
 All Other Total
Year ended December 31, 2016     
Net loss$(45,316) $(7,831) $(53,147)
Depreciation and amortization37,282
 6,260
 43,542
Interest expense
 20,387
 20,387
Income tax benefit
 (27,972) (27,972)
Loss on disposal of assets23,690
 (1,161) 22,529
Property and equipment impairment expense
 6,305
 6,305
Goodwill impairment expense
 1,177
 1,177
Gain on extinguishment of debt
 (6,975) (6,975)
Stock‑based compensation
 1,649
 1,649
Other expense
 321
 321
Adjusted EBITDA$15,656
 $(7,840) $7,816


(1)Other general and administrative expense relates to legal settlement expense.


Results of Operations
We conduct our business through fivethree operating segments: hydraulic fracturing, cementing coil tubing, flowback and drilling.coiled tubing. For reporting purposes, the hydraulic fracturing (which now includes our acidizing operations) and cementing operating segments are aggregated into our one reportable segment, segment—pressure pumping. On August 31, 2018, we divested our surface air drilling segment in order to continue to position ourselves as a Permian Basin-focused pressure pumping business because we believe the pressure pumping market in the Permian Basin offers more supportive long-term growth fundamentals. In addition, with increased focus on our pressure pumping operations, we expect revenues and costs of services related to our drilling operating segment to comprise a lower percentage of total revenues and total costs of service in future results of operations when compared to historic results. Accordingly, we anticipate the financial significance of our drilling segment relative to the financial results from pressure pumping and other service offerings to continue to decline.
Year Ended December 31, 20182021 Compared to Year Ended December 31, 20172020
($ in thousands, except percentages)
Year Ended December 31,Change
20212020Variance%
Revenue$874,514 $789,232 $85,282 10.8 %
Less (Add):
Cost of services (1)
662,266 584,279 77,987 13.3 %
General and administrative expense (2)
82,921 86,768 (3,847)(4.4)%
Depreciation and amortization133,377 153,290 (19,913)(13.0)%
Impairment expense— 38,002 (38,002)(100.0)%
Loss on disposal of assets64,646 58,136 6,510 11.2 %
Interest expense614 2,383 (1,769)(74.2)%
Other expense (income)(873)874 1,747 199.9 %
Income tax benefit(14,252)(27,480)(13,228)(48.1)%
Net loss$(54,185)$(107,020)$(52,835)(49.4)%
Adjusted EBITDA (3)
$135,007 $141,463 $(6,456)(4.6)%
Adjusted EBITDA Margin (3)
15.4 %17.9 %(2.5)%(14.0)%
  
Pressure pumping segment results of operations:
Revenue$857,642 $773,474 $84,168 10.9 %
Cost of services$647,570 $570,442 $77,128 13.5 %
Adjusted EBITDA$181,688 $174,030 $7,658 4.4 %
Adjusted EBITDA Margin (4)
21.2 %22.5 %(1.3)%(5.8)%
____________________
(1)    Exclusive of depreciation and amortization.
(2)    Inclusive of stock‑based compensation of $11.5 million and $9.1 million for 2021 and 2020, respectively.
(3)    For definitions of the non‑GAAP financial measures of Adjusted EBITDA and Adjusted EBITDA margin and reconciliation of Adjusted EBITDA and Adjusted EBITDA margin to our most directly comparable financial measures calculated in accordance with GAAP, please read "How We Evaluate Our Operations." Included in our Adjusted EBITDA is idle fees of $9.5 million and $47.2 million for the years ended December 31, 2021 and 2020, respectively.
(4)    The non‑GAAP financial measure of Adjusted EBITDA margin for the pressure pumping segment is calculated by taking Adjusted EBITDA for the pressure pumping segment as a percentage of our revenues for the pressure pumping segment.
($ in thousands, except percentages) YEAR ENDED CHANGE
  2018 2017 Variance %
Revenue $1,704,562
 $981,865
 $722,697
 73.6 %
Cost of services (1)
 1,270,577
 813,823
 456,754
 56.1 %
General and administrative expense (2)
 53,958
 49,215
 4,743
 9.6 %
Depreciation and amortization 88,138
 55,628
 32,510
 58.4 %
Loss on disposal of assets 59,220
 39,086
 20,134
 51.5 %
Interest expense 6,889
 7,347
 (458) (6.2)%
Other expense 663
 1,025
 (362) (35.3)%
Income tax expense 51,255
 3,128
 48,127
 1,538.6 %
         
Net income $173,862
 $12,613
 $161,249
 1,278.4 %
 
 
    
Adjusted EBITDA (3)
 $388,523
 $137,443
 $251,080

182.7 %
Adjusted EBITDA Margin (3)
 22.8% 14.0% 8.8% 62.9 %
   
  
    
Pressure pumping segment results of operations:        
Revenue $1,658,403
 $945,040
 $713,364
 75.5 %
Cost of services $1,236,262
 $784,349
 $451,912
 57.6 %
Adjusted EBITDA $398,396
 $145,122
 $253,274
 174.5 %
Adjusted EBITDA Margin (4)
 24.0% 15.4% 8.6% 55.8 %
42
____________________
(1)Exclusive of depreciation and amortization.
(2)Inclusive of stock‑based compensation.
(3)For definitions of the non‑GAAP financial measures of Adjusted EBITDA and Adjusted EBITDA margin and reconciliation of Adjusted EBITDA and Adjusted EBITDA margin to our most directly comparable financial measures calculated in accordance with GAAP, please read “How We Evaluate Our Operations”.
(4)The non‑GAAP financial measure of Adjusted EBITDA margin for the pressure pumping segment is calculated by taking Adjusted EBITDA for the pressure pumping segment as a percentage of our revenues for the pressure pumping segment.




Revenue.  Revenue increased 73.6% 10.8%, or $722.7$85.3 million, to $1,704.6$874.5 million for the year ended December 31, 2021, as compared to $789.2 million for the year ended December 31, 2018, as compared to $981.92020. Our pressure pumping segment revenues increased 10.9%, or $84.2 million for the year ended December 31, 2017. The increase was primarily attributable to the increase in activity levels resulting from increase in fleet size and demand for our services. Our pressure pumping segment revenues increased 75.5%, or $713.4 million for the year ended December 31, 2018,2021, as compared to the year ended December 31, 2017. 2020. The increases were primarily attributable to the significant increase in demand for pressure pumping services, following the rebound from the depressed oil prices and slowdown in economic activity resulting from the COVID-19 pandemic. The increase in demand for our pressure pumping services resulted in an approximate 20% increase in our average effectively utilized fleet count to approximately 12 active fleets in 2021 from 10 active fleets in 2020. Included in our revenue for the years ended December 31, 2021 and 2020 was revenue generated from idle fees charged to a certain customer of approximately $9.5 million and $47.2 million, respectively.
Revenues from services other than pressure pumping increased 25.3%7.1%, or $9.3approximately $1.1 million, for the year ended December 31, 2018,2021, as compared to the year ended December 31, 2017.2020. The increase in revenues from services other than pressure pumping during the year ended December 31, 2018,2021, was primarily attributable to the increase in demand forutilization experienced in our flowbackcoiled tubing operations, which was driven by increased E&P completions activity following the rebound from the depressed oil prices and coil tubing services.impact of the COVID-19 pandemic.
Cost of Services.  Cost of services increased 56.1%13.3%, or $456.8$78.0 million, to $1,270.6$662.3 million for the year ended December 31, 2018,2021, from $813.8$584.3 million during the year ended December 31, 2017.2020. Cost of services in our pressure pumping segment increased $451.9$77.1 million during the year ended December 31, 2018,2021, as compared to the year ended December 31, 2017.2020. The increases were primarily attributable to our higher utilization and activity levels, coupled with an increase in personnel headcount following the increasedrebound from the depressed oil prices and economic slowdown caused by the COVID-19 pandemic that negatively impacted E&P completions activity levels. Asin 2020. As a percentage of pressure pumping segment revenues (including idle fees), pressure pumping cost of services decreasedincreased to 74.5%75.5% for the year ended December 31, 2018,2021, as compared to 83.0%73.8% for the year ended December 31, 2017. The decrease in2020. Excluding idle fees revenue of $9.5 million and $47.2 million for the years ended December 31, 2021 and 2020, respectively, our pressure pumping cost of services as a percentage of revenue in our pressure pumping segment is attributed topumping revenues for the increased revenue from operational efficiencies and our cost control initiatives, which resulted in significantly higher realized Adjusted EBITDA margins during the yearyears ended December 31, 2018.2021 and 2020 was approximately 76.4% and 78.5%, respectively. The decrease was a result of increased customer activity levels, which is consistent with our increased fleet utilization, coupled with significant pricing pressure in 2020.
General and Administrative Expenses.  General and administrative expenses increased 9.6%decreased 4.4%, or $4.7$3.8 million, to $54.0$82.9 million for the year ended December 31, 2018,2021, as compared to $49.2$86.8 million for the year ended December 31, 2020. The net decrease was primarily attributable to the decrease in (i) nonrecurring advisory and professional fees of $19.4 million, which was primarily attributable to the Company's expanded audit committee internal review, SEC investigation and shareholder litigation, (ii) legal and professional fees of $3.9 million, which was partially offset by net increases of (iii) $15.8 million in payroll expenses, (iv) $2.4 million of stock based compensation expense, (v) $1.2 million in insurance expense and (vi) $0.1 million in other remaining general and administrative expenses.
Depreciation and Amortization.  Depreciation and amortization decreased 13.0%, or $19.9 million, to $133.4 million for the year ended December 31, 2021, as compared to $153.3 million for the year ended December 31, 2017.2020. The net increasedecrease was primarily attributable to increases in payroll, insurance, property taxes, legal and professional fees, traveling expenses, subscriptions and dues and other general and administrative expenses totaling $14.3 million, and offset by athe overall decrease in stock compensationour fixed asset base as of December 31, 2021, partly attributable to the impairment of certain fixed assets in 2020.
Impairment Expense.  There was no impairment expense during the year ended December 31, 2021. During the year ended December 31, 2020, the depressed market conditions, crude oil prices and negative near-term outlook for the utilization of certain of our equipment, resulted in the Company recording an impairment expense of $4.0approximately $38.0 million, of which $9.4 million related to goodwill impairment and deferred IPO cash bonus$28.6 million related to property and equipment impairment. The substantial portion of $5.6 million.our impairment expense in 2020 related to our pressure pumping segment.
Depreciation and Amortization.  Depreciation and amortizationLoss on Disposal of Assets.  Loss on the disposal of assets increased 58.4%11.2%, or $32.5$6.5 million, to $88.1$64.6 million for the year ended December 31, 2018,2021, as compared to $55.6$58.1 million for the year ended December 31, 2017.2020. The increase was primarily attributable to additional property and equipment purchased and put into servicean increase in utilization resulting from an increase in the year ended December 31, 2018. We calculate depreciationoperational intensity of our equipment during 2021. Upon sale or retirement of property and equipment, usingincluding certain major
43


components like fluid ends and power ends of our pressure pumping equipment that are replaced, the straight-line method.
Losscost and related accumulated depreciation are removed from the balance sheet and the net amount is recognized as loss on Disposal of Assets.  Loss on the disposal of assets increased 51.5%assets.
Interest Expense.  Interest expense decreased 74.2%, or $20.1$1.8 million, to $59.2$0.6 million for the year ended December 31, 2018,2021, as compared to $39.1$2.4 million for thethe year ended December 31, 2017. The increase was primarily attributable to increase in our fleet size and greater intensity of jobs completed.
Interest Expense.  Interest expense decreased 6.2%, or $0.5 million, to $6.9 million for the year ended December 31, 2018, as compared to $7.3 million for the year ended December 31, 2017.2020. The decrease in interest expense was primarily attributable to a reductiondecrease in our financing arrangements and zero debt in 2021, compared to 2020. Our interest expense consist primarily of amortization of our averageoriginal loan cost. In 2021, we have zero debt balance in 2018 comparedunder our ABL Credit Facility.
Other Expense (Income).  Other income increased to 2017.
Other Expense.  Other expense was $0.7approximately $0.9 million for the year ended December 31, 2018,2021, as compared to $1.0$0.9 million in expense for the year ended December 31, 2017. The decrease was primarily attributable to a decrease in lenders related expenses, non-recurring listing related expenses, and the loss associated with the change in the fair value of our extinguished interest rate swap liability.
Income Tax Expense.  Income tax expense was $51.3 million for the year ended December 31, 2018, as compared to $3.1 million for the year ended December 31, 2017.2020. The increase in our provision forother income tax expense is primarily attributable to the increase in book income in 2018 comparednet refund of approximately $2.1 million to 2017. Additionally, the incomeCompany from a sales and excise and use tax audit and partially offset by an expense related to our lender's commitment fees during the year ended December 31, 2017, included a one-time deferred tax benefit offset of $3.4 million, resulting from the U.S. government enacted tax legislation commonly referred to as the Tax Cuts and Jobs Act (“Tax Act”). 

Year Ended December 31, 2017 Compared to Year Ended December 31, 2016
  YEAR ENDED CHANGE
($ in thousands, except percentages) 2017 2016 Variance %
Revenue $981,865
 $436,920
 $544,945
 124.7 %
Cost of services (1)
 813,823
 404,140
 409,683
 101.4 %
General and administrative expense (2)
 49,215
 26,613
 22,602
 84.9 %
Depreciation and amortization 55,628
 43,542
 12,086
 27.8 %
Property and equipment impairment 
 6,305
 (6,305) (100.0)%
Goodwill impairment 
 1,177
 (1,177) (100.0)%
Loss on disposal of assets 39,086
 22,529
 16,557
 73.5 %
Interest expense 7,347
 20,387
 (13,040) (64.0)%
Gain on extinguishment of debt 
 (6,975) (6,975) (100.0)%
Other expense 1,025
 321
 704
 219.3 %
Income tax expense (benefit) 3,128
 (27,972) (31,100) (111.2)%
         
Net income (loss) $12,613
 $(53,147) $65,760
 123.7 %
         
Adjusted EBITDA (3)
 $137,443
 $7,816
 $129,627
 1,658.5 %
Adjusted EBITDA Margin (3)
 14.0% 1.8% 12.2% 677.8 %
   
  
    
Pressure pumping segment results of operations:        
Revenue $945,040
 $409,014
 $536,025
 131.1 %
Cost of services $784,349
 $379,815
 $404,534
 106.5 %
Adjusted EBITDA $145,122
 $15,656
 $129,466
 826.9 %
Adjusted EBITDA Margin (4)
 15.4% 3.8% 11.6% 305.3 %
____________________
(1)Exclusive of depreciation and amortization.
(2)Inclusive of stock‑based compensation.
(3)For definitions of the non‑GAAP financial measures of Adjusted EBITDA and Adjusted EBITDA margin and reconciliation of Adjusted EBITDA and Adjusted EBITDA margin to our most directly comparable financial measures calculated in accordance with GAAP, please read ““How We Evaluate Our Operations”.
(4)The non‑GAAP financial measure of Adjusted EBITDA margin for the pressure pumping segment is calculated by taking Adjusted EBITDA for the pressure pumping segment as a percentage of our revenues for the pressure pumping segment.

Revenue.  Revenue increased 124.7%, or $544.9 million, to $981.9 million for the year ended December 31, 2017, as compared to $436.9 million for the year ended December 31, 2016. The increase was primarily attributable to the increase in customer activity, fleet size and demand for our services, which led to an increase in pricing for our hydraulic fracturing and other services. Our pressure pumping segment revenues increased 131.1%, or $536.0 million for the year ended December 31, 2017,2021, as compared to the year ended December 31, 2016. Revenues from services other than pressure pumping increased 32.0%, or $8.92020.
Income Tax Benefit.  Income tax benefit was $14.3 million for the year ended December 31, 2017,2021, as compared to the year ended December 31, 2016. The increase in revenues from services other than pressure pumping during the year ended December 31, 2017 was primarily attributable to the increase in revenues and customer demand for our flowback, coil tubing and surface drilling services, offset by the decrease in revenue from idlingincome tax benefit of our drilling rigs.

Cost of Services.  Cost of services increased 101.4%, or $409.7 million, to $813.8$27.5 million for the year ended December 31, 2017, from $404.1 million during the year ended December 31, 2016. Cost of services2020. The reduction in our pressure pumping segment increased $404.5 million during the year ended December 31, 2017, as compared to the year ended December 31, 2016. The increases were primarily attributable to higher activity levels, coupled with an increase in personnel headcount following the increased activity levels. As a percentage of pressure pumping segment revenues, pressure pumping cost of services decreased to 83.0% for the year ended December 31, 2017, as compared to 92.9% for the year ended December 31, 2016. The decrease in cost of services as a percentage of revenue for the pressure pumping segment resulted from greater pricing power as demand for our services increased, without a corresponding increase in certain costs, which resulted in significantly higher realized Adjusted EBITDA margins during the year ended December 31, 2017.
General and Administrative Expenses.  General and administrative expenses increased 84.9%, or $22.6 million, to $49.2 million for the year ended December 31, 2017, as compared to $26.6 million for the year ended December 31, 2016. The net increase was primarily attributable to increases in payroll, insurance, advertising, communication, office expense, travel and legal costs, totaling $8.3 million, and an IPO bonus of $8.4 million to key employees, along with $7.8 million increase in stock compensationincome tax benefit recorded during the year ended December 31, 2017, and offset by2021 is primarily attributable to the Company projecting a decreasemuch lower pre-tax loss in property taxes of $1.6 million, and other remaining general and administrative expenses of $0.3 million. General and administrative expenses as a percentage of total revenues decreased to 5.0% for the year ended December 31, 2017,2021 as compared to 6.1% forthat in 2020. Furthermore, there was no significant change in the year ended December 31, 2016, excluding non-recurring deferred IPO bonus of $8.4 million and stock compensation expense of $6.8 million, general and administrative expenses as a percentage of total revenues decreased to 3.5% for the year ended December 31, 2017, as compared to 6.1% for the year ended December 31, 2016. The decrease in general and administrative expenses as a percentage of total revenue is as a result of the higher revenueeffective tax rate from 20.8% during the year ended December 31, 2017.
Depreciation and Amortization.  Depreciation and amortization increased 27.8%, or $12.1 million, to $55.6 million for the year ended December 31, 2017, as2021, compared to $43.5 million for the year ended December 31, 2016. The increase was primarily attributable to additional property and equipment purchased and put into service in the year ended December 31, 2017. We calculate depreciation of property and equipment using the straight-line method.
Property and Equipment Impairment Expense. There was no property and equipment impairment expense20.4% during the year ended December 31, 2017, compared to $6.3 million during the year ended December 31, 2016. The non‑cash impairment expense in 2016 was associated with our drilling rigs, and was recognized as a result of depressed commodity prices and a negative future near‑term outlook for these assets.2020.
Goodwill Impairment Expense. There was no goodwill impairment expense during the year ended December 31, 2017, compared to $1.2 million during the year ended December 31, 2016. The non‑cash goodwill impairment expense in 2016 was as a result of the write‑down of goodwill related to our surface drilling reporting unit.
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Loss on Disposal of Assets.  Loss on the disposal of assets increased 73.5%, or $16.6 million, to $39.1 million for the year ended December 31, 2017, as compared to $22.5 million for the year ended December 31, 2016. The increase was primarily attributable to greater service intensity of jobs completed, coupled with higher fleet size, activity levels and utilization of our equipment.

Interest Expense.  Interest expense decreased 64.0%, or $13.0 million, to $7.3 million for the year ended December 31, 2017, as compared to $20.4 million for the year ended December 31, 2016. The decrease in interest expense was primarily attributable to a reduction in our average debt balance during 2017 due to the early retirement of our term loan and revolving credit facility in the first quarter of 2017.

Gain on Extinguishment of Debt.  There was no debt extinguishment gain or loss during the year ended December 31, 2017, compared to the gain on extinguishment of debt, net of cost, of $7.0 million during the year ended December 31, 2016. The gain on extinguishment of debt during 2016 was as a result of the auction process with our lenders to repurchase $37.5 million of our term loan at a 20% discount to par value.

Other Expense.  Other expense was $1.0 million for the year ended December 31, 2017, as compared to $0.3 million for the year ended December 31, 2016. The increase was primarily attributable to an increase in lenders related expenses, non-recurring listing related expenses, and partially offset by an increase in the unrealized gain resulting from the change in the fair value of our interest rate swap liability at December 31, 2017 compared to December 31, 2016.
Income Tax Expense/(Benefit).  Income tax expense was $3.1 million for the year ended December 31, 2017, compared to income tax benefit of $28.0 million, for the year ended December 31, 2016. The change from an income tax benefit to income tax expense is primarily due to the Company’s reporting income before taxes during the year ended December 31, 2017, compared to a loss before taxes recorded during the year ended December 31, 2016. The income before taxes generated is attributable to the increase in our revenue during the year ended December 31, 2017, compared to December 31, 2016. Additionally, the income tax expense during the year ended December 31, 2017, included a one-time deferred tax benefit offset of $3.4 million, resulting from the U.S. government enacted tax legislation commonly referred to as the Tax Cuts and Jobs Act (“Tax Act”). 
Liquidity and Capital Resources
Our liquidity is currently provided by (i) existing cash balances, (ii) operating cash flows and (iii) borrowings under our revolving credit facility ("ABL Credit Facility.Facility"). Our primary uses of cash will be to continueis primarily used to fund our operations, support growth opportunities and satisfy debt payments.payments, if any. Our borrowing base, as redetermined monthly, is tied to 85.0% of eligible accounts receivable (the "borrowing base"). Our borrowing base as of December 31, 2021 was approximately $61.1 million and was approximately $79.0 million as of February 18, 2022. Changes to our operational activity levels have an impact on our total eligible accounts receivable, which could result in significant changes to our borrowing base and therefore our availability under our ABL Credit Facility. We believe our remaining monthly availability under our ABL Credit Facility will be adversely impacted if oil and gas market conditions decline in the future.
          As of December 31, 2018,2021, we had no borrowings under our ABL Credit Facility and our total liquidity consistswas $169.3 million, consisting of cash and cash equivalents of $132.7$111.9 million and $125.0$57.4 million of availability under our ABL Credit Facility.
          As of February 18, 2022, we had no borrowings under our ABL Credit Facility and our total liquidity was approximately $151.3 million, consisting of cash and cash equivalents of $76.0 million and $75.3 million of availability under our ABL Credit Facility.
           In 2020 when demand for our services was significantly depressed following the rapidly rising health crisis associated with the COVID-19 pandemic and the energy industry disruptions, the Company experienced a significant decrease in its liquidity. However, with the gradual recovery in the energy industry and increase in demand for our services in 2021, our liquidity position has gradually improved and this improvement has continued into the beginning of 2022, as market conditions have continued to improve, although we expect our overall liquidity to decline during 2022 as we make additional capital investments. Moreover, the current market conditions resulting from the COVID-19 pandemic have and may in the future change rapidly and there could be a new outbreak of a COVID-19 variant that could result in travel restrictions, business closure and institution of quarantining and/or other activity restrictions, which could negatively impact our future operations, revenue, profitability and cash flows if not contained or if the vaccines currently distributed and administered to people are not as effective as anticipated in curbing the spread of any such new COVID-19 variant.
There can be no assurance that our operations and other capital resources will provide cash in sufficient amounts to maintain planned or future levels of capital expenditures. Future cash flows are subject to a number of variables, and are highly dependent on the drilling, completion, and production activity by our customers, which in turn is highly dependent on oil and natural gas prices. Depending upon market conditions and other factors, we may issue equity and debt securities or take other actions necessary to fund our business or meet our future long-term liquidity requirements.
Cash and Cash Flows
The following table sets forth our net cash provided by (used in) operating, investing and financing activities during the year atyears ended December 31, 2018, 20172021 and 2016,2020, respectively.
Year Ended December 31,Year Ended December 31,
($ in thousands)2018 2017 2016($ in thousands)20212020
Net cash provided by operating activities$393,079
 $109,257
 $10,659
Net cash provided by operating activities$154,714 $139,124 
Net cash used in investing activities$(280,604) $(281,469) $(41,688)Net cash used in investing activities$(104,292)$(94,217)
Net cash (used in) provided by financing activities$(3,724) $62,565
 $130,315
Net cash used in financing activitiesNet cash used in financing activities$(7,276)$(125,171)
Operating Activities
Net cash provided by operating activities was $393.1$154.7 million for the year ended December 31, 2018,2021, as compared to $109.3$139.1 million for the year ended December 31, 2017.2020. The net increase of $283.8$15.6 million was primarily due to the reduction in our net loss, resulting from an increase in our revenue generating assets (fleet size), which has resultedactivity levels in increases2021, and the rebound from the depressed oil prices and economic slowdown caused by the COVID-19 pandemic that negatively impacted our
operations in revenue and2020. The net incomeincrease in the year, offset by our working capital needs resulting from higher fleet size and expanding activity levels.
Net cash provided by operating activities was $109.3 million for the year ended December 31, 2017, as compared to $10.7 million for the year ended December 31, 2016. The net increase of $98.6 million was primarily due to an increase in revenue and net income in the year, resulting from an increase in customer activity, fleet size and demand for our services, and partially offsetalso slightly impacted by the increase intiming of our working capital needs resultingreceivable collections from higher fleet sizeour customers and expanding activity levels.

payment to our vendors.
Investing Activities
Net cash used in investing activities decreased to $280.6 million for the year ended December 31, 2018, from $281.5 million for the year ended December 31, 2017. The slight decrease was primarily attributable to the decrease in cash payment for capital expenditures during the year ended December 31, 2018, compared to the year ended December 31, 2017.
Net cash used in investing activities increased to $281.5$104.3 million for the year ended December 31, 2021, from $94.2 million for the year ended December 31, 2017,2020. The net increase in our cash used in investing activities was primarily attributable to our investment in Tier IV DGB equipment. Included in our net cash used for investing activities in 2021 was a cash payment of $45.3 million for new Tier IV DGB equipment. The remaining cash payments in 2021 were incurred in connection with our maintenance capital expenditures and other growth initiatives. Our cash flow from $41.7investing activities was partially offset by $36.0 million of cash generated from the sale of our two turbine generators in December 2021.
Financing Activities
          Net cash used in financing activities was $7.3 million for the year ended December 31, 2016. The increase was primarily attributable to the additional hydraulic fracturing units and other ancillary equipment purchased and a marginal increase in maintenance capital expenditures, during the year ended December 31, 2017,2021, compared to the year ended December 31, 2016.
Financing Activities
Netnet cash used in financing activities was $3.7of $125.2 million for the year ended December 31, 2018, compared to2020. The net decrease in cash provided of $62.6 million for the year ended December 31, 2017. Our net cash used inflow from financing activities during the year ended December 31, 20182021 was primarily driven by cash used forno borrowings or repayments under our ABL Credit Facility in 2021 compared to repayment of borrowings of $80.9 million, repayment of insurance financing of $4.5 million, debt issuance cost of $1.7 million, which was partially offset by cash proceeds from insurance financing $5.8 million and borrowings of $77.4 million. Our net cash provided by financing activities during the year ended December 31, 2017 was primarily from borrowings of $60.0 million, insurance financing proceeds of $4.1 million and initial public offerings (IPO) proceeds of $185.5 million, partially offset by repayment of borrowings of $166.5 million, repayment of insurance financing of $3.8 million, debt issuance of $1.7 million and IPO costs of $15.1 million.
Net cash provided by financing activities was $62.6 million for the year ended December 31, 2017, compared to $130.3 million for the year ended December 31, 2016. The net decrease in cash provided from financing activities was primarily attributable to the repayment of borrowings $166.5 million, repayment of insurance financing of $3.8 million, debt issuance cost of $1.7 million, payment of IPO costs of $15.1 million and offset by the receipt of $185.5 million of IPO proceeds, insurance financing proceeds of $4.1 million and proceeds from borrowings of $60.0$130.0 million during the year ended December 31, 2017, compared to2020. During the year ended December 31, 2021, net cash used of $71.3 million for repayment of borrowings, repayment ofoutflow in connection with insurance financing of $4.5was approximately $5.5 million, payment of preferred equity financing costs of $7.5 million, debt extinguishment, debt issuance and IPO costs of $1.0 million, offset by insurance financing proceeds of $4.1 million, equity capitalization proceeds of $40.4 million and proceeds from preferred equity capitalization of $170.0 millionwhereas during the year ended December 31, 2016.2020 we received net cash inflow of $5.5 million.
Credit Facility and Other Financing Arrangements
ABL Credit Facility
On March 22, 2017, we entered into a new revolving credit facility with a $150 million borrowing capacity, or the ABL Credit Facility. Borrowings under the          Our ABL Credit Facility, accrue interest based onas amended, has a three-tier pricing grid tiedtotal borrowing capacity of $300 million (subject to availability, and we may elect for loans to be based on either LIBOR orthe borrowing base rate, plus the applicable margin, which ranges from 1.75% to 2.25% for LIBOR loans and 0.75% to 1.25% for base rate loans,limit), with no LIBOR floor. Borrowings under the ABL Credit Facility are secured by a first priority lien and security interest in substantially all assetsmaturity date of the Company.December 19, 2023. The ABL Credit Facility has a term of 5 years and a borrowing base of 85% of monthly eligible accounts receivable less customary reserves. The borrowing base as of December 31, 2021 was approximately $61.1 million. The ABL Credit Facility includes a Springing Fixed Charge Coverage Ratio to apply when excess availability is less than the greater of (i) 10% of the lesser of the facility size or the Borrowing Base or (ii) $22.5 million. Under this facility we are required to comply, subject to certain exceptions and materiality qualifiers, with certain customary affirmative and negative covenants, including, but not limited to, covenants pertaining to our ability to incur liens, indebtedness, changes in the nature of our business, mergers and other fundamental changes, disposal of assets, investments and restricted payments, amendments to our organizational documents or accounting policies, prepayments of certain debt, dividends, transactions with affiliates, and certain other activities. In addition,Borrowings under the ABL Credit Facility includesare secured by a Springing Fixed Charge Coverage Ratio of 1.0x when excess availability is less than the greater of (i) 10%first priority lien and security interest in substantially all assets of the lesser of the facility size and the Borrowing Base and (ii) $12 million. The ABL has a commitment fee of 0.375%, which reduces to 0.25% if utilization is greater than 50% of the borrowing base.Company.

On February 22, 2018, we entered into a first amendment with our lenders to increase the capacity of the ABL Credit Facility. The amendment increased total capacity           Borrowings under the facility from $150.0 million to $200.0 million. The first amendment to ABL Credit Facility modified the Springing Fixed Charge Coverage Ratio to apply when excess availability is less than the greater of (i) 10% of the lesser of the facility size and the Borrowing Base and (ii) $15 million.
On December 19, 2018, we entered into a second amendment with our lenders to further increase the capacity of the ABL Credit Facility. The second amendment increased total capacity under the facility from $200.0 million to $300.0 million and extended the maturity date of the ABL Credit Facility accrue interest based on a three-tier pricing grid tied to availability, and we may elect for loans to be based on either LIBOR or base rate, plus the applicable margin, which ranges from March 22, 2022 until December 19, 2023. The second amendment1.75% to the ABL Credit Facility further modified the Springing Fixed Charge Coverage Ratio2.25% for LIBOR loans and 0.75% to apply when excess availability is less than the greater1.25% for base rate loans, with a LIBOR floor of (i) 10% of the lesser of the facility size and the Borrowing Base and (ii) $22.5 million.zero.
Equipment Financing Arrangements
On November 24, 2015, we entered into a 36‑month equipment financing arrangement for three hydraulic fracturing units, and received proceeds of $25.0 million. A portion of the proceeds were used to pay off manufacturer notes, and the remainder was used for additional liquidity.    As of December 31, 2018,2021, we have fully repaid allhad no borrowings outstanding balance and met all obligations under this financing arrangement
On June 30, 2017, we entered into a financing arrangement for the purchase of light vehicles. As of December 31, 2018, we have fully repaid all outstanding balance and met all obligations under this financing arrangement.our ABL Credit Facility.
Off Balance Sheet Arrangements
We had no material off balance sheet arrangements as of December 31, 2018.2021.
Capital Requirements, Future Sources and Use of Cash
Capital expenditures incurred were $592.6$165.2 million during the year ended December 31, 2018,2021, as compared to $305.3$81.2 million during the year ended December 31, 2017. The increase was primarily attributable to our acquisition of Pioneer’s pressure pumping assets, which includes eight hydraulic fracturing fleets, four coiled tubing units and an associated equipment maintenance building.
Capital expenditures incurred were $305.3 million during2020. During the year ended December 31, 20172020, we reduced our capital expenditures following the depressed demand for our pressure pumping services as compareda result of the COVID-19 pandemic and depressed energy market. The significant portion of our total capital expenditures were comprised of maintenance capital expenditures.
          Our future material use of cash will be to $46.0fund our capital expenditures. Capital expenditures for 2022 are projected to be primarily related to maintenance capital expenditures to support our existing pressure pumping assets, costs to convert some existing equipment to lower emissions pressure pumping equipment, strategic purchases and other ancillary equipment purchases, subject to market conditions and customer demand. Our future capital expenditures depend on our projected operational activity, emission requirements and planned conversions to lower emissions equipment, among other factors, which could vary significantly throughout the year. Based on our current plan and projected activity levels for 2022, we expect our capital expenditures to range between $250.0 million to $300.0 million. We could incur significant additional capital expenditures if our projected activity levels increase during the course of the year, ended Decemberinflation and supply chain tightness continues to adversely impact on our operations or we invest in new or different lower emissions equipment. The Company will continue to evaluate the emissions profile of its fleet over the coming years and may, depending on market conditions, convert or retire additional conventional Tier II equipment in favor of lower emissions equipment. The Company’s decisions regarding the retirement or conversion of equipment or the addition of lower emissions equipment will be subject to a number of factors, including (among other factors) the availability of equipment, including parts and major components, supply chain disruptions, prevailing and expected commodity prices, customer demand and requirements and the Company’s evaluation of projected returns on conversion or other capital expenditures.Depending on the impacts of these factors, the Company may decide to retain conventional equipment for a longer period of time or accelerate the retirement, replacement or conversion of that equipment.
In addition, we have option agreements with our equipment manufacturer to purchase an additional 108,000 HHP of DuraStim® hydraulic fracturing equipment through July 31, 2016. The increase was primarily attributable2022.
          We anticipate our capital expenditures will be funded by existing cash, cash flows from operations, and if needed, borrowings under our ABL Credit Facility. Our cash flows from operations will be generated from services we provide to additional propertyour customers and equipment purchased.idle fees if a customer (Pioneer) decides to idle committed fleets and we are not able to deploy the idled fleets to another customer. During times when there is a significant reduction in overall demand for our services, the idle fees could represent a material portion of our revenues and cash flows from operations.
Contractual Obligations
The following table presents our contractual obligations and other commitments as of December 31, 2018.2021:
($ in thousands)  Payment Due by Period($ in thousands) Period
Total 
1 year or less
 2 - 3 years 4 - 5 years More than
5 years
Total 1 year or lessMore than I year
ABL Credit Facility (1)
$70,000
 $
 $
 $70,000
 $
ABL Credit Facility (1)
$— $— $— 
Operating leases(2)
5,313
 892
 1,442
 2,979
 
Operating leases(2)
487 389 98 
Total contractual obligations$75,313
 $892
 $1,442
 $72,979
 $
TotalTotal$487 $389 $98 
____________________
(1)The ABL Credit Facility balance outstanding is exclusive of future commitment fees, interest or other fees since our potential future obligations thereunder are based on future events and cannot be reasonably estimated.
(1)As of December 31, 2021, we had no borrowings under our ABL Credit Facility. If we decide to borrow from our ABL Credit Facility in the future, interest expense will be charged based on the agreed contractual interest rates. However, we are obligated to pay agency and commitment fees on unused balance which could be up to approximately $1.2 million annually, depending on our utilization of the ABL Credit Facility.
(2)Operating leases includeexclude short-term leases and other commitments (see Note 14. Leases and Note 15. Commitments and Contingencies in the financial statements for additional disclosures).

We enter into purchase agreements with Sand suppliers to secure supply of sand in the normal course of our business. The agreements with the Sand suppliers require that we purchase minimum volume of sand, based primarily on a certain percentage of our sand requirements from our customers or in certain situations based on predetermined fixed minimum volumes, otherwise certain penalties (shortfall fees) may be charged. The shortfall fee represents liquidated damages and is either a fixed percentage of the purchase price for various officethe minimum volumes or a fixed price per ton of unpurchased volumes. Our current agreements with Sand suppliers expire at different times prior to December 31, 2025. Our agreed upon sand requirements or minimum volumes are based on certain future events such as our customer demand, which cannot be reasonably estimated. If the activity level of our customers declines and maintenance locations.the future demand for our services is materially and adversely affected, we may be required to pay for more sand from one of our Sand suppliers than we need in the performance of our services, regardless of whether we take physical delivery of such sand. In such an event, we may be required to pay shortfall fees or other penalties under the purchase agreement, which could have a material adverse effect on our business, financial condition, or results of operations.


Recent Accounting Pronouncements
Disclosure concerning recently issued accounting standards is incorporated by reference to "Note 22- Significant Accounting Policies" of our Consolidated Financial Statements contained in this Form 10-K.Annual Report.
Critical Accounting Policies and Estimates
The discussion and analysis of our financial condition and results of operations is based on our consolidated financial statements, which have been prepared in accordance with accounting principles generally acceptable in the United States of America. The preparation of these financial statements requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the dates of the financial statements and the reported revenues and expenses during the years. We evaluate these estimates and assumptions on an ongoing basis and base our estimates on historical experience, current conditions and various other assumptions that we believe to be reasonable under the circumstances. The results of these estimates form the basis for making judgments about the carrying values of assets and liabilities as well as identifying and assessing the accounting treatment with respect to commitments and contingencies. Our actual results may materially differ from these estimates.
Listed below are the accounting policies that we believe are critical to our financial statements due to the degree of uncertainty regarding the estimates or assumptions involved, and that we believe are critical to the understanding of our operations.
Property and Equipment
Our property and equipment are recorded at cost, less accumulated depreciation.
Upon sale or retirement of property and equipment, the cost and related accumulated depreciation are removed from the balance sheet and the net amount, less proceeds from disposal, is recognized as a gain or loss in earnings.
We primarily retired certain components of equipment such as fluid ends and power ends, rather than the entire pieces of equipment, which resultedand the associated loss is recorded in aour statement of operations as part of net loss on disposal of assets, of $59.2which was $64.6 million, $39.1 $58.1 million and $22.5$106.8 million for the years ended December 31, 2018, 20172021, 2020 and 2016,2019, respectively.
Depreciation of property and equipment is provided on the straight‑line method over estimated useful lives as shown in the table below.
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          The estimated useful lives and salvage values of property and equipment is subject to key assumptions such as maintenance, utilization and job variation. Unanticipated future changes in these assumptions could negatively or positively impact our net income.income (loss). A 10% change in the useful lives of our property and equipment would have resulted in approximately $8.8$13.3 million impact on pre-tax incomeloss during the year ended December 31, 2018.
2021. Depreciation of property and equipment is provided on the straight‑line method over estimated useful lives as shown in the table below.
LandIndefinite
Buildings and property improvements5 - 30 years
Vehicles1 ‑ 5 years
Equipment1 ‑ 20 years
Leasehold improvements5 ‑ 20 years
Impairment of Long-Lived Assets
In accordance with the Financial Accounting Standards Board ("FASB") Accounting Standards Codification (ASC)("ASC") 360 regarding Accounting for the Impairment or Disposal of Long‑Lived Assets, we review the long‑lived assets to be held and used whenever events or circumstances indicate that the carrying value of those assets may not be recoverable. An impairment loss is indicated if the sum of the expected future undiscounted cash flows attributable

to the assets is less than the carrying amount of such assets. In this circumstance, we recognize an impairment loss for the amount by which the carrying amount of the assetassets exceeds the estimated fair value of the asset. Our cash flow forecasts require us to make certain judgementsjudgments regarding long‑term forecasts of future revenue and costs and cash flows related to the assets subject to review. The significant assumption in our cash flow forecasts is our future growth expectations.estimated equipment utilization and profitability. The significant assumption is uncertain in that it is driven by future demand for our services and utilization, which could be impacted by crude oil market prices, future market conditions and technological advancements. Our fair value estimates for certain long‑lived assets require us to use significant other observable inputs, among others, including significant assumptions related to market approach based on recent auction sales or selling prices of comparable equipment. The estimates of fair value are also subject to significant variability, are sensitive to changes in market conditions, and are reasonably likely to change in the future. No events or changes in circumstances occurred that would indicate an impairment of our property and equipment during the year ended December 31, 2018.
If the crude oil market declines or the demand for vertical drillingour services does notnot recover, and if theour equipment remains idle or under‑utilized, the estimated fair value of such equipment may decline, which could result in future impairment charges. Though the impacts of variations in any of these factors can have compounding or off‑setting impacts, a 10% decline in the estimated fair value of our drilling assets at December 31, 2018 would result in additional impairment of $0.5 million, and a 10% decline in the estimated future cash flows forof our otherexisting asset groups wouldwill not indicate an impairment.
          Our DuraStim® equipment is yet to be commercialized. If we are not able to successfully commercialize the DuraStim® equipment, and are not able to deploy the equipment for alternative uses, we will incur impairment losses on the carrying value of the DuraStim® equipment. As of December 31, 2021, the carrying value of our DuraStim® equipment is approximately $90 million.
Goodwill
          Goodwill is the excess of the consideration transferred over the fair value of the tangible and identifiable intangible assets and liabilities recognized. Goodwill is not amortized. We perform an annual impairment test of goodwill as of December 31, or more frequently if circumstances indicate that impairment may exist.
          There were no additions to, or disposal of, goodwill during the year ended December 31, 2021. The quantitative impairment test we perform for goodwill utilizes certain assumptions, including forecasted active fleet revenue and cost assumptions. Our discounted cash flow analysis includes significant assumptions regarding discount rates, fleet utilization, expected profitability margin, forecasted maintenance capital expenditures, the timing of an anticipated market recovery, and the timing of expected cash flow. As such, our goodwill analysis incorporates inherent uncertainties that are difficult to predict in volatile economic environments and could result in impairment charges in future periods if actual results materially differ from the estimated assumptions utilized in our forecast. In March 2020, crude oil prices declined significantly, an indication that a triggering event has occurred, and as such, we recorded in our pressure pumping reportable segment, goodwill impairment expense of $9.4 million
46


during the year ended December 31, 2020. There was no carrying value for goodwill in our balance sheet as of December 31, 2021 because our goodwill carrying value was fully written off during 2020.
Income Taxes
Income taxes are accounted for under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the consolidated financial statements. Under this method, deferred tax assets and liabilities are determined on the basis of differences between the consolidated financial statements and tax bases of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date.
We recognize deferred tax assets to the extent that we believe these assets are more likely than not to be realized. In making such a determination, we consider all positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, and the results of recent operations. If we determine that we would not be able to fully realize our deferred tax assets in the future in excess of their net recorded amount, we would make an adjustment to the deferred tax assetrecord a valuation allowance, which would reduce theincrease our provision for income taxes. In determining the reasonableness of our need for a valuation allowance as of December 31, 2018,2021, we have considered and made judgments and estimates regarding estimated future taxable income. These estimates and judgments include some degree of uncertainty and changes in these estimates and assumptions could require us to adjust therecord additional valuation allowances for our deferred tax assets and the ultimate realization of tax assets depends on the generation of sufficient taxable income.
On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (“Tax Act”).  The Tax Act makes broad and complex changes to the U.S. tax code including, but not limited to (1) reducing the U.S. federal corporate tax rate from 35% to 21%, (2) eliminating the corporate alternative minimum tax (AMT) and changing how existing AMT credits can be realized, (3) creating a new limitation on deductible interest expense, (4) changes to bonus depreciation, and (5) changing rules related to use and limitations of net operating loss carryforwards for tax years beginning after December 31, 2017.  The only material items that impacted the Company’s consolidated financial statements in 2017 were bonus depreciation and the corporate rate reduction.  While the corporate rate reduction is effective January 1, 2018, we accounted for this anticipated rate change during the year ended December 31, 2017, the year of enactment.  Consequently, we recorded a $3.4 million decrease to the net deferred tax liability, with a corresponding net adjustment to deferred tax benefit in our consolidated financial statements for the year ended December 31, 2017.
Our methodology for recording income taxes requires a significant amount of judgment in the use of assumptions and estimates. Additionally, we forecast certain tax elements, such as future taxable income, as well as

evaluate the feasibility of implementing tax planning strategies. Given the inherent uncertainty involved with the use of such variables, there can be significant variation between anticipated and actual results. Unforeseen events may significantly impact these variables, and changes to these variables could have a material impact on our income tax accounts. The final determination of our income tax liabilities involves the interpretation of local tax laws and related authorities in each jurisdiction. Changes in the operating environments, including changes in tax law, could impact the determination of our income tax liabilities for a tax year.

47


Item 7A.Quantitative and Qualitative Disclosure of Market Risks
MarketForeign Currency Exchange Risk
          Our operations are currently conducted entirely within the U.S; therefore, we had no significant exposure to foreign currency exchange risk is the risk of loss arising from adverse changes in market rates and prices. Historically, our risks have been predominantly related to potential changes in the fair value of our long‑term debt due to fluctuations in applicable market interest rates. Going forward our market risk exposure generally will be limited to those risks that arise in the normal course of business, as we do not engage in speculative, non‑operating transactions, nor do we utilize financial instruments or derivative instruments for trading purposes.2021.
Commodity Price Risk
Our material and fuel purchases expose us to commodity price risk. Our material costs primarily include the cost of inventory consumed while performing our pressure pumping services such as proppants, chemicals, guar, trucking and fluid supplies. Our fuel costs consist primarily of diesel fueland natural gas used by our various trucks and other motorized equipment. The prices for fuel and the raw materials in our inventory are volatile and are impacted by changes in supply and demand, as well as market uncertainty and regional shortages. Historically, we have generally been able to pass along a significant portion of our commodity price increasesrisk to our customers; however, we may be unable to do so in the future. We do not engage in commodity price hedging activities.
Interest Rate Risk
We may be subject to interest rate risk on variable rate debtborrowings under our credit facility.ABL Credit Facility. We do not currently engage in interest rate derivatives to hedge our interest rate risk. The impact of a 1% increase in interest rates on our variable rate debt as of December 31, 2018, 2017 and 2016 would have resulted in an increase in interest expense and corresponding (increase)/decrease in pre‑tax (loss)/income of approximately $0.7 million, $0.2$0, $0.4 million and $2.1$1.3 million, for the years ended December 31, 2018, 20172021, 2020 and 2016,2019, respectively.
Credit Risk
Financial instruments that potentially subject us to concentrations of credit risk are trade receivables. We extend credit to customers and other parties in the normal course of business. We have established various procedures to manage our credit exposure, including credit evaluations and maintaining an allowance for doubtful accounts.


MANAGEMENT’S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING
The management of ProPetro Holding Corp. is responsible for establishing and maintaining adequate internal control over financial reporting for the Company. ProPetro Holding Corp. maintains a system of internal accounting controls designed to provide reasonable assurance, at a reasonable cost, that assets are safeguarded against loss or unauthorized use and that the financial records are adequate and can be relied upon to produce financial statements in accordance with accounting principles generally accepted in the United States of America. The internal control system is augmented by written policies and procedures, an internal audit program and the selection and training of qualified personnel. This system includes policies that require adherence to ethical business standards and compliance with all applicable laws and regulations.
There are inherent limitations to the effectiveness of any controls system. A controls system, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that the objectives of the controls system are met. Also, no evaluation of controls can provide absolute assurance that all control issues and any instances of fraud, if any, within the Company will be detected. Further, the design of a controls system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. The Company intends to continually improve and refine its internal controls.
Under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, we conducted an evaluation of the effectiveness of the design and operations of our internal control over financial reporting as of December 31, 2018 based on criteria established in the 2013 Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). Based on this evaluation, management’s assessment is that ProPetro Holding Corp. maintained effective internal control over financial reporting as of December 31, 2018. The independent registered public accounting firm, Deloitte & Touche LLP, has audited the consolidated financial statements as of and for the year ended December 31, 2018, and has also issued their report on the effectiveness of the Company’s internal control over financial reporting, included in this report on page 50.

48
 /s/ Dale Redman
Dale Redman
Chief Executive Officer and Director
(Principal Executive Officer)

 /s/ Jeffrey Smith
Jeffrey Smith
Chief Financial Officer
(Principal Financial Officer)

Midland, Texas
February 28, 2019


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholders and the Board of Directors of
ProPetro Holding Corp. and Subsidiary

Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of ProPetro Holding Corp. and Subsidiary (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of income, shareholders' equity and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with, accounting principles generally accepted in the United States of America.
We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2018, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 28, 2019, expressed an unqualified opinion on the Company's internal control over financial reporting.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ DELOITTE & TOUCHE LLP
Houston, Texas
February 28, 2019
We have served as the Company's auditor since 2013.

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholders and the Board of Directors of
ProPetro Holding Corp. and Subsidiary

Opinion on Internal Control over Financial Reporting
We have audited the internal control over financial reporting of ProPetro Holding Corp. and Subsidiary (the “Company”) as of December 31, 2018, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2018, based on criteria established in Internal Control - Integrated Framework (2013) issued by COSO.
We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated financial statements as of and for the year ended December 31, 2018, of the Company and our report dated February 28, 2019, expressed an unqualified opinion on those financial statements.
Basis for Opinion
The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.
Definition and Limitations of Internal Control over Financial Reporting
A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.
/s/ DELOITTE & TOUCHE LLP
Houston, Texas
February 28, 2019



50



Item 8. Financial Statements and Supplementary Data.

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the Shareholders and the Board of Directors of
ProPetro Holding Corp. and Subsidiary

Opinion on the Financial Statements
          We have audited the accompanying consolidated balance sheets of ProPetro Holding Corp. and Subsidiary (the "Company") as of December 31, 2021 and 2020, the related consolidated statements of operations, shareholders' equity, and cash flows, for each of the three years in the period ended December 31, 2021, and the related notes (collectively, referred to as, the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2021 and 2020, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2021, in conformity with accounting principles generally accepted in the United States of America.
          We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2021, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 25, 2022, expressed an unqualified opinion on the Company's internal control over financial reporting.
Basis for Opinion
          These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
          We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.
Critical Audit Matter
          The critical audit matter communicated below is a matter arising from the current-period audit of the financial statements that was communicated or required to be communicated to the audit committee and that (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.
Related-party transactions — Refer to Note 13 to the consolidated financial statements
Critical Audit Matter Description
          The Company engages in various related party transactions, including leasing real estate, renting equipment, purchasing assets, obtaining equipment maintenance and repair services, and providing pressure pumping and related services.
          We identified related-party transactions as a critical audit matter because of the number of related-party transactions and potential conflicts of interest. As a result, we believe the risk that related-party transactions were not timely identified and properly disclosed by the Company in the financial statements was elevated and required us to
49


exercise significant auditor judgment and an increased extent of effort when designing and performing audit procedures on related-party transactions.
How the Critical Audit Matter Was Addressed in the Audit
          Our audit procedures for related-party transactions included the following, among others:
We evaluated the completeness of related-party transactions by obtaining the Company’s list of related-party relationships and transactions and performing the following:
Comparing it to public filings, external news, third-party information or research reports, questionnaires completed by the Company’s directors and officers, and other sources.
Searching for potential related-party transactions within the accounts receivable, accounts payable, and vendor listings master files and journal entries by searching for the name, vendor identification numbers, and customer identification numbers of the related parties.
Inspecting the Company’s minutes from meetings of the Board of Directors and related committees.
Making inquiries of executive officers, key members of management, and the Audit Committee of the Board of Directors regarding related party transactions.
/s/ DELOITTE & TOUCHE LLP
Houston, Texas
February 25, 2022
We have served as the Company's auditor since 2013.

50


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the Shareholders and the Board of Directors of
ProPetro Holding Corp. and Subsidiary
Opinion on Internal Control over Financial Reporting
          We have audited the internal control over financial reporting of ProPetro Holding Corp. and Subsidiary (the "Company") as of December 31, 2021, based on criteria established in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2021, based on criteria established in Internal Control—Integrated Framework (2013) issued by COSO.
We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated financial statements as of and for the year ended December 31, 2021, of the Company and our report dated February 25, 2022, expressed an unqualified opinion on those consolidated financial statements.
Basis for Opinion
The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the US federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.
Definition and Limitations of Internal Control over Financial Reporting
A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.
/s/ DELOITTE & TOUCHE LLP
Houston, Texas
February 25, 2022
51



PROPETRO HOLDING CORP. AND SUBSIDIARY
CONSOLIDATED BALANCE SHEETS
AS OF DECEMBER 31, 20182021 AND 20172020
(In thousands, except share data)
20212020
ASSETS
CURRENT ASSETS:
Cash and cash equivalents$111,918 $68,772 
Accounts receivable - net of allowance for credit losses of $217 and $1,497, respectively128,148 84,244 
Inventories3,949 2,729 
Prepaid expenses6,752 11,199 
Other current assets297 782 
Total current assets251,064 167,726 
PROPERTY AND EQUIPMENT - Net of accumulated depreciation808,494 880,477 
OPERATING LEASE RIGHT-OF-USE ASSETS409 709 
OTHER NONCURRENT ASSETS:
Other noncurrent assets1,269 1,827 
Total other noncurrent assets1,269 1,827 
TOTAL ASSETS$1,061,236 $1,050,739 
LIABILITIES AND SHAREHOLDERS’ EQUITY
CURRENT LIABILITIES:
Accounts payable$152,649 $79,153 
Accrued and other current liabilities20,767 24,676 
Operating lease liabilities369 334 
Total current liabilities173,785 104,163 
DEFERRED INCOME TAXES61,052 75,340 
NONCURRENT OPERATING LEASE LIABILITIES97 465 
Total liabilities234,934 179,968 
COMMITMENTS AND CONTINGENCIES (Note 15)00
SHAREHOLDERS’ EQUITY:
Preferred stock, $0.001 par value, 30,000,000 shares authorized, none issued, respectively— — 
Common stock, $0.001 par value, 200,000,000 shares authorized, 103,437,177 and 100,912,777 shares issued, respectively103 101 
Additional paid-in capital844,829 835,115 
(Accumulated deficit) Retained earnings(18,630)35,555 
Total shareholders’ equity826,302 870,771 
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY$1,061,236 $1,050,739 
See notes to consolidated financial statements. 52
 2018 2017
ASSETS   
CURRENT ASSETS:   
Cash and cash equivalents$132,700
 $23,949
Accounts receivable - net of allowance for doubtful accounts of $100 and $443, respectively202,956
 199,656
Inventories6,353
 6,184
Prepaid expenses6,610
 5,123
Other current assets638
 748
Total current assets349,257
 235,660
PROPERTY AND EQUIPMENT - Net of accumulated depreciation912,846
 470,910
OTHER NONCURRENT ASSETS:   
Goodwill9,425
 9,425
Intangible assets - net of amortization13
 301
Deferred revenue rebate - net of amortization
 615
Other noncurrent assets2,981
 2,121
Total other noncurrent assets12,419
 12,462
TOTAL ASSETS$1,274,522
 $719,032
LIABILITIES AND SHAREHOLDERS’ EQUITY   
CURRENT LIABILITIES:   
Accounts payable$214,460
 $211,149
Accrued liabilities138,089
 16,607
Current portion of long-term debt
 15,764
Accrued interest payable211
 76
Total current liabilities352,760
 243,596
DEFERRED INCOME TAXES54,283
 4,881
LONG-TERM DEBT70,000
 57,178
OTHER LONG-TERM LIABILITIES124
 125
Total liabilities477,167
 305,780
COMMITMENTS AND CONTINGENCIES (Note 17)

 

SHAREHOLDERS’ EQUITY:   
Preferred stock, $0.001 par value, 30,000,000 shares authorized, none issued, respectively
 
Common stock, $0.001 par value, 200,000,000 shares authorized,100,190,126 and 83,039,854 shares issued, respectively100
 83
Additional paid-in capital817,690
 607,466
Accumulated deficit(20,435) (194,297)
Total shareholders’ equity797,355
 413,252
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY$1,274,522
 $719,032



PROPETRO HOLDING CORP. AND SUBSIDIARY
CONSOLIDATED STATEMENTS OF OPERATIONS

FOR THE YEARS ENDED
DECEMBER 31, 20182021, 20172020 AND2016 2019
(In thousands, except per share data)
202120202019
REVENUE - Service revenue
$874,514 $789,232 $2,052,314 
COSTS AND EXPENSES:
Cost of services (exclusive of depreciation and amortization)
662,266 584,279 1,470,356 
General and administrative (inclusive of stock‑based compensation)82,921 86,768 105,076 
Depreciation and amortization133,377 153,290 145,304 
Impairment expense— 38,002 3,405 
Loss on disposal of assets64,646 58,136 106,811 
Total costs and expenses943,210 920,475 1,830,952 
OPERATING (LOSS) INCOME(68,696)(131,243)221,362 
OTHER EXPENSE:
Interest expense(614)(2,383)(7,141)
Other Income /(expense)873 (874)(717)
Total other Income /(expense)259 (3,257)(7,858)
(LOSS) INCOME BEFORE INCOME TAXES(68,437)(134,500)213,504 
INCOME TAX BENEFIT/ (EXPENSE)14,252 27,480 (50,494)
NET (LOSS) INCOME$(54,185)$(107,020)$163,010 
NET (LOSS) INCOME PER COMMON SHARE:
Basic$(0.53)$(1.06)$1.62 
Diluted$(0.53)$(1.06)$1.57 
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic102,655 100,829 100,472 
Diluted102,655 100,829 103,750 
 2018 2017 2016
REVENUE - Service revenue$1,704,562
 $981,865
 $436,920
COSTS AND EXPENSES:     
Cost of services (exclusive of depreciation and amortization)1,270,577
 813,823
 404,140
General and administrative (inclusive of stock‑based compensation)53,958
 49,215
 26,613
Depreciation and amortization88,138
 55,628
 43,542
Property and equipment impairment expense
 
 6,305
Goodwill impairment expense
 
 1,177
Loss on disposal of assets59,220
 39,086
 22,529
Total costs and expenses1,471,893
 957,752
 504,306
OPERATING INCOME (LOSS)232,669
 24,113
 (67,386)
OTHER INCOME (EXPENSE):     
Interest expense(6,889) (7,347) (20,387)
Gain on extinguishment of debt
 
 6,975
Other expense(663) (1,025) (321)
Total other income (expense)(7,552) (8,372) (13,733)
INCOME (LOSS) BEFORE INCOME TAXES225,117
 15,741
 (81,119)
INCOME TAX (EXPENSE)/BENEFIT(51,255) (3,128) 27,972
NET INCOME (LOSS)$173,862
 $12,613
 $(53,147)
NET INCOME (LOSS) PER COMMON SHARE:     
Basic$2.08
 $0.17
 $(1.19)
Diluted$2.00
 $0.16
 $(1.19)
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:     
Basic83,460
 76,371
 44,787
Diluted87,046
 79,583
 44,787



See notes to consolidated financial statements. 5253



PROPETRO HOLDING CORP. AND SUBSIDIARY
CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY

FOR THE YEARS ENDED
DECEMBER 31, 20182021, 20172020 AND2016 (In 2019
(In thousands)
Common Stock
SharesAmountAdditional
Paid‑In
Capital
Retained Earnings (Accumulated
Deficit)
Total
BALANCE - January 1, 2019100,190 100 817,690 (20,435)797,355 
Stock‑based compensation cost— — 7,776 — 7,776 
Issuance of equity award—net434 1,163 — 1,164 
Net income— — — 163,010 163,010 
BALANCE - December 31, 2019100,624 $101 $826,629 $142,575 $969,305 
Stock‑based compensation cost— — 9,100 — 9,100 
Issuance of equity awards—net289 — — — — 
Tax withholdings paid for net settlement of equity— — (614)— (614)
Net loss— — — (107,020)(107,020)
BALANCE - December 31, 2020100,913 $101 $835,115 $35,555 $870,771 
Stock‑based compensation cost— — 11,519 — 11,519 
Issuance of equity awards—net2,524 4,015 — 4,017 
Tax withholdings paid for net settlement of equity— — (5,820)— (5,820)
Net loss— — — (54,185)(54,185)
BALANCE - December 31, 2021103,437 $103 $844,829 $(18,630)$826,302 

 Preferred Stock   Common Stock      
 Shares Amount Preferred
Additional
Paid‑In
Capital
 Shares Amount Additional
Paid‑In
Capital
 Accumulated
Deficit
 Total
BALANCE - January 1, 2016
 $
 $
 34,621
 $35
 $223,299
 $(153,763) $69,571
Stock‑based compensation cost
 
 
 
 
 1,649
 
 1,649
Additional equity capitalization, net of costs
 
 
 18,007
 18
 40,407
 
 40,425
Preferred equity capitalization, net of costs17,000
 17
 162,494
 
 
 
 
 162,511
Net loss
 
 
 
 
 
 (53,147) (53,147)
BALANCE - December 31, 201617,000
 17
 162,494
 52,628
 53
 265,355
 (206,910) 221,009
Stock‑based compensation cost
 
 
 
 
 9,489
 
 9,489
Initial Public Offering net of costs
 
 
 13,250
 13
 170,128
 
 170,141
Conversion of preferred stock to common stock at Initial Public Offering(17,000) (17) (162,494) 17,000
 17
 162,494
 
 
Issuance of equity award—net
 
 
 162
 
 
 
 
Net income
 
 
 
 
 
 12,613
 12,613
BALANCE - December 31, 2017
 
 
 83,040
 83
 607,466
 (194,297) 413,252
Stock‑based compensation cost
 
 
 
 
 5,482
 
 5,482
Issuance of equity award—net
 
 
 550
 1
 246
 
 247
Issuance of common stock
 
 
 16,600
 16
 204,496
 
 204,512
Net income
 
 
 
 
 
 173,862
 173,862
BALANCE - December 31, 2018
 $
 $
 100,190
 $100
 $817,690
 $(20,435) $797,355


See notes to consolidated financial statements. 5354



PROPETRO HOLDING CORP. AND SUBSIDIARY

CONSOLIDATED STATEMENTS OF CASH FLOWS

FOR THE YEARS ENDED
DECEMBER 31, 20182021, 20172020 AND2016 (In thousands)
2019
 2018 2017 2016
CASH FLOWS FROM OPERATING ACTIVITIES:     
Net income (loss)$173,862
 $12,613
 $(53,147)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:     
Depreciation and amortization88,138
 55,628
 43,542
Gain on extinguishment of debt
 
 (6,975)
Property and equipment impairment expense
 
 6,305
Goodwill impairment expense
 
 1,177
Deferred income tax expense (benefit)49,704
 3,430
 (27,972)
Amortization of deferred revenue rebate615
 1,846
 1,846
Amortization of deferred debt issuance costs403
 3,403
 2,091
Stock‑based compensation5,482
 9,489
 1,649
Loss on disposal of assets59,220
 39,086
 22,529
Gain loss on interest rate swap
 (251) (205)
Changes in operating assets and liabilities:    

Accounts receivable(3,300) (84,477) (24,888)
Other current assets207
 3,304
 (563)
Inventories(168) (1,472) 3,859
Prepaid expenses(1,418) (468) (62)
Accounts payable9,720
 64,228
 37,049
Accrued liabilities9,853
 2,930
 4,392
Accrued interest761
 (32) 32
Net cash provided by operating activities393,079
 109,257
 10,659
CASH FLOWS FROM INVESTING ACTIVITIES:     
Capital expenditures(284,197) (285,891) (42,832)
Proceeds from sale of assets3,593
 4,422
 1,144
Net cash used in investing activities(280,604) (281,469) (41,688)
CASH FLOWS FROM FINANCING ACTIVITIES:     
Proceeds from borrowings77,378
 60,045
 
Repayments of borrowings(80,946) (166,546) (41,295)
Proceeds from insurance financing5,824
 4,125
 4,126
Repayments of insurance financing(4,495) (3,807) (4,527)
Extinguishment of debt
 
 (30,000)
Payment of debt extinguishment costs
 
 (525)
Payment of debt issuance costs(1,732) (1,653) (140)
Proceeds from exercise of equity awards247
 
 
Proceeds from additional common equity capitalization
 
 40,425
Proceeds from preferred equity capitalization
 
 170,000
Payment of preferred equity capitalization costs
 
 (7,489)
Proceeds from IPO
 185,500
 
Payment of deferred IPO costs
 (15,099) (260)
Net cash (used in) provided by financing activities(3,724) 62,565
 130,315
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS108,751
 (109,647) 99,286
CASH AND CASH EQUIVALENTS — Beginning of year23,949
 133,596
 34,310
CASH AND CASH EQUIVALENTS — End of year$132,700
 $23,949
 $133,596
(In thousands)

202120202019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) income$(54,185)$(107,020)$163,010 
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization133,377 153,290 145,304 
Impairment expense— 38,002 3,405 
Deferred income tax (benefit) expense(14,288)(27,701)48,758 
Amortization of deferred debt issuance costs542 543 542 
Stock‑based compensation11,519 9,100 7,776 
Provision for credit losses282 448 949 
Loss on disposal of assets64,646 58,136 106,812 
Changes in operating assets and liabilities:
Accounts receivable(43,742)127,491 (10,177)
Other current assets310 1,978 1,351 
Inventories(1,220)(293)3,917 
Prepaid expenses4,463 (232)(4,386)
Accounts payable51,764 (95,697)(25,242)
Accrued liabilities1,246 (18,527)13,088 
Accrued interest— (394)183 
Net cash provided by operating activities154,714 139,124 455,290 
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures(143,523)(100,603)(502,894)
Proceeds from sale of assets39,231 6,386 7,595 
Net cash used in investing activities(104,292)(94,217)(495,299)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings— — 110,000 
Repayments of borrowings— (130,000)(50,000)
Payment of finance lease obligation— (30)(272)
Proceeds from insurance financing— 6,821 — 
Repayments of insurance financing(5,473)(1,348)(4,547)
Proceeds from exercise of equity awards4,017 — 1,164 
Tax withholdings paid for net settlement of equity awards(5,820)(614)— 
Net cash used in financing activities(7,276)(125,171)56,345 
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS43,146 (80,264)16,336 
CASH AND CASH EQUIVALENTS — Beginning of year68,772 149,036 132,700 
CASH AND CASH EQUIVALENTS — End of year$111,918 $68,772 $149,036 

See notes to consolidated financial statements. 5455


PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016



1. ORGANIZATION AND HISTORY
ProPetro Holding Corp. (“Holding”("Holding"), a Texas corporation was formed on April 14, 2007, to serve as a holding company for its wholly owned subsidiary ProPetro Services, Inc. (“Services”("Services"), a Texas corporation. Services providesoffers hydraulic fracturing, (inclusive of acidizing), cementing coiland coiled tubing drilling and flowback services to oil and gas producers, located primarily in Texas, Oklahoma, New Mexico Utah, Colorado, and Wyoming.Utah. Holding was converted and incorporated to a Delaware Corporation on March 8, 2017.
Holding and Services are collectively referred          Unless otherwise indicated, references in these notes to as the “Company” in the accompanying consolidated financial statements.
On December 22, 2016, the Company restated and amended the Company’s Shareholders Agreement and certificate of formation in the state of Texas, approving a reverse stock split, such that each holder of common stock of the Company shall receive one share of common stock for every 170.4667 shares of previous common stock held. In conjunction, the Company amended the amount of authorized shares to 230,000,000, of which 200,000,000 are common and 30,000,000 are preferred.
On March 22, 2017, we consummated our initial public offering (“IPO”) in which 25,000,000 shares of our common stock, par value $0.001 per share, were sold at a public offering price of $14.00 per share, with 13,250,000 shares issued and sold by the Company and 11,750,000 shares sold by existing stockholders. We received net proceeds of approximately $170.1 million after deducting $10.9 million of underwriting discounts and commissions, and $4.5 million of other offering expenses. At closing, we used the proceeds (i) to repay $71.8 million in outstanding borrowings under the term loan, (ii) $86.8 million to fund the purchase of additional hydraulic fracturing units and other equipment, and (iii) the remaining for general corporate purposes.
In connection with the IPO, the Company executed a stock split, such that each holder of common stock of the Company received 1.45 shares of common stock for every one share of previous common stock, and all 16,999,990 shares of our outstanding Series A preferred stock converted to common stock on a 1:1 basis.
Accordingly, any information related to or dependent upon the share or option counts in the 2018, 2017 and 2016 consolidated financial statements to "ProPetro Holding Corp.," "the Company," "we," "our," "us" or like terms refer to ProPetro Holding Corp. and Note 13 Net Income (loss) Per Share, Note 14 Stock‑Based Compensation, Note 18 Equity Capitalization and Note 19 Quarterly Financial Data (Unaudited) have been updated to reflect the effect of the reverse stock split in December 2016 and the stock split in March 2017, as applicable.Services.
On December 31, 2018, we consummated the purchase of pressure pumping and related assets of Pioneer Natural Resources USA, Inc. ("Pioneer") and Pioneer Pumping Services.Services, LLC (the "Pioneer Pressure Pumping Acquisition"). The pressure pumping assets acquired were used to provide integrated well completion services in the Permian Basin to Pioneer’s completion and production operations. The acquisition cost of the assets was comprised of $110.0 million of cash and 16.6 million shares of our common stock. The incremental direct costpressure pumping assets acquired included hydraulic fracturing pumps of $3.4 million incurred to consummate510,000 hydraulic horsepower ("HHP"), 4 coiled tubing units and the transaction was capitalized as part of the acquisition cost.associated equipment maintenance facility. In connection with the acquisition, we became a long-term service provider to Pioneer under a pressure pumping services agreement (the "Pioneer Services Agreement"), providing pressure pumping and related services for a term of up to 10 years. The pressure pumping assets acquired include eight hydraulic fracturing fleets with 510,000 HHP, four coiled tubing units andyears; provided, that Pioneer has the associated equipment maintenance facility. We evaluated and determined thatright to terminate the acquisition did not meet the definitionPioneer Services Agreement, in whole or in part, effective as of a Business under GAAP because substantially allDecember 31 of each of the assets acquiredcalendar years of 2022, 2024 and 2026. Pioneer can increase the number of committed fleets prior to December 31, 2022. Pursuant to the Pioneer Services Agreement, the Company is entitled to receive compensation if Pioneer were to idle committed fleets ("idle fees"); however, we are concentrated in a group of similar assets. Accordingly,first required to use all economically reasonable effort to deploy the idled fleets to another customer. At the present, we have accounted for the acquisition as an asset purchase.8 fleets committed to Pioneer.





55


PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016
2. SIGNIFICANT ACCOUNTING POLICIES


A summary of the significant accounting policies consistently applied in the preparation of the accompanying consolidated financial statements are as follows:
Principles of Consolidation — The accompanying consolidated financial statements include the accounts of Holding and its wholly owned subsidiary, Services. All intercompany accounts and transactions have been eliminated in consolidation.
Basis of Presentation — The accompanying consolidated financial statements and related notes have been prepared pursuant to the rules and regulations of the United States Securities and Exchange Commission (“SEC”("SEC") and in conformity with accounting principles generally accepted in the United States of America (“GAAP”("GAAP").
Use of Estimates — Management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and revenues and expenses during the reporting period. Such estimates include, but are not limited to, allowance for doubtful accounts,credit losses, useful lives for depreciation of property and equipment, estimates of fair value of property and equipment, estimates related to fair value of reporting units for purposes of assessing goodwill (if any), estimates related to deferred tax assets and liabilities, including any related valuation allowances, and estimates of fair value of stock‑based compensation. Actual results could differ from those estimates.
Revenue Recognition— The Company’s services are sold based upon contracts with customers. The Company recognizes revenue when it satisfies a performance obligation by transferring control over a product or service to a customer. The following is a description of the principal activities, separated byaggregated into our 1 reportable segmentsegment—"Pressure Pumping" and all other,"all other" category, from which the Company generates its revenue.
Pressure Pumping— Pressure pumping consists of downhole pumping services, which includes hydraulic fracturing (inclusive of acidizing services) and cementing.
Hydraulic fracturing is a well-stimulation technique intended to optimize hydrocarbon flow paths during the completion phase of shale wellbores. The process involves the injection of water, sand and chemicals under high pressure into shale formations. HydraulicOur hydraulic fracturing contracts with our customercustomers have one
56

PROPETRO HOLDING CORP.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

2. SIGNIFICANT ACCOUNTING POLICIES (Continued)
performance obligation, which is the contracted total stages, satisfied over time. We recognize revenue over time using a progress output, method, unit-of-work performed method, which is based on the agreed fixed transaction price and actual stages completed. We believe that recognizing revenue based on actual stages completed faithfully depicts how our hydraulic fracturing services are transferred to our customers over time. In addition, certain of our hydraulic fracturing equipment is entitled to daily idle fee charges if a customer were to idle committed hydraulic fracturing equipment. The Company recognizes revenue related to idle fee charges on a daily basis as the performance obligations are met.
Acidizing, which is part of our hydraulic fracturing operating segment, involves a well-stimulation technique where acid isor similar chemicals are injected under pressure into formations to form or expand fissures. Acidizing provides downhole solutions, andOur acidizing contracts with customers have one performance obligation, which is satisfied at a point-in-time, upon completion of the contracted service or sale of acid or chemical when control is transferred to the customer. Jobs for these services are typically short term in nature, with most jobs completed in less than a day. We recognize acidizing revenue at a point-in-time, upon completion of the performance obligation.
Our cementing services use pressure pumping equipment to deliver a slurry of liquid cement that is pumped down a well between the casing and the borehole. Cementing involves well bonding solutions, andOur cementing contracts with customers have one performance obligation, which is satisfied at a point-in-time, upon completion of the contracted service when control is transferred to the customer. Jobs for these services are typically short term in nature, with most jobs completed in less than a day. We recognize cementing revenue at a point-in-time, upon completion of the performance obligation.
The transaction price for each performance obligation for all our pressure pumping services areis fixed per our contractcontracts with customer.our customers.
All Other— All other services consistconsists of our surface drilling, drilling, coilcoiled tubing and flowback,operations, which are downhole well stimulation and completion/remedial services. The performance obligation for each of thethese services


56


PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016
2. SIGNIFICANT ACCOUNTING POLICIES (Continued)

has a fixed transaction price which is satisfied at a point-in-time upon completion of the service when control is transferred to the customer. Accordingly, we recognize revenue at a point-in-time, upon completion of the service and transfer of control to the customer.
Accounts Receivable — Accounts receivables are stated at the amount billed and billable to customers. Payment is typically due in full upon completion of the job for all of our services to customers. At December 31, 20182021 and 20172020 accrued revenue (unbilled receivable) included as part of our accounts receivable was $18.0 $19.4 million and $24.8$8.6 million, respectively. At December 31, 2018,2021, the transaction price allocated to the remaining performance obligation for our partially completed hydraulic fracturing operations was $43.9 $16.8 million, which is expected to be completed and recognized inwithin one month following the current period balance sheet date, in our pressure pumping reportable segment. At December 31, 20172020 the transaction price allocated to the remaining performance obligation for our then partially completed hydraulic fracturing operations was $26.4$14.7 million, which was recorded as part of our pressure pumping segment revenue for the year ended December 31, 2018.2021.
At          As of December 31, 2018, 2017 and 2016,2021, the Company had $0.2 million allowance for doubtfulcredit losses. Our allowance for credit losses is based on the evaluation of both our historic collection experience and economic outlook for the oil and gas industry. We evaluated the historic loss experience on our accounts was $0.1 million, $0.4 millionreceivable and $0.6 million, respectively. Duringalso considered separately customers with receivable balances that may be negatively impacted by current or future economic developments and market conditions. While the Company has not experienced significant credit losses in the past and has not yet seen material changes to the payment patterns of its customers, the Company cannot predict with any certainty the degree to which the impacts of the COVID-19 pandemic, including the potential impact of periodically adjusted borrowing base limits, level of hedged production, or unforeseen well shut-downs may affect the ability of its customers to timely pay receivables when due. Accordingly, in future periods, the Company may revise its estimates of expected credit losses.
57

PROPETRO HOLDING CORP.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

2. SIGNIFICANT ACCOUNTING POLICIES (Continued)
          The table below shows a summary of allowance for credit losses during the year additional allowance for doubtful accounts was $0.1 million and the allowance no longer required was 0.4 million.ended December 31, 2021:
($ in thousands)
202120202019
Balance - January 1, 2021$1,497 $1,049 $100 
Provision for credit losses during the period—net282 448 949 
Write-off during the period(1,562)— — 
Balance - December 31, 2021$217 $1,497 $1,049 
Inventories— Inventories, which consists only of raw materials, are stated at lower of average cost and net realizable value.
Property and Equipment — The Company’s property and equipment are recorded at cost, less accumulated depreciation.
Depreciation — Depreciation of property and equipment is provided on the straight‑line method over the following estimated useful lives:
LandIndefinite
Buildings and property improvements5 - 30 years
Vehicles1 ‑ 5 years
Equipment1 ‑ 20 years
Leasehold improvements5 ‑ 20 years
Upon sale or retirement of property and equipment, including certain major components of our pressure pumping equipment that are replaced, the cost and related accumulated depreciation are removed from the balance sheet and the net amount, less proceeds from disposal, is recognized as a gain or loss in the statement of operations. A significant portion of our loss on disposal of assets relates to replacement of major components like fluid and power ends. The Company recorded a loss on disposal of assets of $59.2$64.6 million $39.1, $58.1 million and $22.5$106.8 million for the years ended December 31, 2018, 20172021, 2020 and 2016,2019, respectively.
Impairment of Long‑Lived Assets — In accordance with Financial Accounting Standards Board (FASB)("FASB") Accounting Standards Codification (ASC)("ASC") 360, Accounting for the Impairment or Disposal of Long‑Lived Assets, the Company reviews its long‑lived assets to be held and used whenever events or circumstances indicate that the carrying value of those assets may not be recoverable.
An impairment loss is indicated if the sum of the expected future undiscounted cash flows attributable to the asset group is less than the carrying amount of such asset group. In this circumstance, the Company recognizes an impairment loss for the amount by which the carrying amount of the asset group exceeds the fair value of the asset group. No impairment expense was recorded induring the yearsyear ended December 31, 2018 and 2017. The impairment recorded in 2016 was $6.3 million for property2021. Property and equipment impairment loss of $27.5 million and $1.1 million was recorded during the year ended December 31, 2020 relating to our pressure pumping and drilling assets, respectively. Property and equipment impairment loss of $1.2 million and $2.2 million was recorded during the year ended December 31, 2019 relating to our drilling and flowback asset group.groups, respectively. Our drilling and flowback asset groups are included in the “all other” category in our reportable segment disclosure.


57


PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016
2. SIGNIFICANT ACCOUNTING POLICIES (Continued)

The Company accounts for long‑lived assets to be disposed of at the lower of their carrying amount or fair value, less cost to sell once management has committed to a plan to dispose of the assets.
Goodwill — Goodwill is the excess of the consideration transferred over the fair value of the tangible and identifiable intangible assets and liabilities recognized. Goodwill is not amortized. We perform an annual impairment test of goodwill as of December 31, or more frequently if circumstances indicate that impairment may exist. The determination of impairment is made by comparing the carrying amount of a reporting unit with its fair value, which is generally calculated using a combination of market and income approaches. If the fair value of the reporting unit exceeds the carrying value, no further testing is performed. If the fair value of the reporting unit is less
58

PROPETRO HOLDING CORP.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

2. SIGNIFICANT ACCOUNTING POLICIES (Continued)
than the carrying value, we consider goodwill to be impaired, and the amount of impairment loss is estimated and recorded in the statement of operations.
In 2014, we acquired Blackrock Drilling, Inc. (“Blackrock”) for $1.8 million. The assets acquired from Blackrock were recorded as $0.6 million of equipment with the excess of the purchase price over the fair value of the assets recorded as goodwill of $1.2 million. The acquisition complemented our existing drilling operations. The transaction has been accounted for using the acquisition method of accounting and, accordingly, assets and liabilities assumed were recorded at their fair values as of the acquisition date. Based on our goodwill impairment test as of December 31, 2016, the Company concluded that there was an impairment of goodwill of $1.2 million related to the Blackrock acquisition. Accordingly, a $1.2 million impairment expense was recorded during the year ended December 31, 2016, to fully write-down the goodwill related to Blackrock. Prior to the impairment write‑down, the goodwill related to the Blackrock acquisition of $1.2 million was recorded in our all other reportable segment.
In 2011, we acquired Technology Stimulation Services, LLC (“TSS”("TSS") for $24.4 million. The assets acquired from TSS were recorded as $15.0 million of equipment with the excess of the purchase price over fair value of the assets recorded as goodwill of $9.4 million. The acquisition complemented our existing pressure pumping business. The transaction has beenwas accounted for using the acquisition method of accounting and, accordingly, assets and liabilities assumed were recorded at their fair values as of the acquisition date. Based onThere were no additions to goodwill during the year ended December 31, 2021. In the first quarter of 2020, we performed an interim impairment test and concluded that goodwill was fully impaired. As a result of our interim impairment test during the first quarter of 2020, we recorded goodwill impairment tests as of December 31, 2018, 2017 and 2016, we concluded that the goodwill related to TSS acquisition was not impaired. The goodwill related to the TSS acquisitionexpense of $9.4 million is recorded induring the year ended December 31, 2020, which fully wrote off our pressure pumping reportable segment.goodwill carrying value. There were no good will impairments during the year ended December 31, 2019.
Intangible Assets — Intangible assets with finite useful lives are amortized on a basis that reflects the pattern in which the economic benefits of the intangible assets are realized, which is generally on a straight‑line basis over the asset’s estimated useful life.
Income Taxes — Income taxes are accounted for under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the consolidated financial statements. Under this method, deferred tax assets and liabilities are determined on the basis of differences between the consolidated financial statements and tax bases of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date.
We recognize deferred tax assets to the extent that we believe these assets are more likely than not to be realized. In making such a determination, we consider all positive and negative evidences,evidence, including future reversals of existing taxable temporary differences, projected future taxable income, and the results of recent operations. If we determine that we would not be able to fully realize our deferred tax assets in the future, in excess of their net recorded amount, we would make an adjustment to the deferred tax assetrecord a valuation allowance, which would reduce the provision for income taxes.allowance.
Advertising Expense — All advertising costs are expensed as incurred. For the years ended December 31, 2018, 20172021, 2020 and 2016,2019, advertising expense was $1.3$0.8 million $0.8, $0.4 million and $0.4$1.2 million, respectively.


58


PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016
2. SIGNIFICANT ACCOUNTING POLICIES (Continued)

Deferred Loan Costs — The Company capitalized certain costs in connection with obtaining its borrowings, including lender, legal, and accounting fees. These costs are being amortized over the term of the related loan using the straight‑line method. Deferred loan costs amortization is included in interest expense. Unamortized deferred loan costs associated with loans paid off or refinanced with different lenders are expensed in the period in which such an event occurs. Deferred loan costs are classified as a reduction of long‑term debt or in certain instanceinstances as an asset in the consolidated balance sheet. Amortization of deferred loan costs is recorded as interest expense in the statement of operations, and during the years ended December 31, 2018, 20172021, 2020 and 2016,2019, the amount of expense recorded was $0.4$0.5 million, $3.4 $0.5 million and $2.1$0.5 million, respectively.
Stock-Based Compensation — The Company recognizes the cost of stock‑based awards on a straight‑line basis over the requisite service period of the award, which is usually the vesting period under the fair value method. Total compensation cost is measured on the grant date using fair value estimates.
Insurance Financing — The Company annually renews its commercial insurance policies, and records a prepaid insurance asset and amortizes it monthly over the coverage period. The Company may choose to either directly pay the insurance premium or finance a portion of the premiumspremium. If the Company finances a portion of the premium, a prepaid insurance asset is recorded and will make repaymentsamortized monthly over ten months in equal installments.the relevant period.
Concentration of Credit Risk — The Company’s assets that are potentially subject to concentrations of credit risk are cash and cash equivalents and trade accounts receivable. Cash balances are maintained in financial institutions, which at times exceed federally insured limits. The Company monitors the financial condition of the financial institutions in which accounts are maintained and has not experienced any losses in such accounts. The receivables of the Company are spread over a number of customers, a majority of which arewith credible operators and suppliers toin the oil and natural gas industries. The Company performs ongoing credit evaluations as to the financial condition of its customers with respect to trade receivables.
59

PROPETRO HOLDING CORP.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

2. SIGNIFICANT ACCOUNTING POLICIES (Continued)
Recently Issued Accounting Standards Adopted in 20182021
In May 2014,December 2019, the Financial Accounting Standards Board ("FASB") issuedFASB Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers (Topic 606).issued ASU No. 2014-09 requires entities2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. ASU 2019-12 removes certain exceptions to recognize revenue to depict transfer of promised goods or services to customersthe general principles in an amount that reflects the consideration to which the entity expects to be entitledTopic 740 in exchange for those goods or services.Generally Accepted Accounting Principles. ASU No. 2014-09 requires entities to disclose both qualitative and quantitative information that enables users of the consolidated financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers, including disclosure of significant judgments affecting the recognition of revenue. ASU No. 2014-09 was2019-12 is effective for annual periodspublic entities for fiscal years beginning after December 15, 2017, using either the full retrospective or modified retrospective method. We adopted ASU No. 2014-09 effective2020, with early adoption permitted. Effective January 1, 2018, using the modified retrospective method. The adoption of2021, we adopted this guidance had no impact on our prior period results of operations. This is because prior toand the effective date ofadoption did not materially affect the new revenue guidance, substantially all of our performance obligations per our contracts with customers, except for hydraulic fracturing, were completed at a point-in-time, and revenue recognized when control was transferred to the customers, which is consistent with ASU No. 2014-09. Our hydraulic fracturing segment performance obligation is satisfied over time. Prior to the effective date of the new revenue standards, our hydraulic fracturing segment revenue was recognized based on actual stages completed, i.e. using the output method, which faithfully depicts how our services are transferred over time to our customers and is consistent with the requirements of the new guidance, ASU No. 2014-09. Accordingly, no adjustments to ourCompany’s condensed consolidated financial statements were required, other than the additional disclosures included as part of Note 2 in our consolidated financial statements.
Recently Issued Accounting Standards Not Yet Adopted in 20182021
In February 2016,March 2020, the FASB issued ASU No. 2016-02, Leases2020-04, Reference Rate Reform, which provides temporary optional guidance to companies impacted by the transition away from the London Interbank Offered Rate ("LIBOR"). The guidance provides certain expedients and exceptions to applying GAAP in order to lessen the potential accounting burden when contracts, hedging relationships, and other transactions that reference LIBOR as a benchmark rate are modified. This guidance is effective upon issuance and expires on December 31, 2022. The Company is currently assessing the impact of the LIBOR transition and this ASU introduces a lessee model that brings most leases on the balance sheet. This new standard increases transparency and comparability by recognizing a lessee’s rights and obligations resulting from leases by recording them on the balance sheet as Right of Use ("ROU") Assets and Lease Liabilities. Leases will be classified as either finance or operating, which will impact the pattern of


59


PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016
2. SIGNIFICANT ACCOUNTING POLICIES (Continued)

expense recognition on the income statement. This ASU also requires additional qualitative and quantitative disclosures to better enable users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. This ASU is effective for annual reporting periods beginning after December 15, 2018. Early adoption is permitted. We adopted this new lease standard effective January 1, 2019 and intend to elect the modified retrospective transition method. As such, the comparative financial information will not be restated and will continue to be reported under the lease standard in effect during those periods. We also intend to elect other practical expedients provided by the new standard, including the package of practical expedients, the short-term lease recognition practical expedient in which leases with a term of 12 months or less will not be recognized on the balance sheet, and the practical expedient to not separate lease and non-lease components for the majority of our leases. We believe that the adoption of this standard will result in an amount no greater than $10.0 million of additional assets and liabilities on our consolidated balance sheet representing the recognition of operating lease right-of-use assets and operating lease liabilities.
In January 2017, the FASB issued ASU No. 2017-04, Simplifying the Test for Goodwill Impairment, which removes the requirement to compare the implied fair value of goodwill with its carrying amount as part of step two of the goodwill impairment test. As a result, under this ASU, an entity would recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value. Although, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. This ASU is effective for impairment tests in fiscal years beginning after December 15, 2019, on a prospective basis. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. We believe that the adoption of this guidance will not materially affect ourCompany’s consolidated financial statements.



60


PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016

3. SUPPLEMENTAL CASH FLOWS INFORMATION
($ in thousands)
Year Ended December 31,
202120202019
Supplemental cash flows disclosures
Interest paid$72 $2,207 $6,433 
Income taxes paid$196 $1,786 $1,018 
Supplemental disclosure of non‑cash investing and financing activities
Capital expenditures included in accounts payable and accrued liabilities$36,818 $14,803 $31,226 
Non-cash purchases of property and equipment$— $— $— 
 December 31,
($ in thousands)2018 2017 2016
Supplemental cash flows disclosures     
Interest paid$5,068
 $3,966
 $18,249
Income taxes paid$
 $
 $3
Supplemental disclosure of non‑cash investing and financing activities     
Capital expenditures included in accounts payable and accrued liabilities$137,647
 $33,850
 $3,176
Conversion of preferred stock to common stock at Initial Public Offering$
 $162,511
 $
Non-cash purchases of property and equipment$204,512
 $
 $
4. FAIR VALUE MEASUREMENTS
Fair value ("FV") is defined as the price that would be received to sell an asset or paid to transfer a liability (i.e., the “exit price”"exit price") in an orderly transaction between market participants at the measurement date.
In determining fair value, the Company uses various valuation approaches and establishes a hierarchy for inputs used in measuring fair value that maximizes the use of relevant observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used, when available. Observable inputs are inputs that market participants would use in pricing the asset or liability developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions about the assumptions other market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. The hierarchy is broken down into three levels based on the observability of inputs as follows:
Level 1 — Valuations based on quoted prices in active markets for identical assets or liabilities that the Company has the ability to access. Valuation adjustments and block discounts are not applied to Level 1 instruments. Since valuations are based on quoted prices that are readily and regularly available in an active market, valuation of these instruments does not entail a significant degree of judgment.
Level 2 — Valuations based on one or more quoted prices in markets that are not active or for which all significant inputs are observable, either directly or indirectly.
60

PROPETRO HOLDING CORP.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

4. FAIR VALUE MEASUREMENTS (Continued)
Level 3 — Valuations based on inputs that are unobservable and significant to the overall fair value measurement.
A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Our financial instruments include cash and cash equivalents, accounts receivable, and accounts payable, accrued and other current liabilities, and long-term debt.debt (if any). The estimated fair value of our financial instruments — cash and cash equivalent, accounts receivable and accounts payable and accrued liabilities at December 31, 20182021 and 2017 approximates2020 approximated or equaled their


61


PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016
4. FAIR VALUE MEASUREMENTS (Continued)

carrying value as reflected in our consolidated balance sheets because of their short‑term nature. In 2018, we did not have a derivate financial instrument. Prior to 2018, we used a derivative financial instrument, an interest rate swap, to manage interest rate risk. Our policies do not permit the use of derivative financial instruments for speculative purposes. We did not designate the interest rate swap as a hedge for accounting purposes. We record all derivatives as of the end of our reporting period in our consolidated balance sheet at fair value, which is based on quoted market prices, which represents a level 1 in the fair value measurement hierarchy. Based on quoted market prices as of December 31, 2017 and 2016, for contracts with similar terms and maturity date, as provided by the counterparty, we recorded a gain of $0.3 million and $0.2 million, respectively, in our consolidated statement of operations. The fair value of the interest rate swap liability at December 31, 2017 and 2016 was $0 and $0.3 million, respectively.sheets.
Assets Measured at Fair Value on a Nonrecurring Basis
No           There was no impairment of assets were measured at fair value on a nonrecurring basis at December 31, 2018 and 2017, respectively.
No impairment was recorded for our property and equipment during the year ended December 31, 20182021. During the year ended December 31, 2020, we recorded property and 2017. In 2016,equipment impairment loss of approximately $28.6 million in connection with the depressed cash flows and continued decline in utilization of our pressure pumping and drilling assets were indicative. During the year ended December 31, 2019, we recorded property and equipment impairment loss of potential impairment, resultingapproximately $3.4 million in the Company comparing the carrying value of theconnection with our drilling and flowback assets, with its estimated fair value. We determined that the carrying value of the drilling assets was greater than its estimated fair value and accordingly, an impairment expense was recorded. In 2016, the non‑cash asset impairment charges for drilling was $6.3 million, which had a net carrying value of $15.0 million prior to the impairment write‑down. See Note 7, “Impairment of Long‑Lived Assets.”in our “all other” segment.
We generally apply fair value techniques to our reporting units on a nonrecurring basis associated with valuing potential impairment loss related to goodwill.goodwill, if any. Our estimate of the reporting unit fair value is based on a combination of income and market approaches, Level 1 and 3, respectively, in the fair value hierarchy. The income approach involves the use of a discounted cash flow method, with the cash flow projections discounted at an appropriate discount rate. The market approach involves the use of comparable public companiescompanies’ market multiples in estimating the fair value. Significant assumptions include projected revenue growth, capital expenditures, utilization, gross margins, discount rates, terminal growth rates, and weight allocation between income and market approaches. If the reporting unit'sunit’s carrying amount exceeds its fair value, we consider goodwill impaired, and the impairment loss is calculated and recorded in the period. There were no additions to, or disposal of, goodwill during the yearyears ended December 31, 2018, 20172021, 2020 and 2016. Based on our annual2019. In the first quarter of 2020, the depressed crude oil prices and crude oil storage challenges faced in the U.S. oil and gas industry triggered the Company to perform an interim goodwill impairment test, and as a result, we compared the carrying value of the goodwill in our hydraulic fracturing reporting unit with the estimated fair value. Our interim impairment test also considered other relevant factors, including market capitalization and market participants’ view of the oil and gas industry in reaching our conclusion that the carrying value of our goodwill in our pressure pumping reportable segment of $9.4 million was fully impaired during the first quarter of 2020. Accordingly, we recorded a goodwill impairment expense of $9.4 million in March 2020, resulting in a full write off of our goodwill. There were no good will impairment of goodwill was recorded forduring the year ended December 31, 2018 and 2017. At December 31, 2016, we estimated the fair value of our surface air drilling reporting unit to be $3.8 million and its carrying value was $4.2 million. As a result of the potential impairment with the carrying value exceeding the estimated fair value, we then further determined the implied fair value of the surface drilling goodwill to be $0. Accordingly, we recorded an impairment expense of $1.2 million. The impairment expense was attributable to the challenging oil and gas market and slow recovery of crude oil prices, all of which adversely impacted on our expected future cash flows for the surface air drilling reporting unit.
5. INTANGIBLE ASSETS
Intangible assets are composed of internally developed software. Intangible assets are amortized on a straight‑line basis with a useful life of five years. Amortization expense included in net income (loss) for the years ended December 31, 2018, 2017 and 2016 was $0.3 million, $0.3 million and $0.3 million, respectively. At December 31, 2018 and 2017, respectively, the company’s intangible assets subject to amortization are as follows:2019.
61
($ in thousands)2018 2017
Internally developed software$1,440
 $1,440
Less accumulated amortization1,427
 1,139
Intangible assets — net$13
 $301


62


PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016

Estimated remaining amortization expense for each of the subsequent fiscal years is expected to be as follows:
($ in thousands) 
YearEstimated
Future
Amortization
Expense
2019$13
2020
Total$13
The average amortization period remaining is approximately 0.05 years.
6.5. PROPERTY AND EQUIPMENT
Property and equipment consisted of the following at December 31, 2018 and 2017, respectively:following:
($ in thousands)
December 31,
20212020
Land$10,551 $10,551 
Buildings30,045 29,312 
Equipment and vehicles1,248,464 1,242,698 
Leasehold improvements8,159 8,035 
Subtotal1,297,219 1,290,596 
Less accumulated depreciation(488,725)(410,119)
Property and equipment — net$808,494 $880,477 
($ in thousands)2018 2017
Land$7,669
 $
Building23,840
 
Equipment and vehicles1,105,380
 646,800
Leasehold improvements5,559
 4,987
Subtotal1,142,448
 651,787
Less accumulated depreciation229,602
 180,877
Property and equipment — net$912,846
 $470,910
7. IMPAIRMENT OF LONG‑LIVED ASSETS
Whenever events or circumstances indicate that the carrying value of long‑lived assets may not be recoverable, the Company reviews the carrying value of long‑lived assets, such as property and equipment and other assets to determine if they are recoverable. If any long‑lived assets are determined to be unrecoverable, an impairment expense is recorded in the period. Asset recoverability is estimated using undiscounted future net cash flows at the lowest identifiable level, excluding interest expense and one‑time other income and expense adjustments.          During the year, the Company determined the lowest level of identifiable cash flows to be at the asset group level, which consists of hydraulic fracturing (inclusive of acidizing), cementing, coil tubing, flowback and drilling.
During the year ended December 31, 2018 and 2017, no impairment expense was recorded for any of our asset groups. During the year ended December 31, 2016, the gradual shift from vertical to horizontal drilling rigs in the Permian Basin led to the deterioration in utilization of our drilling rigs, and we expected undiscounted future cash flows to be lower than the carrying value of the drilling assets. Given that the carrying value of the drilling assets may not be recoverable, the Company estimated the fair value of the asset group and compared it to its carrying value. Potential impairment exists if the estimated undiscounted future net cash flows for a given asset group is less than the carrying amount of the asset group. The impairment expense is determined by comparing the estimated fair value with the carrying value of the related asset, and any excess amount by which the carrying value exceeds the fair value is recorded as an impairment expense in the period. At December 31, 2016, the estimated fair value of the drilling asset group of $8.7 million was determined using the market approach, which represents a level 2 in the fair value measurement hierarchy. Our fair value estimates required us to use significant other observable inputs including assumptions related to replacement cost, among others. Accordingly, an impairment expense of $6.3


63


PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016
7. IMPAIRMENT OF LONG-LIVED ASSETS (Continued)

million was recorded in 2016 as the carrying value of the drilling asset group of $15.0 million was greater than its then estimated fair value. All other assets group carrying values were determined to be recoverable in 2016.
8. DEFERRED REVENUE REBATE
In November 2011, the Company acquired certain oilfield fracturing equipment from a customer and agreed to provide future fracturing services to the customer for a period of 78 months in exchange for a 12% $25.0 million note payable to the customer. The Company recorded the fracturing equipment at its estimated fair value of approximately $13.0 million and assigned the remaining value of approximately $12.0 million to a deferred revenue rebate account to be amortized over the customer’s 78‑month service period. In March 2013, the Company repaid the note payable to the customer. For each of the years ended December 31, 2018, 20172021 and 2016 the Company recorded $0.62020 and 2019, our depreciation expense was $133.4 million, $1.8$153.3 million and $1.8$145.3 million respectively, of amortization rebate as a reduction of revenue.respectively.
9.6. LONG‑TERM DEBT
2013 TermAsset-Based Loan and Revolving("ABL") Credit Facility
On September 30, 2013, we entered into a term loan in the amount of $220 million ("Term Loan") with a $40 million revolving credit line ("Revolving Credit Facility"). Borrowings under the Term Loan and Revolving Credit Facility accrued interest at LIBOR plus 6.25%, subject to a 1% LIBOR floor, and were secured by a first priority lien and security interest in all assets of the Company. The Term Loan and Revolving Credit Facility were scheduled to mature on September 30, 2019 and September 30, 2018, respectively, with quarterly and monthly payments of principal and interest, respectively.
Under the Term Loan and Revolving Credit Facility we were required to comply, subject to certain exceptions and materiality qualifiers, with certain customary affirmative and negative covenants, including, but not limited to, covenants pertaining to reporting, insurance, collateral maintenance, change of control, transactions with affiliates, distributions, and limitations on additional indebtedness. In addition, the Term Loan and Revolving Credit Facility included a maximum leverage ratio of 3.5x EBITDA (earnings before interest, taxes, depreciation, and amortization) to total debt, which became effective March 31, 2014.
In 2015, given the then near-term economic uncertainty and volatility of commodity prices, we determined that we were likely to be out of compliance with the leverage ratio covenant under the Term Loan and Revolving Credit Facility at the March 31, 2016 test date. Accordingly, the Company and its then equity sponsor, Energy Capital Partners ("ECP"), commenced negotiations with the lenders to amend the covenants and leverage ratio in the Term Loan and Revolving Credit Facility. The resulting amendment and waiver agreement was executed on June 8, 2016. Under the terms of the amendment, ECP infused $40.0 million of additional equity into the Company, $10.0 million of which was reserved for working capital, with up to $30.0 million available to repurchase debt. A minority shareholder also infused $0.4 million alongside ECP to prevent dilution. The amendment and waiver also suspended the leverage ratio test until June 30, 2017, and provided us with 30 days to deliver any past-due financial statements.
Gain on Extinguishment of Debt
In connection with the amendment to the Term Loan and Revolving Credit Facility, we initiated an auction process with the lenders to repurchase a portion of debt for a price of $0.80, a 20% discount to par value. The auction settled on June 16, 2016 as the Company repurchased a total amount of $37.5 million of debt for $30.0 million plus $0.5 million in debt extinguishment auction costs, leading to a gain on extinguishment of debt of $7.0 million.
On January 13, 2017, we repaid $75.0 million of the outstanding balance under the Term Loan and repaid the remaining balance of $13.5 million under the Revolving Credit Facility using a portion of the proceeds from our private placement offering. On March 22, 2017, we retired the $71.8 million remaining balance of the Term Loan, along with accrued interest, using a portion of the proceeds from our IPO. Each of the Term Loan and Revolving Credit Facility were terminated in accordance with their terms upon the repayment of outstanding borrowings.


64


PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016
9. LONG‑TERM DEBT (Continued)

Equipment Financing
On November 24, 2015, we entered into a 36 months financing arrangement for three hydraulic fracturing units in the amount of $25.0 million, and a portion of the proceeds were used to pay off the previous manufacturer notes, with the remainder being used for additional liquidity. As of December 31, 2018, we have fully repaid all outstanding balance and met all obligations under this financing arrangement.
On June 30, 2017, we entered into a financing arrangement for the purchase of light vehicles. As of December 31, 2018, we have fully repaid all outstanding balance and met all obligations under this financing arrangement.
ABL Credit Facility
On March 22, 2017, we entered into a new          Our revolving credit facility with a $150.0 million borrowing capacity ("ABL Credit Facility"). Borrowings under, as amended, has a total borrowing capacity of $300 million (subject to the ABL Credit Facility accrue interest based onBorrowing Base limit), with a three-tier pricing grid tied to availability, and we may elect for loans to be based on either LIBOR or base rate, plus the applicable margin, which ranges from 1.75% to 2.25% for LIBOR loans and 0.75% to 1.25% for base rate loans, with no LIBOR floor. Borrowings under the ABL Credit Facility are secured by a first priority lien and security interest in substantially all assetsmaturity date of the Company.December 19, 2023. The ABL Credit Facility has a term of 5 years and a borrowing base of 85% of monthly eligible accounts receivable less customary reserves.reserves (the "borrowing base"), as redetermined monthly. The borrowing base as of December 31, 2021 was approximately $61.1 million. The ABL Credit Facility includes a Springing Fixed Charge Coverage Ratio to apply when excess availability is less than the greater of (i) 10% of the lesser of the facility size or the borrowing base or (ii) $22.5 million. Under this facility we are required to comply, subject to certain exceptions and materiality qualifiers, with certain customary affirmative and negative covenants, including, but not limited to, covenants pertaining to our ability to incur liens, indebtedness, changes in the nature of our business, mergers and other fundamental changes, disposal of assets, investments and restricted payments, amendments to our organizational documents or accounting policies, prepayments of certain debt, dividends, transactions with affiliates, and certain other activities. In addition,Borrowings under the ABL Credit Facility includesare secured by a Springing Fixed Charge Coverage Ratio of 1.0x when excess availability is less than the greater of (i) 10%first priority lien and security interest in substantially all assets of the lesser of the facility size and the Borrowing Base and (ii) $12.0 million. The ABL has a commitment fee of 0.38%, which reduces to 0.25% if utilization is greater than 50% of the borrowing base.Company.
On February 22, 2018, we entered into a first amendment with our lenders to increase the capacity of the ABL Credit Facility. The amendment increased total capacity          Borrowings under the facility from $150.0 million to $200.0 million. The first amendment to the ABL Credit Facility modifiedaccrue interest based on a three-tier pricing grid tied to availability, and we may elect for loans to be based on either LIBOR or base rate, plus the Springing Fixed Charge Coverage Ratioapplicable margin, which ranges from 1.75% to apply when excess availability is less than the greater2.25% for LIBOR loans and 0.75% to 1.25% for base rate loans, with a LIBOR floor of (i) 10% of the lesser of the facility size and the Borrowing Base and (ii) $15 million.zero.
On December 19, 2018, we entered into a second amendment with our lenders to further increase the capacity of the ABL Credit Facility. The second amendment increased total capacity under the facility from $200.0 million to $300.0 million and extended the maturity date of the ABL Credit Facility from March 22, 2022 until December 19, 2023. The second amendment to the ABL Credit Facility modified the Springing Fixed Charge Coverage Ratio to apply when excess availability is less than the greater of (i) 10% of the lesser of the facility size and the Borrowing Base and (ii) $22.5 million.
The fair values of the ABL Credit Facility and equipment financing approximate their carrying values.


65


PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016
9. LONG‑TERM DEBT (Continued)

Total debt consisted of the following notes at December 31, 2018 and 2017, respectively:
($ in thousands)2018 2017
ABL Credit Facility$70,000
 $55,000
Equipment financing
 17,942
Total debt70,000
 72,942
Less current portion of long-term debt
 15,764
Total long-term debt$70,000
 $57,178
The loan origination costs relating to the ABL Credit Facility are classified as an asset in the balance sheet.
Annual Maturities — Scheduled annual maturities There were no borrowings under the ABL Credit Facility as of total debt are as follows at December 31, 2018:2021, and 2020.
($ in thousands) 
2019$
2020
2021
2022
2023 and thereafter70,000
Total$70,000
10.7. ACCRUED AND OTHER CURRENT LIABILITIES
Accrued and other current liabilities consisted of the following at December 31, 2018 and 2017, respectively:following:
($ in thousands)
December 31,
20212020
Accrued insurance— 6,553 
Accrued payroll and related expenses6,816 4,640 
Capital expenditure, taxes and others accruals13,951 13,483 
Total$20,767 $24,676 
62
($ in thousands)2018 2017
Accrued capital expenditure$109,832
 $
Accrued insurance3,905
 2,762
Accrued payroll and related expenses15,854
 10,110
Accrued taxes and others8,498
 3,735
Total$138,089
 $16,607


66


PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016

11.8. EMPLOYEE BENEFIT PLAN
The Company has a 401(k) plan, whereby all employees with six months of service may contribute up to $15,000 to the plan annually. The employees vest in the Company contributions to the 401(k) plan 25% per year, beginning in the employee’s second year of service, with full vesting occurring after five years of service. The employees are fully vested in their contributions when made. The Company matches employee contributions 20 cents on the dollar up to 10% of gross salary. During the years ended December 31, 2018, 2017 and 2016, the recorded expense under the plan was $0.3 million, $0.2 million and $0.2 million, respectively. Effectivelymodified effective January 1, 2019, we modified our 401(k) plan whereby all employees with sixty daysand the Company matches 100% of service may contributethe employee contributions up to $19,0006% of gross salary, up to the plan annually.annual limit. The employees vest in the Company contributions to the 401(k) plan 25% per year, beginning in the employee’s first year of service, with full vesting occurring after four years of service. The employees are fully vested in their contributions when made. TheEffective April 1, 2022, the Company matches 100%modified its 401(k) plan to allow for immediate vesting of the employee contributions up to 6% of gross salary.Company’s contributions. During the years ended December 31, 2021, 2020 and 2019, the recorded expense under the plan was $2.8 million, $2.1 million and $3.0 million, respectively.
12.9. REPORTABLE SEGMENT INFORMATION
The Company has five3 operating segments for which discreetdiscrete financial information is readily available: hydraulic fracturing (inclusive of acidizing), cementing coil tubing, flowback, and drilling.coiled tubing. These operating segments represent how the Chief Operating Decision Maker evaluates performance and allocates resources.
On August 31, 2018, we divested our surface air drilling operations,In December 2021, the Company disposed of 2 turbine generators included in our "all other" category, in order to continue to focus and position ourselves as a Permian Basin-focused pressure pumping business because we believereportable segment for total cash proceeds of approximately $36.0 million. The net book value of the pressure pumping market2 turbines prior to the disposal was approximately $39.5 million, resulting in the Permian Basin offers more supportive long-term growth fundamentals. The divestiture of our surface air drilling operations did not qualify for presentation and disclosure as discontinued operations, and accordingly, we have recorded the resulting loss on disposal of our surface airapproximately $3.5 million. In September 2020, the Company shut down its drilling operations and disposed of $0.3 million as partall of our loss on disposalits drilling rigs and ancillary assets for approximately $0.5 million. In March 2020, the Company shut down its flowback operating segment and subsequently disposed of assetthe assets for approximately $1.6 million. Our drilling and flowback operations were included in our consolidated statement“all other” category. The shutdown of operations. The divestiture of our surface airthe drilling and flowback operations resulted in a reduction in the number of our current operating segments to five.3. The change in the number of our operating segments did not impact our reportable segment information reported for the years ended December 31, 2018, 2017 and 2016.presented.
In accordance with Accounting Standards CodificationFASB ASC 280—Segment Reporting, the Company has one1 reportable segment (pressure pumping) comprised of the hydraulic fracturing and cementing operating segments. All otherThe coiled tubing operating segmentssegment and corporate administrative expensesexpense (inclusive of our total income tax expense (benefit), other (income) and expense and interest expense) are included in the ‘‘all other’’"all other" category in the tabletables below. Total corporate administrative expense for the years ended December 31, 2021, 2020 and 2019 was $38.5 million, $31.6 million and $113.0 million, respectively.
          Our hydraulic fracturing operating segment revenue approximated 93.3%, 94.2% and 95.6% of our pressure pumping revenue for the years ended December 31, 2021, 2020 and 2019, respectively.
          Inter-segment revenues are not material and are not shown separately in the table below.
The Company manages and assesses the performance of the reportable segment by its adjusted EBITDA (earnings(earnings before other income (expense), interest expense, income taxes, depreciation &and amortization, stock-based compensation expense, severance and related expense, impairment expense, (gain)/loss on disposal of assets and other unusual or nonrecurring expenses or income)(income)).
63

PROPETRO HOLDING CORP.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

9. REPORTABLE SEGMENT INFORMATION (Continued)
          A reconciliation from segment level financial information to the consolidated statement of operations is provided in the table below.below (in thousands):

Pressure
Pumping
All OtherTotal
Year ended and as of December 31, 2021
Service revenue$857,642 $16,872 $874,514 
Adjusted EBITDA$181,688 $(46,681)$135,007 
Depreciation and amortization$129,478 $3,899 $133,377 
Capital expenditures$162,044 $3,114 $165,158 
Total assets$1,023,037 $38,199 $1,061,236 
Pressure
Pumping
All OtherTotal
Year ended and as of December 31, 2020
Service revenue$773,474 $15,758 $789,232 
Adjusted EBITDA$174,030 $(32,567)$141,463 
Depreciation and amortization$148,659 $4,631 $153,290 
Impairment expense$36,907 $1,095 $38,002 
Capital expenditures$78,154 $3,091 $81,245 
Total assets$1,009,631 $41,108 $1,050,739 
Pressure
Pumping
All OtherTotal
Year ended and as of December 31, 2019
Service revenue$2,001,627 $50,687 $2,052,314 
Adjusted EBITDA$533,760 $(14,691)$519,069 
Depreciation and amortization$139,348 $5,956 $145,304 
Impairment expense$— $3,405 $3,405 
Capital expenditures$387,119 $13,552 $400,671 
Goodwill$9,425 $— $9,425 
Total assets$1,381,811 $54,300 $1,436,111 


64
67


PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016
12.9. REPORTABLE SEGMENT INFORMATION (Continued)

($ in thousands)     
 Pressure
Pumping
 All Other Total
Year ended and as of December 31, 2018     
Service revenue$1,658,403
 $46,159
 $1,704,562
Adjusted EBITDA$398,396
 $(9,873) $388,523
Depreciation and amortization$83,404
 $4,734
 $88,138
Capital expenditures$577,171
 $15,431
 $592,602
Goodwill$9,425
 $
 $9,425
Total assets$1,230,830
 $43,692
 $1,274,522
      
 Pressure
Pumping
 All Other Total
Year ended and as of December 31, 2017     
Service revenue$945,040
 $36,825
 $981,865
Adjusted EBITDA$145,122
 $(7,679) $137,443
Depreciation and amortization$51,155
 $4,473
 $55,628
Capital expenditures$300,406
 $4,893
 $305,299
Goodwill$9,425
 $
 $9,425
Total assets$688,279
 $30,753
 $719,032
      
 Pressure
Pumping
 All Other Total
Year ended and as of December 31, 2016     
Service revenue$409,014
 $27,906
 $436,920
Adjusted EBITDA$15,656
 $(7,840) $7,816
Depreciation and amortization$37,282
 $6,260
 $43,542
Property and equipment impairment expense$
 $6,305
 $6,305
Goodwill impairment expense$
 $1,177
 $1,177
Capital expenditures$45,473
 $535
 $46,008
Goodwill$9,425
 $
 $9,425
Total assets$501,906
 $39,516
 $541,422


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PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016
12. REPORTABLE SEGMENT INFORMATION (Continued)

Reconciliation of net income (loss) to adjusted EBITDA:EBITDA (in thousands):
Pressure
Pumping
All OtherTotal
Year ended December 31, 2021
Net loss$(12,723)$(41,462)$(54,185)
Depreciation and amortization129,478 3,899 133,377 
Interest expense— 614 614 
Income tax benefit— (14,252)(14,252)
Loss (gain) on disposal of assets64,903 (257)64,646 
Stock‑based compensation— 11,519 11,519 
Other income— (873)(873)
Other general and administrative expense (1)
— (6,471)(6,471)
Severance expense30 602 632 
Adjusted EBITDA$181,688 $(46,681)$135,007 
Pressure
Pumping
All OtherTotal
Year ended December 31, 2020
Net loss$(68,271)$(38,749)$(107,020)
Depreciation and amortization148,659 4,631 153,290 
Interest expense2,382 2,383 
Income tax benefit— (27,480)(27,480)
Loss on disposal of assets56,659 1,477 58,136 
Impairment expense36,907 1,095 38,002 
Stock‑based compensation— 9,100 9,100 
Other expense— 874 874 
Other general and administrative expense (1)
— 13,038 13,038 
Retention bonus and severance expense75 1,065 1,140 
Adjusted EBITDA$174,030 $(32,567)$141,463 
Pressure
Pumping
All OtherTotal
Year ended December 31, 2019
Net income (loss)$281,090 $(118,080)$163,010 
Depreciation and amortization139,348 5,956 145,304 
Interest expense51 7,090 7,141 
Income tax expense— 50,494 50,494 
Loss on disposal of assets106,178 633 106,811 
Impairment expense— 3,405 3,405 
Stock‑based compensation— 7,776 7,776 
Other expense— 717 717 
Other general and administrative expense (1)
— 25,208 25,208 
Deferred IPO bonus, retention bonus and severance expense7,093 2,110 9,203 
Adjusted EBITDA$533,760 $(14,691)$519,069 
($ in thousands)Pressure
Pumping
 All Other Total
Year ended December 31, 2018     
Net income (loss)$253,196
 $(79,334) $173,862
Depreciation and amortization83,404
 4,734
 88,138
Interest expense
 6,889
 6,889
Income tax expense
 51,255
 51,255
Loss (gain) on disposal of assets59,962
 (742) 59,220
Stock‑based compensation
 5,482
 5,482
Other expense
 663
 663
Other general and administrative expense (1)
2
 203
 205
Deferred IPO Bonus1,832
 977
 2,809
Adjusted EBITDA$398,396
 $(9,873) $388,523
      
Year ended December 31, 2017Pressure
Pumping
 All Other Total
Net income (loss)$50,417
 $(37,804) $12,613
Depreciation and amortization51,155
 4,473
 55,628
Interest expense
 7,347
 7,347
Income tax expense
 3,128
 3,128
Loss on disposal of assets38,059
 1,027
 39,086
Stock‑based compensation
 9,489
 9,489
Other expense
 1,025
 1,025
Other general and administrative expense (1)

 722
 722
Deferred IPO Bonus5,491
 2,914
 8,405
Adjusted EBITDA$145,122
 $(7,679) $137,443
      
 Pressure
Pumping
 All Other Total
Year ended December 31, 2016     
Net loss$(45,316) $(7,831) $(53,147)
Depreciation and amortization37,282
 6,260
 43,542
Interest expense
 20,387
 20,387
Income tax benefit
 (27,972) (27,972)
Loss on disposal of assets23,690
 (1,161) 22,529
Property and equipment impairment expense
 6,305
 6,305
Goodwill impairment expense
 1,177
 1,177
Gain on extinguishment of debt
 (6,975) (6,975)
Stock‑based compensation
 1,649
 1,649
Other expense
 321
 321
Adjusted EBITDA$15,656
 $(7,840) $7,816
(1) OtherDuring the years ended December 31, 2021, 2020 and 2019, other general and administrative expense (net of reimbursement from insurance carriers) primarily relates to legal settlement expense.

nonrecurring professional fees paid to external consultants in connection with our audit committee review, SEC investigation and shareholder litigation, net of insurance recoveries. During the years ended December 31, 2021, 2020 and 2019, we received reimbursement of approximately $9.8 million, $0.6 million and $0, respectively, from our insurance carriers in connection with the SEC investigation and shareholder litigation.

65
69


PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016
12.9. REPORTABLE SEGMENT INFORMATION (Continued)


Major Customers
For the years ended December 31, 2018, 2017 and 2016, the          The Company had revenue from the following significant customers that accounted for the following percentages of the Company’s total revenue:
Year Ended December 31,
202120202019
Customer A54.2 %42.5 %25.5 %
Customer B14.6 %20.3 %20.9 %
Customer C8.8 %9.3 %13.2 %
Customer D4.4 %8.6 %9.2 %
Customer E3.8 %5.8 %8.2 %
 2018 2017 2016
Customer A24.1% 15.0% 18.0%
Customer B16.5% 13.8% 12.5%
Customer C12.2% 12.7% 8.7%
Customer D8.9% 12.6% 7.0%
Customer E7.1% 11.8% %
For the year ended December 31, 2018,           The above significant customers’ revenue that relates to pressure pumping made up 97.4% of Customer A, 98.3% of Customer B, 100.0% of Customer C, 100.0% of Customer D and 100.0% of customer E. For the year ended December 31, 2017, pressure pumping made up 99.9% of Customer A, 99.2% of Customer B, 99.9% of Customer C, 99.8% of Customer D and 95.5% of customer E. For the year ended December 31, 2016, pressure pumping made up 96.0% of Customer A, 99.0% of Customer B, 100.0% of Customer C and 99.0% of Customer D.is below:
Year Ended December 31,
202120202019
Customer A99.6 %99.8 %99.7 %
Customer B100.0 %97.6 %95.4 %
Customer C99.7 %99.9 %99.9 %
Customer D87.6 %99.7 %100.0 %
Customer E100.0 %85.7 %100.0 %
13.
10. NET (LOSS) INCOME (LOSS) PER SHARE
Basic net (loss) income (loss) per common share is computed by dividing the net (loss) income (loss) relevant to the common stockholders by the weighted-average number of shares outstanding during the year. Diluted net (loss) income (loss) per common share uses the same net (loss) income (loss) divided by the sum of the weighted-average number of shares of common stock outstanding during the period, plus dilutive effects of options, performance stock units and restricted stocksstock units outstanding during the period calculated using the treasury method and the potential dilutive effects of preferred stocks (if any) calculated using the if-converted method. The table below shows the calculations for years ended December 31, 2018, 2017 and 2016.
(In thousands, except for per share data)
Year Ended December 31,
202120202019
Numerator (both basic and diluted)
Net (loss) income relevant to common stockholders$(54,185)$(107,020)$163,010 
Denominator
Denominator for basic net (loss) income per share102,655 100,829 100,472 
Dilutive effect of stock options— — 2,929 
Dilutive effect of performance stock units— — 169 
Dilutive effect of restricted stock units— — 179 
Denominator for diluted net (loss) income per share102,655 100,829 103,750 
Basic net (loss) income per common share$(0.53)$(1.06)$1.62 
Diluted net (loss) income per common share$(0.53)$(1.06)$1.57 
66

PROPETRO HOLDING CORP.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

10. NET (LOSS) INCOME PER SHARE (Continued)
(In thousands, except for per share data)2018 2017 2016
Numerator (both basic and diluted)     
Net income (loss) relevant to common stockholders$173,862
 $12,613
 $(53,147)
Denominator     
Denominator for basic income (loss) per share83,460
 76,371
 44,787
Dilutive effect of stock options3,129
 2,903
 
Dilutive effect of performance stock units277
 59
 
Dilutive effect of non-vested restricted stock units180
 250
 
Denominator for diluted income (loss) per share87,046
 79,583
 44,787
Basic net income (loss) per common share$2.08
 $0.17
 $(1.19)
Diluted net income (loss) per common share$2.00
 $0.16
 $(1.19)
As shown in the table below, the following non-vestedstock options, restricted stock units preferred stock,and performance stock units outstanding as of December 31, 2021, 2020 and stock options2019 have not been included in the calculation of diluted (loss) income (loss) per common share for the years ended December 31, 2018, 20172021, 2020 and 2016 as2019 because they would be anti-dilutive to the calculation above.of diluted net (loss) income per common share:

(In thousands)
202120202019
Stock options798 4,200 — 
Restricted stock units1,413 1,165 — 
Performance stock units1,586 1,019 — 
Total3,797 6,384 — 

70


PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016
13. NET INCOME (LOSS) PER SHARE (Continued)

(Count in thousands)2018 2017 2016
Stock options
 
 4,646
Preferred stock
 
 17,000
Performance stock units
 
 
Non-vested restricted stock units
 
 372
 
 
 22,018
14.11. STOCK‑BASED COMPENSATION
EffectiveStock Option Plan
In March 4, 2013, we adoptedapproved the ProPetro Stock Option Plan of ProPetro Holding Corp. (the "Stock Option Plan") pursuant to which our Board of Directors may grant stock options to our consultants, directors, executives and employees. No awards have been granted under the Stock Option Plan following our Initial Public Offering ("IPO"), and no further awards will be granted under the Stock Option Plan.
2017 Incentive Award Plan
          In March 2017, our shareholders approved the ProPetro Holding Corp. 2017 Incentive Award Plan (the "2017 Incentive Plan") pursuant to which our Board of Directors was authorized to grant stock options, restricted stock units ("RSUs"), performance stock units ("PSUs"), or other stock-based and cash awards to key employees, consultants, directors, executives and directors.employees. The 2017 Incentive Plan as amended, isoriginally authorized to grant up to 4,645,8845,800,000 shares of common stock to be issued upon exercisewith respect to awards granted pursuant to the plan. No awards have been granted under the 2017 Incentive Plan following approval of the options.2020 Incentive Plan (as defined below), and no further awards will be granted under the 2017 Incentive Plan.
2020 Long Term Incentive Plan
          In October 2020, our shareholders approved the ProPetro Holding Corp. 2020 Long Term Incentive Plan (the "2020 Incentive Plan") pursuant to which our Board of Directors may grant stock options, RSUs, PSUs, or other stock-based and cash awards to consultants, directors, executives and employees. The Company’s share price used2020 Incentive Plan authorizes up to estimate4,650,000 shares of common stock to be issued under awards granted pursuant to the fair valueplan. The 2020 Incentive Plan became effective October 22, 2020, and as of such date no further awards will be granted under the option at the grant date was based on a combination of income and market approaches, which are highly complex and sensitive.2017 Incentive Plan.
          The income approach involves the use of a discounted cash flow method, with cash flow projections discounted at an appropriate discount rate. The market approach involves the use of comparable public companies market multiples in estimating the fair value of the Company’s stock. The expected term used to calculate the fair value of all options considers the vesting date2017 Incentive Plan and the grant’s expiration date. The expected volatility was estimated by considering comparable public companies, and2020 Incentive Plan are herein collectively referred to as the risk free rate is based on the U.S treasury yield curve as of the grant date. The dividend assumption is based on historical experience. After becoming a public company, the market price was used to determine the market value of our common stock. Prior to 2015, the Company had granted a total of 3,499,228 options with an exercise price of $3.96 per option, and all options expire 10 years from the date of grant."Incentive Plans".
Stock Options
On June 14, 2013, we granted 2,799,408 stock option awards to certain key employees, officers and directors pursuant to the Stock Option Plan that shall vestvested and becomebecame exercisable based upon the achievement of a service requirement. The options vestvested in 25% increments for each year of continuous service and an option becomesbecame fully vested upon the optionee’s completion of the fourth year of service. The contractual term for the options awarded is 10 years. The fair value of each option award granted iswas estimated on the date of grant using the Black-Scholes option-pricing model. The fair value of the options was estimated at the date of grant using the following assumptions:
Expected volatility45%
Expected dividends$
Expected term (in years)6.25
Risk free rate1.35%
On December 1, 2013, we granted 699,820 stock option awards to certain key employees which were scheduled to vest in four substantially equal annual installments, subject to service and performance requirements and acceleration upon a change in control. As of December 31, 2016 and 2015 the performance requirements were not considered to be probable of achievement for any of the outstanding option awards and 114,456 options were forfeited during the year ended December 31, 2016. Effective March 16, 2017, we terminated the options in connection with our IPO and approved a cash bonus totaling $5.1 million to the holders of the options.
The contractual term for the options awarded is 10 years. The fair value of each option award granted is estimated on the date of grant using the Black-Scholes option-pricing model. The fair value of the options was estimated at the date of grant using the following assumptions:


71


PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016
14. STOCK‑BASED COMPENSATION (Continued)

Expected volatility45%
Expected dividends$
Expected term (in years)6.25
Risk free rate1.83%
On July 19, 2016, we granted 1,274,549 stock option awards to certain key employees, officers and directors pursuant to the Stock Option Plan which are scheduled to vestvested in five substantially equal semi-annual installments commencing in December 2016, subject to a continuing services requirement. The contractual term for the options awarded is 10 years. We fully accelerated vesting of the options in connection with our IPO.
The fair value of each option award granted iswas estimated on the date of grant using the Black- ScholesBlack-Scholes option-pricing model. The fair value of the options was estimated at the date of grant using the following assumptions:
67

PROPETRO HOLDING CORP.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
11. STOCK‑BASED COMPENSATION (Continued)
Expected volatility55%
Expected dividends$
Expected term (in years)5.8
Risk free rate1.22%
 In March 2017, our shareholders approved the ProPetro 2017 Incentive Award Plan ("IAP") pursuant to which our Board of Directors may grant stock options, restricted stock units ("RSUs"), performance stock units ("PSUs"), or other stock-based awards to key employees, consultants, directors and employees. The IAP authorizes up to 5,800,000 shares of common stock to be issued under awards granted pursuant to the plan.          On March 16, 2017, we granted 793,738 stock option awards to certain key employees, officers and directors pursuant to the IAP2017 Incentive Plan which are scheduled to vest in four substantially equal annual installments, subject to a continuing service requirement. The contractual term for the options awarded is 10 years.

The fair value of each stock option award granted iswas estimated on the date of grant using the Black- ScholesBlack-Scholes option-pricing model. The fair value of the options was estimated at the date of grant using the following assumptions:
Expected volatility18%
Expected dividends$
Expected term (in years)6.25
Risk free rate2.23%


72


PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016
14. STOCK‑BASED COMPENSATION (Continued)

A summary of theThere were no new stock option activity during the year ended December 31, 2018 is presented below.
 Number
of Shares
 Weighted
Average
Exercise
Price
Outstanding at January 1, 20184,636,353
 $5.20
Granted
 
Exercised(49,912) $4.95
Forfeited(29,255) $14.00
Expired
 $
Canceled
 $
Outstanding at December 31, 20184,557,186
 $5.14
Exercisable at December 31, 20183,994,990
 $3.90
The weighted average grant-date fair value of stock options grantedgrants during the years ended December 31, 2018, 20172021, 2020 and 2016 was $0, $3.35 and $1.77, respectively.2019.
          As of December 31, 2018,2021, the aggregate intrinsic value for our outstanding stock options was $34.0$1.6 million, and the aggregate intrinsic value for our exercisable stock options was $34.0$1.6 million. The aggregate intrinsic value for the exercised stock options during the year ended December 31, 2021 was $0.7$19.8 million. The remaining contractual term for the outstanding and exercisable stock options as of December 31, 2018, were 5.92021, was 4.1 years and 5.64.1 years, respectively. For
          A summary of the yearsstock option activity during the year ended December 31, 2018, 2017 and 2016, the Company recognized $0.6 million, $2.9 million and $1.6 million, respectively, in compensation expense related to all stock options.2021 is presented below (in thousands, except for exercise price):

Number
of Shares
Weighted
Average
Exercise
Price
Outstanding at January 1, 20214,200 $4.82 
Granted— $— 
Exercised(3,326)$3.42 
Forfeited— $0.00 
Expired(76)$14.00 
Outstanding at December 31, 2021798 $9.77 
Exercisable at December 31, 2021798 $9.77 
Restricted Stock Units (Non-Vested Stock)
          In 2021, we granted 851,885 RSUs to employees, officers and Performance Stock Units

On September 30, 2013, our Boarddirectors pursuant to the 2020 Incentive Plan, which generally vest ratably over a three-year vesting period, in the case of Directors authorizedawards to employees and granted 372,335 restricted stock units (RSUs)officers, and generally vest in full after one year, in the case of awards to directors. RSUs are subject to restrictions on transfer and are generally subject to a key executive.risk of forfeiture if the award recipient ceases to be an employee or director of the Company prior to vesting of the award. Each RSU represents the right to receive either one share of common stock or, as determined by the administrator in its sole discretion, a cash amount equal to the fair market value of the Company at par value $0.001 per share. Under the terms of the award, the sharesone share of common stock subject toon the RSUs were to be paid to the grantee upon change in control, regardless of whether the grantee was affiliated with the Company onday immediately preceding the settlement date. The fair value of the RSUs is measured as the price of the Company’s shares on the grant date which was estimated to be $3.89. The share price used to estimate the fair value of the RSU at the grant date was based on a combination of income and market approaches, which are highly complex and sensitive. The income approach involves the use of a discounted cash flow method, with the cash flow projections discounted at an appropriate discount rate. The market approach involves the use of comparable public companies market multiples in estimating the fair value of the Company’s stock. Effective March 22, 2017, the Board of Directors canceled these RSUs and issued 372,335 new RSUs to the grantee. These issued RSUs are effectively identical to the RSUs granted in 2013, provided, however, that the RSUs was payable in full on March 22, 2018. The fair value of the RSUs issued on March 22, 2017, was based on the Company's closing stock market price at the grant date. In connection with the IPO, we fully recognized the stock compensation expense related to the re-issued RSUs.

In 2018, our Board of Directors granted 319,250 RSUs to employees, directors and executives pursuant to the Incentive Award Plan ("IAP"). Each RSU represents the right to receive one share of common stock. The fair value of the RSUs is based on the closing share price of our common stock on the date of grant. For the years ended December 31, 2018, 20172021, 2020 and 20162019, the recordedCompany recognized stock compensation expense for all RSUs was $2.9 million,of approximately $6.2 million, $5.1 million and $0,$3.5 million, respectively.
          As of December 31, 2018,2021, the total unrecognized compensation expense for all RSUs was approximately $5.7$7.4 million, and is expected to be recognized over a weighted-average period of approximately 1.61.8 years.


68
73


PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016
14.11. STOCK‑BASED COMPENSATION (Continued)

The following table summarizes the restricted stock unitsRSUs activity during the year December 31, 2018:2021 (in thousands, except for fair value):
Number of
Shares
Weighted
Average
Grant Date
Fair Value ("FV")
Outstanding at January 1, 20211,165 $8.50 
Granted852 $9.69 
Vested(589)$8.52 
Forfeited(15)$10.27 
Canceled— $— 
Outstanding at December 31, 20211,413 $9.19 
  Number of
Shares
 Weighted
Average
Grant Date
Fair Value
Outstanding at January 1, 2018 688,744
 $13.66
Granted 319,250
 $18.49
Vested (500,360) $13.87
Exercised 
 $
Forfeited (34,129) $15.99
Expired 
 $
Canceled 
 $
Outstanding at December 31, 2018 473,505
 $16.52
Performance Stock Units

Effective June 5, 2017, our Board of Directors authorized and          In 2021, we granted performance stock unit awards650,774 PSUs to certain key employees and officers as new awards under the IAP.2020 Incentive Plan. Each PSU earned represents the right to receive either one share of common stock or, as determined by the administrator in its sole discretion, a cash amount equal to the fair market value of one share of common stock or amount of cash on the day immediately preceding the settlement date. The actual number of shares of common stock that may be issued under the performance stock unit awardsPSUs ranges from zero0% up to a maximum of twice200% of the target number of performance stock unit awards (“PSUs”)PSUs granted to the participant, based on our total shareholder return ("TSR") relative to a designated peer group, fromgenerally at the dateend of our IPO through December 31, 2019. Effective April 18, 2018, our Boarda three-year period. In addition to the TSR conditions, vesting of Directors authorized and granted PSUs to certain key employees under the IAP. The actual number of shares that may be issued under the PSUs ranges from zero up to a maximum of twice the target number of performance stock unit awards grantedis generally subject to the participant, based on our total shareholder return relative to a designated peer group from January 1, 2018recipient’s continued employment through December 31, 2020.the end of the applicable performance period. Compensation expense is recorded ratably over the corresponding requisite service period. The grant date fair value of performance stock unit awardsPSUs is determined using a Monte Carlo probability model. Grant recipients do not have any shareholder rights until performance relative to the peer group has been determined following the completion of the performance period and shares have been issued.
          For the years ended December 31, 2018, 20172021, 2020 and 20162019 the recordedCompany recognized stock compensation expense for the performance stock units was $2.0PSUs of approximately $5.5 million, $0.4 $1.7 million and $0,$3.8 million, respectively.

The following table summarizes the performance stock unitsinformation about PSUs activity during the year ended December 31, 2018:2021 (in thousands, except for fair value):
Period
Granted
Target Shares Outstanding at January 1, 2021Target
Shares
Granted
Target Shares VestedTarget
Shares
Forfeited
Target Shares Outstanding at December 31, 2021Weighted
Average
Grant Date
FV Per
Share
201884 — (84)— — $27.51 
2019126 — — — 126 $27.49 
2020809 — — — 809 $8.30 
2021— 651 — — 651 $14.76 
Total1,019 651 (84)— 1,586 $12.48 
Weighted Average FV Per Share$12.27 $14.76 $27.51 $— $12.48 
Period
Granted
 Target Shares
Outstanding at
Beginning
of Year
 Target
Shares
Granted
 Target Shares Vested Target
Shares
Forfeited
 Target Shares
Outstanding
at End
of Year
 Weighted
Average
Grant Date
Fair Value per
Share
2017 169,635
 
 
 
 169,635
 $10.73
2018 
 178,975
 
 
 178,975
 $27.51
Total 169,635
 178,975
 
 
 348,610
 $19.34

The total stock compensation expense for the years ended December 31, 2018, 20172021, 2020 and 20162019 for all stock awards was $5.5approximately $11.5 million $9.5, $9.1 million and $1.6$7.8 million, respectively. The total unrecognized stock-based compensation expense as of December 31, 2018 is2021 was approximately $11.5 $16.4 million, and is expected to be recognized over a weighted-average period of approximately 2.0approximately 1.8 years.



69
74



PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016

15.12. INCOME TAXES
The components of the provision for income taxes for the years ended December 31, 2018, 2017 and 2016 are as follows:
($ in thousands)
Year Ended December 31,
202120202019
Federal:
Current$(52)$— $— 
Deferred(15,143)(27,104)47,090 
(15,195)(27,104)47,090 
State:
Current88 221 1,736 
Deferred855 (597)1,668 
943 (376)3,404 
Total income tax expense$(14,252)$(27,480)$50,494 
($ in thousands)2018 2017 2016
Federal:     
Current$
 $(376) $
Deferred48,738
 3,634
 (29,082)
 48,738
 3,258
 (29,082)
State:     
Current1,551
 74
 
Deferred966
 (204) 1,110
 2,517
 (130) 1,110
Total expense (benefit)$51,255
 $3,128
 $(27,972)
Reconciliation between the amounts determined by applying the federal statutory rate of 21% for year ended December 31, 2018 and 35% for the years ended December 31, 20172021, 2020 and 20162019 to income tax (expense)/benefit(benefit) expense is as follows:
($ in thousands)($ in thousands)
Year Ended December 31,
202120202019
($ in thousands)2018 2017 2016
Tax at federal statutory rate$47,275
 $5,510
 $(28,392)
Taxes at federal statutory rateTaxes at federal statutory rate$(14,372)$(28,245)$44,836 
State taxes, net of federal benefit1,874
 176
 (216)State taxes, net of federal benefit61 154 2,504 
Non-deductible expenses2,423
 1,582
 498
Non-deductible expenses745 314 3,683 
Stock-based compensation(426) (655) 
Stock-based compensation(2,549)751 (717)
Valuation allowance(1,151) 273
 879
Valuation allowance825 868 — 
Effect of change in enacted Tax Act
 (3,448) 
Other1,260
 (310) (741)Other1,038 (1,322)188 
Total expense (benefit)$51,255
 $3,128
 $(27,972)
Total income tax (benefit) expenseTotal income tax (benefit) expense$(14,252)$(27,480)$50,494 

70
75


PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016
15.12. INCOME TAXES (Continued)

Deferred tax assets and liabilities are recognized for estimated future tax effects of temporary differences between the tax basis of an asset or liability and its reported amount in the consolidated financial statements. The significant items giving rise to deferred tax assets (liabilities) at December 31, 2018 and 2017, respectively, are as follows:
($ in thousands)
December 31,

20212020
Deferred Income Tax Assets
Accrued liabilities$911 $472 
Allowance for credit losses46 316 
Goodwill and other intangible assets2,161 3,408 
Stock‑based compensation3,382 4,015 
Net operating losses87,822 85,827 
Other56 56 
Total deferred tax assets94,378 94,094 
Valuation allowance(1,693)(868)
Total deferred tax assets — net$92,685 $93,226 
Deferred Income Tax Liabilities
Property and equipment$(152,624)$(166,494)
Prepaid expenses(1,113)(2,073)
Total deferred tax liabilities$(153,737)$(168,567)
Net deferred tax liabilities$(61,052)$(75,341)
($ in thousands)2018 2017
Deferred Income Tax Assets   
Accrued liabilities$769
 $1,264
Allowance for doubtful accounts21
 94
Goodwill and other intangible assets4,010
 5,304
Stock‑based compensation2,632
 2,960
Net operating losses111,580
 56,788
Other63
 69
Noncurrent deferred tax assets119,075
 66,479
Total deferred tax assets119,075
 66,479
Valuation allowance
 (1,151)
Total deferred tax assets — net119,075
 65,328
Deferred Income Tax Liabilities   
Property and equipment(172,164) (68,811)
Prepaid expenses(1,194) (965)
Other
 (131)
Noncurrent deferred tax liabilities(173,358) (69,907)
Net deferred tax liability$(54,283) $(4,579)
At          The Tax Cuts and Jobs Act (the "TCJA") included a reduction to the maximum deduction allowed for net operating losses generated in tax years after December 31, 2018,2017 and the Company had approximately $516.0 millionelimination of carrybacks of net operating losses. Under the Coronavirus Aid, Relief, and Economic Security Act, or the CARES Act, which modified the TCJA, U.S. federal net operating loss carryforwards that("NOLs") generated in taxable periods beginning after December 31, 2017, may be carried forward indefinitely, but the deductibility of such NOLs in taxable years beginning after December 31, 2020, is limited to 80% of taxable income. As of December 31, 2021, the Company had approximately $408.0 million of federal NOLs some of which will begin to expire in 2032 and2035. Approximately $219.5 million of the Company’s federal NOLs relate to pre-2018 periods. As of December 31, 2021, the Company’s state net operating losses ofwere approximately $50.0$50.1 million thatand will begin to expire in 2024. Utilization of net operating loss carryforwards may be limited due to past or future ownership changes. As of December 31, 2018, the Company2021, we determined that $1.7 million valuation allowance was no longer in a cumulative book loss for the current and two prior years. Based on its estimate of future taxable income, the Company determined it is more likely than not that it will utilize itsnecessary against our state deferred tax assets. Accordingly, the valuation allowance against its state deferred tax assets was reversed.
The Company’s U.S. federal income tax returns for the yearsyear ended December 31, 20152018, and through December 31, 2017the most recent filing remain open to examination by the Internal Revenue Service under the applicable U.S. federal statute of limitations provisions. The various states in which the Company is subject to income tax are generally open to examination for the tax years ended after December 31, 2014.

On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (“Tax Act”).  The Tax Act makes broad and complex changes to the U.S. tax code including, but not limited to (1) reducing the U.S. federal corporate tax rate from 35% to 21%, (2) eliminating the corporate alternative minimum tax (“AMT’’) and changing how existing AMT credits can be realized, (3) creating a new limitation on deductible interest expense, (4) changes to bonus depreciation, and (5) changing rules related to use and limitations of net operating loss carryforwards for tax years beginning after December 31, 2017. We have completed our analysis of the Tax Act. The only material items that impacted the Company’s consolidated financial statements in 2017 were bonus depreciation and the corporate rate reduction. While the corporate rate reduction was effective January 1, 2018, we accounted for the effect of the rate change during the year ended December 31, 2017, and through the most recent filing.


76


PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016
15. INCOME TAXES (Continued)

the year of enactment. Consequently, we recorded a $3.4 million decrease to the net deferred          The Company records uncertain tax liability,positions in accordance with a corresponding net adjustment to deferred tax benefit.

In June 2006, the FASB issued FASB Interpretation (FIN) No. 48, Accounting for Uncertainty inASC 740, Income Taxes, — an interpretationon the basis of FASB Statement No. 109 (subsequently codified as ASC 740‑10, Income Taxes, Under FASB Statement No. 168, The FASB Accounting Standards Codification anda two-step process in which (1) we determine whether it is more likely than not that the Hierarchy of Generally Accepted Accounting Principles — a replacement of FASB Statement No. 162). ASC 740‑10 prescribes a comprehensive model for recognizing, measuring, presenting, and disclosing in the consolidated financial statements tax positions taken or expectedwill be sustained on the basis of the technical merits of the position and (2) for those tax positions that meet the more-likely-than-not recognition threshold, we recognize the largest amount of tax benefit that is more than fifty percent likely to be taken on arealized upon ultimate settlement with the related tax return, including a decision to file or not to file in a particular jurisdiction.
The Company evaluated allauthority. As of December 31, 2021, 2020 and 2019, no uncertain tax positions and determined that the aggregate exposure under ASC 740‑10 did not have a material effect on the consolidated financial statements during the year ended December 31, 2018, 2017 and 2016. Therefore, no adjustments have been made to the consolidated financial statements related to the implementation of ASC 740‑10.were recorded. The Company will continue to evaluate its tax positions in accordance with ASC 740‑10740 and will recognize any future effect as either a benefit or charge to income in the applicable period.
Income tax penalties and interest assessments recognized under ASC 740‑10740 are accrued as a tax expense in the period that the Company’s taxes are in an uncertain tax position. Any accrued tax penalties or interest assessments will remain until the uncertain tax position is resolved with the taxing authorities or until the applicable statute of limitations has expired.
16.13. RELATED‑PARTY TRANSACTIONS
The
71

PROPETRO HOLDING CORP.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
13. RELATED-PARTY TRANSACTIONS (Continued)

Corporate Office Building
          Prior to April 2020, the Company leasesrented its corporate officesoffice building and the associated real property from an entity, in which a related party pursuant to a five‑year lease agreement with a five‑year extension option requiring a base rentformer executive officer of the Company has an equity interest for approximately $0.1 million per year. In April 2020, the Company acquired the corporate office building and associated real property for approximately $1.5 million.
Operations and Maintenance Yards
The Company also leases five properties adjacent torents 5 yards from an entity, in which certain former executive officers and a director of the corporate office from related parties withCompany have equity interests and total annual base rentsrent expense for each of the 5 yards was approximately $0.03 million, $0.03 million, $0.1 million, $0.1 million, and $0.2 million.million, respectively. The Company also leased its drilling yard from another entity, in which a certain former executive officer of the Company has an equity interest, for an annual lease expense of approximately $0.1 million during 2020. In November 2020, we terminated the drilling yard lease.
Equipment Rental and Other Services
     The Company obtained equipment maintenance services from an entity that has a family relationship with an executive officer of the Company. During the year ended December 31, 2021 and 2020, the Company incurred approximately $0 and $1.2 million, respectively, for equipment maintenance services associated with this related party.
          At December 31, 2021 and 2020, the Company had no outstanding payables or receivables to or from the above related party.
Pioneer
        On December 31, 2018, we consummated the Pioneer Pressure Pumping Acquisition. In connection with the Pioneer Pressure Pumping Acquisition, Pioneer received 16.6 million shares of our common stock and approximately $110.0 million in cash.
          Revenue from services provided to Pioneer (including idle fees) accounted for approximately $473.8 million, $335.4 million and $524.2 million of our total revenue during the years ended December 31, 2021, 2020 and 2019, respectively.
          In connection with the Pioneer Pressure Pumping Acquisition, the Company agreed to reimburse Pioneer for a certain portion of the retention bonuses paid to former Pioneer employees that were subsequently employed by the Company. During years ended December 31, 2021, 2020 and 2019, the Company fully reimbursed Pioneer approximately $0, $2.7 million and $4.2 million respectively.
          As of December 31, 2021, the total accounts receivable due from Pioneer, including estimated unbilled receivable for services (including idle fees) we provided, amounted to $62.1 million and the amount due to Pioneer was $0. As of December 31, 2020, the balance due from Pioneer for services (including idle fees) we provided amounted to approximately $41.7 million and the amount due to Pioneer was $0.
14. LEASES
          On January 1, 2019, we implemented ASC 842, using the modified retrospective transition method and elected not to restate prior years. Accordingly, the effects of adopting ASC 842 were adjusted in the beginning of 2019 while prior periods are accounted for under the legacy GAAP, ASC 840. There was no cumulative effect adjustment on beginning retained earnings. We also elected other practical expedients provided by the new lease standard, the short-term lease recognition practical expedient in which leases with a term of twelve months or less will not be recognized on the balance sheet and the practical expedient to not separate lease and non-lease components for real estate class of assets. Our discount rate was based on our estimated incremental borrowing rate on a collateralized basis with similar terms and economic considerations as our lease payments at the lease commencement. Below is a description of our operating and finance leases.
72

PROPETRO HOLDING CORP.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
14. LEASES (Continued)
Operating Leases
Description of Lease
          In March 2013, we entered into a ten-year real estate lease contract (the “Real Estate Lease”) with a commencement date of April 1, 2013, as part of the expansion of our equipment yard. The lease is with an entity in which a former director of the Company has a noncontrolling equity ownership interest. For the years ended December 31, 2018, 20172021, 2020 and 2016,2019, the Company paidmade lease payments of approximately$0.4 million, $0.4 million $0.3and $0.4 million, respectively. The assets and $0.2 million, respectively,liabilities under this contract are equally allocated between our cementing and coiled tubing segments. In addition to the contractual lease period, the contract includes an optional renewal of up to ten years, and in management’s judgment the exercise of the renewal option is not reasonably assured. The contract does not include a residual value guarantee, covenants or financial restrictions. Further, the Real Estate Lease does not contain variability in payments resulting from either an index change or rate change. Effective January 1, 2019, the remaining lease term in our present value estimate of the minimum future lease payments was approximately four years.
          We accounted for our Real Estate Lease to be an operating lease. Our assumptions resulted from the existence of the right to control the use of transportation servicesthe assets throughout the lease term. We did not account for the land separately from a related party.the building of the real estate lease because we concluded that the accounting effect was insignificant. As of December 31, 2021, the weighted average discount rate and remaining lease term was 6.7% and 1.3 years, respectively.
The Company also rents equipment in Elk City, Oklahoma from a related party.          As of December 31, 2021, our total operating lease right-of-use asset cost was $1.2 million, and accumulated amortization was $0.8 million. As of December 31, 2020, our total operating lease right-of-use asset cost was $1.2 million, and accumulated amortization was $0.5 million. For the years ended December 31, 2021, 2020 and 2019 we recorded operating lease cost of $0.3 million, $0.3 million and $0.4 million respectively, in our statement of operations.
Finance Leases
Description of Ground Lease
        In 2018, 2017 and 2016,we entered into a ten-year land lease contract (the “Ground Lease”) with an exclusive option to purchase the land exercisable beginning one year from the commencement date of October 1, 2018 through the end of the contractual lease term. In March 2020, the Company exercised its option and purchased the land associated with the Ground Lease for approximately $2.5 million.
          The maturity analysis of liabilities and reconciliation to undiscounted and discounted remaining future lease payments for operating lease as of December 31, 2021 are as follows:
($ in thousands)Totals
2022$389 
202398 
Total undiscounted future lease payments487 
Amount representing interest(21)
Present value of future lease payments (lease obligation)$466 
          The total cash paid $0.2for amounts included in the measurement of our operating lease liability during the year ended December 31, 2021 was approximately $0.4 million $0.2. During the year ended December 31, 2020, the total cash paid for amounts included in the measurement of our operating and finance lease liabilities was approximately $0.4 million and $0.2$0.03 million, respectively.
At December 31, 2018, 2017 and 2016, The non-cash lease obligation we recorded effective January 1, 2019, upon adopting the Company had $0.01 million, $0.02new lease standard, ASC 842, was $2.0 million and $0 in payables, respectively,$3.1 million for operating and approximately $0, $0finance leases, respectively.
73

PROPETRO HOLDING CORP.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
14. LEASES (Continued)
Short-Term Leases
          We elected the practical expedient, consistent with ASC 842, to exclude leases with an initial term of twelve months or less ("short-term lease") from our balance sheet and $0.04 million in receivables, respectively, for related parties for services provided.
All agreements pertainingcontinue to realty property and equipment were entered into during periods where the Company had limited liquidity and related parties secured them on behalf of the Company. All related party receivables and payables are immaterial and have not been separately shown on the face of the financial statements.
17. COMMITMENTS AND CONTINGENCIES
Operating Lease — The Company has various operatingrecord short-term leases for office space and certain property and equipment.as a period expense. For the years ended December 31, 2018, 20172021 and 2016,2020, our short-term asset lease expense was approximately $0.6 million and $1.0 million, respectively.
          In April 2021, we entered into a short-term lease arrangement to lease our turbine (the “Equipment Lease”) with a commencement date of June 1, 2021 through September 30, 2021. We classified the Company recordedEquipment Lease as an operating lease, expenseand during the year ended December 31, 2021, we recognized approximately $3.0 million in lease income recorded as part of $1.7 million, $1.4 million and $1.4 million, respectively. Required remaining lease payments for each fiscal year are as follows:our pressure pumping segment revenue on our statements of operations.


77

PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016

17.15. COMMITMENTS AND CONTINGENCIES (Continued)

Commitments
          We entered into certain commitments for fixed assets, consumables and services incidental to the ordinary conduct of our business, generally for quantities required for our operations and at competitive market prices. These commitments are designed to assure sources of supply and are not expected to be in excess of normal requirements. As of December 31, 2021, there were no outstanding contractual commitments. At December 31, 2021, the total remaining commitments and other obligations for all of our short-term lease and lodging arrangements was $3.7 million.
($ in thousands) 
2019$892
2020721
2021721
2022721
2023 and thereafter2,258
Total$5,313
Contingent Liabilities —          The Company may be subjectenters into purchase agreements with its sand suppliers (the "Sand Suppliers") to various legal actions, claims, and liabilities arising in the ordinarysecure supply of sand as part of its normal course of business. InThe agreements with the Sand Suppliers require that the Company purchase a minimum volume of sand, based primarily on a certain percentage of our sand requirements from our customers or in certain situations based on predetermined fixed minimum volumes, otherwise certain penalties (shortfall fees) may be charged. The shortfall fee represents liquidated damages and is either a fixed percentage of the purchase price for the minimum volumes or a fixed price per ton of unpurchased volumes. Our agreements with Sand Suppliers expire at different times prior to December 31, 2025. During the years ended December 31, 2021, 2020 and 2019, no shortfall fee was recorded. However, one of our Sand Suppliers has filed a suit against us that includes claims related to alleged shortfall fees. The suit is in the early stages, and we are contesting the claims. While we cannot reasonably estimate the outcome of the matter at this time, in the opinion of management, the ultimate disposition of these mattersthe action will not have a materially adverse effect on the Company’s financial position, resultsCompany.
          One of operations, or liquidity.
18. EQUITY CAPITALIZATION
Credit Amendment Equity Infusion
In connectionthe Sand Suppliers ("SandCo") we entered into an agreement to purchase sand ("Texas Sand") has an indirect relationship with the Term Loan and Revolving Credit Facility amendment dated June 8, 2016 (see Note 9), ECP and its related affiliates along with other shareholders infused $40.4 milliona former executive officer of equity into the Company, and we issued 18,007,328 additional sharesbecause beginning in 2018, the Texas Sand was sourced from a mine located on land owned by an entity in which the former executive officer of common stock.

On November 9, 2017, ECP sold 13,800,000 shares of its common stock holdings inthe Company has a secondary offering at $15.07 per share, and sold all of their remaining holdings in October of 2018.

Convertible Preferred Stock
On December 27, 2016, we completed a private placement offering of $170.0 million, issuing 16,999,990 shares of Series A nonparticipating convertible preferred stock, par value $0.001 per share. Costs44% noncontrolling equity interest. The total sand purchased from SandCo during the three months ended March 31, 2020 (the period the former executive was associated with the offering wereCompany) was approximately $7.0 million, resulting in net proceeds to the Company of approximately $163.0$5.3 million.
As of December 31, 2016, 16,999,990 shares2021 and 2020, the Company had issued letters of Series A convertible preferred stock were issuedcredit of $3.7 million and outstanding, convertible into common stock at$3.7 million, respectively, under the conversion price per the private placement agreement. InABL Credit Facility in connection with our IPO, all 16,999,990 sharesthe Company's casualty insurance policy.
Contingent Liabilities
Legal Matters
          In September 2019, a complaint, captioned Richard Logan, Individually and On Behalf of our outstanding Series A Preferred Stock converted to common stock on a 1:1 basis.

Initial Public Offering
On March 22, 2017, we consummated our IPO in which 25,000,000 shares of our common stock, par value $0.001 per share, were sold at a public offering price of $14.00 per share, with 13,250,000 shares issued and sold byAll Others Similarly Situated, Plaintiff, v. ProPetro Holding Corp., et al., (the "Logan Lawsuit"), was filed against the Company and $11,750,000 shares sold by existing stockholders.certain of its then current and former officers and directors in the U.S. District Court for the Western District of Texas.

At December 31, 2018          In July 2020, the Logan Lawsuit Lead Plaintiffs Nykredit Portefølje Administration A/S, Oklahoma Firefighters Pension and Retirement System, Oklahoma Law Enforcement Retirement System, Oklahoma Police Pension and Retirement System, and Oklahoma City Employee Retirement System, and additional named plaintiff Police and Fire Retirement System of the City of Detroit, individually and on behalf of a putative class of shareholders who purchased the Company’s common stock between March 17, 2017 the Company had 100,190,126 and 83,039,854 shares outstanding, respectively.

March 13, 2020, filed a

74
78


PROPETRO HOLDING CORP. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF
15. COMMITMENTS AND FOR THE YEARS ENDED
DECEMBER 31, 2018, 2017 AND 2016CONTINGENCIES (Continued)

third amended class action complaint in the U.S. District Court for the Western District of Texas, alleging violations of Sections 10(b) and 20(a) of the Securities Exchange Act of 1934, as amended, and Rule l0b-5 promulgated thereunder, and Sections 11 and 15 of the Securities Act of 1933, as amended, based on allegedly inaccurate or misleading statements, or omissions of material facts, about the Company’s business, operations and prospects against the Company, and certain of its current and former officers and directors. On September 13, 2021, the Court partially granted and partially denied motions to dismiss filed by the Company and the individual defendants. Discovery is still ongoing.
19.           In May 2020, the U.S. District Court for the Western District of Texas consolidated two shareholder derivative lawsuits previously filed against the Company and certain of its current and former officers and directors into a single lawsuit captioned In re ProPetro Holding Corp. Derivative Litigation (the “Shareholder Derivative Lawsuit”). In August 2020, the plaintiffs in the Shareholder Derivative Lawsuit filed a consolidated complaint alleging (i) breaches of fiduciary duties, (ii) unjust enrichment and (iii) contribution. The plaintiffs did not quantify any alleged damages in its complaint but, in addition to attorneys’ fees and costs, they seek various forms of relief, including (i) damages sustained by the Company as a result of the alleged misconduct, (ii) punitive damages and (iii) equitable relief in the form of improvements to the Company’s governance and controls. On September 15, 2021, the Court granted the Company's motion to dismiss the complaint in its entirety, without prejudice.
           On November 19, 2021, the Company received a demand letter from a law firm representing one of the purported shareholders of the Company that previously filed the dismissed Shareholder Derivative Lawsuit. The demand letter alleged facts and claims substantially similar to the Shareholder Derivative Lawsuit. The Board of Directors has constituted a committee to evaluate the demand letter and recommend a course of action to the Board of Directors, and the committee has retained counsel to assist with its review. The committee’s review is ongoing.
In October 2019, the Company received a letter from the SEC indicating that the SEC had opened an investigation into the Company, which followed the SEC’s issuance of a formal order of investigation, and requesting that the Company provide certain information and documents, including documents related to the Company's expanded audit committee review and related events. In November 2021, the Company entered a settlement with the SEC resolving the investigation. The Company was not required to pay any monetary penalty and has no ongoing undertakings in connection with the settlement.
          We are presently unable to predict the duration, scope or result of the Logan Lawsuit, or any other related lawsuit or investigation. As of December 31, 2021, no provision was made by the Company in connection with this pending lawsuit as the final outcome cannot be reasonably estimated.
Environmental and Equipment Insurance
          The Company is subject to various federal, state and local environmental laws and regulations that establish standards and requirements for protection of the environment. The Company cannot predict the future impact of such standards and requirements, which are subject to change and can have retroactive effectiveness. The Company continues to monitor the status of these laws and regulations. Currently, the Company has not been fined, cited or notified of any environmental violations that would have a material adverse effect upon its financial position, liquidity or capital resources. However, management does recognize that by the very nature of the Company's business, material costs could be incurred in the near term to maintain compliance. The amount of such future expenditures is not determinable due to several factors, including the unknown magnitude of possible regulation or liabilities, the unknown timing and extent of the corrective actions which may be required, the determination of the Company's liability in proportion to other responsible parties and the extent to which such expenditures are recoverable from insurance or indemnification.
Effective November 2021 and in connection with our equipment insurance program renewal, the Company will self-insure up to $10 million per occurrence for certain losses arising from or attributable to fire and/or explosion at the wellsites.
Regulatory Audits
          In 2020, the Texas Comptroller of Public Accounts (the “Comptroller”) commenced a routine audit of the Company's motor vehicle and other related fuel taxes for the periods of July 2015 through December 2020. As of December 31, 2021, the audit is still ongoing and the final outcome cannot be reasonably estimated.
75

PROPETRO HOLDING CORP.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
15. COMMITMENTS AND CONTINGENCIES (Continued)
          In January 2022, we entered into a settlement agreement with the Comptroller for a $10.7 million tax refund, net of consulting fees, in connection with certain limited sales and use tax for the audit period July 1, 2015 through December 31, 2018. The net refund will be recorded in our first quarter of 2022, the period the refund is expected to be received by the Company. During the year December 31, 2021, the net refund received by the Company from the sales and excise and use tax audit was approximately $2.1 million, which was recorded as part of other income in the statement of operations.
16. QUARTERLY FINANCIAL DATA (UNAUDITED)
The following table sets forth our unaudited quarterly results for each of the last four quarters for the years ended December 31, 20182021 and 2017.2020. This unaudited quarterly information has been prepared on the same basis as our annual audited financial statements and includes all adjustments, consisting only of normal recurring adjustments that are necessary to present fairly the financial information for the fiscal quarters presented.
(In thousands, except for per share data)
2021
First QuarterSecond QuarterThird QuarterFourth Quarter
Revenue - Service revenue$161,458 $216,887 $250,099 $246,070 
Gross profit$38,080 $54,050 $61,409 $58,709 
Net income$(20,375)$(8,511)$(5,067)$(20,232)
Net income per common share:
Basic$(0.20)$(0.08)$(0.05)$(0.20)
Diluted$(0.20)$(0.08)$(0.05)$(0.20)
Weighted average common shares outstanding:
Basic101,550 102,398 103,257 103,390
Diluted101,550 102,398 103,257 103,390
2020
First QuarterSecond QuarterThird QuarterFourth Quarter
Revenue - Service revenue$395,069 $106,109 $133,710 $154,344 
Gross profit$94,221 $37,916 $34,118 $38,698 
Net income$(7,804)$(25,920)$(29,184)$(44,112)
Net income per common share:
Basic$(0.08)$(0.26)$(0.29)$(0.44)
Diluted$(0.08)$(0.26)$(0.29)$(0.44)
Weighted average common shares outstanding:
Basic100,687 100,821 100,897 100,911
Diluted100,687 100,821 100,897 100,911

76
 2018
(In thousands, except for per share data)First Quarter Second Quarter Third Quarter Fourth Quarter
Service revenue$385,219
 $459,888
 $434,041
 $425,414
Gross profit$87,097
 $108,000
 $113,895
 $124,993
Net income$36,708
 $39,091
 $46,285
 $51,778
Net income per common share:       
Basic$0.44
 $0.47
 $0.55
 $0.62
Diluted$0.42
 $0.45
 $0.53
 $0.59
Weighted average common shares outstanding:       
Basic83,081
 83,447
 83,544
 83,758
Diluted86,848
 86,878
 86,878
 87,218
        
 2017
(In thousands, except for per share data)First Quarter Second Quarter Third Quarter Fourth Quarter
Service revenue$171,931
 $213,492
 $282,730
 $313,712
Gross profit$22,366
 $36,715
 $57,297
 $51,664
Net income (loss)$(24,351) $4,921
 $21,965
 $10,078
Net income (loss) per common share:       
Basic$(0.43) $0.06
 $0.26
 $0.12
Diluted$(0.43) $0.06
 $0.25
 $0.12
Weighted average common shares outstanding:       
Basic55,996
 83,040
 83,040
 83,040
Diluted55,996
 86,279
 86,264
 86,818




79



Item 9.Changes in and Disagreements with Accountants on Accounting and Financial Disclosure
None.
77


Item 9A. Controls and Procedures
Evaluation of Disclosure Controls and Procedures
         We maintain disclosure controls and procedures that are designed to provide reasonable assurance that the information required to be disclosed by us in our reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms and that such information is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure.
         As required by Rule 13a-15(b) under the Exchange Act, we have evaluated, under the supervision and with the participation of our management, including our principal executive officer principal financial officer and principal accountingfinancial officer, the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) as of the end of the period covered by this report. Based upon that evaluation, our principal executive officer principal financial officer and principal accountingfinancial officer concluded that our disclosure controls and procedures were effective at the reasonable assurance level as of December 31, 2018.2021.
Management’s Report on Internal Control over Financial Reporting
Our         The management of ProPetro Holding Corp. is responsible for establishing and maintaining adequate internal control over financial reporting for the Company, as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act Rule 13a-15(f). See page 48 for Management’s Report on Internal Control Over Financial Reporting. Deloitte & Touche LLP,Act. ProPetro Holding Corp. maintains a system of internal accounting controls designed to provide reasonable assurance, at a reasonable cost, that assets are safeguarded against loss or unauthorized use and that the financial records are adequate and can be relied upon to produce financial statements in accordance with U.S. GAAP. The internal control system is augmented by written policies and procedures, an independent registered public accounting firm, has auditedinternal audit program and the selection and training of qualified personnel. This system includes policies that require adherence to ethical business standards and compliance with all applicable laws and regulations.
         There are inherent limitations to the effectiveness of any control system. A control system, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Also, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within the Company will be detected. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. The Company intends to continually improve and refine its internal controls.
         Under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, we conducted an evaluation of the effectiveness of the design and operation of our internal control over financial reporting as of December 31, 2021 based on criteria established in the 2013 Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). Based on this evaluation, management believes that ProPetro Holding Corp. maintained effective internal control over financial reporting as of December 31, 2018,2021. The independent registered public accounting firm, Deloitte & Touche LLP, Houston, Texas, United States, Auditor Firm ID #34, has audited the consolidated financial statements as stated inof and for the year ended December 31, 2021, and has also issued their report which is included herein. See page 50 for Reporton the effectiveness of Independent Registered Public Accounting Firm on its assessment of ourthe Company’s internal control over financial reporting.reporting, included in this Annual Report under Part II, Item 8 above.
Changes in Internal Control over Financial Reporting
     No         There were no changes in our system of internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that occurred during the quarter ended December 31, 20182021 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.
78


Item 9B. Other Information
None.
Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections
Not applicable.

79


Part III
Item 10.Directors, Executive Officers and Corporate Governance
The          This information required by this Item concerning our Executive Officers, Directors and nominees for Director, Audit Committee members and financial expert(s) and concerning disclosure of delinquent filers under Section 16(a) of the Exchange Act and our Standards of Business Conduct is incorporated herein by reference from our definitiveto the Company’s Proxy Statement for our 2019its 2022 Annual Meeting of Shareholders,Stockholders, which willis expected to be filed with the SEC pursuant to Regulation 14A within 120 days afterbefore the end of our last fiscal year.

April 2022.

80



Item 11.     Executive Compensation
The          This information required by this Item concerning Executive Compensation, material transactions involving Executive Officers and Directors and Compensation Committee interlocks, as well as the Compensation Committee Report, areis incorporated herein by reference from our definitiveto the Company’s Proxy Statement for our 2019its 2022 Annual Meeting of Shareholders,Stockholders, which willis expected to be filed with the SEC pursuant to Regulation 14A within 120 days afterbefore the end of our last fiscal year.April 2022.

81



Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters
The          This information required by this Item concerning the stock ownership of management and five percent beneficial owners and securities authorized for issuance under equity compensation plans is incorporated herein by reference from our definitiveto the Company’s Proxy Statement for our 2019its 2022 Annual Meeting of Shareholders,Stockholders, which willis expected to be filed with the SEC pursuant to Regulation 14A within 120 days afterbefore the end of our last fiscal year.April 2022.

82



Item 13. Certain Relationships and Related Party Transactions, and Director Independence.
The          This information required by this Item concerning certain relationships and related person transactions and director independence is incorporated herein by reference from our definitiveto the Company’s Proxy Statement for our 2019its 2022 Annual Meeting of Shareholders,Stockholders, which willis expected to be filed with the SEC pursuant to Regulation 14A within 120 days afterbefore the end of our last fiscal year.April 2022.

83


Item 14.     Principal Accounting Fees and Services.Services
The          This information required by this Item concerning principal accounting fees and services is incorporated herein by reference from our definitiveto the Company’s Proxy Statement for our 2019its 2022 Annual Meeting of Shareholders,Stockholders, which willis expected to be filed with the SEC pursuant to Regulation 14A within 120 days afterbefore the end of our last fiscal year.April 2022.

84


Part IV
Item 15.     Exhibits and Financial Statement Schedules.
(a)(1) Financial Statements
The Financial Statements in Item 8 are filed as part of this Annual Report on Form 10-K.Report.
(a)(2) Financial Statement Schedules
NoneNone.
(a)(3) Exhibits
The exhibit index attached hereto is incorporated hereinexhibits required to be filed by reference.this Item 15(b) are set forth in the Exhibit Index included below.
(b) See Exhibit Index
(c) None

Item 16.        Form 10-K Summary. [Note: Move this item and the Signatures section to appear after the Exhibit Index]85
None.


SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this Annual Report on Form 10-K to be signed on its behalf by the undersigned, thereunto duly authorized, on February 28, 2019.
ProPetro Holding Corp.
EXHIBIT INDEX

 /s/ Dale Redman
Dale Redman
Chief Executive Officer and Director

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this Annual Report on Form 10-K has been signed by the following persons in the capacities indicated on the date indicated.
SignatureExhibit
Number
TitleDateDescription
2.1
/s/ Dale RedmanChief Executive Officer and Director (Principal Executive Officer)February 28, 2019
Dale Redman
/s/ Jeff SmithChief Financial Officer (Principal Financial Officer)February 28, 2019
Jeff Smith
/s/ Ian DenholmChief Accounting Officer (Principal Accounting Officer)February 28, 2019
Ian Denholm
/s/ Spencer D. ArmourChairmanFebruary 28, 2019
Spencer D. Armour, III
/s/ Steve BealDirectorFebruary 28, 2019
Steve Beal
/s/ Anthony BestDirectorFebruary 28, 2019
Anthony Best
/s/ Pryor BlackwellDirectorFebruary 28, 2019
Pryor Blackwell
/s/ Alan E. DouglasDirectorFebruary 28, 2019
Alan E. Douglas
/s/ Jack MooreDirectorFebruary 28, 2019
Jack Moore
/s/ Royce W. MitchellDirectorFebruary 28, 2019
Royce W. Mitchell
/s/ Mark BergDirectorFebruary 28, 2019
Mark Berg


EXHIBIT INDEX
Exhibit
number
Description
2.1
3.1
3.2
4.13.3
4.1
4.54.2
4.64.3
10.14.4
4.5
10.210.1
10.3#10.2#
10.4#
10.5#
10.6#
10.7#10.3#
10.8#10.4#
10.9#10.5#

10.10#
10.11#
10.12#
10.13#10.6#
10.14#
10.15#
10.16#
10.17#10.7#
10.18#
10.19#10.8#
10.9#
86



10.20#10.10#
10.21#
10.22#
10.23#10.11#
10.24#10.12#
10.25#

10.26#
10.27#10.13#


10.28#10.14#
10.15#
10.16#
10.17#
10.18#
10.19#
10.2910.20#
10.21#
10.22#
10.23#
10.3010.24#
10.3110.25#
10.3210.26#
10.3310.27#
21.110.28#
10.29#
10.30#
87



10.31
10.32
10.33#
10.34#
10.35#
10.36#
10.37#
10.38#
10.39#
21.1(a)
23.123.1(a)
31.131.1(a)
31.231.2(a)
32.132.1(b)
32.232.2(b)
101.INS(a)XBRL Instance Document
101.SCH(a)XBRL Taxonomy Extension Schema Document
101.CAL(a)XBRL Taxonomy Extension Calculation Linkbase Document
101.LAB(a)XBRL Taxonomy Extension Label Linkbase Document
101.PRE(a)XBRL Taxonomy Extension Presentation Linkbase Document
101.DEF(a)XBRL Taxonomy Extension Definition Linkbase Document
104(a)Cover Page Interactive Data File - the cover page interactive data file does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document

(a) Filed herewith.
(b) Furnished herewith.
#    Compensatory plan, contract or arrangement.



Item 16.        Form 10-K Summary
None.
87
88



SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this Annual Report on Form 10-K to be signed on its behalf by the undersigned, thereunto duly authorized, on February 25, 2022.
                        ProPetro Holding Corp.

 /s/ Samuel D. Sledge
Samuel D. Sledge
Chief Executive Officer
Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this Annual Report on Form 10-K has been signed by the following persons in the capacities indicated on the date indicated.
89



SignatureTitleDate
/s/ Samuel D. SledgeChief Executive Officer and Director (Principal Executive Officer)February 25, 2022
Samuel D. Sledge
/s/ David S. SchorlemerChief Financial Officer (Principal Financial Officer)February 25, 2022
David S. Schorlemer
/s/ Elo OmavueziChief Accounting Officer (Principal Accounting Officer)February 25, 2022
Elo Omavuezi
/s/ Phillip A. GobeExecutive Chairman of the BoardFebruary 25, 2022
Phillip A. Gobe
/s/ Spencer D. Armour, IIIDirectorFebruary 25, 2022
Spencer D. Armour, III
/s/ Mark BergDirectorFebruary 25, 2022
Mark Berg
/s/ Anthony BestDirectorFebruary 25, 2022
Anthony Best
/s/ G. Larry LawrenceDirectorFebruary 25, 2022
 G. Larry Lawrence
/s/ Michele VionDirectorFebruary 25, 2022
Michele Vion
/s/ Alan E. DouglasDirectorFebruary 25, 2022
Alan E. Douglas
/s/ Jack MooreDirectorFebruary 25, 2022
Jack Moore
90