The following discussion of our business contains "forward-looking statements," as discussed in Part II, Item 7, ''Management's Discussion and Analysis of Financial Condition and Results of Operations'' below. Our business, operations and financial condition are subject to various risks as set forth in Part I, Item 1A, ''Risk Factors'' below. The following information should be read in conjunction with Management's Discussion and Analysis of Financial Condition and Results of Operations, the Financial Statements and Supplementary Data and related notes and the Risk Factors included elsewhere in this Annual Report on Form 10-K.

Atkore International Group Inc. (collectively with all its subsidiaries referred to in this Annual Report on Form 10-K as "Atkore," the "Company," "we," "us" and "our") was incorporated in the State of Delaware on November 4, 2010. Atkore is the sole stockholder of Atkore International Holdings Inc. ("AIH"), which in turn is the sole stockholder of Atkore International, Inc. ("AII").

We are a leading manufacturer of Electrical Raceway products primarily for the non-residential construction and renovation markets and Mechanical Products and Solutions ("MP&S") for the construction and industrial markets. Electrical Raceway products form the critical infrastructure that enables the deployment, isolation and protection of a structure's electrical circuitry from the original power source to the final outlet. MP&S frame, support and secure component parts in a broad range of structures, equipment and systems in electrical, industrial and construction applications. We believe we hold #1 or #2 positions in the United States by net sales in the vast majority of our products. The quality of our products, the strength of our brands and our scale and national presence provide what we believe to be a unique set of competitive advantages that position us for profitable growth.

On June 9, 2016, the Company's Registration Statement on Form S-1 relating to an initial public offering ("IPO") of our common stock was declared effective by the SEC and on June 15, 2016, we completed the IPO at a price to the public of $16.00 per share. In connection with the IPO, CD&R Allied Holdings, L.P. (the "CD&R Investor"), an affiliate of Clayton, Dubilier & Rice, LLC ("CD&R") sold an aggregate of 12,000,000 shares of our common stock. The CD&R Investor received all of the net proceeds and bore all commissions and discounts from the sale of our common stock. We did not receive any proceeds from the IPO.

Our principal Electrical Raceway products include electrical conduit and fittings, armored cable and fittings, cable trays and mounting systems and fittings, which are critical components of the electrical infrastructure for new construction and maintenance, repair and remodel ("MR&R") markets. Our MP&S principal products are metal framing and in-line galvanized mechanical tube. Our metal framing products are used in the installation of electrical systems and various support structures. In total, we operate 30 manufacturing facilities and 3128 distribution facilities that enable us to efficiently receive materials from our suppliers and deliver products to our customers. In fiscal 2017, 91%2018, 90% of our net sales were to customers located in the United States. In fiscal 2017, we expanded our global footprint in Europe, Middle East and Africa ("EMEA") and Asia Pacific ("APAC") with two acquisitions in the Electrical Raceway space, broadening the Electrical Raceway offerings in these regions beyond what had been previously offered by us.

    

Our products are primarily marketed by commissioned agents and sold directly to electrical and industrial distributors who resell our products under recognized brand names, including Allied Tube & Conduit, AFC Cable Systems, Heritage Plastics, Unistrut, Power-Strut, Cope and Calpipe as well as certain other sub-brands that are used regionally or in niche markets. Our commissioned agents are selected, trained and managed by our regional sales teams and supported by product managers who ensure that agents are adequately knowledgeable and sufficiently trained to represent our brands to our distribution customers. We stimulate end-user demand by promoting our products and solutions directly to architects, electrical engineers, electrical contractors and electrical code authorities across the United States. We also work directly with electrical contractors, who install Electrical Raceway products on new construction or renovation projects to assist them in selecting the most effective electrical raceway solution. In certain of the markets we serve, we market directly to electrical and industrial distributors, original equipment manufacturers ("OEMs") and governmental entities.

We primarily sell and distribute our products through electrical, industrial and specialty distributors and OEMs. For many of the over 13,000 electrical-distributor branches in the United States, our products are must-stock lines that form a staple of their business. We serve a diverse group of end markets, including new construction, MR&R and infrastructure, diversified industrials, alternative power generation, healthcare, data centers and government. End-users, which are typically electrical, industrial and mechanical contractors as well as OEMs, install our products during non-residential, residential and infrastructure construction and renovation projects or in assembly and manufacturing processes.

Distribution-based sales accounted for approximately 84%86% of our net sales for fiscal 2017.2018. We distribute our products to electrical and industrial distributors from our manufacturing and distribution facilities as well as from over 50 dedicated distribution facilities operated by our agents. Our products are also stocked by electrical and industrial distributors who are located in major cities and towns across the United States. Some of our products are purchased by OEMs and used as part of their products and solutions in applications such as utility solar framing, conveyor systems and fabric cover buildings. OEM sales accounted for approximately 16%14% of our net sales for fiscal 2017.2018.

    

Our distribution footprint is concentrated in North America (the United States and Canada), with additional facilities in Australia, China, New Zealand and the United Kingdom.

    

Products are generally delivered to the dedicated distribution centers from our facilities and then subsequently delivered to the customer. In some instances, a product is delivered directly from our manufacturing facility to a customer or end-user. In many cases, our products are bundled and co-loaded when shipped. We contract with a wide range of transport providers to deliver our products, primarily via semi-tractor trailer.

    

Our sales and marketing processes are primarily focused on serving our immediate customers, including electrical, industrial and specialty distributors and OEMs. We believe customers view us as offering a strong value proposition based on our broad product offering, strong brands, short order cycle times, reliability and consistent product quality. For each of fiscal 2018, 2017 and 2016, approximately 90%, 91% and 2015, approximately 91%, 92% and 93%, respectively, of our net sales were sold to customers located in the United States. Our net sales by geographic area were as follows:

    

In fiscal 2017,2018, our top ten customers accounted for approximately 32%33% of net sales. No single customer, even after consolidating all branches of such customer, which often make independent purchasing decisions, accounted for more than 10% of our net sales in each of fiscal 2018, 2017 2016 and 2015.or 2016. Our customers include global electrical distributors (such as Consolidated Electrical Distributors, Inc., Graybar Electric Company, Rexel, Sonepar S.A. and Wesco International, Inc.), independent electrical distributors including super-regional electrical distributors (such as U.S. Electrical Services Inc., Crescent Electric Supply Co. and United Electric Supply Company, Inc.) and members of buying groups (such as Affiliated Distributors, Inc. and IMARK Group, Inc.) as well as industrial distributors and big-box retailers (such as The Home Depot, Inc., Fastenal Company, HD Supply Holdings, Inc., McMaster-Carr Supply Co., Menard, Inc. and W.W. Grainger, Inc.).

    

We use a variety of raw materials in the manufacture of our products. Our primary raw materials are steel, copper and polyvinyl chloride ("PVC") resin. We believe that sources for these raw materials are well-established, generally available on world markets and are in sufficient quantity that we may avoid disruption to our business if we encountered an interruption from one of our existing suppliers. Our primary suppliers of steel are ArcelorMittal, AK Steel and Nucor; our primary suppliers of copper are AmRod and Freeport McMoran; and our primary suppliers of PVC resin are Axiall,Westlake, Formosa and Oxy Vinyls. We strive to maintain strong relationships with our suppliers.

    

    

We currently manufacture products in 30 facilities and operate a total footprint of approximately five5 million square feet of manufacturing and distribution space in six countries. Our headquarters are located in Harvey, Illinois, which is also the location of our largest manufacturing facility. Similar to our distribution footprint, our manufacturing footprint is currently concentrated in the United States, with additional facilities in Australia, China, New Zealand and the United Kingdom.

    

The industries in which we operate are highly competitive. Our principal competitors range from national manufacturers to smaller regional manufacturers and differ by each of our product lines. We also face competition from manufacturers in Canada, Mexico and several other international markets, depending on the particular product. We believe our customers purchase from us because we provide value through the quality of our products and the timeliness of our delivery. Competition is generally on the basis of product offering, product innovation, quality, service and price.

    

There are many competitors in each of our segments. The main competitors in each of these segments are listed below:

    

Patents and other proprietary rights can be important to our business. We also rely on trade secrets, manufacturing know-how, continuing technological innovations, and licensing opportunities to maintain and improve our competitive position. We periodically review third-party proprietary rights, including patents and patent applications, in an effort to avoid infringement of third-party proprietary rights, identify licensing opportunities and monitor the intellectual property claims of others.

    

We own a portfolio of patents and trademarks andtrademarks. Other than licenses to commercially available third-party software, we do not believe that any of our licenses to third-party intellectual property are alsomaterial to our business taken as a licensee of certain patents and a licensor of other patents.whole. Patents for individual products extend for varying periods according to the date of patent filing or grant and the legal term of patents in the various countries where patent protection is obtained. We rely on both trademark registration and common law protection for trademarks. Trademark rights may potentially extend indefinitely and are dependent upon national laws and use of the trademarks.

    

    

Historically, information technology has not been a significant differentiator for us in our markets, however, we believe that ease of doing business with us will become increasingly important to our growth. Currently, we operate our business using widely commercially available hardware and software products with well-developed support services. In addition to these widely available IT products, we developed a new application for our agents which we believe will improve the overall order entry process. Additionally, during fiscal 2016, we invested more than $6.0 million and installed and implemented a new general ledger and financial reporting system for the entire Company replacing a number of systems used in various parts of the Company. We have also chosen to migrate our email service and various other information technology services to a cloud computing platform hosted by Microsoft. During fiscal 2017, we launched an 18-month $10.0 million project that establishes an integrated system for order management, advanced warehouse management, finished goods inventory management and accounts receivable. We invested more than $10.0 million to date for this project, which went live in the fourth quarter of fiscal 2018.

    

As of September 30, 2017,2018, we employed approximately 3,500 total full-time equivalent employees of whom approximately 12%13% are temporary or contract workers. Our employees are primarily located in the United States, with about 15%14% employed at our international locations in Australia, Canada, China, New Zealand and the United Kingdom.

    

As of September 30, 2017,2018, approximately 40%26% of our employees globally were represented by a union under a collective bargaining agreement. All unions are either located in the United States or Canada with no unions or Worker's Councils at any of our other locations abroad.

From time to time our collective bargaining agreements expire and come up for re-negotiation. Our collective bargaining agreement in Harvey, Illinois expired in April 2017. During fiscal 2017, the Company and the United Steelworkers Union reached agreement on the terms of a new collective bargaining agreement which expires in April 2020. Ourfor our New Bedford Massachusetts facility hasexpired in February 2018, and we successfully negotiated a contractnew agreement which now expires in February 2018. The2023. Our Harvey, SMPF contractIllinois Special Metal Processing Facility agreement with the United Steelworkers Union, is set to expire ininvolving a bargaining unit of 12 employees, expired on November 2018, and our Wayne, Michigan11, 2018. We anticipate that the new collective bargaining agreement will be ratified by the union members within calendar 2018. Our Harvey Illinois collective bargaining agreement with the Iron Workers Union is set toUnited Steelworkers, involving nearly 400 represented employees, does not expire in Januaryuntil April 2020. We believe our relationship with our employees is good.

    

Our facilities are subject to various federal, state, local and non-U.S. requirements relating to the protection of human health, safety and the environment. Among other things, these laws govern the use, storage, treatment, transportation, disposal and management of hazardous substances and wastes; regulate emissions or discharges of pollutants or other substances into the air, water, or otherwise into the environment; impose liability for the costs of investigating and remediating, and damages resulting from, present and past releases of hazardous substances and protect the health and safety of our employees.

    

We have incurred, and expect to continue to incur, capital expenditures in addition to ordinary course costs to comply with applicable current and future environmental, health and safety laws, such as those governing air emissions and wastewater discharges. In addition, government agencies could impose conditions or other restrictions in our environmental permits which increase our costs. These laws are subject to change, which can be frequent and material. More stringent federal, state or local environmental rules or regulations could increase our operating costs and expenses.

    

The cost of compliance with environmental, health and safety laws and capital expenditures required to meet regulatory requirements is not anticipated to have a material effect on our financial condition, results of operations, cash flows or competitive position.

    

In October 2013, the State of Illinois filed a complaint against our subsidiary Allied Tube, alleging violations of the Illinois Environmental Protection Act relating to discharges to a storm sewer system that terminates at Allied Tube's Harvey, Illinois manufacturing facility. The State sought an injunction ordering Allied Tube to take immediate corrective action to abate the alleged violations and civil penalties as permitted by applicable law. Allied Tube has reviewed management practices and made improvements to its diesel fuel storage and truck maintenance areas to resolve the State's claims. We have recently entered into a consent order that requiresrequired Allied Tube to pay a nominal penalty, install base low-flow oil and water separation equipment and take certain additional remedial actions to resolve the State's claims. We do not currently expect that any suchremaining obligations would have a material effect on our financial condition, results of operations or cash flows.

    

In August 2014, we received from the Illinois Environmental Protection Agency, or the "IEPA," the terms of a proposed new stormwater discharge permit for our Harvey, Illinois manufacturing facility. Because the facility did not meet the zinc limit set forth in the proposed permit, the Company was in negotiations with the IEPA to agree upon mutually acceptable discharge limits. During these negotiations, the facility was operating under an extension of the terms of our existing stormwater discharge permit. In October 2016, we received the final permit. A mutually agreed upon compliance plan is part of the permit and we expect to achieve compliance in accordance with a four-year schedule. The compliance plan includes studies to reduce zinc emitted from galvanizing manufacturing operations, implementation of more rigorous management practices, evaluation of the installation of passive/cost effective stormwater treatment and receiving stream studies to determine if a less stringent permit limit will be as protective of the water system as the current permit limit. Given the scope and time frame of the compliance plan, we do not expect that achieving compliance with either the stormwater discharge permit or the plan will have a material effect on our financial condition, results of operations or cash flows.

    

We received from the City of Phoenix the terms of an industrial wastewater discharge permit renewal that contains more rigorous wastewater discharge limits for our Phoenix, Arizona facility. We do not currently expect that any such obligations would have a material effect on our financial condition, results of operations or cash flows.

    

We are continually investigating, remediating or addressing contamination at our current and former facilities. For example, we are currently monitoring groundwater contamination at our Wayne, Michigan facility. Future remediation activities may be required to address contamination at or migrating from the Wayne, Michigan site. Many of our current and former facilities have a history of industrial usage for which additional investigation and remediation obligations could arise in the future and which could materially adversely affect our business, financial condition, results of operations or cash flows.

    

Demand for our products is affected by a number of general business and economic conditions. A decline in the United States and international markets in which we operate could materially and adversely affect our business, financial position, results of operations or cash flows. Our profit margins, as well as overall demand for our products, could decline as a result of a large number of factors beyond our control, including economic recessions, changes in end-user preferences, consumer confidence, inflation, availability of credit, fluctuation in interest and currency exchange rates and changes in the fiscal or monetary policies of governments in the regions in which we operate.

    

During the most recent United States economic recession, which began in the second half of 2007 and continued through June of 2009, demand for our products declined significantly. Another economic downturn in any of the markets we serve may result in a reduction of sales and pricing for our products. If the creditworthiness of our customers declines, we could face increased credit risk and some, or many, of our customers may not be able to pay us amounts when they become due. While the United States recession that began in 2007 has ended and there has been growth in the United States construction markets that we serve, there can be no assurance that any improvement will be sustained or continue.

    

We cannot predict the duration of current economic conditions, or the timing or strength of any future recovery of activities in our markets. Weakness in the markets in which we operate could have a material adverse effect on our business, financial condition, results of operations or cash flows. We may have to close underperforming facilities from time to time as warranted by general economic conditions and/or weakness in the markets in which we operate. In addition to a reduction in demand for our products, these factors may also reduce the price we are able to charge for our products. This, combined with an increase in excess capacity, could negatively impact our business, financial condition, results of operations or cash flows.

    

Our business is largely dependent on the non-residential construction industry. Approximately 39% of our net sales in fiscal 20172018 were directly related to United States new non-residential construction. For new construction, we estimate that our product installation typically lags United States non-residential starts by six to twelve months. The United States non-residential construction industry is cyclical, with product demand based on numerous factors such as availability of credit, interest rates, general economic conditions, consumer confidence and other factors that are beyond our control. United States non-residential construction starts, as reported by Dodge, reached a historic low of 680 million square feet in our fiscal 2010 and increased to 1,0491,151 million square feet in our fiscal 2017,2018, which remains well below historical levels. We expect to capitalize on any further recovery in non-residential construction activity over the coming years and potentially drive higher margins by leveraging the scalability of our operations.

    

From time to time we have been adversely affected in various parts of the country by declines in non-residential building construction starts due to, among other things, changes in tax laws affecting the real estate industry, high interest rates and the level of non-residential construction activity. Continued uncertainty about current economic conditions will continue to pose a risk to our business, financial position, results of operations and cash flows, as participants in this industry may postpone spending in response to tighter credit, negative financial news and/or declines in income or asset values, which could have a continued material negative effect on the demand for our products.

    

Our results of operations are impacted by changes in commodity prices, primarily steel, copper and PVC resin. Historically, we have not engaged in material hedging strategies for raw material purchases. Substantially all of the products we sell (such as steel conduit, tubing and framing, copper wiring in our cables, and PVC conduit) are subject to price fluctuations because they are composed primarily of steel, copper or PVC resin, three industrial commodities that are subject to price volatility. This volatility can significantly affect our gross profit. We also watch the market trends of certain other commodities, such as zinc (used in the galvanization process for a number of our products), electricity, natural gas and diesel fuel, as such commodities can be important to us as they impact our cost of sales, both directly through our plant operations and indirectly through transportation and freight expense.

    

Although, on an aggregate basis in the current year, we seek to recoverhave successfully recovered increases in raw material prices through price increases in our products, we havemay not always beenbe completely successful.successful in managing market fluctuations in the future. In addition, in periods of declining prices for our raw materials we may face pricing pressure from our customers. We generally sell our products on a spot basis (and not under long-term contracts). Any increase in raw material prices that is not offset by an increase in our prices, or our inability to maintain price levels in an environment of declining raw material prices, could materially and adversely affect our business, financial position, results of operations or cash flows.

    

    

Our operating costs increase when freight or energy costs rise. During periods of increasing freight and energy costs, we might not be able to fully recover our operating cost increases through price increases without reducing demand for our products. The cost of fuel is largely unpredictable and has fluctuated significantly in recent years, reaching historically high levels at times. Fuel availability, as well as pricing, is also impacted by political and economic factors that are beyond our control.

In addition, we are dependent on third-party freight carriers to transport many of our products. Our access to third-party freight carriers is not guaranteed, and we may be unable to transport our products at economically attractive rates in certain circumstances, particularly in cases of adverse market conditions or disruptions to transportation infrastructure. Similarly, increasing energy costs, in particular, the cost of diesel fuel, could put a strain on the transportation of materials and products if it forces certain transporters to close. Our business, financial position, results of operations or cash flows could be materially and adversely affected if we are unable to pass all of the cost increases on to our customers, if we are unable to obtain the necessary energy supplies or if freight carrier capacity in our geographic markets were to decline significantly or otherwise become unavailable.

    

A substantial portion of our revenue is generated through our operations in the United States. Although we have not been substantially impacted by imports historically, imports of products similar to those manufactured by us may reduce the volume of products sold by domestic producers and depress the selling prices of our products and those of our competitors.

    

We believe import levels are affected by, among other things, overall worldwide product demand, the trade practices of foreign governments, the cost of freight, the challenges involved in shipping, government subsidies to foreign producers and governmentally imposed trade restrictions, such as quotas, tariffs, and other trade barriers in the United States. Increased imports of products similar to those manufactured by us in the United States could materially and adversely affect our business, financial position, results of operations or cash flows.

    

The market for certain of our products is influenced by federal, state, local and international governmental regulations and trade policies (such as the American Recovery and Reinvestment Act of 2009, Underwriters Laboratories, National Electric Code and American Society of Mechanical Engineers) as well as other policies, including those imposed on the non-residential construction industry (such as the National Electrical Code and corresponding state and local laws based on the National Electrical Code). These regulations and policies are subject to change. In the event that there would be changes in the National Electrical Code and any similar state, local or non-U.S. laws, including changes that would allow for alternative products to be used in the non-residential construction industry or that would render less restrictive or otherwise reduce the current requirements under such laws and regulations, the scope of products that would serve as alternatives to products we produce would increase. As a result, competition in the industries in which we operate could increase, with a potential corresponding decrease in the demand for our products. In addition, in the event that changes in such laws would render current requirements more restrictive, we may be required to change our products or production processes to meet such increased restrictions, which could result in increased costs and cause us to lose market share. Any changes to such regulations, laws and policies could materially and adversely affect our business, financial position, results of operations or cash flows.

    

Although weather patterns affect our operating results throughout the year, adverse weather historically has reduced construction activity in our first and second fiscal quarters. In contrast, our highest volume of net sales historically has occurred in our third and fourth fiscal quarters.

    

Most of our businesses experience seasonal variation as a result of the dependence of our customers on suitable weather to engage in construction projects. Generally, during the winter months, construction activity declines due to inclement weather, frozen ground and shorter daylight hours. For example, during the spring of 2014, extremely cold weather significantly reduced the level of construction activities in the United States, thereby impacting our net sales. In addition, to the extent that hurricanes, severe storms, floods, other natural disasters or similar events occur in the geographic regions in which we operate, our results of operations may be adversely affected. We anticipate that fluctuations of our operating results from period to period due to seasonality will continue in the future.

    

To satisfy existing obligations and support the development of our business, we depend on our ability to generate cash flow from operations and to borrow funds and issue securities in the capital markets. We may require additional financing for liquidity, capital requirements or growth initiatives. We may not be able to obtain financing on terms and at interest rates that are favorable to us or at all. Any inability by us to obtain financing in the future could materially and adversely affect our business, financial position, results of operations or cash flows.

    

We are subject to numerous federal, state, local and non-U.S. environmental, health and safety laws governing, among other things, the generation, use, storage, treatment, transportation, disposal and management of hazardous substances and wastes, emissions or discharges of pollutants or other substances into the environment, investigation and remediation of, and damages resulting from, releases of hazardous substances and the health and safety of our employees. We have incurred, and expect to continue to incur, capital expenditures in addition to ordinary course costs to comply with applicable current and future environmental, health and safety laws, such as those governing air emissions and wastewater discharges. In addition, government agencies could impose conditions or other restrictions in our environmental permits which increase our costs. These laws are subject to change, which can be frequent and material. More stringent federal, state or local environmental rules or regulations could increase our operating costs and expenses. Furthermore, our operations are governed by the United States Occupational Safety and Health Administration, or "OSHA." OSHA regulations may change in a way that increases our costs of operations. Our failure to comply with applicable environmental, health and safety laws and permit requirements could result in civil or criminal fines or penalties, enforcement actions, and regulatory or judicial orders enjoining or curtailing operations or requiring corrective measures such as the installation of pollution control equipment, which could materially and adversely affect our business, financial position, results of operations or cash flows.

    

From time to time, we may be held liable for the costs to address contamination at any real property we have ever owned, operated or used as a disposal site. We are currently, and may in the future be, required to investigate, remediate or otherwise address contamination at our current or former facilities. Many of our current and former facilities have a history of industrial usage for which additional investigation, remediation or other obligations could arise in the future and that could materially and adversely affect our business, financial position, results of operations or cash flows. For example, as we sell, close or otherwise dispose of facilities, we may need to address environmental issues at such sites, including any previously unknown contamination.

    

We could be subject to third-party claims for property damage, personal injury and nuisance or otherwise as a result of violations of, or liabilities under, environmental, health or safety laws or in connection with releases of hazardous or other materials at any current or former facility. We could also be subject to environmental indemnification or other claims in connection with assets and businesses that we have divested.

We cannot assure you that any costs relating to future capital and operating expenditures to maintain compliance with environmental, health and safety laws, as well as costs to address contamination or environmental claims, will not exceed any current estimates or adversely affect our business, financial position, results of operations or cash flows. In addition, any unanticipated liabilities or obligations arising, for example, out of discovery of previously unknown conditions or changes in law or enforcement policies, could materially and adversely affect our business, financial position, results of operations or cash flows.

    

A significant asset included in our working capital is accounts receivable from customers. As of September 30, 2018, one customer, Sonepar Management US, Inc., represented 11% of the Company's accounts receivable balance due to increased sales in the last 60 days of the year. See Note 19, ''Segment Information'' to the accompanying consolidated financial statements included elsewhere in this Annual Report. If customers responsible for a significant amount of accounts receivable become insolvent or otherwise unable to pay for products and services, or become unwilling or unable to make payments in a timely manner, our business, financial position, results of operations or cash flows could be materially and adversely affected. A significant deterioration in the economy could have an adverse effect on the servicing of these accounts receivable, which could result in longer payment cycles, increased collection costs and defaults in excess of management's expectations. Deterioration in the credit quality of several major customers at the same time could materially and adversely affect our business, financial position, results of operations or cash flows.

    

In general, we do not have long-term contracts with our customers. As a result, although our customers periodically provide indications of their product needs and purchases, they generally purchase our products on an order-by-order basis, and the relationship, as well as particular orders, can be terminated at any time. The loss or bankruptcy of, or significant decrease in business from, any of our major customers could materially and adversely affect our business, financial position, results of operations or cash flows.

    

    

If our working capital needs increase, the amount of liquidity we have at our disposal to devote to other uses will decrease. A decrease in liquidity could, among other things, limit our flexibility, including our ability to make capital expenditures and to complete acquisitions that we have identified, thereby materially and adversely affecting our business, financial condition, results of operations and cash flows.

    

We provide pension benefits through a number of noncontributory and contributory defined benefit retirement plans covering eligible United States employees. As of September 30, 2017,2018, we estimated that our pension plans were underfunded by approximately $25$17 million. The funded status represents five plans, all of which are frozen and do not accrue any additional service cost. As such, the funded status is primarily impacted by the performance of the underlying assets supporting the plan and changes in interest rates or other factors, which may trigger additional cash contributions. Our pension obligation is calculated annually and is based on several assumptions, including then-prevailing conditions, which may change from year to year. If in any year our assumptions are inaccurate, we could be required to expend greater amounts than anticipated.

    

Our business depends on the operation of our manufacturing and distribution facilities. It is possible that we could experience prolonged periods of reduced production or distribution capacity due to interruptions in the operations of our facilities or those of our key suppliers. It is also possible that operations may be disrupted due to other unforeseen circumstances such as power outages, explosions, fires, floods, accidents and severe weather conditions. Availability of raw materials and delivery of products to customers could be affected by logistical disruptions. To the extent that lost production or distribution capacity could not be compensated for at unaffected facilities and depending on the length of the outage, our sales and production costs could be adversely affected.

    

We utilize various third-party agents and distributors to market, sell and distribute our products and to directly interface with our customers and end-users by providing customer service and support. No single agent or distributor accounts for a material percentage of our annual net sales. We do not have long-term contracts with our third-party agents and distributors, who could cease offering our products. In addition, many of our third-party agents and distributors with whom we transact business also offer the products of our competitors to our ultimate customers and they could begin offering our products with less prominence. The loss of a substantial number of our third-party agents or distributors or a dramatic deviation from the amount of sales they generate, including due to an increase in their sales of our competitors' products, could reduce our sales and could materially and adversely affect our business, financial position, results of operations or cash flows.

We use our information systems to, among other things, manage our manufacturing operations, manage inventories and accounts receivable, make purchasing decisions and monitor our results of operations, and process, transmit and store sensitive electronic data, including employee, supplier and customer records. As a result, the proper functioning of our IT systems is critical to the successful operation of our business. Our information systems include proprietary systems developed and maintained by us. In addition, we depend on IT systems of third parties, such as suppliers, retailers and OEMs to, among other things, market and distribute our products, develop new products and services, operate our website, host and manage our services, store data, process transactions, respond to customer inquiries and manage inventory and our supply chain. Although our IT systems are protected through physical and software safeguards and remote processing capabilities exist, our IT systems or those of third parties whom we depend upon are still vulnerable to natural disasters, power losses, unauthorized access, telecommunication failures and other problems. If critical proprietary or third-party IT systems fail or are otherwise unavailable, including as a result of system upgrades and transitions, our ability to process orders, track credit risk, identify business opportunities, maintain proper levels of inventories, collect accounts receivable, pay expenses and otherwise manage our business would be adversely affected.

Cyber incidents can result from deliberate attacks or unintentional events. These incidents can include, but are not limited to, gaining unauthorized access to digital systems for purposes of misappropriating assets or sensitive information, corrupting data, or causing operational disruption. Cybersecurity attacks in particular are becoming more sophisticated and include, but are not limited to, malicious software, attempts to gain unauthorized access to data (either directly or through our vendors) and other electronic security breaches. Despite our security measures, our IT systems and infrastructure or those of our third parties may be vulnerable to such cyber incidents. The result of these incidents could include, but are not limited to, disrupted operations, misstated or misappropriated financial data, theft of our intellectual property or other confidential information (including of our customers, suppliers and employees), liability for stolen assets or information, increased cyber security protection costs and reputational damage adversely affecting customer or investor confidence. In addition, if any information about our customers, including payment information, were the subject of a successful cybersecurity attack against us, we could be subject to litigation or other claims by the affected customers. We have incurred costs and may incur significant additional costs in order to implement the security measures we feel are appropriate to protect our IT systems.

    

As of September 30, 2017,2018, we had goodwill of $147.7$170.1 million, intangible assets of $291.9 million, and indefinite-lived intangiblesother long-lived assets of $93.9$214.9 million. Goodwill and indefinite-lived intangible assets are not amortized and are subject to impairment testing at least annually. Future triggering events, such as declines in our cash flow projections or customer demand, may cause impairments of our goodwill or long-lived assets based on factors such as the price of our common stock, projected cash flows, assumptions used, control premiums or other variables.

    

In addition, if we divest long-lived assets at prices below their asset value, we must write them down to fair value resulting in long-lived asset impairment charges, which could adversely affect our financial position or results of operations. For example, in fiscal 2015 we recorded asset impairments of $27.9 million primarily related to our announced Fence and Sprinkler exit. See Note 13, ''Goodwill and Intangible Assets'' to the accompanying consolidated financial statements included elsewhere in this Annual Report. We cannot accurately predict the amount and timing of any impairment of assets, and we may be required to recognize goodwill or other asset impairment charges which could materially and adversely affect our results of operations.

    

As of September 30, 2017,2018, we employed approximately 3,500 total full-time equivalent employees, a significant percentage of whom work at our 30 manufacturing facilities. Our business involves complex manufacturing processes and there is a risk that an accident resulting in property damage, personal injury or death could occur in one of our facilities. In addition, prior to the introduction of new products, our employees test such products under rigorous conditions, which could potentially result in injury or death. The outcome of any personal injury, wrongful death or other litigation is difficult to assess or quantify and the cost to defend litigation can be significant. As a result, the costs to defend any action or the potential liability resulting from any such accident or death or arising out of any other litigation, and any negative publicity associated therewith or negative effects on employee morale, could have a negative effect on our business, financial position, results of operations or cash flows. In addition, any accident could result in manufacturing or product delays, which could negatively affect our business, financial position, results of operations or cash flows.

    

We are exposed to construction defect and product liability claims relating to our various products if our products do not meet customer expectations. Such claims and liabilities may arise out of the quality of raw materials or component parts we purchase from third-party suppliers, over which we do not have direct control, or due to our fabrication, assembly, or manufacturedamage in shipment of our products. In addition, we warrant certain of our products to be free of certain defects and could incur costs related to paying warranty claims in connection with defective products. We cannot assure you that we will not experience material losses or that we will not incur significant costs to defend or pay for such claims.

    

    

From time to time, we are also involved in government inquiries and investigations, as well as consumer, employment, tort proceedings and other litigation. We cannot predict with certainty the outcomes of these legal proceedings and other contingencies. The outcome of some of these legal proceedings and other contingencies could require us to take actions which would adversely affect our operations or could require us to pay substantial amounts of money. Additionally, defending against these lawsuits and proceedings may involve significant expense and diversion of management's attention and resources from other matters.

    

Our use of contractual provisions, confidentiality procedures and agreements, and patent, trademark, copyright, unfair competition, trade secret and other laws to protect our intellectual property and other proprietary rights may not be adequate. We have registered intellectual property (mainly trademarks and patents) in more than 7685 countries. Because of the differences in foreign trademark, patent and other intellectual property or proprietary rights laws, we may not receive the same protection in foreign countries as we would in the United States.

    

Litigation may be necessary to enforce our intellectual property rights or to defend against claims by third parties that our products infringe their intellectual property rights. Any litigation or claims brought by or against us could result in substantial costs and diversion of our resources. A successful intellectual property infringement suit against us could prevent us from manufacturing or selling certain products in a particular area, which could materially and adversely affect our business, financial position, results of operations or cash flows.

    

    

One or more of these factors could materially and adversely affect our business, financial position, results of operations or cash flows.

    

We continually seek to develop products and solutions that allow us to stay at the forefront of the needs of the Electrical Raceway and MP&S markets. The success of new products depends on a variety of factors, including but not limited to, timely and successful product development, the effective consummation of strategic acquisitions, market acceptance and demand, competitive response, protection of associated intellectual property and avoidance of third-party infringement of the Company's intellectual property, our ability to manage risks associated with product life cycles, the effective management of inventory and purchase commitments, the availability and cost of raw materials and the quality of our initial products during the initial period of introduction. Some of the foregoing factors are beyond our control and we cannot fully predict the ultimate success of the introduction of new products, especially in the early stages of innovation. In introducing new products and implementing our innovation strategies, any delays, unexpected costs, diversion of resources, loss of key employees or other setbacks could materially and adversely affect our business, financial position, results of operations or cash flows.

    

The majority of our net sales are facilitated through the extension of credit to our customers, whose ability to pay is dependent, in part, upon the economic strength of the industries and geographic areas in which they operate. We offer credit to customers, either through unsecured credit that is based solely upon the creditworthiness of the customer, or secured credit for materials sold for a specific job where the security lies in lien rights associated with the material going into the job. The type of credit offered depends both on the financial strength of the customer and the nature of the business in which the customer is involved. End users, resellers and other non-contractor customers generally purchase more on unsecured credit than secured credit. The inability of our customers to pay off their credit lines in a timely manner, or at all, would adversely affect our business, financial condition, results of operations and cash flows. Furthermore, our collections efforts with respect to non-paying or slow-paying customers could negatively impact our customer relations going forward.

    

Because we depend on the creditworthiness of our customers, if the financial condition of our customers declines, our credit risk could increase. Significant contraction in our markets, coupled with tightened credit availability and financial institution underwriting standards, could adversely affect certain of our customers. Should one or more of our larger customers declare bankruptcy, it could adversely affect the collectability of our accounts receivable, bad debt reserves and net income.

    

Our business, financial position or results of operations could be materially and adversely affected by our inability to continue importing raw materials, component parts and/or finished goods under the regulatory regime applicable to our business. Although we seek to have alternate sources and recover increases in input costs through price increases in our products, regulatory changes or other governmental actions could result in the need to change suppliers or incur cost increases that cannot, in the short term, or in some cases even the long term, be offset by our prices. Such changes could reduce our gross profit, net income and cash flow. Any of these consequences could materially and adversely affect our business, financial position, results of operations or cash flows.

    

In connection with any acquisitions or joint ventures, we may acquire liabilities or defects such as legal claims, including but not limited to third partythird-party liability and other tort claims; claims for breach of contract; employment-related claims; environmental liabilities, conditions or damage; permitting, regulatory or other compliance with law issues; liability for hazardous materials; or tax liabilities. If we acquire any of these liabilities, and they are not adequately covered by insurance or an enforceable indemnity or similar agreement from a creditworthy counterparty, we may be responsible for significant out-of-pocket expenditures. In connection with any divestitures, we may incur liabilities for breaches of representations and warranties or failure to comply with operating covenants under any agreement for a divestiture. In addition, we may indemnify a counterparty in a divestiture for certain liabilities of the subsidiary or operations subject to the divestiture transaction. These liabilities, if they materialize, could materially and adversely affect our business, financial position, results of operations or cash flows.

    

In addition, if we were to undertake a substantial acquisition for cash, the acquisition would likely need to be financed in part through additional financing from banks, through public offerings or private placements of debt or equity securities or through other arrangements. Such acquisition financing might decrease our ratio of earnings to fixed charges and adversely affect other leverage criteria and our credit rating. We cannot assure you that the necessary acquisition financing would be available to us on acceptable terms if and when required. Moreover, acquisitions financed through the issuance of equity securities could cause our stockholders to experience dilution.

    

The United States Foreign Corrupt Practices Act, or the "FCPA," and similar foreign anti-corruption laws generally prohibit companies and their intermediaries from making improper payments or providing anything of value to influence foreign government officials for the purpose of obtaining or retaining business or obtaining an unfair advantage. Recent years have seen a substantial increase in the global enforcement of anti-corruption laws, with more frequent voluntary self-disclosures by companies, aggressive investigations and enforcement proceedings by both the United States Department of Justice and the United States Securities and Exchange Commission, or the "SEC," resulting in record fines and penalties, increased enforcement activity by non-U.S. regulators, and increases in criminal and civil proceedings brought against companies and individuals.

We have operations in Australia, Canada, China, New Zealand and the United Kingdom and sell our products in many additional countries. As we acquire additional businesses, we often become responsible for such businesses' prior violations of anti-corruption laws, if any. Our internal policies provide for compliance with all applicable anti-corruption laws for both us, third-party representatives, distributors and for our joint venture operations. Our continued operation and expansion outside the United States, including in developing countries, could increase the risk of such violations in the future. Despite our training and compliance programs, we cannot assure you that our internal control policies and procedures always will protect us from unauthorized reckless or criminal acts committed by our employees, agents or joint venture partners. In the event that we believe or have reason to believe that our employees, agents or distributors have or may have violated applicable anti-corruption laws, including the FCPA, we may be required to investigate or have outside counsel investigate the relevant facts and circumstances, which can be expensive and require significant time and attention from senior management. Violations of these laws may result in severe criminal or civil sanctions, which could disrupt our business and result in a material adverse effect on our business, financial condition, results of operations or cash flows.

    

As a public company, we are subject to the requirements under the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010, or the "Dodd-Frank Act." The SEC has adopted requirements under the Dodd-Frank Act for companies that use certain minerals and metals, known as conflict minerals, in their products, whether or not these products are manufactured by third parties. These requirements require companies to conduct due diligence and disclose whether or not such minerals originate from the Democratic Republic of Congo and adjoining countries. There are costs associated with complying with these disclosure requirements, including for efforts to determine the sources of conflict minerals used in our products and other potential changes to products, processes or sources of supply as a consequence of such verification activities. In addition, compliance with these requirements could adversely affect the sourcing, supply and pricing of materials used in those products and we may face reputational challenges if we are unable to verify the origins for all "conflict minerals" used in products through the procedures we have implemented. We may also encounter challenges to satisfy customers that may require all of the components of products purchased to be certified as conflict free. If we are not able to meet customer requirements, customers may choose to disqualify us as a supplier.

    

Our ability to provide efficient distribution of products to our customers is an integral component of our overall business strategy. In the aftermath of terrorist attacks in the United States, federal, state and local authorities have implemented and continue to implement various security measures that affect the raw material supply network in the United States and abroad. If security measures disrupt or impede the receipt of sufficient raw materials, we may fail to meet the needs of our customers or may incur increased expenses to do so.

    

As of September 30, 2017,2018, we had approximately $580.1$912.2 million of total long-term consolidated indebtedness outstanding (including current portion) under AII's credit facilities ("Credit Facilities"), which consist of: (i) an asset-based credit facility ("ABL Credit Facility"); and (ii) the first lien term loan facility (the "First Lien Term Loan Facility"). As of September 30, 2017,2018, AII had $173.0$315.1 million of available borrowing capacity under the ABL Credit Facility and there were no outstanding borrowings (excluding $8.6$9.9 million of letters of credit issued under the facility). In addition, subject to certain conditions and without the consent of the then existing lenders, the loans under the First Lien Term Loan Facility may be expanded (or a new term loan facility, revolving credit facility or letter of credit facility added) by up to $235.0 million, plus an additional amount not to exceed specified coverage ratios. In addition, we are able to incur additional indebtedness in the future, subject to the limitations contained in the agreements governing our indebtedness. Our indebtedness could have important consequences to you. Because of our indebtedness:

    

We and our subsidiaries may incur substantial additional indebtedness in the future. The terms of the credit agreements governing the Credit Facilities do not fully prohibit our subsidiaries from incurring additional debt. If our subsidiaries are in compliance with certain coverage ratios set forth in the agreements governing the Credit Facilities, they may be able to incur substantial additional indebtedness, which may increase the risks created by our current indebtedness. In addition, subjectSubject to certain conditions and without the consent of the then existing lenders, the loans under the First Lien Term Loan Facility may be expanded (or a new term loan facility, revolving credit facility or letter of credit facility added) by up to $125.0$235.0 million, plus an additional amount not to exceed specified coverage ratios. In addition, subject to certain conditions and without the consent of the then existing lenders, the loans under the ABL Credit Facility may be expanded by up to $100 million, and $75.0the credit agreements governing the Credit Facilities allow for up to $50.0 million respectively,of second lien facilities, plus an additional amount not to exceed a specified leverage ratio. As of September 30, 2017,2018, we were able to borrow an additional $173.0$315.1 million under the ABL Credit Facility. In addition, we can request an increase in the commitments to our ABL Credit Facility from the participating banks or other banks of up to $75.0 million under the terms of the facility.

    

A significant portion of our outstanding indebtedness bears interest or will bear interest at variable rates. As a result, increases in interest rates would increase the cost of servicing our indebtedness and could materially and adversely affect our business, financial position, results of operations or cash flows. As of September 30, 2017, assuming2018, LIBOR exceeded 1.00%,; therefore, each one percentage point change in interest rates would have resulted in a change of approximately $5.0$9.3 million in the annual interest expense on the First Lien Term Loan Facility. As of September 30, 2017,2018, assuming availability was fully utilized, each one percentage point change in interest rates would have resulted in a change of approximately $4.1$3.3 million in annual interest expense on the ABL Credit Facility. Additionally, if the ABL Credit Facility were fully utilized, the margin we pay on borrowings would increase by 0.50% from the current level and we would incur additional interest expense of $1.6 million. The impact of increases in interest rates could be more significant for us than it would be for some other companies because of our indebtedness, thereby affecting our profitability.

Our indebtedness currently has a non-investment grade rating, and any rating, outlook or watch assigned could be lowered or withdrawn entirely by a rating agency if, in that rating agency's judgment, current or future circumstances relating to the basis of the rating, outlook or watch, such as adverse changes to our business, so warrant. Any future lowering of our ratings, outlook or watch likely would make it more difficult or more expensive for us to obtain additional debt financing.

    

The restrictions in the Credit Facilities may prevent us from taking actions that we believe would be in the best interest of our business and may make it difficult for us to execute our business strategy successfully or effectively compete with companies that are not similarly restricted. We may also incur future debt obligations that might subject us to additional restrictive covenants that could affect our financial and operational flexibility. Additionally, we may be required to make accelerated payments due to the covenants and restrictions contained in the Credit Facilities. We may be unable to refinance our indebtedness, at maturity or otherwise, on terms acceptable to us or at all.

    

The ability of AII to comply with the covenants and restrictions contained in the Credit Facilities may be affected by economic, financial and industry conditions beyond our control including credit or capital market disruptions. The breach of any of these covenants or restrictions could result in a default that would permit the applicable lenders to declare all amounts outstanding thereunder to be due and payable, together with accrued and unpaid interest. If we are unable to repay indebtedness, lenders having secured obligations, such as the lenders under the Credit Facilities, could proceed against the collateral securing the indebtedness. In any such case, we may be unable to borrow under the Credit Facilities and may not be able to repay the amounts due under such facilities. This could materially and adversely affect our business, financial position, results of operations or cash flows and could cause us to become bankrupt or insolvent.

    

We may be unable to maintain a level of cash flows from operating activities sufficient to permit us to pay the principal and interest on our indebtedness. If our cash flow and capital resources are insufficient to fund our debt service obligations, we may be forced to reduce or delay capital expenditures, sell assets, seek to obtain additional equity capital or restructure our indebtedness. In the future, our cash flow and capital resources may not be sufficient for payments of interest on and principal of our indebtedness, and such alternative measures may not be successful and may not permit us to meet our scheduled debt service obligations.

    

    

If our subsidiary AII cannot make scheduled payments on its indebtedness, it will be in default and the lenders under the Credit Facilities could terminate their commitments to loan money or foreclose against the assets securing their borrowings, and we could be forced into bankruptcy or liquidation.

    

Our operations are conducted entirely through our subsidiaries, and our ability to generate cash to fund our operations and expenses, to pay dividends or to meet debt service obligations is highly dependent on the earnings and the receipt of funds from our subsidiaries through dividends or intercompany loans. Deterioration in the financial condition, earnings or cash flow of AII and its subsidiaries for any reason could limit or impair their ability to pay such distributions. Additionally, to the extent our subsidiaries are restricted from making such distributions under applicable law or regulation or under the terms of our financing arrangements, or are otherwise unable to provide funds to the extent of our needs, there could be a material adverse effect on our business, financial condition, results of operations or cash flows.

For example, the agreements governing the Credit Facilities significantly restrict the ability of our subsidiaries to pay dividends, make loans or otherwise transfer assets to us. Furthermore, our subsidiaries are permitted under the terms of the Credit Facilities to incur additional indebtedness that may restrict or prohibit the making of distributions, the payment of dividends or the making of loans by such subsidiaries to us.

The market price of our common stock may fluctuate significantly. Among the factors that could affect our stock price are:

Stock markets have experienced extreme volatility in recent years that has been unrelated to the operating performance of particular companies. These broad market fluctuations may adversely affect the trading price of our common stock. In the past, following periods of volatility in the market price of a company's securities, class action litigation has often been instituted against the affected company. Any litigation of this type brought against us could result in substantial costs and a diversion of our management's attention and resources, which could materially and adversely affect our business, financial position, results of operations or cash flows.

The trading market for our common stock depends in part on the research and reports that securities or industry analysts publish about us or our business. If one or more of the analysts that covers our common stock downgrades our stock or publishes misleading or unfavorable research about our business, our stock price would likely decline. If one or more of the analysts ceases coverage of our common stock or fails to publish reports on us regularly, demand for our common stock could decrease, which could cause our common stock price or trading volume to decline.

If, in the future, we decide to issue debt or equity securities that rank senior to our common stock, it is likely that such securities will be governed by an indenture or other instrument containing covenants restricting our operating flexibility. Additionally, any convertible or exchangeable securities that we issue in the future may have rights, preferences and privileges more favorable than those of our common stock and may result in dilution to owners of our common stock. We and, indirectly, our stockholders, will bear the cost of issuing and servicing such securities. Because our decision to issue debt or equity securities in any future offering will depend on market conditions and other factors beyond our control, we cannot predict or estimate the amount, timing or nature of our future offerings. Thus, holders of our common stock will bear the risk of our future offerings reducing the market price of our common stock and diluting the value of their stock holdings in us.

Our IPO was completed in June 2016. As a public company, we are subject to the reporting, accounting and corporate governance requirements of the NYSE, the Exchange Act, the Sarbanes-Oxley Act and the Dodd-Frank Act that apply to issuers of listed equity, which impose certain significant compliance requirements, costs and obligations upon us. The changes necessitated by being a publicly listed company require a significant commitment of additional resources and management oversight which increase our operating costs. Further, to comply with the requirements of being a public company, we may need to undertake various actions, such as implementing new internal controls and procedures and hiring additional accounting or internal audit staff. In addition, we may identify control deficiencies which could result in a material weakness or significant deficiency. In the past, we have identified material weaknesses, all of which have since been remediated. We did not identify any material weaknesses for fiscal 2017.2018.

The expenses associated with being a public company include increases in auditing, accounting and legal fees and expenses, investor relations expenses, increased directors' fees and director and officer liability insurance costs, registrar and transfer agent fees and listing fees, as well as other expenses. As a public company, we are required, among other things, to define and expand the roles and the duties of our board of directors and its committees and institute more comprehensive compliance and investor relations functions. Failure to comply with the Sarbanes-Oxley Act or Dodd-Frank Act could potentially subject us to sanctions or investigations by the SEC, the NYSE or other regulatory authorities.

Our amended and restated certificate of incorporation and our second amended and restated by-laws, ("amended and restated by-laws") include a number of provisions that may discourage, delay or prevent a change in our management or control over us that stockholders may consider favorable. For example, our amended and restated certificate of incorporation and amended and restated by-laws collectively:

These provisions may prevent our stockholders from receiving the benefit from any premium to the market price of our common stock offered by a bidder in a takeover context. Even in the absence of a takeover attempt, the existence of these provisions may adversely affect the prevailing market price of our common stock if the provisions are viewed as discouraging takeover attempts in the future.

Our amended and restated certificate of incorporation and amended and restated by-laws may also make it difficult for stockholders to replace or remove our management. Furthermore, the existence of the foregoing provisions as well as the significant amount of common stock that the CD&R Investor owns, could limit the price that investors might be willing to pay in the future for shares of our common stock. These provisions may facilitate management entrenchment that may delay, deter, render more difficult or prevent a change in our control, which may not be in the best interests of our stockholders.

The stock market in general, and market prices for the securities of companies like ours in particular, have from time to time experienced volatility that often has been unrelated to the operating performance of the underlying companies. These broad market and industry fluctuations may adversely affect the market price of our common stock, regardless of our operating performance. In certain situations in which the market price of a stock has been volatile, holders of that stock have instituted securities class action litigation against the company that issued the stock. If any of our stockholders were to bring a similar lawsuit against us, the defense and disposition of the lawsuit could be costly and divert the time and attention of our management and could materially and adversely affect our business, financial position, results of operations or cash flows.

We do not currently intend to declare and pay dividends on our common stock for the foreseeable future. We currently intend to use our future earnings, if any, to repay debt, to fund our growth, to develop our business, for working capital needs and for general corporate purposes. Therefore, you are not likely to receive any dividends on your common stock for the foreseeable future, and the success of an investment in shares of our common stock depends upon any future appreciation in their value. There is no guarantee that shares of our common stock will appreciate in value or even maintain the price at which our stockholders have purchased their shares. Payments of dividends, if any, are at the sole discretion of our board of directors after taking into account various factors, including general and economic conditions, our financial condition and operating results, our available cash and current and anticipated cash needs, capital requirements, contractual, legal, tax and regulatory restrictions and implications of the payment of dividends by us to our stockholders or by our subsidiaries (including AII) to us, and such other factors as our board of directors may deem relevant. In addition, our operations are conducted almost entirely through our subsidiaries. As such, to the extent that we determine in the future to pay dividends on our common stock, none of our subsidiaries will be obligated to make funds available to us for the payment of dividends. Further, the agreements governing the Credit Facilities significantly restrict the ability of our subsidiaries to pay dividends or otherwise transfer assets to us. In addition, Delaware law imposes additional requirements that may restrict our ability to pay dividends to holders of our common stock.

Our amended and restated certificate of incorporation contains provisions permitted under the action asserting a claim arising under the General Corporation Law of the State of Delaware ("DGCL") relating to the liability of directors. These provisions eliminate a director's personal liability to the fullest extent permitted by the DGCL for monetary damages resulting from a breach of fiduciary duty, except in circumstances involving:

The principal effect of the limitation on liability provision is that a stockholder will be unable to prosecute an action for monetary damages against a director unless the stockholder can demonstrate a basis for liability for which indemnification is not available under the DGCL. These provisions, however, should not limit or eliminate our rights or any stockholder's rights to seek non-monetary relief, such as an injunction or rescission, in the event of a breach of a director's fiduciary duty. These provisions do not alter a director's liability under federal securities laws. The inclusion of this provision in our amended and restated certificate of incorporation may discourage or deter stockholders or management from bringing a lawsuit against directors for a breach of their fiduciary duties, even though such an action, if successful, might otherwise have benefited us and our stockholders.

Our amended and restated 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 is, to the fullest extent permitted by law, 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 to us or our stockholders by any of our directors, officers, other employees, agents or stockholders, (iii) any action asserting a claim arising out of or under the DGCL, or as to which the DGCL confers jurisdiction on the Court of Chancery of the State of Delaware (including, without limitation, any action asserting a claim arising out of or pursuant to our amended and restated certificate of incorporation or our amended and restated by-laws) or (iv) any action asserting a claim that is governed by the internal affairs doctrine. As a stockholder in our company, you are deemed to have notice of and have consented to the provisions of our amended and restated certificate of incorporation related to choice of forum. The choice of forum provision in our amended and restated certificate of incorporation may limit our stockholders' ability to obtain a favorable judicial forum for disputes with us or any of our directors, officers, other employees, agents or stockholders, which may discourage lawsuits with respect to such claims. Alternatively, if a court were to find the choice of forum provision contained in our amended and restated certificate of incorporation to be inapplicable or unenforceable in an action, we may incur additional costs associated with resolving such action in other jurisdictions, which could materially and adversely affect our business, financial position, results of operations or cash flows.

    

As of November 17, 2017,18, 2018, there were 2 stockholderswas one stockholder of record of our common stock. This number excludes stockholders whose stock is held in nominee or street name by brokers.

We have not and do not currently intend to declare or pay dividends on our common stock for the foreseeable future. We currently intend to use our future earnings, if any, to repay debt, to fund our growth, to develop our business, for working capital needs and for general corporate purposes. Our ability to pay dividends to holders of our common stock is significantly limited as a practical matter by the Credit Facilities insofar as we may seek to pay dividends out of funds made available to us by AII or its subsidiaries, because AII's debt instruments directly or indirectly restrict AII's ability to pay dividends or make loans to us. Any future determination to pay dividends on our common stock will be subject to the discretion of our board of directors and dependdepends upon various factors, including our results of operations, financial condition, liquidity requirements, capital requirements, level of indebtedness, contractual restrictions with respect to payment of dividends, restrictions imposed by Delaware law, general business conditions and other factors that our board of directors may deem relevant.

    

The following table contains information, as of September 30, 2017,2018, about the amount of common shares to be issued upon the exercise of outstanding options, performance share options ("PSUs") and restricted stock units ("RSUs") granted under the Omnibus Incentive Plan ("Omnibus Incentive Plan").

We are a leading manufacturer of Electrical Raceway products primarily for the non-residential construction and renovation markets and MP&S for the construction and industrial markets. Electrical Raceway products form the critical infrastructure that enables the deployment, isolation and protection of a structure's electrical circuitry from the original power source to the final outlet. MP&S frame, support and secure component parts in a broad range of structures, equipment and systems in electrical, industrial and construction applications. We believe we hold #1 or #2 positions in the United States by net sales in the vast majority of our products. The quality of our products, the strength of our brands and our scale and presence provide what we believe to be a unique set of competitive advantages that position us for profitable growth.

The following factors may affect our results of operations in any given period:

We believe that our business and demand for our products is influenced by two main economic indicators: United States gross domestic product, or "GDP," and non-residential construction starts, measured in square footage. The United States non-residential construction market has experienced modest growth over the past few years, in line with United States GDP. Our historic results have been positively impacted by growth in the non-residential construction market, as such growth leads to greater demand for our products. MR&R activity generally increases and represents a greater share of non-residential construction activity during challenging periods in the economic or construction cycle. During those periods, our MR&R demand as a percentage of total demand typically increases, providing a more consistent revenue stream for our business.

Our acquisition strategy has focused primarily on growing market share by complementing our existing portfolio with synergistic products and expanding into end-markets that we have not previously served. In total, we have invested over $400 million in acquisitions since 2011.

Product diversification has been a core element to our growth strategy. Prior to 2013, our Electrical Raceway offering primarily consisted of steel and copper products. At that time, we produced PVC conduit from a single facility in Georgia, and we did not have a meaningful presence in the market. In 2013 and 2014, we completed the acquisitions of Heritage Plastics, Liberty Plastics, Ridgeline and APPI, which significantly increased our portfolio of PVC products, including PVC conduit, fittings, elbows and sweeps. The additional scale, which included new operations in the Northeast, Midwest, Southwest and Western United States, enabled us to more comprehensively serve our largest electrical distribution customers in this product line and significantly increased our market share and presence in the Electrical Raceway market. These acquisitions also substantially increased our cross-selling opportunities, providing a meaningful avenue for growth going forward.

In 2015, we acquired SCI, a manufacturer of electrical fittings for steel, flexible and liquidtight conduit as well as armored cable. SCI enhanced the breadth of our product portfolio and is representative of the opportunities we have in our fragmented markets to add complementary products that will further support our growth and customer value proposition.

On May 18, 2017, we acquired Marco Cable Management ("Marco"), a leading designer and manufacturer of wire basket cable tray, PVC trunking and aluminum power poles. Marco's product portfolio adds value to our electrical distribution partners in the United Kingdom and expands the Company's presence in the United Kingdom and the rest of Europe.

On September 1, 2017, we acquired Flexicon Limited ("Flexicon"), a leading global manufacturer of metallic and non-metallic flexible cable protection systems that carry many international and market product approvals and serves the industrial, commercial and infrastructure sectors in more than 55 countries.

We expect to continue to pursue synergistic acquisitions as part of our growth strategy to expand our product offerings.

    

In 2012, we sold our interest in a joint venture in Saudi Arabia that represented our only investment in the Middle East because we determined that it did not provide sufficient earnings or strategic value. During that same year, we also sold two low-margin, commodity-oriented businesses in the United States for which we had limited market presence or competitive differentiation—our hollow structural tube business based in Morrisville, Pennsylvania and our sprinkler system fabrication business. During 2013, we further reduced our non-domestic footprint by closing one facility in Brazil, selling the remainder of our Brazilian operations and closing our Acroba subsidiary in France.

See Note 5,3, ''Divestitures'' and Note 6, ''Restructuring Charges and Asset Impairments'' and Note 11, ''Assets Held for Sale'' to the accompanying consolidated financial statements included elsewhere in this Annual Report.

See Note 1, ''Basis of Presentation and Summary of Significant Accounting Policies'' to the accompanying consolidated financial statements included elsewhere in this Annual Report.

Starting in fiscal 2016, the Company has a fiscal year that ends on September 30. Prior to fiscal 2016, the fiscal year ended on the last Friday in September. Fiscal year 20172018 and 20152017 were 52-week fiscal years which ended on September 30, 20172018 and September 25, 2015,30, 2017, respectively. Fiscal year 2016 was a 53-week fiscal year which ended on September 30, 2016. Our fiscal quarters end on the last Friday in December, March and June.

Net sales represents external sales of Electrical Raceway products to the non-residential construction and MR&R markets and MP&S products and solutions to the commercial and industrial markets. Net sales includes gross product sales and freight billed to our customers, net of allowances for rebates, sales incentives, trade promotions, product returns and discounts.

Cost of sales includes all costs directly related to the production of goods for sale. These costs include direct material, direct labor, production related overheads, excess and obsolescence costs, lower-of-cost-or-market provisions, freight and distribution costs and the depreciation and amortization of assets directly used in the production of goods for sale.

Selling, general and administrative costs includesexpenses include payroll related expenses including salaries, wages, employee benefits, payroll taxes, variable cash compensation for both administrative and selling personnel and consulting and professional services fees and other costs incurred in becoming a public company.fees. Also included are compensation expense for share-based awards, restructuring-related charges, third-party professional services and translation gains or losses for foreign currency trade transactions.

    

Net sales increased $26.2 million, or 2.4%, to $1,094.8 million for fiscal 2017 compared to $1,068.6 million for fiscal 2016. The increase was due primarily to higher average selling prices of $70.3 million resulting from the pass-through impact of higher input costs and our ability to earn a premium from meeting customer expectations of product availability, delivery service levels and co-loading capabilities. Additionally, sales from the acquisition of Marco and Flexicon during 2017 contributed $6.6 million. The increase in sales was partially offset by lower volume of products sold of $24.1 million largely due to lower demand across all product lines. Metal electrical conduit and fittings product line sales partially decreased as a key customer began fulfilling a portion of their demand from a second source beginning in fiscal 2016. Lastly, sales decreased $20.2 million due to lower working days during fiscal 2017.

Net sales decreased $46.3 million, or 10.1% to $410.5 million for fiscal 2017 compared to $456.8 million for fiscal 2016. The decrease in net sales was primarily due to $43.9 million of lower volume of product sold mostly due to lower demand for mechanical pipe products within the solar end-market and $9.2 million resulting from fewer working days during fiscal 2017. Additionally, sales decreased $7.8 million related to the Fence and Sprinkler exit partially offset by a $16.2 million increase in average selling prices resulting from the pass-through impact of higher input costs and our ability to earn a premium from meeting customer expectations of product availability, delivery service levels and co-loading capabilities..