This Annual Report should be read in conjunction with the consolidated financial statements and accompanying notes included in this report.

In addition to historical information, this Annual Report contains forward-looking statements that involve risks and uncertainties. Such forward-looking statements relate to future events and our operations, objectives, expectations, performance, financial condition and intentions. When used in this Annual Report, the words “expect,” “intend,” “plan,” “believe,” “anticipate,” “estimate” and variations of such words and similar expressions are intended to identify forward-looking statements. Forward-looking statements in this Annual Report include, in particular, statements regarding:

We do not intend to revise any forward-looking statements in order to reflect any change in our expectations or events or circumstances that may subsequently arise. You should carefully review and consider the various disclosures included in this Annual Report and in our other filings made with the SEC that attempt to advise interested parties of the risks and factors that may affect our business, prospects and results of operations.

Set forth below is selected consolidated financial and other data of Teekay Tankers Ltd. and its subsidiaries for fiscal years 20132014 through 2017,2018, which have been derived from our consolidated financial statements. The following table should be read together with, and is qualified in its entirety by reference to, Item 5 – Operating and Financial Review and Prospects included herein, and the historical financial statements and accompanying notes and the Report of Independent Registered Public Accounting Firm thereon (which is included herein), with respect to the fiscal years 2018, 2017 2016 and 2015.2016.

Historically, the tanker industry has been cyclical, experiencing volatility in profitability due to changes in the supply of and demand for tanker capacity and changes in the supply of and demand for oil and oil products. The cyclical nature of the tanker industry may cause significant increases or decreases in the revenues we earn from our vessels and may also cause significant increases or decreases in the value of our vessels. If the tanker market is depressed, our earnings may decrease. Our exposure to industry business cycles is more acute because of our exposure to the spot tanker market, which is more volatile than the tanker industry generally. Our ability to operate profitably in the spot market and to recharter our other vessels upon the expiration or termination of their charters will depend upon, among other factors, economic conditions in the tanker market.

The factors affecting the supply of and demand for tankers are outside of our control, and the nature, timing and degree of changes in industry conditions are unpredictable.

Historically, the tanker markets have been volatile as a result of the many conditions and factors that can affect the price and the supply of, and demand for, tanker capacity. Changes in demand for transportation of oil over longer distances and in the supply of tankers to carry that oil may materially affect our revenues, profitability and cash flows.

GlobalAlthough global crude oil and gas prices have declinedmoderately recovered since mid-2014.falling from the highs of mid-2014, prices have not returned to those same highs and remain volatile due to global and regional geopolitical, economic and strategic risks and changes. A continuation of lower oil prices or a further decline in oil prices may adversely affect our business, results of operations and financial condition and our ability to pay dividends, as a result of, among other things:

Crude oil prices have declined since mid-2014, which has generally benefited the tanker market as it has led to higher oil demand, stronger refining margins, additional import demand for stockpiling purposes and lower bunker costs. A significant increase in crude oil prices compared to current levels could reverse many of these positive drivers and negatively impact tanker freight rates.

Demand for our vessels and services in transporting oil depends upon world and regional oil markets. Any decrease in shipments of crude oil in those markets could have a material adverse effect on our business, financial condition and results of operations. Historically, those markets have been volatile as a result of the many conditions and events that affect the price, production and transport of oil, including competition from alternative energy sources. Past slowdowns of the U.S. and world economies have resulted in reduced consumption of oil products and decreased demand for our vessels and services, which reduced vessel earnings. Additional slowdowns could have similar effects on our operating results and may limit our ability to expand our fleet.

The spot-charter market is highly volatile and fluctuates based upon tanker and oil supply and demand. The successful operation of our vessels in the spot-charter market depends upon, among other things, obtaining profitable spot charters and minimizing, to the extent possible, time spent waiting for charters and time spent traveling unladen to load cargo. Future spot rates may not be sufficient to enable our vessels trading in the spot tanker market to operate profitably or to provide sufficient cash flow to service our debt obligations.

The operation of oil tankers and transportation of crude oil and refined petroleum products are extremely competitive businesses. Competition arises primarily from other tanker owners, including major oil companies and independent tanker companies, some of which have substantially greater financial strength and capital than do we or Teekay Corporation. Competition for the transportation of oil and oil products can be intense and depends on price and the location, size, age, condition of the tanker and the acceptability of the tanker and its operators to the charterers. Our competitive position may erode over time.

Our tankers operate in markets that have historically exhibited seasonal variations in tanker demand and, therefore, in spot-charter rates. This seasonality may result in quarter-to-quarter volatility in our results of operations. Tanker markets are typically stronger in the winter months as a result of increased oil consumption in the northern hemisphere but weaker in the summer months as a result of lower oil consumption in the northern hemisphere and refinery maintenance. In addition, unpredictable weather patterns during the winter months tend to disrupt vessel scheduling, which historically has increased oil price volatility and oil trading activities in the winter months. As a result, revenues generated by the tankers in our fleet have historically been weaker during our fiscal quarters ended June 30 and September 30, and stronger in our fiscal quarters ended December 31 and March 31.

Economic downturns and financial crises in the global markets could produce illiquidity in the capital markets, market volatility, heightened exposure to interest rate and credit risks, and reduced access to capital markets. If global financial markets and economic conditions significantly deteriorate in the future, we may face restricted access to the capital markets or bank lending, which may make it more difficult and costly to fund future growth. Decreased access to such resources could have a material adverse effect on our business, financial condition and results of operations.

Economic downturns in the global financial markets may lead to a decline in our customers’ operations or ability to pay for our services, which could result in decreased demand for our vessels and services. Our customers’ inability to pay could also result in their default on our current contracts and charters. A decline in the amount of services requested by our customers or their default on our contracts with them could have a material adverse effect on our business, financial condition and results of operations.

Our primary economic environment is the international shipping market, which utilizes the U.S. Dollar as its functional currency. Consequently, virtually all of our revenues and the majority of our expenses are in U.S. Dollars. However, we incur certain voyage expenses, vessel operating expenses, and general and administrative expenses in foreign currencies, the most significant of which are the Euro, Singapore Dollar, British Pound, Euro and Canadian Dollar and British Pound.Dollar. This partial mismatch in revenues and expenses could lead to fluctuations in our net income due to changes in the value of the U.S. Dollar relative to other currencies.

One of our principal strategies is to continue to grow by expanding our operations and adding vessels to our fleet. Our future growth will depend upon a number of factors, some of which are beyond our control. These factors include our ability to:

In addition, competition from other companies, many of which have significantly greater financial resources than do we or Teekay Corporation, may reduce our acquisition opportunities or cause us to pay higher prices. Our failure to effectively identify, purchase, develop and integrate any tankers or businesses could adversely affect our business, financial condition and results of operations.

To the extent we acquire existing vessels, they typically do not carry warranties as to their condition, unlike newbuilding vessels. While we generally inspect existing vessels prior to purchase, such an inspection would normally not provide us with as much knowledge of a vessel’s condition as we would possess if it had been built for us and operated by us during its life. Repairs and maintenance costs for existing vessels are difficult to predict and may be substantially higher than for vessels we have operated since they were built. These costs could decrease our cash flows and liquidity, and harm our financial condition and performance.

Vessel values for oil tankers can fluctuate substantially over time due to a number of different factors. Vessel values may decline from existing levels. If the operation of a tanker is not profitable, or if we cannot re-deploy a chartered tanker at attractive rates upon charter termination, rather than continue to incur costs to maintain and finance the vessel, we may seek to dispose of it. Our inability to dispose of the vessel at a fair market value or the disposition of the vessel at a fair market value that is lower than its book value could result in a loss on its sale and adversely affect our results of operations and financial condition. As of December 31, 2017, three2018, two of our credit facilities and four14 of our obligations related to capital leases contain loan-to-value financial covenants tied to the value of the vessels that collateralize these credit facilities and the vessels related to the capital leases. A significant decline in the market value of these tankers may require us to pledge additional collateral to avoid a default under these credit facilities and obligations related to capital leases. We are required to maintain vessel value to outstanding loan principal balance ratios ranging from 90%75%-125%. At December 31, 2017,2018, we were in compliance with these requirements. A significant decline in the market value of our tankers may prevent us from refinancing tankers with a similar amount of debt thereby requiring us to either reduce debt levels in facilities collateralized by the tankers or seek alternative financing structures.

In addition, if we determine at any time that a vessel’s future useful life and earnings require us to impair its value on our consolidated financial statements, we may need to recognize a significant charge against our earnings.

We will be required to make substantial capital expenditures should we decide to increase the size of our fleet. We intend to expand our fleet, byincluding acquiring tankers primarily from third parties. Our acquisitions may also include newbuildings. We generally will be required to make installment payments on any newbuildings prior to their delivery. We typically pay 10% to 20% of the purchase price of a tanker upon signing the purchase contract, even though delivery of the completed vessel does not occur until much later (approximately two to three years from the order). To fund expansion capital expenditures, we may be required to use cash balances or cash from operations, incur borrowings or raise capital through the incurrence of debt or issuance of additional equity securities. Our ability to obtain bank financing or to access the capital markets for future offerings may be limited by our financial condition at the time of any such financing or offering, as well as by adverse market conditions resulting from, among other things, general economic conditions and contingencies and uncertainties that are beyond our control. Our failure to obtain funds for capital expenditures could have a material adverse effect on our business, results of operations and financial condition. Even if we are successful in obtaining the necessary funds, incurring additional debt may significantly increase our interest expense and financial leverage, which could limit our financial flexibility and ability to pursue other business opportunities. In addition, issuing additional equity securities may result in significant shareholder ownership dilution and would increase the aggregate amount of cash required to pay quarterly dividends.

The operating and financial restrictions and covenants in our revolving credit facilities, term loans, lease obligations and in any of our future financing agreements could adversely affect our ability to finance future operations or capital needs or to pursue and expand our business activities. For example, these financing arrangements may restrict our ability to:

In addition, certain of our debt agreements require, us to comply with certain financial covenants. Our ability to comply with covenants and restrictions contained in debt instruments and lease obligations may be affected by events beyond our control, including prevailing economic, financial and industry conditions. If market or other economic conditions deteriorate, we may fail to comply with these covenants. In addition, two of our term loans are guaranteed by Teekay and contain certain financial covenants. Teekay's ability to comply with the covenants of these term loans will affect our compliance with the covenants. If we breach any of the restrictions, covenants, ratios or tests in theour financing agreements or indentures, our obligations may become immediately

Because we are organized under the laws of the Marshall Islands, it may be difficult to serve us with legal process or triggerenforce judgments against us, our directors or our management.

We are a Marshall Islands corporation with our headquarters in Bermuda. A majority of our subsidiaries are Marshall Islands entities and many of our subsidiaries are either organized or registered in Bermuda. It is difficult to determine how the EU blacklisting of these jurisdictions will affect our business. These jurisdictions have enacted or may enact economic substance laws and regulations with which we may be obligated to comply. We understand that recently-adopted Bermudian legislation requires each Bermudian registered entity to maintain a substantial economic presence in Bermuda and provides that a registered entity that carries on a relevant activity may comply with the economic substance requirements if (i) it is directed and managed in Bermuda, (ii) its core income-generating activities are undertaken in Bermuda with respect to the relevant activity, (iii) it maintains adequate physical presence in Bermuda, (iv) it has adequate full-time employees in Bermuda with suitable qualifications, and (v) it incurs adequate operating expenditures in Bermuda in relation to the relevant activity. We do not know what actions the Marshall Islands may take, if any, to remove itself from the list; whether the EU will remove the Marshall Islands or Bermuda from the list; how quickly the EU would react to any changes in legislation of the Marshall Islands, Bermuda or other applicable jurisdictions; or how EU banks or other counterparties will react while we or any of our subsidiaries remain as entities organized and existing or registered under other financing agreements.the laws of blacklisted countries. The effect of the EU blacklist, and any noncompliance by us with any legislation adopted by applicable countries to achieve removal from the list, could have a material adverse effect on our business, financial condition and operating results.

As of December 31, 2017,2018, our long-term debt was approximately $963.2$742.0 million and an additional $88.6$11.8 million was available to us under our revolving credit facilities.facilities, and our obligations related to capital leases was approximately $375.3 million. In addition, in late 2018, one of our subsidiaries entered into a working capital loan facility, which provides up to $40 million of available aggregate borrowings with the option to increase the facility up to an additional $15.0 million. As at December 31, 2018, no amounts had been drawn under this facility. We will continue to have the ability to incur additional debt, subject to limitations in our revolving credit facilities.facilities and working capital loan facility. Our level of debt could have important consequences to us, including the following:

Our ability to service our debt and obligations related to capital leases depends upon, among other things, our financial and operating performance, which is affected by prevailing economic conditions and financial, business, regulatory and other factors, many of which are beyond our control. If our operating results are not sufficient to service our current or future indebtedness and obligations related to capital leases, we will be forced to take actions such as reducing or delaying our business activities, acquisitions, investments or capital expenditures, selling assets, restructuring or refinancing our debt, or seeking additional equity capital or bankruptcy protection. We may not be able to effect any of these remedies on satisfactory terms, or at all.

The operation of oil tankers and lightering support vessels isand the transfer of oil and gas are inherently risky. Although we carry hull and machinery (marine and war risks) and protection and indemnity insurance, all risks may not be adequately insured against, and any particular claim may not be paid. In addition, we do not carry insurance on our vessels covering the loss of revenues resulting from vessel off-hire time, based on its cost compared to our off-hire experience.time. Any significant unpaid claims or off-hire time of our vessels could harm our business, operating results and financial condition. Any claims covered by insurance would be subject to deductibles, and since it is possible that a large number of claims may be brought, the aggregate amount of these deductibles could be material. Certain of our insurance coverage is maintained through mutual protection and indemnity associations, and as a member of such associations we may be required to make additional payments over and above budgeted premiums if member claims exceed association reserves.

We may be unable to procure adequate insurance coverage at commercially reasonable rates in the future. For example, more stringent environmental regulations have led to increased costs for, and in the future may result in the lack of availability of, insurance against risks of environmental damage or pollution. A catastrophic oil spill, marine disasters or natural disasters could exceed the insurance coverage, which could harm our business, financial condition and operating results. Any uninsured or underinsured loss could harm our business and financial condition. In addition, the insurance may be voidable by the insurers as a result of certain actions, such as vessels failing to maintain certification with applicable maritime regulatory organizations.

Changes in the insurance markets attributable to terrorist attacks may also make certain types of insurance more difficult to obtain. In addition, the insurance that may be available may be significantly more expensive than existing coverage.

Terrorist attacks, piracy and the current or future conflicts in the Middle East, South East Asia, West Africa (Nigeria), Libya and elsewhere, and other current and future conflicts and political change, may adversely affect our business, operating results, financial condition, and ability to raise capital and fund future growth. Continuing hostilities in the Middle East especially among Qatar, Saudi Arabia, the United Arab Emirates, Yemen and elsewhere may lead to additional armed conflicts or to further acts of terrorism and civil disturbance in the United States or elsewhere, which may contribute further to economic instability and disruption of oil production and distribution, which could result in reduced demand for our services and have an adverse impact on our operations and our ability to conduct business.

In addition, oil facilities, shipyards, vessels, pipelines, oil fields or other infrastructure could be targets of future terrorist attacks or warlike operations and our vessels could be targets of pirates, hijackers, terrorists or warlike operations. Any such attacks could lead to, among other things, bodily injury or loss of life, vessel or other property damage, increased vessel operational costs, including insurance costs, and the inability to transport oil to or from certain locations. Terrorist attacks, war, piracy, hijacking or other events beyond our control that adversely affect the distribution, production or transportation of oil to be shipped by us could entitle customers to terminate charters which would harm our cash flow and business.

Because our operations and the operations of our customers are primarily conducted outside of the United States, they may be affected by economic, political and governmental conditions in the countries where we engage in business or where our vessels are registered. Any disruption caused by these factors could harm our business, including by reducing the levels of oil exploration, development and production activities in these areas. We derive some of our revenues from shipping oil from politically unstable regions. Conflicts in these regions have

included attacks on ships and other efforts to disrupt shipping. Hostilities or other political instability in regions where we operate or where we may operate could have a material adverse effect on the growth of our business, results of operations and financial condition and ability to make cash distributions.pay dividends. In addition, tariffs, trade embargoes and other economic sanctions by the United States or other countries to which we trade may limit trading activities with those countries, which could also harm our business and ability to make cash distributions.pay dividends. Finally, a government could requisition one or more of our vessels, which is most likely during war or national emergency. Any such requisition would cause a loss of the vessel and could harm our cash flows and financial results.

We rely on information technology systems and networks in our operations and the administration of our business. Cyber-attacks have increased in number and sophistication in recent years. Our operations could be targeted by individuals or groups seeking to sabotage or disrupt our information technology systems and networks, or to steal data. A successful cyber-attack could materially disrupt our operations, including the safety of our operations, or lead to unauthorized release of information or alteration of information on our systems. Any such attack or other breach of our information technology systems could have a material adverse effect on our business and results of operations.

Any of these events could have a material adverse effect on our business, financial condition and operating results. In addition, any damage to, or environmental contamination involving, oil production facilities serviced by our vessels could result in the suspension or curtailment of operations by our customer, which would in turn result in loss of revenues.

Our operations are affected by extensive and changing international, national and local environmental protection laws, regulations, treaties and conventions in force in international waters, the jurisdictional waters of the countries in which our vessels operate, as well as the countries of our vessels’ registration, including those governing oil spills, discharges to air and water, and the handling and disposal of hazardous substances and wastes. Many of these requirements are designed to reduce the risk of oil spills and other pollution. In addition, we believe that the heightened environmental, quality and security concerns of insurance underwriters, regulators and charterers will lead to additional regulatory requirements, including enhanced risk assessment and security requirements and greater inspection and safety requirements on vessels. We expect to incur substantial expenses in complying with these laws and regulations, including expenses for vessel modifications and changes in operating procedures.

These requirements may affect the resale value or useful lives of our vessels, require a reduction in cargo capacity, ship modifications or operational changes or restrictions, lead to decreased availability of insurance coverage for environmental matters or result in the denial of access to certain jurisdictional waters or ports, or detention in, certain ports. Under local, national and foreign laws, as well as international treaties and conventions, we could incur material liabilities, including cleanup obligations, in the event that there is a release of petroleum or other hazardous substances from our vessels or otherwise in connection with our operations. We could also become subject to personal injury or property damage claims relating to the release of or exposure to hazardous materials associated with our operations. In addition, failure to comply with applicable laws and regulations may result in administrative and civil penalties, criminal sanctions or the suspension or termination of our operations, including, in certain instances, seizure or detention of our vessels. For further information about regulations affecting our business and related requirements on us, please read Item 4 – Information on the Company: B. Business Overview – Regulations.

Due to concern over the risk of climate change, a number of countries have adopted, or are considering the adoption of, regulatory frameworks to reduce greenhouse gas emissions. These regulatory measures include, among others, adoption of cap and trade regimes, carbon taxes, increased efficiency standards, and incentives or mandates for renewable energy. Compliance with changes in laws, regulations and obligations relating to climate change could increase our costs related to operating and maintaining our vessels and require us to install new emission controls, acquire allowances or pay taxes related to our greenhouse gas emissions, or administer and manage a greenhouse gas emissions program. Our revenue generation and strategic growth opportunities may also be adversely affected.

Adverse effects upon the oil industry relating to climate change may also adversely affect demand for our services. Although we do not expect that demand for oil will lessen dramatically over the short-term,short term, in the long-term,long term, climate change may reduce the demand for oil or increased regulation of greenhouse gases may create greater incentives for use of alternative energy sources. Any long-term material adverse effect on the oil industry could have a significant financial and operational adverse impact on our business that we cannot predict with certainty at this time.

Crew members, suppliers of goods and services to a vessel, shippers of cargo and other parties may be entitled to a maritime lien against that vessel for unsatisfied debts, claims or damages. In many jurisdictions, a maritime lienholder may enforce its lien by arresting a vessel through foreclosure proceedings. The arrest or attachment of one or more of our vessels could interrupt our cash flow and require us to pay large sums of funds to have the arrest or attachment lifted. In addition, in some jurisdictions, such as South Africa, under the “sister ship” theory of liability, a claimant may arrest both the vessel that is subject to the claimant’s maritime lien and any “associated” vessel, which is any vessel owned or controlled by the same owner. Claimants could try to assert “sister ship” liability against one vessel in our fleet or the

Pursuant to the terms of the Management Agreement, our Manager provides to us commercial, technical, administrative and strategic services, including vessel maintenance, crewing, purchasing, shipyard supervision, insurance and financial services. Our Manager then subcontracts the commercial management and technical managementvarious services to TTOL, our wholly-owned subsidiary.us. Our operational success and ability to execute our growth strategy depend significantly upon the satisfactory performance of these services by our Manager. Our business willmay be

harmed if our Manager fails to perform these services satisfactorily, if it stops providing these services to us or if it terminates the Management Agreement, as it is entitled to do under certain circumstances. The circumstances under which we are able to terminate the Management Agreement are limited and do not include mere dissatisfaction with our Manager’s performance. In addition, upon any termination of the Management Agreement, we may lose our ability to benefit from economies of scale in purchasing supplies and other advantages that we believe our relationship with Teekay Corporation provides. Furthermore, the profitable operation of our tankers that participate in tanker pooling arrangements depends largely on the efforts of the pool managers and Teekay Corporation’s reputation and relationships in the shipping industry. Under the pooling arrangements, the earnings and voyage expenses of all of the vessels in pools are aggregated, or pooled, and divided according to an agreed formula. If Teekay Corporation suffers material damage to its reputation or relationships, it may harm our ability to:

If our ability to do any of the things described above is impaired, it could have a material adverse effect on our business, results of operations and financial condition.

Our success depends in large part on Teekay Corporation’s ability to attract and retain highly skilled and qualified personnel. In crewing our vessels, we require technically skilled employees with specialized training who can perform physically demanding work. Competition to attract and retain qualified crew members is intense. The shipping industry continues to forecast a shortfall in qualified personnel, and crew or other compensation may increase in the future. If crew costs increase and we are not able to increase our rates to compensate for any such increases, our financial condition and results of operations may be adversely affected. Any inability we experience in the future to hire, train and retain a sufficient number of qualified employees or crew could impair our ability to manage, maintain and grow our business.

Our Class B common stock has five votes per share, and our Class A common stock has one vote per share. However, the voting power of the Class B common stock is limited such that the aggregate voting power of all shares of outstanding Class B common stock can at no time exceed 49% of the voting power of our outstanding Class A common stock and Class B common stock, voting together as a single class. As of the date of this Annual Report, Teekay Corporation indirectly owns shares of Class A and Class B common stock representing a majority of the voting power of our outstanding capital stock. Through its ownership of all of our Class B common stock and of our Manager and other entities that provide services to us, Teekay Corporation has substantial control and influence over our management and affairs and over all matters requiring shareholder approval, including the election of directors and significant corporate transactions. In addition, because of this dual-class common stock structure, Teekay Corporation will continue to be able to control matters submitted to our shareholders for approval even though it owns significantly less than 50% of the outstanding shares of our common stock. This voting control limits our remaining Class A common shareholders’ ability to influence corporate matters and, as a result, we may take actions that our Class A common shareholders do not view as beneficial.

Our Management Agreement has an initial term through December 31, 2022 and will automatically renew for subsequent five-year terms provided that certain conditions are met. Our Manager has the right to terminate the Management Agreement with 12 months’ notice. Our Manager also has the right to terminate the Management Agreement after a dispute resolution process if we have materially breached the Management Agreement. The Management Agreement will terminate upon the sale of all or substantially all of our assets to a third party, our

In addition, our rights to terminate the Management Agreement are limited. Even if we are not satisfied with the Manager’s efforts in managing our business, unless our Manager materially breaches the agreement or experiences certain bankruptcy or change of control events, we have only a limited right to terminate the agreement after 10 years, effective December 31, 2017, and may not be able to terminate the agreement until December 31, 2022, the end of the initial 15-year term. If we elect to terminate the Management Agreement at eitherthe end of these pointsthe initial term or at the end of any subsequent renewal term, our Manager will receive a termination fee, which may be substantial.

A significant portion of Teekay Corporation’s seafarers that crew our vessels are employed under collective bargaining agreements. Teekay Corporation may become subject to additional labor agreements in the future. Teekay Corporation may suffer labor disruptions if relationships deteriorate with the seafarers or the unions that represent them. The collective bargaining agreements may not prevent labor disruptions, particularly when the agreements are being renegotiated. Salaries are typically renegotiated annually or biannually for seafarers. Although these negotiations have not caused labor disruptions in the past, any labor disruptions could harm our operations and could have a material adverse effect on our business, results of operations and financial condition.

Conflicts of interest may arise between Teekay Corporation our Manager and theirits other affiliates, on the one hand, and us and our shareholders, on the other hand. As a result of these conflicts, Teekay Corporation or our Manager may favor theirits own interests and the interests of theirits other affiliates over our interests and those of our shareholders. These conflicts include, among others, the following situations:

Our officers and directors have fiduciary duties to manage our business in a manner beneficial to us and our shareholders. However, our Chief Executive Officer and our Chief Financial Officer and threefour of our current directors or nominees for election as directors at our 2019 annual meeting of shareholders also serve as executive officers or directors of Teekay Corporation, and/or executive officers of our Manager, and as a result, have fiduciary duties to manage the business of Teekay Corporation and its affiliates in a manner beneficial to such entities and their shareholders or partners, as the case may be. Consequently, these officers and directordirectors may encounter situations in which their fiduciary obligations to Teekay Corporation or our Manager or theirits affiliates, on the one hand, and us, on the other hand, are in conflict. The resolution of these conflicts may not always be in our best interest or that of our shareholders.

Our U.S. Gulf lightering business faces competition from alternative methods of delivering crude oil shipments to port, including offshore offloading facilities. While we believe that lightering offers advantages over alternative methods of delivering crude oil to U.S. Gulf ports, our lightering revenues may be limited due to the availability of alternative methods.

Lightering is subject to specific risks arising from the process of safely bringing two large moving tankers next to each other and mooring them for lightering operations, in which oil, refined petroleum products or other cargoes are transferred from one ship to the other. These operations require a high degree of expertise and present a higher risk of collision or spill compared to when docking a vessel or transferring cargo at port. Lightering operations, similar to marine transportation in general, are also subject to risks due to events such as mechanical failures, human error, and weather conditions.

In addition to the following risk factors, you should read Item 4E – Information on the Company – Taxation of the Company, Item 10 - Additional Information – Material U.S. Federal Income Tax Considerations and Item 10 - Additional Information – Non-United States Tax Considerations for a more complete discussion of the expected material U.S. federal and non-U.S. income tax considerations relating to us and the ownership and disposition of our Class A common stock.

If the IRS were to determine that we are or have been a PFIC for any taxable year during which a U.S. Holder (as defined below under “Item 10 – Additional Information – Material U.S. Federal Income Tax Considerations”) held our stock, such U.S. Holder would face adverse tax consequences. For a more comprehensive discussion regarding the tax consequences to U.S. Holders if we are treated as a PFIC, please read Item 10 - Additional Information-Material U.S. Federal Income Tax Considerations-United States Federal Income Taxation of U.S. Holders-Consequences of Possible PFIC Classification.

We or our subsidiaries are subject to tax in certain jurisdictions in which we or our subsidiaries are organized own assets or have operations, which reduces our operating results. In computing our tax obligations in these jurisdictions, we are required to take various tax accounting and reporting positions on matters that are not entirely free from doubt and for which we have not received rulings from the governing authorities. We cannot assure you that upon review of these positions the applicable authorities will agree with our positions. A successful challenge by a tax authority could result in additional tax imposed on us or our subsidiaries, further reducing our operating results. In addition, changes in our operations or ownership could result in additional tax being imposed on us or on our subsidiaries in jurisdictions in which operations are conducted. For example, if Teekay Tankers Ltd. was not able to satisfy the requirements of the exemption from U.S. taxation under Section 883 of the Code, we would be subject to U.S. federal income tax on shipping income attributable to our transportation of cargoes to or from the United Sates,States, the amount of which is not within our complete control. Also, jurisdictions in which we or our subsidiaries are organized, own assets or have operations may change their tax laws, or we may enter into new business transactions relating to such jurisdictions, which could result in increased tax liability and reduce our operating results. Please read Item 4 - Information on the Company—Taxation of the Company.

Teekay Tankers Ltd. (“we,” “us,” or “the Company”) is an international provider of marine transportation to global oil industries. We were formed as a Marshall Islands corporation in October 2007 by Teekay Corporation (NYSE: TK), a leading provider of marine services to the global oil and natural gas industries. We completed our initial public offering on December 18, 2007 with an initial fleet of nine Aframax oil tankers which were transferred to us by Teekay Corporation.

In November 2017, we completed a merger with TIL by acquiring all of the remaining 27.0 million issued and outstanding common shares of TIL, by way of a share-for-share exchange resulting in TIL becoming a wholly-owned subsidiary. At the time of the merger, TIL owned a modern fleet of 10ten Suezmax tankers, six Aframax tankers and two LR2 product tankers. Please read Item 18 - Financial Statements: Note 2223 - Acquisition of Tanker Investments Ltd.

From time to time, we also charter-in vessels, typically from third parties as part of our chartering strategy. Please read “Business Strategies” below in this Item. Most of our acquisitions were financed by a combination of utilizing the net proceeds from public equity offerings or private placements, as well as raising new debt, the assumption of existing debt, drawing on our revolving credit facility, and using our available working capital.

We incorporated on October 17, 2007 under the laws of the Republic of The Marshall Islands as Teekay Tankers Ltd. and maintain our principal executive offices at 4th Floor, Belvedere Building, 69 Pitts Bay Road, Hamilton, HM 08, Bermuda. Our telephone number at such address is (441) 298-2530.

Our primary business is to own oil and product tankers and we employ a chartering strategy that seeks to capture upside opportunities in the tanker spot market while using fixed-rate time charters to reduce downside risks. During 2015, we expanded our service offerings to our customers through the purchase of aour ship-to-ship transfer business that provides full service lightering as well as lightering support services and consultancy and LNG terminal management services. This acquisition, which is adjacent to our core competencies, along with our existing conventional tanker commercial management and technical management operations, is expected to improve our ability to manage the cyclicality of the tanker market through the less volatile cash flows generated by these business areas. Historically, the tanker industry has experienced volatility in profitability due to changes in the supply of, and demand for, tanker capacity. Tanker supply and demand are each influenced by several factors beyond our control.

Teekay Corporation, which formed us in 2007, is a leading provider of marine services to the global oil and natural gas industries, and together with its subsidiaries, is one of the world’s largest operator of medium-sized oil tankers. We believe we benefit from Teekay Corporation’s expertise, relationships and reputation as we operate our fleet and pursue growth opportunities. We have acquired a portion of our current operating fleet from Teekay Corporation at various times since our inception, and we anticipate additional opportunities to expand our fleet through acquisitions of tankers from third parties. In addition, Teekay Corporation’s day-to-day focus on cost control is applied to our operations. Teekay Corporation and two other shipping companies participate in a purchasing alliance, Teekay Bergesen Worldwide, which leverages

the purchasing power of the combined fleets, mainly in such commodity areas as lube oils, paints and other chemicals. Through our Manager, we benefit from this purchasing alliance.

The following table summarizes our fleet as at December 31, 2017:2018:

The following table provides additional information about our owned Aframax-classand leased Suezmax oil tankers as of December 31, 2017,2018, all of which are Bahamian flagged.Bahamian-flagged.