____________________________________

____________________________________ 

(Mark One)

For the fiscal year ended December 31, 2013

or

For the transition period from            to             .

Commission File No. 000-22513

____________________________________

(Exact Name of Registrant as Specified in its Charter)

410 Terry Avenue North

Seattle, Washington 98109-5210

(206) 266-1000

(Address and telephone number, including area code, of registrant's principal executive offices)

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act:

None

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Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes   x     No   ¨

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Exchange Act.    Yes   ¨     No   x

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes   x     No   ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes   x     No   ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.   x

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See definitions of "large accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act.

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes   ¨     No   x

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DOCUMENTS INCORPORATED BY REFERENCE

The information required by Part III of this Report, to the extent not set forth herein, is incorporated herein by reference from the registrant's definitive proxy statement relating to the Annual Meeting of Shareholders to be held in 2014, which definitive proxy statement shall be filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year to which this Report relates.

AMAZON.COM, INC.

FORM 10-K

For the Fiscal Year Ended December 31, 2013

INDEX

AMAZON.COM, INC.

PART I

This Annual Report on Form 10-K and the documents incorporated herein by reference contain forward-looking statements based on expectations, estimates, and projections as of the date of this filing. Actual results may differ materially from those expressed in forward-looking statements. See Item 1A of Part I-"Risk Factors."

Amazon.com, Inc. was incorporated in 1994 in the state of Washington and reincorporated in 1996 in the state of Delaware. Our principal corporate offices are located in Seattle, Washington. We completed our initial public offering in May 1997 and our common stock is listed on the Nasdaq Global Select Market under the symbol "AMZN."

As used herein, "Amazon.com," "we," "our," and similar terms include Amazon.com, Inc. and its subsidiaries, unless the context indicates otherwise.

General

Amazon.com opened its virtual doors on the World Wide Web in July 1995. We seek to be Earth's most customer-centric company. In each of our two geographic segments, we serve our primary customer sets, consisting of consumers, sellers, enterprises, and content creators. In addition, we provide services, such as advertising services and co-branded credit card agreements.

We manage our business primarily on a geographic basis. Accordingly, we have organized our operations into two segments: North America and International. While each reportable operating segment provides similar products and services, a majority of our technology costs are incurred in the U.S. and allocated to our North America segment. Additional information on our operating segments and product information is contained in Item 8 of Part II, "Financial Statements and Supplementary Data-Note 12-Segment Information." See Item 7 of Part II, "Management's Discussion and Analysis of Financial Condition and Results of Operations-Results of Operations-Supplemental Information" for supplemental information about our net sales.

Consumers

We serve consumers through our retail websites and focus on selection, price, and convenience. We design our websites to enable millions of unique products to be sold by us and by third parties across dozens of product categories. Customers access our websites directly and through our mobile websites and apps. We also manufacture and sell electronic devices. We strive to offer our customers the lowest prices possible through low everyday product pricing and shipping offers, and to improve our operating efficiencies so that we can continue to lower prices for our customers. We also provide easy-to-use functionality, fast and reliable fulfillment, and timely customer service. In addition, we offer Amazon Prime, an annual membership program that includes unlimited free shipping on millions of items, access to unlimited instant streaming of thousands of movies and TV episodes, and access to hundreds of thousands of books to borrow and read for free on a Kindle device.

We fulfill customer orders in a number of ways, including through the North America and International fulfillment centers and warehouses that we operate, through co-sourced and outsourced arrangements in certain countries, and through digital delivery. We operate customer service centers globally, which are supplemented by co-sourced arrangements. See Item 2 of Part I, "Properties."

Sellers

We offer programs that enable sellers to sell their products on our websites and their own branded websites and to fulfill orders through us. We are not the seller of record in these transactions, but instead earn fixed fees, revenue share fees, per-unit activity fees, or some combination thereof.

Enterprises

We serve developers and enterprises of all sizes through Amazon Web Services ("AWS"), which provides technology infrastructure services that enable virtually any type of business.

Content Creators

We serve authors and independent publishers with Kindle Direct Publishing, an online platform that lets independent authors and publishers choose a 70% royalty option and make their books available in the Kindle Store, along with Amazon's own publishing arm, Amazon Publishing. We also offer programs that allow authors, musicians, filmmakers, app developers, and others to publish and sell content.

Competition

Our businesses are rapidly evolving and intensely competitive. Our current and potential competitors include: (1) physical-world retailers, publishers, vendors, distributors, manufacturers, and producers of our products; (2) other online e-commerce and mobile e-commerce sites, including sites that sell or distribute digital content; (3) media companies, web portals, comparison shopping websites, and web search engines, either directly or in collaboration with other retailers; (4) companies that provide e-commerce services, including website development, fulfillment, customer service, and payment processing; (5) companies that provide information storage or computing services or products, including infrastructure and other web services; and (6) companies that design, manufacture, market, or sell consumer electronics, telecommunication, and electronic devices. We believe that the principal competitive factors in our retail businesses include selection, price, and convenience, including fast and reliable fulfillment. Additional competitive factors for our seller and enterprise services include the quality, speed, and reliability of our services and tools. Many of our current and potential competitors have greater resources, longer histories, more customers, and greater brand recognition. They may secure better terms from suppliers, adopt more aggressive pricing, and devote more resources to technology, infrastructure, fulfillment, and marketing. Other companies also may enter into business combinations or alliances that strengthen their competitive positions.

Intellectual Property

We regard our trademarks, service marks, copyrights, patents, domain names, trade dress, trade secrets, proprietary technologies, and similar intellectual property as critical to our success, and we rely on trademark, copyright, and patent law, trade-secret protection, and confidentiality and/or license agreements with our employees, customers, partners, and others to protect our proprietary rights. We have registered, or applied for the registration of, a number of U.S. and international domain names, trademarks, service marks, and copyrights. Additionally, we have filed U.S. and international patent applications covering certain of our proprietary technology. We have licensed in the past, and expect that we may license in the future, certain of our proprietary rights to third parties.

Seasonality

Our business is affected by seasonality, which historically has resulted in higher sales volume during our fourth quarter, which ends December 31. We recognized 34% , 35%, and 36% of our annual revenue during the fourth quarter of 2013 , 2012 , and 2011 .

Employees

We employed approximately 117,300 full-time and part-time employees as of December 31, 2013 . However, employment levels fluctuate due to seasonal factors affecting our business. Additionally, we utilize independent contractors and temporary personnel to supplement our workforce. We have works councils and statutory employee representation obligations in certain countries. Except where required by law, unions are not the collective bargaining representatives of our employees in any facility with more than five employees. We consider our employee relations to be good. Competition for qualified personnel in our industry has historically been intense, particularly for software engineers, computer scientists, and other technical staff.

Available Information

Our investor relations website is www.amazon.com/ir and we encourage investors to use it as a way of easily finding information about us. We promptly make available on this website, free of charge, the reports that we file or furnish with the Securities and Exchange Commission ("SEC"), corporate governance information (including our Code of Business Conduct and Ethics), and select press releases and social media postings.

Executive Officers and Directors

The following tables set forth certain information regarding our Executive Officers and Directors as of January 17, 2014 :

Executive Officers

Jeffrey P. Bezos.  Mr. Bezos has been Chairman of the Board of Amazon.com since founding it in 1994 and Chief Executive Officer since May 1996. Mr. Bezos served as President of the Company from founding until June 1999 and again from October 2000 to the present.

Jeffrey M. Blackburn.  Mr. Blackburn has served as Senior Vice President, Business Development, since April 2006.

Andrew R. Jassy.  Mr. Jassy has served as Senior Vice President, Web Services, since April 2006.

Diego Piacentini.  Mr. Piacentini has served as Senior Vice President, International Consumer Business, since February 2012, and as Senior Vice President, International Retail, from January 2007 until February 2012.

Shelley L. Reynolds.  Ms. Reynolds has served as Vice President, Worldwide Controller, and Principal Accounting Officer since April 2007.

Thomas J. Szkutak.  Mr. Szkutak has served as Senior Vice President and Chief Financial Officer since joining Amazon.com in October 2002.

H. Brian Valentine.  Mr. Valentine has served as Senior Vice President, Ecommerce Platform, since joining Amazon.com in September 2006.

Jeffrey A. Wilke.  Mr. Wilke has served as Senior Vice President, Consumer Business, since February 2012, and as Senior Vice President, North America Retail, from January 2007 until February 2012.

David A. Zapolsky.  Mr. Zapolsky has served as Vice President, General Counsel, and Secretary since September 2012, and as Vice President and Associate General Counsel for Litigation and Regulatory matters from April 2002 until September 2012.

Board of Directors

Please carefully consider the following risk factors. If any of the following risks occur, our business, financial condition, operating results, and cash flows could be materially adversely affected. In addition, the current global economic climate amplifies many of these risks.

We Face Intense Competition

Our businesses are rapidly evolving and intensely competitive, and we have many competitors in different industries, including retail, e-commerce services, digital content and electronic devices, and web and infrastructure computing services. Some of our current and potential competitors have greater resources, longer histories, more customers, and/or greater brand recognition. They may secure better terms from vendors, adopt more aggressive pricing, and devote more resources to technology, infrastructure, fulfillment, and marketing.

Competition may intensify as our competitors enter into business combinations or alliances and established companies in other market segments expand to become competitive with our business. In addition, new and enhanced technologies, including search, web and infrastructure computing services, digital content, and electronic devices, may increase our competition. The Internet facilitates competitive entry and comparison shopping, and increased competition may reduce our sales and profits.

Our Expansion Places a Significant Strain on our Management, Operational, Financial, and Other Resources

We are rapidly and significantly expanding our global operations, including increasing our product and service offerings and scaling our infrastructure to support our retail and services businesses. This expansion increases the complexity of our business and places significant strain on our management, personnel, operations, systems, technical performance, financial resources, and internal financial control and reporting functions. We may not be able to manage growth effectively, which could damage our reputation, limit our growth, and negatively affect our operating results.

Our Expansion into New Products, Services, Technologies, and Geographic Regions Subjects Us to Additional Business, Legal, Financial, and Competitive Risks

We may have limited or no experience in our newer market segments, and our customers may not adopt our new offerings. These offerings may present new and difficult technology challenges, and we may be subject to claims if customers of these offerings experience service disruptions or failures or other quality issues. In addition, profitability, if any, in our newer activities may be lower than in our older activities, and we may not be successful enough in these newer activities to recoup our investments in them. If any of this were to occur, it could damage our reputation, limit our growth, and negatively affect our operating results.

We May Experience Significant Fluctuations in Our Operating Results and Growth Rate

We may not be able to accurately forecast our growth rate. We base our expense levels and investment plans on sales estimates. A significant portion of our expenses and investments is fixed, and we may not be able to adjust our spending quickly enough if our sales are less than expected.

Our revenue growth may not be sustainable, and our percentage growth rates may decrease. Our revenue and operating profit growth depends on the continued growth of demand for the products and services offered by us or our sellers, and our business is affected by general economic and business conditions worldwide. A softening of demand, whether caused by changes in customer preferences or a weakening of the U.S. or global economies, may result in decreased revenue or growth.

Our sales and operating results will also fluctuate for many other reasons, including due to risks described elsewhere in this section and the following:

We May Not Be Successful in Our Efforts to Expand into International Market Segments

Our international activities are significant to our revenues and profits, and we plan to further expand internationally. In certain international market segments, we have relatively little operating experience and may not benefit from any first-to-market advantages or otherwise succeed. It is costly to establish, develop, and maintain international operations and websites, and promote our brand internationally. Our international operations may not be profitable on a sustained basis.

In addition to risks described elsewhere in this section, our international sales and operations are subject to a number of risks, including:

As international e-commerce and other online and web services grow, competition will intensify. Local companies may have a substantial competitive advantage because of their greater understanding of, and focus on, the local customer, as well as their more established local brand names. We may not be able to hire, train, retain, and manage required personnel, which may limit our international growth.

The People's Republic of China ("PRC") regulates Amazon's and its affiliates' businesses and operations in the PRC through regulations and license requirements restricting (i) foreign investment in the Internet, IT infrastructure, retail, delivery, and other sectors, (ii) Internet content, and (iii) the sale of media and other products and services. For example, in order to meet local ownership and regulatory licensing requirements, www.amazon.cn is operated by PRC companies that are indirectly owned, either wholly or partially, by PRC nationals. Although we believe these structures comply with existing PRC laws, they involve unique risks. There are substantial uncertainties regarding the interpretation of PRC laws and regulations, and it is possible that the PRC government will ultimately take a view contrary to ours. If our Chinese business interests were found to be in violation of any existing or future PRC laws or regulations or if interpretations of those laws and regulations were to change, the business could be subject to fines and other financial penalties, have licenses revoked, or be forced to shut down entirely. In addition, the Chinese businesses and operations may be unable to continue to operate if we or our affiliates are unable to access sufficient funding or enforce contractual relationships with respect to management and control of such businesses.

If We Do Not Successfully Optimize and Operate Our Fulfillment Centers, Our Business Could Be Harmed

If we do not adequately predict customer demand or otherwise optimize and operate our fulfillment centers successfully, it could result in excess or insufficient inventory or fulfillment capacity, result in increased costs, impairment charges, or both, or harm our business in other ways. A failure to optimize inventory will increase our net shipping cost by requiring long-zone or partial shipments. Orders from several of our websites are fulfilled primarily from a single location, and we have only a limited ability to reroute orders to third parties for drop-shipping. We and our co-sourcers may be unable to adequately staff our fulfillment and customer service centers. As we continue to add fulfillment and warehouse capability or add new businesses with different fulfillment requirements, our fulfillment network becomes increasingly complex and operating it becomes more challenging. If the other businesses on whose behalf we perform inventory fulfillment services deliver product to our fulfillment centers in excess of forecasts, we may be unable to secure sufficient storage space and may be unable to optimize our fulfillment centers. There can be no assurance that we will be able to operate our network effectively.

We rely on a limited number of shipping companies to deliver inventory to us and completed orders to our customers. If we are not able to negotiate acceptable terms with these companies or they experience performance problems or other difficulties, it could negatively impact our operating results and customer experience. In addition, our ability to receive inbound inventory efficiently and ship completed orders to customers also may be negatively affected by inclement weather, fire, flood, power loss, earthquakes, labor disputes, acts of war or terrorism, acts of God, and similar factors.

Third parties either drop-ship or otherwise fulfill an increasing portion of our customers' orders, and we are increasingly reliant on the reliability, quality, and future procurement of their services. Under some of our commercial agreements, we maintain the inventory of other companies, thereby increasing the complexity of tracking inventory and operating our fulfillment centers. Our failure to properly handle such inventory or the inability of these other companies to accurately forecast product demand would result in unexpected costs and other harm to our business and reputation.

The Seasonality of Our Business Places Increased Strain on Our Operations

We expect a disproportionate amount of our net sales to occur during our fourth quarter. If we do not stock or restock popular products in sufficient amounts such that we fail to meet customer demand, it could significantly affect our revenue and our future growth. If we overstock products, we may be required to take significant inventory markdowns or write-offs, which could reduce profitability. We may experience an increase in our net shipping cost due to complimentary upgrades, split-shipments, and additional long-zone shipments necessary to ensure timely delivery for the holiday season. If too many customers access our websites within a short period of time due to increased holiday demand, we may experience system interruptions that make our websites unavailable or prevent us from efficiently fulfilling orders, which may reduce the volume of goods we sell and the attractiveness of our products and services. In addition, we may be unable to adequately staff our fulfillment and customer service centers during these peak periods and delivery and other fulfillment companies and customer

service co-sourcers may be unable to meet the seasonal demand. We also face risks described elsewhere in this Item 1A relating to fulfillment center optimization and inventory.

We generally have payment terms with our retail vendors that extend beyond the amount of time necessary to collect proceeds from our consumer customers. As a result of holiday sales, as of December 31 of each year, our cash, cash equivalents, and marketable securities balances typically reach their highest level (other than as a result of cash flows provided by or used in investing and financing activities). This operating cycle results in a corresponding increase in accounts payable as of December 31. Our accounts payable balance generally declines during the first three months of the year, resulting in a corresponding decline in our cash, cash equivalents, and marketable securities balances.

Our Business Could Suffer if We Are Unsuccessful in Making, Integrating, and Maintaining Commercial Agreements, Strategic Alliances, and Other Business Relationships

We provide e-commerce and other services to businesses through commercial agreements, strategic alliances, and business relationships. Under these agreements, we provide web services, technology, fulfillment, computing, digital storage, and other services, as well as enable sellers to offer products or services through our websites. These arrangements are complex and require substantial infrastructure capacity, personnel, and other resource commitments, which may limit the amount of business we can service. We may not be able to implement, maintain, and develop the components of these commercial relationships, which may include web services, fulfillment, customer service, inventory management, tax collection, payment processing, hardware, content, and third-party software, and engaging third parties to perform services. The amount of compensation we receive under certain of our commercial agreements is partially dependent on the volume of the other company's sales. Therefore, if the other company's offering is not successful, the compensation we receive may be lower than expected or the agreement may be terminated. Moreover, we may not be able to enter into additional commercial relationships and strategic alliances on favorable terms. We also may be subject to claims from businesses to which we provide these services if we are unsuccessful in implementing, maintaining, or developing these services.

As our agreements terminate, we may be unable to renew or replace these agreements on comparable terms, or at all. We may in the future enter into amendments on less favorable terms or encounter parties that have difficulty meeting their contractual obligations to us, which could adversely affect our operating results.

Our present and future e-commerce services agreements, other commercial agreements, and strategic alliances create additional risks such as:

Our Business Could Suffer if We Are Unsuccessful in Making, Integrating, and Maintaining Acquisitions and Investments

We have acquired and invested in a number of companies, and we may acquire or invest in or enter into joint ventures with additional companies. These transactions create risks such as:

As a result of future acquisitions or mergers, we might need to issue additional equity securities, spend our cash, or incur debt, contingent liabilities, or amortization expenses related to intangible assets, any of which could reduce our profitability and harm our business. In addition, valuations supporting our acquisitions and strategic investments could change rapidly given the current global economic climate. We could determine that such valuations have experienced impairments or other-than-temporary declines in fair value which could adversely impact our financial results.

We Have Foreign Exchange Risk

The results of operations of, and certain of our intercompany balances associated with, our international websites and product and service offerings are exposed to foreign exchange rate fluctuations. Upon translation, operating results may differ materially from expectations, and we may record significant gains or losses on the remeasurement of intercompany balances. As we have expanded our international operations, our exposure to exchange rate fluctuations has increased. We also hold cash equivalents and/or marketable securities primarily in Euros, Japanese Yen, British Pounds, and Chinese Yuan. If the U.S. Dollar strengthens compared to these currencies, cash equivalents, and marketable securities balances, when translated, may be materially less than expected and vice versa.

The Loss of Key Senior Management Personnel Could Negatively Affect Our Business

We depend on our senior management and other key personnel, particularly Jeffrey P. Bezos, our President, CEO, and Chairman. We do not have "key person" life insurance policies. The loss of any of our executive officers or other key employees could harm our business.

We Could Be Harmed by Data Loss or Other Security Breaches

As a result of our services being web-based and the fact that we process, store, and transmit large amounts of data, including personal information, for our customers, failure to prevent or mitigate data loss or other security breaches, including breaches of our vendors' technology and systems, could expose us or our customers to a risk of loss or misuse of such information, adversely affect our operating results, result in litigation or potential liability for us, and otherwise harm our business. We use third party technology and systems for a variety of reasons, including, without limitation, encryption and authentication technology, employee email, content delivery to customers, back-office support, and other functions. Some subsidiaries had past security breaches, and, although they did not have a material adverse effect on our operating results, there can be no assurance of a similar result in the future. Although we have developed systems and processes that are designed to protect customer information and prevent data loss and other security breaches, including systems and processes designed to reduce the impact of a security breach at a third party vendor, such measures cannot provide absolute security.

We Face Risks Related to System Interruption and Lack of Redundancy

We experience occasional system interruptions and delays that make our websites and services unavailable or slow to respond and prevent us from efficiently fulfilling orders or providing services to third parties, which may reduce our net sales and the attractiveness of our products and services. If we are unable to continually add software and hardware, effectively upgrade our systems and network infrastructure, and take other steps to improve the efficiency of our systems, it could cause system interruptions or delays and adversely affect our operating results.

Our computer and communications systems and operations could be damaged or interrupted by fire, flood, power loss, telecommunications failure, earthquakes, acts of war or terrorism, acts of God, computer viruses, physical or electronic break-ins, and similar events or disruptions. Any of these events could cause system interruption, delays, and loss of critical data, and could prevent us from accepting and fulfilling customer orders and providing services, which could make our product and service offerings less attractive and subject us to liability. Our systems are not fully redundant and our disaster recovery planning may not be sufficient. In addition, we may have inadequate insurance coverage to compensate for any related losses. Any of these events could damage our reputation and be expensive to remedy.

We Face Significant Inventory Risk

In addition to risks described elsewhere in this Item 1A relating to fulfillment center and inventory optimization by us and third parties, we are exposed to significant inventory risks that may adversely affect our operating results as a result of seasonality, new product launches, rapid changes in product cycles and pricing, defective merchandise, changes in consumer demand and consumer spending patterns, changes in consumer tastes with respect to our products, and other factors. We endeavor to accurately predict these trends and avoid overstocking or understocking products we manufacture and/or sell. Demand for products, however, can change significantly between the time inventory or components are ordered and the date of sale. In addition, when we begin selling or manufacturing a new product, it may be difficult to establish vendor relationships, determine appropriate product or component selection, and accurately forecast demand. The acquisition of certain types of inventory or components may require significant lead-time and prepayment and they may not be returnable. We carry a broad selection and significant inventory levels of certain products, such as consumer electronics, and we may be unable to sell products in sufficient quantities or during the relevant selling seasons. Any one of the inventory risk factors set forth above may adversely affect our operating results.

We May Not Be Able to Adequately Protect Our Intellectual Property Rights or May Be Accused of Infringing Intellectual Property Rights of Third Parties

We regard our trademarks, service marks, copyrights, patents, trade dress, trade secrets, proprietary technology, and similar intellectual property as critical to our success, and we rely on trademark, copyright, and patent law, trade secret protection, and confidentiality and/or license agreements with our employees, customers, and others to protect our proprietary rights. Effective intellectual property protection may not be available in every country in which our products and services are made available. We also may not be able to acquire or maintain appropriate domain names in all countries in which we do business. Furthermore, regulations governing domain names may not protect our trademarks and similar proprietary rights. We may be unable to prevent third parties from acquiring domain names that are similar to, infringe upon, or diminish the value of our trademarks and other proprietary rights.

We may not be able to discover or determine the extent of any unauthorized use of our proprietary rights. Third parties that license our proprietary rights also may take actions that diminish the value of our proprietary rights or reputation. The protection of our intellectual property may require the expenditure of significant financial and managerial resources. Moreover, the steps we take to protect our intellectual property may not adequately protect our rights or prevent third parties from infringing or misappropriating our proprietary rights. We also cannot be certain that others will not independently develop or otherwise acquire equivalent or superior technology or other intellectual property rights.

Other parties also may claim that we infringe their proprietary rights. We have been subject to, and expect to continue to be subject to, claims and legal proceedings regarding alleged infringement by us of the intellectual property rights of third parties. Such claims, whether or not meritorious, may result in the expenditure of significant financial and managerial resources, injunctions against us, or the payment of damages. We may need to obtain licenses from third parties who allege that we have infringed their rights, but such licenses may not be available on terms acceptable to us or at all. In addition, we may not be able to obtain or utilize on terms that are favorable to us, or at all, licenses or other rights with respect to intellectual property we do not own. These risks have been amplified by the increase in third parties whose sole or primary business is to assert such claims.

Our digital content offerings depend in part on effective digital rights management technology to control access to digital content. If the digital rights management technology that we use is compromised or otherwise malfunctions, we could be subject to claims, and content providers may be unwilling to include their content in our service.

We Have a Rapidly Evolving Business Model and Our Stock Price Is Highly Volatile

We have a rapidly evolving business model. The trading price of our common stock fluctuates significantly in response to, among other risks, the risks described elsewhere in this Item 1A, as well as:

Volatility in our stock price could adversely affect our business and financing opportunities and force us to increase our cash compensation to employees or grant larger stock awards than we have historically, which could hurt our operating results or reduce the percentage ownership of our existing stockholders, or both.

Government Regulation Is Evolving and Unfavorable Changes Could Harm Our Business

We are subject to general business regulations and laws, as well as regulations and laws specifically governing the Internet, e-commerce, electronic devices, and other services. Existing and future laws and regulations may impede our growth. These regulations and laws may cover taxation, privacy, data protection, pricing, content, copyrights, distribution, mobile communications, electronic device certification, electronic waste, energy consumption, environmental regulation, electronic contracts and other communications, competition, consumer protection, web services, the provision of online payment services, unencumbered Internet access to our services, the design and operation of websites, and the characteristics and quality of products and services. It is not clear how existing laws governing issues such as property ownership, libel, and personal privacy apply to the Internet, e-commerce, digital content, and web services. Jurisdictions may regulate consumer-to-consumer online businesses, including certain aspects of our seller programs. Unfavorable regulations and laws could diminish the demand for our products and services and increase our cost of doing business.

We Do Not Collect Sales or Consumption Taxes in Some Jurisdictions

U.S. Supreme Court decisions restrict the imposition of obligations to collect state and local sales taxes with respect to remote sales. However, an increasing number of states have considered or adopted laws or administrative practices that attempt to impose obligations on out-of-state retailers to collect taxes on their behalf. We support a Federal law that would allow states to require sales tax collection under a nationwide system. More than half of our revenue is already earned in jurisdictions where we collect sales tax or its equivalent. A successful assertion by one or more states or foreign countries requiring us to collect taxes where we do not do so could result in substantial tax liabilities, including for past sales, as well as penalties and interest.

We Could be Subject to Additional Income Tax Liabilities

We are subject to income taxes in the United States and numerous foreign jurisdictions. Significant judgment is required in evaluating and estimating our provision and accruals for these taxes. During the ordinary course of business, there are many transactions for which the ultimate tax determination is uncertain. Our effective tax rates could be adversely affected by earnings being lower than anticipated in countries where we have lower statutory rates and higher than anticipated in countries where we have higher statutory rates, by losses incurred in jurisdictions for which we are not able to realize the related tax benefit, by changes in foreign currency exchange rates, by entry into new businesses and geographies and changes to our existing businesses, by acquisitions (including integrations) and investments, by changes in the valuation of our deferred tax assets and liabilities, or by changes in the relevant tax, accounting and other laws, regulations, administrative practices, principles, and interpretations, including fundamental changes to the tax laws applicable to corporate multinationals. The United States, many countries in the European Union, and a number of other countries are actively considering changes in this regard. In addition, we are subject to audit in various jurisdictions, and such jurisdictions may assess additional income tax liabilities against us. Although we believe our tax estimates are reasonable, the final outcome of tax audits and any related litigation could be materially different from our historical income tax provisions and accruals. Developments in an audit, litigation, or the relevant laws, regulations, administrative practices, principles, and interpretations could have a material effect on our operating results or cash flows in the period or periods for which that development occurs, as well as for prior and subsequent periods.

Our Supplier Relationships Subject Us to a Number of Risks

We have significant suppliers, including licensors, and in some cases, limited or single-sources of supply, that are important to our sourcing, services, manufacturing, and any related ongoing servicing of merchandise and content. We do not have long-term arrangements with most of our suppliers to guarantee availability of merchandise, content, components, or services, particular payment terms, or the extension of credit limits. If our current suppliers were to stop selling or licensing merchandise, content, components, or services to us on acceptable terms, or delay delivery, including as a result of one or more supplier bankruptcies due to poor economic conditions, as a result of natural disasters, or for other reasons, we may be unable to procure alternatives from other suppliers in a timely and efficient manner and on acceptable terms, or at all.

We May be Subject to Risks Related to Government Contracts and Related Procurement Regulations

Our contracts with U.S., as well as state, local, and foreign, government entities are subject to various procurement regulations and other requirements relating to their formation, administration, and performance. We may be subject to audits and investigations relating to our government contracts, and any violations could result in various civil and criminal penalties and administrative sanctions, including termination of contract, refunding or suspending of payments, forfeiture of profits, payment of fines, and suspension or debarment from future government business. In addition, such contracts may provide for termination by the government at any time, without cause.

We May Be Subject to Product Liability Claims if People or Property Are Harmed by the Products We Sell

Some of the products we sell or manufacture may expose us to product liability claims relating to personal injury, death, or environmental or property damage, and may require product recalls or other actions. Certain third parties also sell products using our e-commerce platform that may increase our exposure to product liability claims, such as if these sellers do not have sufficient protection from such claims. Although we maintain liability insurance, we cannot be certain that our coverage will be adequate for liabilities actually incurred or that insurance will continue to be available to us on economically reasonable terms, or at all. In addition, some of our agreements with our vendors and sellers do not indemnify us from product liability.

We Are Subject to Payments-Related Risks

We accept payments using a variety of methods, including credit card, debit card, credit accounts (including promotional financing), gift cards, direct debit from a customer's bank account, consumer invoicing, physical bank check, and payment upon delivery. For existing and future payment options we offer to our customers, we may become subject to additional regulations, compliance requirements, and fraud. For certain payment methods, including credit and debit cards, we pay interchange and other fees, which may increase over time and raise our operating costs and lower profitability. We rely on third parties to provide payment processing services, including the processing of credit cards, debit cards, electronic checks, and promotional financing, and it could disrupt our business if these companies become unwilling or unable to provide these services to us. We are also subject to payment card association operating rules, including data security rules, certification requirements, and rules governing electronic funds transfers, which could change or be reinterpreted to make it difficult or impossible for us to comply. If we fail to comply with these rules or requirements, or if our data security systems are breached or compromised, we may be liable for card issuing banks' costs, subject to fines and higher transaction fees, and lose our ability to accept credit and debit card payments from our customers, process electronic funds transfers, or facilitate other types of online payments, and our business and operating results could be adversely affected. We also offer co-branded credit card programs, which could adversely affect our operating results if terminated.

In addition, we provide regulated services in certain jurisdictions because we enable customers to keep account balances with us and transfer money to third parties, and because we provide services to third parties to facilitate payments on their behalf. In these jurisdictions, we may be subject to requirements for licensing, regulatory inspection, bonding and capital maintenance, the use, handling, and segregation of transferred funds, consumer disclosures, and authentication. We are also subject to or voluntarily comply with a number of other laws and regulations relating to payments, money laundering, international money transfers, privacy and information security, and electronic fund transfers. If we were found to be in violation of applicable laws or regulations, we could be subject to additional requirements and civil and criminal penalties, or forced to cease providing certain services.

We Could Be Liable for Fraudulent or Unlawful Activities of Sellers

The law relating to the liability of providers of online payment services is currently unsettled. In addition, governmental agencies could require changes in the way this business is conducted. Under our seller programs, we may be unable to prevent sellers from collecting payments, fraudulently or otherwise, when buyers never receive the products they ordered or when the products received are materially different from the sellers' descriptions. Under our A2Z Guarantee, we reimburse buyers for payments up to certain limits in these situations, and as our marketplace seller sales grow, the cost of this program will increase and could negatively affect our operating results. We also may be unable to prevent sellers on our sites or through other seller sites from selling unlawful goods, selling goods in an unlawful manner, or violating the proprietary rights of others, and could face civil or criminal liability for unlawful activities by our sellers.

None

As of December 31, 2013 , we operated the following facilities (in thousands):

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We own and lease our corporate headquarters in Seattle, Washington. Additionally, we own and lease corporate office, fulfillment and warehouse operations, data center, customer service, and other facilities, principally in North America, Europe, and Asia.

See Item 8 of Part II, "Financial Statements and Supplementary Data-Note 8-Commitments and Contingencies-Legal Proceedings."

Not applicable.

PART II

Market Information

Our common stock is traded on the Nasdaq Global Select Market under the symbol "AMZN." The following table sets forth the high and low per share sale prices for our common stock for the periods indicated, as reported by the Nasdaq Global Select Market.

Holders

As of January 17, 2014 , there were 2,922 shareholders of record of our common stock, although there is a much larger number of beneficial owners.

Dividends

We have never declared or paid cash dividends on our common stock. See Item 7 of Part II, "Management's Discussion and Analysis of Financial Condition and Results of Operations-Liquidity and Capital Resources."

Recent Sales of Unregistered Securities

None.

Issuer Purchases of Equity Securities

None.

The following selected consolidated financial data should be read in conjunction with the consolidated financial statements and the notes thereto in Item 8 of Part II, "Financial Statements and Supplementary Data," and the information contained in Item 7 of Part II, "Management's Discussion and Analysis of Financial Condition and Results of Operations." Historical results are not necessarily indicative of future results.

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Forward-Looking Statements

This Annual Report on Form 10-K includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All statements other than statements of historical fact, including statements regarding guidance, industry prospects, or future results of operations or financial position, made in this Annual Report on Form 10-K are forward-looking. We use words such as anticipates, believes, expects, future, intends, and similar expressions to identify forward-looking statements. Forward-looking statements reflect management's current expectations and are inherently uncertain. Actual results could differ materially for a variety of reasons, including, among others, fluctuations in foreign exchange rates, changes in global economic conditions and consumer spending, world events, the rate of growth of the Internet and online commerce, the amount that Amazon.com invests in new business opportunities and the timing of those investments, the mix of products sold to customers, the mix of net sales derived from products as compared with services, the extent to which we owe income taxes, competition, management of growth, potential fluctuations in operating results, international growth and expansion, the outcomes of legal proceedings and claims, fulfillment and data center optimization, risks of inventory management, seasonality, the degree to which the Company enters into, maintains, and develops commercial agreements, acquisitions and strategic transactions, payments risks, and risks of fulfillment throughput and productivity. In addition, the current global economic climate amplifies many of these risks. These risks and uncertainties, as well as other risks and uncertainties that could cause our actual results to differ significantly from management's expectations, are described in greater detail in Item 1A of Part I, "Risk Factors."

Overview

Our primary source of revenue is the sale of a wide range of products and services to customers . The products offered on our consumer-facing websites primarily include merchandise and content we have purchased for resale from vendors and those offered by third-party sellers, and we also manufacture and sell electronic devices. Generally, we recognize gross revenue from items we sell from our inventory as product sales and recognize our net share of revenue of items sold by other sellers as services sales. We also offer other services such as AWS, fulfillment, publishing, digital content subscriptions, advertising, and co-branded credit cards.

Our financial focus is on long-term, sustainable growth in free cash flow 1 per share. Free cash flow is driven primarily by increasing operating income and efficiently managing working capital 2 and capital expenditures. Increases in operating income primarily result from increases in sales of products and services and efficiently managing our operating costs, partially offset by investments we make in longer-term strategic initiatives. To increase sales of products and services, we focus on improving all aspects of the customer experience, including lowering prices, improving availability, offering faster delivery and performance times, increasing selection, increasing product categories and service offerings, expanding product information, improving ease of use, improving reliability, and earning customer trust. We also seek to efficiently manage shareholder dilution while maintaining the flexibility to issue shares for strategic purposes, such as financings, acquisitions, and aligning employee compensation with shareholders' interests. We utilize restricted stock units as our primary vehicle for equity compensation because we believe they align the long-term interests of our shareholders and employees. In measuring shareholder dilution, we include all vested and unvested stock awards outstanding, without regard to estimated forfeitures. Total shares outstanding plus outstanding stock awards were 476 million and 470 million as of December 31, 2013 and 2012 .

We seek to reduce our variable costs per unit and work to leverage our fixed costs. Our variable costs include product and content costs, payment processing and related transaction costs, picking, packaging, and preparing orders for shipment, transportation, customer service support, costs necessary to run AWS, and a portion of our marketing costs. Our fixed costs include the costs necessary to run our technology infrastructure; to build, enhance, and add features to our websites and web services, our electronic devices, and digital offerings; and to build and optimize our fulfillment centers. Variable costs generally change directly with sales volume, while fixed costs generally increase depending on the timing of capacity needs, geographic expansion, category expansion, and other factors. To decrease our variable costs on a per unit basis and enable us to lower prices for customers, we seek to increase our direct sourcing, increase discounts available to us from suppliers, and reduce defects in our processes. To minimize growth in fixed costs, we seek to improve process efficiencies and maintain a lean culture.

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Because of our model we are able to turn our inventory quickly and have a cash-generating operating cycle 3 . On average, our high inventory velocity means we generally collect from consumers before our payments to suppliers come due. Inventory turnover 4 was 9 , 9, and 10 for 2013 , 2012 , and 2011 . We expect variability in inventory turnover over time since it is affected by several factors, including our product mix, the mix of sales by us and by other sellers, our continuing focus on in-stock inventory availability and selection of product offerings, our investment in new geographies and product lines, and the extent to which we choose to utilize outsource fulfillment providers. Accounts payable days 5 were 74, 76, and 74 for 2013 , 2012 , and 2011 . We expect some variability in accounts payable days over time since they are affected by several factors, including the mix of product sales, the mix of sales by other sellers, the mix of suppliers, seasonality, and changes in payment terms over time, including the effect of balancing pricing and timing of payment terms with suppliers.

We expect spending in technology and content will increase over time as we add computer scientists, designers, software and hardware engineers, and merchandising employees. We seek to efficiently invest in several areas of technology and content such as web services, expansion of new and existing product categories and offerings, and initiatives to expand our ecosystem of digital products and services, as well as in technology infrastructure to enhance the customer experience and improve our process efficiencies. We believe that advances in technology, specifically the speed and reduced cost of processing power and the advances of wireless connectivity, will continue to improve the consumer experience on the Internet and increase its ubiquity in people's lives. To best take advantage of these continued advances in technology, we are investing in initiatives to build and deploy innovative and efficient software and electronic devices. We are also investing in AWS, which provides technology services that give developers and enterprises of all sizes access to technology infrastructure that enables virtually any type of business.

Our financial reporting currency is the U.S. Dollar and changes in exchange rates significantly affect our reported results and consolidated trends . For example, if the U.S. Dollar weakens year-over-year relative to currencies in our international locations, our consolidated net sales and operating expenses will be higher than if currencies had remained constant. Likewise, if the U.S. Dollar strengthens year-over-year relative to currencies in our international locations, our consolidated net sales and operating expenses will be lower than if currencies had remained constant. We believe that our increasing diversification beyond the U.S. economy through our growing international businesses benefits our shareholders over the long term. We also believe it is useful to evaluate our operating results and growth rates before and after the effect of currency changes.

In addition, the remeasurement of our intercompany balances can result in significant gains and charges associated with the effect of movements in currency exchange rates. Currency volatilities may continue, which may significantly impact (either positively or negatively) our reported results and consolidated trends and comparisons.

For additional information about each line item summarized above, refer to Item 8 of Part II, "Financial Statements and Supplementary Data-Note 1-Description of Business and Accounting Policies."

Critical Accounting Judgments

The preparation of financial statements in conformity with generally accepted accounting principles of the United States ("GAAP") requires estimates and assumptions that affect the reported amounts of assets and liabilities, revenues and expenses, and related disclosures of contingent assets and liabilities in the consolidated financial statements and accompanying notes. The SEC has defined a company's critical accounting policies as the ones that are most important to the portrayal of the company's financial condition and results of operations, and which require the company to make its most difficult and subjective judgments, often as a result of the need to make estimates of matters that are inherently uncertain. Based on this definition, we have identified the critical accounting policies and judgments addressed below. We also have other key accounting policies, which involve the use of estimates, judgments, and assumptions that are significant to understanding our results. For additional information, see Item 8 of Part II, "Financial Statements and Supplementary Data-Note 1-Description of Business and Accounting Policies." Although we believe that our estimates, assumptions, and judgments are reasonable, they are based upon information presently available. Actual results may differ significantly from these estimates under different assumptions, judgments, or conditions.

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Inventories

Inventories, consisting of products available for sale, are primarily accounted for using the first-in first-out ("FIFO") method, and are valued at the lower of cost or market value. This valuation requires us to make judgments, based on currently-available information, about the likely method of disposition, such as through sales to individual customers, returns to product vendors, or liquidations, and expected recoverable values of each disposition category. These assumptions about future disposition of inventory are inherently uncertain and changes in our estimates and assumptions may cause us to realize material write-downs in the future. As a measure of sensitivity, for every 1% of additional inventory valuation allowance as of December 31, 2013 , we would have recorded an additional cost of sales of approximately $79 million.

Goodwill

We evaluate goodwill for impairment annually or more frequently when an event occurs or circumstances change that indicate that the carrying value may not be recoverable. Our annual testing date is October 1. We test goodwill for impairment by first comparing the book value of net assets to the fair value of the reporting units. If the fair value is determined to be less than the book value or qualitative factors indicate that it is more likely than not that goodwill is impaired, a second step is performed to compute the amount of impairment as the difference between the estimated fair value of goodwill and the carrying value. We estimate the fair value of the reporting units using discounted cash flows. Forecasts of future cash flows are based on our best estimate of future net sales and operating expenses, based primarily on expected category expansion, pricing, market segment share, and general economic conditions. Certain estimates of discounted cash flows involve businesses and geographies with limited financial history and developing revenue models. Changes in these forecasts could significantly change the amount of impairment recorded, if any.

During the year, management monitored the actual performance of the business relative to the fair value assumptions used during our annual goodwill impairment test. For the periods presented, no triggering events were identified that required an update to our annual impairment test. As a measure of sensitivity, a 10% decrease in the fair value of any of our reporting units as of December 31, 2013 would have had no impact on the carrying value of our goodwill.

Financial and credit market volatility directly impacts our fair value measurement through our weighted average cost of capital that we use to determine our discount rate and through our stock price that we use to determine our market capitalization. During times of volatility, significant judgment must be applied to determine whether credit or stock price changes are a short-term swing or a longer-term trend. We have not made any significant changes to the accounting methodology used to evaluate goodwill impairment. Changes in our estimated future cash flows and asset fair values may cause us to realize material impairment charges in the future. As a measure of sensitivity, a prolonged 20% decrease from our December 31, 2013 closing stock price would not be an indicator of possible impairment.

Stock-Based Compensation

We measure compensation cost for stock awards at fair value and recognize it as compensation expense over the service period for awards expected to vest. The fair value of restricted stock units is determined based on the number of shares granted and the quoted price of our common stock. The estimation of stock awards that will ultimately vest requires judgment for the amount that will be forfeited, and to the extent actual results or updated estimates differ from our current estimates, such amounts will be recorded as a cumulative adjustment in the period estimates are revised. We consider many factors when estimating expected forfeitures, including employee class, economic environment, and historical experience. We update our estimated forfeiture rate quarterly. We have not made any significant changes to the accounting methodology used to evaluate stock-based compensation. Changes in our estimates and assumptions may cause us to realize material changes in stock-based compensation expense in the future. As a measure of sensitivity, a 1% change to our estimated forfeiture rate would have had an approximately $32 million impact on our 2013 operating income. Our estimated forfeiture rate as of December 31, 2013 and 2012 was 27%.

We utilize the accelerated method, rather than the straight-line method, for recognizing compensation expense. For example, over 50% of the compensation cost related to an award vesting ratably over four years is expensed in the first year. If forfeited early in the life of an award, the compensation expense adjustment is much greater under an accelerated method than under a straight-line method.

Income Taxes

We are subject to income taxes in the U.S. and numerous foreign jurisdictions. Significant judgment is required in evaluating and estimating our provision and accruals for these taxes. During the ordinary course of business, there are many transactions for which the ultimate tax determination is uncertain. Our effective tax rates could be adversely affected by earnings being lower than anticipated in countries where we have lower statutory rates and higher than anticipated in countries where we have higher statutory rates, losses incurred in jurisdictions for which we are not able to realize the related tax benefit, changes in foreign currency exchange rates, entry into new businesses and geographies and changes to our existing businesses, acquisitions (including integrations) and investments, changes in the valuation of our deferred tax assets and liabilities, or changes in the relevant tax, accounting, and other laws, regulations, administrative practices, principles, and interpretations, including fundamental changes to the tax laws applicable to corporate multinationals. The U.S., many countries in the European Union, and a number of other countries are actively considering changes in this regard. In addition, we are subject to audit in various jurisdictions, and such jurisdictions may assess additional income tax liabilities against us. Although we believe our tax estimates are reasonable, the final outcome of tax audits and any related litigation could be materially different from our historical income tax provisions and accruals. Developments in an audit, litigation, or the relevant laws, regulations, administrative practices, principles, and interpretations could have a material effect on our operating results or cash flows in the period or periods for which that development occurs, as well as for prior and subsequent periods.

Liquidity and Capital Resources

Cash flow information is as follows (in millions):

Our financial focus is on long-term, sustainable growth in free cash flow. Free cash flow, a non-GAAP financial measure, was $2.0 billion for 2013 , compared to $395 million and $2.1 billion for 2012 and 2011 . See "Results of Operations-Non-GAAP Financial Measures" below for a reconciliation of free cash flow to cash provided by operating activities. The increase in free cash flow for 2013 , compared to the comparable prior year period, was primarily due to higher operating cash flows and decreased capital expenditures. The decrease in free cash flow for 2012 , compared to the comparable prior year period, was due to increased capital expenditures, including a $1.4 billion purchase of property in December 2012, partially offset by higher operating cash flows. Operating cash flows and free cash flows can be volatile and are sensitive to many factors, including changes in working capital, the timing and magnitude of capital expenditures, and our net income (loss). Working capital at any specific point in time is subject to many variables, including seasonality, inventory management and category expansion, the timing of cash receipts and payments, vendor payment terms, and fluctuations in foreign exchange rates.

Our principal sources of liquidity are cash flows generated from operations and our cash, cash equivalents, and marketable securities balances, which, at fair value, were $12.4 billion , $11.4 billion , and $9.6 billion as of December 31, 2013 , 2012 , and 2011 . Amounts held in foreign currencies were $5.6 billion , $5.1 billion, and $4.1 billion as of December 31, 2013 , 2012 , and 2011 , and were primarily Euros, British Pounds, Japanese Yen, and Chinese Yuan.

Cash provided by operating activities was $5.5 billion , $4.2 billion , and $3.9 billion in 2013 , 2012 , and 2011 . Our operating cash flows result primarily from cash received from our consumer, seller, and enterprise customers, advertising agreements, and our co-branded credit card agreements, offset by cash payments we make for products and services, employee compensation (less amounts capitalized related to internal-use software that are reflected as cash used in investing activities), payment processing and related transaction costs, operating leases, and interest payments on our long-term obligations. Cash received from our consumer, seller, and enterprise customers, and other activities generally corresponds to our net sales. Because consumers primarily use credit cards to buy from us, our receivables from consumers settle quickly. The increase in operating cash flow in 2013 , compared to the comparable prior year period, was primarily due to the increase in net income, excluding depreciation, amortization, and stock-based compensation, partially offset by changes in working capital. The increase in operating cash flow in 2012, compared to the comparable prior year period, was primarily due to the increase in net income, excluding depreciation, amortization, and stock-based compensation, additions to unearned revenue, and changes in working capital, partially offset by increased tax benefits on excess stock-based compensation deductions.

Cash provided by (used in) investing activities corresponds with capital expenditures, including leasehold improvements, internal-use software and website development costs, cash outlays for acquisitions, investments in other companies and intellectual property rights, and purchases, sales, and maturities of marketable securities. Cash provided by (used in) investing activities was $(4.3) billion , $(3.6) billion , and $(1.9) billion in 2013 , 2012 , and 2011 , with the variability caused primarily by changes in capital expenditures, purchases, maturities, and sales of marketable securities and other investments, and changes in cash paid for acquisitions. Capital expenditures were $3.4 billion , $3.8 billion , and $1.8 billion during 2013 , 2012 , and 2011 . In December 2012 , we acquired 11 buildings comprising 1.8 million square feet of our previously leased corporate office space and three city blocks in Seattle, Washington for $1.4 billion. Excluding this acquisition, increases in capital expenditures primarily reflect additional capacity to support our fulfillment operations and additional investments in support of continued business growth due to investments in technology infrastructure, including AWS, during all three periods. We expect this trend to continue over time. Capital expenditures included $493 million, $381 million, and $256 million for internal-use software and website development during 2013 , 2012 , and 2011 . Stock-based compensation capitalized for internal-use software and website development costs does not affect cash flows. In 2013 , 2012 , and 2011 , we made cash payments, net of acquired cash, related to acquisition and other investment activity of $312 million , $745 million , and $705 million .

Cash provided by (used in) financing activities was $(539) million , $2.3 billion , and $(482) million in 2013 , 2012 , and 2011 . Cash outflows from financing activities result from common stock repurchases, payments on obligations related to capital leases and leases accounted for as financing arrangements, and repayments of long-term debt. Payments on obligations related to capital leases and leases accounted for as financing arrangements and repayments of long-term debt were $1.0

billion , $588 million , and $444 million in 2013 , 2012 , and 2011 . Property and equipment acquired under capital leases were $1.9 billion , $802 million , and $753 million in 2013 , 2012 , and 2011 , with the increases primarily reflecting additional investments in support of continued business growth due to investments in technology infrastructure, including AWS. We repurchased 5.3 million shares of common stock for $960 million in 2012 and 1.5 million shares of common stock for $277 million in 2011 under the $2.0 billion repurchase program authorized by our Board of Directors in January 2010. Cash inflows from financing activities primarily result from proceeds from long-term debt and tax benefits relating to excess stock-based compensation deductions. Proceeds from long-term debt and other were $394 million , $3.4 billion , and $177 million in 2013 , 2012 , and 2011 . During 2012, cash inflows from financing activities consisted primarily of net proceeds from the issuance of $3.0 billion of senior nonconvertible unsecured debt in three tranches: $750 million of 0.65% notes due in 2015; $1.0 billion of 1.20% notes due in 2017; and $1.3 billion of 2.50% notes due in 2022. See Item 8 of Part II, "Financial Statements and Supplementary Data-Note 6-Long-Term Debt" for additional discussion of the notes. Tax benefits relating to excess stock-based compensation deductions are presented as financing cash flows. Cash inflows from tax benefits related to stock-based compensation deductions were $78 million , $429 million , and $62 million in 2013 , 2012 , and 2011 .

In 2013 , 2012 , and 2011 we recorded net tax provisions of $161 million , $428 million , and $291 million . Except as required under U.S. tax law, we do not provide for U.S. taxes on our undistributed earnings of foreign subsidiaries that have not been previously taxed since we intend to invest such undistributed earnings indefinitely outside of the U.S. If our intent changes or if these funds are needed for our U.S. operations, we would be required to accrue or pay U.S. taxes on some or all of these undistributed earnings. As of December 31, 2013 , cash held by foreign subsidiaries was $4.6 billion, which include undistributed earnings of foreign subsidiaries indefinitely invested outside of the U.S. of $2.5 billion . We have tax benefits relating to excess stock-based compensation deductions and accelerated depreciation deductions that are being utilized to reduce our U.S. taxable income. Accelerated depreciation deductions on qualifying property were a result of U.S. legislation that expired in December 2013. As such, cash taxes paid (net of refunds) were $169 million , $112 million , and $33 million for 2013 , 2012 , and 2011 . As of December 31, 2013 , our federal net operating loss carryforward was approximately $275 million and we had approximately $295 million of federal tax credits potentially available to offset future tax liabilities. The U.S. federal research and development credit expired in December 2013. As we utilize our federal net operating losses and tax credits, we expect cash paid for taxes to significantly increase. We endeavor to optimize our global taxes on a cash basis, rather than on a financial reporting basis.

Our liquidity is also affected by restricted cash balances that are pledged as collateral for standby letters of credit, guarantees, debt, and real estate lease agreements. As of December 31, 2013 and 2012 , restricted cash, cash equivalents, and marketable securities were $301 million and $99 million . To the extent we process payments for third-party sellers or offer certain types of stored value to our customers, some states may restrict our use of those funds. This restriction would result in the reclassification of a portion of our cash and cash equivalents from "Cash and cash equivalents" to "Accounts receivable, net and other" on our consolidated balance sheets. See Item 8 of Part II, "Financial Statements and Supplementary Data-Note 8-Commitments and Contingencies" for additional discussion of our principal contractual commitments, as well as our pledged assets. Purchase obligations and open purchase orders, consisting of inventory and significant non-inventory commitments, were $4.4 billion as of December 31, 2013 . Purchase obligations and open purchase orders are generally cancellable in full or in part through the contractual provisions.

On average, our high inventory velocity means we generally collect from consumers before our payments to suppliers come due. Inventory turnover was 9 , 9, and 10 for 2013 , 2012 , and 2011 . We expect variability in inventory turnover over time since it is affected by several factors, including our product mix, the mix of sales by us and by other sellers, our continuing focus on in-stock inventory availability and selection of product offerings, our investment in new geographies and product lines, and the extent to which we choose to utilize outsource fulfillment providers.

We believe that cash flows generated from operations and our cash, cash equivalents, and marketable securities balances will be sufficient to meet our anticipated operating cash needs for at least the next 12 months. However, any projections of future cash needs and cash flows are subject to substantial uncertainty. See Item 1A of Part I, "Risk Factors." We continually evaluate opportunities to sell additional equity or debt securities, obtain credit facilities, repurchase common stock, pay dividends, or repurchase, refinance, or otherwise restructure our debt for strategic reasons or to further strengthen our financial position. The sale of additional equity or convertible debt securities would likely be dilutive to our shareholders. In addition, we will, from time to time, consider the acquisition of, or investment in, complementary businesses, products, services, and technologies, which might affect our liquidity requirements or cause us to issue additional equity or debt securities. There can be no assurance that additional lines-of-credit or financing instruments will be available in amounts or on terms acceptable to us, if at all.

Results of Operations

We have organized our operations into two segments: North America and International. We present our segment information along the same lines that our Chief Executive Officer reviews our operating results in assessing performance and allocating resources.

Net Sales

Net sales include product and services sales. Product sales represent revenue from the sale of products and related shipping fees and digital content where we are the seller of record. Services sales represent third-party seller fees earned (including commissions) and related shipping fees, digital content subscriptions, and non-retail activities such as AWS, advertising services, and our co-branded credit card agreements. Amazon Prime membership fees are allocated between product sales and services sales. Net sales information is as follows (in millions):

Sales grew 22% , 27% , and 41% in 2013 , 2012 , and 2011 , compared to the comparable prior year periods. Changes in currency exchange rates impacted net sales by $(1.3) billion , $(854) million , and $1.1 billion for 2013 , 2012 , and 2011 . For a discussion of the effect on sales growth of exchange rates, see "Effect of Exchange Rates" below.

North America sales grew 28% , 30% , and 43% in 2013 , 2012 , and 2011 , compared to the comparable prior year periods. The sales growth in each year primarily reflects increased unit sales, including sales by marketplace sellers. Increased unit sales were driven largely by our continued efforts to reduce prices for our customers, including from our shipping offers, by sales in faster growing categories such as electronics and other general merchandise, by increased in-stock inventory availability, and by increased selection of product offerings.

International sales grew 14% , 23% , and 38% in 2013 , 2012 , and 2011 , compared to the comparable prior year periods. The sales growth in each year primarily reflects increased unit sales, including sales by marketplace sellers. Increased unit sales were driven largely by our continued efforts to reduce prices for our customers, including from our shipping offers, by sales in faster growing categories such as electronics and other general merchandise, by increased in-stock inventory availability, and by increased selection of product offerings. Additionally, changes in currency exchange rates impacted International net sales by $(1.3) billion , $(853) million , and $1.1 billion in 2013 , 2012 , and 2011 . We expect that, over time, our International segment will represent 50% or more of our consolidated net sales. See Item 8 of Part II, "Financial Statements and Supplementary Data-Note 12-Segment Information" for net sales attributed to foreign countries.

Supplemental Information

Supplemental information about outbound shipping results is as follows (in millions):

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We expect our net cost of shipping to continue to increase to the extent our customers accept and use our shipping offers at an increasing rate, our product mix shifts to the electronics and other general merchandise category, we reduce shipping rates, we use more expensive shipping methods, and we offer additional services. We seek to mitigate costs of shipping over time in part through achieving higher sales volumes, optimizing placement of fulfillment centers, negotiating better terms with our suppliers, and achieving better operating efficiencies. We believe that offering low prices to our customers is fundamental to our future success, and one way we offer lower prices is through shipping offers.

Net sales by similar products and services were as follows (in millions):

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Operating Expenses

Information about operating expenses with and without stock-based compensation is as follows (in millions):

Operating expenses without stock-based compensation are non-GAAP financial measures. See "Non-GAAP Financial Measures" and Item 8 of Part I, "Financial Statements and Supplementary Data-Note 1-Description of Business and Accounting Policies-Stock-Based Compensation."

Cost of Sales

Cost of sales consists of the purchase price of consumer products and digital content where we are the seller of record, including Prime Instant Video, inbound and outbound shipping charges, and packaging supplies. Shipping charges to receive products from our suppliers are included in our inventory, and recognized as cost of sales upon sale of products to our customers.

The increase in cost of sales in absolute dollars in 2013 , 2012 , and 2011 , compared to the comparable prior year periods, is primarily due to increased product, digital content, and shipping costs resulting from increased sales, as well as from expansion of digital offerings.

Consolidated gross profit and gross margin for each of the periods presented were as follows:

Gross margin increased in 2013 , compared to the comparable prior year periods, primarily due to services sales increasing as a percentage of total sales. Services sales represent third-party seller fees earned (including commissions) and related shipping fees, and non-retail activities such as AWS, advertising services, and our co-branded credit card agreements. We believe that income from operations is a more meaningful measure than gross profit and gross margin due to the diversity of our product categories and services.

Fulfillment

Fulfillment costs as a percentage of net sales may vary due to several factors, such as payment processing and related transaction costs, our level of productivity and accuracy, changes in volume, size, and weight of units received and fulfilled, timing of fulfillment capacity expansion, the extent we utilize fulfillment services provided by third parties, mix of products and services sold, and our ability to affect customer service contacts per unit by implementing improvements in our operations

and enhancements to our customer self-service features. Additionally, because payment processing and fulfillment costs associated with seller transactions are based on the gross purchase price of underlying transactions, and payment processing and related transaction and fulfillment costs are higher as a percentage of sales versus our retail sales, sales by our sellers have higher fulfillment costs as a percent of net sales.

The increase in fulfillment costs in absolute dollars in 2013 , 2012 , and 2011 , compared to the comparable prior year periods, is primarily due to variable costs corresponding with increased physical and digital product and services sales volume, inventory levels, and sales mix; costs from expanding fulfillment capacity; and payment processing and related transaction costs.

We seek to expand our fulfillment capacity to accommodate greater selection and in-stock inventory levels and meet anticipated shipment volumes from sales of our own products as well as sales by third parties for which we provide the fulfillment services. We evaluate our facility requirements as necessary.

Marketing

We direct customers to our websites primarily through a number of targeted online marketing channels, such as our Associates program, sponsored search, portal advertising, email marketing campaigns, and other initiatives. Our marketing expenses are largely variable, based on growth in sales and changes in rates. To the extent there is increased or decreased competition for these traffic sources, or to the extent our mix of these channels shifts, we would expect to see a corresponding change in our marketing expense.

The increase in marketing costs in absolute dollars in 2013 , 2012 , and 2011 , compared to the comparable prior year periods, is primarily due to increased spending on online marketing channels, such as our sponsored search programs and our Associates program, payroll and related expenses, and television advertising.

While costs associated with Amazon Prime memberships and other shipping offers are not included in marketing expense, we view these offers as effective worldwide marketing tools, and intend to continue offering them indefinitely.

Technology and Content

We seek to efficiently invest in several areas of technology and content such as technology infrastructure, including AWS, expansion of new and existing product categories and offerings, and initiatives to expand our ecosystem of digital products and services, as well as in technology infrastructure so we may continue to enhance the customer experience and improve our process efficiency. We expect spending in technology and content to increase over time as we continue to add employees and technology infrastructure.

The increase in technology and content costs in absolute dollars in 2013 , 2012 , and 2011 , compared to the comparable prior year periods, is primarily due to increases in payroll and related expenses, including those associated with our initiatives to expand our ecosystem of digital products and services, and increased spending on technology infrastructure, including AWS. We expect these trends to continue over time as we invest in these areas by increasing payroll and related expenses and adding technology infrastructure.

For 2013 , 2012 , and 2011 , we capitalized $581 million (including $87 million of stock-based compensation), $454 million (including $74 million of stock-based compensation), and $307 million (including $51 million of stock-based compensation) of costs associated with internal-use software and website development. Amortization of previously capitalized amounts was $451 million , $327 million , and $236 million for 2013 , 2012 , and 2011 . A majority of our technology costs are incurred in the U.S., most of which are allocated to our North America segment. Infrastructure, other technology, and operating costs incurred to support AWS are included in technology and content.

General and Administrative

The increase in general and administrative costs in absolute dollars in 2013 , 2012 , and 2011 , compared to the comparable prior year periods, is primarily due to increases in payroll and related expenses.

Stock-Based Compensation

Stock-based compensation was $1.1 billion , $833 million , and $557 million during 2013 , 2012 , and 2011 . The increase in 2013 , 2012 , and 2011 , compared to the comparable prior year periods, is primarily due to an increase in the number of stock-based compensation awards granted to existing and new employees.

Other Operating Expense (Income), Net

Other operating expense (income), net was $114 million , $159 million , and $154 million during 2013 , 2012 , and 2011 , and was primarily related to the amortization of intangible assets, partially offset by the settlement of certain unclaimed property and indemnification claims in Q3 2013.

Income from Operations

For the reasons discussed above, income from operations increased 10% in 2013 , decreased 22% in 2012 , and decreased 39% in 2011 .

Interest Income and Expense

Our interest income was $38 million , $40 million , and $61 million during 2013 , 2012 , and 2011 . We generally invest our excess cash in investment grade short- to intermediate-term fixed income securities and AAA-rated money market funds. Our interest income corresponds with the average balance of invested funds and the prevailing rates we are earning on them, which vary depending on the geographies and currencies in which they are invested.

The primary components of our interest expense are related to our long-term debt and capital and financing lease arrangements. Interest expense was $141 million , $92 million , and $65 million in 2013 , 2012 , and 2011 .

Our long-term debt was $3.2 billion and $3.1 billion as of December 31, 2013 and 2012 . Our other long-term liabilities were $4.2 billion and $2.3 billion as of December 31, 2013 and 2012 . See Item 8 of Part II, "Financial Statements and Supplementary Data-Note 6-Long-Term Debt and Note 7-Other Long-Term Liabilities" for additional information.

Other Income (Expense), Net

Other income (expense), net was $(136) million , $(80) million , and $76 million during 2013 , 2012 , and 2011 . The primary component of other income (expense), net is related to foreign-currency gains (losses) on intercompany balances.

Income Taxes

Our effective tax rate is subject to significant variation due to several factors, including variability in our pre-tax and taxable income and loss and the mix of jurisdictions to which they relate, changes in how we do business, acquisitions (including integrations) and investments, audit developments, foreign currency gains (losses), changes in law, regulations, and administrative practices, and relative changes of expenses or losses for which tax benefits are not recognized.

We recorded a provision for income taxes of $161 million , $428 million , and $291 million in 2013 , 2012 , and 2011 . Our effective tax rate in 2013 was lower than the 35% U.S. federal statutory rate and our effective tax rate in 2012 primarily due to the favorable impact of earnings in lower tax rate jurisdictions, a decline in the proportion of our losses for which we may not realize a related tax benefit, and the retroactive extension of the U.S. federal research and development credit, which expired in December 2013. The favorable impact of earnings in lower tax rate jurisdictions primarily relates to our European operations, which are headquartered in Luxembourg. Losses for which we may not realize a related tax benefit, primarily due to losses of foreign subsidiaries, reduce our pre-tax income without a corresponding reduction in our tax expense, and therefore increase our effective tax rate. In 2013, we recognized tax benefits for a greater proportion of these losses as compared to 2012. We have recorded valuation allowances against the deferred tax assets associated with losses for which we may not realize a related tax benefit.

In 2012, our effective tax rate was higher than the 35% U.S. federal statutory rate and our effective tax rate in 2011 primarily due to the adverse impact of foreign jurisdiction losses of subsidiaries primarily located outside of Europe for which we may not realize a tax benefit. The adverse impact of these losses was partially offset by the favorable impact of earnings in lower tax rate jurisdictions primarily related to our European operations. Additionally, our effective tax rate in 2012 was more volatile as compared to 2011 due to the lower level of pre-tax income generated during the year, relative to our tax expense. Our effective tax rate in 2012 was also adversely impacted by acquisitions (including integrations), audit developments, nondeductible expenses, and changes in tax law such as the expiration of the U.S. federal research and development credit at the end of 2011.

We have tax benefits relating to excess stock-based compensation deductions that are being utilized to reduce our U.S. taxable income. As of December 31, 2013 , our federal net operating loss carryforward was approximately $275 million and we had approximately $295 million of federal tax credits potentially available to offset future tax liabilities.

Equity-Method Investment Activity, Net of Tax

Equity-method investment activity, net of tax, was $(71) million , $(155) million , and $(12) million in 2013 , 2012 , and 2011 . Details of the activity are provided below (in millions):

Effect of Exchange Rates

The effect on our consolidated statements of operations from changes in exchange rates versus the U.S. Dollar is as follows (in millions):

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Non-GAAP Financial Measures

Regulation G, Conditions for Use of Non-GAAP Financial Measures, and other SEC regulations define and prescribe the conditions for use of certain non-GAAP financial information. Our measures of "Free cash flow," operating expenses with and without stock-based compensation, and the effect of exchange rates on our consolidated statements of operations, meet the definition of non-GAAP financial measures.

Free cash flow is used in addition to and in conjunction with results presented in accordance with GAAP and free cash flow should not be relied upon to the exclusion of GAAP financial measures.

Free cash flow, which we reconcile to "Net cash provided by (used in) operating activities," is cash flow from operations reduced by "Purchases of property and equipment, including internal-use software and website development," which are included in cash flow from investing activities. We use free cash flow, and ratios based on it, to conduct and evaluate our business because, although it is similar to cash flow from operations, we believe it typically will present a more conservative measure of cash flow from operations since purchases of property and equipment, including internal-use software and website development, are a necessary component of ongoing operations.

Free cash flow has limitations due to the fact that it does not represent the residual cash flow available for discretionary expenditures. For example, free cash flow does not incorporate the portion of payments representing principal reductions of debt, property and equipment acquired under capital leases and other leases accounted for as financing arrangements, or cash

payments for business acquisitions. Therefore, we believe it is important to view free cash flow as a complement to our entire consolidated statements of cash flows.

The following is a reconciliation of free cash flow to the most comparable GAAP measure, "Net cash provided by (used in) operating activities," for 2013 , 2012 , and 2011 (in millions):

Operating expenses with and without stock-based compensation is provided to show the impact of stock-based compensation, which is non-cash and excluded from our internal operating plans and measurement of financial performance (although we consider the dilutive impact to our shareholders when awarding stock-based compensation and value such awards accordingly). In addition, unlike other centrally-incurred operating costs, stock-based compensation is not allocated to segment results and therefore excluding it from operating expenses is consistent with our segment presentation in our footnotes to the consolidated financial statements.

Operating expenses without stock-based compensation has limitations since it does not include all expenses primarily related to our workforce. More specifically, if we did not pay out a portion of our compensation in the form of stock-based compensation, our cash salary expense included in the "Fulfillment," "Marketing," "Technology and content," and "General and administrative" line items would be higher.

Information regarding the effect of exchange rates, versus the U.S. Dollar, on our consolidated statements of operations is provided to show reported period operating results had the exchange rates remained the same as those in effect in the comparable prior year period.

Guidance

We provided guidance on January 30, 2014 , in our earnings release furnished on Form 8-K as set forth below. These forward-looking statements reflect Amazon.com's expectations as of January 30, 2014 , and are subject to substantial uncertainty. Our results are inherently unpredictable and may be materially affected by many factors, such as fluctuations in foreign exchange rates, changes in global economic conditions and consumer spending, world events, the rate of growth of the Internet and online commerce, as well as those outlined in Item 1A of Part I, "Risk Factors."

First Quarter 2014 Guidance

We are exposed to market risk for the effect of interest rate changes, foreign currency fluctuations, and changes in the market values of our investments. Information relating to quantitative and qualitative disclosures about market risk is set forth below and in Item 7 of Part II, "Management's Discussion and Analysis of Financial Condition and Results of Operations-Liquidity and Capital Resources."

Interest Rate Risk

Our exposure to market risk for changes in interest rates relates primarily to our investment portfolio and our long-term debt. All of our cash equivalent and marketable fixed income securities are designated as available-for-sale and, accordingly, are presented at fair value on our consolidated balance sheets. We generally invest our excess cash in investment grade short- to intermediate-term fixed income securities and AAA-rated money market funds. Fixed rate securities may have their fair market value adversely affected due to a rise in interest rates, and we may suffer losses in principal if forced to sell securities that have declined in market value due to changes in interest rates.

The following table provides information about our current and long-term cash equivalent and marketable fixed income securities, including principal cash flows by expected maturity and the related weighted average interest rates as of December 31, 2013 (in millions, except percentages):