UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K10-K/A

(Amendment No. 1)

For the fiscal year ended December 31, 2015

OR

For the transition period from              to             

Commission File Number 000-28018

Yahoo! Inc.

(Exact name of Registrant as specified in its charter)

701 First Avenue

Sunnyvale, California 94089

(Address of principal executive offices, including zip code)

Registrant’s telephone number, including area code: (408) 349-3300

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

Securities registered pursuant to Section 12(g) of the Act: None

(Title of Class)

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

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

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  þ    No  ¨

Indicate by check mark whether the Registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  þ    No  ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405 of this chapter) is not contained herein, and will not be contained, to the best of Registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.  þ

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 by Rule 12b-2 of the Exchange Act).    Yes  ¨    No  þ

As of June 30, 2015, the last business day of the Registrant’s most recently completed second fiscal quarter, the aggregate market value of voting stock held by non-affiliates of the Registrant, based upon the closing sales price for the Registrant’s common stock, as reported on the NASDAQ Global Select Market was $34,070,929,391. Shares of common stock held by each officer and director and by each person who owns 10 percent or more of the outstanding common stock have been excluded in that such persons may be deemed to be affiliates. This determination of affiliate status is not necessarily a conclusive determination for any other purpose.

The number of shares of the Registrant’s common stock outstanding as of February 12,April 22, 2016 was 946,811,547.948,931,950.

DOCUMENTS INCORPORATED BY REFERENCE

The following documents (or parts thereof) are incorporated by reference into the following parts of this Form 10-K:

Proxy Statement for the 2016 Annual Meeting of Shareholders—Part III Items 10, 11, 12, 13, and 14. None

YAHOO! INC.EXPLANATORY NOTE

This Amendment No. 1 to Form 10-K

Fiscal Year Ended (this “Amendment”) amends the Annual Report on Form 10-K for the fiscal year ended December 31, 2015 (the “2015 Form 10-K”) originally filed on February 29, 2016 (the “Original Filing”) by Yahoo! Inc., a Delaware corporation (“Yahoo,” the “Company,” “we,” or “us”). We are filing this Amendment to present the information required by Part III of Form 10-K as we will not file our definitive proxy statement within 120 days of the end of our fiscal year ended December 31, 2015.

Except as described above, no other changes have been made to the Original Filing. The Original Filing continues to speak as of the date of the Original Filing, and we have not updated the disclosures contained therein to reflect any events which occurred at a date subsequent to the filing of the Original Filing.

INDEX

The trademarks and/or registered trademarks of Yahoo! Inc. and its subsidiaries referred to herein include, but are not limited to, Yahoo!, the Yahoo family of marks, Tumblr, Yahoo Gemini, BrightRoll, Xobni, Flurry and Flurry Analytics, and Polyvore, and their respective logos. Other names are trademarks and/or registered trademarks of their respective owners.

Forward-Looking Statements

In addition to current and historical information, this Annual Report on Form 10-K contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements relate to our future operations, prospects, potential products, services, developments, and business strategies. These statements can, in some cases, be identified by the use of terms such as “may,” “will,” “should,” “could,” “would,” “intend,” “expect,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “project,” “potential,” or “continue,” the negative of such terms, or other comparable terminology. This Annual Report on Form 10-K includes, among others, forward-looking statements regarding:

These statements involve certain known and unknown risks and uncertainties that could cause our actual results to differ materially from those expressed or implied in our forward-looking statements. You are urged to carefully review the disclosures made concerning risks and uncertainties that may affect our business or operating results, which include, among others, those listed in Part 1, Item 1A “Risk Factors” of this Annual Report on Form 10-K. We do not intend, and undertake no obligation, to update or revise any of our forward-looking statements after the date of this Annual Report on Form 10-K to reflect new information, actual results or future events or circumstances.

PART I

Item 1. Business

Overview

Yahoo! Inc., together with its consolidated subsidiaries (“Yahoo,” the “Company,” “we,” or “us”), is a guide to digital information discovery, focused on informing, connecting, and entertaining our users through our search, communications, and digital content products. By creating highly personalized experiences, we help users discover the information that matters most to them around the world—on mobile or desktop.

We create value for advertisers with a streamlined, simple advertising technology stack that leverages Yahoo’s data, content, and technology to connect advertisers with their target audiences. Advertisers can build their businesses through advertisements targeted to audiences on our online properties and services (“Yahoo Properties”) and a distribution network of third-party entities (“Affiliates”) who integrate our advertising offerings into their websites or other offerings (“Affiliate sites”). Our revenue is generated principally from display and search advertising.

We are proud of our rich history that has evolved with the Internet, beginning in 1994 when our founders, Jerry Yang and David Filo, then graduate students at Stanford University, createdJerry and Dave’s Guide to the World Wide Web, a simple directory of websites to help people navigate the Internet. Yahoo was incorporated in 1995 and is a Delaware corporation. We completed our initial public offering on April 12, 1996, and our stock is listed on the NASDAQ Global Select Market under the symbol “YHOO.” Yahoo is a global company headquartered in Sunnyvale, California.

Executive Leadership

The current executive management team includes:

Our current Board of Directors is composed of:

Strategic Plan

On February 2, 2016, we announced a strategic plan to simplify Yahoo, narrowing our focus on areas of strength to fuel growth, drive revenue, and increase efficiency in 2016 and beyond. Yahoo will simplify its product portfolio to emphasize the products that distinguish the Company competitively and drive the most substantial portion of our users, revenue and market opportunities. For users, we will focus on three global platforms: Search, Mail and Tumblr, and four verticals: News, Sports, Finance and Lifestyle. For advertisers, we will focus on two core offerings: Yahoo Gemini and BrightRoll. Gemini combines our search and native ad offerings, while BrightRoll offers programmatic buying and selling tools for video, display and native advertising.

The goals of the strategic plan are:

User Offerings

Yahoo is focused on informing, connecting, and entertaining our users with our search (Yahoo Search), communications (including Yahoo Mail and Yahoo Messenger), and digital content products (including Tumblr, and our 4 core verticals: Yahoo News, Yahoo Sports, Yahoo Finance, and Yahoo Lifestyle).

Our user offerings include:

Search

Yahoo Search serves as a guide for users to discover the information on the Internet that matters to them the most. In 2015, Yahoo launched a new personalized search experience on mobile, offering rich results from the web and, if signed in, personalized contextual results surfaced from a user’s email, contacts, and calendar. The new Yahoo mobile search experience helps users find and take action on all of the information they are looking for on the go. We plan to continue investing in a differentiated mobile search experience by allocating additional resources to develop new search technology through our Yahoo Gemini platform that surfaces personalized results for the user and anticipates the users’ needs.

Under our Search and Advertising Services and Sales Agreement (“Search Agreement”) with Microsoft Corporation (“Microsoft”), Microsoft provides algorithmic and paid search advertising services on a non-exclusive basis for Yahoo Properties on mobile, desktop, and Affiliate sites. This

agreement is subject to a volume commitment by the Company to request paid search results from Microsoft for 51 percent of its search queries originating from desktop computers accessing Yahoo Properties and its Affiliate sites and to display only Microsoft’s paid search results on such search result pages. In October 2015, Yahoo entered into the Google Services Agreement (the “Services Agreement”) with Google Inc. (“Google”) that provides Yahoo with additional flexibility to choose among suppliers of search results and ads. Google’s offerings complement the search services provided by Microsoft and Yahoo Gemini (Yahoo’s platform for search and native advertising). See “Advertiser Products” and “Advertising Formats” below for further information about our Yahoo Gemini platform. Yahoo continues to develop and launch features around the results to enhance the search experience for our users.

Communications

Yahoo Mail is a primary driver of engagement across our user offerings. Yahoo Mail connects users to the people and content most important to them across mobile and desktop. We support connecting external mail providers (such as Gmail, AOL, and Outlook) for users to manage multiple accounts from the Yahoo Mail client. Each Yahoo Mail account comes with one terabyte of free storage and is integrated with contacts, calendar, and messaging (see Yahoo Messenger section below). Our newly redesigned mobile app has new user-centric features including account key, compose assistant, document preview, and smart contacts. In 2016, we plan to invest in Yahoo Mail to grow DAUs and increase engagement by improving speed and stability, as well as adding features that make it easier for users to share, search, and connect through the platform.

Yahoo Messenger,our completely redesigned instant messaging service, provides an interactive and personalized way for users to connect, communicate, and share experiences in real-time. It incorporates many of our existing platforms including Tumblr and Xobni, with features like GIF search, “hearting” messages, and unsend. Yahoo Messenger is available as a mobile app, on the web, and also integrated directly into Yahoo Mail on desktop to drive deeper engagement with users.

Digital Content

Our Digital Content offerings include: Tumblr, our global social platform, and our four core verticals: News, Sports, Finance, and Lifestyle. Our Digital Content is available on mobile or desktop.

Yahoo News, which can be accessed through the Yahoo App and the Yahoo homepage atYahoo.com, gives users access todiscover,consume, and engage around the news, content, and video they care about all in one place. We continue to provide current and trending news and information from Yahoo original editorial and partner content. Yahoo News is optimized to provide a consistent, easy-to-use content discovery experience across mobile and desktop with breaking news, local weather, a personalized content stream, and social sharing capabilities.

Yahoo Sportsserves one of the largest audiences of sports enthusiasts in the world and delivers experiences for every fan, every day. Yahoo Sports provides users access to Fantasy Sports.

Yahoo Finance provides a comprehensive set of financial data, information, and tools that helps users make informed financial decisions. The robust content on Yahoo Finance is a mix of Yahoo original editorial and syndicated news via relationships with several third-party partners.

Yahoo Lifestylewill bring together content, commerce, and community to engage users passionate about style and fashion. We are working on creating a Yahoo Lifestyle vertical that features Yahoo’s original editorial voice to deliver authoritative and authentic style and beauty content. As we continue to integrate Polyvore, Inc. (“Polyvore”), a business we acquired in September 2015, into Yahoo Lifestyle, users will have access to discover and publish their own style trends, and to buy items featured in articles and sets through direct integration with commerce sites.

Tumblroffers a web platform and mobile applications on iOS and Android that allow users to create, share, and curate content. Tumblr messaging enables users to engage with other users that share their same interests and passions.

Advertiser Offerings

Yahoo has two core advertiser products: Gemini and BrightRoll, which includes the BrightRoll Demand Side Platform and BrightRoll Exchange. Advertisers benefit from our comprehensive approach to digital advertising across search and display advertising, which includes native, video, premium, and audience ads. Gemini and BrightRoll are supported by Yahoo’s technology platform, data, and analytical tools.

Advertiser Products

Yahoo Gemini is Yahoo’s proprietary marketplace for search and native advertising across devices. Yahoo Gemini helps marketers achieve measurable results with intent-driven advertising. By leveraging Yahoo’s proprietary data, Gemini helps advertisers target the audiences they are interested in reaching across Yahoo Properties and third-party publishers and engage those audiences through search and native ads. Gemini search is focused on helping advertisers reach their target audiences at the moment the user has made a relevant search query. Gemini native ads are built to match the content that a user is exploring. By using the surrounding content to establish relevancy for targeting, Gemini native ads drive higher audience engagement and brand awareness for the advertiser.

BrightRoll is Yahoo’s unified brand for programmatic advertising technology, offering a suite of media-agnostic tools to help advertisers, publishers, and partners connect with users across ad formats and devices.BrightRoll Demand Side Platform (“BrightRoll DSP”) is technology that enables brand and performance advertisers to plan, execute, optimize, and measure programmatic digital advertising campaigns. Our targeting solutions allow advertisers to reach users across Yahoo, exclusive publishing partners, and a wide variety of sites and mobile apps with the scale and efficiency of programmatic buying. BrightRoll DSP offers advertisers greater control and transparency with advanced programmatic buying capabilities and access to Yahoo’s proprietary data. Advertisers can reach the right people with custom audience definition and manage frequency on any device with independent campaign measurement and insights.BrightRoll Exchange connects programmatic, native, and video inventory from the top publishers and ad exchanges with demand from the top DSPs, agencies, ad networks, and advertisers. The BrightRoll Exchange delivers revenue to publishers with the goal of maximizing yield and offers buyers access to a variety of premium digital advertising inventory and unique data with the goal of enabling them to efficiently value supply.

Advertising Formats

Search Advertising.

Yahoo Gemini connects advertisers with the audiences across our network, with the support of strategic account teams, reporting, analytics, and extensive campaign controls. Yahoo continues to

focus on developing new search ad formats, features, and capabilities to engage users and optimize performance across devices, including click-to-call functionality, sitelink extensions, location extensions, and product ads. To provide the richest possible experience for our users, Yahoo also serves search ads from partners, including Microsoft and Google.

Display Advertising.

Native Advertising.Yahoo native ads are a seamless part of a user’s experience on Yahoo sites across devices, as well as third-party partner publisher sites and mobile apps. This natural integration helps advertisers connect with people in a compelling and impactful way, driving awareness and performance, especially on mobile where native ads are the predominant ad format. Yahoo native ads are visually rich and come in a variety of formats, like text, image, and video that deliver measurable branding and sales results. Yahoo offers native ads through Yahoo Gemini and the BrightRoll DSP.

Video Advertising.    Yahoo video ads enable brands to align with premium, contextually relevant video programming across our properties. In addition, we leverage Yahoo’s unique user data to connect brands to their target audiences at scale across devices.

Premium Advertising.    Yahoo premium ads offer a unique and engaging canvas for brand storytelling. We offer high-impact advertising opportunities on Yahoo.com, Yahoo Mail, and program sponsorships of major events. Brands have the ability to anchor buys within premium content and scale programmatically, while applying unique data strategies to reach their target audience.

Audience Advertising.    Yahoo audience ads leverage a comprehensive set of proprietary data signals to identify and engage the right users on Yahoo and across the web. With audience ads, Yahoo can help brands make meaningful connections with the right users at the right time, across ad formats and devices.

Developer Offerings

The Yahoo Mobile Developer Suite gives developers the ability to measure, monetize, advertise, and improve their apps with Yahoo tools.

Flurry Analytics is a free mobile app analytics solution that is implemented in applications on more than 2 billion devices worldwide. Flurry is integrated in third-party applications via a lightweight software developer kit (“SDK”). Flurry provides mobile app developers insight into the action their users are taking in-app, as well as their audience’s interests and demographics.

Yahoo App Publishing (“YAP”) enables third-party app developers to monetize their app experiences with Yahoo Gemini and BrightRoll powered native, video and display ads. Developers can integrate YAP through the Flurry SDK.

Yahoo App Marketing gives third-party app developers the ability to advertise their apps through targeted native and video advertising on Yahoo, Tumblr, and across our app network. Yahoo App Marketing ads are powered by Yahoo Gemini and priced on a cost-per-click basis.

Tumblr In-App Sharing allows developers to integrate a Tumblr sharing button into their app experiences to enable their users to share content directly to Tumblr without leaving their app. The resulting content post on Tumblr has a deep-link back to the originating app, and if the Tumblr user does not have that app, they will see a prompt to install it.

Product Development

Yahoo continually launches, improves, and scales products and features to meet evolving user, advertiser, and publisher needs. Most of our software products and features are developed internally.

In some instances, however, we might purchase technology and license intellectual property rights if the opportunity is strategically aligned, operationally compatible, and economically advantageous. While it may be necessary in the future to seek or renew licenses relating to various aspects of our products, we believe based on past experience and industry practice that such licenses generally could be obtained on commercially-reasonable terms. We believe our continuing innovation and product development are not materially dependent upon any single license or other agreement with a third-party relating to the development of our products.

Yahoo’s product teams, which include a broad array of engineering and product talent, support a large portion of the Yahoo product portfolio and technology infrastructure. Our product teams have expertise in web and mobile user applications, scalable software platforms, information retrieval, machine learning and science, editorial, networking/communications technologies, and presentation layer frameworks. We take security and privacy very seriously, and continuously innovate to protect our users and their data.

Our engineering and production teams are primarily located in our Sunnyvale, California, headquarters. Product development expenses for 2013, 2014, and 2015 totaled approximately $958 million, $1,156 million, and $1,178 million, respectively, which included stock-based compensation expense of $83 million, $139 million, and $190 million, respectively.

M&A Activity

As part of our overall strategy, we evaluate and pursue potential acquisitions based on talent and technology to help accelerate our growth in mobile, video, native, or social. In 2015, we completed 2 acquisitions, the purpose of which was to enhance our technology and core product offerings, grow our talent base, and expand audience and engagement. We may make additional acquisitions and strategic investments in the future that align with our growth strategy.

Global Operations

We manage our business geographically. The primary areas of measurement and decision-making are Americas, EMEA (Europe, Middle East, and Africa), and Asia Pacific. Additional information required by this item is incorporated herein by reference to Note 18—“Segments” of the Notes to our consolidated financial statements, which appears in Part II, Item 8 of this Annual Report on Form 10-K.

We own a majority or 100 percent of all of these international operations (except in Australia, New Zealand, and Japan where we have joint ventures and/or noncontrolling interests). We support these businesses through a network of offices worldwide.

Revenue is primarily attributed to individual countries according to the international online property that generated the revenue.

Information regarding risks involving our international operations is included in Part I, Item 1A “Risk Factors” of this Annual Report on Form 10-K and is incorporated herein by reference.

Sales

We sell our advertising services through three primary channels: field, mid-market, and reseller/small business. Our field advertising sales team sells display advertising in all markets and search advertising to both premium and non-premium advertisers using Yahoo Gemini. Previously under the Search Agreement, Yahoo had sales exclusivity for both the Company’s and Microsoft’s premium

advertisers. Pursuant to the current terms of the Search Agreement, as amended on April 15, 2015 by the Eleventh Amendment to the Search Agreement (the “Eleventh Amendment”), this sales exclusivity terminated on July 1, 2015. The Company and Microsoft have been transitioning premium advertisers for Microsoft’s paid search services to Microsoft on a market-by-market basis. As of February 26, 2016, such transition was substantially complete for most markets in North America and Europe, and the parties are cooperating on transitioning the remaining markets. Our mid-market channel sells our advertising services to medium-sized businesses, while our reseller/small business channel allows us to sell advertising services to additional regional and small business advertisers. Our U.S. sales force is structured vertically allowing us to offer customers integrated customer-centric solutions. We believe this approach allows us to provide the best solutions across all of our products based on a deeper understanding of our customers’ businesses.

In the U.S., we employ sales professionals in multiple locations, including Atlanta, Boston, Chicago, Dallas, Detroit, Hillsboro, the Los Angeles area, Miami, New York, Omaha, San Francisco, and Sunnyvale as of December 31, 2015. In international markets, we either have our own internal sales professionals or rely on our established sales agency relationships in 35 countries, regions, and territories as of December 31, 2015.

Revenue under the Search Agreement represented approximately 31 percent, 35 percent, and 35 percent of our revenue for the years ended December 31, 2013, 2014 and, 2015, respectively, and no other individual customer represented more than 10 percent of our revenue in 2013, 2014, or 2015.

Internet usage is subject to seasonal fluctuations, typically declining during customary summer vacation periods and increasing during the fourth quarter holiday period due to higher online retail activity. These seasonal patterns have affected, and we expect will continue to affect, our business and quarterly sequential revenue growth rates.

Marketing

Yahoo is one of the most recognized brands in the world. Our products, services, and content enable us to attract, retain, and engage users, advertisers, and publishers. Our marketing team will help shape our offerings to better market them to our potential and existing users.

Competition

Our industry is characterized by rapid evolution and innovation through disruptive technologies. We face significant competition from a wide range of businesses, particularly companies that seek to connect people with digital content and with each other. We compete on a global scale for audience share, marketers, and talent. Our competition includes:

As we introduce new products and our existing products evolve, we may become subject to additional competition.

We believe our principal competitive strengths relating to attracting users include the usefulness, accessibility, integration, and personalization of the online services that we offer; the quality, personalization, and presentation of our search results; and the overall user experience on our premium properties. Our principal competitive strengths relating to attracting advertisers and publishers are the reach, effectiveness, and efficiency of our marketing services as well as the creativity of the marketing solutions that we offer.

Additional information regarding competition is included in Part I, Item 1A “Risk Factors” of this Annual Report on Form 10-K and is incorporated herein by reference.

Intellectual Property

We create, own, and maintain a wide array of intellectual property assets that we believe are among our most valuable assets. Our intellectual property assets include patents and patent applications related to our innovations, products and services; trademarks related to our brands, products and services; copyrights in software and creative content; trade secrets; and other intellectual property rights and licenses of various kinds. We seek to protect our intellectual property assets through patents, copyrights, trade secrets, trademarks and laws of the U.S. and other countries, and through contractual provisions. We enter into confidentiality and invention assignment agreements with our employees and contractors, and utilize non-disclosure agreements with third parties with whom we conduct business in order to secure and protect our proprietary rights and to limit access to, and disclosure of, our proprietary information. We consider the Yahoo! trademark and our many related company brands to be among our most valuable assets, and we have registered these trademarks in the U.S. and other countries throughout the world and actively seek to protect them. We have licensed in the past, and expect that we may license in the future, certain of our technology and proprietary rights, such as trademark, patent, copyright, and trade secret rights, to third parties.

Additional information regarding certain risks related to our intellectual property is included in Part I, Item 1A “Risk Factors” of this Annual Report on Form 10-K and is incorporated herein by reference.

Employees

As of December 31, 2015, we had approximately 10,400 full-time employees and 860 contractors. In February 2016, we announced plans to reduce our workforce by approximately 15 percent by the end of 2016. Our future success is substantially dependent on the performance of our senior management and key technical personnel, as well as our continuing ability to attract, maintain the caliber of, and retain highly qualified technical, executive, and managerial personnel. We remain committed to our talented employees and providing the best possible workplace culture for them. Additional information regarding certain risks related to our employees is included in Part I, Item 1A “Risk Factors” of this Annual Report on Form 10-K and is incorporated herein by reference.

Available Information

Our website is located at https://www.yahoo.com. Our investor relations website is located at https://investor.yahoo.net. We make available free of charge on our investor relations website under “Financial Info” our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and any amendments to those reports as soon as reasonably practicable after we electronically file or furnish such materials to the U.S. Securities and Exchange Commission (“SEC”). The, information is sometimes “incorporated by reference.” This means that we refer you to information previously filed with the SEC maintains a website that contains reports, proxy and information statements, and other information regarding our filings at http://www.sec.gov.

Item 1A. Risk Factors

We face significant competition for users, advertisers, publishers, developers, and distributors.

We face significant competition from online search engines, sites offering integrated internet products and services, social media and networking sites, ecommerce sites, companies providing analytics, monetization and marketing tools for mobile and desktop developers, and digital, broadcast and print media. In a number of international markets, especially those in Asia, Europe, the Middle East and Latin America, we face substantial competition from local Internet service providers and other entities that offer search, communications, and other commercial services.

Several of our competitors offer an integrated variety of Internet products, advertising services, technologies, online services and content in a manner similar to Yahoo. We compete against these and other companies to attract and retain users, advertisers, developers, and third-party website publishersshould be considered as participants in our Affiliate network, and to obtain agreements with third parties to promote or distribute our services. We also compete with social media and networking sites which are increasingly used to communicate and share information, and which are attracting a substantial and increasing share of users, users’ online time, and online advertising dollars.

A key element of our strategy is focusing on increasing our revenue growth through our Mavens offerings. As part of the particular filing. As provided under SEC regulations, the Compensation Committee Report contained in this strategy, we are focusing on mobile products and mobile advertising formats, as well as increasing our revenue from mobile. A number of our competitors have devoted significant resources to the development of products, services and apps for mobile devices. Several of our competitors have mobile revenue significantly greater than ours. If we are unable to develop products for mobile devices that users find engaging and that help us grow our mobile revenue, our competitive position, our financial condition and operating results could be harmed.

In addition, a number of competitors offer products, services and apps that directly compete for users with our offerings, including e-mail, search, video, social, sports, news, finance, micro-blogging, and messaging. Similarly, our competitors orAmendment specifically is not incorporated by reference into any other participants in the online advertising marketplace

offer advertising exchanges, ad networks, demand side platforms, ad serving technologies, sponsored search offerings, and other services that directly compete for advertisers with our offerings. Additionally, as the use of programmatic advertising continues to increase, we compete with companies that have also invested in programmatic platform offerings. We also compete with traditional print and broadcast media companies to attract domestic and international advertising spending. Some of our existing competitors and possible entrants have greater brand recognition for certain products, services and apps, more expertise in particular market segments, and greater operational, strategic, technological, financial, personnel, or other resources than we do. Many of our competitors have access to considerable financial and technical resources with which to compete aggressively, including by funding future growth and expansion and investing in acquisitions, technologies, and research and development. Further, emerging start-ups may be able to innovate and provide new products, services and apps faster than we can. In addition, competitors may consolidate or collaborate with each other, and new competitors may enter the market. Some of our competitors in international markets have a substantial competitive advantage over us because they have dominant market share in their territories, have greater local brand recognition, are focused on a single market, are more familiar with local tastes and preferences, or have greater regulatory and operational flexibility due to the fact that we may be subject to both U.S. and foreign regulatory requirements.

If our competitors are more successful than we are in developing and deploying compelling products or in attracting and retaining users, advertisers, publishers, developers, or distributors, our revenue and growth rates could decline.

We generate the majority of our revenue from search and display advertising, and the reduction in spending by or loss of current or potential advertisers would cause our revenue and operating results to decline.

For the twelve months ended December 31, 2015, 84 percent of our total revenue came from search and display advertising. Our ability to retain and grow search and display revenue depends upon:

In most cases, our agreements with advertisers have a term of one year or less, and may be terminated at any time by the advertiser or by us. Payments under our agreements with advertisers are often dependent upon performance and click-through levels. Accordingly, it is difficult to forecast search and display revenue accurately. In addition, our expense levels are based in part on expectations of future revenue, including any guaranteed minimum payments to our Affiliates in connection with search and/or display advertising, and in some cases, the expenses could exceed the revenue that we generate. The state of the global economy, growth rate of the online advertising market, and availability of capital impacts the advertising spending patterns of our existing and potential advertisers. Any reduction in spending by, or loss of, existing or potential advertisers would negatively impact our revenue and operating results. Further, we may be unable to adjust our expenses and capital expenditures quickly enough to compensate for any unexpected revenue shortfall.

As more people access our products via mobile devices rather than PCs and mobile advertising continues to evolve, if we do not continue to attract and retain mobile users and grow mobile revenue, our financial results will be adversely impacted.

The number of people who access the Internet through mobile devices rather than a PC, including mobile telephones, smartphones and tablets, is increasing and will likely continue to increase dramatically. More than 600 million of our monthly users are now joining us (including Tumblr) on mobile devices. In addition, search queries are increasingly being undertaken through mobile devices. As a result, our ability to grow advertising revenue is increasingly dependent on our ability to generate revenue from ads displayed on mobile devices.

A key element of our strategy is focusing on mobile devices, and we expect to continue to devote significant resources to the creation and support of developing new and innovative mobile products, services and apps.However, if our new mobile products, services and apps, including new forms of Internet advertising for mobile devices, do not continue to attract and retain mobile users, advertisers and device manufacturers and to generate and grow mobile revenue, our operating and financial results will be adversely impacted. We are dependent on the interoperability of our products and services with mobile operating systems we do not control and we may not be successful in maintaining relationshipsfilings with the key participants in the mobile industry that control such mobile operating systems. The manufacturer or access provider might promote a competitor’s or its own products and services, impair users’ access to our services by blocking access through their devices, make it hard for users to readily discover, install, update or access our products on their devices, or charge us for delivery of ads, or limit our ability to deliver ads or measure their effectiveness. If distributors impair access to or refuse to distribute our services or apps, or charge for or limit our ability to deliver ads or measure the effectiveness of our ads, then our user engagement and revenue could decline.

If we do not manage our operating expenses effectively, our profitability could fail to improve and could decline.

We have implemented cost reduction initiatives to reduce our operating expenses, including reducing our headcount, closing offices and exiting certain products and verticals. However, we may not realize the cost savings expected from these initiatives or the revenue impact from our exit of certain regions and products may be greater than we expect. We plan to seek to operate efficiently

and to manage our costs effectively. However, we are also investing in areas we believe will grow revenue and our operating expenses might increase as a result of these investments. If our operating expenses increase at a greater pace than our revenue grows, or if we fail to manage costs effectively, our profitability could fail to improve and could decline.

There can be no assurance that our exploration of strategic alternatives will result in any transaction being consummated, and speculation and uncertainty regarding the outcome of our exploration of strategic alternatives may adversely impact our business.

In parallel with executing our strategic plan, we are exploring strategic alternatives, including transactions to separate our remaining stake in Alibaba Group from our operating business focusing on a reverse spin transaction, as well as exploring strategic proposals for the operating business. Our Board has formed a Strategic Review Committee of independent directors to lead this process. There can be no assurance that any transaction will be consummated, and the process of exploring strategic alternatives will involve the dedication of significant resources and the incurrence of significant costs and expenses. In addition, speculation and uncertainty regarding our exploration of strategic alternatives may cause or result in:

If we are unable to mitigate these or other potential risks related to the uncertainty caused by our exploration of strategic alternatives, it may disrupt our business or adversely impact our revenue, operating results, and financial condition.

Risks associated with our Search Agreement with Microsoft may adversely affect our business and operating results.

Under our Search Agreement with Microsoft, Microsoft was the exclusive provider of algorithmic and paid search services for Yahoo Properties and Affiliate sites on personal computers and the non-exclusive provider of such services on mobile devices. As of April 15, 2015, Microsoft became the non-exclusive provider of such services on all devices. Commencing on May 1, 2015, the Company is required to request paid search results from Microsoft for 51 percent of its search queries originating from personal computers accessing Yahoo Properties and its Affiliate sites (the “Volume Commitment”) and will display only Microsoft’s paid search results on such search result pages. Approximately 35 percent, 35 percent, and 31 percent of our revenue for 2015, 2014 and 2013, respectively, were attributable to the Search Agreement. Our business and operating results would be adversely affected by a significant decline in or loss of this revenue if we are not able to successfully replace this revenue with revenue from search results displayed through our Yahoo Gemini platform or our Services Agreement with Google.

As a result of the Volume Commitment, we continue to be dependent on Microsoft continuing to invest and innovate to maintain and improve its algorithmic and paid search services and to be

competitive with other search providers. If Microsoft fails to do this, our revenue and profitability could decline and our ability to maintain and expand our relationships with Affiliates for search and paid search advertising could be negatively impacted. Further, our competitors may continue to increase revenue, profitability, and market share at a higher rate than we do.

The term of the Search Agreement is 10 years from its commencement date, February 23, 2010, subject to earlier termination as provided in the Search Agreement. On or after October 1, 2015, either the Company or Microsoft may terminate the Search Agreement by delivering a written notice of termination to the other party. The Search Agreement will remain in effect for four months from the date of a termination notice to provide for a transition period. If Microsoft terminated the Search Agreement and the Company was unable to rely on its own services or the Services Agreement with Google, the termination could have an adverse impact on our business, revenue and operating results.

Risks associated with our Services Agreement with Google may adversely affect our business and operating results.

Under our Services Agreement with Google, Google will provide us with search advertisements through Google’s AdSense for Search service (“AFS”), web algorithmic search services through Google’s Websearch Service, and image search services. We entered into the Services Agreement with Google in the fourth quarter of 2015. We expect that our revenues under the Services Agreement with Google will increase in 2016. In addition, if Microsoft were to terminate its Search Agreement with us, we would be required to rely on the Services Agreement and our Yahoo Gemini platform to replace the search revenue we currently receive under the Search Agreement.

We are dependent on Google continuing to invest and innovate to maintain and improve its algorithmic and paid search services and to be competitive with other search providers. If Google fails to do this, our revenue and profitability could decline. Further, Google has a number of termination rights under the Services Agreement. If Google terminated the Services Agreement and we were unable to rely on our Yahoo Gemini platform or the Search Agreement with Microsoft, the termination could have an adverse impact on our business, revenue and operating results.

If we are unable to provide innovative search experiences and other products and services that differentiate our services and generate significant traffic to our websites, our business could be harmed, causing our revenue to decline.

Internet search is characterized by rapidly changing technology, significant competition, evolving industry standards, and frequent product and service enhancements. Although we have agreements with Microsoft and Google to use their paid search platforms, we still need to continue to invest in our Yahoo Gemini search platform and to innovate to improve our users’ search experience (especially on mobile) to continue to differentiate our services and attract, retain, and expand our user base and paid search advertiser base. We also generate revenue through other online products, services and apps, and continue to innovate the products, services and apps in our portfolio. The research and development of new, technologically advanced products is a complex process that requires significant levels of innovation and investment, as well as accurate anticipation of technology, market and consumer trends.

If we are unable to provide innovative search experiences and other products and services which differentiate our services, gain user acceptance and generate significant traffic to our websites, or if we are unable to effectively monetize the traffic from such products and services, our business could be harmed, causing our revenue to decline.

Our business depends on a strong brand, and failing to maintain or enhance the Yahoo brands in a cost-effective manner could harm our operating results.

Maintaining and enhancing our brands is an important aspect of our efforts to attract and expand our user, advertiser, and Affiliate base. We believe that the importance of brand recognition will increase due to the relatively low barriers to entry in certain portions of the Internet market. Maintaining and enhancing our brands will depend largely on our ability to provide high-quality, innovative products, and services, which we might not do successfully. We have spent and expect to spend considerable money and resources on the establishment and maintenance of our brands, as well as advertising, marketing, and other brand-building efforts to preserve and enhance consumer awareness of our brands. Our brands may be negatively impacted by a number of factors such as service outages, product malfunctions, data protection and security issues, exploitation of our trademarks by others without permission, and poor presentation or integration of our search marketing offerings by Affiliates on their sites or in their software and services.

Further, while we attempt to ensure that the quality of our brands is maintained by our licensees, our licensees might take actions that could impair the value of our brands, our proprietary rights, or the reputation of our products and media properties. If we are unable to maintain or enhance our brands in a cost-effective manner, or if we incur excessive expenses in these efforts, our business, operating results and financial condition could be harmed.

Changes in regulations or user concerns regarding privacy and protection of user data, or any failure to comply with such laws, could adversely affect our business.

Federal, state, and international laws and regulations govern the collection, use, retention, disclosure, sharing and security of data that we receive from and about our users. The use of consumer data by online service providers and advertising networks is a topic of active interest among federal, state, and international regulatory bodies, and the regulatory environment is unsettled. Many states have passed laws requiring notification to users where there is a security breach for personal data, such as California’s Information Practices Act. We face similar risks in international markets where our products, services and apps are offered. Any failure, or perceived failure, by us to comply with or make effective modifications to our policies, or to comply with any federal, state, or international privacy, data-retention or data-protection-related laws, regulations, orders or industry self-regulatory principles could result in proceedings or actions against us by governmental entities or others, a loss of user confidence, damage to the Yahoo brands, and a loss of users, advertising partners, or Affiliates, any of which could potentially have an adverse effect on our business.

In addition, various federal, state and foreign legislative or regulatory bodies may enact new or additional laws and regulations concerning privacy, data retention, data transfer and data protection issues, including laws or regulations mandating disclosure to domestic or international law enforcement bodies, which could adversely impact our business, our brand or our reputation with users. For example, some countries are considering or have enacted laws mandating that user data regarding users in their country be maintained in their country. Having to maintain local data centers in individual countries could increase our operating costs significantly. In addition, there currently is a data protection regulation pending final approval by the European Union that may include operational requirements for companies that receive or process personal data that are different than those currently in place in the European Union, and that may also include significant penalties for non-compliance.

The European Court of Justice’s recent invalidation of the European Commission’s 2000 Safe Harbor Decision has created uncertainty around certain international transfers of data from the European Union to the U.S. A preliminary agreement has been reached between the U.S. and European Union

governments to allow for certainty regarding transfers of data. However, given the preliminary nature of the agreement, some uncertainty remains, and compliance obligations could cause us to incur additional costs, require us to change business practices in a manner adverse to our business, or affect the manner in which we provide our services.

The interpretation and application of privacy, data protection, data transfer and data retention laws and regulations are often uncertain and in flux in the U.S. and internationally. These laws may be interpreted and applied inconsistently from country to country and inconsistently with our current policies and practices, complicating long-range business planning decisions. If privacy, data protection, data transfer or data retention laws are interpreted and applied in a manner that is inconsistent with our current policies and practices we may be fined or ordered to change our business practices in a manner that adversely impacts our operating results. Complying with these varying international requirements could cause us to incur substantial costs or require us to change our business practices in a manner adverse to our business and operating results.

If our security measures are breached, our products and services may be perceived as not being secure, users and customers may curtail or stop using our products and services, and we may incur significant legal and financial exposure.

Our products and services involve the storage and transmission of Yahoo’s users’ and customers’ personal and proprietary information in our facilities and on our equipment, networks and corporate systems. Security breaches expose us to a risk of loss of this information, litigation, remediation costs, increased costs for security measures, loss of revenue, damage to our reputation, and potential liability. Outside parties may attempt to fraudulently induce employees, users, or customers to disclose sensitive information to gain access to our data or our users’ or customers’ data. In addition, hardware, software or applications we procure from third parties may contain defects in design or manufacture or other problems that could unexpectedly compromise network and data security. Additionally, some third parties, such as our distribution partners, service providers and vendors, and app developers, may receive or store information provided by us or by our users through applications integrated with Yahoo. If these third parties fail to adopt or adhere to adequate data security practices, or in the event of a breach of their networks, our data or our users’ data may be improperly accessed, used or disclosed. Security breaches or unauthorized access have resulted in and may in the future result in a combination of significant legal and financial exposure, increased remediation and other costs, damage to our reputation and a loss of confidence in the security of our products, services and networks that could have an adverse effect on our business. We take steps to prevent unauthorized access to our corporate systems, however, because the techniques used to obtain unauthorized access, disable or degrade service, or sabotage systems change frequently or may be designed to remain dormant until a triggering event, we may be unable to anticipate these techniques or implement adequate preventative measures. If an actual or perceived breach of our security occurs, the market perception of the effectiveness of our security measures could be harmed and we could lose users and customers.

If we are unable to attract, sustain, and renew distribution arrangements on favorable terms, our revenue may decline.

We enter into distribution arrangements with third parties to promote or supply our services to their users. For example:

In some markets, we depend on a limited number of distribution arrangements for a significant percentage of our user activity. A failure by our distributors to attract or retain their user bases would negatively impact our user activity and, in turn, reduce our revenue. For mobile app distribution, we depend on a limited number of distributors, primarily the developers of the operating systems or device manufacturers. If we are unable to reach agreements with these distributors for distribution of our mobile apps or they refuse to distribute or block our mobile apps, our operating results will be harmed. In the future, as new methods for accessing the Internet and our services become available, including through alternative devices, we may need to enter into amended distribution agreements with existing access providers, distributors, and manufacturers to cover the new devices and new arrangements. We face a risk that existing and potential new access providers, distributors, and manufacturers may decide not to offer distribution of our services on reasonable terms, or at all.

Distribution agreements often involve revenue sharing. Competition to enter into distribution arrangements has caused and may in the future cause our traffic acquisition costs to increase. In some cases, we guarantee distributors a minimum level of revenue and, as a result, run a risk that the distributors’ performance (in terms of ad impressions, toolbar installations, etc.) might not be sufficient to otherwise earn their minimum payments, in which case our payments could exceed the revenue that we receive. In other cases, we agree that if the distributor does not realize specified minimum revenue we will adjust the distributor’s revenue-share percentage or provide make-whole arrangements.

Some of our distribution agreements are not exclusive, have a short term, are terminable at will, or are subject to early termination provisions. The loss of distributors, increased distribution costs, or the renewal of distribution agreements on significantly less favorable terms may cause our revenue to decline.

If we are unable to license, acquire, create or aggregate compelling content and services at reasonable cost, or receive compelling content, the number of users of our services may not grow as anticipated, or may decline, or users’ level of engagement with our services may decline, all of which could harm our operating results.

Our future success depends in part on our ability to aggregate compelling content and deliver that content through our online properties. We license from third parties much of the content and services on our online properties, such as news, stock quotes, weather, sports, video, and photos. In addition, our users also contribute content to us. We believe that users will increasingly demand high-quality content and services. We may need to make substantial payments to third parties from whom we license or acquire such content or services. Our ability to maintain and build relationships with such third-party providers is critical to our success. In addition, as users increasingly access the Internet via mobile and other alternative devices, we may need to enter into amended agreements with existing third-party providers to cover new devices. We may be unable to enter into new, or preserve existing, relationships with the third-parties whose content or services we seek to obtain. In addition, as competition for compelling content increases both domestically and internationally, our third-party providers may increase the prices at which they offer their content and services to us, stop offering their content or services to us, or offer their content and services on terms that are not agreeable to us. An increase in the prices charged to us by third-party providers could harm our operating results and financial condition. Further, because many of our licenses for our content and services with third parties are non-exclusive, other media providers may be able to offer similar or identical content. This increases the importance of our ability to deliver compelling editorial content and personalization of this content for users in order to differentiate Yahoo from other businesses. If

we are unable to license or acquire compelling content at reasonable cost, if other companies distribute content or services that are similar to or the same as that provided by us, or if we do not receive compelling content from our users, the number of users of our services may not grow as anticipated, or may decline, users’ level of engagement with our services may decline, clicks on our ads may decrease, or advertisers may reduce future purchases of our ads, all or any of which could harm our operating results.

Interruptions, delays, or failures in the provision of our services could damage our reputation and harm our operating results.

Delays or disruptions to our service, or the loss or compromise of data, could result from a variety of causes, including the following:

Prolonged delays or disruptions to our service could result in a loss of users, damage to our brands, legal costs or liability, and harm to our operating results.

Technologies, tools, software, and applications could block our advertisements, impair our ability to deliver interest-based advertising, or shift the location in which advertising appears, which could harm our operating results.

Technologies, tools, software, and applications (including new and enhanced browsers) have been developed and are likely to continue to be developed that can block or allow users to opt out of display, search, and interest-based advertising and content, delete or block the cookies used to

deliver such advertising, or shift the location in which advertising appears on pages so that our advertisements do not show up in the most monetizable places on our pages or are obscured. Most of our revenue is derived from fees paid by advertisers in connection with the display of graphical and non-graphical advertisements or clicks on search advertisements on web pages. As a result, the adoption of such technologies, tools, software, and applications could reduce the number of search and display advertisements that we are able to deliver and/or our ability to deliver interest-based advertising and this, in turn, could reduce our advertising revenue and operating results.

If we are unable to recruit, hire, motivate, and retain key personnel, we may not be able to execute our business plan.

Our business is dependent on our ability to recruit, hire, motivate, and retain talented, highly skilled personnel. Achieving this objective may be difficult due to many factors, including the intense competition for such highly skilled personnel in the San Francisco Bay Area and other metropolitan areas where our offices are located; uncertainty due to our exploration of strategic alternatives, our new strategic plan and announced reduction in our workforce; competitors’ hiring practices; the effectiveness of our compensation programs; and fluctuations in global economic and industry conditions. If we do not succeed in retaining and motivating our existing key employees, and in attracting new key personnel, we may be unable to meet our business plan and as a result, our revenue and profitability may decline.

We are regularly involved in claims, suits, government investigations, and other proceedings that may result in adverse outcomes.

We are regularly involved in claims, suits, government investigations, and proceedings arising from the ordinary course of our business, including actions with respect to intellectual property claims, privacy, consumer protection, information security, data protection or law enforcement matters, tax matters, labor and employment claims, commercial claims, as well as actions involving content generated by our users, stockholder derivative actions, purported class action and class action lawsuits, and other matters. Such claims, suits, government investigations, and proceedings are inherently uncertain and their results cannot be predicted with certainty. Regardless of the outcome, such legal proceedings can have an adverse impact on us because of legal costs, diversion of management and other personnel, and other factors. In addition, it is possible that a resolution of one or more such proceedings could result in reputational harm, liability, penalties, or sanctions, as well as judgments, consent decrees, or orders preventing us from offering certain features, functionalities, products, or services, or requiring a change in our business practices, products or technologies, which could in the future materially and adversely affect our business, operating results, and financial condition. See Note 12—“Commitments and Contingencies” in the Notes to our consolidated financial statements.

Our intellectual property rights are valuable, and any failure or inability to sufficiently protect them could harm our business and our operating results.

We create, own, and maintain a wide array of copyrights, patents, trademarks, trade dress, trade secrets, rights to domain names and other intellectual property assets which we believe are collectively among our most valuable assets. We seek to protect our intellectual property assets through patent, copyright, trade secret, trademark, and other laws of the U.S. and other countries of the world, and through contractual provisions. However, the efforts we have taken to protect our intellectual property and proprietary rights might not be sufficient or effective at stopping unauthorized use of those rights. Protection of the distinctive elements of Yahoo might not always be available under copyright law or trademark law, or we might not discover or determine the full extent of any unauthorized use of our copyrights and trademarks in order to protect our rights. In addition,

effective trademark, patent, copyright, and trade secret protection might not be available or cost-effective in every country in which our products and media properties are distributed or made available through the Internet. Changes in patent law, such as changes in the law regarding patentable subject matter, could also impact our ability to obtain patent protection for our innovations. In particular, recent amendments to the U.S. patent law may affect our ability to protect our innovations and defend against claims of patent infringement. Further, given the costs of obtaining patent protection, we might choose not to protect (or not to protect in some jurisdictions) certain innovations that later turn out to be important. There is also a risk that the scope of protection under our patents may not be sufficient in some cases or that existing patents may be deemed invalid or unenforceable. To help maintain our trade secrets, we have entered into confidentiality agreements with most of our employees and contractors, and confidentiality agreements with many of the parties with whom we conduct business, in order to limit access to and disclosure of our proprietary information. If these confidentiality agreements are breached it could compromise our trade secrets and cause us to lose any competitive advantage provided by those trade secrets.

If we are unable to protect our proprietary rights from unauthorized use, the value of our intellectual property assets may be reduced. In addition, protecting our intellectual property and other proprietary rights is expensive and time consuming. Any increase in the unauthorized use of our intellectual property could make it more expensive to do business and consequently harm our operating results.

We are, and may in the future be, subject to intellectual property infringement or other third-party claims, which are costly to defend, could result in significant damage awards, and could limit our ability to provide certain content or use certain technologies in the future.

Internet, technology, media, and patent holding companies often possess a significant number of patents. Further, many of these companies and other parties are actively developing or purchasing search, indexing, electronic commerce, and other Internet-related technologies, as well as a variety of online business models and methods.

We believe that these parties will continue to take steps such as seeking patent protection to protect these technologies. In addition, patent holding companies may continue to seek to monetize patents they have purchased or otherwise obtained. As a result, disputes regarding the ownership of technologies and rights associated with online businesses are likely to continue to arise in the future. From time to time, parties assert patent infringement claims against us. Currently, we are engaged in a number of lawsuits regarding patent issues and have been notified of a number of other potential disputes.

In addition to patent claims, third parties have asserted, and are likely in the future to assert, claims against us alleging infringement of copyrights, trademark rights, trade secret rights or other proprietary rights, or alleging unfair competition, violation of federal or state statutes or other claims, including alleged violation of international statutory and common law. In addition, third parties have made, and may continue to make, infringement and related claims against us over the display of content or search results triggered by search terms, including the display of advertising, that include trademark terms.

As we expand our business and develop new technologies, products and services, we may become increasingly subject to intellectual property infringement and other claims, including those that may arise under international laws. In the event that there is a determination that we have infringed third-party proprietary rights such as patents, copyrights, trademark rights, trade secret rights, or other third-party rights such as publicity and privacy rights, we could incur substantial monetary liability, or

be required to enter into costly royalty or licensing agreements or be prevented from using such rights, which could require us to change our business practices in the future, hinder us from offering certain features, functionalities, products or services, require us to develop non-infringing products or technologies, and limit our ability to compete effectively. We may also incur substantial expenses in defending against third-party claims regardless of the merit of such claims. In addition, many of our agreements with our customers or Affiliates require us to indemnify them for some types of third-party intellectual property infringement claims, which could increase our costs in defending such claims and our damages. Furthermore, such customers and Affiliates may discontinue the use of our products, services, and technologies either as a result of injunctions or otherwise. The occurrence of any of these results could harm our brands or have an adverse effect on our business, financial position, operating results, and cash flows.

We may be required to record a significant charge to earnings if our goodwill, intangible assets, investments in equity interests, or other investments become impaired.

We have previously recorded charges to earnings when our goodwill, intangible assets, investments in equity interests, including investments held by any equity method investee, and other investments became impaired. For example, we recorded a $4.461 billion non-cash goodwill impairment charge during the fourth quarter of 2015. We are required under generally accepted accounting principles to test goodwill for impairment at least annually and to review our intangible assets, investments in equity interests (including investments held by any equity method investee), and our other investments, for impairment when events or changes in circumstance indicate the carrying value may not be recoverable. Factors that could lead to impairment of goodwill, intangible assets (including goodwill or assets acquired via acquisitions) and other investments include significant adverse changes in the business climate and actual or projected operating results (affecting our company as a whole or affecting any particular reporting unit) and declines in the financial condition of our business. Factors that could lead to impairment of investments in equity interests include a prolonged period of decline in the stock price or operating performance of, or an announcement of adverse changes or events by, the companies in which we invested or the investments held by those companies. Factors that could lead to an impairment of U.S. government securities, which constitute a significant portion of our current assets, include any downgrade of U.S. government debt or concern about the creditworthiness of the U.S. government. We may be required in the future to record additional charges to earnings if our goodwill, intangible assets, investments in equity interests, including investments held by any equity method investee, or other investments become impaired. Any such charge would adversely impact our financial results.

Fluctuations in foreign currency exchange rates may adversely affect our operating results and financial condition.

Revenue generated and expenses incurred by our international subsidiaries and any equity method investee are often denominated in the currencies of the local countries. As a result, our consolidated U.S. dollar financial statements are subject to fluctuations due to changes in exchange rates as the financial results of our international subsidiaries and any equity method investee are translated from local currencies into U.S. dollars. Our financial results are also subject to changes in exchange rates that impact the settlement of transactions in non-local currencies. The carrying values of our equity investments in any equity investee are also subject to fluctuations in the exchange rates of foreign currencies.

We use derivative instruments, such as foreign currency forward contracts and options, to partially offset certain exposures to fluctuations in foreign currency exchange rates. The use of such instruments may not offset any, or more than a portion, of the adverse financial effects of unfavorable movements in foreign currency exchange rates. Any losses on these instruments that we

experience may adversely impact our financial results, cash flows and financial condition. Further, we hedge a portion of our net investment in Yahoo Japan Corporation (“Yahoo Japan”) with currency forward contracts and option contracts. If the Japanese yen has appreciated at maturity beyond the contract execution rate, we would be required to settle the contract by making a cash payment which could be material and could adversely impact our cash flows and financial condition. See Part I, Item 3—“Quantitative and Qualitative Disclosures About Market Risk” of this Annual Report.

Acquisitions and strategic investments could result in adverse impacts on our operations and in unanticipated liabilities.

We have acquired, and have made strategic investments in, a number of companies (including through joint ventures) in the past, and we may make additional acquisitions and strategic investments in the future. Such transactions may result in use of our cash resources, dilutive issuances of our equity securities, or incurrence of debt. Such transactions may also result in amortization expenses related to intangible assets. Our acquisitions and strategic investments to date were accompanied by a number of risks, including:

We are likely to experience similar risks in connection with our future acquisitions and strategic investments. Our failure to be successful in addressing these risks or other problems encountered in connection with our past or future acquisitions and strategic investments could cause us to fail to realize the anticipated benefits of such acquisitions or investments, incur unanticipated liabilities, and harm our business generally.

A variety of new and existing U.S. and foreign government laws and regulations could subject us to claims, judgments, monetary liabilities and other remedies, and to limitations on our business practices.

We are subject to numerous U.S. and foreign laws and regulations covering a wide variety of subject matters. New laws and regulations, changes in existing laws and regulations or the interpretation of them, our introduction of new products or forms of advertising (such as native advertising), or an extension of our business into new areas, could increase our future compliance costs, make our products and services less attractive to our users, or cause us to change or limit our business practices. We may incur substantial expenses to comply with laws and regulations or defend against a claim that we have not complied with them. Further, any failure on our part to comply with any relevant laws or regulations may subject us to significant civil or criminal liabilities, penalties, and negative publicity.

The application of existing domestic and international laws and regulations to us relating to issues such as user privacy and data protection, data transfer, security, defamation, pricing, advertising, taxation, gambling, sweepstakes, promotions, billing, real estate, fantasy sports, consumer protection, accessibility, content regulation, quality of services, law enforcement demands, telecommunications, mobile, television, and intellectual property ownership and infringement in many instances is unclear or unsettled. Further, the application to us or our subsidiaries of existing laws regulating or requiring licenses for certain businesses of our advertisers can be unclear. For example, paid fantasy sports contests are an area of current regulatory uncertainty, with various government authorities having taken positions that some types of contests are unlawful and/or subject to licensing requirements. U.S. export control laws and regulations also impose requirements and restrictions on exports to certain nations and persons and on our business. Internationally, we may also be subject to laws regulating our activities in foreign countries and to foreign laws and regulations that are inconsistent from country to country.

The Digital Millennium Copyright Act (“DMCA”) is intended, in part, to limit the liability of eligible online service providers for caching, hosting, listing or linking to, third-party websites or user content that include materials that give rise to copyright infringement. Portions of the Communications Decency Act (“CDA”) are intended to provide statutory protections to online service providers who distribute third-party content. We rely on the protections provided by both the DMCA and the CDA in conducting our business, and may be adversely impacted by future legislation and future judicial decisions altering these safe harbors or if international jurisdictions refuse to apply similar protections.

Various U.S. and international laws restrict the distribution of materials considered harmful to children and impose additional restrictions on the ability of online services to collect information from minors. These laws currently impose restrictions and requirements on our business, and future federal, state or international laws and legislative efforts designed to protect children on the Internet may impose additional requirements on us.

Our international operations expose us to additional risks that could harm our business, operating results, and financial condition.

In addition to uncertainty about our ability to continue to generate revenue from our foreign operations and expand our international market position, there are additional risks inherent in doing business internationally (including through our international joint ventures), including:

We are subject to numerous and sometimes conflicting U.S. and foreign laws and regulations which increase our cost of doing business. Violations of these complex laws and regulations that apply to our international operations could result in damage awards, fines, criminal actions, sanctions, or penalties against us, our officers or our employees, prohibitions on the conduct of our business and our ability to offer products and services, and damage to our reputation. Although we have implemented policies and procedures designed to promote compliance with these laws, there can be no assurance that our employees, contractors, or agents will not violate our policies. These risks inherent in our international operations and expansion increase our costs of doing business internationally and could result in harm to our business, operating results, and financial condition.

We may be subject to legal liability associated with providing online services or content.

We host and provide a wide variety of services and technology products that enable and encourage individuals and businesses to exchange information; upload or otherwise generate photos, videos, text, and other content; advertise products and services; conduct business; and engage in various online activities both domestically and internationally. The law relating to the liability of providers of online services and products for activities of their users is currently unsettled both within the U.S. and internationally. As a publisher and producer of original content, we may be subject to claims such as copyright, libel, defamation or improper use of publicity rights, as well as other infringement claims such as plagiarism. Claims have been threatened and brought against us for defamation, negligence, breaches of contract, plagiarism, copyright and trademark infringement, unfair competition, unlawful

activity, tort, including personal injury, fraud, or other theories based on the nature and content of information which we publish or to which we provide links or that may be posted online or generated by us or by third parties, including our users. In addition, we have been and may again in the future be subject to domestic or international actions alleging that certain content we have generated or third-party content that we have made available within our services violates laws in domestic and international jurisdictions. We arrange for the distribution of third-party advertisements to third-party publishers and advertising networks, and we offer third-party products, services, or content, such as stock quotes and trading information, under the Yahoo brand or via distribution on Yahoo Properties. We may be subject to claims concerning these products, services, or content by virtue of our involvement in marketing, branding, broadcasting, or providing access to them, even if we do not ourselves host, operate, provide, or provide access to these products, services, or content. While our agreements with respect to these products, services, and content may provide that we will be indemnified against such liabilities, the ability to receive such indemnification may be disputed, could result in substantial costs to enforce or defend, and depends on the financial resources of the other party to the agreement, and any amounts received might not be adequate to cover our liabilities or the costs associated with defense of such proceedings. Defense of any such actions could be costly and involve significant time and attention of our management and other resources, may result in monetary liabilities or penalties, and may require us to change our business in an adverse manner.

It is also possible that if any information provided directly by us contains errors or is otherwise wrongfully provided to users, third parties could make claims against us. For example, we offer web-based e-mail services, which expose us to potential risks, such as liabilities or claims, by our users and third parties, resulting from unsolicited e-mail, lost or misdirected messages, illegal or fraudulent use of e-mail, alleged violations of policies, property interests, or privacy protections, including civil or criminal laws, or interruptions or delays in e-mail service. We may also face purported consumer class actions or state actions relating to our online services, including our fee-based services (particularly in connection with any decision to discontinue a fee-based service). In addition, our customers, third parties, or government entities may assert claims or actions against us if our online services or technologies are used to spread or facilitate malicious or harmful code or applications.

Investigating and defending these types of claims are expensive, even if the claims are without merit or do not ultimately result in liability, and could subject us to significant monetary liability or cause a change in business practices that could negatively impact our ability to compete.

Certain of our metrics are subject to inherent challenges in measurement, and real or perceived inaccuracies in such metrics may harm our reputation and negatively affect our business.

We present key metrics such as unique users, number of Ads Sold, number of Paid Clicks, Search click-driven revenue, Price-per-Click and Price-per-Ad that are calculated using internal company data. We periodically review, refine and update our methodologies for monitoring, gathering, and calculating these metrics.

While our metrics are based on what we believe to be reasonable measurements and methodologies, there are inherent challenges in deriving our metrics across large online and mobile populations around the world. In addition, our user metrics may differ from estimates published by third parties or from similar metrics of our competitors due to differences in methodology. Furthermore, over time we may revise or cease reporting certain metrics that we no longer believe are useful or meaningful measures of our performance and add new metrics which we believe are better measurements of performance.

If advertisers or publishers do not perceive our metrics to be accurate, or if we discover material inaccuracies in our metrics, it could negatively affect our reputation, business and financial results.

Any failure to scale and adapt our existing technology architecture to manage expansion of user-facing services and to respond to rapid technological change could adversely affect our business.

As some of the most visited sites on the Internet, Yahoo Properties deliver a significant number of products, services, page views, and advertising impressions to users around the world. We expect our products and services to continue to expand and change significantly and rapidly in the future to accommodate new technologies, new devices, new Internet advertising solutions, and new means of content delivery.

In addition, widespread adoption of new Internet, networking or telecommunications technologies, or other technological or platform changes, could require substantial expenditures to modify or adapt our services or infrastructure. The technology architectures and platforms utilized for our services are highly complex and may not provide satisfactory security features or support in the future, as usage increases and products and services expand, change, and become more complex. In the future, we may make additional changes to our existing, or move to completely new, architectures, platforms and systems, such as the changes we have made in response to the increased use of mobile devices such as tablets and smartphones. Such changes may be technologically challenging to develop and implement, may take time to test and deploy, may cause us to incur substantial costs or data loss, and may cause changes, delays or interruptions in service. These changes, delays, or interruptions in our service may cause our users, Affiliates and other advertising platform participants to become dissatisfied with our service or to move to competing providers or seek remedial actions or compensation. Further, to the extent that demands for our services increase, we will need to expand our infrastructure, including the capacity of our hardware servers and the sophistication of our software. This expansion is likely to be expensive and complex and require additional technical expertise. As we acquire users who rely upon us for a wide variety of services, it becomes more technologically complex and costly to retrieve, store, and integrate data that will enable us to track each user’s preferences. Any difficulties experienced in adapting our architectures, platforms and infrastructure to accommodate increased traffic, to store user data, and track user preferences, together with the associated costs and potential loss of traffic, could harm our operating results, cash flows from operations, and financial condition.

We rely on third parties to provide the technologies necessary to deliver content, advertising, and services to our users, and any change in the licensing terms, costs, availability, or acceptance of these formats and technologies could adversely affect our business.

We rely on third parties to provide the technologies that we use to deliver the majority of the content, advertising, and services to our users. There can be no assurance that these providers will continue to license their technologies or intellectual property to us on reasonable terms, or at all. Providers may change the fees they charge users or otherwise change their business model in a manner that slows the widespread acceptance of their technologies. In order for our services to be successful, there must be a large base of users of the technologies necessary to deliver our content, advertising, and services. We have limited or no control over the availability or acceptance of those technologies, and any change in the licensing terms, costs, availability, or user acceptance of these technologies could adversely affect our business.

Our business depends on continued and unimpeded access to the Internet by us and our users. Internet access providers may be able to block, degrade, or charge for access to certain of our products and services, which could lead to additional expenses and the loss of users and advertisers.

Our products and services depend on the ability of our users to access the Internet, and certain of our products require significant bandwidth to work effectively. Currently, this access is provided by companies that have significant market power in the broadband and internet access marketplace,

including incumbent telephone companies, cable companies, mobile communications companies, and government-owned service providers. Some of these providers may take, or have stated that they may take, measures that could degrade, disrupt, or increase the cost of user access to certain of our products by restricting or prohibiting the use of their infrastructure to support or facilitate our offerings, or by charging increased fees to us or our users to provide our offerings. Such interference could result in a loss of existing users and advertisers, and increased costs, and could impair our ability to attract new users and advertisers, thereby harming our revenues and growth. The adoption of any laws or regulations that limit access to the Internet by blocking, degrading or charging access fees to us or our users for certain services could decrease the demand for, or the usage of, our products, services and apps, increase our cost of doing business and adversely affect our operating results.

Any failure to manage expansion and changes to our business could adversely affect our operating results.

If we are unable to effectively manage a large and geographically dispersed group of employees or to anticipate our future growth, our business may be adversely affected. As we change and expand our business, we must also expand and adapt our operational infrastructure. Our business relies on data systems, billing systems, and financial reporting and control systems, among others. All of these systems have become increasingly complex in the recent past due to the growing complexity of our business, acquisitions of new businesses with different systems, and increased regulation over controls and procedures. To manage our business in a cost-effective manner, we will need to continue to upgrade and improve our data systems, billing systems, and other operational and financial systems, procedures, and controls. In some cases, we are outsourcing administrative functions to lower-cost providers. These upgrades, improvements and outsourcing changes will require a dedication of resources and in some cases are likely to be complex. If we are unable to adapt our systems and put adequate controls in place in a timely manner, our business may be adversely affected. In particular, sustained failures of our billing systems to accommodate increasing numbers of transactions, to accurately bill users and advertisers, or to accurately compensate Affiliates could adversely affect the viability of our business model.

We have dedicated resources to provide a variety of premium enhancements to our products, services and apps, which might not prove to be successful in generating significant revenue for us.

We offer fee-based enhancements for many of our free services. The development cycles for these technologies are long and generally require investment by us. We have invested and will continue to invest in premium products, services and apps. Some of these premium products, services and apps might not generate anticipated revenue or might not meet anticipated user adoption rates. We have previously discontinued some non-profitable premium services and may discontinue others. General economic conditions as well as the rapidly evolving competitive landscape may affect users’ willingness to pay for such premium services. If we cannot generate revenue from our premium services that are greater than the cost of providing such services, our operating results could be harmed.

We may have exposure to additional tax liabilities which could negatively impact our income tax provision, net income, and cash flow.

We are subject to income taxes and other taxes in both the U.S. and the foreign jurisdictions in which we currently operate or have historically operated. The determination of our worldwide provision for income taxes and current and deferred tax assets and liabilities requires judgment and estimation. Our income taxes could be adversely affected by earnings being lower than anticipated in

jurisdictions that have lower statutory tax rates and higher than anticipated in jurisdictions that have higher statutory tax rates, by changes in the valuation of our deferred tax assets and liabilities, or by changes in tax laws, regulations, or accounting principles.

In the ordinary course of our business, there are many transactions and calculations where the ultimate tax determination is uncertain. As a U.S. multinational corporation, we are subject to changing tax laws both within and outside of the U.S. We cannot predict the form or timing of potential legislative changes, but any newly enacted tax law could have a material adverse impact on our tax expense and cash flow. For example, several jurisdictions have sought to increase revenues by imposing new taxes on internet advertising or increasing general business taxes. In addition, the Organization for Economic Co-operation and Development (“OECD”), which represents a coalition of member countries, is supporting changes to numerous long-standing tax principles through its base erosion and profit shifting (BEPS) project, which is focused on a number of issues, including the shifting of profits between affiliated entities in different tax jurisdictions. To the extent any of these proposals are enacted into legislation by OECD member countries, or if other international, consensus-based tax policies and principles are amended or implemented, they could adversely affect the amount of tax we pay and thereby our financial position and results of operations.

We earn a material amount of our income from outside the U.S. As of December 31, 2015, we had undistributed foreign earnings of approximately $3.3 billion, principally related to our equity method investment in Yahoo Japan. While we do not currently anticipate repatriating these earnings, any repatriation of funds in foreign jurisdictions to the U.S. could result in higher effective tax rates for us and subject us to significant additional U.S. income tax liabilities.

We are subject to regular review and audit by both domestic and foreign tax authorities as well as subject to the prospective and retrospective effects of changing tax regulations and legislation. Although we believe our tax estimates are reasonable, the ultimate tax outcome may materially differ from the tax amounts recorded in our consolidated financial statements and may materially affect our income tax provision, net income, or cash flows in the period or periods for which such determination and settlement is made.

Proprietary document formats may limit the effectiveness of our search technology by preventing our technology from accessing the content of documents in such formats, which could limit the effectiveness of our products and services.

A large amount of information on the Internet is provided in proprietary document formats. These proprietary document formats may limit the effectiveness of search technology by preventing the technology from accessing the content of such documents. The providers of the software applications used to create these documents could engineer the document format to prevent or interfere with the process of indexing the document contents with search technology. This would mean that the document contents would not be included in search results even if the contents were directly relevant to a search. The software providers may also seek to require us to pay them royalties in exchange for giving us the ability to search documents in their format. If the search platform technology we employ is unable to index proprietary format web documents as effectively as our competitors’ technology, usage of our search services might decline, which could cause our revenue to fall.

Adverse macroeconomic conditions could cause decreases or delays in spending by our advertisers and could harm our ability to generate revenue and our results of operations.

Advertising expenditures tend to be cyclical, reflecting overall economic conditions and budgeting and buying patterns. Since we derive most of our revenue from advertising, adverse macroeconomic

conditions have caused, and future adverse macroeconomic conditions could cause, decreases or delays in advertising spending and negatively impact our advertising revenue and short-term ability to grow our revenue. Further, any decreased collectability of accounts receivable or early termination of agreements, whether resulting from customer bankruptcies or otherwise due to adverse macroeconomic conditions, could negatively impact our results of operations.

Our stock price has been volatile historically and may continue to be volatile regardless of our operating performance.

The trading price of our common stock has been and may continue to be subject to broad fluctuations. During the twelve months ended December 31, 2015, the closing sale price of our common stock on the NASDAQ Global Select Market ranged from $27.60 to $50.23 per share and the closing sale price on February 12, 2016 was $27.04 per share. Our stock price may fluctuate in response to a number of events and factors, such as variations in quarterly operating results or announcements of technological innovations, significant transactions, or new features, products or services by us or our competitors; changes in financial estimates and recommendations by securities analysts; the operating and stock price performance of, or other developments involving, other companies that investors may deem comparable to us; trends in our industry; general economic conditions; and the operating performance and market valuation of Alibaba Group Holding Limited (“Alibaba Group”) and Yahoo Japan in which we have investments. The equity valuation of our investment in Yahoo Japan may be impacted due to fluctuations in foreign currency exchange rates. We present our investment in Alibaba Group on our consolidated balance sheet as an available-for-sale marketable security. Consequently, the carrying value of this investment on our consolidated balance sheet will vary over time and fluctuations in its valuation may cause our stock price to fluctuate.

In addition, the stock market in general, and the market prices for companies in our industry, have experienced volatility that often has been unrelated to operating performance. These broad market and industry fluctuations may adversely affect the price of our stock, regardless of our operating performance. A decrease in the market price of our common stock would likely adversely impact the trading price of the 0.00% Convertible Senior Notes due 2018 that we issued in November 2013 (the “Notes”). Volatility or a lack of positive performance in our stock price may also adversely affect our ability to retain key employees who have been granted stock options or other stock-based awards. A sustained decline in our stock price and market capitalization could lead to an impairment charge to our long-lived assets.

Delaware statutes and certain provisions in our charter documents could make it more difficult for a third-party to acquire us.

Our Board has the authority to issue up to 10 million shares of preferred stock and to determine the price, rights, preferences, privileges and restrictions, including voting rights, of those shares without any further vote or action by the stockholders. The rights of the holders of our common stock may be subject to, and may be adversely affected by, the rights of the holders of any preferred stock that may be issued in the future. The issuance of preferred stock may have the effect of delaying, deterring or preventing a change in control of Yahoo without further action by the stockholders and may adversely affect the voting and other rights of the holders of our common stock.

Some provisions of our charter documents, including provisions eliminating the ability of stockholders to take action by written consent and limiting the ability of stockholders to raise matters at a meeting of stockholders without giving advance notice, may have the effect of delaying or preventing changes in control or changes in our management, which could have an adverse effect on the market price of our stock and the value of the $1.4375 billion aggregate principal amount of

the Notes we issued in November 2013. In addition, our charter documents do not permit cumulative voting, which may make it more difficult for a third-party to gain control of our Board. Further, we are subject to the anti-takeover provisions of Section 203 of the Delaware General Corporation Law, which will prohibit us from engaging in a “business combination” with an “interested stockholder” for a period of three years after the date of the transaction in which the person became an interested stockholder, even if such combination is favored by a majority of stockholders, unless the business combination is approved in a prescribed manner. The application of Section 203 also could have the effect of delaying or preventing a change in control of us.

Any of these provisions could, under certain circumstances, depress the market price of our common stock and the Notes.

Risks Relating to the Notes

The conditional conversion feature of the Notes, if triggered, may adversely affect our financial condition and operating results.

In the event the conditional conversion feature of the Notes is triggered, holders of Notes will be entitled to convert the Notes at any time during specified periods at their option. If one or more holders elect to convert their Notes, unless we elect to satisfy our conversion obligation by delivering solely shares of our common stock (other than paying cash in lieu of delivering any fractional share), we would be required to settle a portion or all of our conversion obligation through the payment of cash, which could adversely affect our liquidity. In addition, even if holders do not elect to convert their Notes, we could be required under applicable accounting rules to reclassify all or a portion of the outstanding principal of the Notes as a current rather than long-term liability, which would result in a material reduction of our net working capital.

We may not have the ability to raise the funds necessary to settle conversions of the Notes in cash or to repurchase the Notes upon a fundamental change, and our future debt may contain limitations on our ability to pay cash upon conversion or repurchase of the Notes.

Holders of the Notes will have the right to require us to repurchase all or a portion of their Notes upon the occurrence of a fundamental change at a repurchase price equal to 100% of the principal amount of the Notes to be repurchased, plus accrued and unpaid special interest, if any. We may not have enough available cash or be able to obtain financing at the time we are required to make repurchases of Notes surrendered therefore, or pay cash with respect to Notes being converted if we elect not to issue shares, which could harm our reputation and affect the trading price of our common stock.

The note hedge and warrant transactions may affect the value of the Notes and our common stock.

In connection with the pricing of the Notes, we entered into note hedge transactions with the option counterparties. The note hedge transactions are generally expected to reduce the potential dilution upon conversion of the Notes and/or offset any cash payments we are required to make in excess of the principal amount of converted Notes, as the case may be. We also entered into warrant transactions with the option counterparties. However, the warrant transactions could separately have a dilutive effect to the extent that the market price per share of our common stock exceeds the applicable strike price of the warrants.

In connection with establishing their initial hedge of the note hedge and warrant transactions, the option counterparties or their respective affiliates have purchased shares of our common stock

and/or entered into various derivative transactions with respect to our common stock concurrently with or shortly after the pricing of the Notes. In addition, the option counterparties or their respective affiliates may modify their hedge positions by entering into or unwinding various derivatives with respect to our common stock and/or purchasing or selling our common stock or other securities of ours in secondary market transactions prior to the maturity of the Notes (and are likely to do so during any observation period related to a conversion of Notes or following any repurchase of Notes by us on any fundamental repurchase date or otherwise). This activity could cause or avoid an increase or a decrease in the market price of our common stock or the Notes.

Any adverse change in the rating of the Notes or the Company may cause their trading price to decline.

While we did not solicit a credit rating on the Company or on the Notes, one rating service has rated both the Notes and the Company. If that rating service announces its intention to put the Company or the Notes on credit watch or lowers its rating on the Company or the Notes below any rating initially assigned to the Company or the Notes, the trading price of the Notes could decline.

The accounting method for convertible debt securities that may be settled in cash, such as the Notes, could have a material effect on our reported financial results.

In May 2008, the Financial Accounting Standards Board (“FASB”) issued FASB Staff Position No. APB 14-1, Accounting for Convertible Debt Instruments That May Be Settled in Cash Upon Conversion (Including Partial Cash Settlement), which has subsequently been codified as Accounting Standards Codification (“ASC”) 470-20, Debt with Conversion and Other Options, which we refer to as ASC 470-20. Under ASC 470-20, an entity must separately account for the liability and equity components of the convertible debt instruments (such as the Notes) that may be settled entirely or partially in cash upon conversion in a manner that reflects the issuer’s economic interest cost. The effect of ASC 470-20 on the accounting for the Notes is that the equity component is required to be included in the additional paid-in capital section of stockholders’ equity on our consolidated balance sheet, and the value of the equity component would be treated as debt discount for purposes of accounting for the debt component of the Notes. As a result, we will be required to record a greater amount of non-cash interest expense in current periods presented as a result of the amortization of the discounted carrying value of the Notes to their face amount over the term of the Notes. We will report lower net income in our financial results because ASC 470-20 will require interest to include the current period’s amortization of the debt discount, which could adversely affect our reported or future financial results, the trading price of our common stock and the trading price of the Notes.

In addition, under certain circumstances, convertible debt instruments (such as the Notes) that may be settled entirely or partly in cash are currently accounted for utilizing the treasury stock method, the effect of which is that the shares issuable upon conversion of the Notes are not included in the calculation of diluted earnings per share except to the extent that the conversion value of the Notes exceeds their principal amount. Under the treasury stock method, for diluted earnings per share purposes, the transaction is accounted for as if the number of shares of common stock that would be necessary to settle such excess, if we elected to settle such excess in shares, are issued. We cannot be sure that the accounting standards in the future will continue to permit the use of the treasury stock method. If we are unable to use the treasury stock method in accounting for the shares issuable upon conversion of the Notes, then our diluted earnings per share would be adversely affected.

Item 1B. Unresolved Staff Comments

None.

Item 2. Properties

Our headquarters is located in Sunnyvale, California and consists of owned space aggregating approximately one million square feet. We lease office space in Argentina, Australia, Brazil, Canada, France, Germany, Hong Kong, India, Ireland, Israel, Italy, Japan, Mexico, New Zealand, Norway, Singapore, Spain, Taiwan, the United Arab Emirates, and the United Kingdom. In the United States, we lease offices in various locations, including Atlanta, Beaverton, Boston, Champaign, Chicago, Dallas, Detroit, Hillsboro, the Los Angeles Area, Miami, Mountain View, New York, Omaha, San Francisco, and Washington, D.C. Our data centers are operated in locations in the United States, Brazil, Europe, and Asia. In connection with our strategic plan, we are exploring contract terminations and subleases where we feel we no longer need office space.

We believe that our existing facilities will be adequate to meet current requirements, and that suitable additional or substitute space will be available as needed to accommodate any further physical expansion of operations and for any additional sales offices.

Item 3. Legal Proceedings

For a description of our material legal proceedings, see “Legal Contingencies” in Note 12—“Commitments and Contingencies” in the Notes to our consolidated financial statements, which is incorporated herein by reference.

Item 4. Mine Safety Disclosures

Not applicable.

PART II

Item 5. Market for Registrant’s Common Equity,

Related Stockholder Matters and Issuer Purchases of Equity Securities

Market Information for Common Stock

Yahoo! Inc. common stock is quoted on the NASDAQ Global Select Market under the symbol “YHOO.” The following table sets forth the range of high and low per share sales prices as reported for each period indicated:

Stockholders

We had 8,846 stockholders of record as of February 12, 2016.

Dividends

We have not declared or paid any cash dividends on our common stock. We presently do not have plans to pay any cash dividends in the near future.

Issuer Repurchases of Equity Securities

We did not purchase any shares of our common stock during the fourth quarter of 2015.

Performance Graph

This performance graph shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities under that sectionSEC and shall not be deemed to be incorporated by reference into any filing of Yahoo! Inc. under the Securities Act or the Exchange Act.

The following graph compares, for the five-year period ended December 31, 2015, the cumulative total stockholder return for Yahoo’s common stock, the NASDAQ 100 Index, the Standard & Poor’s North American Technology-Internet Index (the “S&P Internet”), and the Standard & Poor’s 500 Stock Index (the “S&P 500”). Measurement points are the last trading day of each of Yahoo’s fiscal years ended December 31, 2011, 2012, 2013, 2014, and 2015. The graph assumes that $100 was invested at the market close on December 31, 2010 in the common stock of Yahoo, the NASDAQ 100 Index, the S&P Internet, and the S&P 500 and assumes reinvestment of any dividends. The stock price performance on the following graph is not necessarily indicative of future stock price performance.

Item 6. Selected Financial Data

The following selected consolidated financial data should be read in conjunction“filed” with the consolidated financial statements and notes thereto and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” appearing elsewhere inSEC. In addition, this Annual Report on Form 10-K. The consolidated statements of operations data and the consolidated balance sheets data for the years ended, and as of, December 31, 2011, 2012, 2013, 2014, and 2015Amendment includes several website addresses. Those website addresses are derived from our audited consolidated financial statements.

Consolidated Statements of Operations Data:

(3)

Our net income attributable to Yahoo! Inc. for the year ended December 31, 2011 included a non-cash gain of $25 million, net of tax, related to the dilution of our ownership interest in Alibaba Group Holding Limited (“Alibaba Group”) and a non-cash loss of $33 million related to impairments of assets held by Yahoo Japan. In addition, in the year ended December 31, 2011, we recorded net restructuring charges of $24 million related to our cost reduction initiatives. Apart from the Search Agreement, the tax impact of the items referred to above was an $8 million benefit, and these items had a net negative impact of $24 million on net income attributable to Yahoo! Inc., or $0.02 per both basic and diluted share, for the year ended December 31, 2011.

Consolidated Balance Sheets Data:

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

Overview

Yahoo! Inc., together with its consolidated subsidiaries (“Yahoo,” the “Company,” “we,” or “us”), is a guide to digital information discovery, focused on informing, connecting, and entertaining our users through our search, communications, and digital content products. By creating highly personalized experiences, we help users discover the information that matters most to them around the world –– on mobile or desktop. We create value for advertisers with a streamlined, simple advertising technology stack that leverages Yahoo’s data, content, and technology to connect advertisers with their target audiences. Advertisers can build their businesses through advertising to targeted audiences on our online properties and services (“Yahoo Properties”) and a distribution network of third party entities (“Affiliates”) who integrate our advertising offerings into their websites or other offerings (“Affiliate sites”). Our revenue is generated principally from search and display advertising. We continue to manage and measure our business geographically, principally in the Americas, EMEA (Europe, Middle East, and Africa), and Asia Pacific.

In the following Management’s Discussion and Analysis, we provide information regarding the following areas:

Key Financial Metrics

The key financial metrics we use are as follows: revenue; revenue less traffic acquisition costs (“TAC”), or revenue ex-TAC; income (loss) from operations; adjusted EBITDA; net income (loss) attributable to Yahoo! Inc.; net cash provided by (used in) operating activities; and free cash flow. Revenue ex-TAC, adjusted EBITDA, and free cash flow are financial measures that are not defined in accordance with U.S. generally accepted accounting principles (“GAAP”). We use these non-GAAP financial measures for internal managerial purposes and to facilitate period-to-period comparisons. See “Non-GAAP Financial Measures” below for a description of, and limitations specific to, each of these non-GAAP financial measures.

Non-GAAP Financial Measures

Revenue ex-TAC.    Revenue ex-TAC is a non-GAAP financial measure defined as GAAP revenue less TAC that has been recorded as a cost of revenue. TAC consists of payments made to Affiliates and payments made to companies that direct consumer and business traffic to Yahoo Properties. TAC is recorded either as a reduction of revenue or as cost of revenue.

We present revenue ex-TACintended to provide investors a metric used by us for evaluation and decision-making purposes and to provide investors with comparable revenue numbers when comparing to our historical reported financial information. A limitation of revenue ex-TACinactive, textual references only. The information on those websites is that it is a measure we defined for internal and investor purposes that may be unique to us, and therefore it may not enhance the comparability of our results to those of other companies in our industry who have similar business arrangements but address the impact of TAC differently. Management compensates for these limitations by also relying on the comparable GAAP financial measures of revenue and cost of revenue—TAC.

Adjusted EBITDA.    Adjusted EBITDA is a non-GAAP financial measure defined as net income (loss) attributable to Yahoo! Inc. before taxes, depreciation, amortization of intangible assets, stock-based compensation expense, other income (expense), net (which includes interest), earnings in equity interests, net income attributable to noncontrolling interests, and other gains, losses, and expenses that we do not believe are indicative of our ongoing results.

We present adjusted EBITDA because the exclusion of certain gains, losses, and expenses facilitates comparisons of the operating performance of our Company on a period-to-period basis. Adjusted EBITDA has limitations as an analytical tool and should not be considered in isolation or as a substitute for results reported under GAAP. These limitations include: adjusted EBITDA does not reflect tax payments and such payments reflect a reduction in cash available to us; adjusted EBITDA does not reflect the periodic costs of certain capitalized tangible and intangible assets used in generating revenues in our businesses; adjusted EBITDA does not include stock-based compensation expense related to our workforce; adjusted EBITDA also excludes other income (expense), net (which includes interest), earnings in equity interests, net income attributable to noncontrolling interests and other gains, losses, and expenses that we do not believe are indicative of our ongoing results, and these items may represent a reduction or increase in cash available to us; and adjusted EBITDA is a measure that may be unique to us, and therefore it may not enhance the comparability of our results to other companies in our industry. Management compensates for these limitations by also relying on the comparable GAAP financial measure of net income (loss) attributable to Yahoo! Inc., which includes taxes, depreciation, amortization, stock-based compensation expense, other income (expense), net (which includes interest), earnings in equity interests, net income attributable to noncontrolling interests and the other gains, losses and expenses that are excluded from adjusted EBITDA.

Free Cash Flow.    Free cash flow is a non-GAAP financial measure defined as net cash provided by (used in) operating activities (adjusted to include excess tax benefits from stock-based awards), less acquisition of property and equipment, net (i.e., acquisition of property and equipment less proceeds received from disposition of property and equipment) and dividends received from equity investees.

We consider free cash flow to be a liquidity measure which provides useful information to management and investors about the amount of cash generated by business operations, after deducting our net payments for acquisitions and dispositions of property and equipment, which cash can then be used for strategic opportunities or other business purposes including, among others, investing in our business, making strategic acquisitions, strengthening the balance sheet, and repurchasing stock. A limitation of free cash flow is that it does not represent the total increase or decrease in the cash balance for the period. Management compensates for this limitation by also relying on the net change in cash and cash equivalents as presented in our consolidated statements of cash flows prepared in accordance with GAAP which incorporates all cash movements during the period.

Revenue

For the year ended December 31, 2015, revenue and TAC increased $350 million and $660 million, respectively, or 8 percent and 303 percent, compared to 2014. For the year ended December 31, 2015, revenue ex-TAC (a non-GAAP financial measure) decreased $310 million, or 7 percent, compared to 2014. The increase in revenue for the year ended December 31, 2015 was primarily attributable to an increase in search and display revenue resulting from an increase in revenue from distribution partners, including Mozilla Corporation (“Mozilla”), revenue from mobile devices and incremental revenue from the BrightRoll acquisition, a programmatic video advertising platform that we acquired in December 2014. This growth was partially offset by declines in our legacy desktop display business, search revenue driven by a decline in Yahoo search traffic, and a decline in other revenue associated with Alibaba Group royalty revenue, for which we no longer recognize fees revenue due to the cessation of royalties. The increase in TAC for the year ended December 31, 2015, which exceeded the revenue increases for the same period resulting in a decline in revenue ex-TAC, was primarily driven by higher payments to distribution partners, including Mozilla, TAC increase associated with Gemini, and incremental TAC related to the BrightRoll acquisition.

Of the $350 million increase in revenue and $660 million increase in TAC for the year ended December 31, 2015, $394 million and $375 million were attributable to the agreement we entered into in November 2014 to compensate Mozilla for making us the default search provider on certain of Mozilla’s products in the United States (the “Mozilla Agreement”). See “Results of Operations” for a more detailed discussion of the factors that contributed to the changes in revenue and TAC during this period.

Gemini is our unified marketplace for search and native advertising on Yahoo Properties and Affiliate sites. Gemini ads appear on search results pages in response to queries and also as native ads alongside display content. Advertisers place ads on the Gemini platform through our simple self-serve interface, as well as through Yahoo’s traditional sales force; we do not source Gemini ads from Microsoft or other third-party providers. Because we are the primary obligor to Gemini advertisers, we recognize Gemini revenue gross of the related TAC paid to Affiliates. During 2015, we increased the proportion of search queries being routed to the Gemini platform, which resulted in reduced paid clicks as we work to optimize the system. We expect to see a reduction in the impact on paid clicks by the second half of 2016.

For the year ended December 31, 2014, revenue, TAC and revenue ex-TAC decreased $62 million, $37 million and $25 million, respectively, or 1 percent, 15 percent, and 1 percent, compared to 2013. The decrease in revenue was attributable to a decline in display revenue resulting from a mix shift from premium to native ad units, as well as a decline in other revenue associated with a decline in listings-based revenue. These declines were partially offset by an increase in search revenue driven by revenue-per-search in the Americas segment on Yahoo Properties and growth in advertising revenue from mobile. The decline in TAC for the year ended December 31, 2014, compared to 2013, was primarily driven by the impact of the transition of paid search to Microsoft’s platform.

We expect 2016 revenue to be less than the amount reported in 2015 as a result of the completion of recognition of deferred revenue under the Technology and Intellectual Property License Agreement (the “TIPLA”) with Alibaba Group, strategic product exits, declines in our legacy desktop display business and a decline in desktop search volume. We expect growth from our Mavens offerings to partially offset this decline.

Mavens Revenue

One of our primary strategies is to invest in and grow our Mavens offerings. Revenue from our Mavens offerings is generated from, without duplication, (i) mobile (as defined below), (ii) video ads and video ad packages, (iii) native ads, and (iv) Tumblr and Polyvore ads and fees.

Mavens revenue for the year ended December 31, 2015 increased 45 percent to $1,660 million, compared to $1,148 million for the year ended December 31, 2014. The increase in Mavens revenue for the year ended December 31, 2015 was primarily related to growth in mobile advertising, and to a lesser extent, growth in native and video advertising.

We expect our Mavens revenue to increase in 2016 from the amount reported in 2015.

Mobile Revenue

With the significant platform shift to mobile devices, we continue to focus on mobile products and mobile ad formats. We have refreshed the user experience on mobile across a number of Yahoo Properties, including Fantasy Sports, Sports, Mail, Search and Tumblr. As of December 31, 2015, we had more than 600 million monthly mobile users (including mobile Tumblr users).

Mobile revenue is generated in connection with user activity on mobile devices, including smartphones and tablets (a “device-based” approach), regardless of whether the device is accessing a mobile-optimized service. Mobile revenue is primarily generated by search and display advertising. Mobile search revenue is generated from clicks on text-based links to advertisers’ websites that appear primarily on search results pages. Search revenue is recognized based on Paid Clicks. A Paid Click occurs when an end-user clicks on a sponsored listing on Yahoo Properties or Affiliate sites for which an advertiser pays on a per click basis. Mobile display revenue is generated from the display of graphical, non-graphical, and video advertisements on mobile devices. The Company recognizes revenue from display advertising on Yahoo Properties and Affiliate sites as impressions of or clicks on display advertisements are delivered. Impressions are delivered when a sold advertisement appears in pages viewed by users. Clicks are delivered when a user clicks on a native advertisement. Mobile revenue also includes leads, listings and fees revenue and e-commerce revenue allocated to user activity on mobile devices. Mobile revenue is included within Search, Display, and Other revenue that we have reported.

Mobile revenue for the year ended December 31, 2015 increased 36 percent to $1,048 million, compared to $768 million for the year ended December 31, 2014. The increase in mobile revenue for the year ended December 31, 2015 was primarily attributable to growth in display revenue on mobile devices driven by native advertising and growth in search revenue on mobile devices driven by mobile search advertising on our Yahoo Gemini platform.

We expect our mobile revenue to increase in 2016 from the amount reported in 2015.

Adjusted EBITDA (a non-GAAP financial measure)

For the year ended December 31, 2015, adjusted EBITDA decreased $410 million, or 30 percent, compared to 2014, mainly due to higher TAC payments to support our growth and partnership initiatives across Search, Communications and Digital Content, a lower benefit from patent sales year-over-year, and an increase in direct costs in the Americas segment, partially offset by a decline in global operating costs.

For the year ended December 31, 2014, adjusted EBITDA decreased $203 million, or 13 percent, compared to 2013, mainly due to an increase in global operating costs to support our growth initiatives.

Free Cash Flow (a non-GAAP financial measure)

For the year ended December 31, 2015, free cash flow decreased $3.6 billion, compared to 2014, primarily due to satisfaction of the $3.3 billion income tax liability related to the sale of Alibaba Group ADSs in September 2014 and an increase in the acquisition of property and equipment to support our product investment initiatives in our Mail, Search, and Mavens offerings.

For the year ended December 31, 2014, free cash flow decreased $200 million, compared to 2013, primarily due to a decline in adjusted EBITDA and an increase in the acquisition of property and equipment to support our growth initiatives.

Recent Developments

On February 2, 2016, we announced a strategic plan to simplify Yahoo, narrowing our focus on areas of strength to fuel growth, drive revenue, and increase efficiency in 2016 and beyond.We will simplify our product portfolio to emphasize the products that distinguish us competitively and drive the most substantial portion of users, revenue and market opportunity. As part of this plan, we also announced plans to reduce costs, including reducing our work force by approximately 15 percent by the end of 2016 and closing five offices, and to explore divesting non-core assets.

In parallel with executing our strategic plan, we are also exploring strategic alternatives, including transactions to separate our remaining stake in Alibaba Group from our operating business focusing on a reverse spin transaction, as well as exploring strategic proposals for the operating business. Our Board has formed a Strategic Review Committee of independent directors to lead this process. The Strategic Review Committee has engaged advisors and is establishing a process for engaging with interested parties regarding strategic alternatives.

Significant Transactions

Search Agreement with Microsoft Corporation

The term of the Search Agreement is 10 years from its commencement date, February 23, 2010, subject to earlier termination as provided in the Search Agreement. Under the current terms of the Search Agreement, as amended on April 15, 2015 by the Eleventh Amendment to the Search Agreement (the “Eleventh Amendment”), we are entitled to receive a percentage of the revenue (the “Revenue Share Rate”) generated from Microsoft’s services on Yahoo Properties and on Affiliate sites equal to 93 percent. Microsoft receives its 7 percent revenue share before deduction of the Affiliate site’s share of revenue. The Affiliate site’s share of revenue is deducted from our 93 percent Revenue Share Rate. Pursuant to the Eleventh Amendment, commencing on May 1, 2015, we also agreed to request paid search results from Microsoft for 51 percent of our search queries originating from personal computers accessing Yahoo Properties and our Affiliate sites and will display only Microsoft’s paid search results on such search result pages.

Previously under the Search Agreement, Yahoo had sales exclusivity for both Yahoo’s and Microsoft’s premium advertisers. Pursuant to the Eleventh Amendment to the Search Agreement, this sales exclusivity terminated on July 1, 2015. Yahoo and Microsoft have been transitioning premium advertisers for Microsoft’s paid search services to Microsoft on a market-by-market basis. As of February 26, 2016, such transition was substantially complete for most markets in North America and Europe, and the parties are cooperating on transitioning the remaining markets.

Revenue under the Search Agreement represented approximately 31 percent, 35 percent, and 35 percent of our revenue for the years ended December 31, 2013, 2014, and 2015, respectively.

See Note 19—“Search Agreement with Microsoft Corporation” in the Notes to our consolidated financial statements for additional information.

Services Agreement with Google Inc.

On October 19, 2015, Yahoo and Google entered into the Google Services Agreement (the “Services Agreement”). The Services Agreement expires on December 31, 2018, subject to earlier termination as provided in the Services Agreement. Pursuant to the Services Agreement, Google will provide us with search advertisements through Google’s AdSense for Search service (“AFS”), web algorithmic search services through Google’s Websearch Service, and image search services. The results provided by Google for these services will be available to us for display on both desktop and mobile platforms. We may use Google’s services on Yahoo Properties and on certain Affiliate sites in the United States (U.S.), Canada, Hong Kong, Taiwan, Singapore, Thailand, Vietnam, Philippines, Indonesia, Malaysia, India, Middle East, Africa, Mexico, Argentina, Brazil, Colombia, Chile, Venezuela, Peru, Australia and New Zealand.

Under the Services Agreement, we have discretion to select which search queries to send to Google and are not obligated to send any minimum number of search queries. The Services Agreement is non-exclusive and expressly permits us to use any other search advertising services, including our own service, the services of Microsoft or other third parties.

Google will pay us a percentage of the gross revenues from AFS ads displayed on Yahoo Properties or Affiliate sites. The percentage will vary depending on whether the ads are displayed on U.S. desktop sites, non-U.S. desktop sites or on the tablet or mobile phone versions of the Yahoo Properties or our Affiliate sites. We will pay Google fees for requests for image search results or web algorithmic search results.

The Services Agreement may be terminated by either party upon certain events, including, among others: upon a material breach subject to certain limitations; in the event of a change in control (as defined in the Services Agreement); and subject to certain conditions and limitations, the occurrence or threatened occurrence of certain litigation or regulatory proceedings adversely impacting the performance of the Services Agreement or a party as a result of the continued performance of the Services Agreement.

Acquisition of Polyvore

On September 2, 2015, we completed the acquisition of Polyvore, a social commerce website, for $161 million. Polyvore lets users across the globe discover and shop for their favorite products in fashion, beauty and home décor.

See Note 4—“Acquisitions and Dispositions” in the Notes to our consolidated financial statements for additional information.

Results of Operations

Revenue

We generate revenue principally from search and display advertising on Yahoo Properties and Affiliate sites, with the majority of our revenue coming from advertising on Yahoo Properties. Our margins on revenue from advertising on Yahoo Properties are higher than our margins on revenue from advertising on Affiliate sites, as we pay TAC to our Affiliates. Additionally, we generate revenue from other sources including listings-based services, facilitating commercial transactions, royalties, patent licenses, and consumer and business fee-based services.

Search Revenue

Search revenue is generated from mobile and desktop clicks on text-based links to advertisers’ websites that appear primarily on search results pages (“search advertising”). We recognize revenue from search advertising on Yahoo Properties and Affiliate sites. Search revenue is recognized based on Paid Clicks. A Paid Click occurs when an end-user clicks on a sponsored listing on Yahoo Properties or Affiliate sites for which an advertiser pays on a per click basis. Under the Search Agreement with Microsoft we report as revenue our 93 percent revenue share as we are not the primary obligor in the arrangement with the advertisers and publishers, and the amounts paid to Affiliates are recorded as a reduction of revenue. The search revenue generated from mobile ads served through Yahoo Gemini that involve traffic supplied by Affiliates is reported gross of the TAC paid to Affiliates (reported as cost of revenue—TAC) as we perform the search service. Accordingly, we are considered the primary obligor to the advertisers who are the customers of the search advertising service. In October 2015, We reached an agreement with Google that provides us with additional flexibility to choose among suppliers of search results and ads. Google’s offerings

complement the search services provided by Microsoft and Yahoo Gemini (Yahoo’s marketplace for search and native advertising). We also generate search revenue from a revenue sharing arrangement with Yahoo Japan Corporation (“Yahoo Japan”) for search technology and services as reported.

The following table presents search revenue and that revenue as a percentage of total revenue for the periods presented (dollars in thousands):

Search revenue for the year ended December 31, 2015 increased $291 million, or 16 percent, compared to 2014. This increase in search revenue was attributable to growth in revenue generated on Yahoo Properties of $292 million, primarily in the Americas segment. This increase resulted from higher search volume on desktop due primarily to the Mozilla Agreement, which contributed $394 million, as well as an increase in revenue from search advertising on mobile devices. The increase was partially offset by a decline in click volume on other visits to Yahoo Properties. Affiliate search revenue overall remained flat but consisted of declines in the Asia Pacific and EMEA segments of $30 million and $13 million, respectively, partially offset by an increase in the Americas segment of $42 million.

The total increase in search revenue for the year ended December 31, 2015 described above included the impact of unfavorable foreign exchange fluctuations of $41 million using the foreign currency exchange rates from the year ended December 31, 2014.

Search revenue for the year ended December 31, 2014 increased $51 million, or 3 percent, compared to 2013, driven by higher revenue-per-search in the Americas segment on Yahoo Properties and growth in advertising revenue from mobile, partially offset by the impact of the Microsoft transition in the Asia Pacific segment. Search revenue grew despite the expiration in March 2014 of Microsoft’s guarantee of Yahoo revenue-per-search under the Search Agreement (the “RPS Guarantee”) in the U.S. The increase in search revenue for the year ended December 31, 2014 was primarily attributable to an increase in advertising revenue on Yahoo Properties in the Americas, EMEA, and Asia Pacific segments of $94 million, $38 million, and $15 million, respectively, partially offset by a decline in advertising revenue on Affiliate sites in the Americas, EMEA, and Asia Pacific segments of $12 million, $8 million and $76 million, respectively. The decline in Affiliate search revenue in the Asia Pacific segment was due to the required change in revenue presentation for transitioned markets from a gross (before TAC) to a net (after TAC) basis.

Display Revenue

Display revenue is generated from the display of graphical, non-graphical, and video advertisements (“display advertising”). We earn revenue from guaranteed or “premium” display advertising by

delivering advertisements according to advertisers’ specified criteria, such as number of impressions during a fixed period on a specific placement. Also, we earn revenue from non-guaranteed display advertising, which includes native advertising, by delivering advertisements on a preemptible basis.

We recognize revenue from display advertising on Yahoo Properties and Affiliate sites as impressions of or clicks on display advertisements are delivered. Impressions are delivered when a sold advertisement appears in pages viewed by users. Clicks are delivered when a user clicks on a native advertisement. Arrangements for these services generally have terms of up to one year and in some cases the terms may be up to three years. For display advertising on Affiliate sites, we pay TAC to Affiliates for the revenue generated from the display of these advertisements on the Affiliate sites. The display revenue derived from these arrangements that involve traffic supplied by Affiliates is reported on a gross basis (before deducting the TAC paid to Affiliates as cost of revenue—TAC) as we are the primary obligor to the advertisers who are the customers of the display advertising service.

The following table presents display revenue and that revenue as a percentage of total revenue for the periods presented (dollars in thousands):

Display revenue for the year ended December 31, 2015 increased $206 million, or 11 percent, compared to 2014. For the year ended December 31, 2015, the increase in display revenue was driven by increased Affiliate revenue in the Americas, EMEA and Asia Pacific segments of $145 million, $41 million and $33 million, respectively, as well as an increase in display revenue on Yahoo Properties in the Americas segment of $94 million. This was partially offset by declines in display revenue on Yahoo Properties in the EMEA and Asia Pacific segments of $49 million and $58 million, respectively. The increase in Affiliate display revenue for the year ended December 31, 2015 resulted primarily from an increase in video and native advertising, including incremental revenue from the BrightRoll acquisition and an increase in revenue from native advertising on mobile devices. The increase in display revenue on Yahoo Properties in the Americas segment was due to growth in native advertising. The decrease in display revenue on Yahoo Properties in the EMEA and Asia Pacific segments for the year ended December 31, 2015 was primarily driven by declines in volume and pricing of premium and audience advertising, partially offset by an increase in volume of native advertising.

The total increase in display revenue for the year ended December 31, 2015 described above included the impact of unfavorable foreign exchange fluctuations of $68 million using the foreign currency exchange rates from the year ended December 31, 2014.

Display revenue for the year ended December 31, 2014 decreased $82 million, or 4 percent, compared to 2013, primarily due to a mix shift from premium ad units to lower monetizing native ad units. The

decline for the year ended December 31, 2014 was primarily attributable to a decline in advertising revenue on Yahoo Properties in the Americas, EMEA, and Asia Pacific segments of $36 million, $8 million, and $26 million, respectively, and a decline in advertising revenue on Affiliate sites in the EMEA segment of $15 million, partially offset by an increase in advertising revenue on Affiliate sites in the Asia Pacific segment of $3 million.

Other Revenue

Other revenue includes listings-based services revenue, transaction revenue, royalties, patent licenses and fees revenue. Listings-based services revenue is generated from a variety of consumer and business listings-based services, including classified advertising, such as Yahoo Local and other services. We recognize listings-based services revenue when the services are performed. Transaction revenue is generated from facilitating commercial transactions through Yahoo Properties, principally from Yahoo Small Business, Yahoo Travel, and Yahoo Shopping. We recognize transaction revenue when there is evidence that qualifying transactions have occurred. We also receive royalties from Yahoo Japan that are recognized when earned. We received royalties from Alibaba Group through the third quarter of 2015 that were recognized when earned. See Note 8—“Investments in Equity Interests Accounted for Using the Equity Method of Accounting” in the Notes to our consolidated financial statements for additional information on revenue earned from Yahoo Japan and Alibaba Group. Fees revenue consists of revenue generated from a variety of consumer and business fee-based services as well as services for small businesses. We recognize fees revenue when the services are performed.

The following table presents other revenue and that revenue as a percentage of total revenue for the periods presented (dollars in thousands):

Other revenue for the year ended December 31, 2015 decreased $147 million, or 15 percent, compared to 2014, primarily attributable to a decline in fees and listings-based revenue of $79 million and $69 million, respectively. The decline in fees revenue was primarily attributable to a decline in Alibaba Group royalty revenue pursuant to the TIPLA, for which we ceased recognizing fees revenue in September 2014 due to the Alibaba Group IPO. The decline in listings-based revenue was attributable to a decline in auction and exchange fees, shopping traffic, and expiration of a partner agreement. The decline in fees and listings-based revenue was also attributable to declines in Yahoo Small Business associated with a reduction in its subscriber base.

The decline in other revenue for the year ended December 31, 2015 described above included the impact of unfavorable foreign exchange fluctuations of $10 million using the foreign currency exchange rates from the year ended December 31, 2014.

Other revenue for the year ended December 31, 2014 decreased $32 million, or 3 percent, compared to 2013. The decrease for the year ended December 31, 2014 was primarily attributable to a decline in listings-based revenue in the Americas, EMEA and Asia Pacific segments of $47 million, $15 million, and $6 million, respectively, partially offset by an increase in fees revenue in the Americas segment of $37 million. The increase in fees revenue in the Americas segment for the year ended December 31,

2014 was primarily attributable to royalty revenue associated with the patent sale and license agreement that we entered into in the second quarter of 2014. See Note 4—“Acquisitions and Dispositions” in the Notes to our consolidated financial statements for additional information.

We expect other revenue to decline in 2016, as compared to 2015, as a result of completing the recognition of deferred revenue under the TIPLA with Alibaba Group in the third quarter of 2015, for which we no longer recognize associated fees revenue.

Search and Display Metrics

We present information below regarding the number of “Paid Clicks” and “Price-per-Click” for search and the number of “Ads Sold” and “Price-per-Ad” for display. This information is derived from internal data.

“Paid Clicks” are defined as clicks by end-users on sponsored search listings (excluding native ad units, which are defined as display ads that appear in the content streams viewed by users) on Yahoo Properties and Affiliate sites. Advertisers generally pay for sponsored search listings on a per-click basis. “Search click-driven revenue” is gross search revenue (GAAP search revenue plus the related revenue share with third parties), excluding the Microsoft RPS Guarantee and search revenue from Yahoo Japan. “Price-per-Click” is defined as search click-driven revenue divided by our total number of Paid Clicks.

“Ads Sold” consist of display ad impressions for paying advertisers on Yahoo Properties (including mobile) and Affiliate sites (including Flurry and BrightRoll). “Price-per-Ad” is defined as display revenue from Yahoo Properties (including mobile) and Affiliate sites (including Flurry and BrightRoll) divided by our total number of Ads Sold. Our price and volume metrics for display are based on display revenue which we report on a gross basis (before TAC), and include data for graphical, sponsorship, and native ad units on Yahoo Properties (including mobile) and Affiliate sites (including Flurry and BrightRoll).

We periodically review, refine and update our methodologies for monitoring, gathering, and counting number of Paid Clicks and Ads Sold and for calculating search click-driven revenue, Price-per-Click, and Price-per-Ad. Commencing in the first quarter 2015, our display price and volume metrics (Price-per-Ad and Ads Sold) include (a) results from Yahoo Properties worldwide (other than Japan, where Yahoo branded sites are operated by third-party licensees), whereas previously those metrics excluded countries and regions where historical data was not previously retained in a manner that would support period-to-period comparisons; (b) results from Affiliate sites (including Affiliates of Flurry and BrightRoll) and (c) historical Tumblr data commencing in the three months ended June 30, 2013, whereas previously Tumblr data was limited to (i) native ad results commencing in the three months ended March 31, 2014 and (ii) other display ad results commencing in the three months ended September 30, 2014. Prior period amounts have been updated to conform to the current presentation.

Search Metrics

For the year ended December 31, 2015, Paid Clicks increased 6 percent and Price-per-Click increased 2 percent, compared to 2014. The increase in Paid Clicks for the year ended December 31, 2015 was primarily attributable to an increase in Paid Clicks on Yahoo Properties in the Americas segment, attributable to our agreements with Mozilla and other distribution partners, partially offset by a decline in Paid Clicks from Affiliate and Yahoo traffic. The increase in Price-per-Click for year ended December 31, 2015 was attributable to a higher mix of traffic from the Americas segment, which is higher monetizing as compared to other segments, as well as improved pricing from Affiliate traffic.

Improvements in the search metrics resulted in year-over-year growth of 9 percent in search click-driven revenue for the year ended December 31, 2015.

For the year ended December 31, 2014, Paid Clicks increased 5 percent and Price-per-Click increased 11 percent, compared to 2013. The increase in Paid Clicks for the year ended December 31, 2014 was attributable to an increase in Paid Clicks on Yahoo Properties from distribution partners primarily in the Americas segment, partially offset by a decline in Paid Clicks on Affiliate sites related to traffic quality initiatives across the segments. The increase in Price-per-Click for the year ended December 31, 2014 was primarily driven by a higher mix of traffic from the Americas segment, which is higher monetizing as compared to other segments, and improved Affiliate traffic quality across all segments resulting in higher Price-per-Click. Improvements in Price-per-Click resulted in year-over-year growth in search click-driven revenue for the year ended December 31, 2014 of 17 percent.

Display Metrics

For the year ended December 31, 2015, number of Ads Sold increased 12 percent and Price-per-Ad increased 2 percent, compared to 2014. The increase in Ads Sold year-over-year for the year ended December 31, 2015 was attributable to an increase in native and video ad units sold which was partially offset by a decline in premium ad units sold. The increase in native ad units sold was primarily attributable to growth internationally and growth in our network of mobile apps. Native ad units represented approximately 44 percent of total Ads Sold for the year ended December 31, 2015, as compared to 31 percent of total Ads Sold for the year ended December 31, 2014. The increase in Price-per-Ad was due to improved pricing for native advertising and video representing a larger share of the inventory mix, partially offset by a shift in the mix of Ads Sold from premium advertising to native advertising.

For the year ended December 31, 2014, number of Ads Sold increased 6 percent and Price-per-Ad decreased 9 percent, compared to 2013. The increase in number of Ads Sold for the year ended December 31, 2014 was attributable to an increase in native ad units sold, partially offset by a decline in audience Ads Sold. Native ad units were launched late in the second quarter of 2013. Native ad units represented approximately 31 percent of total Ads Sold for the year ended December 31, 2014, as compared to 5 percent of total Ads Sold for the year ended December 31, 2013. The decrease in Price-per-Ad for the year ended December 31, 2014 was due to a shift in the mix of Ads Sold toward lower monetizing native ad units.

Operating Costs and Expenses

Cost of Revenue—TAC

Cost of revenue—TAC consists of payments made to third-party entities that have integrated our advertising offerings into their websites or other offerings and payments made to companies that direct consumer and business traffic to Yahoo Properties. We enter into agreements of varying duration that involve TAC. There are generally two economic structures of the Affiliate agreements: fixed payments with or without a guaranteed minimum amount of traffic delivered or variable payments based on a percentage of our revenue or based on a certain metric, such as number of searches or paid clicks. We expense TAC under two different methods. Agreements with fixed payments are expensed ratably over the term the fixed payment covers or as traffic is delivered. Agreements based on a percentage of revenue, number of searches, or other metrics are expensed based on the volume of the underlying activity or revenue multiplied by the agreed-upon price or rate. We also have an agreement to compensate Mozilla for making us the default search provider on certain of Mozilla’s products in the United States. We record those payments as cost of revenue—TAC.

The following table presents cost of revenue—TAC and those expenses as a percentage of revenue for the periods presented (dollars in thousands):

Cost of revenue—TAC for the year ended December 31, 2015 increased $660 million, or 303 percent, compared to 2014, primarily due to increased payments to distribution partners (including Mozilla which contributed $375 million) as well as increased TAC associated with Gemini, and incremental TAC from the BrightRoll acquisition.

Cost of revenue—TAC for the year ended December 31, 2014 decreased $37 million, or 15 percent, compared to 2013. The decrease for the year ended December 31, 2014, compared to 2013, was primarily attributable to declines in TAC in the Asia Pacific and EMEA segments of $38 million and $6 million, respectively, partially offset by an increase in TAC in the Americas segment of $8 million related to an increase in search and listings-based TAC. The decline in the Asia Pacific segment was primarily attributable to the required change in revenue presentation for transitioned markets from a gross (before TAC) basis to a net (after TAC).

We expect cost of revenue—TAC to continue to grow in 2016 as a result of an increase in traffic on Affiliate sites through our Gemini platform across search and native advertising.

Cost of Revenue—Other

Cost of revenue—other consists of bandwidth costs, stock-based compensation, content and other expenses associated with the production and usage of Yahoo Properties, including content expense and amortization of developed technology and patents. Cost of revenue—other also includes costs for Yahoo’s technology platforms and infrastructure, including depreciation expense and other operating costs, directly related to revenue generating activities.

The following table presents cost of revenue—other and those expenses as a percentage of revenue for the periods presented (dollars in thousands):

Cost of revenue—other increased $30 million, or 3 percent, for the year ended December 31, 2015, compared to 2014, primarily due to higher cost of revenue of $48 million related to algorithmic serving costs, our e-commerce business in the Asia Pacific segment, BrightRoll video advertising fees, an increase in depreciation and amortization expense of $16 million, and an increase in content expense of $13 million. This increase in cost of revenue—other was partially offset by declines in bandwidth costs of $21 million, stock-based compensation expense of $10 million, and compensation costs of $17 million.

Cost of revenue—other increased $75 million, or 7 percent, for the year ended December 31, 2014, compared to 2013, due to increases in compensation costs of $59 million, stock-based compensation expense of $27 million and credit card fees of $5 million, partially offset by a decline in depreciation and amortization expense of $22 million.

Sales and Marketing

Sales and marketing expenses consist primarily of advertising and other marketing-related expenses, compensation-related expenses (including stock-based compensation expense), sales commissions, and travel costs.

The following table presents sales and marketing expenses and those expenses as a percentage of revenue for the periods presented (dollars in thousands):

Sales and marketing expenses for the year ended December 31, 2015 decreased $4 million, compared to 2014, primarily attributable to declines in compensation costs of $52 million, stock-based compensation expense of $4 million and travel and entertainment expense of $4 million, partially offset by an increase in marketing expense of $38 million, bad debt expense of $14 million, and outside service provider expenses of $5 million. The decline in compensation costs was primarily attributable to a 17 percent decrease in headcount year-over-year. The increase in marketing expense was primarily due to costs associated with a partner deal entered into in 2015 and brand marketing campaigns in 2015 for which there were no similar campaigns in 2014.

Sales and marketing expenses for the year ended December 31, 2014 increased $1 million, compared to 2013. For the year ended December 31, 2014, stock-based compensation expense increased $44 million, and marketing and public relations expense increased $14 million. These increases were partially offset by declines in compensation costs of $25 million, travel and entertainment expense of $12 million, outside service provider expenses of $12 million and depreciation and amortization expense of $6 million. The increase in stock-based compensation expense for the year ended December 31, 2014 was attributable to an increase in the number of awards being expensed at a higher fair value. The increase in marketing and public relations expense for the year ended December 31, 2014 was primarily due to increased media advertising and spend on promotional event management.

Product Development

Product development expenses consist primarily of compensation-related expenses (including stock-based compensation expense) incurred for the development of, enhancements to and maintenance of Yahoo Properties, classification and organization of listings within Yahoo Properties, research and development, and Yahoo’s technology platforms and infrastructure. Depreciation expense and other operating costs are also included in product development.

The following table presents product development expenses and those expenses as a percentage of revenue for the periods presented (dollars in thousands):

Product development expenses for the year ended December 31, 2015 increased $22 million, or 2 percent, compared to 2014, primarily attributable to an increase of $51 million in stock-based compensation expense, as well as an increase in investment activities supporting our search, communications and other product initiatives of $35 million. This increase was partially offset by a decline in depreciation and amortization expense of $37 million, facilities and equipment expense of $15 million and compensation costs of $11 million. The increase in stock-based compensation expense was due to an increase in the number of awards granted at a higher fair value. The decline in compensation costs is primarily attributable to a 17 percent decline in headcount year-over-year, as well as a decline in transition and relocation costs.

Product development expenses for the year ended December 31, 2014 increased $199 million, or 21 percent, compared to 2013, primarily attributable to increases in compensation costs of $141 million, stock-based compensation expense of $56 million, and a decline in capitalizable projects of $38 million, partially offset by declines in depreciation and amortization expense of $12 million, outside service provider expense of $14 million, and travel and entertainment expense of $10 million. The increase in compensation costs for the year ended December 31, 2014 was primarily attributable to a 6 percent increase in headcount year-over-year, including incremental headcount for mobile and search as well as merit-based increases in salaries, increases in costs from a shift in location of employees, increases in benefits, increased headcount from acquisitions, and increases in incentive compensation. The increase in stock-based compensation expense for the year ended December 31, 2014 was attributable to an increase in the number of awards being expensed at a higher fair value and an increase in expense related to equity assumed and granted related to acquisitions.

General and Administrative

General and administrative expenses consist primarily of compensation-related expenses (including stock-based compensation expense) related to other corporate departments and fees for professional services.

The following table presents general and administrative expenses and those expenses as a percentage of revenue for the periods presented (dollars in thousands):

General and administrative expenses for the year ended December 31, 2015 increased $2 million, compared to 2014, primarily attributable to increases of $26 million due to net gains on disposal of assets, business tax refunds received and legal settlements in 2014 for which there are no similar

benefits in 2015, $14 million in depreciation and amortization expense, travel and entertainment expense of $4 million and marketing and public relations expense of $4 million. These increases in general and administrative expenses were partially offset by declines in facilities and equipment expense of $16 million, outside service provider expense of $16 million and compensation costs of $14 million. The decline in compensation costs was primarily attributable to a 19 percent decline in headcount year-over-year.

General and administrative expenses for the year ended December 31, 2014 increased $19 million, or 3 percent, compared to 2013, due to increases in stock-based compensation expense of $16 million, outside service provider expense of $3 million, facilities and equipment expense of $16 million, and compensation costs of $2 million. These increases were partially offset by a decline in depreciation and amortization expense of $4 million, benefits related to net gains on disposal of assets of $9 million and business tax refunds received of $6 million. The increase in stock-based compensation expense for the year ended December 31, 2014 was attributable to an increase in the number of awards being expensed at a higher fair value.

Amortization of Intangibles

We have purchased, and expect to continue purchasing, assets and/or businesses, which may include the purchase of intangible assets. Intangible assets include customer, affiliate, and advertiser-related relationships and tradenames, trademarks and domain names. Amortization of developed technology and patents is included in the cost of revenue—other, and not in amortization of intangibles.

The following table presents amortization of intangibles and those expenses as a percentage of revenue for the periods presented (dollars in thousands):

Amortization of intangibles for the year ended December 31, 2015 increased $12 million, or 18 percent, compared to 2014, primarily driven by incremental amortization of intangible assets related to BrightRoll, which we acquired in the fourth quarter of 2014, as well as incremental amortization of intangibles assets related to companies acquired in 2015.

Amortization of intangibles for the year ended December 31, 2014 increased $22 million, or 49 percent, compared to 2013, primarily driven by amortization of intangible assets related to Tumblr, which we acquired in the second quarter of 2013.

Gain on Sales of Patents

The following table presents gain on sales of patents and those gains as a percentage of revenue for the periods presented (dollars in thousands):

For the year ended December 31, 2015, we sold certain patents and recorded a gain on sales of patents of approximately $11 million.

For the year ended December 31, 2014, we sold certain patents and recorded a gain on sales of patents of approximately $98 million. The gain on sales of patents include patents sold to a wholly-owned affiliate of Alibaba Group for a gain on sale of $24 million and patents sold to Yahoo Japan for a gain on sale of $12 million.

For the year ended December 31, 2013, we sold certain patents and recorded a gain on sales of patents of approximately $80 million. The gain on sales of patents was primarily related to a patent sale agreement with a wholly-owned affiliate of Alibaba Group entered into during 2013 for $70 million.

See Note 4—“Acquisitions and Dispositions” in the Notes to our consolidated financial statements for additional information.

Asset Impairment Charge

The following table presents asset impairment charge and those charges as a percentage of revenue for the periods presented (dollars in thousands):

During the year ended December 31, 2015, we recorded an asset impairment charge of $16 million related to originally developed content equal to the amount by which the unamortized cost of the originally developed content exceeded its estimated fair value and $28 million for acquired content equal to the amount by which the unamortized cost of the acquired content exceeded its net realizable value.

Goodwill Impairment Charge

The following table presents goodwill impairment charge and those charges as a percentage of revenue for the periods presented (dollars in thousands):

During 2015, we recorded a $4,461 million goodwill impairment charge. The impairments were a result of a combination of factors, including a sustained decrease in our market capitalization in the fourth quarter of 2015 and lower estimated projected revenue and profitability in the near term. We concluded that the carrying value of our U.S. & Canada, Europe, Tumblr, and Latin America reporting units exceeded their respective estimated fair values and recorded a goodwill impairment charge of approximately $3,692 million, $531 million, $230 million and $8 million, respectively.

During 2014, we recorded an $88 million goodwill impairment charge for the Middle East and India & Southeast Asia reporting units. The impairment resulted from a decline in business conditions in the Middle East and India & Southeast Asia during the latter half of 2014.

During 2013, we recorded a $64 million goodwill impairment charge for the Middle East reporting unit. The impairment resulted from a decline in business conditions in the Middle East during the latter half of 2013.

See Note 5—“Goodwill” in the Notes to our consolidated financial statements and “Critical Accounting Policies—Goodwill” within Management’s Discussion and Analysis for additional information.

Intangibles Impairment Charge

The following table presents intangibles impairment charge and those charges as a percentage of revenue for the periods presented (dollars in thousands):

In the fourth quarter of 2015, we reviewed both definite-lived and indefinite-lived intangible assets for impairment. No impairment was identified for definite-lived intangibles. For indefinite-lived intangibles, we performed a quantitative test comparing the fair value of the indefinite-lived intangible assets with their carrying amount and recorded an impairment charge of $15 million related to certain indefinite-lived intangible assets in the EMEA segment. See Intangible Assets within Note 1—“The Company And Summary Of Significant Accounting Policies” and Note 6—“Intangible Assets, Net” in the Notes to our consolidated financial statements for additional information.

Restructuring Charges, Net

Restructuring charges, net was comprised of the following (dollars in thousands):

We have implemented various restructuring plans to reduce our cost structure, align resources with our product strategy and improve efficiency, which have resulted in workforce reductions and the consolidation of certain real estate facilities and data centers. For the year ended December 31, 2015, we recorded expense of $69 million, $31 million, and $4 million related to the Americas, EMEA, and Asia Pacific segments, respectively. For the year ended December 31, 2014, we recorded expense of

$76 million, $25 million, and $2 million related to the Americas, EMEA, and Asia Pacific segments, respectively. For the year ended December 31, 2013, we recorded expense of $1 million, $3 million, and less than $1 million related to the Americas, EMEA, and Asia Pacific segments, respectively. The amounts recorded during the year ended December 31, 2015 were primarily related to severance, facility and other related costs pursuant to restructuring plans that we initiated in 2015. The amounts recorded during the year ended December 31, 2014 were primarily related to the consolidation of a data center as we ceased use of that facility pursuant to a restructuring plan we initiated in 2011 and severance charges related to restructuring plans that we initiated in 2014 as part of our location strategy and to align resources. The amounts recorded during the year ended December 31, 2013 were part of our continued efforts to streamline our operations and focus our resources.

The $66 million restructuring liability as of December 31, 2015 consists of $15 million for employee severance expenses, which we expect to pay out by the end of the second quarter of 2017, and $51 million related to non-cancelable lease costs, which we expect to pay over the terms of the related obligations through the fourth quarter of 2025, less estimated sublease income.

In connection with our strategic plan, which we announced on February 2, 2016 would include reducing our workforce by approximately 15 percent by the end of 2016 and exiting five offices, we expect to incur cash charges for severance pay expenses and related cash expenditures, and in connection with the consolidation and exit of facilities, and non-cash charges related to stock-based compensation expense and impairment costs.

See Note 20—“Subsequent Events” in the Notes to our consolidated financial statements for additional information.

Other Income (Expense), Net

Other income (expense), net was as follows (dollars in thousands):

Interest, dividend, and investment income consists of income earned from cash and cash equivalents in bank accounts, marketable debt securities, and dividend income on the Alibaba Group Preference Shares prior to the redemption of such shares in May 2013. Interest, dividend and investment income increased $8 million for the year ended December 31, 2015, compared to 2014, primarily due to an increase in interest income. Interest, dividend, and investment income decreased $31 million for the year ended December 31, 2014, compared to 2013, primarily due to dividend income on the Alibaba Group Preference Shares received during the year ended December 31, 2013, for which there was no similar income for the year ended December 31, 2014.

Interest expense is related to the $1.4375 billion of Notes we issued in November 2013, interest expense on notes payable related to building obligations, and capital lease obligations for data centers. Interest expense increased $3 million and $54 million for the years ended December 31, 2015 and 2014, respectively, compared to 2014 and 2013, respectively, primarily due to the accreted non-cash interest expense related to the Notes.

For the year ended December 31, 2014, we recorded a pre-tax gain of approximately $10 billion related to the sale of Alibaba Group ADSs.

We hold warrants that vested upon the December 12, 2014 initial public offering of Hortonworks Inc. (“Hortonworks”), which entitle us to purchase an aggregate of 3.7 million shares of Hortonworks common stock upon exercise of the warrants. We hold 6.5 million preferred warrants that are exercisable for 3.25 million shares of common stock at an exercise price of $0.01 per share, as well as 0.5 million common warrants that are exercisable for 0.5 million shares of common stock at an exercise price of $8.46 per share. We determined the estimated fair value of the warrants using the Black-Scholes model. For the year ended December 31, 2015, we recorded a loss of $19 million due to the change in estimated fair value of the Hortonworks warrants during the period, which was recorded through other income, net in our consolidated statements of operations. During the year ended December 31, 2014, we recorded a gain of $57 million upon the initial public offering of Hortonworks and a $41 million gain related to the mark to market of the warrants held as of December 31, 2014, which were included within other income, net on the consolidated statements of operations.

Foreign exchange losses consists of foreign exchange gains and losses due to re-measurement of monetary assets and liabilities denominated in non-functional currencies, and unrealized and realized foreign currency transaction gains and losses, including gains and losses related to balance sheet hedges.

Other consists of gains from other non-operational items.

Other income (expense), net may fluctuate in future periods due to changes in our average investment balances, changes in interest and foreign exchange rates, changes in the fair value of foreign currency forward contracts, realized gains and losses on investments, and impairments of investments.

Income Taxes

The benefit for income taxes for the year ended December 31, 2015 differs from the amount computed by applying the federal statutory income tax rate to income before benefit for income taxes and earnings in equity interests as follows (dollars in thousands):

Significant variances year-over-year as shown above are further explained as follows:

(3)	In 2013, we settled the IRS income tax examination for the 2005 and 2006 returns resulting in a benefit of approximately $54 million. In 2014, we settled the IRS income tax examination for the 2007 through 2010 returns resulting in a benefit of approximately $25 million.

As of December 31, 2015, we do not anticipate repatriating our undistributed foreign earnings of approximately $3.3 billion. Those earnings are principally related to our equity method investment in Yahoo Japan. If those earnings were to be repatriated in the future, we may be subject to additional U.S. income taxes (subject to an adjustment for foreign tax credits). It is not practicable to determine the income tax liability that might be incurred if these earnings were to be repatriated.

On July 27, 2015, the United States Tax Court issued an opinion inAltera Corp. et al. v. Commissioner, which invalidated the 2003 final Treasury rule that requires participants in qualified cost-sharing arrangements to share stock-based compensation costs. Based on the decision of the Tax Court, we could be entitled to an income tax benefit by excluding stock-based compensation costs from our cost sharing with affiliated entities for the period of time that we had the cost-sharing structure in place. The IRS has until the first quarter of 2016 to appeal this Tax Court decision. There is uncertainty related to the IRS response to the Tax Court opinion, the final resolution of this issue, and the potential favorable benefits to us. We will continue to monitor developments related to this opinion and the potential impact of those developments on our current and prior fiscal years.

Our gross amount of unrecognized tax benefits as of December 31, 2015 was $1.1 billion, of which $1.0 billion is recorded on our consolidated balance sheets. The gross unrecognized tax benefits as of December 31, 2015 increased by $43 million from the recorded balance as of December 31, 2014 primarily related to transfer prices among entities in different tax jurisdictions.

We are in various stages of examination and appeal in connection with our taxes both in the U.S. and in foreign jurisdictions. Those audits generally span tax years 2005 through 2014. As of December 31, 2015, our 2011 through 2013 U.S. federal income tax returns are currently under examination. We have appealed the proposed California Franchise Tax Board’s adjustments to the 2005 through 2008 returns, but no conclusions have been reached to date. While it is difficult to determine when the examinations will be settled or their final outcomes, certain audits in various jurisdictions are expected to be resolved in the foreseeable future. We believe that we have adequately provided for any reasonably foreseeable adverse adjustment to our tax returns and that any settlement will not have a material adverse effect on our consolidated financial position, results of operations, or cash flows. It is reasonably possible that our unrecognized tax benefits could be reduced by up to approximately $149 million in the next twelve months.

In the first quarter of 2015, we satisfied the $3.3 billion income tax liability related to the sale by YHK, our wholly-owned subsidiary, of Alibaba Group ADSs in the Alibaba Group IPO on September 24, 2014. As of December 31, 2015, we accrued deferred tax liabilities of $12.6 billion associated with the Alibaba Group shares that we retained. Such deferred tax liabilities will be subject to periodic adjustments due to changes in the fair value of the Alibaba Group shares.

We may have additional tax liabilities in China related to the sale to Alibaba Group of 523 million Alibaba Group shares that took place during the year ended December 31, 2012 and related to the sale of 140 million Alibaba Group ADSs sold in the Alibaba Group IPO that took place during the year ended December 31, 2014. Any taxes assessed and paid in China are expected to be ultimately offset and recovered in the U.S. through the use of foreign tax credits.

Tax authorities from the Brazilian State of Sao Paulo have assessed certain indirect taxes against our Brazilian subsidiary, Yahoo! do Brasil Internet Ltda., related to online advertising services. The assessment is for calendar years 2008 through 2011 and as of December 31, 2015 totals approximately $92 million. We currently believe the assessment is without merit. We believe the risk of loss is remote and have not recorded an accrual for the assessment.

Earnings in Equity Interests

We record our share of the results of earnings in equity interests, including tax impacts, one quarter in arrears, within earnings in equity interests in the consolidated statements of operations.

The following table presents earnings in equity interests for the periods presented (dollars in thousands):

The decrease for the year ended December 31, 2015, compared to 2014, was due primarily to the change in accounting for our investment in Alibaba Group, which we now record as a marketable equity security. Commencing with the Alibaba Group IPO in September 2014, we no longer use the equity method to account for our interest in Alibaba Group, and our earnings in equity interests and net income have been and will continue to be materially lower. Earnings in equity interests increased during the year ended December 31, 2014, compared to 2013, primarily due to continued improved financial performance for Alibaba Group, which was offset in part by a significant decline in earnings in equity interests during the fourth quarter of 2014, following Alibaba Group’s IPO.

See Note 8—“Investments in Equity Interests Accounted for Using the Equity Method of Accounting” in the Notes to our consolidated financial statements for additional information.

Noncontrolling Interests

Noncontrolling interests represent the noncontrolling holders’ percentage share of income or losses from the subsidiaries in which we hold a majority, but less than 100 percent, ownership interest and the results of which are consolidated in our consolidated financial statements. Noncontrolling interests were approximately $8 million in 2015, compared to $10 million in 2014 and $10 million in 2013. Noncontrolling interests recorded in 2015, 2014, and 2013 were related to the Yahoo!7 venture in Australia and New Zealand.

Segment Reporting

We continue to manage our business geographically. The primary areas of measurement and decision making are currently the Americas, EMEA and Asia Pacific. Management relies on an internal reporting process that provides revenue, revenue ex-TAC, direct costs excluding TAC by segment, and consolidated income (loss) from operations for making decisions related to the evaluation of the financial performance of, and allocating resources to, our segments.