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Twitter

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FY2014 Annual Report · Twitter
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ANNUAL REPORT
2 0 1 4

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About Twitter, Inc. 

Twitter is a global platform for public self-expression and conversation in real time. 

By developing a fundamentally new way for people to create, distribute and discover 

content, we have democratized content creation and distribution, enabling any voice 

to echo around the world instantly and unfiltered. The service can be accessed at 

Twitter.com, via the Twitter mobile application and via text message. Available in 

more than 35 languages, Twitter has more than 288 million monthly active users. For 

more information, visit discover.twitter.com or follow @Twitter.

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

FORM 10-K  

(Mark One)  
⌧  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE 

ACT OF 1934  

For the fiscal year ended December 31, 2014  
OR  
(cid:133)  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE 

ACT OF 1934  

FOR THE TRANSITION PERIOD FROM                      TO                       
Commission File Number 001-36164  

Twitter, Inc.  
(Exact name of registrant as specified in its charter)  

Delaware 
(State or other jurisdiction 
of incorporation or organization) 

20-8913779 
(I.R.S. Employer 
Identification No.) 

1355 Market Street, Suite 900  
San Francisco, California 94103  
(Address of principal executive offices and Zip Code)  
(415) 222-9670  
(Registrant’s telephone number, including area code)  

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

Title of each class 
Common Stock, Par Value $0.000005 Per Share 

Name of each exchange on which registered 
New York Stock Exchange 

Securities registered pursuant to Section 12(g) of the Act: None  
Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    YES  ⌧    NO  (cid:133)  

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act.    YES  (cid:133)    NO  ⌧  

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  ⌧    NO  (cid:133)  

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  ⌧    NO   (cid:133)  

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.   ⌧  

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 the definition of “large accelerated filer”, “accelerated filer”, and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):  

Large accelerated filer 

⌧  

Non-accelerated filer 

(cid:133)  (Do not check if a smaller reporting company) 

Accelerated filer 

Smaller reporting company 

(cid:133)

(cid:133)

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    YES  (cid:133)    NO  ⌧  

The aggregate market value of the voting and non-voting common equity held by non-affiliates of the registrant, based on the closing price of a share of 
the registrant’s common stock on June 30, 2014 as reported by the New York Stock Exchange on such date was approximately $13,682,971,032.  
Shares of the registrant’s common stock held by each executive officer, director and holder of 5% or more of the outstanding common stock have been 
excluded in that such persons may be deemed to be affiliates.  This calculation does not reflect a determination that certain persons are affiliates of the 
registrant for any other purpose. 

The number of shares of the registrant’s common stock outstanding as of February 17, 2015 was 647,836,523.  

Portions of the registrant’s Definitive Proxy Statement relating to the Annual Meeting of Stockholders are incorporated by reference into Part III of this 
Annual Report on Form 10-K where indicated. Such Definitive Proxy Statement will be filed with the Securities and Exchange Commission within 120 
days after the end of the registrant’s fiscal year ended December 31, 2014.  

  
  
  
 
 
  
  
  
  
  
 
 
 
  
 
 
 
TABLE OF CONTENTS  

PART I 

  Page

Item 1.  Business ...........................................................................................................................................................   

Item 1A. Risk Factors ......................................................................................................................................................   

Item 1B. Unresolved Staff Comments ............................................................................................................................   

Item 2.  Properties .........................................................................................................................................................   

Item 3.  Legal Proceedings ............................................................................................................................................   

Item 4.  Mine Safety Disclosures ...................................................................................................................................   

PART II 

Item 5.  Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity 

Securities ..........................................................................................................................................................   

Item 6.  Selected Financial Data ...................................................................................................................................   

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

Item 7A. Quantitative and Qualitative Disclosures About Market Risk ...........................................................................   

Item 8.  Financial Statements and Supplementary Data ...............................................................................................   

Item 9.  Changes in and Disagreements With Accountants on Accounting and Financial Disclosure .........................   

Item 9A. Controls and Procedures ..................................................................................................................................   

Item 9B. Other Information..............................................................................................................................................   

5

11

36

36

37

37

38

40

43

62

63

98

98

98

PART III 

Item 10. Directors, Executive Officers and Corporate Governance ...............................................................................    100

Item 11. Executive Compensation ..................................................................................................................................    100

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters ........    100

Item 13. Certain Relationships and Related Transactions, and Director Independence ...............................................    100

Item 14. Principal Accounting Fees and Services ..........................................................................................................    100

PART IV 

Item 15. Exhibits, Financial Statement Schedules .........................................................................................................    101

Signatures ........................................................................................................................................................    102

2 

 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS  

This Annual Report on Form 10-K contains forward-looking statements within the meaning of Section 27A of the 

Securities Act of 1933, as amended, as Section 21E of the Securities Exchange Act of 1934, as amended, which 
statements involve substantial risks and uncertainties. Forward-looking statements generally relate to future events or our 
future financial or operating performance. In some cases, you can identify forward-looking statements because they 
contain words such as “may,” “will,” “should,” “expects,” “plans,” “anticipates,” “could,” “intends,” “target,” “projects,” 
“contemplates,” “believes,” “estimates,” “predicts,” “potential” or “continue” or the negative of these words or other similar 
terms or expressions that concern our expectations, strategy, plans or intentions. Forward-looking statements contained 
in this Annual Report on Form 10-K include, but are not limited to, statements about:  

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

our ability to attract and retain users and increase the level of engagement of our users;  

our ability to develop or acquire new products and services, improve our existing products and services and 
increase the value of our products and services;  

our business strategies, including our plans for growth; 

our ability to attract advertisers to our platform and increase the amount that advertisers spend with us;  

our expectations regarding our user growth rate and the continued usage of our mobile applications;  

our ability to increase our revenue and our revenue growth rate;  

our ability to improve user monetization, including of our logged out and syndicated audiences;  

our future financial performance, including trends in cost per ad engagement, revenue, cost of revenue, 
operating expenses and income taxes;  

our expectations regarding outstanding litigation; 

the effects of seasonal trends on our results of operations;  

the sufficiency of our cash and cash equivalents and cash generated from operations to meet our working 
capital and capital expenditure requirements;  

our ability to timely and effectively scale and adapt our existing technology and network infrastructure;  

our ability to successfully acquire and integrate companies and assets; and  

our ability to successfully enter new markets and manage our international expansion, including our ability to 
operate in those countries.  

We caution you that the foregoing list may not contain all of the forward-looking statements made in this Annual 

Report on Form 10-K.  

You should not rely upon forward-looking statements as predictions of future events. We have based the forward-
looking statements contained in this Annual Report on Form 10-K primarily on our current expectations and projections 
about future events and trends that we believe may affect our business, financial condition, operating results, cash flows 
or prospects. The outcome of the events described in these forward-looking statements is subject to risks, uncertainties 
and other factors described in the section titled “Risk Factors” and elsewhere in this Annual Report on Form 10-K. 
Moreover, we operate in a very competitive and rapidly changing environment. New risks and uncertainties emerge from 
time to time and it is not possible for us to predict all risks and uncertainties that could have an impact on the forward-
looking statements contained in this Annual Report on Form 10-K. We cannot assure you that the results, events and 
circumstances reflected in the forward-looking statements will be achieved or occur, and actual results, events or 
circumstances could differ materially from those described in the forward-looking statements.  

The forward-looking statements made in this Annual Report on Form 10-K relate only to events as of the date on 

which the statements are made. We undertake no obligation to update any forward-looking statements made in this 
Annual Report on Form 10-K to reflect events or circumstances after the date of this Annual Report on Form 10-K or to 
reflect new information or the occurrence of unanticipated events, except as required by law. We may not actually achieve 
the plans, intentions or expectations disclosed in our forward-looking statements and you should not place undue reliance 
on our forward-looking statements. Our forward-looking statements do not reflect the potential impact of any future 
acquisitions, mergers, dispositions, joint ventures or investments we may make.  

3 

 
 
NOTE REGARDING KEY METRICS 

We review a number of metrics, including monthly active users, or MAUs, timeline views, timeline views per MAU 
and advertising revenue per timeline view, to evaluate our business, measure our performance, identify trends affecting 
our business, formulate business plans and make strategic decisions. See the section titled “Management’s Discussion 
and Analysis of Financial Condition and Results of Operations—Key Metrics” for a discussion of how we calculate MAUs, 
timeline views, timeline views per MAU and advertising revenue per timeline view. 

The numbers of active users and timeline views presented in this Annual Report on Form 10-K are based on internal 

company data. While these numbers are based on what we believe to be reasonable estimates for the applicable period 
of measurement, there are inherent challenges in measuring usage and user engagement across our large user base 
around the world. For example, there are a number of false or spam accounts in existence on our platform. We have 
performed an internal review of a sample of accounts and estimate that false or spam accounts represented less than 5% 
of our MAUs as of December 31, 2014. In making this determination, we applied significant judgment, so our estimation of 
false or spam accounts may not accurately represent the actual number of such accounts, and the actual number of false 
or spam accounts could be higher than we have estimated. We are continually seeking to improve our ability to estimate 
the total number of spam accounts and eliminate them from the calculation of our active users, and in the past have made 
improvements in our spam detection capabilities that have resulted in the suspension of a large number of accounts. 
Spam accounts that we have identified are not included in the active user numbers presented in this Annual Report on 
Form 10-K. We treat multiple accounts held by a single person or organization as multiple users for purposes of 
calculating our active users because we permit people and organizations to have more than one account. Additionally, 
some accounts used by organizations are used by many people within the organization. As such, the calculations of our 
active users may not accurately reflect the actual number of people or organizations using our platform. 

Our metrics are also affected by applications that automatically contact our servers for regular updates with no 

discernible user action involved, and this activity can cause our system to count the users associated with such 
applications as active users on the day or days such contact occurs. In the three months ended December 31, 2014, 
approximately 8.5% of users used third party applications that may have automatically contacted our servers for regular 
updates without any discernible additional user-initiated action.  As such, the calculations of MAUs presented in this 
Annual Report on Form 10-K may be affected as a result of this activity. 

In addition, our data regarding user geographic location for purposes of reporting the geographic location of our 
MAUs is based on the IP address associated with the account when a user initially registered the account on Twitter. The 
IP address may not always accurately reflect a user’s actual location at the time such user engaged with our platform. 

We present and discuss timeline views in this Annual Report on Form 10-K. We have estimated a small percentage 

of timeline views in the three months ended September 30, 2013 to account for certain timeline views that were logged 
incorrectly during the quarter as a result of a product update. We believe this estimate to be reasonable, but the actual 
numbers could differ from our estimate.  Additionally, the ongoing optimization of our products has reduced the number of 
times a user needs to request a timeline view.  As a result, our management team believes timeline views have become 
an unrepresentative measure of, and will not use them internally to measure for, user engagement on our platform.  As we 
announced on November 12, 2014, we do not intend to disclose timeline views for any future period.  They are presented 
here only for historical purposes.    

We regularly review and may adjust our processes for calculating our internal metrics to improve their accuracy. Our 
measures of user growth and user engagement may differ from estimates published by third parties or from similarly-titled 
metrics of our competitors due to differences in methodology. 

4 

 
 
 
Item 1. BUSINESS  
Overview  

PART I  

The mission we serve as Twitter, Inc. is to give everyone the power to create and share ideas and information 
instantly without barriers.  We offer products and services for users, advertisers, developers and platform and data 
partners.  Our goal is to reach the largest daily audience in the world through our information sharing and distribution 
platform products.  We believe our audience is not limited to our users on the Twitter platform, but rather extends to a 
larger global audience.  

We intend to leverage our unique content to reach this larger audience by creating value for all potential users of our 

platform.  Our current strategy for 2015 consists of three primary objectives: 

• 

• 

• 

Strengthen the Core.  Our goal is to grow our active users by improving the new user experience, increasing 
the breadth and depth of our content with deeper integration of rich media, and upgrading our direct messaging 
features to allow users to move fluidly between public and private conversation on Twitter. 

Reduce Barriers to Consumption.  We are focused on better organizing our content so that it is relevant for 
each and every type of user, whether logged-in, logged-out or on syndicated partner applications. 

Deliver New Applications and Services.  It is our objective to create and encourage the development of mobile 
and web applications across the Twitter ecosystem, including through our Fabric platform.   

Products and Services for Users  

Twitter.  Twitter is a global platform for public self-expression and conversation in real time. By developing a 
fundamentally new way for people to create, distribute and discover content, Twitter has democratized content creation 
and distribution, enabling any voice to echo around the world instantly and unfiltered. Limiting a Tweet to 140 characters, 
with a broader canvas offered by Twitter Cards, makes it easy for anyone to quickly create, distribute and discover 
content that is consistent across our platform and optimized for mobile devices. As a result, Tweets drive a high velocity of 
information exchange that makes Twitter uniquely “live.”  

Any user on Twitter can create a Tweet and any user can follow other users. We do not impose restrictions on whom 

a user can follow, which greatly enhances the breadth and depth of available content and allows users to discover the 
content they care about most. Additionally, users can be followed by thousands or millions of other users without requiring 
a reciprocal relationship, which we refer to as an asymmetric follow model. This asymmetric follow model significantly 
enhances the ability of our users to reach a broad audience. The public nature of the Twitter platform allows us and others 
to extend the reach of Twitter content beyond our properties. Media outlets distribute Tweets beyond our properties to 
complement their content by making it more timely, relevant and comprehensive.  

Our advertisers enhance the value we create for our users. Advertisers use our Promoted Products, the majority of 

which are pay-for-performance, to promote their brands, products and services, amplify their visibility and reach, and 
complement and extend the conversation around their advertising campaigns. We enable our advertisers to target an 
audience based on a variety of factors, including a user’s Interest Graph. The Interest Graph maps, among other things, 
interests based on users followed and actions taken on our platform, such as Tweets created and engagement with 
Tweets. We believe a user’s Interest Graph produces a clear and real-time signal of a user’s interests, greatly enhancing 
the relevance of the ads we can display for users and enhancing our targeting capabilities for advertisers. Our Promoted 
Products are incorporated into our platform as native advertising and are designed to be as compelling and useful to our 
users as organic content on our platform.  

Our platform partners also add value to our user experience by contributing content to our platform, broadly 

distributing content from our platform across their properties and using Twitter content and tools to enhance their websites 
and applications. Many of the world’s most trusted media outlets, including the BBC, CNN and Times of India, regularly 
use Twitter as a platform for content distribution.  In 2015, we began to generate revenue directly from a few platform 
partners, and also benefit from network effects where more activity on Twitter results in the creation and distribution of 
more content, which attracts more users, platform partners and advertisers. 

5 

 
Vine and Video. Vine is a mobile application that enables users to create and distribute short looping videos of up to 

six seconds in length. Vine users create and distribute their videos to their followers on Vine, with the option of tweeting 
them to their Twitter followers and sharing them on other social networks. Users on Vine can follow other users, re-
broadcast content to their followers by re-vining, comment on videos and embed videos on websites. We do not currently 
monetize videos on Vine. Recently, we began to offer users on Twitter the ability to capture, edit and share videos up to 
30 seconds in length directly within the Twitter app. 

Products and Services for Advertisers  

Our Promoted Products enable our advertisers to promote their brands, products and services, amplify their visibility 
and reach, and extend the conversation around their advertising message. Currently, our Promoted Products (all of which 
are labeled “promoted” within Twitter) consist of:  

• 

• 

• 

Promoted Tweets. Promoted Tweets appear within a user’s timeline or search results just like an ordinary 
Tweet regardless of device. Using our proprietary algorithm and understanding of each user’s Interest Graph, 
we can deliver Promoted Tweets that are intended to be relevant to a particular user.  

Promoted Accounts. Promoted Accounts appear in the same format and place as accounts suggested by our 
Who to Follow recommendation engine, or in some cases, in Tweets in a user’s timeline. Promoted Accounts 
provide a way for our advertisers to grow a community of users who are interested in their business, products 
or services.  

Promoted Trends. Promoted Trends appear at the top of the list of trending topics for an entire day in a 
particular country or on a global basis. When a user clicks on a Promoted Trend, search results for that trend 
are shown in a timeline and a Promoted Tweet created by our advertisers is displayed to the user at the top of 
those search results. We feature one Promoted Trend per day per geography.  

Our technology platform and information database enable us to provide targeting capabilities based on audience 

attributes like geography, interests, keyword, television conversation and devices that make it possible for advertisers to 
promote their brands, products and services, amplify their visibility and reach, and complement and extend the 
conversation around their advertising campaigns.  

Our platform also allows customers to advertise across the mobile ecosystem, both on and off Twitter properties, 
across the full user lifecycle — from acquiring new users through app installs, to engaging existing users who already 
have the advertisers’ apps on their device. MoPub, our mobile-focused advertising exchange, combines ad serving, ad 
network mediation and a real-time bidding exchange into one comprehensive monetization platform.  Advertisers can also 
set up campaigns directly on ads.twitter.com to run across the Twitter Publisher Network. 

When our customers purchase advertising services they have the ability to monitor their advertising campaigns as 

follows:  

• 

• 

• 

Campaign Management. Our campaign management capability tools allow advertisers to monitor and make 
changes to campaigns in real time as ads are delivered. This allows advertisers to actively manage their 
campaigns as they gain deeper insight into their target audience and allows them react to events and user 
reactions as they unfold.  

Real-Time Analytics. Our analytics tools give our advertisers insight into user response to their ads, which 
helps them to understand the success of campaigns as well as customer preferences in real-time.  

Advertiser API. Our APIs enable advertisers to integrate with Twitter and build websites and applications that 
integrate our campaign management and analytics tools.  

Products for Platform Partners and Developers 

We provide a set of tools, public APIs and embeddable widgets that developers can use to contribute their content to 

our platform, syndicate and distribute Twitter content across their properties and enhance their websites and applications 
with Twitter content. Websites integrating with Twitter add value to our user experience. Indeed many applications have 
been registered by developers to enable them to integrate with our platform, and leverage Twitter content to enhance and 
extend their applications in new and creative ways. The goal of our platform product development is to make it easy for 
developers to integrate seamlessly with Twitter.  

6 

 
Key elements of the Twitter platform products include the following, many of which increase the syndication of our 

content:  

• 

• 

• 

• 

Twitter Cards. Twitter Cards enable developers to attach content and functionality to Tweets, and have that 
content appear wherever a Tweet is displayed throughout web and mobile applications. Developers can link 
Twitter Cards directly to their own mobile application or website, in order to drive visits and application installs.  

Twitter Public API. The Twitter public API allows platform partners to integrate Twitter content and follower 
relationships into their applications. For example, a platform partner can connect to the Twitter public API in 
order to collect, filter and integrate real-time content from Twitter into a live television program.  

Twitter for Websites. Twitter for Websites is a set of tools that enable platform partners to integrate Twitter 
content and functionality into their websites. Sites can embed single Tweets or timelines of Tweets, or add 
Tweet buttons to their websites that make it easy for visitors to follow particular accounts or Tweet about the 
content they are viewing.  

Fabric.  Our Fabric platform offers lightweight modular software development kits that help developers build 
more stable applications, gives them the ability to generate revenue through Twitter’s mobile ad exchange, 
MoPub, and allows them to tap into Twitter’s sign-in systems for simpler identity verification. Fabric also 
provides a simple way for developers to incorporate real-time Twitter content for greater syndication. 

Products for Data Partners  

We offer subscription access to our public data feed for partners who wish to access data beyond our public API, 

which offers a limited amount of our public data for free. Our “Gnip” branded products and services offer more 
sophisticated data sets and better data enrichments to allow developers and businesses to utilize our public content to 
derive business insights and build products using the unique content that is shared on Twitter. 

Competition  

Our business is characterized by rapid technological change, frequent product innovation and continuously evolving 

user, advertiser, platform partner and developer preferences and expectations. We face significant competition in every 
aspect of our business, particularly in attracting and retaining members of these constituencies and employees, especially 
software engineers, designers, and product managers. 

We compete with the following companies: 

• 

• 

• 

Companies that offer products that enable everyone to create and share ideas and other information. These 
offerings include, for example, Facebook and Google, as well as largely regional social media and messaging 
companies that have strong positions in particular countries. 

Companies that develop applications, particularly mobile applications, that create, syndicate and distribute 
content across internet properties. 

Traditional, online, and mobile businesses that enable marketers to reach their audiences and/or develop tools 
and systems for managing and optimizing advertising campaigns. 

As we introduce new products, as our existing products evolve, or as other companies introduce new products and 

services, we may become subject to additional competition.  

We believe that we compete favorably on the factors described above. However, our industry is evolving rapidly and 

is becoming increasingly competitive. See the sections titled “Risk Factors—If we are unable to compete effectively for 
users and advertiser spend, our business and operating results could be harmed” and “Risk Factors—We depend on 
highly skilled personnel to grow and operate our business, and if we are unable to hire, retain and motivate our personnel, 
we may not be able to grow effectively.”   

7 

 
Technology, Research and Development  

Twitter is composed of a set of core, scalable and distributed services that are built from proprietary and open 
source technologies. These systems are capable of delivering billions of short messages to hundreds of millions of people 
a day in an efficient and reliable way.  

• 

• 

• 

• 

• 

• 

Twitter’s Scale. Tweets are delivered to users via the twitter.com website, through over a dozen owned and 
operated Twitter applications, and through widgets that appear on third party websites. Each time a user 
creates a Tweet, it is delivered to each follower of such user that requests a timeline. If a follower then retweets 
it, the Tweet is delivered to each of their followers who request a timeline. In addition, we deliver to users any 
Tweets that may be generated through our trends, search or #Discover functions. This process requires our 
infrastructure to collect and efficiently deliver large volumes of information daily.  

Real-time, Service Oriented Architecture. Twitter’s architecture is optimized so users perceive instantaneous 
change. The time between a Tweet being created and having it available for users to see and interact with in 
the product is measured in tenths of a second. In general, the latency between two events occurring in our 
infrastructure is measured in millisecond increments.  

Foundational Infrastructure and Data. Our customized technology replicates and balances this data across 
multiple geographically distributed databases and allows us to store, access and modify it at scale.  

Relevancy and Content Analysis. We have built systems and algorithms to organize content to enable users to 
find and discover the most relevant content, people and topics on Twitter. Our key technologies include a 
distributed, fixed-latency, high performance search system that allows us to efficiently index, retrieve and score 
users and their content in real time. We have also built a trending platform to determine trending topics on 
Twitter.  

Advertising Technology. Our advertising platform allows advertisers to reach users based on many factors, 
including their Interest Graphs. We use sophisticated algorithms to determine the likelihood of user 
engagement with specific ads. We use these algorithms to match advertiser demand with Twitter users by 
placing Promoted Tweets and Promoted Accounts into a user’s Twitter experience in a way that optimizes for 
both user experience and the value we deliver to advertisers.  

Software Development Kits. Our Fabric platform provides developers with a range of mobile development 
tools, organized into three modular software development “kits.”  Our Crashlytics Kit gives developers a crash 
reporting solution, beta distribution, and mobile app analytics.  Our Twitter Kit gives developers the ability to 
allow users to sign in with Twitter credentials or a phone number, embed Twitter content into their app and 
leverage the Twitter API.  The MoPub Kit gives developers the ability to generate advertising revenue by 
connecting their apps to a mobile ad exchange and integrate advertisements into their apps. 

Sales and Marketing  

We have a global sales force and sales support staff that is focused on attracting and retaining advertisers. Our 
sales force and sales support staff assists advertisers throughout the advertising campaign cycle, from pre-purchase 
decision making to real-time optimizations as they utilize our campaign management tools, and to post-campaign 
analytics reports to assess the effectiveness of their advertising campaigns. Our advertisers also use our self-serve 
advertising platform to launch and manage their advertising campaigns.  

Since our inception, our user base has grown primarily by word-of-mouth. Our marketing efforts to date have 
focused on amplifying and accelerating this word-of-mouth momentum. We have historically built our brand through these 
efforts and increased usage of Twitter worldwide with relatively minimal marketing costs.  However, we began to spend 
more on sales and marketing in 2014 than we had historically, and expect our sales and marketing expense to continue to 
increase in absolute dollars in 2015.  

Intellectual Property  

We seek to protect our intellectual property rights by relying on federal, state and common law rights in the United 

States and other countries, as well as contractual restrictions. We generally enter into confidentiality and invention 
assignment agreements with our employees and contractors, and confidentiality agreements with other third parties, in 
order to limit access to, and disclosure and use of, our confidential information and proprietary technology. In addition to 
these contractual arrangements, we also rely on a combination of trademarks, trade dress, domain names, copyrights, 
trade secrets and patents to help protect our brand and our other intellectual property.  

8 

 
As of December 31, 2014, we had 969 issued patents in the United States and foreign countries relating to message 
distribution, graphical user interfaces, security and related technologies. Our issued United States patents are expected to 
expire between 2016 and 2032.  

We may be unable to obtain patent or trademark protection for our technologies and brands, and our existing 

patents and trademarks, and any patents or trademarks that may be issued in the future, may not provide us with 
competitive advantages or distinguish our products and services from those of our competitors. In addition, any patents 
and trademarks may be contested, circumvented or found unenforceable or invalid, and we may not be able to prevent 
third parties from infringing, diluting or otherwise violating them.  

In May 2013, we implemented our Innovator’s Patent Agreement, or IPA, which we enter into with our employees 

and consultants, including our founders. We implemented the IPA because we were concerned about the recent 
proliferation of offensive patent lawsuits, including lawsuits by “non-practicing entities.” We are also encouraging other 
companies to implement the IPA in an effort to reduce the number of patents with offensive rights which may be 
transferred to third parties, including non-practicing entities. We believe that a reduction in the number of patents with 
transferrable offensive rights may reduce the number of offensive lawsuits that may be filed, particularly by non-practicing 
entities.  

The IPA limits our ability to prevent infringement of our patents.  See the section titled “Risk Factors—Our intellectual 
property rights are valuable, and any inability to protect them could reduce the value of our products, services and brand” 
for a further discussion of the IPA.  

Companies in the Internet, technology and media industries own large numbers of patents, copyrights, trademarks and 
trade secrets, and frequently enter into litigation based on allegations of infringement, misappropriation, or other violations of 
intellectual property or other rights. In addition, various “non-practicing entities” that own patents and other intellectual 
property rights often attempt to aggressively assert their rights in order to extract value from technology companies. We are 
presently involved in a number of intellectual property lawsuits, and from time to time we face, and we expect to face in the 
future, allegations that we have infringed or otherwise violated the patents, copyrights, trademarks, trade secrets, and other 
intellectual property rights of third parties, including our competitors and non-practicing entities. As we face increasing 
competition and as our business grows, we will likely face more intellectual property-related claims and litigation matters. For 
additional information, see the sections titled “Risk Factors—We are currently, and expect to be in the future, party to 
intellectual property rights claims that are expensive and time consuming to defend, and, if resolved adversely, could have a 
significant impact on our business, financial condition or operating results” and “Legal Proceedings.”   

Government Regulation  

We are subject to a number of U.S. federal and state and foreign laws and regulations that involve matters central to 

our business. These laws and regulations may involve privacy, rights of publicity, data protection, content regulation, 
intellectual property, competition, protection of minors, consumer protection, taxation or other subjects. Many of these 
laws and regulations are still evolving and being tested in courts and could be interpreted in ways that could harm our 
business. In addition, the application and interpretation of these laws and regulations often are uncertain, particularly in 
the new and rapidly evolving industry in which we operate.  

We are also subject to federal, state and foreign laws regarding privacy and the protection of user data. Foreign data 
protection, privacy, consumer protection, content regulation and other laws and regulations are often more restrictive than 
those in the United States. There are also a number of legislative proposals pending before the U.S. Congress, various 
state legislative bodies and foreign governments concerning data protection that could affect us. For example, regulation 
relating to the 1995 European Union Data Protection Directive is currently being considered by European legislative 
bodies that may include more stringent operational requirements for entities processing personal information and 
significant penalties for non-compliance.  

9 

 
In March 2011, to resolve an investigation into various incidents, we entered into a settlement agreement with the 
Federal Trade Commission, or FTC, that, among other things, requires us to establish an information security program 
designed to protect non-public consumer information and also requires that we obtain biennial independent security 
assessments. The FTC investigation was the result of two separate incidents in which unauthorized intruders obtained 
administrative passwords of certain Twitter employees. In one of the incidents, the intruder accessed the employee’s 
administrative capabilities to fraudulently reset various user passwords and post unauthorized Tweets. The obligations 
under the settlement agreement remain in effect until the later of March 2, 2031, or the date 20 years after the date, if any, 
on which the U.S. government or the FTC files a complaint in federal court alleging any violation of the order. Violation of 
existing or future regulatory orders, settlements, or consent decrees could subject us to substantial monetary fines and 
other penalties that could negatively affect our financial condition and results of operations.  

Twitter users may be restricted from accessing Twitter from certain countries, and other countries have intermittently 

restricted access to Twitter. For example, Twitter is not directly accessible in China and has been blocked in the past in 
Turkey. It is possible that other governments may seek to restrict access to or our block our website or mobile 
applications, censor content available through our products or impose other restrictions that may affect the accessibility or 
usability of Twitter for an extended period of time or indefinitely.  For instance, some countries have enacted laws that 
allow websites to be blocked for hosting certain types of content. 

For additional information, see the section titled “Risk Factors—Our business is subject to complex and evolving 
U.S. and foreign laws and regulations. These laws and regulations are subject to change and uncertain interpretation, and 
could result in claims, changes to our business practices, monetary penalties, increased cost of operations or declines in 
user growth, user engagement or ad engagement, or otherwise harm our business.”  

Information about Segment and Geographic Revenue 

Information about segment and geographic revenue is set forth in Note 17 of the Notes to Consolidated Financial 

Statements under Item 8 of this Annual Report on Form 10-K. 

Employees  

As of December 31, 2014, we had 3,638 full-time employees.  

Corporate Information  

We were incorporated in Delaware in April 2007. Our principal executive offices are located at 1355 Market Street, 

Suite 900, San Francisco, California 94103, and our telephone number is (415) 222-9670. We completed our initial public 
offering in November 2013 and our common stock is listed on the New York Stock Exchange under the symbol “TWTR.” 
Unless the context requires otherwise, the words “Twitter,” “we,” “Company,” “us” and “our” refer to Twitter, Inc. and our 
wholly owned subsidiaries. 

Available Information 

Our website is located at www.twitter.com, and our investor relations website is located at 

http://investor.twitterinc.com/. Copies of our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current 
Reports on Form 8-K, and amendments to these reports filed or furnished pursuant to Section 13(a) or 15(d) of the 
Securities Exchange Act of 1934, as amended, or the Exchange Act, are available, free of charge, on our investor 
relations website as soon as reasonably practicable after we file such material electronically with or furnish it to the 
Securities and Exchange Commission, or the SEC. The SEC also maintains a website that contains our SEC filings. The 
address of the site is www.sec.gov. Further, a copy of this Annual Report on Form 10-K is located at the SEC’s Public 
Reference Room at 100 F Street, NE, Washington, D.C. 20549. Information on the operation of the Public Reference 
Room can be obtained by calling the SEC at 1-800-SEC-0330. 

10 

 
We webcast our earnings calls and certain events we participate in or host with members of the investment 
community on our investor relations website. Additionally, we provide notifications of news or announcements regarding 
our financial performance, including SEC filings, investor events, press and earnings releases, and blogs as part of our 
investor relations website. Twitter has used, and intends to continue to use, our investor relations website, as well as 
certain Twitter accounts (@dickc, @twitter and @twitterIR), as means of disclosing material non-public information and for 
complying with its disclosure obligations under Regulation FD. Further corporate governance information, including our 
certificate of incorporation, bylaws, governance guidelines, board committee charters, and code of business conduct and 
ethics, is also available on our investor relations website under the heading “Corporate governance.” The contents of our 
websites are not intended to be incorporated by reference into this Annual Report on Form 10-K or in any other report or 
document we file with the SEC, and any references to our websites are intended to be inactive textual references only. 

Item 1A. RISK FACTORS  

Investing in our common stock involves a high degree of risk. You should carefully consider the risks and 

uncertainties described below, together with all of the other information in this Annual Report on Form 10-K, including the 
section titled “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and our 
consolidated financial statements and related notes, before making a decision to invest in our common stock. The risks 
and uncertainties described below may not be the only ones we face. If any of the risks actually occur, our business, 
financial condition, operating results, cash flows and prospects could be materially and adversely affected. In that event, 
the market price of our common stock could decline, and you could lose part or all of your investment.  

Risks Related to Our Business and Our Industry  

If we fail to grow our user base, or if user engagement or ad engagement on our platform decline, our revenue, 
business and operating results may be harmed.  

The size of our user base and our users’ level of engagement are critical to our success. We had 288 million 
average MAUs in the three months ended December 31, 2014, representing a 20% increase from 241 million average 
MAUs in the three months ended December 31, 2013. Our financial performance has been and will continue to be 
significantly determined by our success in growing the number of users and increasing their overall level of engagement 
on our platform as well as the number of ad engagements. We anticipate that our user growth rate will slow over time as 
the size of our user base increases. For example, in general, a higher proportion of Internet users in the United States 
uses Twitter than Internet users in other countries and, in the future, we expect our user growth rate in certain 
international markets, such as Argentina, Brazil, France, Germany, India and Japan, to continue to be higher than our 
user growth rate in the United States. To the extent our user growth rate slows, our success will become increasingly 
dependent on our ability to increase levels of ad engagement on Twitter. We generate a substantial majority of our 
revenue based upon engagement by our users with the ads that we display. If people do not perceive our products and 
services to be useful, reliable and trustworthy, we may not be able to attract users or increase the frequency of their 
engagement with our platform and the ads that we display. A number of consumer-oriented websites that achieved early 
popularity have since seen their user bases or levels of engagement decline, in some cases precipitously. There is no 
guarantee that we will not experience a similar erosion of our user base or engagement levels. A number of factors could 
potentially negatively affect user growth and engagement, including if:  

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users engage with other products, services or activities as an alternative to ours;  

influential users, such as world leaders, government officials, celebrities, athletes, journalists, sports teams, 
media outlets and brands or certain age demographics conclude that an alternative product or service is more 
relevant;  

we are unable to convince potential new users of the value and usefulness of our products and services;  

there is a decrease in the perceived quality of the content generated by our users;  

we fail to introduce new and improved products or services or if we introduce new or improved products or 
services that are not favorably received or that negatively affect user engagement;  

technical or other problems prevent us from delivering our products or services in a rapid and reliable manner 
or otherwise affect the user experience, including issues with connecting to the Internet;  

users have difficulty installing, updating, or otherwise accessing our products or services on mobile devices as 
a result of actions by us or third parties that we rely on to distribute our products and deliver our services; 

we are unable to present users with content that is interesting, useful and relevant to them;  

11 

 
• 

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users believe that their experience is diminished as a result of the decisions we make with respect to the 
frequency, relevance and prominence of ads that we display;  

there are user concerns related to privacy and communication, safety, security or other factors;  

we are unable to combat spam or other hostile or inappropriate usage on our platform;  

there are adverse changes in our products or services that are mandated by, or that we elect to make to 
address, legislation, regulatory authorities or litigation, including settlements or consent decrees;  

we fail to provide adequate customer service to users; or  

we do not maintain our brand image or our reputation is damaged.  

If we are unable to increase our user base, user growth rate or user engagement, or if these metrics decline, our 

products and services could be less attractive to potential new users, as well as to advertisers and platform partners, 
which would have a material and adverse impact on our business, financial condition and operating results.  

If our users do not continue to contribute content or their contributions are not valuable to other users, we may 
experience a decline in the number of users accessing our products and services and user engagement, which 
could result in the loss of advertisers, platform partners and revenue.  

Our success depends on our ability to provide users of our products and services with valuable content, which in 

turn depends on the content contributed by our users. We believe that one of our competitive advantages is the quality, 
quantity and real-time nature of the content on Twitter, and that access to unique or real-time content is one of the main 
reasons users visit Twitter. Our ability to expand into new international markets depends on the availability of relevant 
local content in those markets. We seek to foster a broad and engaged user community, and we encourage world leaders, 
government officials, celebrities, athletes, journalists, sports teams, media outlets and brands to use our products and 
services to express their views to broad audiences. We also encourage media outlets to use our products and services to 
distribute their content. If users, including influential users, do not continue to contribute content to Twitter, and we are 
unable to provide users with valuable and timely content, our user base and user engagement may decline. Additionally, if 
we are not able to address user concerns regarding the safety and security of our products and services or if we are 
unable to successfully prevent abusive or other hostile behavior on our platform, the size of our user base and user 
engagement may decline. We rely on the sale of advertising services for the substantial majority of our revenue. If we 
experience a decline in the number of users, user growth rate, or user engagement, including as a result of the loss of 
world leaders, government officials, celebrities, athletes, journalists, sports teams, media outlets and brands who generate 
content on Twitter, advertisers may not view our products and services as attractive for their marketing expenditures, and 
may reduce their spending with us which would harm our business and operating results.  

We generate the substantial majority of our revenue from advertising. The loss of advertising revenue could 
harm our business.  

The substantial majority of our revenue is currently generated from third parties advertising on Twitter. We 

generated 89% and 90% of our revenue from advertising in the fiscal years ended December 31, 2013 and 2014, 
respectively. We generate substantially all of our advertising revenue through the sale of our three Promoted Products: 
Promoted Tweets, Promoted Accounts and Promoted Trends. As is common in our industry, our advertisers do not have 
long-term advertising commitments with us. In addition, many of our advertisers purchase our advertising services through 
one of several large advertising agency holding companies. Advertising agencies and potential new advertisers may view 
our Promoted Products as experimental and unproven, and we may need to devote additional time and resources to 
educate them about our products and services. Advertisers also may choose to reach users through our free products and 
services, instead of our Promoted Products. Advertisers will not continue to do business with us, or they will reduce the 
prices they are willing to pay to advertise with us, if we do not deliver ads in an effective manner, or if they do not believe 
that their investment in advertising with us will generate a competitive return relative to alternatives, including online, 
mobile and traditional advertising platforms. Our advertising revenue could be adversely affected by a number of other 
factors, including:  

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decreases in user engagement with Twitter and with the ads on our platform;  

decreases in the size of our user base or user growth rate; 

if we are unable to demonstrate the value of our Promoted Products to advertisers and advertising agencies or 
if we are unable to measure the value of our Promoted Products in a manner which advertisers and advertising 
agencies find useful;  

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if our Promoted Products are not cost effective or valuable for certain types of advertisers or if we are unable to 
develop cost effective or valuable advertising services for different types of advertisers;  

if we are unable to convince advertisers and brands to invest resources in learning to use our products and 
services and maintaining a brand presence on Twitter;  

our advertisers’ ability to optimize their campaigns or measure the results of their campaigns; 

product or service changes we may make that change the frequency or relative prominence of ads displayed 
on Twitter or that detrimentally impact revenue in the near term with the goal of achieving long term benefits;  

our inability to increase advertiser demand and inventory;  

our inability to increase the relevance of ads shown to users;  

our inability to help advertisers effectively target ads, including as a result of the fact that we do not collect 
extensive personal information from our users and that we do not have real-time geographic information for all 
of our users particularly for ads served through our in-app mobile ad exchange;  

decreases in the cost per ad engagement;  

failure to effectively monetize our growing international user base, our logged-out audience or our syndicated 
audience; 

loss of advertising market share to our competitors;  

the degree to which users access Twitter content through applications that do not contain our ads;  

any arrangements or other partnerships with third parties to share our revenue;  

our new advertising strategies, such as television targeting and real-time video clips embedded in Tweets, do 
not gain traction;  

the impact of new technologies that could block or obscure the display of our ads;  

adverse legal developments relating to advertising or measurement tools related to the effectiveness of 
advertising, including legislative and regulatory developments, and developments in litigation;  

adverse media reports or other negative publicity involving us or other companies in our industry;  

our inability to create new products and services that sustain or increase the value of our advertising services 
to both our advertisers and our users;  

the impact of fraudulent clicks or spam on our Promoted Products and our users;  

changes in the way our advertising is priced; and  

the impact of macroeconomic conditions and conditions in the advertising industry in general.  

The occurrence of any of these or other factors could result in a reduction in demand for our ads, which may reduce 

the prices we receive for our ads, either of which would negatively affect our revenue and operating results.  

If we are unable to compete effectively for users and advertiser spend, our business and operating results could 
be harmed.  

Competition for users of our products and services is intense. Although we have developed a new global platform for 

public self-expression and conversation in real time, we face strong competition in our business. We compete against 
many companies to attract and engage users, including companies which have greater financial resources and 
substantially larger user bases, such as Facebook (including Instagram), Google, LinkedIn, Microsoft and Yahoo, which 
offer a variety of Internet and mobile device-based products, services and content. For example, Facebook operates a 
social networking site with significantly more users than Twitter and has been introducing features similar to those of 
Twitter. In addition, Google may use its strong position in one or more markets to gain a competitive advantage over us in 
areas in which we operate, including by integrating competing features into products or services they control. As a result, 
our competitors may draw users towards their products or services and away from ours. This could decrease the growth 
or engagement of our user base, which, in turn, would negatively affect our business. We also compete against smaller 
companies, such as Sina Weibo, LINE and Kakao, each of which is based in Asia.  

13 

 
We believe that our ability to compete effectively for users depends upon many factors both within and beyond our 

control, including:  

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the popularity, usefulness, ease of use, performance and reliability of our products and services compared to 
those of our competitors;  

the amount, quality and timeliness of content generated by our users;  

the timing and market acceptance of our products and services;  

the continued adoption of our products and services internationally;  

our ability, and the ability of our competitors, to develop new products and services and enhancements to 
existing products and services;  

the frequency and relative prominence of the ads displayed by us or our competitors;  

our ability to establish and maintain relationships with platform partners that integrate with our platform;  

changes mandated by, or that we elect to make to address, legislation, regulatory authorities or litigation, 
including settlements and consent decrees, some of which may have a disproportionate effect on us;  

the application of antitrust laws both in the United States and internationally;  

government action regulating competition;  

our ability to attract, retain and motivate talented employees, particularly engineers, designers and product 
managers;  

acquisitions or consolidation within our industry, which may result in more formidable competitors; and  

our reputation and the brand strength relative to our competitors.  

We also face significant competition for advertiser spend. The substantial majority of our revenue is currently 

generated through ads on Twitter, and we compete against online and mobile businesses, including those referenced 
above, and traditional media outlets, such as television, radio and print, for advertising budgets.  We also compete with 
advertising networks, exchanges, demand side platforms and other platforms, such as Google AdSense, DoubleClick Ad 
Exchange, Yahoo Ad Exchange, AOL’s Ad.com and Microsoft Media Network, for marketing budgets and in the 
development of the tools and systems for managing and optimizing advertising campaigns. In order to grow our revenue 
and improve our operating results, we must increase our share of spending on advertising relative to our competitors, 
many of which are larger companies that offer more traditional and widely accepted advertising products. In addition, 
some of our larger competitors have substantially broader product or service offerings and leverage their relationships 
based on other products or services to gain additional share of advertising budgets.  

We believe that our ability to compete effectively for advertiser spend depends upon many factors both within and 

beyond our control, including:  

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the size and composition of our user base relative to those of our competitors;  

our ad targeting capabilities, and those of our competitors;  

the timing and market acceptance of our advertising services, and those of our competitors;  

our marketing and selling efforts, and those of our competitors;  

the pricing for our Promoted Products relative to the advertising products and services of our competitors;  

the return our advertisers receive from our advertising services, and those of our competitors; and  

our reputation and the strength of our brand relative to our competitors.  

14 

 
In recent years, there have been significant acquisitions and consolidation by and among our actual and potential 

competitors. We anticipate this trend of consolidation will continue, which will present heightened competitive challenges 
for our business. Acquisitions by our competitors may result in reduced functionality of our products and services. For 
example, following Facebook’s acquisition of Instagram, Facebook disabled Instagram’s photo integration with Twitter 
such that Instagram photos are no longer viewable within Tweets and users are now re-directed to Instagram to view 
Instagram photos through a link within a Tweet. As a result, our users may be less likely to click on links to Instagram 
photos in Tweets, and Instagram users may be less likely to tweet or remain active users of Twitter. Any similar 
elimination of integration with Twitter in the future, whether by Facebook or others, may adversely impact our business 
and operating results.  

Consolidation may also enable our larger competitors to offer bundled or integrated products that feature 

alternatives to our platform. Reduced functionality of our products and services, or our competitors’ ability to offer bundled 
or integrated products that compete directly with us, may cause our user growth, user engagement and ad engagement to 
decline and advertisers to reduce their spend with us.  

If we are not able to compete effectively for users and advertiser spend our business and operating results would be 

materially and adversely affected.  

Our operating results may fluctuate from quarter to quarter, which makes them difficult to predict.  

Our quarterly operating results have fluctuated in the past and will fluctuate in the future. As a result, our past 
quarterly operating results are not necessarily indicators of future performance. Our operating results in any given quarter 
can be influenced by numerous factors, many of which we are unable to predict or are outside of our control, including:  

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our ability to grow our user base and user engagement;  

our ability to attract and retain advertisers and platform partners; 

the occurrence of planned significant events, such as the World Cup, Super Bowl, Champions League Final, 
World Series, Olympics and the Oscars, or unplanned significant events, such as natural disasters and political 
revolutions;  

fluctuations in spending by our advertisers, including as a result of seasonality and extraordinary news events, 
or other factors;  

changes in the mix of geographic location of our users and advertisers; 

the number of ad engagements by users;  

the pricing of our ads and other products and services;  

the development and introduction of new products or services or changes in features of existing products or 
services;  

the impact of competitors or competitive products and services;  

our ability to maintain or increase revenue;  

our ability to maintain or improve gross margins and operating margins;  

increases in research and development, marketing and sales and other operating expenses that we may incur 
to grow and expand our operations and to remain competitive;  

stock-based compensation expense;  

costs related to the acquisition of businesses, talent, technologies or intellectual property, including potentially 
significant amortization costs;  

system failures resulting in the inaccessibility of our products and services;  

breaches of security or privacy, and the costs associated with remediating any such breaches;  

adverse litigation judgments, settlements or other litigation-related costs, and the fees associated with 
investigating and defending claims;  

changes in the legislative or regulatory environment, including with respect to security, privacy or enforcement 
by government regulators, including fines, orders or consent decrees;  

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fluctuations in currency exchange rates and changes in the proportion of our revenue and expenses 
denominated in foreign currencies;  

changes in U.S. generally accepted accounting principles; and  

changes in global business or macroeconomic conditions.  

Given our limited operating history and the rapidly evolving markets in which we compete, our historical operating 

results may not be useful to you in predicting our future operating results. We believe our rapid growth may understate the 
potential seasonality of our business. As our revenue growth rate slows, we expect that the seasonality in our business 
may become more pronounced and may in the future cause our operating results to fluctuate. For example, advertising 
spending is traditionally seasonally strong in the fourth quarter of each year and we believe that this seasonality affects 
our quarterly results, which generally reflect higher sequential advertising revenue growth from the third to fourth quarter 
compared to sequential advertising revenue growth from the fourth quarter to the subsequent first quarter. In addition, 
global economic concerns continue to create uncertainty and unpredictability and add risk to our future outlook. An 
economic downturn in any particular region in which we do business or globally could result in reductions in advertising 
revenue, as our advertisers reduce their advertising budgets, and other adverse effects that could harm our operating 
results.  

User growth and engagement depend upon effective interoperation with operating systems, networks, devices, 
web browsers and standards that we do not control.  

We make our products and services available across a variety of operating systems and through websites. We are 

dependent on the interoperability of our products and services with popular devices, desktop and mobile operating 
systems and web browsers that we do not control, such as Mac OS, Windows, Android, iOS, Chrome and Firefox. Any 
changes in such systems, devices or web browsers that degrade the functionality of our products and services, make it 
difficult for our users to access our content, limit our ability to target or measure the effectiveness of ads, impose fees 
related to our products or services or give preferential treatment to competitive products or services could adversely affect 
usage of our products and services. Further, if the number of platforms for which we develop our product expands, it will 
result in an increase in our operating expenses. In order to deliver high quality products and services, it is important that 
our products and services work well with a range of operating systems, networks, devices, web browsers and standards 
that we do not control. In addition, because a majority of our users access our products and services through mobile 
devices, we are particularly dependent on the interoperability of our products and services with mobile devices and 
operating systems. We may not be successful in developing relationships with key participants in the mobile industry or in 
developing products or services that operate effectively with these operating systems, networks, devices, web browsers 
and standards. In the event that it is difficult for our users to access and use our products and services, particularly on 
their mobile devices, our user growth and engagement could be harmed, and our business and operating results could be 
adversely affected.  

16 

 
If we fail to expand effectively in international markets, our revenue and our business will be harmed.  

We may not be able to monetize our products and services internationally as effectively as in the United States as a 
result of competition, advertiser demand, differences in the digital advertising market and digital advertising conventions, 
as well as differences in the way that users in different countries access or utilize our products and services. For example, 
most users in emerging markets like India and Pakistan use feature phones and communicate via SMS messaging, both 
of which have limited functionality and neither of which may be able to take full advantage of our products and services 
offered on smartphone or our website or desktop applications.  Differences in the competitive landscape in international 
markets may impact our ability to monetize our products and services. For example, in South Korea we face intense 
competition from a messaging service offered by Kakao, which offers some of the same communication features as 
Twitter. The existence of a well-established competitor in an international market may adversely affect our ability to 
increase our user base, attract platform partners and advertisers and monetize our products in such market. We may also 
experience differences in advertiser demand in international markets. For example, during times of political upheaval, 
advertisers may choose not to advertise on Twitter. Certain international markets are also not as familiar with digital 
advertising in general, or in new forms of digital advertising such as our Promoted Products. Further, we face challenges 
in providing certain advertising products, features or analytics in certain international markets, such as the European 
Union, due to government regulation. Our products and services may also be used differently abroad than in the United 
States. In particular, in certain international markets where Internet access is not as rapid or reliable as in the United 
States, users tend not to take advantage of certain features of our products and services, such as rich media included in 
Tweets. The limitation of mobile devices of users in emerging and other markets limits our ability to deliver certain 
features to those users and may limit the ability of advertisers to deliver compelling advertisements to users in these 
markets which may result in reduced ad engagements which would adversely affect our business and operating results.  

If our revenue from our international operations, and particularly from our operations in the countries and regions on 
which we have focused our spending, does not exceed the expense of establishing and maintaining these operations, our 
business and operating results will suffer. In addition, our user base may expand more rapidly in international regions 
where we are less successful in monetizing our products and services. As our user base continues to expand 
internationally, we will need to increase revenue from the activity generated by our international users in order to grow our 
business. For example, users outside the United States constituted 78% of our average MAUs in the three months ended 
December 31, 2014, but our international revenue, as determined based on the billing location of our advertisers, was 
only 34% of our consolidated revenue in the three months ended December 31, 2014. Our inability to successfully expand 
internationally could adversely affect our business, financial condition and operating results.  

We have a limited operating history in a new and unproven market for our platform, which makes it difficult to 
evaluate our future prospects and may increase the risk that we will not be successful.  

We have developed a global platform for public self-expression and conversation in real time, and the market for our 
products and services is relatively new and may not develop as expected, if at all. Despite our efforts to reduce barriers to 
consumption, people who are not our users may not understand the value of our products and services and new users 
may initially find our product confusing. There may be a perception that our products and services are only useful to users 
who tweet, or to influential users with large audiences. Convincing potential new users of the value of our products and 
services is critical to increasing our user base and to the success of our business.  

We have a limited operating history, as we only began to generate revenue in 2009 and we started to sell our 
Promoted Products in 2010, which makes it difficult to effectively assess our future prospects or forecast our future 
results. You should consider our business and prospects in light of the risks and challenges we encounter or may 
encounter in this developing and rapidly evolving market. These risks and challenges include our ability to, among other 
things:  

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increase our number of users and user engagement;  

successfully expand our business, especially internationally;  

develop a reliable, scalable, secure, high-performance technology infrastructure that can efficiently handle 
increased usage globally;  

convince advertisers of the benefits of our Promoted Products compared to alternative forms of advertising;  

develop and deploy new features, products and services;  

successfully compete with other companies, some of which have substantially greater resources and market 
power than us, that are currently in, or may in the future enter, our industry, or duplicate the features of our 
products and services;  

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attract, retain and motivate talented employees, particularly engineers, designers and product managers;  

process, store, protect and use personal data in compliance with governmental regulations, contractual 
obligations and other obligations related to privacy and security;  

continue to earn and preserve our users’ trust, including with respect to their private personal information; and  

defend ourselves against litigation, regulatory, intellectual property, privacy or other claims.  

If we fail to educate potential users and potential advertisers about the value of our products and services, if the 

market for our platform does not develop as we expect or if we fail to address the needs of this market, our business will 
be harmed. We may not be able to successfully address these risks and challenges or others. Failure to adequately 
address these risks and challenges could harm our business and cause our operating results to suffer.  

We have incurred significant operating losses in the past, and we may not be able to achieve or subsequently 
maintain profitability.  

Since our inception, we have incurred significant operating losses, and, as of December 31, 2014, we had an 

accumulated deficit of $1.57 billion. Although our revenue has grown rapidly, increasing from $28.3 million in 2010 to 
$1.40 billion in 2014, we expect that our revenue growth rate will slow in the future as a result of a variety of factors, 
including the gradual decline in the growth rate of our user base. We believe that our future revenue growth will depend 
on, among other factors, our ability to attract new users, increase user engagement and ad engagement, increase our 
brand awareness, compete effectively, maximize our sales efforts, demonstrate a positive return on investment for 
advertisers, successfully develop new products and services and expand internationally. Accordingly, you should not rely 
on the revenue growth of any prior quarterly or annual period as an indication of our future performance. We also expect 
our costs to increase in future periods as we continue to expend substantial financial resources on:  

• 

• 

• 

• 

• 

• 

• 

our technology infrastructure;  

research and development for our products and services;  

sales and marketing;  

domestic and international expansion efforts, including the real estate and facilities costs associated with such 
expansions;  

attracting and retaining talented employees;  

strategic opportunities, including commercial relationships and acquisitions; and  

general administration, including personnel costs and legal and accounting expenses related to being a public 
company.  

These investments may not result in increased revenue or growth in our business. If we are unable to generate 
adequate revenue growth and to manage our expenses, we may continue to incur significant losses in the future and may 
not be able to achieve or maintain profitability.  

Servicing the Notes may require a significant amount of cash, and we may not have sufficient cash flow or the 
ability to raise the funds necessary to satisfy our obligations under the Notes, and our future debt may contain 
limitations on our ability to pay cash upon conversion or repurchase of the Notes. 

In 2014, we issued $935.0 million principal amount of 0.25% convertible senior notes due 2019, or the 2019 Notes, 
and $954.0 million principal amount of 1.00% convertible senior notes due 2021, or the 2021 Notes and together with the 
2019 Notes, the Notes, in private placements to qualified institutional buyers.  As of December 31, 2014, we had a total 
par value of $1.89 billion of outstanding Notes.  

Holders of the Notes will have the right under the indenture for the Notes to require us to repurchase all or a portion 

of their notes upon the occurrence of a fundamental change before the relevant maturity date, in each case at a 
repurchase price equal to 100% of the principal amount of the Notes, plus accrued and unpaid interest, if any, to the 
fundamental change repurchase date.  In addition, upon conversion of the Notes, unless we elect to deliver solely shares 
of our common stock to settle such conversion (other than paying cash in lieu of delivering any fractional shares), we will 
be required to make cash payments in respect of the Notes being converted. Moreover, we will be required to repay the 
notes in cash at their maturity, unless earlier converted or repurchased.  

18 

 
Our ability to refinance the Notes, make cash payments in connection with conversions of the Notes or repurchase 

the Notes in the event of a fundamental change will depend on market conditions and our future performance, which is 
subject to economic, financial, competitive and other factors beyond our control. We also may not use the cash we have 
raised through the issuance of the Notes in an optimally productive and profitable manner. However, since inception we 
have incurred significant operating losses and we historically have not been cash flow positive and may not be in the 
future.  As a result, we may not have enough available cash or be able to obtain financing on commercially reasonable 
terms or at all, at the time we are required to make repurchases of notes surrendered therefor or pay cash with respect to 
notes being converted or at their maturity and our level of indebtedness could adversely affect our future operations by 
increasing our vulnerability to adverse changes in general economic and industry conditions and by limiting or prohibiting 
our ability to obtain additional financing for future capital expenditures, acquisitions and general corporate and other 
purposes. In addition, if we are unable to make cash payments upon conversion of the Notes we would be required to 
issue significant amounts of our common stock, which would be dilutive to existing stockholders. If we do not have 
sufficient cash to repurchase the Notes following a fundamental change, we would be in default under the terms of the 
Notes, which could seriously harm our business. In addition, the terms of the Notes do not limit the amount of future 
indebtedness we may incur. If we incur significantly more debt, this could intensify the risks described above. 

Our business depends on continued and unimpeded access to our products and services on the Internet by our 
users, platform partners and advertisers. If we or our users experience disruptions in Internet service or if 
Internet service providers are able to block, degrade or charge for access to our products and services, we could 
incur additional expenses and the loss of users and advertisers.  

We depend on the ability of our users, platform partners and advertisers to access the Internet. 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, government-owned 
service providers, device manufacturers and operating system providers, any of whom could take actions that degrade, 
disrupt or increase the cost of user access to our products or services, which would, in turn, negatively impact our 
business. For example, access to Twitter is blocked in China and was blocked in Turkey for a few weeks in the first 
quarter of 2014. The adoption of any laws or regulations that adversely affect the growth, popularity or use of the Internet, 
including laws or practices limiting Internet neutrality, could decrease the demand for, or the usage of, our products and 
services, increase our cost of doing business and adversely affect our operating results. We also rely on other companies 
to maintain reliable network systems that provide adequate speed, data capacity and security to us and our users. As the 
Internet continues to experience growth in the number of users, frequency of use and amount of data transmitted, the 
Internet infrastructure that we and our users rely on may be unable to support the demands placed upon it. The failure of 
the Internet infrastructure that we or our users rely on, even for a short period of time, could undermine our operations and 
harm our operating results.  

Our new products, services and initiatives and changes to existing products, services and initiatives could fail to 
attract users, platform partners and advertisers or generate revenue.  

Our ability to increase the size and engagement of our user base, attract advertisers and platform partners and 
generate revenue will depend in part on our ability to improve existing products and services and create successful new 
products and services, both independently and in conjunction with third parties. We may introduce significant changes to 
our existing products and services or develop and introduce new and unproven products and services, including 
technologies with which we have little or no prior development or operating experience. For example, in 2013, we 
introduced Vine, a mobile application that enables users to create and distribute videos that are up to six seconds in 
length, and #Music, a mobile application that helped users discover new music and artists based on Twitter data profiles 
which we disconnected in 2014. If new or enhanced products or services fail to engage users, platform partners and 
advertisers, we may fail to attract or retain users or to generate sufficient revenue or operating profit to justify our 
investments, and our business and operating results could be adversely affected. In addition, we have launched and 
expect to continue to launch strategic initiatives, such as the Nielsen Twitter TV Rating, that do not directly generate 
revenue but which we believe will enhance our attractiveness to users, platform partners and advertisers. In the future, we 
may invest in new products, services and initiatives to generate revenue, but there is no guarantee these approaches will 
be successful. We may not be successful in future efforts to generate revenue from our new products or services. If our 
strategic initiatives do not enhance our ability to monetize our existing products and services or enable us to develop new 
approaches to monetization, we may not be able to maintain or grow our revenue or recover any associated development 
costs and our operating results could be adversely affected.  

19 

 
Spam could diminish the user experience on our platform, which could damage our reputation and deter our 
current and potential users from using our products and services.  

“Spam” on Twitter refers to a range of abusive activities that are prohibited by our terms of service and is generally 

defined as unsolicited, repeated actions that negatively impact other users with the general goal of drawing user attention 
to a given account, site, product or idea. This includes posting large numbers of unsolicited mentions of a user, duplicate 
Tweets, misleading links (e.g., to malware or “click-jacking” pages) or other false or misleading content, and aggressively 
following and un-following accounts, adding users to lists, sending invitations, retweeting and favoriting Tweets to 
inappropriately attract attention. Our terms of service also prohibit the creation of serial or bulk accounts, both manually or 
using automation, for disruptive or abusive purposes, such as to tweet spam or to artificially inflate the popularity of users 
seeking to promote themselves on Twitter. Although we continue to invest resources to reduce spam on Twitter, we 
expect spammers will continue to seek ways to act inappropriately on our platform. In addition, we expect that increases 
in the number of users on our platform will result in increased efforts by spammers to misuse our platform. We 
continuously combat spam, including by suspending or terminating accounts we believe to be spammers and launching 
algorithmic changes focused on curbing abusive activities. Our actions to combat spam require the diversion of significant 
time and focus of our engineering team from improving our products and services. If spam increases on Twitter, this could 
hurt our reputation for delivering relevant content or reduce user growth and user engagement and result in continuing 
operational cost to us.  

If we fail to effectively manage our growth, our business and operating results could be harmed.  

We continue to experience rapid growth in our headcount and operations, which will continue to place significant 

demands on our management, operational and financial infrastructure. As of December 31, 2014, we had 3,638 full-time 
employees, an increase of approximately 3,500 full-time employees since January 1, 2010. We intend to continue to make 
substantial investments to expand our operations, research and development, sales and marketing and general and 
administrative organizations, as well as our international operations. We face significant competition for employees, 
particularly engineers, designers and product managers, from other Internet and high-growth companies, which include 
both publicly-traded and privately-held companies, and we may not be able to hire new employees quickly enough to 
meet our needs. To attract highly skilled personnel, we have had to offer, and believe we will need to continue to offer, 
highly competitive compensation packages. In addition, as we have grown, we have significantly expanded our operating 
lease commitments. As we continue to grow, we are subject to the risks of over-hiring, over-compensating our employees 
and over-expanding our operating infrastructure, and to the challenges of integrating, developing and motivating a rapidly 
growing employee base in various countries around the world. In addition, we may not be able to innovate or execute as 
quickly as a smaller, more efficient organization. If we fail to effectively manage our hiring needs and successfully 
integrate our new hires, our efficiency and ability to meet our forecasts and our employee morale, productivity and 
retention could suffer, and our business and operating results could be adversely affected.  

Providing our products and services to our users is costly and we expect our expenses to continue to increase in the 

future as we broaden our user base and increase user engagement, as users increase the amount of content they 
contribute, and as we develop and implement new features, products and services that require more infrastructure, such 
as our mobile video product, Vine. In addition, our operating expenses, such as our research and development expenses 
and sales and marketing expenses, have grown rapidly as we have expanded our business. Historically, our costs have 
increased each year due to these factors and we expect to continue to incur increasing costs to support our anticipated 
future growth. We expect to continue to invest in our infrastructure in order to enable us to provide our products and 
services rapidly and reliably to users around the world, including in countries where we do not expect significant near-term 
monetization. Continued growth could also strain our ability to maintain reliable service levels for our users and 
advertisers, develop and improve our operational, financial, legal and management controls, and enhance our reporting 
systems and procedures. As a public company we incur significant legal, accounting and other expenses that we did not 
incur as a private company. Our expenses may grow faster than our revenue, and our expenses may be greater than we 
anticipate. Managing our growth will require significant expenditures and allocation of valuable management resources. If 
we fail to achieve the necessary level of efficiency in our organization as it grows, our business, operating results and 
financial condition would be harmed.  

20 

 
Our business and operating results may be harmed by a disruption in our service, or by our failure to timely and 
effectively scale and adapt our existing technology and infrastructure.  

One of the reasons people come to Twitter is for real-time information. We have experienced, and may in the future 

experience, service disruptions, outages and other performance problems due to a variety of factors, including 
infrastructure changes, human or software errors, hardware failure, capacity constraints due to an overwhelming number 
of people accessing our products and services simultaneously, computer viruses and denial of service or fraud or security 
attacks. In March 2014, we experienced unexpected complications that made Twitter unavailable for many users for 
approximately fifteen minutes. We rolled back the change that caused such complications as soon as we identified the 
issue and Twitter fully recovered within approximately forty-five minutes of the initial service disruption. Additionally, 
although we are investing significantly to improve the capacity, capability and reliability of our infrastructure, we are not 
currently serving traffic equally through our co-located data centers that support our platform. Accordingly, in the event of 
a significant issue at the data center supporting most of our network traffic, some of our products and services may 
become inaccessible to the public or the public may experience difficulties accessing our products and services. Any 
disruption or failure in our infrastructure could hinder our ability to handle existing or increased traffic on our platform, 
which could significantly harm our business.  

As the number of our users increases and our users generate more content, including photos and videos hosted by 

Twitter, we may be required to expand and adapt our technology and infrastructure to continue to reliably store, serve and 
analyze this content. It may become increasingly difficult to maintain and improve the performance of our products and 
services, especially during peak usage times, as our products and services become more complex and our user traffic 
increases. In addition, because we lease our data center facilities, we cannot be assured that we will be able to expand 
our data center infrastructure to meet user demand in a timely manner, or on favorable economic terms. If our users are 
unable to access Twitter or we are not able to make information available rapidly on Twitter, users may seek other 
channels to obtain the information, and may not return to Twitter or use Twitter as often in the future, or at all. This would 
negatively impact our ability to attract users, platform partners and advertisers and increase engagement of our users. We 
expect to continue to make significant investments to maintain and improve the capacity, capability and reliability of our 
infrastructure. To the extent that we do not effectively address capacity constraints, upgrade our systems as needed and 
continually develop our technology and infrastructure to accommodate actual and anticipated changes in technology, our 
business and operating results may be harmed.  

Action by governments to restrict access to our products and services or censor Twitter content could harm our 
business and operating results.  

Governments have sought, and may in the future seek, to censor content available through our products and 

services, restrict access to our products and services from their country entirely or impose other restrictions that may 
affect the accessibility of our products and services for an extended period of time or indefinitely. For example, domestic 
Internet service providers in China have blocked access to Twitter, and other countries, including Iran, Libya, Pakistan, 
Turkey and Syria, have intermittently restricted access to Twitter, and we believe that access to Twitter has been blocked 
in these countries primarily for political reasons. In addition, governments in these or other countries may seek to restrict 
access to our products and services based on our decisions around user content, providing user information in response 
to governmental requests, or other matters. In the event that access to our products and services is restricted, in whole or 
in part, in one or more countries or our competitors are able to successfully penetrate geographic markets that we cannot 
access, our ability to retain or increase our user base and user engagement may be adversely affected, and our operating 
results may be harmed.  

21 

 
If we are unable to maintain and promote our brand, our business and operating results may be harmed.  

We believe that maintaining and promoting our brand is critical to expanding our base of users, platform partners 

and advertisers. Maintaining and promoting our brand will depend largely on our ability to continue to provide useful, 
reliable and innovative products and services, which we may not do successfully. We may introduce new features, 
products, services or terms of service that users, platform partners or advertisers do not like, which may negatively affect 
our brand. Additionally, the actions of platform partners may affect our brand if users do not have a positive experience 
using third-party applications or websites integrated with Twitter or that make use of Twitter content. Our brand may also 
be negatively affected by the actions of users that are hostile or inappropriate to other people, by users impersonating 
other people, by users identified as spam, by users introducing excessive amounts of spam on our platform or by third 
parties obtaining control over users’ accounts. For example, in April 2013, attackers obtained the credentials to the Twitter 
account of the Associated Press news service through a “phishing” attack targeting Associated Press employees. The 
attackers posted an erroneous Tweet from the Associated Press account reporting that there had been explosions at the 
White House, triggering a stock market decline, and focusing media attention on our brand and security efforts. 
Maintaining and enhancing our brand may require us to make substantial investments and these investments may not 
achieve the desired goals. If we fail to successfully promote and maintain our brand or if we incur excessive expenses in 
this effort, our business and operating results could be adversely affected.  

Negative publicity could adversely affect our business and operating results.  

We receive a high degree of media coverage around the world. Negative publicity about our company, including 

about our product quality and reliability, changes to our products and services, privacy and security practices, litigation, 
regulatory activity, the actions of our users or user experience with our products and services, even if inaccurate, could 
adversely affect our reputation and the confidence in and the use of our products and services. For example, service 
outages on Twitter typically result in widespread media reports. Such negative publicity could also have an adverse effect 
on the size, engagement and loyalty of our user base and result in decreased revenue, which could adversely affect our 
business and operating results.  

Our future performance depends in part on support from platform partners and data partners.  

We believe user engagement with our products and services depends in part on the availability of applications and 
content generated by platform partners. In 2012, we launched Twitter Cards, which allow platform partners to ensure that 
whenever they or any user tweets from their websites or applications, the Tweet will automatically include rich content like 
a photo, a video, a sound clip, an article summary or information about a product, and make it instantly accessible to any 
other user on Twitter. Twitter Cards allow platform partners to create lightweight interactive applications to promote their 
content or their products. The availability and development of these applications and content depends on platform 
partners’ perceptions and analysis of the relative benefits of developing applications and content for our products and 
services and we are taking tangible steps to support our developers’ efforts to build, grow, and monetize their 
applications.  For instance, in October 2014, we launched Fabric, a mobile software development kit that helps developers 
build more stable applications, gives them the ability to generate revenue through Twitter’s mobile ad exchange, MoPub, 
and provides them with the ability to tap into Twitter’s sign-in systems for simpler identity verification.If platform partners 
focus their efforts on other platforms despite these and other efforts, the availability and quality of applications and content 
for our products and services may suffer. There is no assurance that platform partners will continue to develop and 
maintain applications and content for our products and services. If platform partners cease to develop and maintain 
applications and content for our products and services, user engagement may decline. In addition, we generate revenue 
from licensing our historical and real-time data to third parties. If any of these relationships are terminated or not renewed, 
or if we are unable to enter into similar relationships in the future, our operating results could be adversely affected.  

22 

 
We focus on product innovation and user engagement rather than short-term operating results.  

We encourage employees to quickly develop and help us launch new and innovative features. We focus on 
improving the user experience for our products and services, which includes protecting user privacy, and on developing 
new and improved products and services for the advertisers on our platform. We prioritize innovation and the experience 
for users and advertisers on our platform over short-term operating results. We frequently make product and service 
decisions that may reduce our short-term operating results if we believe that the decisions are consistent with our goals to 
improve the user experience and performance for advertisers, which we believe will improve our operating results over the 
long term. These decisions may not be consistent with the short-term expectations of investors and may not produce the 
long-term benefits that we expect, in which case our user growth and user engagement, our relationships with advertisers 
and our business and operating results could be harmed. In addition, our focus on the user experience may negatively 
impact our relationships with our existing or prospective advertisers. This could result in a loss of advertisers, which could 
harm our revenue and operating results.  

Our international operations are subject to increased challenges and risks.  

We have offices around the world and our products and services are available in multiple languages. We expect to 

continue to expand our international operations in the future by opening offices in new jurisdictions and expanding our 
offerings in new languages. However, we have limited operating history outside the United States, and our ability to 
manage our business and conduct our operations internationally requires considerable management attention and 
resources and is subject to the particular challenges of supporting a rapidly growing business in an environment of 
multiple languages, cultures, customs, legal and regulatory systems, alternative dispute systems and commercial 
markets. International expansion has required and will continue to require us to invest significant funds and other 
resources. Operating internationally subjects us to new risks and may increase risks that we currently face, including risks 
associated with:  

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recruiting and retaining talented and capable employees in foreign countries and maintaining our company 
culture across all of our offices;  

providing our products and services and operating across a significant distance, in different languages and 
among different cultures, including the potential need to modify our products, services, content and features to 
ensure that they are culturally relevant in different countries;  

increased competition from local websites, mobile applications and services that provide real-time 
communications, such as Sina Weibo in China, LINE in Japan and Kakao in South Korea, which have 
expanded and may continue to expand their geographic footprint;  

differing and potentially lower levels of user growth, user engagement and ad engagement in new and 
emerging geographies;  

different levels of advertiser demand;  

greater difficulty in monetizing our products and services;  

compliance with applicable foreign laws and regulations, including laws and regulations with respect to privacy, 
consumer protection, spam and content, and the risk of penalties to our users and individual members of 
management if our practices are deemed to be out of compliance;  

longer payment cycles in some countries;  

credit risk and higher levels of payment fraud;  

operating in jurisdictions that do not protect intellectual property rights to the same extent as the United States;  

compliance with anti-bribery laws including, without limitation, compliance with the Foreign Corrupt Practices 
Act and the U.K. Bribery Act, including by our business partners;  

currency exchange rate fluctuations;  

foreign exchange controls that might require significant lead time in setting up operations in certain geographic 
territories and might prevent us from repatriating cash earned outside the United States;  

political and economic instability in some countries;  

double taxation of our international earnings and potentially adverse tax consequences due to changes in the 
tax laws of the United States or the foreign jurisdictions in which we operate; and  

23 

 
• 

higher costs of doing business internationally, including increased accounting, travel, infrastructure and legal 
compliance costs.  

If we are unable to manage the complexity of our global operations successfully, our business, financial condition 

and operating results could be adversely affected.  

Our products and services may contain undetected software errors, which could harm our business and 
operating results.  

Our products and services incorporate complex software and we encourage employees to quickly develop and help 

us launch new and innovative features. Our software, including any open source software that is incorporated into our 
code, has contained, and may now or in the future contain, errors, bugs or vulnerabilities. For example, in March 2014, we 
were alerted to, and fixed, a bug in our system that, for approximately 94,000 protected accounts under rare 
circumstances, allowed non-approved followers to receive protected tweets via SMS or push notifications since November 
2013. Additionally, in December 2014, we experienced a brief service outage during which Twitter was inaccessible as a 
result of a software bug in one of our infrastructure components. Some errors in our software code may only be 
discovered after the product or service has been released. Any errors, bugs or vulnerabilities discovered in our code after 
release could result in damage to our reputation, loss of users, loss of platform partners, loss of advertisers or advertising 
revenue or liability for damages, any of which could adversely affect our business and operating results.  

Our business is subject to complex and evolving U.S. and foreign laws and regulations. These laws and 
regulations are subject to change and uncertain interpretation, and could result in claims, changes to our 
business practices, monetary penalties, increased cost of operations or declines in user growth, user 
engagement or ad engagement, or otherwise harm our business.  

We are subject to a variety of laws and regulations in the United States and abroad that involve matters central to 
our business, including privacy, rights of publicity, data protection, content regulation, intellectual property, competition, 
protection of minors, consumer protection, credit card processing and taxation. Many of these laws and regulations are 
still evolving and being tested in courts and could be interpreted or applied in ways that could harm our business, 
particularly in the new and rapidly evolving industry in which we operate. The introduction of new products or services 
may subject us to additional laws and regulations. In addition, foreign data protection, privacy, consumer protection, 
content regulation and other laws and regulations are often more restrictive than those in the United States. In particular, 
the European Union and its member states traditionally have taken broader views as to types of data that are subject to 
privacy and data protection, and have imposed greater legal obligations on companies in this regard. A number of 
proposals are pending before federal, state and foreign legislative and regulatory bodies that could significantly affect our 
business. For example, regulation relating to the 1995 European Union Data Protection Directive is currently being 
considered by European legislative bodies that may include more stringent operational requirements for entities 
processing personal information and significant penalties for non-compliance. Additionally, a European Parliament Inquiry 
has recently indicated that it will recommend suspension of the EU – U.S. Safe Harbor Framework as part of this 
regulation. We rely upon the EU – U.S. Safe Harbor Framework to transfer certain personal information of European 
Union residents to the United States, and revocation of the Safe Harbor Framework could require us to create duplicative, 
and potentially expensive, information technology infrastructure and business operations in Europe or limit our ability to 
collect and use personal information collected in Europe. Any of these could disrupt our business. Similarly, there have 
been a number of recent legislative proposals in the United States, at both the federal and state level, that would impose 
new obligations in areas such as privacy and liability for copyright infringement by third parties. The U.S. government, 
including the FTC and the Department of Commerce, has announced that it is reviewing the need for greater regulation 
for the collection of information concerning user behavior on the Internet, including regulation aimed at restricting certain 
online tracking and targeted advertising practices. Additionally, recent amendments to U.S. patent laws may affect the 
ability of companies, including us, to protect their innovations and defend against claims of patent infringement. We 
currently allow use of our platform without the collection of extensive personal information, such as age. We may 
experience additional pressure to expand our collection of personal information in order to comply with new and additional 
regulatory demands or we may independently decide to do so. Having additional personal information may subject us to 
additional regulation. Further, it is difficult to predict how existing laws and regulations will be applied to our business and 
the new laws and regulations to which we may become subject, and it is possible that they may be interpreted and applied 
in a manner that is inconsistent from country to country and inconsistent with our current policies and practices. These 
existing and proposed laws and regulations can be costly to comply with and can delay or impede the development of 
new products and services, result in negative publicity, significantly increase our operating costs, require significant time 
and attention of management and technical personnel and subject us to inquiries or investigations, claims or other 
remedies, including fines or demands that we modify or cease existing business practices.  

24 

 
Regulatory investigations and settlements could cause us to incur additional expenses or change our business 
practices in a manner materially adverse to our business.  

We have been subject to regulatory investigations in the past, and expect to continue to be subject to regulatory 
scrutiny as our business grows and awareness of our brand increases. In March 2011, to resolve an investigation into 
various incidents, we entered into a settlement agreement with the FTC that, among other things, requires us to establish 
an information security program designed to protect non-public consumer information and also requires that we obtain 
biennial independent security assessments. The obligations under the settlement agreement remain in effect until the later 
of March 2, 2031, or the date 20 years after the date, if any, on which the U.S. government or the FTC files a complaint in 
federal court alleging any violation of the order. We expect to continue to be the subject of regulatory inquiries, 
investigations and audits in the future by the FTC and other regulators around the world.  

It is possible that a regulatory inquiry, investigation or audit might result in changes to our policies or practices, and 

may cause us to incur substantial costs or could result in reputational harm, prevent us from offering certain products, 
services, features or functionalities, cause us to incur substantial costs or require us to change our business practices in a 
manner materially adverse to our business. Violation of existing or future regulatory orders, settlements or consent 
decrees could subject us to substantial monetary fines and other penalties that could negatively affect our financial 
condition and operating results.  

Even though Twitter is a global platform for public self-expression and conversation, user trust regarding privacy 
is important to the growth of users and the increase in user engagement on our platform, and privacy concerns 
relating to our products and services could damage our reputation and deter current and potential users and 
advertisers from using Twitter.  

From time to time, concerns have been expressed by governments, regulators and others about whether our 
products, services or practices compromise the privacy of users and others. Concerns about, governmental or regulatory 
actions involving our practices with regard to the collection, use, disclosure or security of personal information or other 
privacy-related matters, even if unfounded, could damage our reputation, cause us to lose users and advertisers and 
adversely affect our operating results. While we strive to comply with applicable data protection laws and regulations, as 
well as our own posted privacy policies and other obligations we may have with respect to privacy and data protection, the 
failure or perceived failure to comply may result, and in some cases has resulted, in inquiries and other proceedings or 
actions against us by governments, regulators or others, as well as negative publicity and damage to our reputation and 
brand, each of which could cause us to lose users and advertisers, which could have an adverse effect on our business.  

In March 2014, we were alerted to, and fixed, a bug in our system that, for approximately 94,000 protected accounts 
under rare circumstances, allowed non-approved followers to receive protected tweets via SMS or push notifications since 
November 2013. We expect to continue to expend significant resources to protect against security breaches. The risk that 
these types of events could seriously harm our business is likely to increase as we expand the number of products and 
services we offer, increase the size of our user base and operate in more countries.  

Governments and regulators around the world are considering a number of legislative and regulatory proposals 

concerning data protection and privacy. In addition, the interpretation and application of consumer and data protection 
laws or regulations in the United States, Europe and elsewhere are often uncertain and in flux, and in some cases, laws or 
regulations in one country may be inconsistent with, or contrary to, those of another country. It is possible that these laws 
and regulations may be interpreted and applied in a manner that is inconsistent with our practices. If so, in addition to the 
possibility of fines, this could result in an order requiring that we change our practices, which could have an adverse effect 
on our business and operating results. Complying with new laws and regulations could cause us to incur substantial costs 
or require us to change our business practices in a manner materially adverse to our business.  

25 

 
If our security measures are breached, or if our products and services are subject to attacks that degrade or deny 
the ability of users to access our products and services, our products and services may be perceived as not 
being secure, users and advertisers may curtail or stop using our products and services and our business and 
operating results could be harmed.  

Our products and services involve the storage and transmission of users’ and advertisers’ information, and security 

breaches expose us to a risk of loss of this information, litigation and potential liability. We experience cyber-attacks of 
varying degrees on a regular basis, and as a result, unauthorized parties have obtained, and may in the future obtain, 
access to our data or our users’ or advertisers’ data. For example, in February 2013, we disclosed that sophisticated 
unknown third parties had attacked our systems and may have had access to limited information for approximately 
250,000 users. We also work with third party vendors to process credit card payments by our customers and are subject 
to payment card association operating rules. Any systems failure or compromise of our security that results in the 
unauthorized access to or release of our users’ or advertisers’ data, such as credit card data, could significantly limit the 
adoption of our products and services, as well as harm our reputation and brand and, therefore, our business. Our 
security measures may also be breached due to employee error, malfeasance or otherwise. Additionally, outside parties 
may attempt to fraudulently induce employees, users or advertisers to disclose sensitive information in order to gain 
access to our data or our users’ or advertisers’ data or accounts, or may otherwise obtain access to such data or 
accounts. Since our users and advertisers may use their Twitter accounts to establish and maintain online identities, 
unauthorized communications from Twitter accounts that have been compromised may damage their reputations and 
brands as well as ours. Because the techniques used to obtain unauthorized access, disable or degrade service or 
sabotage systems change frequently and often are not recognized until launched against a target, we may be unable to 
anticipate these techniques or to implement adequate preventative measures. If a perceived breach of our security occurs 
or an actual breach of our security that results in website performance, unauthorized access, availability problems, or the 
loss or unauthorized disclosure of confidential information, such as credit card information, occurs, the market perception 
of the effectiveness of our security measures could be harmed, our users and advertisers may be harmed, lose trust and 
confidence in us or decrease the use of our website and services or stop using our services in their entirety and we may 
incur significant legal and financial exposure, including legal claims, higher transaction fees and regulatory fines and 
penalties. Any of these actions could have a material and adverse effect on our business, reputation and operating 
results.  

We may face lawsuits or incur liability as a result of content published or made available through our products 
and services.  

We have faced and will continue to face claims relating to content that is published or made available through our 
products and services or third party products or services. In particular, the nature of our business exposes us to claims 
related to defamation, intellectual property rights, rights of publicity and privacy, illegal content, content regulation and 
personal injury torts. The laws relating to the liability of providers of online products or services for activities of their users 
remains somewhat unsettled, both within the United States and internationally. This risk may be enhanced in certain 
jurisdictions outside the United States where we may be less protected under local laws than we are in the United States. 
In addition, the public nature of communications on our network exposes us to risks arising from the creation of 
impersonation accounts intended to be attributed to our users or advertisers. We could incur significant costs investigating 
and defending these claims. If we incur costs or liability as a result of these events occurring, our business, financial 
condition and operating results could be adversely affected.  

Our intellectual property rights are valuable, and any inability to protect them could reduce the value of our 
products, services and brand.  

Our trade secrets, trademarks, copyrights, patents and other intellectual property rights are important assets for us. 

We rely on, and expect to continue to rely on, a combination of confidentiality and license agreements with our 
employees, consultants and third parties with whom we have relationships, as well as trademark, trade dress, domain 
name, copyright, trade secret and patent laws, to protect our brand and other intellectual property rights. However, various 
events outside of our control pose a threat to our intellectual property rights, as well as to our products, services and 
technologies. For example, we may fail to obtain effective intellectual property protection, or effective intellectual property 
protection may not be available in every country in which our products and services are available. Also, the efforts we 
have taken to protect our intellectual property rights may not be sufficient or effective, and any of our intellectual property 
rights may be challenged, which could result in them being narrowed in scope or declared invalid or unenforceable. There 
can be no assurance our intellectual property rights will be sufficient to protect against others offering products or services 
that are substantially similar to ours and compete with our business.  

26 

 
We rely on non-patented proprietary information and technology, such as trade secrets, confidential information, 

know-how and technical information. While in certain cases we have agreements in place with employees and third 
parties that place restrictions on the use and disclosure of this intellectual property, these agreements may be breached, 
or this intellectual property may otherwise be disclosed or become known to our competitors, which could cause us to lose 
any competitive advantage resulting from this intellectual property.  

We are pursuing registration of trademarks and domain names in the United States and in certain jurisdictions 
outside of the United States. Effective protection of trademarks and domain names is expensive and difficult to maintain, 
both in terms of application and registration costs as well as the costs of defending and enforcing those rights. We may be 
required to protect our rights in an increasing number of countries, a process that is expensive and may not be successful 
or which we may not pursue in every country in which our products and services are distributed or made available.  

We are party to numerous agreements that grant licenses to third parties to use our intellectual property, including 

our trademarks. For example, many third parties distribute their content through Twitter, or embed Twitter content in their 
applications or on their websites, and make use of our trademarks in connection with their services. If the licensees of our 
trademarks are not using our trademarks properly, it may limit our ability to protect our trademarks and could ultimately 
result in our trademarks being declared invalid or unenforceable. We have a policy designed to assist third parties in the 
proper use of our brand, trademarks and other assets, and we have an internal team dedicated to enforcing our policy and 
protecting our brand. Our brand protection team routinely receives and reviews reports of improper and unauthorized use 
of the Twitter brand, trademarks or assets and issues takedown notices or initiates discussions with the third parties to 
correct the issues. However, there can be no assurance that we will be able to protect against the unauthorized use of our 
brand, trademarks or other assets. If we fail to maintain and enforce our trademark rights, the value of our brand could be 
diminished. There is also a risk that one or more of our trademarks could become generic, which could result in them 
being declared invalid or unenforceable. For example, there is a risk that the word “Tweet” could become so commonly 
used that it becomes synonymous with any short comment posted publicly on the Internet, and if this happens, we could 
lose protection of this trademark.  

We also seek to obtain patent protection for some of our technology and as of December 31, 2014, we had 969 
issued U.S. patents. We may be unable to obtain patent or trademark protection for our technologies and brands, and our 
existing patents and trademarks, and any patents or trademarks that may be issued in the future, may not provide us with 
competitive advantages or distinguish our products and services from those of our competitors. In addition, any patents 
and trademarks may be contested, circumvented, or found unenforceable or invalid, and we may not be able to prevent 
third parties from infringing, diluting or otherwise violating them. Effective protection of patent rights is expensive and 
difficult to maintain, both in terms of application and maintenance costs, as well as the costs of defending and enforcing 
those rights.  

Our Innovator’s Patent Agreement, or IPA, also limits our ability to prevent infringement of our patents. In May 2013, 
we implemented the IPA, which we enter into with our employees and consultants, including our founders. The IPA, which 
applies to our current and future patents, allows us to assert our patents defensively. The IPA also allows us to assert our 
patents offensively with the permission of the inventors of the applicable patent. Under the IPA, an assertion of claims is 
considered for a defensive purpose if the claims are asserted: (i) against an entity that has filed, maintained, threatened or 
voluntarily participated in a patent infringement lawsuit against us or any of our users, affiliates, customers, suppliers or 
distributors; (ii) against an entity that has used its patents offensively against any other party in the past ten years, so long 
as the entity has not instituted the patent infringement lawsuit defensively in response to a patent litigation threat against 
the entity; or (iii) otherwise to deter a patent litigation threat against us or our users, affiliates, customers, suppliers or 
distributors. In addition, the IPA provides that the above limitations apply to any future owner or exclusive licensee of any 
of our patents, which could limit our ability to sell or license our patents to third parties. While we may be able to claim 
protection of our intellectual property under other rights, such as trade secrets or contractual obligations with our 
employees not to disclose or use confidential information, we may be unable to assert our patent rights against third 
parties that we believe are infringing our patents, even if such third parties are developing products and services that 
compete with our products and services. For example, in the event that an inventor of one of our patents leaves us for 
another company and uses our patented technology to compete with us, we would not be able to assert that patent 
against such other company unless the assertion of the patent right is for a defensive purpose. In such event, we may be 
limited in our ability to assert a patent right against another company, and instead would need to rely on trade secret 
protection or the contractual obligation of the inventor to us not to disclose or use our confidential information. In addition, 
the terms of the IPA could affect our ability to monetize our intellectual property portfolio.  

Significant impairments of our intellectual property rights, and limitations on our ability to assert our intellectual 

property rights against others, could harm our business and our ability to compete.  

27 

 
Also, obtaining, maintaining and enforcing our intellectual property rights is costly and time consuming. Any increase 

in the unauthorized use of our intellectual property could make it more expensive to do business and harm our operating 
results.  

We are currently, and expect to be in the future, party to intellectual property rights claims that are expensive and 
time consuming to defend, and, if resolved adversely, could have a significant impact on our business, financial 
condition or operating results.  

Companies in the Internet, technology and media industries are subject to litigation based on allegations of 
infringement, misappropriation or other violations of intellectual property or other rights. Many companies in these 
industries, including many of our competitors, have substantially larger patent and intellectual property portfolios than we 
do, which could make us a target for litigation as we may not be able to assert counterclaims against parties that sue us 
for patent, or other intellectual property infringement. In addition, various “non-practicing entities” that own patents and 
other intellectual property rights often attempt to assert claims in order to extract value from technology companies. From 
time to time we receive claims from third parties which allege that we have infringed upon their intellectual property rights. 
In this regard, we received a letter from International Business Machines Corporation, or IBM, alleging that we infringe on 
at least three U.S. patents held by IBM, and inviting us to negotiate a business resolution of the allegations. In December 
2013, we acquired over 900 patents from IBM, which significantly increased the size of our patent portfolio and entered 
into a patent cross-license.  Further, from time to time we may introduce new products and services, including in areas 
where we currently do not have an offering, which could increase our exposure to patent and other intellectual property 
claims from competitors and non-practicing entities. In addition, although our standard terms and conditions for our 
Promoted Products and public APIs do not provide advertisers and platform partners with indemnification for intellectual 
property claims against them, some of our agreements with advertisers, platform partners and data partners require us to 
indemnify them for certain intellectual property claims against them, which could require us to incur considerable costs in 
defending such claims, and may require us to pay significant damages in the event of an adverse ruling. Such advertisers, 
platform partners and data partners may also discontinue use of our products, services and technologies as a result of 
injunctions or otherwise, which could result in loss of revenue and adversely impact our business.  

We presently are involved in a number of intellectual property lawsuits, and as we face increasing competition and 

gain an increasingly high profile, we expect the number of patent and other intellectual property claims against us to grow. 
There may be intellectual property or other rights held by others, including issued or pending patents, that cover 
significant aspects of our products and services, and we cannot be sure that we are not infringing or violating, and have 
not infringed or violated, any third-party intellectual property rights or that we will not be held to have done so or be 
accused of doing so in the future. Any claim or litigation alleging that we have infringed or otherwise violated intellectual 
property or other rights of third parties, with or without merit, and whether or not settled out of court or determined in our 
favor, could be time-consuming and costly to address and resolve, and could divert the time and attention of our 
management and technical personnel. Some of our competitors have substantially greater resources than we do and are 
able to sustain the costs of complex intellectual property litigation to a greater degree and for longer periods of time than 
we could. The outcome of any litigation is inherently uncertain, and there can be no assurances that favorable final 
outcomes will be obtained in all cases. In addition, plaintiffs may seek, and we may become subject to, preliminary or 
provisional rulings in the course of any such litigation, including potential preliminary injunctions requiring us to cease 
some or all of our operations. We may decide to settle such lawsuits and disputes on terms that are unfavorable to us. 
Similarly, if any litigation to which we are a party is resolved adversely, we may be subject to an unfavorable judgment 
that may not be reversed upon appeal. The terms of such a settlement or judgment may require us to cease some or all of 
our operations or pay substantial amounts to the other party. In addition, we may have to seek a license to continue 
practices found to be in violation of a third-party’s rights. If we are required, or choose to enter into royalty or licensing 
arrangements, such arrangements may not be available on reasonable terms, or at all, and may significantly increase our 
operating costs and expenses. As a result, we may also be required to develop or procure alternative non-infringing 
technology or discontinue use of the technology. The development or procurement of alternative non-infringing technology 
could require significant effort and expense or may not be feasible. An unfavorable resolution of the disputes and litigation 
referred to above could adversely affect our business, financial condition and operating results.  

28 

 
Many of our products and services contain open source software, and we license some of our software through 
open source projects, which may pose particular risks to our proprietary software, products, and services in a 
manner that could have a negative effect on our business.  

We use open source software in our products and services and will use open source software in the future. In 

addition, we regularly contribute software source code to open source projects under open source licenses or release 
internal software projects under open source licenses, and anticipate doing so in the future. The terms of many open 
source licenses to which we are subject have not been interpreted by U.S. or foreign courts, and there is a risk that open 
source software licenses could be construed in a manner that imposes unanticipated conditions or restrictions on our 
ability to provide or distribute our products or services. Additionally, we may from time to time face claims from third 
parties claiming ownership of, or demanding release of, the open source software or derivative works that we developed 
using such software, which could include our proprietary source code, or otherwise seeking to enforce the terms of the 
applicable open source license. These claims could result in litigation and could require us to make our software source 
code freely available, purchase a costly license or cease offering the implicated products or services unless and until we 
can re-engineer them to avoid infringement. This re-engineering process could require significant additional research and 
development resources, and we may not be able to complete it successfully. In addition to risks related to license 
requirements, use of certain open source software can lead to greater risks than use of third-party commercial software, 
as open source licensors generally do not provide warranties or controls on the origin of software. Additionally, because 
any software source code we contribute to open source projects is publicly available, our ability to protect our intellectual 
property rights with respect to such software source code may be limited or lost entirely, and we are unable to prevent our 
competitors or others from using such contributed software source code. Any of these risks could be difficult to eliminate 
or manage, and, if not addressed, could have a negative effect on our business, financial condition and operating results.  

We may require additional capital to support our operations or the growth of our business, and we cannot be 
certain that this capital will be available on reasonable terms when required, or at all.  

From time to time, we may need additional financing to operate or grow our business. Our ability to obtain additional 

financing, if and when required, will depend on investor and lender demand, our operating performance, the condition of 
the capital markets and other factors, and we cannot assure you that additional financing will be available to us on 
favorable terms when required, or at all. If we raise additional funds through the issuance of equity, equity-linked or debt 
securities, those securities may have rights, preferences or privileges senior to the rights of our common stock, and our 
existing stockholders may experience dilution. If we are unable to obtain adequate financing or financing on terms 
satisfactory to us when we require it, our ability to continue to support the operation or growth of our business could be 
significantly impaired and our operating results may be harmed.  

We rely on assumptions and estimates to calculate certain of our key metrics, and real or perceived inaccuracies 
in such metrics may harm our reputation and negatively affect our business.  

The numbers of our active users and timeline views are calculated using internal company data that has not been 

independently verified. While these numbers are based on what we believe to be reasonable calculations for the 
applicable period of measurement, there are inherent challenges in measuring usage and user engagement across our 
large user base around the world. For example, there are a number of false or spam accounts in existence on our 
platform. We estimate that false or spam accounts represent less than 5% of our MAUs. However, this estimate is based 
on an internal review of a sample of accounts and we apply significant judgment in making this determination. As such, 
our estimation of false or spam accounts may not accurately represent the actual number of such accounts, and the 
actual number of false or spam accounts could be higher than we have currently estimated. We are continually seeking to 
improve our ability to estimate the total number of spam accounts and eliminate them from the calculation of our active 
users, but we otherwise treat multiple accounts held by a single person or organization as multiple users for purposes of 
calculating our active users because we permit people and organizations to have more than one account. Additionally, 
some accounts used by organizations are used by many people within the organization. As such, the calculations of our 
active users may not accurately reflect the actual number of people or organizations using our platform.  

Our metrics are also affected by mobile applications that automatically contact our servers for regular updates with 

no discernable user action involved, and this activity can cause our system to count the user associated with such a 
device as an active user on the day such contact occurs. The calculations of MAUs presented in this Annual Report on 
Form 10-K may be affected by this activity. The impact of this automatic activity on our metrics varies by geography 
because mobile application usage varies in different regions of the world. In addition, our data regarding user geographic 
location is based on the IP address associated with the account when a user initially registered the account on Twitter. 
The IP address may not always accurately reflect a user’s actual location at the time of such user’s engagement on our 
platform.  

29 

 
We regularly review and may adjust our processes for calculating our internal metrics to improve their accuracy. Our 
measures of user growth and user engagement may differ from estimates published by third parties or from similarly-titled 
metrics of our competitors due to differences in methodology. If advertisers, platform partners or investors do not perceive 
our user metrics to be accurate representations of our user base or user engagement, or if we discover material 
inaccuracies in our user metrics, our reputation may be harmed and advertisers and platform partners may be less willing 
to allocate their budgets or resources to our products and services, which could negatively affect our business and 
operating results. Further, as our business develops, we may revise or cease reporting metrics if we determine that such 
metrics are no longer accurate or appropriate measures of our performance.  For example, we recently announced that 
we do not intend to disclose timeline views for any future period as we do not believe that metric is helpful in measuring 
engagement on our platform going forward.  If investors, analysts or customers do not believe our reported measures of 
user engagement are sufficient or accurately reflect our business, we may receive negative publicity and our operating 
results may be harmed. 

We depend on highly skilled personnel to grow and operate our business, and if we are unable to hire, retain and 
motivate our personnel, we may not be able to grow effectively.  

Our future success will depend upon our continued ability to identify, hire, develop, motivate and retain highly skilled 
personnel, including senior management, engineers, designers and product managers. Our ability to execute efficiently is 
dependent upon contributions from our employees, in particular our senior management team. We do not have 
employment agreements other than offer letters with any member of our senior management or other key employee, and 
we do not maintain key person life insurance for any employee. In addition, from time to time, there may be changes in 
our senior management team that may be disruptive to our business. If our senior management team, including any new 
hires that we may make, fails to work together effectively and to execute our plans and strategies on a timely basis, our 
business could be harmed.  

Our growth strategy also depends on our ability to expand and retain our organization with highly skilled personnel. 

Identifying, recruiting, training and integrating qualified individuals will require significant time, expense and attention. In 
addition to hiring new employees, we must continue to focus on retaining our best employees. Because of our initial public 
offering, many of our employees are able to receive significant proceeds from sales of our equity in the public markets, 
which may reduce their motivation to continue to work for us. Competition for highly skilled personnel is intense, 
particularly in the San Francisco Bay Area, where our headquarters is located. We may need to invest significant amounts 
of cash and equity to attract and retain new employees and we may never realize returns on these investments. If we are 
not able to effectively add and retain employees, our ability to achieve our strategic objectives will be adversely impacted, 
and our business will be harmed.  

Our corporate culture has contributed to our success, and if we cannot maintain this culture as we grow, we 
could lose the innovation, creativity and teamwork fostered by our culture, and our business may be harmed.  

We believe that our culture has been and will continue to be a key contributor to our success. From January 1, 2010 

to December 31, 2014, we increased the size of our workforce by approximately 3,500 full-time employees, and we 
expect to continue to hire aggressively as we expand. If we do not continue to develop our corporate culture or maintain 
our core values as we grow and evolve, we may be unable to foster the innovation, creativity and teamwork we believe we 
need to support our growth. Our transition from a private company to a public company may result in a change to our 
corporate culture, which could harm our business.  

30 

 
We rely in part on application marketplaces and Internet search engines to drive traffic to our products and 
services, and if we fail to appear high up in the search results or rankings, traffic to our platform could decline 
and our business and operating results could be adversely affected.  

We rely on application marketplaces, such as Apple’s App Store and Google’s Play, to drive downloads of our 

mobile applications. In the future, Apple, Google or other operators of application marketplaces may make changes to 
their marketplaces which make access to our products and services more difficult. We also depend in part on Internet 
search engines, such as Google, Bing and Yahoo, to drive traffic to our website. For example, when a user types an 
inquiry into a search engine, we rely on a high organic search result ranking of our webpages in these search results to 
refer the user to our website. However, our ability to maintain high organic search result rankings is not within our control. 
Our competitors’ search engine optimization, or SEO, efforts may result in their websites receiving a higher search result 
page ranking than ours, or Internet search engines could revise their methodologies in a way that would adversely affect 
our search result rankings. For example, Google has integrated its social networking offerings, including Google+, with 
certain of its products, including search, which has negatively impacted the organic search ranking of our webpages. If 
Internet search engines modify their search algorithms in ways that are detrimental to us, or if our competitors’ SEO 
efforts are more successful than ours, the growth in our user base could slow. Our website has experienced fluctuations in 
search result rankings in the past, and we anticipate similar fluctuations in the future. Any reduction in the number of users 
directed to our mobile applications or website through application marketplaces and search engines could harm our 
business and operating results.  

More people are using devices other than personal computers to access the Internet and new platforms to 
produce and consume content, and we need to continue to promote the adoption of our mobile applications, and 
our business and operating results may be harmed if we are unable to do so.  

The number of people who access the Internet through devices other than personal computers, including mobile 
phones, smartphones, handheld computers such as net books and tablets, video game consoles and television set-top 
devices, has increased dramatically in the past few years. In the three months ended December 31, 2014, over 85% of 
our advertising revenue was generated from mobile devices. Since we generate a majority of our advertising revenue 
through users on mobile devices, we must continue to drive adoption of our mobile applications. However, in emerging 
markets like India and Pakistan, most users use feature phones and communicate via SMS messaging, both of which 
have limited functionality and neither of which may be able to take full advantage of our products and services offered on 
smartphone or our website or desktop applications.  In addition, mobile users frequently change or upgrade their mobile 
devices. Our business and operating results may be harmed if our users do not install our mobile application when they 
change or upgrade their mobile device. Although we generate the majority of our advertising revenue from ad 
engagements on mobile devices, certain of our products and services, including Promoted Trends and Promoted 
Accounts, receive less prominence on our mobile applications than they do on our desktop applications. This has in the 
past reduced, and may in the future continue to reduce, the amount of revenue we are able to generate from these 
products and services as users increasingly access our products and services through mobile and alternative devices. In 
addition, as new devices and platforms are continually being released, users may consume content in a manner that is 
more difficult to monetize. It is difficult to predict the problems we may encounter in adapting our products and services 
and developing competitive new products and services that are compatible with new devices or platforms. If we are 
unable to develop products and services that are compatible with new devices and platforms, or if we are unable to drive 
continued adoption of our mobile applications, our business and operating results may be harmed.  

Future acquisitions and investments could disrupt our business and harm our financial condition and operating 
results.  

Our success will depend, in part, on our ability to expand our products and services, and grow our business in 
response to changing technologies, user and advertiser demands, and competitive pressures. In some circumstances, we 
may determine to do so through the acquisition of complementary businesses and technologies rather than through 
internal development, including, for example, our acquisitions of Vine Labs, Inc., a mobile application that enables users 
to create and distribute videos that are up to six seconds in length, MoPub, Inc., a mobile-focused advertising exchange 
and Gnip, Inc., a company that provides social data analysis and was formerly a Twitter data partner. The identification of 
suitable acquisition candidates can be difficult, time-consuming and costly, and we may not be able to successfully 
complete identified acquisitions. The risks we face in connection with acquisitions include:  

• 

• 

diversion of management time and focus from operating our business to addressing acquisition integration 
challenges;  

coordination of research and development and sales and marketing functions;  

31 

 
• 

• 

• 

• 

• 

• 

• 

retention of key employees from the acquired company;  

cultural challenges associated with integrating employees from the acquired company into our organization;  

integration of the acquired company’s accounting, management information, human resources and other 
administrative systems and processes;  

the need to implement or improve controls, procedures, and policies at a business that prior to the acquisition 
may have lacked effective controls, procedures and policies;  

liability for activities of the acquired company before the acquisition, including intellectual property infringement 
claims, violations of laws, commercial disputes, tax liabilities and other known and unknown liabilities;  

unanticipated write-offs or charges; and  

litigation or other claims in connection with the acquired company, including claims from terminated 
employees, users, former stockholders or other third parties.  

Our failure to address these risks or other problems encountered in connection with our past or future acquisitions 

and investments could cause us to fail to realize the anticipated benefits of these acquisitions or investments, cause us to 
incur unanticipated liabilities, and harm our business generally. Future acquisitions could also result in dilutive issuances 
of our equity securities, the incurrence of debt, contingent liabilities, amortization expenses, incremental operating 
expenses or the impairment of goodwill, any of which could harm our financial condition or operating results.  

If we fail to maintain an effective system of disclosure controls and internal control over financial reporting, our 
ability to produce timely and accurate financial statements or comply with applicable regulations could be 
impaired.  

As a public company, we are subject to the reporting requirements of the Securities Exchange Act of 1934, as 
amended, or the Exchange Act, the Sarbanes-Oxley Act of 2002, as amended, or the Sarbanes-Oxley Act, and the listing 
standards of the New York Stock Exchange. We expect that the requirements of these rules and regulations will continue 
to increase our legal, accounting and financial compliance costs, make some activities more difficult, time consuming and 
costly, and place significant strain on our personnel, systems and resources.  

The Sarbanes-Oxley Act requires, among other things, that we maintain effective disclosure controls and procedures 

and internal control over financial reporting. We are continuing to develop and refine our disclosure controls and other 
procedures that are designed to ensure that information required to be disclosed by us in the reports that we will file with 
the SEC is recorded, processed, summarized and reported within the time periods specified in SEC rules and forms, and 
that information required to be disclosed in reports under the Exchange Act is accumulated and communicated to our 
principal executive and financial officers. We are also continuing to improve our internal control over financial reporting. In 
order to maintain and improve the effectiveness of our disclosure controls and procedures and internal control over 
financial reporting, we have expended, and anticipate that we will continue to expend, significant resources, including 
accounting-related costs and significant management oversight.  

Our current controls and any new controls that we develop may become inadequate because of changes in 
conditions in our business. Further, weaknesses in our disclosure controls or our internal control over financial reporting 
may be discovered in the future. Any failure to develop or maintain effective controls, or any difficulties encountered in 
their implementation or improvement, could harm our operating results or cause us to fail to meet our reporting obligations 
and may result in a restatement of our financial statements for prior periods. Any failure to implement and maintain 
effective internal control over financial reporting also could adversely affect the results of management evaluations and 
independent registered public accounting firm audits of our internal control over financial reporting that we are required to 
include in our periodic reports that will be filed with the SEC. Ineffective disclosure controls and procedures and internal 
control over financial reporting could also cause investors to lose confidence in our reported financial and other 
information, which would likely have a negative effect on the trading price of our common stock. In addition, if we are 
unable to continue to meet these requirements, we may not be able to remain listed on the New York Stock Exchange.  

Any failure to maintain effective disclosure controls and internal control over financial reporting could have a material 

and adverse effect on our business and operating results, and cause a decline in the price of our common stock.  

32 

 
If currency exchange rates fluctuate substantially in the future, our operating results, which are reported in U.S. 
dollars, could be adversely affected.  

As we continue to expand our international operations, we will become more exposed to the effects of fluctuations in 

currency exchange rates. We incur expenses for employee compensation and other operating expenses at our 
international locations in the local currency, and accept payment from advertisers or data partners in currencies other than 
the U.S. dollar. Since we conduct business in currencies other than U.S. dollars but report our operating results in U.S. 
dollars, we face exposure to fluctuations in currency exchange rates. Consequently, exchange rate fluctuations between 
the U.S. dollar and other currencies could have a material impact on our operating results.  

Our business is subject to the risks of earthquakes, fire, power outages, floods and other catastrophic events, 
and to interruption by man-made problems such as terrorism.  

A significant natural disaster, such as an earthquake, fire, flood or significant power outage could have a material 
adverse impact on our business, operating results, and financial condition. Our headquarters and certain of our co-located 
data center facilities are located in the San Francisco Bay Area, a region known for seismic activity. Despite any 
precautions we may take, the occurrence of a natural disaster or other unanticipated problems at our data centers could 
result in lengthy interruptions in our services. In addition, acts of terrorism and other geo-political unrest could cause 
disruptions in our business. All of the aforementioned risks may be further increased if our disaster recovery plans prove 
to be inadequate. We have implemented a disaster recovery program, which allows us to move production to a back-up 
data center in the event of a catastrophe. Although this program is functional, we do not currently serve network traffic 
equally from each data center, so if our primary data center shuts down, there will be a period of time that our products or 
services, or certain of our products or services, will remain inaccessible to our users or our users may experience severe 
issues accessing our products and services.  

We do not carry business interruption insurance sufficient to compensate us for the potentially significant losses, 
including the potential harm to our business that may result from interruptions in our ability to provide our products and 
services.  

We may have exposure to greater than anticipated tax liabilities, which could adversely impact our operating 
results.  

Our income tax obligations are based in part on our corporate operating structure, including the manner in which we 

develop, value and use our intellectual property and the scope of our international operations. The tax laws applicable to 
our international business activities, including the laws of the United States and other jurisdictions, are subject to 
interpretation. The taxing authorities of the jurisdictions in which we operate may challenge our methodologies for valuing 
developed technology (or other intangible assets) or intercompany arrangements, which could increase our worldwide 
effective tax rate and harm our financial condition and operating results. We are subject to review and audit by U.S. 
federal and state and foreign tax authorities. Tax authorities may disagree with certain positions we have taken and any 
adverse outcome of such a review or audit could have a negative effect on our financial position and operating results. In 
addition, our future 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, as 
well as certain discrete items. Greater than anticipated tax expenses, or disputes with tax authorities, could adversely 
impact our operating results.  

If our goodwill or intangible assets become impaired, we may be required to record a significant charge to 
earnings.  

Under generally accepted accounting principles in the United States, or U.S. GAAP, we review our intangible assets 
for impairment when events or changes in circumstances indicate the carrying value may not be recoverable. Goodwill is 
required to be tested for impairment at least annually. As of December 31, 2014, we had recorded a total of $727.6 million 
of goodwill and intangible assets related to our acquisitions. An adverse change in market conditions, particularly if such 
change has the effect of changing one of our critical assumptions or estimates, could result in a change to the estimation 
of fair value that could result in an impairment charge to our goodwill or intangible assets. Any such material charges may 
have a material negative impact on our operating results.  

33 

 
Our ability to use our net operating loss carryforwards and certain other tax attributes may be limited.  

As of December 31, 2014, we had U.S. federal net operating loss carryforwards of approximately $2.60 billion and 

state net operating loss carryforwards of approximately $1.00 billion. Under Sections 382 and 383 of Internal Revenue 
Code of 1986, as amended, or the Code, if a corporation undergoes an “ownership change,” the corporation’s ability to 
use its pre-change net operating loss carryforwards and other pre-change tax attributes, such as research tax credits, to 
offset its post-change income and taxes may be limited. In general, an “ownership change” occurs if there is a cumulative 
change in our ownership by “5% shareholders” that exceeds 50 percentage points over a rolling three-year period. Similar 
rules may apply under state tax laws. In the event that it is determined that we have in the past experienced an ownership 
change, or if we experience one or more ownership changes as a result of future transactions in our stock, then we may 
be limited in our ability to use our net operating loss carryforwards and other tax assets to reduce taxes owed on the net 
taxable income that we earn. Any such limitations on the ability to use our net operating loss carryforwards and other tax 
assets could adversely impact our business, financial condition and operating results.  

Risks Related to Ownership of Our Common Stock  

Anti-takeover provisions contained in our amended and restated certificate of incorporation and amended and 
restated bylaws, as well as provisions of Delaware law, could impair a takeover attempt.  

Our amended and restated certificate of incorporation, amended and restated bylaws and Delaware law contain 

provisions which could have the effect of rendering more difficult, delaying, or preventing an acquisition deemed 
undesirable by our board of directors. Among other things, our amended and restated certificate of incorporation and 
amended and restated bylaws include provisions:  

• 

• 

• 

• 

• 

• 

creating a classified board of directors whose members serve staggered three-year terms;  

authorizing “blank check” preferred stock, which could be issued by our board of directors without stockholder 
approval and may contain voting, liquidation, dividend and other rights superior to our common stock;  

limiting the liability of, and providing indemnification to, our directors and officers;  

limiting the ability of our stockholders to call and bring business before special meetings;  

requiring advance notice of stockholder proposals for business to be conducted at meetings of our 
stockholders and for nominations of candidates for election to our board of directors; and  

controlling the procedures for the conduct and scheduling of board of directors and stockholder meetings.  

These provisions, alone or together, could delay or prevent hostile takeovers and changes in control or changes in 

our management.  

As a Delaware corporation, we are also subject to provisions of Delaware law, including Section 203 of the Delaware 

General Corporation law, which prevents certain stockholders holding more than 15% of our outstanding common stock 
from engaging in certain business combinations without approval of the holders of at least two-thirds of our outstanding 
common stock not held by such 15% or greater stockholder.  

Any provision of our amended and restated certificate of incorporation, amended and restated bylaws or Delaware 

law that has the effect of delaying, preventing or deterring a change in control could limit the opportunity for our 
stockholders to receive a premium for their shares of our common stock, and could also affect the price that some 
investors are willing to pay for our common stock.  

The market price of our common stock has been and will likely continue to be volatile, and you could lose all or 
part of your investment.  

The market price of our common stock has been and may continue to be subject to wide fluctuations in response to 

various factors, some of which are beyond our control. Since shares of our common stock were sold in our initial public 
offering in November 2013 at a price of $26.00 per share, the reported high and low sales prices of our common stock has 
ranged from $74.73 to $29.51, through December 31, 2014. In addition to the factors discussed in this “Risk Factors” 
section and elsewhere in this Annual Report on Form 10-K, factors that could cause fluctuations in the market price of our 
common stock include the following:  

• 

• 

price and volume fluctuations in the overall stock market from time to time;  

volatility in the market prices and trading volumes of technology stocks;  

34 

 
• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

changes in operating performance and stock market valuations of other technology companies generally, or 
those in our industry in particular;  

sales of shares of our common stock by us or our stockholders;  

our issuance of shares of our common stock, whether in connection with an acquisition or upon conversion of 
some or all of our outstanding Notes; 

failure of securities analysts to maintain coverage of us, changes in financial estimates by securities analysts 
who follow our company, or our failure to meet these estimates or the expectations of investors;  

the financial projections we may provide to the public, any changes in those projections or our failure to meet 
those projections;  

announcements by us or our competitors of new products or services;  

the public’s reaction to our press releases, other public announcements and filings with the SEC;  

rumors and market speculation involving us or other companies in our industry;  

actual or anticipated changes in our operating results or fluctuations in our operating results;  

actual or anticipated developments in our business, our competitors’ businesses or the competitive landscape 
generally;  

litigation involving us, our industry or both, or investigations by regulators into our operations or those of our 
competitors;  

developments or disputes concerning our intellectual property or other proprietary rights;  

announced or completed acquisitions of businesses or technologies by us or our competitors;  

new laws or regulations or new interpretations of existing laws or regulations applicable to our business;  

changes in accounting standards, policies, guidelines, interpretations or principles;  

any significant change in our management; and  

general economic conditions and slow or negative growth of our markets.  

The price of our common stock could also be affected by possible sales of our common stock by investors who view 

the Notes as a more attractive means of equity participation in us and by hedging or arbitrage trading activity that we 
expect to develop involving our common stock.  

In addition, in the past, following periods of volatility in the overall market and the market price of a particular 
company’s securities, securities class action litigation has often been instituted against these companies. This litigation, if 
instituted against us, could result in substantial costs and a diversion of our management’s attention and resources.  

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

Concurrently with the issuance of the Notes, we entered into note hedge transactions with certain financial 

institutions, which we refer to as the option counterparties. The note hedge transactions are generally expected to reduce 
the potential dilution upon any 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. 

The option counterparties or their respective affiliates may modify their initial hedge positions by entering into or 
unwinding various derivatives contracts 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 change repurchase date or otherwise). This activity could cause or avoid an increase or a decrease in the 
market price of our common stock. 

35 

 
In addition, if any such convertible note hedge and warrant transactions fail to become effective, the option 
counterparties or their respective affiliates may unwind their hedge positions with respect to our common stock, which 
could adversely affect the value of our common stock. 

We are subject to counterparty risk with respect to the note hedge transactions. 

The option counterparties are financial institutions or affiliates of financial institutions, and we are subject to the risk 

that these option counterparties may default under the note hedge transactions. Our exposure to the credit risk of the 
option counterparties is not secured by any collateral. If one or more of the option counterparties to one or more of our 
note hedge transactions becomes subject to insolvency proceedings, we will become an unsecured creditor in those 
proceedings with a claim equal to our exposure at the time under those transactions. Our exposure will depend on many 
factors but, generally, the increase in our exposure will be correlated to the increase in the market price of our common 
stock and in the volatility of the market price of our common stock. In addition, upon a default by one of the option 
counterparties, we may suffer adverse tax consequences and dilution with respect to our common stock. We can provide 
no assurances as to the financial stability or viability of any of the option counterparties. 

If securities or industry analysts do not publish or cease publishing research or reports about us, our business 
or our market, or if they change their recommendations regarding our common stock adversely, the price of our 
common stock and trading volume could decline.  

The trading market for our common stock is influenced, to some extent, by the research and reports that securities 

or industry analysts publish about us, our business, our industry, our market or our competitors. If any of the analysts who 
cover us change their recommendation regarding our common stock adversely, or provide more favorable relative 
recommendations about our competitors, the price of our common stock would likely decline. If any analysts who cover us 
were to cease coverage of our company or fail to regularly publish reports on us, we could lose visibility in the financial 
markets, which in turn could cause the price of our common stock or trading volume to decline.  

We do not expect to declare any dividends in the foreseeable future.  

We do not anticipate declaring any cash dividends to holders of our common stock in the foreseeable future. In 

addition, our credit facility contains restrictions on payments including payments of cash dividends.  Consequently, 
investors may need to rely on sales of their common stock after price appreciation, which may never occur, as the only 
way to realize any future gains on their investment. Investors seeking cash dividends should not purchase our common 
stock. 

Item 1B. UNRESOLVED STAFF COMMENTS  

None.  

Item 2. PROPERTIES  
Facilities  

As of December 31, 2014, we leased office facilities around the world totaling approximately 1,583,000 square feet, 

including 828,000 square feet for our corporate headquarters in San Francisco, California.  We also lease data center 
facilities in the United States pursuant to various lease agreements and co-location arrangements with data center 
operators. We believe our facilities are sufficient for our current needs.  

36 

 
Item 3. LEGAL PROCEEDINGS  
Legal Proceedings  

We are currently involved in, and may in the future be involved in, legal proceedings, claims and government 
investigations in the ordinary course of business. We are involved in litigation, and may in the future be involved in 
litigation, with third parties asserting, among other things, infringement of their intellectual property rights. In addition, the 
nature of our business exposes us to claims related to defamation, rights of publicity and privacy, and personal injury torts 
resulting from information that is published or made available on our platform. This risk is enhanced in certain jurisdictions 
outside the United States where our protection from liability for content published on our platform by third parties may be 
unclear and where we may be less protected under local laws than we are in the United States. Although the results of the 
legal proceedings, claims and government investigations in which we are involved cannot be predicted with certainty, we 
do not believe that there is a reasonable possibility that the final outcome of these matters will have a material adverse 
effect on our business, financial condition or operating results. 

Future litigation may be necessary, among other things, to defend ourselves, our platform partners and our users by 
determining the scope, enforceability, and validity of third-party proprietary rights or to establish our proprietary rights. The 
results of any current or future litigation cannot be predicted with certainty, and regardless of the outcome, litigation can 
have an adverse impact on us because of defense and settlement costs, diversion of management resources and other 
factors.  

Item 4. MINE SAFETY DISCLOSURE  

Not applicable.  

37 

 
 
 
PART II  

Item 5. MARKET FOR REGISTRANT’S COMMON EQUITY RELATED STOCKHOLDER MATTERS AND ISSUER 
PURCHASES OF EQUITY SECURITIES  
Market Information for Common Stock  

Our common stock has been listed on the New York Stock Exchange under the symbol “TWTR” since November 7, 
2013. Prior to that date, there was no public trading market for our common stock. The following table sets forth the high 
and low sales price per share of our common stock as reported on the New York Stock Exchange for the periods 
indicated:  

First Quarter ..............................................................    $
Second Quarter .........................................................     
Third Quarter .............................................................     
Fourth Quarter (1) .......................................................     

70.43     $
47.59      
53.64      
55.99      

43.31    
29.51    
35.95    
34.62     $ 

n/a   
n/a   
n/a   
74.73      $

n/a
n/a
n/a
38.80

2014 

2013 

High 

Low 

High 

Low 

(1) The period reported for the fourth quarter of 2013 is from November 7, 2013 through December 31, 2013. 

Holders of Record  

As of February 17, 2015, there were 807 holders of record of our common stock. Because many of our shares of 
common stock are held by brokers and other institutions on behalf of stockholders, we are unable to estimate the total 
number of stockholders represented by these record holders. 

Dividend Policy  

We have never declared or paid any cash dividends on our capital stock. We intend to retain any future earnings 

and do not expect to pay any dividends in the foreseeable future. Any future determination to declare cash dividends will 
be made at the discretion of our board of directors, subject to applicable laws, and will depend on a number of factors, 
including our financial condition, results of operations, capital requirements, contractual restrictions, general business 
conditions and other factors that our board of directors may deem relevant. In addition, the credit facility contains 
restrictions on payments including cash payments of dividends. 

Unregistered Sales of Equity Securities  

Shares Issued in Connection with Acquisitions 

From January 1, 2014 through December 31, 2014, we issued an aggregate of 5,662,544 shares of our common 

stock in connection with our acquisitions of certain companies or their assets and as consideration to individuals and 
entities who were former service providers and/or stockholders of such companies. 

None of the foregoing transactions involved any underwriters, underwriting discounts or commissions, or any public 

offering. We believe the offers, sales and issuances of the above securities were exempt from registration under the 
Securities Act by virtue of Section 4(2) of the Securities Act because the issuance of securities to the recipients did not 
involve a public offering, or in reliance on Rule 701 because the transactions were pursuant to compensatory benefit 
plans or contracts relating to compensation as provided under such rule. The recipients of the securities in each of these 
transactions represented their intentions to acquire the securities for investment only and not with a view to or for sale in 
connection with any distribution thereof, and appropriate legends were placed upon the stock certificates issued in these 
transactions. All recipients had adequate access, through their relationships with us, to information about us. The sales of 
these securities were made without any general solicitation or advertising. 

38 

 
 
 
  
 
 
 
  
 
 
 
 
 
     
  
      
       
       
         
 
Perfo

ormance Gra

aph  

This perform
ion 18 of the 
er that Section
urities Act of 1

mance graph s
Securities Ex
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1933, as ame

shall not be d
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ot be deemed
nded, or the E

deemed “solici
of 1934, as am
d to be incorp
Exchange Ac

iting material
mended (Exch
porated by ref
ct.  

Secti
unde
Secu

” or to be “file
hange Act), o
ference into a

ed” with the S
or otherwise s
any filing of Tw

EC for purpos
subject to the 
witter, Inc. un

ses of 
liabilities 

nder the 

The following
ulative total re
nternet Comp
mon stock an
ve performan
ntended to su

g graph comp
eturns of the S
osite. An inve
d in each inde
nce is tracked
uggest future 

pares the cum
mulative total 
Standard & P
Poor’s 500 Ind
estment of $1
00 (with reinv
ex on Novem
mber 7, 2013, 
cember 31, 20
d through Dec
. 
performance.

cumu
DJ In
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not in

return to stoc
dex, or S&P 5
vestment of a
the date our c
014. The retu

ckholders on o
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all dividends) 
common stoc
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our common 
Dow Jones Int
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stock relative
ternet Compo
o have been m
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YSE, and its 
lts and are 

r 

180.00 

160.00 

140.00 

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n

I

120.00 

100.00 

80.00 

60.00 

Trade Date

Twitter, Inc.

DJ Internet Composite

S&P 500

39 

 
 
 
 
Item 6. SELECTED FINANCIAL DATA  

The following selected historical consolidated financial data should be read in conjunction with Part II, Item 7, 

“Management’s Discussion and Analysis of Financial Condition and Results of Operations”, our consolidated financial 
statements and the related notes included in Item 8, “Financial Statements and Supplementary Data” of this Annual 
Report on Form 10-K.  

The consolidated statements of operations data for the years ended December 31, 2014, 2013 and 2012 and the 

consolidated balance sheet data as of December 31, 2014 and 2013 are derived from our audited consolidated financial 
statements included in Part II, Item 8, “Financial Statements and Supplementary Data” in this Annual Report on Form 
10-K. The consolidated statements of operations data for the year ended December 31, 2011 and 2010 and the 
consolidated balance sheet data as of December 31, 2012, 2011 and 2010 are derived from our audited consolidated 
financial statements not included in this Annual Report on Form 10-K. Our historical results are not necessarily indicative 
of the results that may be expected in the future and our interim results are not necessarily indicative of results to be 
expected for the full fiscal year.  

Year Ended December 31, 

2014

2013

2011
(In thousands, except per share data)

2012 

2010

Consolidated Statement of Operations Data: 
Revenue ................................................................................... $1,403,002 $ 664,890 $ 316,933    $  106,313 $ 28,278
Costs and expenses(1) 

43,168
Cost of revenue ...................................................................
29,348
Research and development ................................................
6,289
Sales and marketing ............................................................
16,952
General and administrative .................................................
95,757
Total costs and expenses ...............................................
(67,479)
Loss from operations ......................................................
55
Interest income (expense), net .................................................
(117)
Other income (expense), net ....................................................
(67,541)
Loss before income taxes ........................................................
Provision (benefit) for income taxes .........................................
(217)
Net loss ..................................................................................... $ (577,820) $ (645,323) $ (79,399 )  $ (128,302) $ (67,324)
-
Deemed dividend to investors in relation to the tender offer....
Net loss attributable to common stockholders ......................... $ (577,820) $ (645,323) $ (79,399 )  $ (164,118) $ (67,324)
Net loss per share attributable to common stockholders:

266,718  128,768       61,803
593,992  119,004       80,176
316,216   86,551       25,988
123,795   59,693       65,757
1,300,721  394,016       233,724
(635,831)   (77,083 )    (127,411)
(805)
(1,530)
(647,146)   (79,170 )    (129,746)
(1,444)

446,309
691,543
614,110
189,906
1,941,868
(538,866)
(33,985)
(5,500)
(578,351)
(531)

(6,860)  
(4,455)  

(2,486 )    
399      

-       35,816

(1,823)  

229      

-

-

Basic and diluted ............................................................ $

(0.96) $

(3.41) $ 

(0.68 )  $ 

(1.60) $

(0.89)

Weighted-average shares used to compute net loss per 
share attributable to common stockholders: 

Basic and diluted ............................................................

604,990

189,510  117,401       102,544

75,992

Other Financial Information:(2) 
Adjusted EBITDA ..................................................................... $ 300,896 $
Non-GAAP net income (loss) ................................................... $ 101,071 $

75,430 $  21,164    $  (42,835) $ (51,184)
(34,330) $ (35,191 )  $  (65,533) $ (54,066)

(1)  Costs and expenses include stock-based compensation expense as follows:  

Cost of revenue ......................................................................... $ 50,536 $ 50,942 $
Research and development ......................................................
Sales and marketing ..................................................................
General and administrative .......................................................

379,913
114,440
55,072

360,726
157,263
63,072

800     $  1,820 $

12,622        33,559
1,553
10,973        23,452

1,346       

Total stock-based compensation ......................................... $ 631,597 $ 600,367 $ 25,741     $  60,384 $

2014

2013

Year Ended December 31,
2012 
(In thousands) 

2011

2010

200
3,409
249
2,073
5,931

(2)  See the section titled “Non-GAAP Financial Measures” below for additional information and a reconciliation of net 

loss to Adjusted EBITDA and net loss to non-GAAP net income (loss).  

40 

 
 
 
  
  
   
  
   
       
   
       
 
   
       
   
       
   
       
 
 
  
  
     
  
 
 
2014 

2013 

2012 

2011 

2010 

As of December 31, 

(In thousands) 

Consolidated Balance Sheet Data: 
Cash and cash equivalents ......................................................  $1,510,724 $ 841,010 $  203,328    $  218,996  $134,253 
Short-term investments ............................................................    2,111,154   1,393,044   221,528       330,543    43,484 
Working capital .........................................................................    3,862,059   2,349,249   444,587       548,324    167,088 
Property and equipment, net ....................................................   
332,662   185,574       61,983    26,385 
Total assets ..............................................................................    5,583,082   3,366,240   831,568       720,675    224,473 
— 
Convertible notes .....................................................................    1,376,020  
416,234   207,204       87,391    35,432 
Total liabilities ...........................................................................    1,956,679  
—  
—  
— 
Redeemable convertible preferred stock .................................   
—   835,430       835,073    279,534 
—  
Convertible preferred stock ......................................................   
Total stockholders' equity (deficit) ............................................    3,626,403   2,950,006   (248,172 )    (201,838)   (90,493)

557,019  

37,106      

—      

49   

—   

—  

Non-GAAP Financial Measures  

To supplement our consolidated financial statements presented in accordance with generally accepted accounting 

principles in the United States, or GAAP, we consider certain financial measures that are not prepared in accordance with 
GAAP, including Adjusted EBITDA and non-GAAP net income (loss). These non-GAAP financial measures are not based 
on any standardized methodology prescribed by GAAP and are not necessarily comparable to similarly-titled measures 
presented by other companies.  

Adjusted EBITDA  

We define Adjusted EBITDA as net loss adjusted to exclude stock-based compensation expense, depreciation and 

amortization expense, interest and other expenses and provision (benefit) for income taxes.  

The following table presents a reconciliation of net loss to Adjusted EBITDA for each of the periods indicated:  

2014 

2013 

Year Ended December 31, 
2012 
(In thousands) 

2011 

2010 

Reconciliation of Net Loss to Adjusted EBITDA 
Net loss ......................................................................................  $(577,820)  $(645,323)  $ (79,399 )   $ (128,302)  $ (67,324)
Stock-based compensation expense ...................................    631,597      600,367      25,741        60,384     
5,931 
Depreciation and amortization expense ...............................    208,165      110,894      72,506        24,192      10,364 
Interest and other expense, net............................................   
62 
(217)
Provision (benefit) for income taxes .....................................   
Adjusted EBITDA ......................................................................  $ 300,896    $ 75,430    $  21,164     $  (42,835)  $ (51,184)

11,315     
(1,823)   

39,485     
(531)   

2,335     
(1,444)   

2,087       
229       

Non-GAAP Net Income (Loss)  

We define non-GAAP net income (loss) as net loss adjusted to exclude stock-based compensation expense, 
amortization of acquired intangible assets, non-cash interest expense related to our convertible notes and the income tax 
effects related to acquisitions.  

41 

 
 
  
 
 
  
 
 
 
   
 
 
  
 
 
    
    
    
       
      
 
 
  
 
  
   
   
    
   
 
  
 
    
        
        
        
        
 
 
The following table presents a reconciliation of net loss to non-GAAP net income (loss) for each of the periods 

indicated: 

2014 

2013 

Year Ended December 31, 
2012 
(In thousands) 

2011 

2010 

Reconciliation of Net Loss to Non-GAAP Net Income 
(Loss) 
Net loss ......................................................................................  $(577,820)  $(645,323)  $ (79,399 )   $ (128,302)  $ (67,324)
5,931 
7,506 
— 
(179)
Non-GAAP net income (loss) ....................................................  $ 101,071    $ (34,330)  $ (35,191 )   $  (65,533)  $ (54,066)

Stock-based compensation expense ...................................    631,597      600,367      25,741        60,384     
4,697     
Amortization of acquired intangible assets ...........................   
—     
Non-cash interest expense related to convertible notes ......   
(2,312)   
Income tax effects related to acquisitions ............................   

16,530      18,687       
—       
(220 )     

36,563     
18,823     
(8,092)   

—     
(5,904)   

We use the non-GAAP financial measures of Adjusted EBITDA and non-GAAP net income (loss) in evaluating our 
operating results and for financial and operational decision-making purposes. We believe that Adjusted EBITDA and non-
GAAP net income (loss) help identify underlying trends in our business that could otherwise be masked by the effect of 
the expenses that we exclude in Adjusted EBITDA and non-GAAP net income (loss). We believe that Adjusted EBITDA 
and non-GAAP net income (loss) provide useful information about our operating results, enhance the overall 
understanding of our past performance and future prospects and allow for greater transparency with respect to key 
metrics used by our management in its financial and operational decision-making.  

These non-GAAP financial measures should not be considered in isolation from, or as a substitute for, financial 
information prepared in accordance with GAAP. There are a number of limitations related to the use of these non-GAAP 
financial measures rather than net loss, which is the nearest GAAP equivalent of these financial measures. Some of these 
limitations are:  

• 

• 

• 

• 

• 

These non-GAAP financial measures exclude certain recurring, non-cash charges such as stock-based 
compensation expense, amortization of acquired intangible assets and non-cash interest expense related to 
convertible notes;  

Stock-based compensation expense has been, and will continue to be for the foreseeable future, a significant 
recurring expense in our business and an important part of our compensation strategy;  

Adjusted EBITDA does not reflect tax payments that reduce cash available to us;  

Adjusted EBITDA excludes depreciation and amortization expense and, although these are non-cash charges, 
the property and equipment being depreciated and amortized may have to be replaced in the future; and  

The expenses that we exclude in our calculation of these non-GAAP financial measures may differ from the 
expenses, if any, that our peer companies may exclude from similarly-titled non-GAAP measures when they 
report their results of operations.  

We have attempted to compensate for these limitations by providing the nearest GAAP equivalents of these non-
GAAP financial measures and describing these GAAP equivalents under the section titled “Management’s Discussion and 
Analysis of Financial Condition and Results of Operations—Results of Operations.”  

42 

 
 
  
  
 
  
   
   
     
   
 
  
 
    
        
        
        
        
 
 
 
Item 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF 
OPERATIONS  

The following discussion and analysis of our financial condition and results of operations should be read in 

conjunction with the consolidated financial statements and related notes thereto included in Item 8 “Financial Statements 
and Supplemental Data” in this Annual Report on Form 10-K. This discussion contains forward-looking statements that 
involve risks and uncertainties. Our actual results could differ materially from those discussed below. Factors that could 
cause or contribute to such differences include, but are not limited to, those identified below and those discussed in the 
section titled “Risk Factors” included elsewhere in this Annual Report on Form 10-K.  

Overview  

The mission we serve as Twitter, Inc. is to give everyone the power to create and share ideas and information 
instantly without barriers.  We offer products and services for users, advertisers, developers and platform and data 
partners. Our goal is to reach the largest daily audience in the world through our information sharing and distribution 
platform products.  We believe that our audience is not limited to our users on the Twitter platform, but rather extends to a 
larger global audience, including users who are not logged in to Twitter and our syndication and SDK audiences.  

We have already achieved significant global scale, and we continue to grow. As of the three months ended 
December 31, 2014 we have more than 288 million MAUs spanning nearly every country. We believe the current total 
audience that views content on our platform, including logged in and logged out users but not including syndicated content, 
is two to three times the number of our MAUs. Our users include millions of people from around the world, as well as 
influential individuals and organizations.  

Our revenue for the year ended December 31, 2014 was $1.40 billion, which represents a 111% increase compared 

to 2013. We generate the substantial majority of our revenue from the sale of advertising services with the balance 
coming from data licensing arrangements and our mobile advertising exchange services. Mobile has become the primary 
driver of our business and we have been able to generate significant revenue through our mobile applications. 
Approximately 85% of our advertising revenue was generated from mobile devices in the year ended December 31, 2014.  

In 2014, we issued $935.0 million principal amount of 0.25% Convertible Senior Notes due in 2019, or the 2019 
Notes, and $954.0 million principal amount of 1.00% Convertible Senior Notes due in 2021, or the 2021 Notes (which 
together with the 2019 Notes, we refer to as the Notes), in private placements to qualified institutional buyers pursuant to 
Rule144A under the Securities Act of 1933, as amended. The total net proceeds from these offerings, after deducting 
initial purchasers’ discount and debt issuance costs, were approximately $1.86 billion.  Concurrently with the issuance of 
Notes, we entered into convertible note hedge transactions for which we paid $407.2 million. In addition, we sold warrants 
for which we received $289.3 million.  

Key Metrics  

We review a number of metrics, including the following key metrics, to evaluate our business, measure our 

performance, identify trends affecting our business, formulate business plans and make strategic decisions.  

Monthly Active Users (MAUs). We define MAUs as Twitter users who logged in or were otherwise authenticated and 

accessed Twitter through our website, mobile website, desktop or mobile applications, SMS or registered third-party 
applications or websites in the 30-day period ending on the date of measurement. Average MAUs for a period represent 
the average of the MAUs at the end of each month during the period. MAUs are a measure of the size of our active user 
base. In the three months ended December 31, 2014, we had 288 million average MAUs, which represents an increase of 
20% from the three months ended December 31, 2013. The growth in average MAUs was driven primarily by organic 
growth and growth initiatives. In the three months ended December 31, 2014, we had 63 million average MAUs in the 
United States and 225 million average MAUs in the rest of the world, which represent increases of 17% and 21%, 
respectively, from the three months ended December 31, 2013. For additional information on how we calculate MAUs and 
factors that can affect this metric, see the section titled “Note Regarding Key Metrics.” 

43 

 
 
Timeline Vie
otal number o
r timelines) or
site or deskto
believe that tim
oing optimizat
ted in timelin
d to report tim
U are calculate
 period. In the
s, respectivel
3, respectively
s in the Unite
ed December 
501.3 billion t
the three mo
ad 631 timeli
3. In the three
ine views per
ember 31, 201
ct this metric, 

ews, Timeline 
of timelines re
r view search
p or mobile a
meline views 
tion of our pro
e views beco
meline views 
ed by dividing
e three month
y, which repre
y. In the three
d States, resp
31, 2013, res
imeline views
onths and yea
ne views per 
 months ende
r MAU in the r
13. For additio
see the sectio

Views Per M
equested and 
results while
pplications (e
going forward
oducts has red
ming an unre
metric in futu
g the total time
hs and year e
esent increas
e months and 
pectively, whi
spectively. In 
s in the rest o
ar ended Dece
MAU, which 
ed December
rest of the wo
onal informat
on titled “Note

MAU and Adve
delivered wh
e such user is 
excluding our 
d will not be a
duced the nu
epresentative 
re filings but w
eline views fo
ended Decem
ses of 23% an
year ended D
ich represent 
the three mo
f the world, re
ember 31, 20
represents an
r 31, 2014, we
orld, which rep
ion on how w
e Regarding K

ertising Reven
hen registered
logged in or 
TweetDeck a
a helpful metr
mber of times
measure of u
we present it 
or the period b
ber 31, 2014,
nd 17% from t
December 31
increases of 
nths and yea
espectively, w
13, respective
n increase of 
e had 778 tim
present increa
we calculate th
Key Metrics.”

the to
other
webs
We b
ongo
resul
inten
MAU
such
views
2013
views
ende
and 5
from 
we h
2013
timel
Dece
affec

nue Per Time
d users visit T
is otherwise a
and Mac clien
ric for measur
s a user need
user engagem
here for histo
by the averag
, we had 182
the three mon
, 2014, we ha
20% and 16%
r ended Dece
which each re
ely. In the thr
3% from the 
meline views p
ases of 3% fr
he number of 

eline View. W
Twitter, refres
authenticated
nts, as we do 
ring user eng
ds to request 
ment with our 
orical purpose
ge MAUs for t
.0 billion and 
nths and year
ad 49.2 billion
% from the th
ember 31, 20
epresent an in
ree months en
three months
per MAU in th
rom the three 
timeline view

e define time
h a home tim
d on our webs
not fully track
agement bec
a timeline vie
platform.  We
es. Timeline v
the last three 
692.5 billion 
r ended Dece
n and 191.1 b
hree months a
14, we had 13
ncrease of 24%
nded Decemb
s ended Dece
e United Stat
months ende
ws and factors

line views as 
eline (but not
t 
site, mobile 
k this data). 
cause the 
s 
ew, which has
e do not 
views per 
months of 
timeline 
ember 31, 
e 
billion timeline
and year 
32.8 billion 
% and 17% 
ber 31, 2014, 
ember 31, 
tes and 590 
ed 
s that can 

44 

 
 
 
We define ad
od. In the three
esents a 60% 
4, our advertis
e rest of the w
3, respectively
users.  

perio
repre
2014
in the
2013
our u

dvertising reve
e months end
increase from
ing revenue p
world was $1.1
y. We record a

enue per time
ed December
m the three mo
per timeline vie
16, which repr
advertising rev

eline view as a
r 31, 2014, ou
onths ended D
ew in the Unit
resent increas
venue based o

advertising rev
ur advertising 
December 31,
ted States wa
ses of 49% an
on the billing 

venue per 1,0
revenue per t
, 2013. In the 
as $5.65 and o
nd 94% from t
location of ou

000 timeline v
timeline view 
three months
our advertising
the three mon
ur advertisers,

views during th
was $2.37, w
s ended Dece
g revenue pe
nths ended De
 rather than th

he applicable 
which 
ember 31, 
r timeline view
w 
ecember 31, 
he location of 

Facto

ors Affecting

g Our Future

e Performanc

ce  

User Growth
agement trend
ur user base 

h, User Engag
ds and monet
and the level 

gement and M
tization trends
of engageme

Monetization.
s reflected in 
ent of our use

User growth 
advertising e
ers grow, we b

trends reflect
ngagements
believe the po

ted in the num
are key facto
otential to inc

mber of MAUs
ors that affect 
crease our rev

s, user 
our revenue.
venue grows. 

enga
As ou

User Growth
her proportio
uture we expe
a and Japan, t
enges in ente
tries that hav
ersely impact o

h. We have ex
n of Internet u
ect our user g
to continue to
ering some m
ve intermittent
our ability to i

xperienced si
users in the U
growth rate in
o be higher tha
arkets, such a
tly restricted a
increase the s

gnificant grow
United States 
 certain intern
an our user g
as China, wh
access to Twi
size of our us

wth in our num
use Twitter th
national mark
growth rate in 
ere access to
itter. Restricti
ser base and g

mber of users
han Internet u
kets, such as A
the United S
o Twitter is blo
ons or limitat
generate add

s over the last
users in other
Argentina, Br
tates. Howev
ocked, as we
tions on acces
ditional revenu

t several year
r countries. A
razil, France, 
ver, we expec
ll as certain o
ss to Twitter m
ue in certain m

a hig
the fu
India
challe
coun
adve

ct to face 
other 
may 
markets.  

rs. In general
, 
n 
Accordingly, in
Germany, 

45 

 
 
 
 
 
We do not separately track whether an MAU has only used Twitter on a desktop or on a mobile device. However, in 

the three months ended December 31, 2014, approximately 80% of our average MAUs accessed Twitter from a mobile 
device, roughly flat from the three months ended December 31, 2013.  

We may face challenges in increasing the size of our user base, including, among others, competition from 
alternative products and services, a decline in the number of influential users on Twitter or a perceived decline in the 
quality of content or user experience available on Twitter. We intend to drive growth in our user base by continuing to 
demonstrate the value and usefulness of our products and services to potential new users, and by introducing new 
products, services and features. Our user growth rate has slowed over time, and we anticipate that it may continue to 
slow, with increases to the size of our user base. To the extent our user growth or user growth rate continues to slow, our 
revenue growth will become increasingly dependent on our ability to increase levels of user engagement and 
monetization.  

User Engagement. Two broad measures of user engagement on our platform in 2014 were timeline views and the 

number of timeline views per MAU. In the three months ended December 31, 2014, timeline views increased 23% and 
timeline views per MAU increased 3%, compared to the three months ended December 31, 2013. Timeline views per 
MAU during the three months ended December 31, 2014 stayed relatively flat compared to the three months ended 
September 30, 2014.  

Our most engaged users are generally those who access Twitter via our mobile applications. In the three months 

ended December 31, 2014, a substantial majority of timeline views were on mobile devices. We expect this trend of 
mobile users being more engaged to continue in the near term, and we plan to continue to develop and improve our 
mobile applications to further drive user adoption of these applications. We intend to continue to optimize our products to 
improve the overall user experience, and the changes we may make to our products may result in slower growth, or a 
decline, in the number of timeline views or the number of timeline views per MAU. To the extent user engagement as 
measured by timeline views and timeline views per MAU does not increase, our revenue growth will depend in large part 
on our ability to increase MAUs or monetization of our platform.  

Monetization.  There are many variables that impact the monetization of our platform through advertising, such as 
the number of MAUs, the general engagement of our users, the amount of advertising we choose to display, our users’ 
engagement with our Promoted Products, advertiser demand and cost per ad engagement. Generally, for our pay-for-
performance Promoted Products, we design our algorithms to optimize for the combined impact of a number of factors, 
including the overall user experience, the number of ads we deliver to a particular user, the likelihood that our users will 
engage with the ads, the value we deliver to advertisers and the impact of the advertisers’ bids. We design our algorithms 
to enhance the user experience by delivering relevant ads to a user based on that user’s Interest Graph, and these ads 
may contain information of interest to that user or may provide promotional offers that are not available anywhere else. 
Our algorithms also enhance the value that we deliver to advertisers because the targeting capabilities of our algorithms 
allow advertisers to deliver ads that are relevant to a user’s interests, thereby increasing the effectiveness of an 
advertiser’s advertising campaign.  

46 

 
 
We regularly refine our algorithms to drive monetization while maximizing the long-term value of our platform for our 

users and advertisers. Given the large number of variables that drive advertising revenue per timeline view, including 
decisions that we make regarding optimizing user experience and satisfying advertiser demand, certain individual 
components may decline while others increase. Ultimately, it is the combination of the changes in these components that 
impacts monetization. For example, advertising revenue has increased sequentially in each of the four quarters ended 
December 31, 2014, driven by sequential increases in paid user engagements with our pay-for-performance Promoted 
Products, or ad engagements, over those same periods, and sequential increases in average cost per ad engagement 
during a majority of the same periods. The number of ad engagements increased 29%, 4%, 13% and 18% sequentially in 
the three months ended March 31, 2014, June 30, 2014, September 30, 2014 and December 31, 2014, respectively. The 
increases in ad engagements over these periods were primarily due to increases in MAUs, increases in total ad requests, 
and strong advertiser demand. Average cost per ad engagement decreased 20% in the three months ended March 31, 
2014, and increased 18%, 3% and 14% sequentially in the three months ended June 30, 2014, September 30, 2014, and 
December 31, 2014, respectively. The decrease in cost per ad engagement over the three months ended March 31, 2014 
was primarily driven by higher ad engagements as a result of continued improvements made to our ad products and our 
prediction and targeting capabilities. The increases in cost per ad engagement over the last three quarters were primarily 
driven by a mix shift to higher priced and higher performing ad units as well as an increase in same format cost per ad 
engagement. We have also seen strong demand for advertising on our platform as demand outweighed the supply we 
made available. As we continue to optimize for advertiser value and the overall user experience, the cost per ad 
engagement may vary from period to period but we expect the cost per ad engagement to be relatively steady in the near 
term. We plan to increase the value of our Promoted Products by continuing to increase the size and engagement of our 
user base, improve our ability to target advertising to our users’ interests and improve the ability of our advertisers to 
optimize their campaigns and measure the results of their campaigns. We also believe our goal of maximizing the long-
term value of our platform for our users and advertisers should make Promoted Products more attractive to our existing 
and new advertisers and allow us to deliver more relevant ads on our platform.  

In addition, our advertising revenue per timeline view in the United States was substantially higher than our 

advertising revenue per timeline view in the rest of the world. For example, during the three months ended December 31, 
2014, our advertising revenue per timeline view in the United States was $5.65 and our advertising revenue per timeline 
view in the rest of the world was $1.16. We expect this disparity in monetization to continue in the near term. To the extent 
the number of international users and engagement by international users grow faster than U.S. users and engagement by 
U.S. users, our rate of monetization may be adversely impacted even if total advertising revenue continues to increase.  

In the three months ended December 31, 2014, over 85% of our advertising revenue was generated from mobile 
devices. We have experienced strong growth in advertising revenue from mobile devices because user engagement is 
significantly higher on mobile applications than on our desktop applications, and we expect this trend to continue. 
However, Promoted Accounts and Promoted Trends receive less prominence on our mobile applications than they do on 
our desktop applications, which means that fewer users see them displayed on our mobile applications, resulting in fewer 
ad engagements with Promoted Accounts and fewer impressions of Promoted Trends on mobile applications. Primarily as 
a result of Promoted Accounts and Promoted Trends receiving less prominence on mobile applications, we have 
generated higher monetization of our revenue per timeline view on our desktop applications than on our mobile 
applications. Although advertising revenue per timeline view on our desktop applications is higher than advertising 
revenue per timeline view on our mobile applications, the substantial majority of our timeline views and advertising 
revenue is generated from mobile applications.  

We intend to continue to increase the monetization of our platform by improving the targeting capabilities of our 
advertising services to enhance the value of our Promoted Products for advertisers, expanding our sales efforts to reach 
advertisers in additional international markets, opening our platform to additional advertisers through our self-serve 
advertising platform and developing new ad formats for advertisers.  

Effectiveness of Our Advertising Services. Advertisers can use Twitter to communicate directly with their followers 

for free, but many choose to purchase our advertising services to reach a broader audience and further promote their 
brands, products and services. We believe that increasing the effectiveness of our Promoted Products for advertisers will 
increase the amount that advertisers spend with us. We aim to increase the value of our Promoted Products by increasing 
the size and engagement of our user base, improving our ability to target advertising to our users’ interests and improving 
the ability of our advertisers to optimize their campaigns and measure the results of their campaigns. We may also 
develop new advertising products and services.  

47 

 
 
International Expansion. We intend to invest in our international operations in order to expand our user base and 

advertiser base and increase user engagement and monetization internationally. In the three months ended 
December 31, 2014, we had 225 million average MAUs internationally compared to 63 million average MAUs in the 
United States. In addition, our number of users is growing at a faster rate in many international markets, such as 
Argentina, Brazil, France, Germany, India and Japan. However, we derive the substantial majority of our advertising 
revenue from advertisers in the United States. We also generate significantly more advertising revenue per timeline view 
in the United States than internationally, with advertising revenue per timeline view in the three months ended 
December 31, 2014 of $5.65 in the United States and $1.16 internationally. Further, because we record advertising 
revenue based on the billing location of our advertisers, engagement by international users with ads placed by advertisers 
located in the United States increases our advertising revenue per timeline view in the United States. In order to increase 
our international advertising revenue, we plan to invest in our international operations. In the near term, we plan to 
increase the size of our sales and marketing support teams in international markets such as Brazil, Canada, Ireland and 
Singapore, and we plan to continue to extend our self-serve advertising platform to countries outside of the United States.  

We face challenges in increasing our advertising revenue internationally, including local competition, differences in 
advertiser demand, differences in the digital advertising market and conventions, and differences in the manner in which 
Twitter is accessed and used internationally. We face competition from well-established competitors in certain 
international markets. In addition, certain international markets are not as familiar with digital advertising in general, or 
with new forms of digital advertising, such as our Promoted Products. In these jurisdictions we are investing to educate 
advertisers about the benefits of our advertising services. However, we expect that it may require a significant investment 
of time and resources to educate advertisers in many international markets. We also face challenges in providing certain 
advertising products, features or analytics in certain international markets, such as the European Union, due to 
government regulation. In addition, in certain emerging markets, many users access Twitter through feature phones with 
limited functionality, rather than through smartphones, our website or desktop applications. This limits our ability to deliver 
certain features to these users and may limit the ability of advertisers to deliver compelling ads to users in these markets. 
We are investing to improve our applications for feature phones in order to improve our ability to monetize our products 
and services in international markets.  

Competition. We face significant competition for users and advertisers. We compete against many companies to 
attract and engage users and for advertiser spend, including companies with greater financial resources and substantially 
larger user bases which offer a variety of Internet and mobile device-based products, services and content. In recent 
years there has been a significant number of acquisitions and consolidation activity by and among our actual and potential 
competitors. We must compete effectively for users and advertisers in order to grow our business and increase our 
revenue. We believe that our ability to compete effectively for users depends upon a number of factors, including the 
quality of our products and services; and our ability to compete effectively for advertisers depends upon a number of 
factors, including our ability to offer attractive advertising products with unique targeting capabilities and the size of our 
active user base. We intend to continue to invest in research and development to improve our products and services for 
users and advertisers and to grow our active user base in order to address the competitive challenges in our industry. As 
part of our strategy to improve our products and services, we may acquire other companies to add engineering talent or 
complementary products and technologies.  

Investment in Infrastructure. We intend to increase the capacity and enhance the capability and reliability of our 

infrastructure. Our infrastructure is critical to providing users, platform partners, advertisers and data partners access to 
our platform, particularly during major planned and unplanned events, such as elections, sporting events or natural 
disasters, when activity on our platform increases dramatically. As our user base and the activity on our platform grow, we 
expect that investments and expenses associated with our infrastructure will continue to grow. These investments and 
expenses include the expansion of our data center operations and related operating costs, additional servers and 
networking equipment to increase the capacity of our infrastructure and increased bandwidth costs.  

Products and Services Innovation. Our ability to increase the size and engagement of our user base, attract 
advertisers and increase our revenue will depend, in part, on our ability to improve existing products and services and to 
successfully develop or acquire new products and services. We plan to continue to make significant investments in 
research and development and, from time to time, we may acquire companies to enhance our products, services and 
technical capabilities.  

48 

 
 
Investment in Talent. We intend to invest in hiring and retaining talented employees to grow our business and 

increase our revenue. As of December 31, 2014, we had 3,638 full-time employees, an increase of over 900 full-time 
employees, or approximately 34%, from December 31, 2013. We expect to increase headcount for the foreseeable future 
as we continue to invest in our business. We have also made, and intend to continue to make, acquisitions that add 
engineers, designers, product managers and other personnel with specific technology expertise. In addition, we must 
retain our high-performing personnel in order to continue to develop, sell and market our products and services and 
manage our business.  

Seasonality. Advertising spending is traditionally strongest in the fourth quarter of each year. Historically, this 
seasonality in advertising spending has affected our quarterly results, with higher sequential advertising revenue growth 
from the third quarter to the fourth quarter compared to sequential advertising revenue growth from the fourth quarter to 
the subsequent first quarter. For example, our advertising revenue increased 45%, 43% and 35% between the third and 
fourth quarters of 2012, 2013 and 2014, respectively, while advertising revenue for the first quarter of 2013 and 2014 
increased 1% and 3% compared to the fourth quarter of 2012 and 2013, respectively. In addition, advertising revenue per 
timeline view increased 54% between the third and fourth quarter of 2013, while advertising revenue per timeline view 
decreased 3% between the fourth quarter of 2013 and the first quarter of 2014. The rapid growth in our business may 
have partially masked seasonality to date and the seasonal impacts may be more pronounced in the future.  

Stock-Based Compensation Expense. We have historically utilized, and intend to continue to utilize, various forms of 

stock-based awards in order to hire and retain talented employees. During the twelve months ended December 31, 2014 
and 2013, we recognized $631.6 million and $600.4 million of expense related to stock-based compensation, respectively. 
As of December 31, 2014, we had unrecognized stock-based compensation expense of approximately $1.45 billion 
related to outstanding equity awards, after giving effect to estimated forfeitures, which we expect to recognize over a 
weighted-average period of approximately three years. The stock-based compensation expenses related to our 
outstanding equity awards have a significant impact on our ability to generate net income on a GAAP basis in future 
periods. 

Results of Operations  

The following tables set forth our consolidated statement of operations data for each of the periods presented:  

Revenue 

2014

Year Ended December 31,
2013 
(in thousands) 

2012

Advertising services ............................................................... $ 1,255,688 $
Data licensing and other........................................................
Total Revenue ..................................................................

147,314
1,403,002

Costs and expenses (1) 

594,546     $ 
70,344       
664,890       

269,421
47,512
316,933

Cost of revenue .....................................................................
Research and development ...................................................
Sales and marketing ..............................................................
General and administrative ....................................................
Total costs and expenses .................................................
Loss from operations ........................................................
Interest income (expense), net ...................................................
Other income (expense), net ......................................................
Loss before income taxes ...........................................................
Provision (benefit) for income taxes ...........................................
Net loss ....................................................................................... $

446,309
691,543
614,110
189,906
1,941,868
(538,866)
(33,985)
(5,500)
(578,351)
(531)
(577,820) $

266,718       
593,992       
316,216       
123,795       
1,300,721       
(635,831 )     
(6,860 )     
(4,455 )     
(647,146 )     
(1,823 )     
(645,323 )   $ 

128,768
119,004
86,551
59,693
394,016
(77,083)
(2,486)
399
(79,170)
229
(79,399)

(1)  Costs and expenses include stock-based compensation expense as follows:  

Cost of revenue .......................................................................... $
Research and development........................................................
Sales and marketing ...................................................................
General and administrative.........................................................

50,536 $

360,726
157,263
63,072

Total ......................................................................................... $

631,597 $

50,942     $ 
379,913       
114,440       
55,072       
600,367     $ 

800
12,622
1,346
10,973
25,741

2014

Year Ended December 31,
2013 

2012

49 

 
 
  
  
  
    
  
       
       
  
  
  
  
  
 
 
 
 
   
The following table sets forth our consolidated statement of operations data for each of the periods presented as a 

percentage of revenue:  

Revenue 

Advertising services ..............................................................   
Data licensing and other .......................................................   
Total Revenue .................................................................   

Costs and expenses 

Cost of revenue ....................................................................   
Research and development ..................................................   
Sales and marketing .............................................................   
General and administrative ...................................................   
Total costs and expenses ................................................   
Loss from operations .......................................................   
Interest income (expense), net ..................................................   
Other income (expense), net .....................................................   
Loss before income taxes ..........................................................   
Provision (benefit) for income taxes ..........................................   
Net loss ......................................................................................   

Year Ended December 31, 

2014 

2013 

2012 

90%   
10  
100  

32  
49  
44  
14  
138  
(38) 
(2) 
(0) 
(41) 
(0) 
(41)%  

89 %      
11   
100   

40   
89   
48   
19   
196   
(96 ) 
(1 ) 
(1 ) 
(97 ) 
(0 ) 

(97 )%     

85%
15  
100  

41  
38  
27  
19  
124  
(24) 
(1) 
0  
(25) 
0  
(25)%

Years Ended December 31, 2014, 2013 and 2012  

Revenue  

We generate the substantial majority of our revenue from the sale of advertising services. We also generate revenue 

by licensing our data to third parties and providing mobile advertising exchange services.  

Advertising Services  

We generate substantially all of our advertising revenue by selling our Promoted Products. Currently, our Promoted 

Products consist of the following:  

• 

• 

• 

Promoted Tweets. Promoted Tweets, which are labeled as “promoted,” appear within a user’s timeline or 
search results just like an ordinary Tweet regardless of device, whether it be desktop or mobile. Using our 
proprietary algorithms and understanding of the interests of each user, we can deliver Promoted Tweets that 
are intended to be relevant to a particular user. We enable our advertisers to target an audience based on our 
users’ Interest Graphs. Our Promoted Tweets are pay-for-performance advertising that are priced through an 
auction. We recognize advertising revenue when a user engages with a Promoted Tweet.  

Promoted Accounts. Promoted Accounts, which are labeled as “promoted,” appear in the same format and 
place as accounts suggested by our Who to Follow recommendation engine, or in some cases, in Tweets in a 
user’s timeline. Promoted Accounts provide a way for our advertisers to grow a community of users who are 
interested in their business, products or services. Our Promoted Accounts are pay-for-performance advertising 
that are priced through an auction. We recognize advertising revenue when a user follows a Promoted 
Account.  

Promoted Trends. Promoted Trends, which are labeled as “promoted,” appear at the top of the list of trending 
topics for an entire day in a particular country or on a global basis. When a user clicks on a Promoted Trend, 
search results for that trend are shown in a timeline and a Promoted Tweet created by the advertiser is 
displayed to the user at the top of those search results. We sell our Promoted Trends on a fixed-fee-per-day 
basis. We feature one Promoted Trend per day per geography, and recognize advertising revenue from a 
Promoted Trend when it is displayed on our platform.  

50 

 
 
 
  
 
 
 
 
 
 
 
   
  
    
  
      
  
  
    
  
    
   
  
    
  
      
  
  
    
  
    
  
    
  
    
  
    
  
    
  
    
  
    
  
    
  
    
 
 
Data Licensing and Other 

We generate data licensing and other revenue by (i) offering “Gnip”-branded products and data licenses that allow 

our data partners to access, search and analyze historical and real-time data on our platform, which data consists of 
public Tweets and their content, and (ii) providing mobile advertising exchange services. Our data partners generally 
purchase licenses to access all or a portion of our data for a fixed period. We recognize data licensing revenue as the 
licensed data is made available to our data partners. In addition, we operate a mobile ad exchange and receive service 
fees from transactions completed on the exchange. Our mobile ad exchange enables buyers and sellers to purchase and 
sell advertising inventory and matches buyers and sellers. We have determined we are not the principal in the purchase 
and sale of advertising inventory in transactions between third party buyers and sellers on the exchange. Therefore we 
report revenue related to our ad exchange services on a net basis. 

2014

Year Ended December 31,
2013
(in thousands)

2012 

   2013 to 2014
    % Change

2012 to 2013
% Change

Advertising services ..................................................... $1,255,688 $ 594,546 $ 269,421       
47,512       
Data licensing and other ...............................................
Total Revenue ......................................................... $1,403,002 $ 664,890 $ 316,933       

147,314

70,344

111%
109%
111%

121%
48%
110%

2014 Compared to 2013. Revenue in 2014 increased by $738.1 million compared to 2013.  

In 2014, advertising revenue increased by 111% compared to 2013. The increase was primarily attributable to a 

17% increase in timeline views in 2014 compared to 2013, as well as an increase in demand from advertisers that drove 
an increase in advertising revenue per timeline view of 81% in 2014 compared to 2013. The increase in timeline views 
was driven by a 20% increase in average MAUs despite a 3% decrease in the user engagement levels of MAUs, as 
measured by timeline views per MAU, in 2014 compared to 2013. The increase in advertising revenue per timeline view 
was primarily driven by a 136% increase in ad engagements per timeline view, partially offset by a 23% decrease in 
average cost per ad engagement in 2014 compared to 2013. The increase in ad engagements per timeline view, 
combined with the increase in timeline views, resulted in a 175% increase in the number of ad engagements in 2014 
compared to 2013. Advertising revenue also benefited from sales of our Promoted Products on our mobile applications as 
well as from an increase in international revenue.  

In 2014, data licensing and other revenue increased by 109% compared to 2013. The majority of this increase was 

attributable to a full year of revenue generated from mobile advertising exchange services in 2014 as compared to the 
partial year of revenue generated in the prior year.  

2013 Compared to 2012. Revenue in 2013 increased by $348.0 million compared to 2012.  

In 2013, advertising revenue increased by 121% compared to 2012. The increase was primarily attributable to a 

55% increase in timeline views in 2013 compared to 2012, as well as an increase in demand from advertisers that drove 
an increase in advertising revenue per timeline view of 43% in 2013 compared to 2012. The increase in timeline views 
was driven by a 30% increase in average MAUs and a 19% increase in the user engagement levels of MAUs, as 
measured by timeline views per MAU, in 2013 compared to 2012. The increase in advertising revenue per timeline view 
was primarily driven by a 327% increase in ad engagements per timeline view, partially offset by a 67% decrease in 
average cost per ad engagement in 2013 compared to 2012. The increase in ad engagements per timeline view, 
combined with the increase in timeline views, resulted in a 561% increase in the number of ad engagements in 2013 
compared to 2012. Advertising revenue also benefited from sales of our Promoted Products on our mobile applications as 
well as from an increase in international revenue.  

In 2013, data licensing and other revenue increased by 48% compared to 2012, which was primarily attributable to a 

27% net increase in data licensing fees from existing data partners, and to a lesser extent, from an increase in licensing 
fees from new data partners.  

Cost of Revenue  

Year Ended December 31,

Cost of revenue ............................................................ $ 446,309
Cost of revenue as a percentage of revenue ...............

32%

2014

2013
(in thousands)
$ 266,718

40%

51 

   2013 to 

2014 

2012 

   % Change

2012 to 
2013 
% Change

$ 128,768        
41 %       

67%

107%

 
 
  
 
 
 
     
 
 
  
  
  
  
  
  
  
      
Cost of revenue consists primarily of data center costs related to our co-located facilities, which include lease and 

hosting costs, related support and maintenance costs and energy and bandwidth costs, as well as depreciation of our 
servers and networking equipment, and personnel-related costs, including salaries, benefits and stock-based 
compensation, for our operations teams. Cost of revenue also includes allocated facilities and other supporting overhead 
costs, amortization of acquired intangible assets and capitalized labor costs. Many of the elements of our cost of revenue 
are relatively fixed, and cannot be reduced in the near term to offset any decline in our revenue. 

2014 Compared to 2013. In 2014, cost of revenue increased by $179.6 million compared to 2013. The increase was 

primarily attributable to a $75.5 million increase in depreciation expense related to additional server and networking 
equipment and amortization of acquired intangible assets, a $60.2 million increase in networking, hosting and data center 
costs related to our co-located facilities, a $27.0 million increase in allocated facilities and other supporting overhead costs 
due to the continued expansion of our real estate footprint and increase in support functions, and a $16.9 million increase 
in personnel-related costs, mainly driven by an increase in average employee headcount.  

2013 Compared to 2012. In 2013, cost of revenue increased by $138.0 million compared to 2012. The increase was 

primarily attributable to a $64.6 million increase in personnel-related costs, mainly driven by an increase in average 
employee headcount and recognition of stock-based compensation expense triggered by our initial public offering, a 
$34.4 million increase in depreciation expense related to capital leases for additional server and networking equipment, a 
$28.0 million increase in allocated facilities and other supporting overhead costs due to the continued expansion of our real 
estate footprint and increase in support functions, and a $14.8 million increase in data center costs related to our co-located 
facilities.  These increases were partially offset by a $3.8 million decrease in amortization of acquired intangible assets.  

We plan to continue increasing the capacity and enhancing the capability and reliability of our infrastructure to 
support user growth and increased activity on our platform. We expect that cost of revenue will increase in absolute dollar 
amounts for the foreseeable future and vary in the near term from period to period as a percentage of revenue.   

Research and Development  

2014 

Year Ended December 31, 
2013 
(in thousands) 

2012 

   2013 to 2014   2012 to 2013  
    % Change 

  % Change 

Research and development ........................................  $ 691,543    $ 593,992    $ 119,004        
Research and development as a percentage of 
revenue ........................................................................ 

49%  

89%  

38 % 

16%  

399%

Research and development expenses consist primarily of personnel-related costs, including salaries, benefits and 

stock-based compensation, for our engineers and other employees engaged in the research and development of our 
products and services. In addition, research and development expenses include amortization of acquired intangible 
assets, allocated facilities and other supporting overhead costs. 

2014 Compared to 2013. In 2014, research and development expenses increased by $97.6 million compared to 
2013. The increase was primarily attributable to a $107.2 million increase in personnel-related costs, mainly driven by an 
increase in average employee headcount, and a $34.3 million increase in allocated facilities and other supporting 
overhead expenses due to the continued expansion of our real estate footprint and increase in support functions. These 
increases were partially offset by a $43.9 million increase in the capitalization of costs associated with developing 
software for internal use.  

2013 Compared to 2012. In 2013, research and development expenses increased by $475.0 million compared to 

2012. The increase was primarily attributable to a $466.7 million increase in personnel-related costs, mainly driven by an 
increase in average employee headcount and recognition of stock-based compensation expense triggered by our initial 
public offering, and a $32.3 million increase in allocated facilities and other supporting overhead expenses due to the 
continued expansion of our real estate footprint and increase in support functions. These increases were partially offset by 
a $24.0 million increase in the capitalization of costs associated with developing software for internal use.  

We plan to continue to hire employees for our engineering, product management and design teams to support our 

research and development efforts. We expect that research and development costs will increase in absolute dollar 
amounts for the foreseeable future and vary in the near term from period to period as a percentage of revenue.  

52 

 
 
 
  
 
 
 
 
 
 
     
 
 
 
 
 
 
      
       
  
 
  
Sales and Marketing  

2014

Sales and marketing .................................................... $ 614,110
Sales and marketing as a percentage of revenue ......

44%

$ 86,551        

94%

265%

48%

27 %       

Year Ended December 31,
2013
(in thousands)
$ 316,216

2012 

   2013 to 2014
    % Change

2012 to 2013
% Change

Sales and marketing expenses consist primarily of personnel-related costs, including salaries, commissions, benefits 

and stock-based compensation for our employees engaged in sales, sales support, business development and media, 
marketing, corporate communications and customer service functions. In addition, marketing and sales-related expenses 
also include market research, tradeshows, branding, marketing, public relations costs, amortization of acquired intangible 
assets, as well as allocated facilities and other supporting overhead costs. 

2014 Compared to 2013. In 2014, sales and marketing expenses increased by $297.9 million compared to 2013. 

The increase was primarily attributable to a $153.2 million increase in personnel-related costs, mainly driven by an 
increase in average employee headcount, a $98.8 million increase in marketing and sales-related expenses, a 
$38.1 million increase in allocated facilities and other supporting overhead expenses due to the continued expansion of 
our real estate footprint and increase in support functions, and a $7.8 million increase in amortization of acquired 
intangible assets.  

2013 Compared to 2012. In 2013, sales and marketing expenses increased by $229.7 million compared to 2012. 

The increase was primarily attributable to a $176.2 million increase in personnel-related costs, mainly driven by an 
increase in average employee headcount and recognition of stock-based compensation expense triggered by our initial 
public offering, a $32.9 million increase in marketing and sales-related expenses and a $20.6 million increase in allocated 
facilities and other supporting overhead expenses due to the continued expansion of our real estate footprint and increase 
in support functions.  

We plan to continue to invest in sales and marketing to expand internationally, grow our advertiser base and 
increase our brand awareness. We expect that sales and marketing expenses will increase in absolute dollar amounts for 
the foreseeable future and vary in the near term from period to period as a percentage of revenue.  

General and Administrative  

2014

General and administrative ......................................... $ 189,906
General and administrative as a percentage of 
revenue ........................................................................

14%

19%

19 % 

Year Ended December 31,
2013
(in thousands)
$ 123,795

2012 

   2013 to 2014
    % Change

2012 to 2013
% Change

$ 59,693        

53%

107%

General and administrative expenses consist primarily of personnel-related costs, including salaries, benefits and 

stock-based compensation, for our executive, finance, legal, information technology, human resources and other 
administrative employees. In addition, general and administrative expenses include fees and costs for professional 
services, including consulting, third-party legal and accounting services and facilities and other supporting overhead costs 
that are not allocated to other departments. 

2014 Compared to 2013. In 2014, general and administrative expense increased by $66.1 million compared to 2013. 
The increase was primarily attributable to a $51.3 million increase in personnel-related costs, mainly driven by an increase 
in average employee headcount and recognition of stock-based compensation expense, an increase of $16.3 million in 
fees and costs for professional services, partially offset by a $1.5 million decrease in unallocated facilities and supporting 
costs, driven by slower headcount growth in the general and administrative function relative to other functional areas.  

2013 Compared to 2012. In 2013, general and administrative expense increased by $64.1 million compared to 2012. 
The increase was primarily attributable to a $69.2 million increase in personnel-related costs, mainly driven by an increase 
in average employee headcount and recognition of stock-based compensation expense triggered by our initial public 
offering, an increase of $10.7 million in fees and costs for professional services, partially offset by a $15.8 million 
decrease in unallocated facilities and supporting costs, driven by slower headcount growth in the general and 
administrative function relative to other functional areas.  

53 

 
 
  
 
 
 
     
 
 
  
  
 
 
 
     
 
      
 
We plan to continue to expand our business both domestically and internationally, and expect to increase the size of 

our general and administrative function to help grow our business. We expect that we will continue to incur general and 
administrative expenses as a result of being a public company. We expect that general and administrative expenses will 
increase in absolute dollar amounts for the foreseeable future and vary in the near term from period to period as a 
percentage of revenue.  

Interest Income (Expense), Net  

2014 

Year Ended December 31, 
2013 
(In thousands) 

2012 

Interest income (expense), net ..............................................................  $

(33,985)    $ 

(6,860 )    $

(2,486)

Interest income (expense), net consists primarily of interest expense incurred in connection with the Notes and 

interest expense related to capital leases net of interest income resulting from our short term investments. 

2014 Compared to 2013. In 2014, interest expense, net, increased by $27.1 million compared to 2013. The increase 

was primarily attributable to the interest expense related to the amortization of the debt discount and accrued coupon 
interest expense of the Notes, which were issued in 2014. Interest expense totaled $35.9 million in 2014, comprised of 
$25.7 million of interest expense related to the Notes and the credit facility and $10.2 million related to capital leases of 
equipment, offset by interest income of $1.9 million, representing the interest earned primarily on our short term 
investments net of the related amortization of premium paid on such investments. We expect that interest expense will be 
higher in absolute dollars in future years because the Notes were issued in the third quarter of 2014 and therefore we only 
recorded a partial year of interest expense.  Historically, we incurred interest expense primarily from capital leases of 
equipment.  

2013 Compared to 2012. In 2013, interest expense, net, increased by $4.4 million compared to 2012. The increase 

was primarily attributable to the increase in equipment purchases through capital leases. 

Other Income (Expense), Net  

2014 

Year Ended December 31, 
2013 
(In thousands) 

2012 

Other income (expense), net ........................................................................   $

(5,500)   $ 

(4,455)   $

399 

Other income (expense), net, consists primarily of unrealized foreign exchange gains and losses due to re-
measurement of monetary assets and liabilities denominated in non-functional currencies as well as realized foreign 
exchange gains and losses on foreign exchange transactions. We expect our foreign exchange gains and losses will vary 
depending upon movements in the underlying exchange rates. 

2014 Compared to 2013. In 2014, other expense, net, increased by $1.0 million compared to 2013. The increase 

was attributable to unfavorable foreign currency exchange impact from the re-measurement of our asset and liability 
balances denominated in currencies other than the functional currency. 

2013 Compared to 2012. In 2013, other expense, net, increased by $4.9 million compared to other income, net of 

$0.4 million in 2012. The decrease was attributable to unfavorable foreign currency exchange impact from the re-
measurement of our asset and liability balances denominated in currencies other than the functional currency. 

Provision (Benefit) for Income Taxes  

2014 

Provision (benefit) for income taxes ......................................................  $

54 

Year Ended December 31, 
2013 
. 
(1,823 )    $

(531)    $ 

2012 

229

 
 
  
 
 
 
 
 
 
 
  
 
 
   
 
  
 
 
 
 
 
  
 
 
 
Provision (benefit) for income taxes consists of federal and state income taxes in the United States and income 
taxes in certain foreign jurisdictions, and deferred income taxes and changes in related valuation allowance reflecting the 
net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting 
purposes and the amounts used for income tax purposes. 

2014 Compared to 2013. Our benefit for income taxes in 2014 decreased by $1.3 million compared to a benefit of 

$1.8 million in 2013. The decrease was primarily due to the increased income tax expense in foreign jurisdictions, partially 
offset by the increased income tax benefit arising from acquisitions. 

2013 Compared to 2012. Our benefit for income taxes in 2013 increased by $2.0 million compared to a provision of 

$0.2 million in 2012. The increase was primarily due to the increased income tax benefit arising from acquisitions, partially 
offset by the increase in income tax expenses in foreign and state jurisdictions. 

As of December 31, 2014, we had $2.60 billion of federal and $1.00 billion of state net operating loss carryforwards 
available to reduce future taxable income. These net operating loss carryforwards will begin to expire for federal income 
tax purposes and state income tax purposes in 2027 and 2015, respectively. We also have research credit carryforwards 
of $175.9 million and $142.0 million for federal and state income tax purposes, respectively. The federal research credit 
carryforward will begin to expire in 2027. The state research credit carryforward has no expiration date. Additionally, we 
have California Enterprise Zone credit carryforwards of $15.9 million which will begin to expire in 2023. Utilization of the 
net operating loss carryforwards and research credit carryforwards may be subject to an annual limitation due to the 
ownership change limitations provided by the Internal Revenue Code of 1986, as amended, and similar state provisions. 
Any annual limitation may result in the expiration of net operating losses and research credits before utilization. 

Quarterly Results of Operations  

The following table sets forth our unaudited consolidated statement of operations data for each of the eight quarters 
in the period ended December 31, 2014. The unaudited quarterly statement of operations data set forth below have been 
prepared on a basis consistent with our audited annual consolidated financial statements in this Annual Report on Form 
10-K and include, in our opinion, all normal recurring adjustments necessary for a fair statement of the financial 
information contained in those statements. Our historical results are not necessarily indicative of the results that may be 
expected in the future. The following quarterly financial data should be read in conjunction with our audited consolidated 
financial statements and the related notes included elsewhere in this Annual Report on Form 10-K.  

Dec. 31,        Sep. 30,  

2014 

      2014 

  Jun. 30,   
2014 

Three Months Ended 
  Dec. 31,  
2013 

  Mar. 31,   
2014 

   Sep. 30,        Jun. 30,   
   2013 

      2013 

  Mar. 31, 

2013 

(Unaudited, in thousands, except per share data) 

Consolidated Statement of Operations 
Data: 
Revenue .....................................................       

Advertising services .............................  $  432,001       $  320,196     $ 277,440     $ 226,051    $ 219,677     $  153,437       $  120,972     $
22,998        15,143          18,320      
Data licensing and other ......................     47,077          41,070      
Total revenue .................................     479,078          361,266       312,166       250,492      242,675        168,580          139,292      

34,726      

24,441     

Costs and expenses(1) 

Cost of revenue ....................................     136,613          124,166       100,027      
85,503      112,651        62,239          50,573      
Research and development .................     181,715          183,342       177,095       149,391      394,848        87,307          64,263      
Sales and marketing ............................     203,599          164,015       140,261       106,235      177,305        61,214          45,258      
67,547        21,152          18,114      
General and administrative ..................     55,304          51,174      
Total costs and expenses ..............     577,231          522,697       462,077       379,863      752,351        231,912          178,208      
(38,916 )    
Loss from operations......................    
(1,513 )    
Interest income (expense), net ...................    
(1,019 )    
Other income (expense), net ......................    
(41,448 )    
Provision (benefit) for income taxes ...........    
777     
Net loss ......................................................  $ (125,352 )    $ (175,464 )   $ (144,642 )   $ (132,362)   $ (511,471 )   $  (64,601 )    $  (42,225 )   $

(98,153 )       (161,431 )     (149,911 )     (129,371)     (509,676 )     
(2,387 )     
(2,110 )    
(23,513 )      
(2,725 )     
1,780      
1         
Loss before income taxes ..............     (121,665 )       (175,305 )     (150,241 )     (131,140)     (514,788 )     
(3,317 )     

(63,332 )      
(1,727 )      
818         
(64,241 )      
360         

(5,795 )    
(8,079 )    

(2,567)    
798     

44,694      

38,734     

(5,599 )    

3,687         

1,222     

159     

100,460  
13,883  
114,343  

41,255  
47,574  
32,439  
16,982  
138,250  
(23,907 )
(1,233 )
(1,529 )
(26,669 )
357 
(27,026 )

Net loss per share attributable to common 
stockholders: 

Basic and diluted ............................  $ 

(0.20 )    $ 

(0.29 )   $

(0.24 )   $

(0.23)   $

(1.41 )   $ 

(0.48 )    $ 

(0.32 )   $

(0.21 )

Other Financial Information: 
Adjusted EBITDA(2) .....................................  $  141,490       $  68,326     $ 54,131     $ 36,949    $ 44,745     $ 
Non-GAAP net income (loss)(3) ..................  $  79,320       $ 

6,972     $ 14,596     $

183    $

9,647     $
9,293       $ 
9,774     $  (17,216 )    $  (16,364 )   $

11,745  
(10,524 )

55 

 
 
  
  
 
  
 
  
 
 
 
 
 
 
 
 
 
 
  
 
     
           
        
        
        
         
           
        
 
           
        
        
        
         
           
        
 
     
           
        
        
        
         
           
        
 
     
           
        
        
        
         
           
        
 
     
           
        
        
        
         
           
        
 
 
(1)  Costs and expenses include stock-based compensation expense as follows:  

Dec. 31,      Sep. 30,

2014 

2014

Jun. 30,
2014

Three Months Ended
Dec. 31,
Mar. 31,
2013
2014

Sep. 30,      Jun. 30,

2013 

2013

Mar. 31,
2013

Cost of revenue ..........................................  $  13,240       $  13,596
Research and development .......................     95,942          93,973
Sales and marketing ...................................     49,031          42,884
General and administrative ........................     19,002          19,149

$ 13,869
92,493
37,547
14,502

(Unaudited, in thousands)
$

9,831
78,318
27,801
10,419

$ 45,927
326,536
104,084
44,650

3,060       $ 

$ 
1,471
   29,180          15,772
2,549
2,854

5,742         
5,620         

$

484
8,425
2,065
1,948

Total stock-based compensation 
expense ................................................  $  177,215       $  169,602     $ 158,411     $ 126,369    $ 521,197     $  43,602       $  22,646     $

12,922  

(2) 

The following table presents a reconciliation of net loss to Adjusted EBITDA for each of the periods indicated:  

Dec. 31,      Sep. 30,

2014 

2014

Jun. 30,
2014

Three Months Ended
Dec. 31,
Mar. 31,
2013
2014

(Unaudited, in thousands)

Sep. 30,      Jun. 30,

2013 

2013

Mar. 31,
2013

Reconciliation of Net Loss to Adjusted 
EBITDA: 
Net loss ......................................................  $ (125,352 )    $ (175,464 ) $ (144,642 ) $ (132,362) $ (511,471 ) $  (64,601 )    $  (42,225 ) $

Stock-based compensation expense ...     177,215          169,602
Depreciation and amortization 
expense ................................................     62,428          60,155      
Interest and other expense (income) ...     23,512          13,874
159
Provision (benefit) for income taxes .....    
Adjusted EBITDA .......................................  $  141,490       $  68,326

3,687         

158,411

126,369

521,197

   43,602          22,646

45,631      
330
(5,599 )
$ 54,131

1,769
1,222
$ 36,949

39,951     

33,224        29,023          25,917      

5,112
(3,317 )
$ 44,745

$ 

909         
360         
9,293       $ 

2,532
777
9,647

$

(27,026 )
12,922

22,730  
2,762
357
11,745

(3) 

The following table presents a reconciliation of net loss to non-GAAP net income (loss) for each of the periods 
indicated:  

Dec. 31,      Sep. 30,

2014 

2014

Jun. 30,
2014

Three Months Ended
Dec. 31,
Mar. 31,
2013
2014

(Unaudited, in thousands)

Sep. 30,      Jun. 30,

2013 

2013

Mar. 31,
2013

Reconciliation of Net Loss to Non-
GAAP Net Income (Loss): 
Net loss ......................................................  $ (125,352 )    $ (175,464 ) $ (144,642 ) $ (132,362) $ (511,471 ) $  (64,601 )    $  (42,225 ) $

158,411

126,369

521,197

   43,602          22,646

(27,026 )
12,922

Stock-based compensation expense ...     177,215          169,602
Amortization of acquired intangible 
assets ...................................................     10,419          11,869      
Non-cash interest expense related to 
convertible notes ..................................     16,412         
Income tax effects related to 
acquisitions ..........................................    

626         
Non-GAAP net income (loss) .....................  $  79,320       $ 

(1,446 )    
6,972

2,411      

8,099      

6,176     

5,569       

3,783         

3,302      

3,876  

—     

—     

—      

—         

—     

— 

(7,272 )    
$

$ 14,596

—     
$

183

(5,521 )     
9,774

—         

(87 )    
$  (17,216 )    $  (16,364 ) $

(296 )
(10,524 )

Quarterly Trends  
Revenue  

Spending by advertisers is traditionally strongest in the fourth quarter of each year. Historically, this seasonality in 

advertising spending has affected our quarterly results with higher sequential advertising revenue growth from the third to 
the fourth quarter compared to sequential advertising revenue growth from the fourth quarter to the subsequent first 
quarter. For example, our advertising revenue increased 45%, 43% and 35% between the third and fourth quarters of 
2012, 2013 and 2014, respectively, while advertising revenue for the first quarter of 2013 and 2014 increased 1% and 3% 
compared to the fourth quarter of 2012 and 2013, respectively.  

Cost of Revenue and Operating Expenses  

Cost of revenue, excluding the impact of stock-based compensation expense, increased in every quarter presented 

primarily due to the continued expansion of our co-located data center facilities and an increase in average employee 
headcount.  

56 

 
 
  
 
 
 
   
   
 
  
  
 
 
  
 
 
 
   
   
 
     
           
     
           
  
  
 
  
 
 
 
   
   
 
     
           
     
           
Operating expense, excluding the impact of stock-based compensation expense, increased in every quarter 
presented primarily due to the continued expansion of our facilities and an increase in average employee headcount. In 
addition, we experienced a varied level of capitalization of research and development expense as a result of the 
development of software programs and websites for internal use, due to the timing and extent of projects eligible for 
capitalization.  

Cost of revenue and operating expenses include significant amounts of stock-based compensation expense. Prior to 
the closing of our initial public offering in November 2013, we had not recognized any stock-based compensation expense 
for the Pre-2013 RSUs, because the performance condition had not been satisfied. Upon completion of our initial public 
offering, we began recording the stock-based compensation expense related to Pre-2013 RSUs, because the satisfaction 
of the performance condition became probable. During the year ended December 31, 2013, the amount of stock-based 
compensation expense recorded in relation to Pre-2013 RSUs totaled approximately $433.5 million. This amount is 
comprised of $405.9 million of expense accumulated until the effective date of our initial public offering for awards vested 
and $27.6 million of subsequent recognition of expense during the year as additional Pre-2013 RSUs continue to vest.   

Credit Facility  

In October 2013, we entered into a revolving credit agreement with certain lenders which provides for a $1.0 billion 

revolving unsecured credit facility maturing on October 22, 2018. Loans under the credit facility bear interest, at our 
option, at (i) a base rate based on the highest of the prime rate, the federal funds rate plus 0.50% and an adjusted LIBOR 
rate for a one-month interest period plus 1.00%, in each case plus a margin ranging from 0.00% to 0.75% or (ii) an 
adjusted LIBOR rate plus a margin ranging from 1.00% to 1.75%. This margin is determined based on our total leverage 
ratio for the preceding four fiscal quarter period. We are also obligated to pay other customary fees for a credit facility of 
this size and type, including an upfront fee and an unused commitment fee. Our obligations under the credit facility are 
guaranteed by one of our wholly-owned subsidiaries. In addition, the credit facility contains restrictions on payments 
including cash payment of dividends.  

The revolving credit agreement was amended in September 2014 to increase the amount of indebtedness that we 

may incur and increase the amount of restricted payments that we may make. This amendment to the revolving credit 
agreement also provides that if our total leverage ratio exceeds 2.5:1.0 and if the amount outstanding under the credit 
facility exceeds $500.0 million, or 50% of the amount that may be borrowed under the credit facility, the credit facility will 
become secured by substantially all of our and certain of our subsidiaries’ assets, subject to limited exceptions. As of 
December 31, 2014, no amounts were drawn under the credit facility.  

Liquidity and Capital Resources  

Consolidated Statements of Cash Flows Data: 
Net loss ............................................................................    $ (577,820)   $ (645,323 )    $ 
Net cash provided by (used in) operating activities .........     
1,398        
Net cash provided by (used in) investing activities ..........      (1,097,272)     (1,306,066 )      
Net cash provided by (used in) financing activities .........      1,691,722       1,942,176        

81,796      

(79,399)
(27,935)
49,443 
(37,124)

2014 

Year Ended December 31, 
2013 
(In thousands) 

2012 

Our principal sources of liquidity are our cash, cash equivalents, and short-term investments in marketable 

securities. Our cash equivalents and marketable securities are invested in short-term interest-bearing obligations, 
including government and investment-grade debt securities and money market funds. In 2014, we also received net 
proceeds of approximately $1.86 billion from the issuance of the Notes, after deducting the initial purchasers’ discount and 
debt issuance costs. Concurrently with the sales of the Notes, we entered into privately-negotiated convertible note hedge 
transactions with respect to our common stock for which we paid approximately $407.2 million and sold warrants for which 
we received approximately $289.3 million.  We expect that we will incur additional cash interest expense for the term of 
the Notes. See section entitled “Contractual Obligations” below for further information regarding interest expense related 
to the Notes. 

57 

 
 
  
 
 
 
 
 
   
 
 
       
         
         
 
 
  
As of December 31, 2014, we had $3.62 billion of cash, cash equivalents and short-term investments in marketable 
securities, of which $198.6 million was held by our foreign subsidiaries. If these funds are needed for our operations in the 
U.S., we would be required to accrue and pay U.S. taxes to repatriate certain of these funds. However, our intent is to 
permanently reinvest these funds outside of the U.S. and our current plans do not demonstrate a need to repatriate them 
to fund our U.S. operations. In addition, we have a revolving unsecured credit facility available to borrow up to $1.0 billion. 
We believe that our existing cash, cash equivalents and short-term investment balance, and our credit facility, together 
with cash generated from operations will be sufficient to meet our working capital and capital expenditure requirements for 
at least the next 12 months.  

Operating Activities  

Cash provided by (used in) operating activities consisted of net loss adjusted for certain non-cash items including 

depreciation and amortization, stock-based compensation, amortization of discount on our Notes, deferred income taxes 
and non-cash expense related to acquisitions, as well as the effect of changes in working capital and other activities.  

Cash provided by operating activities in 2014 was $81.8 million, an increase in cash inflow of $80.4 million 
compared to 2013. Cash provided by operating activities was driven by a net loss of $577.8 million, as adjusted for the 
exclusion of non-cash expenses totaling $861.6 million, of which $631.6 million was related to stock-based compensation 
expense, and the effect of changes in working capital and other carrying balances that resulted in cash outflow of 
$202.0 million.  

Cash provided by operating activities in 2013 was $1.4 million, an increase in cash inflow of $29.3 million compared 
to 2012. Cash provided by operating activities was driven by a net loss of $645.3 million, as adjusted for the exclusion of 
non-cash expenses totaling $708.1 million, of which $600.4 million was related to stock-based compensation expense, 
and the effect of changes in working capital and other carrying balances that resulted in cash outflow of $61.4 million.  

Cash used in operating activities in 2012 was $27.9 million, a decrease in cash outflow of $42.7 million compared to 
2011. Cash used in operating activities was driven by a net loss of $79.4 million, as adjusted for the exclusion of non-cash 
expenses totaling $104.8 million and the effect of changes in working capital and other carrying balances that resulted in 
cash outflow of $53.3 million.  

Investing Activities  

Our primary investing activities consisted of purchases of property and equipment, particularly purchases of servers 

and networking equipment, purchases and disposal of marketable securities, leasehold improvements for our facilities and 
acquisitions of businesses and purchases of intangible assets.  

Cash used in investing activities in 2014 was $1.10 billion, a decrease in cash outflow of $208.8 million compared to 

2013. The decrease in cash outflow was due to an increase in the proceeds from maturities and sales of marketable 
securities of $1.82 billion offset by an increase in the purchases of marketable securities of $1.36 billion and a 
$247.2 million increase in expenditures on other investing activities, including business combinations, purchases of 
intangible assets, purchases of property and equipment and restricted cash. 

Cash used in investing activities in 2013 was $1.31 billion, an increase in cash outflow of $1.36 billion compared to 

2012. The increase in cash outflow was due to an increase in the purchases of marketable securities of $1.03 billion, a 
decrease in the proceeds from maturities and sales of marketable securities of $249.3 million and a $75.4 million increase 
in expenditure on other investing activities, including business combinations, purchases of intangible assets, purchases of 
property and equipment and restricted cash.  

Cash provided by investing activities in 2012 was $49.4 million, an increase in cash inflow of $374.3 million 

compared to 2011. The increase in cash inflow was due to the increase in sales and maturities of marketable securities of 
$449.5 million and a reduction in use of cash as acquisition consideration of $17.4 million. Such increases in cash inflow 
were partially offset by increased purchases of marketable securities of $55.0 million and property and equipment of 
$39.1 million.  

We anticipate making capital expenditures in 2015 of approximately $500 million to $650 million, a portion of which 

we may finance through capital leases, as we continue to expand our co-located data centers and our office facilities.  

58 

 
 
 
Financing Activities  

Our primary financing activities consisted of issuances of securities (including the Notes, common stock issued in 

connection with our initial public offering and, in the past, private sales of convertible preferred stock), capital lease 
financing and stock option exercises by employees and other service providers. 

Cash provided by financing activities in 2014 was $1.69 billion, a decrease of $250.5 million in cash inflow compared 

to 2013. The decrease in cash inflow was primarily due to net proceeds of $1.86 billion from the issuance of convertible 
senior notes net of initial issuance discount reduced by the net cash outflow of $117.9 million from the purchase of 
convertible note hedges and sale of warrants closed in connection with the issuance of Notes in 2014 compared to net 
proceeds of $2.02 billion from issuance of common stock in connection with our initial public offering in 2013. In addition, 
we recorded an increase of $62.4 million in proceeds from option exercises and issuance of common stock under our 
employee stock purchase plan, partially offset by a $32.7 million increase in repayments of capital lease obligations. 

Cash provided by financing activities in 2013 was $1.94 billion, an increase of $1.98 billion in cash inflow compared 
to 2012. The increase in cash inflow was primarily due to net proceeds of $2.02 billion from issuance of common stock in 
connection with our initial public offering and a slight increase in proceeds from option exercises, partially offset by an 
increase in repayments of capital lease obligations and payroll tax payments related to net share settlement of equity 
awards. 

Cash used in financing activities in 2012 was $37.1 million, an increase in cash outflow of $517.3 million compared 

to 2011. The increase in cash outflow was due to the absence of equity financing transactions, an increase in repayments 
of capital lease obligations and a decrease in proceeds from option exercises. 

Off Balance Sheet Arrangements  

We do not have any off-balance sheet arrangements and did not have any such arrangements in 2014, 2013 or 

2012.  

Contractual Obligations  

Our principal commitments consist of obligations under the Notes (including principal and coupon interest), capital 

and operating leases for equipment, office space and co-located data center facilities. The following table summarizes our 
commitments to settle contractual obligations in cash as of December 31, 2014.  

Total 

Less than 
1 year 

Payments Due by Period 

1-3 years 
(In thousands) 

3-5 years 

More than 
5 years 

2019 Notes ................................................. $ 
946,674    $
2021 Notes .................................................    1,020,739     
918,479     
Operating lease obligations ........................   
244,506     
Capital lease obligations ............................   
Total contractual obligations .................. $  3,130,398    $

2,318    $
9,446     
110,221     
119,771     
241,756    $

939,675    $
4,681    $ 
19,080     
19,106      
237,599     
274,288      
120,576      
4,159     
418,651    $  1,200,513    $

- 
973,107 
296,371 
- 
1,269,478 

As of December 31, 2014, we had liabilities of $0.7 million related to uncertain tax positions. Due to uncertainties in 
the timing of potential tax audits, the timing of the resolution of these positions is uncertain and we are unable to make a 
reasonably reliable estimate of the timing of payments in individual years beyond 12 months. As a result, this amount is 
not included in the above table. We also have $38.9 million of non-cancelable contractual commitments as of 
December 31, 2014, primarily related to our bandwidth and other services arrangements. These commitments are 
generally due within one to two years.  

59 

 
 
  
  
  
  
 
 
     
  
  
   
  
 
 
Critical Accounting Policies and Estimates  

We prepare our consolidated financial statements in accordance with generally accepted accounting principles in the 

United States, or U.S. GAAP. In doing so, we have to make estimates and assumptions that affect our reported amounts 
of assets, liabilities, revenue and expenses, as well as related disclosure of contingent assets and liabilities. To the extent 
that there are material differences between these estimates and actual results, our financial condition or operating results 
would be affected. We base our estimates on past experience and other assumptions that we believe are reasonable 
under the circumstances, and we evaluate these estimates on an ongoing basis. We refer to accounting estimates of this 
type as critical accounting policies and estimates, which we discuss further below.  

Revenue Recognition  

We generate the substantial majority of our revenue from the sale of advertising services with the balance coming 

from data licensing and other arrangements. We generate our advertising revenue primarily from the sale of our three 
Promoted Products: (i) Promoted Tweets, (ii) Promoted Accounts and (iii) Promoted Trends. Promoted Tweets and 
Promoted Accounts are pay-for-performance advertising products priced through an auction. Promoted Trends are 
featured by geography and offered on a fixed-fee-per-day basis. Advertisers are obligated to pay when a user engages 
with a Promoted Tweet or follows a Promoted Account or when a Promoted Trend is displayed. Users engage with 
Promoted Tweets by expanding, retweeting, favoriting or replying to Promoted Tweets or following the account that tweets 
a Promoted Tweet. These products may be sold in combination as a multiple element arrangement or separately on a 
stand-alone basis. Fees for these advertising services are recognized in the period when advertising is delivered as 
evidenced by a user engaging with a Promoted Tweet, as captured by a click, following a Promoted Account or through 
the display of a Promoted Trend on our platform. Data licensing revenue is generated based on monthly service fees 
charged to the data partners over the period in which Twitter data and data products are made available to them. Other 
revenue is primarily generated from service fees from transactions completed on our mobile ad exchange. Our mobile ad 
exchange enables buyers and sellers to purchase and sell advertising inventory and matches buyers and sellers. We 
have determined we are not the principal in the purchase and sale of advertising inventory in transactions between third 
party buyers and sellers on the exchange. Therefore, we report revenue related to our ad exchange services on a net 
basis.  

Revenue is recognized only when (1) persuasive evidence of an arrangement exists; (2) the price is fixed or 
determinable; (3) the service is performed; and (4) collectability of the related fee is reasonably assured. While the 
majority of our revenue transactions are based on standard business terms and conditions, we also enter into non-
standard sales agreements with advertisers and data partners that sometimes involve multiple elements.  

For arrangements involving multiple deliverables, judgment is required to determine the appropriate accounting, 

including developing an estimate of the stand-alone selling price of each deliverable. When neither vendor-specific 
objective evidence nor third-party evidence of selling price exists, we use our best estimate of selling price (BESP) to 
allocate the arrangement consideration on a relative selling price basis to each deliverable. The objective of BESP is to 
determine the selling price of each deliverable when it is sold to advertisers on a stand-alone basis. In determining 
BESPs, we take into consideration various factors, including, but not limited to, prices we charge for similar offerings, 
sales volume, geographies, pricing strategies and market conditions. Multiple deliverable arrangements primarily consist 
of combinations of our pay-for-performance products, Promoted Tweets and Promoted Accounts, which are priced 
through an auction, and Promoted Trends, which are priced on a fixed-fee-per day per geography basis. For 
arrangements that include a combination of these products, we develop an estimate of the selling price for these products 
in order to allocate any potential discount to all advertising products in the arrangement. The estimate of selling price for 
pay-for-performance products is determined based on the winning bid price; the estimate of selling price for Promoted 
Trends is based on Promoted Trends sold on a stand-alone basis and/or separately priced in a bundled arrangement by 
reference to a list price by geography which is approved periodically. We believe the use of BESP results in revenue 
recognition in a manner consistent with the underlying economics of the transaction and allocates the arrangement 
consideration on a relative selling price basis to each deliverable.  

Income Taxes  

We are subject to income taxes in the United States and several foreign jurisdictions. Significant judgment is 

required in evaluating our uncertain tax positions and determining our provision for income taxes.  

60 

 
 
 
Although we believe we have adequately reserved for our uncertain tax positions, no assurance can be given that 

the final outcome of these matters will not be different. We adjust these reserves in light of changing facts and 
circumstances, such as the closing of a tax audit. To the extent that the final outcome of these matters is different than the 
amounts recorded, such differences may impact the provision for income taxes in the period in which such determination 
is made. The provision for income taxes includes the impact of reserve provisions and changes to reserves that are 
considered appropriate, as well as any related interest or penalties.  

Our effective tax rates have differed from the statutory rate primarily due to the tax impact of foreign operations, 
state taxes, certain benefits realized in recording the tax effects of business combinations, and the recording of U.S. 
valuation allowance. Our future provision for income taxes could be adversely affected by earnings being lower than 
anticipated in countries where we have lower statutory rates and higher than anticipated in countries where we have 
higher statutory tax rates, changes in the valuation of our deferred tax assets or liabilities, or changes in tax laws, 
regulations or accounting principles. In addition, we are subject to examination of our income tax returns by tax authorities 
in the United States and foreign jurisdictions. We regularly assess the likelihood of adverse outcomes resulting from these 
examinations to determine the adequacy of our provision for income taxes.  

Stock-Based Compensation  

We account for stock-based compensation expense under the fair value recognition and measurement provisions in 

accordance with the applicable accounting standards which require all stock-based awards granted to employees to be 
measured based on the grant-date fair value and amortized over the respective period during which the employee is 
required to provide service.  

The fair value of stock options granted and stock purchase rights provided under the employee stock purchase plan 
is estimated based on the Black-Scholes option pricing model which requires inputs of judgmental assumptions including 
the expected term of the award and stock price volatility. If any of the assumptions used in the fair value determination 
change significantly, stock-based compensation expense may differ materially.  

We have historically granted Pre-2013 RSUs which had both service and performance-based vesting conditions. As 

the satisfaction of the performance condition became probable upon completion of our initial public offering in November 
2013, we started recording stock-based compensation expense on an accelerated basis for the awards for which the 
service condition had been satisfied. 

We amortize the expense associated with all other stock-based awards which are only subject to service conditions, 

including Post-2013 RSUs, on a straight-line basis. 

We are required to recognize stock-based compensation expense for only those shares that we expect to vest. We 

estimate the forfeiture rate based on historical forfeitures of our stock-based awards and our expectations regarding future 
pre-vesting termination behavior of our employees. While the forfeiture rate used represents our best estimate, this 
estimate involves inherent uncertainties. To the extent the actual forfeitures differ from our estimates, stock-based 
compensation expense will be adjusted accordingly and may have a significant effect on our stock-based compensation 
expense. 

Business Combinations  

We account for acquisitions of entities that include inputs and processes and have the ability to create outputs as 
business combinations. The purchase price of the acquisition is allocated to the tangible and intangible assets acquired and 
liabilities assumed based on their estimated fair values at the acquisition dates. The excess of the purchase price over those 
fair values is recorded as goodwill. During the measurement period, which may be up to one year from the acquisition date, 
we may record adjustments to the assets acquired and liabilities assumed with the corresponding offset to goodwill. Upon 
the conclusion of the measurement period or final determination of the values of assets acquired or liabilities assumed, 
whichever comes first, any subsequent adjustments are recorded to the consolidated statements of operations. 

Accounting for business combinations requires our management to make significant estimates and assumptions at 

the acquisition date, including estimated fair value of acquired intangible assets, estimated fair value of stock awards 
assumed from the acquirees that are included in the purchase price, estimated income tax assets and liabilities assumed 
from the acquirees, and determination of the fair value of contractual obligations, where applicable. The estimates of fair 
value require management to also make estimates of, among other things, future expected cash flows, discount rates or 
expected costs to reproduce an asset. Although we believe the assumptions and estimates we have made in the past 
have been reasonable and appropriate, these estimates are based on historical experience and information obtained from 
the management of the acquired companies and are inherently uncertain. 

61 

 
 
 
 
Item 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK  

We have operations both within the United States and internationally, and we are exposed to market risks in the 

ordinary course of our business. These risks include primarily interest rate and foreign exchange risks.  

Interest Rate Fluctuation Risk  

Our investment portfolio mainly consists of short-term interest-bearing obligations, including government and 

investment-grade debt securities and money market funds. These securities are classified as available-for-sale and, 
consequently, are recorded in the consolidated balance sheets at fair value with unrealized gains or losses reported as a 
separate component of accumulated other comprehensive income (loss), net of tax. Our investment policy and strategy is 
focused on the preservation of capital and supporting our liquidity requirements. We do not enter into investments for 
trading or speculative purposes.  

A rise in interest rates could have a material adverse impact on the fair value of our investment portfolio. Based on 

our investment portfolio balance as of December 31, 2014, a hypothetical increase in interest rates of 100 basis points 
would result in a decrease of approximately $8.7 million in the fair value of our available-for-sale securities. We currently 
do not hedge these interest rate exposures.  

In 2014, we issued Notes with aggregate principal amount of $1.89 billion. We carry the Notes at face value less 

amortized discount on the consolidated balance sheet. Since the Notes bear interest at fixed rates, we have no financial 
statement risk associated with changes in interest rates. However, the fair value of the Notes changes primarily when the 
market price of our stock fluctuates or interest rates change. 

Foreign Currency Exchange Risk  
Transaction Exposure  

We transact business in various foreign currencies and have international revenue, as well as costs denominated in 

foreign currencies, primarily the Euro, British Pound and Japanese Yen. This exposes us to the risk of fluctuations in 
foreign currency exchange rates. Accordingly, changes in exchange rates, and in particular a strengthening of the U.S. 
dollar, would negatively affect our revenue and other operating results as expressed in U.S. dollars.  

We have experienced and will continue to experience fluctuations in our net loss as a result of transaction gains or 
losses related to revaluing and ultimately settling certain asset and liability balances that are denominated in currencies 
other than the functional currency of the entities in which they are recorded. Net realized and unrealized foreign currency 
losses were $7.2 million in 2014. Foreign currency gains and losses were not significant in 2013 or 2012. At this time we 
do not, but we may in the future, enter into derivatives or other financial instruments in an attempt to hedge our foreign 
currency exchange risk. It is difficult to predict the impact hedging activities would have on our results of operations.  

Translation Exposure  

We are also exposed to foreign exchange rate fluctuations as we convert the financial statements of our foreign 

subsidiaries into U.S. dollars in consolidation. If there is a change in foreign currency exchange rates, the conversion of 
our foreign subsidiaries’ financial statements into U.S. dollars would result in a gain or loss recorded as a component of 
accumulated other comprehensive loss which is part of stockholders’ equity.  

Revenue and related expenses generated from our international subsidiaries are generally denominated in the 
currencies of the local countries. Primary currencies include the Euro, British Pound and Japanese Yen. The statements 
of operations of our international operations are translated into U.S. dollars at exchange rates indicative of market rates 
during each applicable period. To the extent the U.S. dollar strengthens against foreign currencies, the translation of these 
foreign currency-denominated transactions would result in reduced consolidated revenue and operating expenses. 
Conversely, our consolidated revenue and operating expenses would increase if the U.S. dollar weakens against foreign 
currencies.  

62 

 
 
 
 
 
Item 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA  

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS  

Report of Independent Registered Public Accounting Firm ...........................................................................................   
Consolidated Balance Sheets ........................................................................................................................................   
Consolidated Statements of Operations ........................................................................................................................   
Consolidated Statements of Comprehensive Loss ........................................................................................................   
Consolidated Statements of Redeemable Convertible Preferred Stock, Convertible Preferred Stock and 

   Page
64
65
66
67

Stockholders’ Equity (Deficit) .....................................................................................................................................   
Consolidated Statements of Cash Flows .......................................................................................................................   
Notes to Consolidated Financial Statements .................................................................................................................   

68
69
70

The supplementary financial information required by this Item 8 is included in Item 7 under the caption “Quarterly 
Results of Operations.” 

63 

 
 
 
 
  
 
 
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM  

To the Board of Directors and Stockholders of  
Twitter, Inc.  

In our opinion, the accompanying consolidated balance sheets and the related consolidated statements of operations, of 
comprehensive loss, of redeemable convertible preferred stock, convertible preferred stock and stockholders’ equity 
(deficit) and of cash flows  present fairly, in all material respects, the financial position of Twitter, Inc. and its subsidiaries 
at December 31, 2014 and 2013, and the results of their operations and their cash flows for each of the three years in the 
period ended December 31, 2014 in conformity with accounting principles generally accepted in the United States of 
America.  In addition, in our opinion, the financial statement schedule listed in the index appearing under item 15.2 
presents fairly, in all material respects, the information set forth therein when read in conjunction with the related 
consolidated financial statements.  Also in our opinion, the Company maintained, in all material respects, effective internal 
control over financial reporting as of December 31, 2014, based on criteria established in Internal Control - Integrated 
Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).  The 
Company's management is responsible for these financial statements and financial statement schedule, for maintaining 
effective internal control over financial reporting and for its assessment of the effectiveness of internal control over 
financial reporting, included in Management's Report on Internal Control over Financial Reporting appearing under Item 
9A.  Our responsibility is to express opinions on these financial statements, on the financial statement schedule, and on 
the Company's internal control over financial reporting based on our audits (which was an integrated audit in 2014).  We 
conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United 
States).  Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the 
financial statements are free of material misstatement and whether effective internal control over financial reporting was 
maintained in all material respects.  Our audits of the financial statements included examining, on a test basis, evidence 
supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and 
significant estimates made by management, and evaluating the overall financial statement presentation.  Our audit of 
internal control over financial reporting included obtaining an understanding of internal control over financial reporting, 
assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of 
internal control based on the assessed risk.  Our audits also included performing such other procedures as we considered 
necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions. 

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the 
reliability of financial reporting and the preparation of financial statements for external purposes in accordance with 
generally accepted accounting principles.  A company’s internal control over financial reporting includes those policies 
and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the 
transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are 
recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting 
principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of 
management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely 
detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the 
financial statements. 

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements.  Also, 
projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become 
inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may 
deteriorate.  

/s/ PricewaterhouseCoopers LLP  

San Jose, California  

March 2, 2015  

64 

 
 
 
 
TWITTER, INC.  
CONSOLIDATED BALANCE SHEETS  
(In thousands, except par value)  

  December 31, 

  December 31, 

2014 

2013 

Assets 
Current assets: 

Cash and cash equivalents ............................................................................................................................   $ 
Short-term investments ..................................................................................................................................     
Accounts receivable, net of allowance for doubtful accounts of $5,507 and $2,020 as 
   of December 31, 2014 and 2013, respectively ............................................................................................ 
Prepaid expenses and other current assets ...................................................................................................     
Total current assets..................................................................................................................................     
Property and equipment, net ................................................................................................................................     
Intangible assets ..................................................................................................................................................     
Goodwill ................................................................................................................................................................     
Other assets .........................................................................................................................................................     
Total assets ..............................................................................................................................................   $ 

Liabilities and stockholders' equity 
Current liabilities: 

Accounts payable ...........................................................................................................................................   $ 
Accrued and other current liabilities ...............................................................................................................     
Capital leases, short-term ..............................................................................................................................     
Total current liabilities ..............................................................................................................................     
Convertible notes .................................................................................................................................................     
Capital leases, long-term ......................................................................................................................................     
Deferred and other long-term tax liabilities, net ....................................................................................................     
Other long-term liabilities ......................................................................................................................................     
Total liabilities ...........................................................................................................................................     

Commitments and contingencies (Note 14) .........................................................................................................       
Stockholders' equity: 

1,510,724  $
2,111,154   

418,454   
215,521   
4,255,853   
557,019   
105,011   
622,570   
42,629   
5,583,082  $

53,241  $
228,233   
112,320   
393,794   
1,376,020   
118,950   
24,706   
43,209   
1,956,679   

841,010 
1,393,044 

247,328 
93,297 
2,574,679 
332,662 
77,627 
363,477 
17,795 
3,366,240 

27,994 
110,310 
87,126 
225,430 
— 
110,520 
59,500 
20,784 
416,234 

Preferred stock, $0.000005 par value-- 200,000 shares authorized; none issued and outstanding ..............     
Common stock, $0.000005 par value-- 5,000,000 shares authorized; 642,385 and 569,922 shares 
   issued and outstanding as of December 31, 2014 and 2013, respectively ................................................. 
Additional paid-in capital ................................................................................................................................     
Accumulated other comprehensive loss ........................................................................................................     
Accumulated deficit ........................................................................................................................................     
Total stockholders' equity ...............................................................................................................................     
Total liabilities and stockholders' equity ...................................................................................................   $ 

—   

— 

3   
5,208,870   
(10,024)  
(1,572,446)  
3,626,403   
5,583,082  $

3 
3,944,952 
(323)
(994,626)
2,950,006 
3,366,240 

The accompanying notes are an integral part of these consolidated financial statements.  

65 

 
 
  
  
 
  
 
 
 
      
      
 
      
      
 
 
  
      
      
 
      
      
 
      
 
      
      
 
 
  
 
 
TWITTER, INC.  
CONSOLIDATED STATEMENTS OF OPERATIONS  
(In thousands, except per share data)  

Revenue .......................................................................................................   $ 1,403,002     $ 
Costs and expenses 

2014 

Year Ended December 31, 
2013 
664,890    $

Cost of revenue .......................................................................................  
Research and development ....................................................................  
Sales and marketing ................................................................................  
General and administrative .....................................................................  
Total costs and expenses ...................................................................  
Loss from operations ..........................................................................  
Interest income (expense), net .....................................................................  
Other income (expense), net ........................................................................  
Loss before income taxes ............................................................................  
Provision (benefit) for income taxes .............................................................  
Net loss .........................................................................................................   $
Net loss per share attributable to common stockholders: 

446,309       
691,543       
614,110       
189,906       

266,718     
593,992     
316,216     
123,795     
  1,941,868        1,300,721     
(635,831)    
(6,860)    
(4,455)    
(647,146)    
(1,823)    
(645,323)   $

(538,866 )     
(33,985 )     
(5,500 )     
(578,351 )     
(531 )     
(577,820 )   $ 

2012 
316,933 

128,768 
119,004 
86,551 
59,693 
394,016 
(77,083)
(2,486)
399 
(79,170)
229 
(79,399)

Basic ...................................................................................................   $
Diluted .................................................................................................  $

(0.96 )   $ 
(0.96 )   $ 

(3.41)   $
(3.41)   $

(0.68)
(0.68)

Weighted-average shares used to compute net loss 
   per share attributable to common stockholders: 

Basic .................................................................................................... 
Diluted ..................................................................................................   

604,990       
604,990       

189,510     
189,510     

117,401 
117,401 

The accompanying notes are an integral part of these consolidated financial statements. 

66 

 
 
  
 
 
   
 
       
     
 
 
 
 
 
 
 
 
 
 
 
       
     
 
 
   
  
  
 
 
 
 
 
 
 
TWITTER, INC.  
CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS  
(In thousands)  

Net loss .......................................................................................................   $
Other comprehensive income (loss): 

Unrealized gain (loss) on investments in available-for-sale securities, 
net of tax ................................................................................................ 
Foreign currency translation adjustment ...............................................    
Net change in accumulated other comprehensive loss .............................    
Comprehensive loss ..............................................................................   $

2014 
(577,820)   $ 

Year Ended December 31, 
2013 
(645,323)   $

2012 

(79,399)

(877)
(8,824)     
(9,701)     
(587,521)   $ 

(76)
410     
334     
(644,989)   $

41 
(666)
(625)
(80,024)

The accompanying notes are an integral part of these consolidated financial statements.  

67 

 
 
  
  
 
 
  
 
 
 
   
      
     
 
 
 
  
  
 
 
 
 
TWITTER, INC.  
CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK, CONVERTIBLE PREFERRED STOCK 
AND STOCKHOLDERS’ EQUITY (DEFICIT)  
(In thousands)  

2014

2013 

2012

Shares

Amount

Shares

    Amount 

     Shares

Amount

Year Ended December 31, 

Redeemable convertible preferred stock 

Balance, beginning of period .................................................................    
Issuance of stock in connection with acquisitions .................................    
Issuance of restricted stock to employees in connection with 
acquisitions ........................................................................................... 
Forfeiture of restricted stock ..................................................................    
Conversion of Redeemable Class A junior preferred stock to common 
stock ...................................................................................................... 

Balance, end of period ....................................................................    

Convertible preferred stock 

Balance, beginning of period .................................................................    
Series G convertible preferred stock issuance cost adjustment ............    
Conversion of convertible preferred stock to common stock .................    
Balance, end of period ....................................................................    

Stockholders' equity (deficit) 
Common stock 

-    $
-     

-     
-     

-     
-    $

-    $
-     
-     
-    $

Balance, beginning of period .................................................................    
Issuance of common stock in connection with RSU vesting ..................    
Issuance of common stock in connection with acquisitions ...................    
Stock-based compensation for restricted stock issued in connection 
with acquisitions .................................................................................... 
Exercise of stock options .......................................................................    
Issuance of common stock upon purchases under employee stock 
purchase plan ........................................................................................ 
Issuance of common stock upon initial public offering ..........................    
Conversion of Redeemable Class A junior preferred stock to common 
stock ...................................................................................................... 
Conversion of convertible preferred stock to common stock .................    
Shares withheld related to net share settlement of equity awards ........    
Other activities ......................................................................................    
Balance, end of period ....................................................................    

569,922    $
42,748     
3,326     

2,337     
22,447     

1,887     
-     

-     
-     
(307)   
25     
642,385    $

-     
-     

-     
-     

-     
-     

-     
-     
-     
-     

3     
-     
-     

-     
-     

-     
-     

-     
-     
-     
-     
3     

3,569     $ 
-       

37,106       
-       

135   $
2,742    

49  
37,057  

-       
(45 )     

-       
-       

704    
(12 )  

-  
-  

(3,524 )     
-     $ 

(37,106 )     
-       

-    

-  
3,569   $ 37,106  

329,575     $ 
-       
(329,575 )     
-     $ 

835,430       
-       
(835,430 )     
-       

329,575   $ 835,073  
357  
-  
329,575   $ 835,430  

-    
-    

125,597     $ 
-       
17,665       

5,775       
7,408       

-       
80,500       

3,524       
329,575       
-       
(122 )     
569,922     $ 

1       
-       
-       

-       
-       

-       
-       

-       
2       
-       
-       
3       

118,967   $
-    
674    

903    
5,577    

-    
-    

-    
-    
-    
(524 )  
125,597   $

1  
-  
-  

-  
-  

-  
-  

-  
-  
-  
-  
1  

Additional paid-in capital 

Balance, beginning of period .................................................................    
Issuance of common stock in connection with acquisitions ...................    
Stock-based compensation for restricted stock issued in connection 
with acquisitions .................................................................................... 
Exercise of stock options .......................................................................    
Issuance of common stock upon purchases under employee stock 
purchase plan ........................................................................................ 
Issuance of common stock upon initial public offering, net of issuance 
costs ...................................................................................................... 
Conversion of preferred stock to common stock ...................................    
Shares withheld related to net share settlement of equity awards ........    
Stock-based compensation ...................................................................    
Reclassification of preferred stock liability and preferred stock warrant 
liability to additional paid-in capital ........................................................ 
Equity component of the convertible note issuance, net .......................    
Purchase of convertible note hedge ......................................................    
Issuance of warrants .............................................................................    
Other activities ......................................................................................    
Balance, end of period ....................................................................    

Accumulated other comprehensive loss 

Balance, beginning of period .................................................................    
Other comprehensive income (loss) ......................................................    
Balance, end of period ....................................................................    

Accumulated deficit 

-    $ 3,944,952     
147,958     
-     

-     $ 
-       

101,787       
335,913       

-   $ 68,097  
12,399  
-    

-     
-     

-     

-     
-     
-     
-     

63,880     
28,881     

42,402     

(240)   
-     
(17,053)   
608,491     

-     
-     
505,982     
-     
(407,169)   
-     
289,272     
-     
-     
1,514     
-    $ 5,208,870     

-    $
-     
-    $

(323)   
(9,701)   
(10,024)   

-       
-       

-       

31,708       
8,751       

-       

-        2,019,741       
872,534       
-       
(14,637 )     
-       
564,440       
-       

24,241       
-       
-       
-       
-       
-       
-       
-       
-       
474       
-     $  3,944,952       

-     $ 
-       
-     $ 

(657 )     
334       
(323 )     

-    
-    

-    

-    
-    
-    
-    

3,815  
2,317  

-  

-  
-  
-  
14,052  

-  
-    
-  
-    
-  
-    
-  
-    
-    
1,107  
-   $ 101,787  

-   $
-    
-   $

(32 )
(625 )
(657 )

Balance, beginning of period .................................................................    
Net loss .................................................................................................    
Balance, end of period ....................................................................    
Total stockholders' equity (deficit) ...........................................................   

(994,626)   
-    $
-     
(577,820)   
-    $ (1,572,446)   
642,385    $ 3,626,403     

-     $ 
-       
-     $ 

(349,303 )     
(645,323 )     
(994,626 )     
569,922     $  2,950,006       

-   $ (269,904 )
-    
(79,399 )
-   $ (349,303 )
125,597   $ (248,172 )

The accompanying notes are an integral part of these consolidated financial statements.  

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TWITTER, INC.  
CONSOLIDATED STATEMENTS OF CASH FLOWS  
(In thousands) 

Cash flows from operating activities 

Net loss .....................................................................................................................................   $
Adjustments to reconcile net loss to net cash provided by (used in) operating activities: 

(577,820 ) 

 $ 

(645,323 ) $

(79,399)

Year Ended December 31, 
2013 

2014 

2012 

Depreciation and amortization ............................................................................................    
Stock-based compensation expense ..................................................................................    
Amortization of discount on convertible notes .....................................................................    
Provision for bad debt .........................................................................................................    
Deferred income tax benefit ................................................................................................    
Non-cash acquisition-related costs .....................................................................................    
Amortization of investment premium and other...................................................................    
Changes in assets and liabilities, net of assets acquired and liabilities assumed from 
acquisitions: 

Accounts receivable ......................................................................................................    
Prepaid expenses and other assets ..............................................................................    
Accounts payable ..........................................................................................................    
Accrued and other liabilities ..........................................................................................    
Net cash provided by (used in) operating activities ................................................    

Cash flows from investing activities 

Purchases of property and equipment ......................................................................................    
Purchases of marketable securities ..........................................................................................    
Proceeds from maturities of marketable securities ...................................................................    
Proceeds from sales of marketable securities...........................................................................    
Restricted cash ..........................................................................................................................    
Business combinations, net of cash acquired and purchases of intangible assets ...................    
Net cash provided by (used in) investing activities .................................................    

Cash flows from financing activities 

Net proceeds from issuance of common stock upon initial public offering ................................    
Proceeds from issuance of convertible notes............................................................................    
Convertible notes initial issuance discount ...............................................................................    
Purchases of convertible note hedges ......................................................................................    
Proceeds from issuance of warrants .........................................................................................    
Taxes paid related to net share settlement of equity awards ....................................................    
Repayments of capital lease obligations ...................................................................................    
Proceeds from exercise of stock options, net of repurchase ....................................................    
Proceeds from issuances of common stock under employee stock purchase plan ..................    
Other financing activities ...........................................................................................................    
Net cash provided by (used in) financing activities ....................................................    
Net increase (decrease) in cash and cash equivalents ................................................................    
Foreign exchange effect on cash and cash equivalents ..............................................................    
Cash and cash equivalents at beginning of period .......................................................................    
Cash and cash equivalents at end of period ................................................................................   $
Supplemental cash flow data 

208,165   
631,597   
18,823   
4,632   
(9,609 ) 
320   
7,663   

(177,583 ) 
(165,395 ) 
18,059   
122,944   
81,796   

(201,630 ) 
(2,937,033 ) 
2,029,518   
188,092   
(11,042 ) 
(165,177 ) 
(1,097,272 ) 

—   
1,889,000   
(28,810 ) 
(407,169 ) 
289,272   
(17,053 ) 
(103,135 ) 
28,658   
42,402   
(1,443 ) 
1,691,722   
676,246   
(6,532 ) 
841,010   
1,510,724   

110,894  
600,367  
— 
1,557  
(8,902 )
704 
3,457  

(112,060 )
(12,045 )
7,957  
54,792  
1,398  

(75,744 )
(1,573,489 )
355,270  
42,816  
(10,847 )
(44,072 )
(1,306,066 )

2,018,579  
— 
— 
— 
— 
(14,637 )
(70,445 )
8,679  
— 
— 
1,942,176  
637,508  
174 
203,328  
841,010   $

 $ 

Interest paid in cash ..................................................................................................................   $
Taxes paid in cash ....................................................................................................................   $

10,000     $ 
14,895     $ 

6,850   $
2,391   $

Supplemental disclosures of non-cash investing and financing activities 

Conversion of preferred stock to common stock .......................................................................   $
Common and convertible preferred stock issued in connection with acquisitions ....................   $
Equipment purchases under capital leases...............................................................................   $
Changes in accrued equipment purchases ...............................................................................   $
Unpaid deferred offering costs ..................................................................................................   $

—     $ 
147,958     $ 
140,685     $ 
6,562     $ 
—     $ 

872,536   $
331,766   $
155,722   $
(1,602 ) $
1,162   $

The accompanying notes are an integral part of these consolidated financial statements.  

72,506 
25,741 
— 
1,844 
(1,098)
1,715 
4,102 

(73,898)
(6,691)
2,931 
24,312 
(27,935)

(50,599)
(542,638)
621,049 
26,300 
(3,143)
(1,526)
49,443 

— 
— 
— 
— 
— 
— 
(39,436)
2,312 
— 
— 
(37,124)
(15,616)
(52)
218,996 
203,328 

3,126 
358 

— 
47,127 
110,206 
15,734 
— 

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TWITTER, INC.  
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  

Note 1. The Company  

Twitter, Inc. (“Twitter” or the “Company”) was incorporated in Delaware in April 2007, and is headquartered in San 

Francisco, California. Twitter offers products and services for users, advertisers, developers and platform and data 
partners.   

Note 2. Summary of Significant Accounting Policies  
Basis of Presentation  

The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All 

significant intercompany accounts and transactions have been eliminated in consolidation. 

Use of Estimates  

The preparation of the Company’s consolidated financial statements in conformity with generally accepted 

accounting principles in the United States of America (“U.S. GAAP”) requires management to make estimates and 
assumptions that affect the reported amounts of assets, liabilities, revenue and expenses, as well as related disclosure of 
contingent assets and liabilities. Actual results could differ materially from the Company’s estimates. To the extent that 
there are material differences between these estimates and actual results, the Company’s financial condition or operating 
results will be affected. The Company bases its estimates on past experience and other assumptions that the Company 
believes are reasonable under the circumstances, and the Company evaluates these estimates on an ongoing basis.  

Revenue Recognition  

The Company generates revenue principally from the sale of advertising services and, to a lesser extent, from 
entering into data licensing and other arrangements. The Company’s advertising services include three primary products: 
(i) Promoted Tweets, (ii) Promoted Accounts and (iii) Promoted Trends. Promoted Tweets and Promoted Accounts are 
pay-for-performance advertising products priced through an auction. Promoted Trends are featured by geography and 
offered on a fixed-fee-per-day basis. Advertisers are obligated to pay when a user engages with a Promoted Tweet or 
follows a Promoted Account or when a Promoted Trend is displayed. Users engage with Promoted Tweets by clicking on 
a link in a Promoted Tweet, expanding, retweeting, favoriting or replying to a Promoted Tweet or following the account 
that tweets a Promoted Tweet. These products may be sold in combination as a multiple element arrangement or 
separately on a stand-alone basis. Fees for these advertising services are recognized in the period when advertising is 
delivered as evidenced by a user engaging with a Promoted Tweet, as captured by a click, following a Promoted Account 
or through the display of a Promoted Trend on the Company’s platform. Data licensing revenue is generated based on 
monthly service fees charged to the data partners over the period in which the Company’s data and data products are 
made available to them. Other revenue is primarily generated from service fees from transactions completed  on the 
mobile ad exchange. The Company’s mobile ad exchange enables buyers and sellers to purchase and sell advertising 
inventory and matches buyers and sellers. The Company has determined it is not the principal in the purchase and sale of 
advertising inventory in transactions between third party buyers and sellers on the exchange. Therefore, the Company 
reports revenue related to its ad exchange services on a net basis.   

Revenue is recognized only when (1) persuasive evidence of an arrangement exists; (2) the price is fixed or 
determinable; (3) the service is performed; and (4) collectability of the related fee is reasonably assured. While the 
majority of the Company’s revenue transactions are based on standard business terms and conditions, the Company also 
enters into non-standard sales agreements with advertisers and data partners that sometimes involve multiple elements.  

70 

 
 
 
 
 
For arrangements involving multiple deliverables, judgment is required to determine the appropriate accounting, 

including developing an estimate of the stand-alone selling price of each deliverable. When neither vendor-specific 
objective evidence nor third-party evidence of selling price exists, the Company uses its best estimate of selling price 
(BESP) to allocate the arrangement consideration on a relative selling price basis to each deliverable. The objective of 
BESP is to determine the selling price of each deliverable when it is sold to advertisers on a stand-alone basis. In 
determining BESPs, the Company takes into consideration various factors, including, but not limited to, prices the 
Company charges for similar offerings, sales volume, geographies, pricing strategies and market conditions. Multiple 
deliverable arrangements primarily consist of combinations of the Company’s pay-for-performance products, Promoted 
Tweets and Promoted Accounts, which are priced through an auction, and Promoted Trends, which are priced on a fixed-
fee-per day per geography basis. For arrangements that include a combination of these products, the Company develops 
an estimate of the selling price for these products in order to allocate any potential discount to all advertising products in 
the arrangement. The estimate of selling price for pay-for-performance products is determined based on the winning bid 
price; the estimate of selling price for Promoted Trends is based on Promoted Trends sold on a stand-alone basis and/or 
separately priced in a bundled arrangement by reference to a list price by geography which is approved periodically. The 
Company believes the use of BESP results in revenue recognition in a manner consistent with the underlying economics 
of the transaction and allocates the arrangement consideration on a relative selling price basis to each deliverable.  

Cost of Revenue  

Cost of revenue consists primarily of data center costs related to the Company’s co-located facilities, which includes 
lease and hosting costs, related support and maintenance costs and energy and bandwidth costs, as well as depreciation 
of its servers and networking equipment, networking costs and personnel-related costs, including salaries, benefits and 
stock-based compensation, for its operations teams. Cost of revenue also includes allocated facilities and other 
supporting overhead costs, amortization expense of technology acquired through acquisitions and capitalized labor costs.  

Stock-Based Compensation Expense  

The Company accounts for stock-based compensation expense under the fair value recognition and measurement 

provisions of U.S. GAAP. Stock-based awards granted to employees are measured based on the grant-date fair value 
with the resulting expense recognized over the respective period during which the award recipient is required to provide 
service. 

Pre-2013 RSUs, as defined and further described in Note 12—Common Stock and Stockholders’ Equity (Deficit), 

vest upon satisfaction of both a service condition and a performance condition. The service condition for these awards is 
generally satisfied over four years. The performance condition was satisfied in February 2014 pursuant to the terms of the 
Company’s 2007 Equity Incentive Plan. Prior to the closing of the Company’s initial public offering in November 2013, the 
Company had not recognized any stock-based compensation expense for the Pre-2013 RSUs, because the performance 
condition had not been satisfied. As the satisfaction of the performance condition became probable upon completion of 
the Company’s initial public offering for the Pre-2013 RSUs for which the service condition had been satisfied as of such 
date, the Company recorded the cumulative stock-based compensation expense for these RSUs during the three months 
ended December 31, 2013, using the accelerated attribution method. The remaining unrecognized stock-based 
compensation expense related to the Pre-2013 RSUs will be recorded over the remaining requisite service period using 
the accelerated attribution method. 

Post-2013 RSUs, as defined and further described in Note 12—Common Stock and Stockholders’ Equity (Deficit), 
are not subject to a performance condition in order to vest. The service condition for these awards is generally satisfied 
over four years. The compensation expense related to these RSUs is recognized on a straight-line basis over the requisite 
service period.  

71 

 
 
The Company estimates the fair value of stock options granted and stock purchase rights provided under the 
Company’s employee stock purchase plan using the Black-Scholes option pricing model on the dates of grant. Calculating 
the fair value using the Black-Scholes model requires various judgmental assumptions including the expected term and 
stock price volatility. The Company estimates the expected term of stock options granted based on the simplified method. 
The Company estimates the expected volatility of its common stock on the dates of grant based on a combination of the 
Company’s historical stock price volatility and implied volatility in the Company’s traded options when such information is 
available. When the Company’s historical and implied volatility data are not available for the related awards’ expected 
term, an average of volatility rates including the historical volatility of a group of comparable, publicly-traded companies is 
used. The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant. Expected dividend 
yield is zero percent as the Company has not paid and does not anticipate paying dividends on its common stock. The 
compensation expense related to stock options and employee stock purchase rights is recognized on a straight-line basis 
over the requisite service period. 

The Company issues restricted stock subject to a lapsing right of repurchase to continuing employees of certain 
acquired companies. Since these issuances are subject to post-acquisition employment, the Company accounts for them 
as post-acquisition stock-based compensation expense. The grant-date fair value of restricted stock granted in connection 
with acquisitions is recognized as stock-based compensation expense on a straight-line basis over the requisite service 
period. 

Stock-based compensation expense is recorded net of estimated forfeitures. The Company estimates the forfeiture 

rate based on historical forfeitures of stock-based awards and adjusts the rate to reflect changes in facts and 
circumstances, if any. 

Acquisitions  

The Company accounts for acquisitions of entities that include inputs and processes and have the ability to create 

outputs as business combinations in accordance with Accounting Standards Codification (“ASC”) Topic 805 Business 
Combinations. The purchase price of the acquisition is allocated to the tangible and intangible assets acquired and 
liabilities assumed based on their estimated fair values at the acquisition dates. The excess of the purchase price over 
those fair values is recorded as goodwill. During the measurement period, which may be up to one year from the 
acquisition date, the Company may record adjustments to the assets acquired and liabilities assumed with the 
corresponding offset to goodwill. Upon the conclusion of the measurement period or final determination of the values of 
assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to the 
consolidated statements of operations.  

Costs to exit or restructure certain activities of an acquired company or the Company’s internal operations are 

accounted for as one-time termination and exit costs and are accounted for separately from the business combination. 
Restructuring and other acquisition-related costs are expensed as incurred.  

Operating and Capital Leases  

The Company leases office space and data center facilities under operating leases. Certain lease agreements 
contain free or escalating rent payment provisions. The Company recognizes rent expense under such leases on a 
straight-line basis over the term of the lease. Lease renewal periods are considered on a lease-by-lease basis in 
determining the lease term.  

The Company also enters into server and networking equipment lease arrangements with original lease terms 
ranging from two to four years. The classification of each lease arrangement is determined in accordance with the criteria 
outlined in ASC Topic 840 Leases. The Company’s server and networking equipment leases typically are accounted for 
as capital leases as they meet one or more of the four capital lease classification criteria. Assets acquired under capital 
leases are amortized over the shorter of the remaining lease term or their estimated useful life. As of December 31, 2014 
and 2013, the Company had capital lease obligations included in short-term and long-term capital lease obligations in the 
consolidated balance sheets of $231.3 million and $197.6 million, respectively. In the years ended December 31, 2014, 
2013 and 2012, the Company recorded approximately $10.2 million, $7.0 million and $3.1 million, respectively, of interest 
expense in relation to these capital lease arrangements.  

72 

 
 
Cash, Cash Equivalents and Investments  

The Company invests its excess cash primarily in short-term interest-bearing obligations, including government and 

investment-grade debt securities and money market funds. The Company classifies all liquid investments with stated 
maturities of three months or less from date of purchase as cash equivalents.  The Company classifies  investments with 
stated maturities of greater than three months and less than 12 months from the date of purchase as short-term 
investments and those with stated maturities of 12 months or greater as long-term investments in the consolidated 
balance sheets. As of December 31, 2014 and 2013, the Company did not hold any long-term investments. As of 
December 31, 2014 and 2013, the Company has recorded restricted cash balances of $2.6 million and $4.9 million, 
respectively, within prepaid expenses and other current assets and $28.3 million and $15.3 million, respectively, in other 
assets on the accompanying consolidated balance sheets based upon the term of the remaining restrictions. These 
restricted cash balances are primarily related to certain operating lease arrangements. 

The Company determines the appropriate classification of its investments in marketable securities at the time of 

purchase and reevaluates such designation at each balance sheet date. The Company has classified and accounted for 
its marketable securities as available-for-sale. After considering the Company’s capital preservation objectives, as well as 
its liquidity requirements, the Company may sell securities prior to their stated maturities. The Company carries its 
available-for-sale securities at fair value, and reports the unrealized gains and losses, net of taxes, as a component of 
stockholders’ equity (deficit), except for unrealized losses determined to be other than temporary which are recorded as 
other income (expense), net. The Company determines any realized gains or losses on the sale of marketable securities 
on a specific identification method and records such gains and losses as a component of other income (expense), net. 
Interest earned on investments in marketable securities was $1.9 million, $0.7 million, and $0.8 million during the years 
ended December 31, 2014, 2013 and 2012, respectively. These balances are recorded in interest income (expense), net 
in the accompanying consolidated statements of operations.  

The Company evaluates the investments periodically for possible other-than-temporary impairment. A decline in fair 
value below the amortized costs of debt securities is considered an other-than-temporary impairment if the Company has 
the intent to sell the security or it is more likely than not that the Company will be required to sell the security before 
recovery of the entire amortized cost basis. In those instances, an impairment charge equal to the difference between the 
fair value and the amortized cost basis is recognized in earnings. Regardless of the Company’s intent or requirement to 
sell a debt security, impairment is considered other-than-temporary if the Company does not expect to recover the entire 
amortized cost basis.  

Concentration of Credit Risk  

Financial instruments that potentially subject the Company to significant concentration of credit risk consist primarily 

of cash, cash equivalents, short-term investments and accounts receivable. The primary focus of the Company’s 
investment strategy is to preserve capital and meet liquidity requirements. The Company’s investment policy addresses 
the level of credit exposure by limiting the concentration in any one corporate issuer or sector and establishing a minimum 
allowable credit rating. To manage the risk exposure, the Company invests cash, cash equivalents and short-term 
investments in a variety of fixed income securities, including short-term interest-bearing obligations, including government 
and investment-grade debt securities and money market funds. The Company places its cash primarily in checking and 
money market accounts with reputable financial institutions. Deposits held with these financial institutions may exceed the 
amount of insurance provided on such deposits, if any.  

The Company’s accounts receivable are typically unsecured and are derived from customers around the world in 

different industries. The Company performs ongoing credit evaluations of its customers and maintains allowances for 
potential credit losses. Historically, such losses have been within management’s expectations. As of December 31, 2014 
and 2013, no single customer accounted for more than 10% of the Company’s net accounts receivable balance. No single 
customer accounted for more than 10% of the Company’s revenue in the years ended December 31, 2014, 2013 and 
2012. 

The Company’s note hedge transactions, entered into in connection with the Notes, expose the Company to credit 

risk to the extent that its counterparties may be unable to meet the terms of the transactions. The Company mitigates this 
risk by limiting its counterparties to major financial institutions.  

73 

 
 
Accounts Receivable, Net  

The Company records accounts receivable at the invoiced amount. The Company maintains an allowance for 
doubtful accounts to reserve for potentially uncollectible receivable amounts. In evaluating the Company’s ability to collect 
outstanding receivable balances, the Company considers various factors including the age of the balance, the 
creditworthiness of the customer, which is assessed based on ongoing credit evaluations and payment history, and the 
customer’s current financial condition.  

Property and Equipment, Net  

Property and equipment are stated at cost and depreciated using the straight-line method over the estimated useful 

lives of the assets. Assets acquired under capital leases and leasehold improvements are amortized using the straight-
line method over the shorter of the lease term or the estimated useful life. The estimated useful lives of property and 
equipment are described below:  

Property and Equipment 

Estimated Useful Life 

Computer hardware and networking equipment .....................   Two to four years 
Computer software ..................................................................   One to three years 
Office equipment and other .....................................................   Five years 
Leased equipment and leasehold improvements ...................   Lesser of estimated useful life or remaining lease term 

Costs of maintenance and repairs that do not improve or extend the lives of the respective assets are expensed as 

incurred. Upon retirement or sale, the cost and related accumulated depreciation are removed from the balance sheet and 
the resulting gain or loss is reflected in operating expenses.  

Goodwill  

Goodwill represents the excess of the purchase price over the fair value of the net tangible and intangible assets 

acquired in a business combination. Goodwill is not amortized, but is tested for impairment at least annually or more 
frequently if events or changes in circumstances indicate that the asset may be impaired. The Company’s impairment 
tests are based on a single operating segment and reporting unit structure.  If the carrying value of the reporting unit 
exceeds its fair value, the second step of the test is performed by comparing the carrying value of the goodwill in the 
reporting unit to its implied fair value. An impairment charge is recognized for the excess of the carrying value of goodwill 
over its implied fair value.  

The Company conducted its annual goodwill impairment test during the fourth quarter of 2014 and determined that 

goodwill was not impaired. As such, no impairment charge was recorded in any of the periods presented in the 
accompanying consolidated financial statements.  

Intangible Assets  

Intangible assets are carried at cost and amortized on a straight-line basis over their estimated useful lives, which 

range from one to eleven years. The Company reviews identifiable amortizable intangible assets to be held and used for 
impairment whenever events or changes in circumstances indicate that the carrying value of the assets may not be 
recoverable. Determination of recoverability is based on the lowest level of identifiable estimated undiscounted cash flows 
resulting from use of the asset and its eventual disposition. Measurement of any impairment loss is based on the excess 
of the carrying value of the asset over its fair value. There has been no impairment charges recorded in any of the periods 
presented in the accompanying consolidated financial statements. See Note 6—Goodwill and Intangible Assets for 
additional information.  

Fair Value Measurements  

The Financial Accounting Standards Board (the “FASB”)’s authoritative guidance on fair value measurements 

establishes a framework for measuring fair value and requires disclosure about the fair value measurements of assets 
and liabilities. This guidance requires the Company to classify and disclose assets and liabilities measured at fair value on 
a recurring basis, as well as fair value measurements of assets and liabilities measured on a nonrecurring basis in periods 
subsequent to initial measurement, in a three-tier fair value hierarchy as described below.  

74 

 
 
  
  
The guidance defines fair value as the exchange price that would be received for an asset or paid to transfer a 

liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market 
participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of 
observable inputs and minimize the use of unobservable inputs. The guidance describes three levels of inputs that may 
be used to measure fair value:  

Level 1—Observable inputs, such as quoted prices in active markets for identical assets or liabilities.  

Level 2—Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted 

prices in markets that are not active or other inputs that are observable or can be corroborated by observable market data 
for substantially the full term of the assets or liabilities.  

Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair 

value of the assets or liabilities.  

Internal Use Software and Website Development Costs  

The Company capitalizes certain costs incurred in developing software programs or websites for internal use. In the 

years ended December 31, 2014, 2013 and 2012, the Company capitalized costs totaling approximately $79.5 million, 
$35.6 million and $11.6 million, respectively. The estimated useful life of costs capitalized is evaluated for each specific 
project and is one to three years. In the years ended December 31, 2014, 2013 and 2012, the amortization of capitalized 
costs included in cost of revenue totaled approximately $15.2 million, $6.7 million and $5.6 million, respectively. 
Capitalized internal use software development costs are included in property and equipment, net. Included in the 
capitalized amounts above are $40.8 million, $13.6 million and $1.3 million of stock-based compensation expense in the 
years ended December 31, 2014, 2013 and 2012, respectively.  

Income Taxes  

The Company accounts for its income taxes using the asset and liability method whereby deferred tax assets and 
liabilities are determined based on temporary differences between the bases used for financial reporting and income tax 
reporting purposes, as well as for operating loss and tax credit carryforwards. Deferred income taxes are provided based 
on the enacted tax rates expected to be in effect at the time such temporary differences are expected to reverse. A 
valuation allowance is provided for deferred tax assets if it is more-likely-than-not that the Company will not realize those 
tax assets through future operations.  

The Company evaluates and accounts for uncertain tax positions using a two-step approach. Recognition (step one) 
occurs when the Company concludes that a tax position, based solely on its technical merits, is more-likely-than-not to be 
sustainable upon examination. Measurement (step two) determines the amount of benefit that is greater than 50% likely to 
be realized upon ultimate settlement with a taxing authority that has full knowledge of all relevant information. De-
recognition of a tax position that was previously recognized would occur when the Company subsequently determines that 
a tax position no longer meets the more-likely-than-not threshold of being sustained.  

Foreign Currency  

The functional currency of the Company's foreign subsidiaries is generally the local currency. The financial 

statements of these subsidiaries are translated into U.S. dollars using period-end rates of exchange for assets and 
liabilities, historical rates of exchange for equity, and average rates of exchange for revenue and expenses. Translation 
gains (losses) are recorded in accumulated other comprehensive income (loss) as a component of stockholders’ equity. 
Other income (expense), net in the accompanying consolidated statements of operations consists primarily of unrealized 
foreign exchange gains and losses due to re-measurement of monetary assets and liabilities denominated in non-
functional currencies as well as realized foreign exchange gains and losses on foreign exchange transactions. 

Advertising Costs  

Advertising costs are expensed when incurred and are included in sales and marketing expense in the 
accompanying consolidated statements of operations. Advertising expense totaled $46.6 million, $3.1 million and 
$0.7 million for the years ended December 31, 2014, 2013 and 2012 respectively. 

75 

 
 
Comprehensive Loss  

Comprehensive loss consists of two components, net loss and other comprehensive income (loss). Other 

comprehensive income (loss) refers to gains and losses that are recorded as an element of stockholders’ equity and are 
excluded from net loss. The Company’s other comprehensive income (loss) is comprised of unrealized gains or losses on 
available-for-sale securities, net of tax, and foreign currency translation adjustment.  

Recent Accounting Pronouncements  

In May 2014, the FASB issued a new accounting standard update on revenue recognition from contracts with 
customers. The new guidance will replace all current U.S. GAAP guidance on this topic and eliminate all industry-specific 
guidance. According to the new guidance, revenue is recognized when promised goods or services are transferred to 
customers in an amount that reflects the consideration for which the Company expects to be entitled in exchange for 
those goods or services. This guidance will be effective for the Company beginning January 1, 2017 and can be applied 
either retrospectively to each period presented or as a cumulative-effect adjustment as of the date of adoption. Early 
adoption is not permitted. The Company has not yet selected a transition method and is evaluating the impact of adopting 
this new accounting standard update on the financial statements and related disclosures.  

In June 2014, the FASB issued a new accounting standard update on stock-based compensation when the terms of 

an award provide that a performance target could be achieved after the requisite service period. The new guidance 
requires that a performance target that affects vesting, and that could be achieved after the requisite service period, be 
treated as a performance condition. As such, the performance target should not be reflected in estimating the grant-date 
fair value of the award. This update further clarifies that compensation cost should be recognized in the period in which it 
becomes probable that the performance target will be achieved and should represent the compensation cost attributable 
to the periods for which the requisite service has already been rendered. This guidance will be effective for fiscal years, 
and interim periods within those fiscal years, beginning after December 15, 2015 and can be applied either prospectively 
or retrospectively to all awards outstanding as of the beginning of the earliest annual period presented as an adjustment 
to opening retained earnings. Early adoption is permitted. Adoption of this new accounting standard update is expected to 
have no impact to the Company’s financial statements.  

Note 3. Cash, Cash Equivalents and Short-term Investments  

Cash, cash equivalents and short-term investments consist of the following (in thousands):  

  December 31, 

   December 31, 

2014 

2013 

Cash and cash equivalents: 

Cash ................................................................................................................   $
Money market funds ........................................................................................    
U.S. government and agency securities including treasury bills .....................    
Corporate notes, certificates of deposit and commercial paper ......................    
Total cash and cash equivalents ..........................................................................   $
Short-term investments: 

147,848   $ 
882,443     
271,418     
209,015     
1,510,724   $ 

164,135 
229,529 
251,593 
195,753 
841,010 

U.S. government and agency securities including treasury bills .....................   $
Corporate notes, certificates of deposit and commercial paper ......................    
Total short-term investments ................................................................................   $

1,009,541   $ 
1,101,613     
2,111,154   $ 

785,536 
607,508 
1,393,044 

76 

 
 
  
  
 
  
 
  
 
      
      
 
      
      
 
 
The following tables summarize unrealized gains and losses related to available-for-sale securities classified as 

short-term investments on the Company’s consolidated balance sheets as of December 31, 2014 and 2013 (in 
thousands):  

December 31, 2014 

Gross 

Gross 

Gross 

  Amortized 

    Unrealized 

    Unrealized 

Costs 

Gains 

Losses 

     Aggregated 
Estimated 
Fair Value 

U.S. Government and agency securities including
   treasury bills ........................................................ 
Corporate notes, certificates of deposit and 
   commercial paper ................................................ 
Total available-for-sale securities classified as 
   short-term investments ..................................... 

$ 1,009,827    $

8    $ 

(294 )   $ 1,009,541

1,102,275     

4     

(666 )    

1,101,613

$ 2,112,102    $

12    $ 

(960 )   $ 2,111,154

December 31, 2013 

Gross 

Gross 

Gross 

  Amortized 

    Unrealized 

    Unrealized 

Costs 

Gains 

Losses 

     Aggregated 
Estimated 
Fair Value 

U.S. Government and agency securities including
   treasury bills ........................................................ 
Corporate notes, certificates of deposit and 
   commercial paper ................................................ 
Total available-for-sale securities classified as 
   short-term investments ..................................... 

$

785,535    $

22    $ 

(21 )   $

785,536

607,590     

11     

(93 )    

607,508

$ 1,393,125    $

33    $ 

(114 )   $ 1,393,044

The available-for-sale securities classified as cash and cash equivalents on the consolidated balance sheets are not 

included in the tables above as the gross unrealized gains and losses were immaterial for each period; their carrying 
value approximates fair value because of the short maturity period of these instruments.  

The following tables show all short-term investments in an unrealized loss position for which other-than-temporary 
impairment has not been recognized and the related gross unrealized losses and fair value, aggregated by investment 
category and the length of time that individual securities have been in a continuous unrealized loss position (in 
thousands):  

Less than 12 Months 

December 31, 2014 
12 Months or Greater 

Total 

   Fair Value 

    Unrealized      
Loss 

    Fair Value     

    Unrealized         
Loss 

      Fair Value 

    Unrealized   

Loss 

U.S. Government and agency securities 
   including treasury bills ............................. 
Corporate notes, certificates of deposit 
   and commercial paper ............................. 
Total short-term investments in an 
   unrealized loss position ......................   $ 1,292,094    $

$  766,997    $

   525,097     

(294)   $

—    $

—     $  766,997    $

(294)

(666)    

—     

—        525,097     

(666)

(960)   $

—    $

—     $ 1,292,094    $

(960)

Less than 12 Months 

   Fair Value   

  Unrealized   
Loss 

December 31, 2013 
12 Months or Greater 

  Unrealized         

  Fair Value   

Loss 

      Fair Value   

Total 

  Unrealized   
Loss 

U.S. Government and agency securities 
   including treasury bills ............................. 
Corporate notes, certificates of deposit 
   and commercial paper ............................. 
Total short-term investments in an 
   unrealized loss position ......................   $  402,372    $

$  230,478    $

   171,894     

(21)   $

—    $

—     $  230,478    $

(93)    

—     

—        171,894     

(21)

(93)

(114)   $

—    $

—     $  402,372    $

(114)

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Investments are reviewed periodically to identify possible other-than-temporary impairments. No impairment loss 

has been recorded on the securities included in the tables above as the Company believes that the decrease in fair value 
of these securities is temporary and expects to recover up to (or beyond) the initial cost of investment for these securities.  

Note 4. Fair Value Measurements  

The Company measures its cash equivalents and short-term investments at fair value. The Company classifies its 
cash equivalents and short-term investments within Level 1 or Level 2 because the Company values these investments 
using quoted market prices or alternative pricing sources and models utilizing market observable inputs. The fair value of 
the Company’s Level 1 financial assets is based on quoted market prices of the identical underlying security. The fair 
value of the Company’s Level 2 financial assets is based on inputs that are directly or indirectly observable in the market, 
including the readily-available pricing sources for the identical underlying security that may not be actively traded. 

The following tables set forth the fair value of the Company’s financial assets and liabilities measured at fair value on 

a recurring basis as of December 31, 2014 and 2013 based on the three-tier fair value hierarchy (in thousands):  

Level 1 

Level 2 

Level 3 

Total 

December 31, 2014 

Assets 
Cash equivalents: 

Money market funds .................................................   $
Treasury bills ............................................................    
U.S. government securities ......................................    
Agency securities .....................................................    
Corporate notes ........................................................    
Commercial paper ....................................................    
Certificates of deposit ...............................................    

882,443    $
73,525     
—     
—     
—     
—     
—     

—    $ 
—      
157,895      
39,998      
13,684      
185,321      
10,010      

Short-term investments: 

Treasury bills ............................................................    
U.S. government securities ......................................    
Agency securities .....................................................    
Corporate notes ........................................................    
Commercial paper ....................................................    
Certificates of deposit ...............................................    
Total .....................................................................   $

167,575     
—     
—     
—     
—     
—     
1,123,543    $

—      
746,128      
95,838      
551,604      
300,589      
249,420      
2,350,487    $ 

—    $
—     
—     
—     
—     
—     
—     

—     
—     
—     
—     
—     
—     
—    $

882,443 
73,525 
157,895 
39,998 
13,684 
185,321 
10,010 

167,575 
746,128 
95,838 
551,604 
300,589 
249,420 
3,474,030 

Level 1 

Level 2 

Level 3 

Total 

December 31, 2013 

Assets 
Cash equivalents: 

Money market funds .................................................   $
Treasury bills ............................................................    
U.S. government securities ......................................    
Corporate notes ........................................................    
Commercial paper ....................................................    

Short-term investments: 

Treasury bills ............................................................    
U.S. government securities ......................................    
Agency securities .....................................................    
Corporate notes ........................................................    
Commercial paper ....................................................    
Certificates of deposit ...............................................    
Total .....................................................................   $

229,529    $
244,048     
—     
—     
—     

265,878     
—     
—     
—     
—     
—     
739,455    $

—    $ 
—      
7,545      
1,011      
194,742      

—      
501,372      
18,286      
255,546      
272,617      
79,345      
1,330,464    $ 

—    $
—     
—     
—     
—     

—     
—     
—     
—     
—     
—     
—    $

229,529 
244,048 
7,545 
1,011 
194,742 

265,878 
501,372 
18,286 
255,546 
272,617 
79,345 
2,069,919 

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The estimated fair value of the 2019 Notes and 2021 Notes based on a market approach as of December 31, 2014 

was approximately $817.5 million and $832.3 million respectively, which represents a Level 2 valuation.  The estimated 
fair value was determined based on the quoted closing price of the Notes in an over-the-counter market on December 31, 
2014. 

Note 5. Property and Equipment, Net  

The following table presents the detail of property and equipment, net for the periods presented (in thousands):  

December 31, 

2014 

    December 31,   
2013 

Property and equipment, net 
Equipment .......................................................................................  $
Furniture and leasehold improvements ..........................................   
Capitalized software .......................................................................   
Construction in progress .................................................................   
Total ...........................................................................................   
Less: Accumulated depreciation and amortization .........................   
Property and equipment, net .....................................................  $

584,561     $ 
131,851       
82,052       
89,806       
888,270       
(331,251 )     
557,019     $ 

367,949 
54,965 
47,290 
29,523 
499,727 
(167,065)
332,662 

The gross carrying amount of property and equipment includes $411.3 million and $283.8 million of server and 
networking equipment acquired under capital leases as of December 31, 2014 and 2013, respectively. The accumulated 
depreciation of the equipment under capital leases totaled $182.4 million and $86.2 million as of December 31, 2014 and 
2013, respectively.  

Depreciation expense totaled $171.6 million, $94.4 million and $53.8 million for the years ended December 31, 
2014, 2013 and 2012, respectively. Included in these amounts were depreciation expense for server and networking 
equipment acquired under capital leases in the amount of $108.7 million, $70.4 million and $40.5 million for the years 
ended December 31, 2014, 2013 and 2012, respectively.  

Note 6. Goodwill and Intangible Assets  

The following table presents the goodwill activities for the periods presented (in thousands):  

Goodwill 
Balance as of December 31, 2012 ......................................................................    $ 
Crashlytics acquisition ....................................................................................     
Bluefin acquisition ...........................................................................................     
MoPub acquisition ..........................................................................................     
Other acquisitions ...........................................................................................     
Balance as of December 31, 2013 ......................................................................    $ 
Gnip acquisition ..............................................................................................     
Other acquisitions ...........................................................................................     
Foreign currency translation adjustment ........................................................     
Balance as of December 31, 2014 ......................................................................    $ 

68,813 
33,254 
60,019 
192,446 
8,945 
363,477 
104,747 
155,054 
(708)
622,570 

For each of the periods presented, gross goodwill balance equaled the net balance since no impairment charges 

have been recorded. Refer to Note 8—Acquisitions for further details about goodwill.  

79 

 
 
  
  
  
   
 
    
        
 
 
 
      
 
  
 
  
  
  
The following table presents the detail of intangible assets for the periods presented (in thousands):  

Gross Carrying   
Value 

  Accumulated 
  Amortization 

      Net Carrying 

Value 

December 31, 2014: 

Patents and developed technologies .............................   $
Publisher and advertiser relationships ...........................  
Assembled workforce .....................................................  
Other intangible assets ...................................................  

Total ...........................................................................   $

December 31, 2013: 

Patents and developed technologies .............................   $
Publisher and advertiser relationships ...........................  
Assembled workforce .....................................................  
Other intangible assets ...................................................  

Total ...........................................................................   $

105,052    $
32,000     
1,960     
1,100     
140,112    $

100,553    $
21,100     
1,960     
1,100     
124,713    $

(23,165 )    $ 
(9,831 )      
(1,457 )      
(648 )      
(35,101 )    $ 

(45,440 )    $ 
(1,248 )      
(300 )      
(98 )      
(47,086 )    $ 

81,887 
22,169 
503 
452 
105,011 

55,113 
19,852 
1,660 
1,002 
77,627 

Patents and developed technologies are amortized over a period ranging from one to eleven years from the 
respective purchase dates. Publisher and advertiser relationships are amortized over a period ranging from two to three 
years, and assembled workforce and other intangible assets are amortized over a period of two to four years. 
Amortization expense associated with intangible assets for the years ended December 31, 2014 and 2013 was 
$36.6 million and $16.5 million, respectively. During the year ended December 31, 2014, $48.5 million in gross carrying 
value and accumulated amortization related to fully amortized intangible assets was eliminated. 

Estimated future amortization expense as of December 31, 2014 is as follows (in thousands): 

Years ending December 31, 
2015 ................................................................................................................  $ 
2016 ................................................................................................................ 
2017 ................................................................................................................ 
2018 ................................................................................................................ 
2019 ................................................................................................................ 
Thereafter ....................................................................................................... 

Total ...........................................................................................................  $ 

35,446 
26,260 
11,624 
9,832 
5,430 
16,419 
105,011 

Note 7. Other Balance Sheet Components  
Prepaid expenses and other current assets 

The following table presents the detail of prepaid and other current assets for the periods presented (in thousands):  

Deferred income tax assets, net ................................................  $
Prepaid and other ......................................................................   
Total ......................................................................................  $

25,882     $ 
189,639       
215,521     $ 

62,122 
31,175 
93,297 

December 31, 
2014 

     December 31, 

2013 

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Accrued and other current liabilities 

The following table presents the detail of accrued and other current liabilities for the periods presented (in 

thousands):  

  December 31, 

     December 31, 

2014 

2013 

Accrued compensation ............................................................   $
Accrued publisher payments ...................................................    
Accrued sales and marketing expenses ..................................    
Deferred revenue .....................................................................    
Accrued tax liabilities ...............................................................    
Accrued professional services .................................................    
Accrued other ..........................................................................    
Total ....................................................................................   $

68,000     $ 
27,996       
25,264       
18,679       
18,380       
13,543       
56,371       
228,233     $ 

29,882 
15,370 
1,813 
14,479 
9,515 
7,089 
32,162 
110,310 

Note 8. Acquisitions  

2014 Acquisitions In May 2014, the Company completed its acquisition of privately held Gnip, Inc. (“Gnip”), a 
leading provider of social data and analytics headquartered in Boulder, Colorado. The acquisition is expected to allow the 
Company to further enhance its data analytics capabilities. Under the terms of the acquisition, the Company agreed to pay 
$107.3 million in cash and issue a total of 0.6 million shares of its common stock, including shares of restricted stock 
subject to continued employment, in consideration for all of the issued and outstanding shares of capital stock of Gnip. In 
addition, the Company agreed to issue up to 0.4 million shares of the Company’s common stock as a result of assumed 
Gnip equity awards held by individuals, who will continue to provide services to the Company. The fair value of the total 
consideration of $134.1 million, including the earned portion of assumed stock options and other equity awards, was 
allocated to the acquired tangible and intangible assets and assumed liabilities based on their estimated fair values at 
closing as follows: $23.2 million to developed technology, $9.3 million to customer relationships, $9.1 million to tangible 
assets acquired, $5.8 million to liabilities assumed, $6.4 million to deferred tax liability recorded, and the excess 
$104.7 million of the purchase price over the fair value of net assets acquired was recorded as goodwill. This goodwill is 
primarily attributable to the potential expansion and future development of the Company’s data products, expected 
synergies arising from the acquisition and the value of acquired talent. Goodwill is not deductible for U.S. income tax 
purposes. Both developed technology and customer relationships will be amortized on a straight-line basis over their 
estimated useful life of 60 months. The discounted cash flow method, which calculates the fair value of an asset based on 
the value of cash flows that the asset is expected to generate in the future, was used to estimate the fair value of these 
intangible assets acquired. 

During the year ended December 31, 2014, the Company acquired eight other companies, which were accounted 

for as business combinations. The total purchase price of $188.1 million (paid in shares of the Company’s common stock 
having a total fair value of $121.2 million and cash of $66.9 million) for these acquisitions was preliminarily allocated as 
follows: $28.1 million to developed technologies, $1.6 million to customer relationships, $6.5 million to net tangible assets 
acquired based on their estimated fair value on the acquisition date, $3.2 million to deferred tax liability, and the excess 
$155.1 million of the purchase price over the fair value of net assets acquired to goodwill. Tax deductible goodwill 
resulting from certain of these acquisitions was $21.9 million as of December 31, 2014, the remaining amounts are not tax 
deductible for U.S. income tax purposes. Developed technologies and customer relationships will be amortized on a 
straight-line basis over their estimated useful lives of 12 to 48 months.  

In connection with all of the acquisitions completed during the year ended December 31, 2014, the Company also 
agreed to pay cash and shares of the Company’s common stock with a total fair value up to $97.7 million, which is to be 
paid to certain employees of the acquired entities contingent upon their continued employment with the Company. In 
addition, the fair value of assumed stock options determined to be part of post-acquisition stock-based compensation 
amounted to approximately $16.9 million. The Company recognizes compensation expense in relation to these cash and 
equity consideration and assumed stock options over the remaining requisite service periods of up to 48 months from the 
respective acquisition dates on a straight-line basis. 

The results of operations for each of these acquisitions have been included in the Company’s consolidated 
statements of operations since the date of acquisition. Actual and pro forma revenue and results of operations for these 
acquisitions have not been presented because they do not have a material impact to the consolidated revenue and results 
of operations, either individually or in aggregate.  

81 

 
 
  
  
 
  
 
    
 
  
 
2013 Acquisitions  

In January 2013, the Company acquired Crashlytics, Inc. (“Crashlytics”), a privately-held company based in 
Cambridge, Massachusetts, which developed mobile application crash reporting and analysis solutions for mobile 
application developers. The acquisition of Crashlytics has been accounted for as a business combination. The purchase 
price of $38.2 million paid in the Company’s common stock was allocated as follows: $5.0 million to developed 
technology, $0.3 million to assets acquired, $0.3 million to deferred tax liability recorded and $0.1 million to liabilities 
assumed, and the excess $33.3 million of the purchase price over the fair value of net assets acquired was recorded as 
goodwill. Goodwill is primarily attributable to the Company’s ability to further improve the efficiency and the overall 
performance of its mobile platform and the value of acquired talent. This goodwill is not deductible for U.S. income tax 
purposes. Developed technology will be amortized on a straight-line basis over its estimated useful life of 12 months. 
Under the terms of the acquisition, the Company has the right to the return of shares issued to non-employee investors if 
specified performance conditions tied to certain key employees’ continued employment at the Company for one year after 
the acquisition are not met. The fair value of these contingently returnable shares of $6.7 million is included in the 
purchase price and is classified as part of stockholders’ equity (deficit) on the consolidated balance sheets. As of 
December 31, 2014, the performance condition has been fully satisfied for these shares.  

In February 2013, the Company acquired Bluefin Labs, Inc. (“Bluefin”), a privately-held company based in 
Cambridge, Massachusetts, which provided social television analytics services to brand advertisers, agencies and TV 
networks. The acquisition of Bluefin has been accounted for as a business combination. The purchase price of 
$67.3 million paid in the Company’s common stock was allocated as follows: $7.4 million to developed technology, 
$1.8 million to assets acquired and $1.9 million to liabilities assumed based on their estimated fair value on the acquisition 
date, and the excess $60.0 million of the purchase price over the fair value of net assets acquired was recorded as 
goodwill. This goodwill is primarily attributable to the potential for future product offering, ability to further enhance the 
advertiser experience in using the Company’s services and the value of acquired talent. Goodwill is not deductible for U.S. 
income tax purposes. Developed technology will be amortized on a straight-line basis over its estimated useful life of 18 
months. Under the terms of the acquisition, the Company has the right to the return of shares issued to non-employee 
investors if specified performance conditions tied to certain key employees’ continued employment at the Company for 
one year after the acquisition are not met. The fair value of these contingently returnable shares of $7.9 million is included 
in the purchase price and is classified as part of stockholders’ equity (deficit) on the consolidated balance sheets. As of 
December 31, 2014, the performance condition has been fully satisfied for these shares.  

In October 2013, the Company acquired 100% of the ownership interest in privately held MoPub, Inc. (“MoPub”), a 

mobile-focused advertising exchange headquartered in San Francisco, California. Under the terms of the acquisition, all of 
the issued and outstanding shares of capital stock of MoPub, including shares of restricted stock subject to continued 
employment, were converted into 11.2 million shares of the Company’s common stock and 2.0 million shares of unvested 
restricted stock, and all equity awards to purchase shares of MoPub common stock held by individuals, who will continue 
to provide services to the Company, were converted into the right to receive an aggregate of 1.2 million shares of the 
Company’s stock options.  Of the aggregate acquisition consideration, approximately $218.8 million associated with the 
common stock issued and the fair value attributable to the portion of restricted stock and assumed stock options for which 
services had been rendered as of the closing of the acquisition was determined to be the accounting purchase price.  The 
purchase price was allocated to the acquired tangible and intangible assets and assumed liabilities based on their 
estimated fair values at closing as follows: $21.1 million to publisher and advertiser relationships, $12.9 million to 
developed technology, $1.1 million to trade name, $22.1 million to account receivables acquired, which are expected to be 
substantially collected, $1.2 million to other tangible assets acquired, $22.1 million to publisher payments liabilities 
assumed, $4.4 million to other liabilities assumed, $5.5 million to deferred tax liability recorded, and the excess 
$192.4 million of the purchase price over the fair value of net assets acquired was recorded as goodwill. This goodwill is 
primarily attributable to the potential expansion of the advertising business across the mobile ecosystem through 
continued investment in the MoPub exchange and expected synergies arising from the acquisition, the ability to further 
enhance the advertiser experience by building real-time bidding into the Twitter ads platform and the value of acquired 
talent. Goodwill is not deductible for U.S. income tax purposes. Publisher and advertiser relationships and developed 
technology will be amortized on a straight-line basis over their estimated useful life of 36 months, and trade name will be 
amortized on a straight-line basis over its estimated useful life of 24 months.  

82 

 
 
During the year ended December 31, 2013, the Company completed acquisitions of certain intangible assets for the 
total purchase price of $38.5 million. These transactions were accounted for as a purchase of assets and, accordingly, the 
total purchase price was allocated to the identifiable intangible assets acquired based on their respective fair values on 
the acquisition date. As a result of these transactions, the Company recorded intangible assets of $38.5 million, which 
was comprised of $36.0 million of patents, $2.0 million of assembled workforce and $0.5 million of developed technology. 
The patents, developed technology and assembled workforce will be amortized on a straight-line basis over their 
estimated useful lives of 1 to 11 years.  

During the year ended December 31, 2013, the Company completed acquisitions of five additional companies, 

which were not individually significant and accounted for as business combinations. The total purchase price for these 
acquisitions of $13.2 million (paid in shares of the Company’s common stock valued at approximately $7.4 million and 
cash consideration of $5.8 million) was primarily allocated to $4.5 million of developed technology and $0.2 million of 
assumed liabilities based on their estimated fair value on the acquisition date, and the excess $8.9 million of the purchase 
price over the fair value of net assets acquired was recorded as goodwill. Goodwill recorded in relation to these 
acquisitions is primarily attributable to expected synergies and the value of acquired assembled workforce. Two of the 
acquisitions resulted in tax-deductible goodwill of $7.3 million for U.S. income tax purposes. Developed technology will be 
amortized on a straight-line basis over their estimated useful lives of 24 to 36 months.  

In relation to the 2013 acquisitions, the Company also agreed to pay up to $83.1 million of equity consideration 
which was to be paid to certain employees of the acquired entities contingent upon their continued employment with the 
Company. The Company recognizes compensation expense related to the equity consideration over the requisite services 
periods of up to 48 months from the respective acquisition dates on a straight-line basis. The Company also granted to 
continuing employees options to purchase a total of 2.0 million shares of common stock in exchange for their outstanding 
options to purchase the shares of the acquired entities including 1.2 million shares granted in connection with the 
acquisition of MoPub disclosed above. Excluding the fair value of the stock options that was allocated and recorded as 
part of the purchase price for the portion of the service period completed pre-acquisition, the Company will recognize 
approximately $24.5 million of stock-based compensation expense in relation to these stock options over the remaining 
requisite service periods of up to 48 months from the respective acquisition dates on a straight-line basis.  

For business combinations closed in 2013 except for the acquisition of MoPub, the Company has considered all 

potential identifiable intangible assets and determined that it was not appropriate to allocate material amounts to 
identifiable intangible assets other than acquired developed technologies. In valuing these acquired developed 
technologies, the Company determined that neither the income approach nor the market approach was relevant, and, 
consistent with a market participant approach that would weigh a “make” versus “buy” decision when considering the 
acquisition of a particular incremental technology, applied the cost approach in determining the amount of purchase price 
allocated to acquired developed technology. The cost approach uses the concept of reproduction cost as an indicator of 
fair value. The premise of the cost approach is that a prudent investor would pay no more for an asset than the amount for 
which the asset could be replaced with a new one. Reproduction cost refers to the cost incurred to reproduce the asset 
using the exact same specifications. In order to apply the cost method to determine the fair value of each acquired 
developed technology, the Company considered the following: (i) the estimated development hours or equivalent of 
person months required to reproduce the technology, (ii) the related labor cost and (iii) an expected market participant 
profit margin.  

The Company utilized various forms of the income approach to measure the fair value of the publisher relationships, 

advertiser relationships, developed technology, and trade name acquired in the acquisition of MoPub. For the publisher 
relationships, fair value was determined based on the multi-period excess earnings approach which calculates the present 
value of the after-tax cash flows attributable to the intangible asset only. For the advertiser relationships, fair value was 
determined based on the distributor method which relies upon market-based distributor data to reasonably isolate the 
revenue, earnings, and cash flow attributable to sales efforts. For the developed technology and trade names acquired, 
fair value was determined based on the relief from royalty method, which calculates the present value of the after-tax 
royalty savings attributable to owning the intangible assets.  

For certain transactions that were considered asset acquisitions, the Company identified assembled workforce as an 

intangible asset. The Company used the cost approach to value the assembled workforce. The cost approach takes into 
consideration the relevant costs to replace the workforce, which include recruiting and training costs required until the 
employees become fully integrated.  

83 

 
 
The results of operations for each of these acquisitions have been included in the Company’s consolidated 
statements of operations since the date of acquisition. Revenue and loss from operations arising from the acquisitions 
completed in 2013 that are included in the Company’s consolidated statements of operations for 2013 were $9.6 million 
and $42.3 million, respectively.  

The following summary of unaudited pro forma results of operations of the Company for the years ended 
December 31, 2013 and 2012 is presented using the assumption that the business combinations made in 2013 were 
completed as of January 1, 2012. These pro forma results of the Company have been prepared for comparative purposes 
only and do not purport to be indicative of the results of operations which would have resulted had the acquisitions 
occurred as of January 1, 2012, nor is it indicative of future operating results. The pro forma results presented include 
amortization charges for acquired intangible assets, adjustments for incremental compensation expense related to the 
post-combination service arrangements entered into with the continuing employees and related tax effects (in thousands):  

Revenue..................................................................................... $
Net loss ......................................................................................  

678,838     $
(667,404 )     

321,639 
(166,026)

Year Ended December 31, 
2012 
2013

(Unaudited) 

2012 Acquisitions  

In January 2012, the Company acquired 100% of the equity interest of Dasient, Inc. (“Dasient”), a privately-held 

company based in Sunnyvale, California which provided Internet security services to protect advertising networks from 
malicious ads. The acquisition of Dasient has been accounted for as a business combination. The purchase price of 
$19.1 million ($0.1 million in cash and $19.0 million in the Company’s Class A junior preferred stock) was allocated as 
follows: $7.7 million to developed technology, $0.8 million to assets acquired and $1.4 million to liabilities assumed based 
on their estimated fair value on the acquisition date, and the excess $12.0 million of the purchase price over the fair value 
of net assets acquired was recorded as goodwill. This goodwill is primarily attributable to the Company’s ability to further 
enhance the security of its web platform from malware and other online abuses, its ability to more effectively identify and 
monitor fraudulent accounts or activities on its platform and the value of acquired talent. Goodwill is not deductible for U.S. 
income tax purposes. Developed technology was amortized on a straight-line basis over its estimated useful life of 12 
months.  

In 2012, the Company acquired nine additional companies. These acquisitions, which were not individually 

significant, were accounted for as business combinations. The total purchase price for these acquisitions of $33.1 million 
(paid with the Company’s common stock and Class A junior preferred stock valued at approximately $28.1 million and 
cash consideration of $5.0 million) was primarily allocated as follows: $8.3 million to developed technology and 
$4.7 million, of which $3.5 million is cash acquired, to net assets acquired based on their estimated fair value on the 
acquisition date, and the excess $20.1 million of the purchase price over the fair value of net assets acquired was 
recorded as goodwill. Goodwill recorded in relation to these acquisitions is primarily attributable to expected synergies and 
the value of acquired assembled workforce. Five of the acquisitions resulted in tax-deductible goodwill of $10.0 million for 
U.S. income tax purposes. Developed technology was amortized on a straight-line basis over their estimated useful life of 
12 months.  

Under the terms of the acquisitions, the Company has the right to the return of a fixed number of shares issued to 
non-employee investors if specified performance conditions tied to certain key employees’ continued employment at the 
Company for one year after the acquisition are not met. The fair value of these contingently returnable shares of 
approximately $4.0 million and $3.0 million for Class A junior preferred stock and common stock issued, respectively, was 
included in the purchase price and classified as part of redeemable convertible preferred stock and stockholders’ equity 
(deficit), respectively, on the consolidated balance sheets. The Company believes that the performance condition will be 
fully satisfied for these shares. As of December 31, 2014, none of the consideration has been returned to the Company.  

In relation to the 2012 acquisitions, the Company also agreed to pay up to $28.5 million of cash and equity 

consideration contingent upon the continued employment with the Company of certain employees of the acquired entities. 
The Company recognizes compensation expense related to these consideration over the requisite service periods of up to 
48 months from the respective acquisition dates on a straight-line basis.  

84 

 
 
  
  
 
   
  
The results of operations for each of these acquisitions have been included in the Company’s consolidated 
statements of operations since the date of acquisition. Revenue and loss from operations arising from the acquisitions 
completed in 2012 that are included in the Company’s consolidated statements of operations for 2012 were zero and 
$26.9 million, respectively.  

The following summary of unaudited pro forma results of operations of the Company for the years ended 

December 31, 2012 and 2011 is presented using the assumption that the acquisitions made in 2012 were completed as of 
January 1, 2011. These pro forma results of the Company have been prepared for comparative purposes only and do not 
purport to be indicative of the results of operations which would have resulted had the acquisitions occurred as of 
January 1, 2011, nor is it indicative of future operating results. The pro forma results presented include amortization 
charges for acquired intangible assets, adjustments for incremental compensation expense related to the post-
combination service arrangements entered into with the continuing employees and related tax effects (in thousands):  

Revenue..................................................................................... $
Net loss ......................................................................................  

316,933     $
(70,200 )     

106,313 
(166,317)

Year Ended December 31, 
2011 
2012

(Unaudited) 

Note 9. Convertible Notes 

In September 2014, the Company issued $900.0 million principal amount of 2019 Notes and $900.0 million principal 

amount of 2021 Notes in a private placement to qualified institutional buyers pursuant to Rule144A under the Securities 
Act of 1933, as amended. In October 2014, pursuant to the exercise of the overallotment option by the initial purchasers, 
the Company issued an additional $35.0 million principal amount of 2019 Notes and $54.0 million principal amount of 
2021 Notes. The total net proceeds from this offering were approximately $1.86 billion, after deducting $28.3 million of 
initial purchasers’ discount and $0.5 million debt issuance costs in connection with the 2019 Notes and the 2021 Notes.  

The interest rates are fixed at 0.25% and 1.00% per annum and are payable semi-annually in arrears on March 15 

and September 15 of each year, commencing on March 15, 2015.  During the year ended December 31, 2014, the 
Company recognized $1.4 million of interest expense related to the amortization of initial purchasers’ discount and debt 
issuance costs, and $3.3 million of accrued coupon interest expense. These interest expenses are recorded in interest 
income (expense), net in the consolidated statements of operations. 

Each $1,000 of principal of these notes will initially be convertible into 12.8793 shares of the Company’s common 

stock, which is equivalent to an initial conversion price of approximately $77.64 per share, subject to adjustment upon the 
occurrence of specified events.  Holders of these notes may convert their notes at their option at any time until close of 
business on the second scheduled trading day immediately preceding the relevant maturity date which is March 15, 2019 
for the 2019 Notes and March 15, 2021 for the 2021 Notes.  Further, holders of each of these notes may convert their 
notes at their option prior to the respective dates above, only under the following circumstances:  

1) 

2) 

during any calendar quarter commencing after the calendar quarter ending on December 31, 2014 (and 
only during such calendar quarter), if the last reported sale price of Twitter’s common stock for at least 20 
trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the 
last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the 
conversion price for the relevant series of notes on each applicable trading day; 

during the five business day period after any five consecutive trading day period (the “measurement 
period”) in which the trading price (as defined in the related Indenture) per $1,000 principal amount of 
2019 notes or 2021 notes, as applicable, for each trading day of the measurement period was less than 
98% of the product of the last reported sale price of Twitter’s common stock and the conversion rate for 
the notes of the relevant series on each such trading day; or  

3) 

upon the occurrence of certain specified corporate events. 

85 

 
 
 
  
  
     
  
  
 
Upon conversion of the 2019 Notes and 2021 Notes, the Company will pay or deliver, as the case may be, cash, 
shares of its common stock or a combination of cash and shares of its common stock, at the Company’s election. If the 
Company satisfies its conversion obligation solely in cash or through payment and delivery, as the case may be, of a 
combination of cash and shares of its common stock, the amount of cash and shares of common stock, if any, due upon 
conversion will be based on a daily conversion value (as described herein) calculated on a proportionate basis for each 
trading day in a 30 trading day observation period.  

If a fundamental change (as defined in the relevant indenture governing the applicable series of Notes) occurs prior 
to the maturity date, holders of the 2019 Notes and 2021 Notes may require the Company to repurchase all or a portion of 
their notes for cash at a repurchase price equal to 100% of the principal amount of the notes, plus any accrued and 
unpaid interest to, but excluding, the repurchase date. In addition, if specific corporate events occur prior to the applicable 
maturity date, the Company will be required to increase the conversion rate for holders who elect to convert their notes in 
certain circumstances.  

In accordance with accounting guidance on embedded conversion features, the Company valued and bifurcated the 

conversion option associated with the 2019 Notes and 2021 Notes from the respective host debt instrument, which is 
referred to as debt discount, and initially recorded the conversion option of $222.8 million for the 2019 Notes and 
$283.3 million for the 2021 Notes in stockholders’ equity. The resulting debt discounts on the 2019 Notes and 2021 Notes 
are being amortized to interest expense at an effective interest rate of 5.75% and 6.25%, respectively, over the 
contractual terms of the notes. The Company allocated $0.1 million of debt issuance costs to the equity component, and 
the remaining debt issuance costs of $0.4 million are being amortized to interest expense.  

During the year ended December 31, 2014, the Company recognized $18.8 million of interest expense related to the 

amortization of the debt discount. This interest expense is recorded in interest income (expense), net in the consolidated 
statements of operations. As of December 31, 2014, the net carrying value, net of the initial purchasers’ discount and debt 
discount, of 2019 Notes and 2021 Notes was $709.9 million and $666.1 million, respectively.  

The Notes consisted of the following (in thousands): 

Principal amounts: 

Principal ...................................................................................................  $
Unamortized initial purchasers' discount and debt discount (1) ...............   
Net carrying amount ................................................................................  $
Carrying amount of the equity component (2) ...........................................  $

935,000     $ 
(225,104 )     
709,896     $ 
222,826     $ 

954,000 
(287,876)
666,124 
283,283 

December 31, 2014 

2019 Notes 

2021 Notes 

 (1) 

(2) 

Included in the consolidated balance sheets within convertible notes and amortized over the remaining lives of the 
Notes. 
Included in the consolidated balance sheets within additional paid-in capital. 

As of December 31, 2014, the remaining life of the 2019 Notes and 2021 Notes is approximately 56 months and 80 

months, respectively. 

Concurrently with the offering of these notes in September and October 2014, the Company entered into convertible 

note hedge transactions with certain bank counterparties whereby the Company has the option to purchase initially 
(subject to adjustment for certain specified events) a total of approximately 24.3 million shares of its common stock at a 
price of approximately $77.64 per share. The total cost of the convertible note hedge transactions was $407.2 million. In 
addition, the Company sold warrants to certain bank counterparties whereby the holders of the warrants have the option 
to purchase initially (subject to adjustment for certain specified events) a total of approximately 24.3 million shares of the 
Company’s common stock at a price of $105.28. The Company received $289.3 million in cash proceeds from the sale of 
these warrants.  

86 

 
 
 
 
 
   
      
        
 
  
Taken together, the purchase of the convertible note hedges and the sale of warrants are intended to offset any 

actual dilution from the conversion of these notes and to effectively increase the overall conversion price from $77.64 to 
$105.28 per share. As these transactions meet certain accounting criteria, the convertible note hedges and warrants are 
recorded in stockholders’ equity and are not accounted for as derivatives. The net cost incurred in connection with the 
convertible note hedge and warrant transactions was recorded as a reduction to additional paid-in capital in the 
consolidated balance sheet as of December 31, 2014. 

Note 10. Net Loss per Share  

The Company computes net loss per share of common stock in conformity with the two-class method required for 

participating securities. The Company considers the shares issued upon the early exercise of stock options subject to 
repurchase to be participating securities, because holders of such shares have non-forfeitable dividend rights in the event 
a dividend is paid on common stock. Prior to their conversion to common stock, the Company also considered all series of 
the Company’s redeemable convertible preferred stock and convertible preferred stock to be participating securities as the 
holders of the preferred stock were entitled to receive a noncumulative dividend on a pari passu basis in the event that a 
dividend was paid on common stock. The holders of all series of convertible preferred stock and the holders of early 
exercised shares subject to repurchase do not have a contractual obligation to share in the losses of the Company. As 
such, the Company’s net losses for the years ended December 31, 2014, 2013 and 2012 were not allocated to these 
participating securities.  

Basic net loss per share is computed by dividing total net loss attributable to common stockholders by the weighted-
average common shares outstanding. The weighted-average common shares outstanding is adjusted for shares subject 
to repurchase such as unvested restricted stock granted to employees in connection with acquisitions, contingently 
returnable shares and escrowed shares supporting indemnification obligations that are issued in connection with 
acquisitions and unvested stock options exercised. Diluted net loss per share is computed by dividing the net loss 
attributable to common stockholders by the weighted-average number of common shares outstanding including potential 
dilutive common stock instruments. In the years ended December 31, 2014, 2013 and 2012, the Company’s potential 
common stock instruments such as stock options, RSUs, shares to be purchased under the Employee Stock Purchase 
Plan, shares subject to repurchases and the warrants were not included in the computation of diluted loss per share as 
the effect of including these shares in the calculation would have been anti-dilutive.  

The following table presents the calculation of basic and diluted net loss per share for periods presented (in 

thousands, except per share data).  

Net loss 
Basic shares: 

Year Ended December 31, 
2013 
(645,323 )   $ 

2014 
(577,820)   $

  $

2012 
(79,399)

Weighted-average common shares 
outstanding ........................................................ 
Weighted-average restricted stock 
   subject to repurchase .....................................    
Weighted-average shares used to compute 
   basic net loss per share ..................................    

Diluted shares: 

Weighted-average shares used to compute 
   diluted net loss per share ................................    

Net loss per share attributable to common 
stockholders: 

613,944

196,675 

120,845

(8,954)    

(7,165 )     

(3,444)

604,990     

189,510       

117,401 

604,990     

189,510       

117,401 

Basic ..................................................................   $
Diluted ................................................................   $

(0.96)   $
(0.96)   $

(3.41 )   $ 
(3.41 )   $ 

(0.68)
(0.68)

87 

 
 
 
 
 
  
 
 
  
 
 
 
     
 
   
     
       
 
   
     
      
 
   
     
       
 
   
     
 
      
 
 
The following number of potential common shares at the end of each period were excluded from the calculation of 
diluted net loss per share attributable to common stockholders because their effect would have been anti-dilutive for the 
periods presented (in thousands):  

RSUs .......................................................................    
Warrants .................................................................    
Stock options ..........................................................    
Shares subject to repurchase .................................    
Employee stock purchase plan ...............................    

Year Ended December 31, 
2013  

2012 

2014  

64,135     
24,329     
20,420     
8,051     
1,284     

95,723       
117       
42,246       
10,986       
1,896       

42,526 
117 
48,787 
4,237 
— 

Since the Company expects to settle the principal amount of the outstanding Notes in cash, the Company uses the 

treasury stock method for calculating any potential dilutive effect of the conversion spread on diluted net income per 
share, if applicable.  The conversion spread of 24.3 million shares will have a dilutive impact on diluted net income per 
share of common stock when the average market price of the Company’s common stock for a given period exceeds the 
conversion price of $77.64 per share for the Notes. 

If the average market price of the common stock exceeds the exercise price of the warrants, $105.28, the warrants 

will have a dilutive effect on the earnings per share assuming that the Company is profitable.  Since the average market 
price of the common stock is below $105.28, the warrants are anti-dilutive. 

Note 11. Preferred Stock  

Prior to the initial public offering, the Company had outstanding 3.5 million shares of Class A junior preferred stock.  

Immediately prior to the closing of the Company’s initial public offering on November 13, 2013, all shares of outstanding 
redeemable convertible preferred stock were automatically converted to 3.5 million shares of the Company’s common 
stock. 

Prior to the initial public offering, the Company also had outstanding 77.0 million shares designated as Series A 

convertible preferred stock, 49.3 million shares designated as Series B convertible preferred stock, 62.8 million shares 
designated as Series C convertible preferred stock, 51.0 million shares designated as Series D convertible preferred 
stock, 38.4 million shares designated as Series E convertible preferred stock, 26.2 million shares designated as Series F 
convertible preferred stock and 24.9 million shares designated as Series G convertible preferred stock.  Each share of 
preferred stock was convertible to one share of common stock.  Upon the closing of the Company’s initial public offering 
on November 13, 2013, all shares of outstanding redeemable convertible preferred stock were automatically converted to 
329.6 million shares of the Company’s common stock. 

The Company has the authority to issue up to 200,000,000 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. As of December 31, 2014 and 2013, there was no preferred stock outstanding. 

Note 12. Common Stock and Stockholders’ Equity (Deficit)  
Common Stock  

As of December 31, 2014, the Company is authorized to issue 5.0 billion shares of $0.000005 par value common 

stock in accordance with the Certificate of Incorporation, as amended and restated.  

Each share of common stock is entitled to one vote. The holders of common stock are also entitled to receive 
dividends whenever funds are legally available and when and if declared by the Board of Directors, subject to the prior 
rights of holders of all classes of stock outstanding. As of December 31, 2014, no dividends have been declared.  

88 

 
 
 
  
 
 
  
 
 
  
 
 
 
 
 
 
Restricted Common Stock  

The Company has granted restricted common stock to certain continuing employees in connection with the 
acquisitions. Vesting of this stock is dependent on the respective employee’s continued employment at the Company 
during the requisite service period, which is generally two to four years from the issuance date, and the Company has the 
right to repurchase the unvested shares upon termination of employment. The fair value of the restricted common stock 
issued to employees is recorded as compensation expense on a straight-line basis over the requisite service period.  

The activities for the restricted common stock issued to employees for the year ended December 31, 2014 are 

summarized as follows (in thousands, except per share data):  

Unvested restricted common stock at December 31, 2013 ..........   
Granted .....................................................................................   
Vested .......................................................................................   
Canceled ...................................................................................   
Unvested restricted common stock at December 31, 2014 ..........   

Number of 

    Weighted-Average  
    Grant-Date Fair 

Shares 

    Value Per Share 

6,866     $ 
2,468     $ 
(3,956 )   $ 
(423 )   $ 
4,955     $ 

17.60 
33.80 
17.68 
17.31 
25.62 

In the years ended December 31, 2014, 2013 and 2012, the Company recorded $63.9 million, $31.7 million and 

$6.3 million, respectively, of compensation expense related to restricted common stock issued to employees. As of 
December 31, 2014, there was $93.5 million of unamortized stock-based compensation expense related to restricted 
common stock issued which is expected to be recognized over a weighted-average period of 2.43 years.  

Equity Incentive Plans  

The Company’s 2013 Equity Incentive Plan became effective upon the completion of the Company’s initial public 

offering and serves as the successor to the 2007 Equity Incentive Plan. Initially, 68.3 million shares were reserved under 
the 2013 Equity Plan and any shares subject to options or other similar awards granted under the 2007 Equity Incentive 
Plan that expire, are forfeited, are repurchased by the Company or otherwise terminate unexercised will become available 
under the 2013 Equity Incentive Plan. The number of Shares available for issuance under the 2013 Equity Incentive Plan 
will be increased on the first day of each fiscal year beginning with the 2014 fiscal year, in an amount equal to the least of 
(i) 60,000,000 Shares, (ii) 5% of the outstanding Shares on the last day of the immediately preceding fiscal year or (iii) 
such number of Shares determined by the Company’s Board of Directors.  As of December 31, 2014, the total number of 
options and RSUs outstanding under the 2013 Equity Incentive Plan was 23.9 million shares, and 81.8 million shares 
were available for future issuance.  There were 59.1 million shares of options and RSUs outstanding under the 2007 
Equity Incentive Plan as of December 31, 2014. No additional shares will be issued under the 2007 Equity Incentive Plan. 
Options granted under the Company’s Equity Incentive Plans generally expire 10 years after the grant date.  The 
Company issues new shares to satisfy stock option exercises.   

Under the 2007 Equity Incentive Plan, RSUs granted to domestic and international employees prior to February 

2013 (“Pre-2013 RSUs”) vest upon the satisfaction of both a service condition and a performance condition. The service 
condition for these awards is generally satisfied over four years. RSUs granted to domestic employees starting in 
February 2013 (“Post-2013 RSUs”) are not subject to a performance condition in order to vest. The majority of Post-2013 
RSUs vest over a service period of four years. Pursuant to the terms of the 2007 Equity Incentive Plan and the 2013 
Equity Incentive Plan, the shares underlying Post-2013 RSUs that satisfy the service condition are to be delivered to 
holders no later than the fifteenth day of the third month following the end of the calendar year the service condition is 
satisfied, or if later, the end of the Company’s tax year. The Company undertook a net settlement of vested RSUs held by 
the executive officers upon settlement of their Pre-2013 RSUs in 2014, withheld shares and remitted income tax on behalf 
of the applicable executive officers of $17.1 million in cash at the applicable minimum statutory rates in the year ended 
December 31, 2014.  The shares that were withheld by the Company as a result of the net settlement of RSUs are no 
longer considered issued and outstanding.  

The Company also assumed stock options of acquired entities in connection with certain acquisitions. While the 
respective stock plans were terminated on the closing of each acquisition, they continue to govern the terms of stock 
options assumed in the respective acquisition. As of December 31, 2014, there were an aggregate of 1.6 million 
outstanding stock options assumed in these acquisitions.  

89 

 
 
 
  
 
 
  
 
  
 
  
Employee Stock Purchase Plan 

On November 7, 2013, the Company’s 2013 Employee Stock Purchase Plan (the “ESPP”) became effective. The 

ESPP allows eligible employees to purchase shares of the Company’s common stock at a discount through payroll 
deductions of up to 15% of their eligible compensation, subject to any plan limitations. The ESPP provides for twelve-
month offering periods, and each offering period will include purchase periods, which will be the approximately six-month 
period commencing with one exercise date and ending with the next exercise date.  Employees are able to purchase 
shares at 85% of the lower of the fair market value of the Company’s common stock on the first trading day of the offering 
period or on the exercise date.  The number of shares available for sale under the 2013 Employee Stock Purchase Plan 
will be increased annually on the first day of each fiscal year, equal to the least of i) 11.3 million shares; ii) 1% of the 
outstanding shares of the Company’s common stock as of the last day of the immediately preceding fiscal year; or iii) 
such other amount as determined by the Board of Directors. 

During the year ended December 31, 2014, employees purchased an aggregate of 1.9 million shares under this plan 

at a weighted average price of $22.47 per share. As of December 31, 2014, 15.8 million shares were available for future 
issuance under the ESPP. During the years ended December 31, 2014 and 2013, the Company recorded $31.8 million 
and $5.4 million of stock-based compensation expense, respectively, related to the ESPP. 

Stock Option Activity  

A summary of stock option activity for the year ended December 31, 2014 is as follows (in thousands, except years 

and per share data):  

Options Outstanding 

    Weighted- 

Weighted- 

Average 

Average 

    Remaining 

Number of 

Exercise 

   Contractual Life       Aggregate 

Outstanding at December 31, 2013 

Options granted ...........................................   
Options assumed in connection with 
acquisitions .................................................. 
Options exercised ........................................ 
Options canceled ......................................... 
Outstanding at December 31, 2014 .................   
Vested and expected to vest at 
   December 31, 2014 (1) ................................... 
Exercisable at December 31, 2014 ..................   

Shares 

  Price Per Share    

42,246 $
500 $

819 $
(22,447) $
(698) $
20,420 $

20,097 $
17,295 $

1.89
42.05

1.60
1.29
7.27
3.33

3.18
1.65

(in years) 

     Intrinsic Value  
6.47   $ 2,609,295 

5.78   $

667,538 

5.75   $
5.44   $

659,695 
591,755 

(1) 

The expected to vest options are the result of applying pre-vesting forfeiture rate assumptions to unvested options 
outstanding.  

The aggregate intrinsic value in the table above represents the difference between the fair value of common stock 

and the exercise price of outstanding, in-the-money stock options.  

The total intrinsic values of stock options exercised in the years ended December 31, 2014, 2013 and 2012 were 

$872.8 million, $123.7 million and $84.6 million, respectively.  

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RSU Activity  

The following table summarizes the activity related to the Company’s Pre-2013 and Post-2013 RSUs for the year 

ended December 31, 2014.  For purposes of this table, vested RSUs represent the shares for which the service condition 
had been fulfilled as of each respective date (in thousands, except per share data):  

RSUs Outstanding 

Weighted- 

      Average Grant- 

      Date Fair Value 

Shares 

Per Share 

Unvested and outstanding at December 31, 2013 ..................   
Granted ...............................................................................   
Vested .................................................................................   
Canceled .............................................................................   
Unvested and outstanding at December 31, 2014 ..................   

79,876      $ 
24,409      $ 
(26,903 )    $ 
(13,247 )    $ 
64,135      $ 

19.54 
48.49 
21.34 
23.02 
29.08 

The total fair value of RSUs vested during the year ended December 31, 2014  was approximately $1.13 billion.  In 

addition, the total fair value of Pre-2013 RSUs vested during the year ended December 31, 2014, for which the service 
condition had been fulfilled prior to January 1, 2014, was approximately $888.1 million. 

Stock-Based Compensation Expense  

Stock-based compensation expense is allocated based on the cost center to which the award holder belongs. Total 
stock-based compensation expense by function for the years ended December 31, 2014, 2013 and 2012 is as follows (in 
thousands):  

Cost of revenue .......................................................................   $
Research and development.....................................................    
Sales and marketing ................................................................    
General and administrative......................................................    
Total ......................................................................................   $

50,536     $
360,726      
157,263      
63,072      
631,597     $

50,942      $ 
379,913        
114,440        
55,072        
600,367      $ 

800 
12,622 
1,346 
10,973 
25,741 

2014 

Year Ended December 31, 
2013 

2012 

Upon completion of the Company’s initial public offering in November 2013, the Company began recording stock-
based compensation expense related to Pre-2013 RSUs because the satisfaction of the performance condition for vesting 
became probable.  During the year ended December 31, 2013, the amount of stock-based compensation expense 
recorded in relation to Pre-2013 RSUs totaled approximately $433.5 million and was comprised of $405.9 million of 
expense accumulated until the effective date of the initial public offering for awards vested and $27.6 million of 
subsequent recognition of expense during the year as additional Pre-2013 RSUs continued to vest. During the year ended 
December 31, 2014, the Company recorded $84.4 million of expense in relation to Pre-2013 RSUs as the stock-based 
compensation continued to be amortized for outstanding Pre-2013 RSUs on an accelerated basis. 

The Company modified the terms of stock options and RSUs for certain employees upon their termination or change 

in employment status. The Company recorded incremental stock-based compensation in relation to the modification of 
stock-based awards of approximately $32.6 million in the year ended December 31, 2014. The amount of incremental 
stock-based compensation recorded in relation to the modification of stock-based awards was not material for the years 
ended December 31, 2013 and 2012, respectively. 

Income tax benefits recognized for stock-based compensation arrangements during the years ended December 31, 

2014, 2013 and 2012 were not material. 

The Company capitalized $40.8 million, $13.6 million and $1.3 million of stock-based compensation expense 
associated with the cost for developing software for internal use in the years ended December 31, 2014, 2013 and 2012, 
respectively.  

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The weighted-average grant-date fair value of stock options granted to employees and assumed in connection with 

acquisitions in the years ended December 31, 2014, 2013 and 2012 was $30.12, $11.89 and $7.42 per share, 
respectively. The fair value of stock options granted to employees was determined using the Black-Scholes option pricing 
model with the following weighted-average assumptions:  

Expected dividend yield .......................................................    
Risk-free interest rate ..........................................................    
Expected volatility ................................................................    
Expected term (in years) .....................................................    

—      
1.47%   
42.54%   
4.73      

—        
1.24 %     
52.14 %     
5.37        

—  
1.30%
51.79%
6.56  

2014 

Year Ended December 31, 
2013 

2012 

As of December 31, 2014, there was $33.3 million of unamortized stock-based compensation expense related to 
unvested stock options granted to employees and non-employee service providers which is expected to be recognized 
over a weighted-average period of 2.25 years. The unamortized stock-based compensation expense related to Pre-2013 
and Post-2013 RSUs of $48.6 million and $1.26 billion, respectively, as of December 31, 2014 is expected to be 
recognized over a weighted-average period of 1.79 years and 2.91 years, respectively. An amount of $15.4 million of 
unamortized stock-based compensation expense related to the ESPP is expected to be recognized over a period of 0.85 
years.  

Note 13. Income Taxes  

The domestic and foreign components of pre-tax loss for the years ended December 31, 2014, 2013 and 2012 are 

as follows (in thousands):  

Domestic .................................................................................  $
Foreign ....................................................................................   
Loss before income taxes .......................................................  $

2014 
(164,854)   $
(413,497)    
(578,351)   $

Year Ended December 31, 
2013 
(549,397 )   $ 
(97,749 )     
(647,146 )   $ 

2012 

(53,699)
(25,471)
(79,170)

The components of the provision (benefit) for income taxes for the years ended December 31, 2014, 2013 and 2012 

are as follows (in thousands):  

Current: 

Federal ...............................................................................  $
State ..................................................................................   
Foreign ...............................................................................    
Total current provision for income taxes ......................    

Deferred: 

Federal ...............................................................................    
State ..................................................................................   
Foreign ...............................................................................   
Total deferred benefit for income taxes ........................    
Provision (benefit) for income taxes .......................................   $

2014 

Year Ended December 31, 
2013 

2012 

—    $
720     
8,358     
9,078     

(8,972)    
(128)    
(509)    
(9,609)    
(531)   $

—     $ 
857       
6,222       
7,079       

(5,412 )     
(453 )     
(3,037 )     
(8,902 )     
(1,823 )   $ 

— 
(300)
1,627 
1,327 

(608)
(89)
(401)
(1,098)
229 

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The following is a reconciliation of the statutory federal income tax rate to the Company’s effective tax rate for the 

years ended December 31, 2014, 2013 and 2012:  

Tax at federal statutory rate....................................................  
State taxes, net of federal benefit ...........................................  
Stock-based compensation ....................................................  
Research and development credits ........................................  
Valuation Allowance ...............................................................  
Nondeductible expenses ........................................................  
Foreign rate differential ...........................................................  
Change in tax positions ..........................................................  
Other .......................................................................................  
Effective tax rate .....................................................................  

2014 

Year Ended December 31, 
2013 

2012 

35.0%  
(0.1)    
(4.2)    
25.2     
(9.4)    
(4.5)    
(26.4)    
(15.9)    
0.4     
0.1%  

35.0 %     
(0.1 )      
(2.9 )      
3.6        
(25.0 )      
(3.0 )      
(5.8 )      
(2.0 )      
0.5        
0.3 %     

35.0%
0.5  
(1.9) 
—  
(10.1) 
(8.7) 
(12.7) 
(2.8) 
0.4  
(0.3)%

The tax effects of temporary differences and related deferred tax assets and liabilities as of December 31, 2014 and 

2013 are as follows (in thousands):  

Deferred tax assets: 

Net operating loss carryforwards ...........................................................  $
Accruals and reserves ...........................................................................   
Stock-based compensation expense ....................................................   
Research and development credits .......................................................   
California Enterprise Zone Credit ..........................................................   
Other ......................................................................................................   
Total deferred tax assets ..................................................................   
Valuation allowance ...............................................................................   
Total deferred tax assets, net of valuation allowance ................................   
Deferred tax liabilities: 

Fixed assets and intangible assets .......................................................   
Convertible notes ...................................................................................   
Other ......................................................................................................   
Total deferred tax liabilities ...............................................................   
Net deferred tax assets ..............................................................................  $

December 31, 

2014 

2013 

230,417     $ 
20,496       
89,159       
168,934       
10,355       
3,145       
522,506       
(351,249 )     
171,257       

(132,671 )     
(35,133 )     
(420 )     
(168,224 )     
3,033     $ 

82,719 
11,435 
195,338 
28,572 
8,163 
1,131 
327,358 
(227,878)
99,480 

(80,072)
— 
(457)
(80,529)
18,951 

Based on the available objective evidence, management believes it is more-likely-than-not that the net U.S. deferred 
tax assets were not fully realizable as of the year ended December 31, 2014. Accordingly, the Company has established a 
full valuation allowance against its U.S. deferred tax assets. As of December 31, 2014, the Company has net $3.2 million 
of deferred tax assets in foreign jurisdictions which it believes are more-likely-than-not to be fully realized given the 
expectation of future earnings in these jurisdictions.  

For the year ended December 31, 2014, the Company has not provided for income taxes on $42.9 million of its 
undistributed earnings for certain foreign subsidiaries because these earnings are intended to be permanently reinvested 
in operations outside the U.S. Determining the unrecognized deferred tax liabilities associated with these earnings is not 
practicable.  

At December 31, 2014, the Company had $2.60 billion of federal and $1.00 billion of state net operating loss 
carryforwards available to reduce future taxable income, which will begin to expire in 2027 for federal and 2015 for state 
tax purposes.  

Pursuant to authoritative guidance, the excess tax benefit from stock-based compensation will only be recorded to 
stockholders’ equity when cash taxes payable are reduced. As of December 31, 2014, the portion of net operating loss 
carryforwards related to the excess tax benefit from stock-based compensation is approximately $2.49 billion, the benefit 
of which will be credited to additional paid-in capital when realized.   

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The Company also has research credit carryforwards of $175.9 million and $142.0 million for federal and state 

income tax purposes, respectively. The federal credit carryforward will begin to expire in 2027. The state research tax 
credits have no expiration date. Additionally, the Company has California Enterprise Zone Credit carryforwards of $15.9 
million which will begin to expire in 2023.  

Utilization of the net operating loss carryforwards and credits may be subject to an annual limitation due to the 
ownership change limitations provided by the Internal Revenue Code of 1986, as amended (the “Code”), and similar state 
provisions. Any annual limitation may result in the expiration of net operating losses and credits before utilization.  

As of December 31, 2014, the unrecognized tax benefit was $182.5 million, materially all of which would result in 

corresponding adjustments to valuation allowance. A reconciliation of the beginning and ending amount of unrecognized 
tax benefit is as follows (in thousands):  

Balance at the beginning of the year .........................................   $
Additions related to prior year tax positions ..............................    
Reductions related to prior year tax positions ...........................    
Additions related to current year tax positions ..........................    
Balance at the end of the year ..................................................   $

43,061    $
—     
(50)    
139,473     
182,484    $

23,352     $ 
7,880       
—       
11,829       
43,061     $ 

25,845 
— 
(3,612)
1,119 
23,352 

Year Ended December 31, 
2013 

2014 

2012 

Total unrecognized tax benefits are recorded on the Company’s consolidated balance sheets as follows (in 

thousands):  

Total unrecognized tax benefits balance ....................................................   $
Amounts netted against related deferred tax assets ..................................    
Unrecognized tax benefits recorded on consolidated balance sheets .......   $

182,484     $ 
(181,786 )     
698     $ 

43,061 
(27,160)
15,901 

December 31, 

2014 

2013 

The net unrecognized tax benefit of $0.7 million and $15.9 million as of December 31, 2014 and 2013, respectively, 

was included in the deferred and other long-term tax liabilities, net on the Company’s consolidated balance sheets. The 
Company adopted new guidance on the financial statement presentation of unrecognized tax benefits prospectively as of 
January 1, 2014. The application of this guidance resulted in a $15.8 million decrease in net deferred tax assets and the 
related liability for unrecognized tax benefits upon adoption. The Company does not believe that its unrecognized tax 
benefits will significantly change within the next 12 months.  

The Company recognizes interest and/or penalties related to income tax matters as a component of income tax 

expense. As of December 31, 2014 there were no significant accrued interest and penalties related to uncertain tax 
positions.  

The Company is subject to taxation in the United States and various state and foreign jurisdictions. Earnings from 
non-US activities are subject to local country income tax. The material jurisdictions in which the Company is subject to 
potential examination by taxing authorities include the United States, California and Ireland. The Company is currently 
under a Federal income tax examination by the Internal Revenue Service (IRS) for tax years 2011 and 2012 and under 
examination in California for tax years 2010 and 2011. The Company believes that adequate amounts have been 
reserved in these jurisdictions. The Company’s 2007 to 2014 tax years remain subject to examination by the United 
States and California, and its 2011 to 2014 tax years remain subject to examination in Ireland. The Company remains 
subject to possible examination in various other jurisdictions that are not expected to result in material tax adjustments.  

94 

 
 
  
  
 
 
  
 
   
 
  
  
  
 
 
  
 
   
 
      
 
 
Note 14. Commitments and Contingencies  
Credit Facility  

The Company entered into a revolving credit agreement with certain lenders in 2013, which provided for a 

$1.0 billion revolving unsecured credit facility maturing on October 22, 2018. Loans under the credit facility bear interest, 
at the Company’s option, at (i) a base rate based on the highest of the prime rate, the federal funds rate plus 0.50% and 
an adjusted LIBOR rate for a one-month interest period plus 1.00%, in each case plus a margin ranging from 0.00% to 
0.75% or (ii) an adjusted LIBOR rate plus a margin ranging from 1.00% to 1.75%. This margin is determined based on the 
total leverage ratio for the preceding four fiscal quarter period. The Company is obligated to pay other customary fees for 
a credit facility of this size and type, including an upfront fee and an unused commitment fee. Obligations under the credit 
facility are guaranteed by one of the Company’s wholly-owned subsidiaries. In addition, the credit facility contains 
restrictions on payments including cash payments of dividends. 

The revolving credit agreement was amended in September 2014 to increase the amount of indebtedness that the 
Company may incur and increase the amount of restricted payments that the Company may make. This amendment to 
the revolving credit agreement also provides that if the Company’s total leverage ratio exceeds 2.5:1.0 and if the amount 
outstanding under the credit facility exceeds $500.0 million, or 50% of the amount that may be borrowed under the credit 
facility, the credit facility will become secured by substantially all of the Company’s and certain of its subsidiaries’ assets, 
subject to limited exceptions. As of December 31, 2014, no amounts were drawn under the credit facility.  

Operating and Capital Leases  

The Company has entered into various non-cancelable operating lease agreements for certain offices and data 

center facilities with contractual lease periods expiring between 2015 and 2026. In 2014, the Company entered into 
various lease amendments for additional office space for its headquarters through 2026 with a total remaining lease 
commitment of $233.3 million as of December 31, 2014. Under the terms of the lease, as amended, the Company is 
responsible for certain taxes, insurance, maintenance and management expenses.  

In addition, in 2014 the Company entered into a lease agreement for an additional data center facility and lease 
amendments for capacity expansion of existing data center facilities through 2023 and increased the total commitments to 
$464.5 million as of December 31, 2014.   

A summary of gross and net lease commitments as of December 31, 2014 is as follows (in thousands):  

Operating 

Leases 

Capital 

Leases 

Years ending December 31, 
2015 .............................................................................................   $
2016 .............................................................................................    
2017 .............................................................................................    
2018 .............................................................................................    
2019 .............................................................................................    
Thereafter ....................................................................................    
  $

Less: Amounts representing interest ...........................................       
Total capital lease obligation .......................................................       
Less: Short-term portion ..............................................................       
Long-term portion ........................................................................       

110,221      $ 
135,625        
138,663        
134,667        
102,932        
296,371        
918,479        

     $ 

119,771 
81,758 
38,818 
4,159 
— 
— 
244,506 
13,236 
231,270 
112,320 
118,950 

Rent expense under the Company’s operating leases, including co-location arrangements for the Company’s data 

centers, was $73.9 million, $35.4 million and $19.4 million for the years ended December 31, 2014, 2013 and 2012, 
respectively. The Company also had $38.9 million of non-cancelable contractual commitments as of December 31, 2014, 
primarily related to its bandwidth and other services arrangements. These commitments are generally due within one to 
two years.  

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Legal Proceedings  

The Company is currently involved in, and may in the future be involved in, legal proceedings, claims and 
governmental investigations in the normal course of business. Legal fees and other costs associated with such actions 
are expensed as incurred. The Company assesses, in conjunction with its legal counsel, the need to record a liability for 
litigation and contingencies. Litigation accruals are recorded when and if it is determined that a loss related matter is both 
probable and reasonably estimable. Material loss contingencies that are reasonably possible of occurrence, if any, are 
subject to disclosure. As of December 31, 2014, there was no litigation or contingency with at least a reasonable 
possibility of a material loss. No material losses have been recorded during years ended December 31, 2014, 2013 and 
2012 with respect to litigation or loss contingencies.  

Indemnification  

In the ordinary course of business, the Company often includes standard indemnification provisions in its 

arrangements with its customers, partners, suppliers and vendors. Pursuant to these provisions, the Company may be 
obligated to indemnify such parties for losses or claims suffered or incurred in connection with its service, breach of 
representations or covenants, intellectual property infringement or other claims made against such parties. These 
provisions may limit the time within which an indemnification claim can be made. It is not possible to determine the 
maximum potential amount under these indemnification obligations due to the limited history of prior indemnification 
claims and the unique facts and circumstances involved in each particular agreement. The Company has never incurred 
significant expense defending its licensees against third party claims, nor has it ever incurred significant expense under its 
standard service warranties or arrangements with its customers, partners, suppliers and vendors. Accordingly, the 
Company had no liabilities recorded for these provisions as of December 31, 2014 and 2013.  

Note 15. Related Party Transactions  

One of the Company’s directors has a direct ownership interest in a vendor that provides marketing and 

communication services to the Company. For the years ended December 31, 2014 and 2013, no expenses were incurred 
for services rendered.  For the year ended December 31, 2012, the Company incurred $1.9 million of expense for 
services rendered. There was no outstanding payable balance associated with the vendor as of December 31, 2014.  

Note 16. Employee Benefit Plan  

The Company adopted a 401(k) Plan that qualifies as a deferred compensation arrangement under Section 401 of 
the Code. Under the 401(k) Plan, participating employees may defer a portion of their pretax earnings not to exceed the 
maximum amount allowable. The Company has not made any matching contributions to date.  

Note 17. Segment Information and Operations by Geographic Area  

The Company has a single operating segment and reporting unit structure. The Company’s chief operating decision-
maker is the chief executive officer who reviews financial information presented on a consolidated basis, accompanied by 
disaggregated information about revenue by geographic region for purposes of allocating resources and evaluating 
financial performance.  

Revenue  

Revenue by geography is based on the billing addresses of the customers. The following tables set forth revenue by 

services and revenue by geographic area (in thousands):  

2014 

Year Ended December 31, 
2013 
(in thousands) 

2012 

Advertising services ...........................................................    $1,255,688   $ 594,546      $  269,421 
47,512 
Data licensing and other ....................................................   
$1,403,002   $ 664,890      $  316,933 
Total Revenue .............................................................. 

147,314    

70,344        

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Revenue: 

United States .............................................................. 
International ................................................................ 
Total revenue ........................................................... 

  $

945,720   $
457,282    
$ 1,403,002   $

492,320     $  263,917
172,570       
53,016
664,890     $  316,933

Year Ended December 31, 
2013 

2014 

2012 

The United Kingdom accounted for $140.3 million and $66.5 million or 10% and 10% of the total revenue for the 
years ended December 31, 2014 and 2013, respectively. No individual country from the international markets contributed 
in excess of 10% of the total revenue for the year ended December 31, 2012. 

Property and Equipment, net  

The following table sets forth property and equipment, net by geographic area (in thousands):  

Property and equipment, net: 

United States ..................................................................................    $
International ....................................................................................     
Total property and equipment, net ...............................................    $

523,810      $ 
33,209        
557,019      $ 

327,250 
5,412 
332,662 

   December 31, 

     December 31, 

2014 

2013 

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Item 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL 
DISCLOSURE  
None.  

Item 9A. CONTROLS AND PROCEDURES  

Evaluation of Disclosure Controls and Procedures  

Our management, with the participation of our Chief Executive Officer and our Chief Financial Officer, has evaluated 

the effectiveness of our disclosure controls and procedures as of the end of the period covered by this Annual Report on 
Form 10-K. The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the 
Securities Exchange Act of 1934, as amended (the “Exchange Act”), means controls and other procedures of a company 
that are designed to ensure that information required to be disclosed by a company in the reports that it files or submits 
under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC’s 
rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to 
ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange 
Act is accumulated and communicated to the company’s management, including its principal executive and principal 
financial officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required 
disclosure. Management recognizes that any controls and procedures, no matter how well designed and operated, can 
provide only reasonable assurance of achieving their objectives and management necessarily applies its judgment in 
evaluating the cost-benefit relationship of possible controls and procedures. The design of disclosure controls and 
procedures and internal control over financial reporting must reflect the fact that there are resource constraints and that 
management is required to apply judgment in evaluating the benefits of possible controls and procedures relative to their 
costs. Based on such evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that, as of 
December 31, 2014, our disclosure controls and procedures were effective at the reasonable assurance level.  

Changes in Internal Control over Financial Reporting 

There was no change in our internal control over financial reporting identified in connection with the evaluation 

required by Rule 13a-15(d) and 15d-15(d) of the Exchange Act that occurred during quarter ended December 31, 2014 
that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting. 

Management's Report on Internal Control over Financial Reporting  

Our management is responsible for establishing and maintaining adequate internal control over financial reporting 
(as defined in Rule 13a-15(f) under the Exchange Act). Our management conducted an assessment of the effectiveness 
of our internal control over financial reporting based on the criteria established in “Internal Control - Integrated Framework” 
(2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). Based on that 
assessment, our management has concluded that our internal control over financial reporting was effective as of 
December 31, 2014. The effectiveness of the Company’s internal control over financial reporting as of December 31, 2014 
has been audited by PricewaterhouseCoopers LLP, an independent registered public accounting firm, as stated in their 
report which appears herein.  

Item 9B. OTHER INFORMATION  

Relocation Benefits and Vesting Changes  

We have agreed to cover certain costs for Anthony Noto, our Chief Financial Officer, to relocate from Connecticut to 
the San Francisco Bay area.  Following his relocation, we will provide him with a lump sum payment of up to $650,000.00 
to cover the costs associated with: (a) two house hunting trips for him and his family; (b) the sale of his primary residence 
in Connecticut and the purchase of a new residence in the San Francisco Bay area; (c) relocation his automobiles to the 
San Francisco Bay area and temporary living expenses (lodging and meals), and (d) other incidental expenses directly 
attributable to relocation.  As a condition of reimbursement, Mr. Noto will be required to submit to Twitter proof of the costs 
incurred within one year of the initiation of relocation and in accordance with our internal policies.  In addition, we will 
directly pay expenses for moving household goods and travel for Mr. Noto and his family to the San Francisco Bay area. 

98 

 
 
 
 
The Compensation Committee also modified Mr. Noto's on-hire equity grant such that 8/48th of the grant is fully 
vested as of March 1, 2015 to reflect the pro-rated portion of the first vesting attributable to his length of service at Twitter.  
All remaining quarterly vesting remains unchanged.  Mr. Noto has informed us that he has no current plans to sell any of 
his shares of Twitter common stock. If Mr. Noto decides to sell, he is required by our policies to do so pursuant to a 
trading plan intended to comply with the requirements of Rule 10b5-1 of the Securities Exchange Act of 1934, as 
amended.  We do not undertake any obligation to report any 10b5-1 Plans that may be adopted by any of our board 
members or executive officers in the future, or to report any modifications or terminations of any publicly announced plan, 
except to the extent required by law.  

Resignation of Chief Accounting Officer and Appointment of Interim Chief Accounting Officer 

On February 24, 2015, Luca Baratta informed Twitter management and our Audit Committee that he will be stepping 

down as Chief Accounting Officer of the Company on March 2, 2015 after the completion of the filing of our Form 10-K.  
After that date, Mr. Baratta will continue at Twitter in another role and will work with Mr. Noto on a transition of his day-to-
day responsibilities.   

As of March 2, 2015, we have appointed Gordon Lee as our Chief Accounting Officer on an interim basis. Mr. Lee is 

currently our Controller and will serve in both roles in the interim. 

Mr. Lee, 36, has been our Controller since September 2014, and prior to that served in various roles in Finance 

since January 2011. From August 2002 to December 2010, Mr. Lee worked as a Senior Manager at 
PricewaterhouseCoopers LLP.  Mr. Lee received a B.S. in Commerce Accounting from Santa Clara University in June 
2000. 

There are no arrangements or understandings between Mr. Lee and any other persons pursuant to which he was 

selected as Chief Accounting Officer. There are no family relationships between Mr. Lee and the executive officers or 
directors of the Company and no transactions that would require disclosure under Item 404(a) of Regulation S-K.  As of 
the date of this report, no new compensatory arrangements have been entered into with Mr. Lee in connection with his 
appointment as Chief Accounting Officer. To the extent Mr. Lee enters into new compensation arrangements, the material 
terms of such arrangements will be disclosed in a subsequent filing.  

99 

 
 
 
 
Part III 

Item 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE  

The information called for by this item will be set forth in our Proxy Statement for the Annual Meeting of Stockholders 

to be filed with the SEC within 120 days of the fiscal year ended December 31, 2014 and is incorporated herein by 
reference. 

Our board of directors has adopted a code of business conduct and ethics that applies to all of our employees, 

officers and directors, including our Chief Executive Officer, Chief Financial Officer and other executive and senior 
financial officers. The full text of our code of business conduct and ethics is posted on the investor relations page on our 
website which is located at http://investor.twitterinc.com. We will post any amendments to our code of business conduct 
and ethics, or waivers of its requirements, on our website. 

Item 11. EXECUTIVE COMPENSATION  

The information called for by this item will be set forth in our Proxy Statement and is incorporated herein by 

reference. 

Item 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED 
STOCKHOLDER MATTERS  

The information required by this item will be set forth in our Proxy Statement and is incorporated herein by 

reference. 

Item 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE  

The information, if any, required by this item will be set forth in our Proxy Statement and is incorporated herein by 

reference. 

Item 14. PRINCIPAL ACCOUNTING FEES AND SERVICES  

The information required by this item will be set forth in our Proxy Statement and is incorporated herein by 

reference. 

100 

 
 
 
 
 
 
 
 
 
PART IV  

Item 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES  

The following documents are filed as part of this Annual Report on Form 10-K: 

1.  Consolidated Financial Statements 

Our Consolidated Financial Statements are listed in the “Index to Consolidated Financial Statements” under Part 
II, Item 8 of this Annual Report on Form 10-K. 

2.  Financial Statement Schedules 

SCHEDULE II  
VALUATION AND QUALIFYING ACCOUNTS  

FOR THE YEARS ENDED DECEMBER 31, 2014, 2013 AND 2012  

Balance at 
Beginning of 
Year 

Charged to 
Expenses 

Charged/ 
Credited 
to Other 
Accounts 

Balance at 
End of Year 

(In thousands) 

Allowance for Deferred Tax Assets: 
Year ended December 31, 2014 ................................. $
Year ended December 31, 2013 ................................. $
Year ended December 31, 2012 ................................. $

227,878     $
42,175     $
24,895     $

155,111     $ 
180,691     $ 
15,250     $ 

(31,740)    $
5,012     $
2,030     $

351,249
227,878
42,175

Balance at 
Beginning of 
Year 

Additions 
(Reductions) 

Write-off/ 

   Adjustments 

Balance at 
End of Year 

(In thousands) 

Allowance for Doubtful Accounts: 
Year ended December 31, 2014 ................................. $
Year ended December 31, 2013 ................................. $
Year ended December 31, 2012 ................................. $

2,020     $
1,280     $
1,828     $

4,632     $ 
1,557     $ 
1,844     $ 

(1,145)    $
(817)    $
(2,392)    $

5,507
2,020
1,280

All other financial statement schedules have been omitted because they are not required, not applicable, not 
present in amounts sufficient to require submission of the schedule, or the required information is shown in our 
Consolidated Financial Statements or Notes thereto. 

3.  Exhibits 

The documents listed in the Exhibit Index of this Annual Report on Form 10-K are incorporated by reference or 
are filed with this Annual Report on Form 10-K, in each case as indicated therein (numbered in accordance with 
Item 601 of Regulation S-K). 

101 

 
 
 
 
  
 
  
 
   
  
 
  
 
   
  
  
 
   
  
 
  
 
   
  
  
 
 
 
  
 
 
  
 
 
 
  
 
 
  
    
         
         
         
  
    
         
         
         
  
 
   
  
 
     
  
 
   
  
  
 
 
 
  
 
 
  
 
 
 
 
 
  
    
         
         
         
  
     
    
     
    
     
    
     
  
     
    
     
    
     
    
     
 
SIGNATURES  

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly 

caused this annual report on Form 10-K to be signed on its behalf by the undersigned, thereunto duly authorized. 

Date:   March 2, 2015.  

TWITTER, INC. 

By:

/s/ Richard Costolo 
Richard Costolo 
Chief Executive Officer 

POWER OF ATTORNEY 

Each person whose signature appears below constitutes and appoints Richard Costolo and Anthony Noto, and each of 
them, as his or her true and lawful attorney-in-fact and agent, with full power of substitution and  resubstitution, for him or 
her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments to this Annual 
Report on Form 10-K, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the 
Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and 
authority to do and perform each and every act and thing requisite and necessary to be done in connection therewith, as 
fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said 
attorneys-in-fact and agents, or any of them, or their or his substitutes, may lawfully do or cause to be done by virtue 
thereof. 

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following 
persons on behalf of the registrant and in the capacities and on the dates indicated: 

Signature 

/s/ Richard Costolo 
Richard Costolo 

/s/ Anthony Noto 
Anthony Noto 

/s/ Luca Baratta 
Luca Baratta 

/s/ Jack Dorsey 
Jack Dorsey 

/s/ Peter Chernin 
Peter Chernin 

/s/ Peter Currie 
Peter Currie 

/s/ Peter Fenton 
Peter Fenton 

/s/ David Rosenblatt 
David Rosenblatt 

/s/ Marjorie Scardino 
Marjorie Scardino 

/s/ Evan Williams 
Evan Williams 

Title 

Chief Executive Officer and Director  
(Principal Executive Officer) 

Chief Financial Officer  
(Principal Financial Officer) 

Vice President, Finance  
(Principal Accounting Officer) 

Date 

March 2, 2015 

March 2, 2015 

March 2, 2015 

Chairman and Director 

March 2, 2015 

Director 

Director 

Director 

Director 

Director 

Director 

102 

March 2, 2015 

March 2, 2015 

March 2, 2015 

March 2, 2015 

March 2, 2015 

March 2, 2015 

 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 
Number  

Exhibit Description 

Form 

File No. 

Exhibit 

Filing Date 

Incorporated by Reference 

2.1 

  Agreement and Plan of Reorganization 

EXHIBIT INDEX 

among the Registrant, Raptor Merger Inc., 
MoPub Inc. and Fortis Advisors LLC, as 
Stockholders’ Agent, dated as of September 
9, 2013. 

  Restated Certificate of Incorporation of the 

S-1 

333-191552 

2.1 

October 3, 2013 

Registrant. 

S-1/A 

333-191552 

3.2 

October 22, 2013 

  Amended and Restated Bylaws of the 

Registrant. 

  Form of common stock certificate of the 

S-1/A 

333-191552 

3.4 

October 22, 2013 

Registrant. 

S-1/A 

333-191552 

4.1 

October 22, 2013 

  Amended and Restated Investors’ Rights 

Agreement among the Registrant and certain 
holders of its capital stock, amended as of 
October 4, 2013. 

S-1/A 

333-191552 

4.2 

October 15, 2013 

3.1 

3.2 

4.1 

4.2 

4.3 

  Indenture, dated September 17, 2014, 

4.4 

4.5 

4.6 

10.1* 

between Twitter, Inc. and U.S. Bank National 
Association.. 

  Form of Global 0.25% Convertible Senior 
Note due 2019 (included in Exhibit 4.1) 
  Indenture, dated September 17, 2014, 

between Twitter, Inc. and U.S. Bank National 
Association. 

  Form of Global 0.25% Convertible Senior 
Note due 2019 (included in Exhibit 4.3) 

8-K 

8-K 

8-K 

8-K 

001-36164 

4.1 

September 17, 2014

001-36164 

4.2 

September 17, 2014

001-36164 

4.3 

September 17, 2014

001-36164 

4.4 

September 17, 2014

  Form of Indemnification Agreement between 
the Registrant and each of its directors and 
executive officers. 

S-1 

333-191552 

10.1 

October 3, 2013 

10.2* 

  Twitter, Inc. 2013 Equity Incentive Plan and 

related form agreements. 

S-1/A 

333-191552 

10.2 

October 22, 2013 

10.3* 

  Twitter, Inc. 2013 Employee Stock Purchase 

Plan and related form agreements. 

10.4* 

  Twitter, Inc. 2007 Equity Incentive Plan and 

related form agreements. 

10.5* 

10.6* 
10.7* 
10.8* 

10.9* 

  Twitter, Inc. 2011 Acquisition Option Plan. 

  Afterlive.tv Inc. 2010 Stock Plan. 
  Apps & Zerts, Inc. 2013 Stock Plan. 
  Bluefin Labs, Inc. 2008 Stock Plan. 

  CardSpring Inc. Amended and Restated 

2011 Equity Incentive Plan. 

10.10* 

  Crashlytics, Inc. 2011 Stock Plan. 

S-8 

S-1 

S-1 

S-8 
S-8 
S-1 

S-8 
S-1 

10.11* 
10.12* 

  Gnip, Inc. 2008 Incentive Plan, as amended. S-8 
S-1 
  Mixer Labs, Inc. 2008 Stock Plan. 

333-192150 

4.3 

November 7, 2013 

333-191552 

10.4 

October 3, 2013 

333-191552 

10.5 

  October 3, 2013 

333-198055 
333-195743 
333-191552 

333-198055 
333-191552 

333-195743 
333-191552 

4.4 
4.2 
10.6 

4.3 
10.7 

4.3 
10.8 

  August 11, 2014 
  May 6, 2014 
  October 3, 2013 

August 11, 2014 
  October 3, 2013 

  May 6, 2014 
  October 3, 2013 

10.13* 

  MoPub Inc. 2010 Equity Incentive Plan. 

S-1/A 

333-191552 

10.9 

  November 4, 2013 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 
Number  

Exhibit Description 

Form 

File No. 

Exhibit 

Filing Date 

Incorporated by Reference 

10.14* 

  TapCommerce Inc. 2012 Stock Incentive 

Plan. 

10.15* 

  Twitter, Inc. Executive Incentive 

Compensation Plan. 

10.16* 

  Twitter, Inc. Change of Control and 

Involuntary Termination Protection Policy 
Policy. 

10.17* 

  Twitter, Inc. Outside Director Compensation 

Policy 

S-8 

S-1 

10-Q 

10-K 

333-198055 

4.5 

August 11, 2014 

333-191552 

10.9 

October 3, 2013 

10.1 

August 11, 2014 

001-36164 

10.23 

March 6, 2014 

10.18* 

  Twitter, Inc. 2013 Target Commission Plan. 

S-1/A 

333-191552 

10.20 

  October 22, 2013 

10.19* 

  Offer Letter between the Registrant and 
Richard Costolo, dated as of October 1, 
2013. 

10.20* 

  Offer Letter between the Registrant and 

S-1/A 

333-191552 

10.11 

October 22, 2013 

Anthony Noto, dated as of June 30, 2014. 

8-K 

333-191552 

10.1 

July 1, 2014 

10.21* 

  Offer Letter between the Registrant and 

Adam Bain, dated as of October 1, 2013. 

S-1/A 

333-191552 

10.14 

October 22, 2013 

10.22* 

  Offer Letter between the Registrant and Alex 

Roetter, dated as of October 1, 2013. 

S-1/A 

333-191552 

10.15 

October 22, 2013 

10.23* 

  Offer Letter between the Registrant and 

Vijaya Gadde, dated as of October 1, 2013.  S-1/A 

333-191552 

10.16 

October 22, 2013 

10.24* 

  Offer Letter between the Registrant and 

Peter Chernin, dated as of October 16, 2012. S-1 

333-191552 

10.17 

October 3, 2013 

10.25* 

10.26* 

10.27 

10.28 

10.29 

10.30 

  Change of Control Severance Policy 
Participation Agreement between the 
Company and Anthony Noto, dated as of 
June 30, 2014 

  Amended and Restated Change of Control 
Severance Policy Participation Agreement 
between Twitter, Inc. and Mike Gupta, dated 
as of August 8, 2014. 

  Form of Innovator’s Patent Agreement. 

  Office Lease between the Registrant and Sri 
Nine Market Square LLC, dated as of April 
20, 2011, as amended on May 16, 2011, 
September 30, 2011 and June 1, 2012. 

  Revolving Credit Agreement among the 
Registrant, the lenders party thereto and 
Morgan Stanley Senior Funding, Inc., as 
Administrative Agent, dated as of October 
22, 2013. 

  Amendment No. 1, dated September 10, 
2014, to the Revolving Credit Agreement, 
dated October 22, 2013, among Twitter, Inc., 
Morgan Stanley Senior Funding, Inc., as 
administrative agent, and the lenders from 
time to time party thereto. 

8-K 

001-36164 

10.2 

July 1, 2014 

10-Q 
S-1 

001-36164 
333-191552 

10.2 
10.19 

August 11, 2014 
  October 3, 2013 

S-1 

333-191552 

10.18 

October 3, 2013 

S-1 

333-191552 

10.21 

October 22, 2013 

8-K 

001-36164 

10.1 

September 10, 2014

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 
Number  

Exhibit Description 

Form 

File No. 

Exhibit 

Filing Date 

Incorporated by Reference 

8-K 

8-K 
  8-K 
  S-1 

001-36164 

10.1 

September 17, 2014

001-36164 
001-36164 
333-191552 

10.2 
10.3 
21.1 

September 17, 2014
  September 17, 2014
  October 15, 2013 

10.31 

  Purchase Agreement, dated September 11, 

2014, by and among Twitter, Inc. and 
Goldman, Sachs & Co. and Morgan Stanley 
& Co. LLC, as representatives of the initial 
purchasers named therein. 

10.32 

  Form of Convertible Note Hedge 

Confirmation. 

10.33 
21.1 

23.1 

  Form of Warrant Confirmation. 
  List of subsidiaries of the Registrant. 

  Consent of PricewaterhouseCoopers LLP, 
Independent Registered Public Accounting 
Firm. 

31.1 

  Certification of Chief Executive Officer 

pursuant to Exchange Act Rules 13a-14(a) 
and 15d-14(a), as adopted pursuant to 
Section 302 of the Sarbanes-Oxley Act of 
2002. 

31.2 

  Certification of Chief Financial Officer 

32.1† 

pursuant to Exchange Act Rules 13a-14(a) 
and 15d-14(a), as adopted pursuant to 
Section 302 of the Sarbanes-Oxley Act of 
2002. 

  Certifications of Chief Executive Officer and 
Chief Financial Officer pursuant to 18 U.S.C. 
Section 1350, as adopted pursuant to 
Section 906 of the Sarbanes-Oxley Act of 
2002. 

101.INS 
101.SCH 

  XBRL Instance Document. 
  XBRL Taxonomy Schema Linkbase 

Document 

101.CAL 

  XBRL Taxonomy Definition Linkbase 

Document. 

101.DEF 

  XBRL Taxonomy Calculation Linkbase 

Document. 

101.LAB 

  XBRL Taxonomy Labels Linkbase 

Document. 

101.PRE 

  XBRL Taxonomy Presentation Linkbase 

Document. 

*Indicates a management contract or compensatory plan or arrangement. 

†    The certifications attached as Exhibit 32.1 that accompany this Annual Report on Form 10-K, are deemed furnished 
and not filed with the Securities and Exchange Commission and are not to be incorporated by reference into any filing of 
Twitter, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, whether 
made before or after the date of this Annual Report on Form 10-K, irrespective of any general incorporation language 
contained in such filing. 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
  
 
  
 
 
 
 
 
 
 
 
 
 
 
 
  
  
  
 
  
 
 
 
 
 
 
 
 
 
 
 
 
  
  
  
 
  
 
 
 
 
 
 
 
 
 
 
 
 
  
  
  
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
BOARD OF DIRECTORS

EXECUTIVE TEAM

STOCK EXCHANGE

Jack Dorsey - Chairman
Co-Founder
Twitter
Chief Executive Officer
Square

Evan Williams 
Co-Founder
Twitter
Chief Executive Officer
Medium

Dick Costolo 
Chief Executive Officer
Twitter

Peter Chernin
Founder and Chairman
Chernin Entertainment and 
The Chernin Group

Peter Currie 
President
Currie Capital

Peter Fenton 
General Partner
Benchmark Capital

David Rosenblatt 
Chief Executive Officer
1stdibs

Marjorie Scardino
Director

Dick Costolo 
Chief Executive Officer

Anthony Noto
Chief Financial Officer

Adam Bain
President, Global Revenue  
& Partnerships

Vijaya Gadde
General Counsel & Secretary

Alex Roetter
Senior Vice President, Engineering

Kevin Weil
Senior Vice President, Product

Twitter stock is listed for trading 
on the New York Stock Exchange 
under the ticker symbol TWTR. 

TRANSFER AGENT

Computershare Trust Company
250 Royall Street
Canton, MA 02021

Phone: (781) 575-4238

Web: computershare.com/investor

A copy of the Company’s annual 
report filed with the Securities and 
Exchange Commission (Form 10-K) 
and Notice & Proxy Statement will 
be furnished without charge to any 
shareholder upon request.

By Internet: 
www.viewproxy.com/twitter/2015

By Phone:  
(877) 777-2857

By Email:  
requests@viewproxy.com

INVESTOR RELATIONS
1355 Market Street
Suite 900
San Francisco, California 94103
ir@twitter.com

Investor Relations Website:  
investor.twitterinc.com

Follow @TwitterIR