Securities registered pursuant to Section 12(b) of the Act: Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.Yes☒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 12months (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☐ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).Yes☒No☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company.See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financialaccounting standards provided pursuant to Section 13(a) of the Exchange Act.☐ Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reportingunder Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.☒ If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correctionof an error to previously issued financial statements.☐ Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’sexecutive officers during the relevant recovery period pursuant to §240.10D-1(b).☐ Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).Yes☐No☒ The aggregate market value of our common stock held by non-affiliates of the registrant as of the last business day of the registrant’s most recently completed second fiscal quarterwas $1,903,322,909based on the closing price on The Nasdaq Global Select Market on such date. Table of Contents PART I Item 1.BusinessItem 1A.Risk FactorsItem 1B.Unresolved Staff CommentsItem 1C.CybersecurityItem 2.PropertiesItem 3.Legal ProceedingsItem 4.Mine Safety Disclosures PART II Item 5.Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities34Item 6.[Reserved]35Item 7.Management’s Discussion and Analysis of Financial Condition and Results of Operations36Item 7A.Quantitative and Qualitative Disclosures About Market Risk58Item 8.Financial Statements and Supplementary Data61Item 9.Changes in and Disagreements with Accountants on Accounting and Financial Disclosure120Item 9A.Controls and Procedures120Item 9B.Other Information121Item 9C.Disclosure Regarding Foreign Jurisdictions that Prevent Inspections121 PART III Item 10.Directors, Executive Officers and Corporate Governance121Item 11.Executive Compensation121Item 12.Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters121Item 13.Certain Relationships and Related Transactions, and Director Independence121Item 14.Principal Accounting Fees and Services121 PART IV We refer to Tripadvisor, Inc. and our wholly-owned subsidiaries as “Tripadvisor,” “Tripadvisor group,” “the Company,” “us,” “we”and “our” in this Annual Report on Form 10-K. Cautionary Note Regarding Forward-Looking Statements This Annual Report on Form 10-K contains “forward-looking statements” that involve risks and uncertainties, as well as assumptionsthat, if they never materialize or prove incorrect, could cause our results to differ materially from those expressed or implied by such forward-looking statements. The statements contained in this Annual Report that are not purely historical are forward-looking statements within themeaning of Section 27A of the Securities Act of 1933, as amended, or the Securities Act, and Section 21E of the Securities Exchange Act of1934, as amended, or the Exchange Act. The following words, when used, are intended to identify forward-looking statements: “anticipate,”“believe,” “could,” “continue,” “estimate,” “expect,” “intend,” “likely,” “may,” “might,” “plan,” “project,” “target,” “result,” “should,” “will,”and similar expressions which do not relate solely to historical matters. We caution investors that