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

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FORM 11-K

Commission file number 0-20570

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A. FULL TITLE OF THE PLAN AND THE ADDRESS OF THE PLAN, IF DIFFERENT FROM THAT OF THE ISSUER NAMED BELOW:

IAC/InterActiveCorp Retirement Savings Plan

B. NAME OF ISSUER OF THE SECURITIES HELD PURSUANT TO THE PLAN AND THE ADDRESS OF ITS PRINCIPAL EXECUTIVE OFFICE:

IAC/InterActiveCorp
555 West 18th Street
New York, New York 10011

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REQUIRED INFORMATION

        1.     Not applicable.

        2.     Not applicable.

        3.     Not applicable.

        4.     The IAC/InterActiveCorp Retirement Savings Plan (the "Plan") is subject to the requirements of the Employee Retirement Income Security Act of 1974 ("ERISA"). Attached hereto as Appendix I is a copy of the most recent financial statements and supplemental schedule of the Plan prepared in accordance with the financial reporting requirements of ERISA.

EXHIBIT INDEX

23.1    Consent of Ernst & Young LLP.

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SIGNATURES

        Pursuant to the requirements of the Securities Exchange Act of 1934, the trustees (or other persons who administer the Plan) have duly caused this annual report to be signed on its behalf by the undersigned hereunto duly authorized.

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Appendix I

Financial Statements and Supplemental Schedule

        IAC/InterActiveCorp Retirement Savings Plan—December 31, 2010 and 2009 and Year Ended December 31, 2010 with Report of Independent Registered Public Accounting Firm.

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IAC/InterActiveCorp Retirement Savings Plan

Financial Statements
and Supplemental Schedule
December 31, 2010 and 2009

Contents

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Report of Independent Registered Public Accounting Firm

The Administrative Committee
IAC/InterActiveCorp Retirement Savings Plan

        We have audited the accompanying statements of net assets available for benefits of the IAC/InterActiveCorp Retirement Savings Plan (the "Plan") as of December 31, 2010 and 2009, and the related statement of changes in net assets available for benefits for the year ended December 31, 2010. These financial statements are the responsibility of the Plan's management. Our responsibility is to express an opinion on these financial statements based on our audits.

        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 audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. We were not engaged to perform an audit of the Plan's internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Plan's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes 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. We believe that our audits provide a reasonable basis for our opinion.

        In our opinion, the financial statements referred to above present fairly, in all material respects, the net assets available for benefits of the Plan at December 31, 2010 and 2009, and the changes in its net assets available for benefits for the year ended December 31, 2010, in conformity with U.S. generally accepted accounting principles.

        Our audits were performed for the purpose of forming an opinion on the financial statements taken as a whole. The accompanying supplemental schedule of assets (held at year end) as of December 31, 2010 is presented for purposes of additional analysis and is not a required part of the financial statements but is supplementary information required by the Department of Labor's Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. The supplemental schedule is the responsibility of the Plan's management. The supplemental schedule has been subjected to the auditing procedures applied in our audits of the financial statements and, in our opinion, is fairly stated in all material respects in relation to the financial statements taken as a whole.

/s/ ERNST & YOUNG LLP

New York, New York
June 17, 2011

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IAC/InterActiveCorp Retirement Savings Plan

Statements of Net Assets Available for Benefits

See accompanying notes to financial statements.

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IAC/InterActiveCorp Retirement Savings Plan

Statement of Changes in Net Assets Available for Benefits

See accompanying notes to financial statements.

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IAC/InterActiveCorp Retirement Savings Plan

Notes to Financial Statements

December 31, 2010 and 2009

1. Description of the Plan

        The following description of the IAC/InterActiveCorp Retirement Savings Plan (the "Plan") provides only general information. Participants should refer to the Plan documents for a complete description of the Plan's provisions.

General

        The Plan is a defined contribution plan covering substantially all employees of IAC/InterActiveCorp ("IAC" or the "Company") and certain affiliated companies. The Plan is subject to the provisions of the Employee Retirement Income Security Act of 1974 ("ERISA").

        The Plan was amended on January 1, 2009 to reflect the appointment of Schwab Retirement Plan Services, Inc. ("SRPS") as Plan record keeper and Charles Schwab Trust Company, a division of Charles Schwab Bank, as trustee. In connection with this appointment and after a thorough review of Plan investments, most then current investment options under the Plan were changed to reflect the investment options offered by SRPS. SRPS is an affiliate of Charles Schwab & Co., Inc.

Contributions

        Participants can make pre-tax contributions and/or Roth 401(k) contributions ranging from 1% to 50%, and after-tax contributions ranging from 1% to 10%, in each case, of their compensation (as defined in the Plan documents) through payroll deductions. Roth 401(k) contributions were introduced to the Plan for the pay period beginning October 1, 2009. Participant contributions are subject to the annual limitation established by the Internal Revenue Service ("IRS"). Participants can direct their contributions to any of the Plan's investment options and may generally change their investment options on a daily basis. All newly hired employees of the Company are automatically enrolled in the Plan, with pre-tax contributions of 3% directed into the various Alliance Bernstein Retirement Stock Funds based on their expected year of retirement commencing approximately 90 days after the date of hire. Newly hired employees are notified of their automatic enrollment in advance and may elect to change their investment option, contribution percentage or not to participate in the Plan prior to the first automatic deferral.

        The Company contributes an amount equal to 50% of the first 6% of compensation that a participant contributes in each payroll period to the Plan. The Company may also make a discretionary contribution of funds annually, which, if applicable, would be determined by the Company's Board of Directors (or a Committee thereof). For the year ended December 31, 2010, the Company's matching contribution was $4,579,655. No discretionary contributions were made to the Plan during the year ended December 31, 2010. Company matching contributions are directed to the investment options of the Plan based upon the respective participant's investment election.

Vesting

        Participant contributions are fully vested at the time of contribution. Generally, Company matching contributions (plus actual earnings thereon) fully vest after two years of credited service. Certain participants who were employees in plans that were merged into the Plan have different vesting periods for Company matching contributions. In these cases, participants should refer to the applicable merged Plan documents for a complete description of vesting provisions.

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IAC/InterActiveCorp Retirement Savings Plan

Notes to Financial Statements (Continued)

December 31, 2010 and 2009

1. Description of the Plan (Continued)

Eligibility

        Participants 18 years of age or older are eligible to participate upon commencement of service (as defined in the Plan documents).

Participant Accounts

        Each participant's account is credited with the participant's contribution and Company matching contribution as well as an allocation of Plan earnings. Allocations are based on participant account balances (as defined in the Plan documents). The benefit to which each participant is entitled is the vested portion of each such participant's account.

Forfeitures

        Company matching contributions that do not vest become forfeitures. Forfeitures are first made available to reinstate previously forfeited account balances of qualifying participants who have left the Company and have subsequently returned, in accordance with applicable law. Remaining amounts, if any, are used to reduce prospective Company matching contributions, to fund corrective action necessary to remedy the failure of non-discrimination testing and to pay Plan expenses. Cumulative forfeited non-vested accounts totaled $270,895 and $674,555 at December 31, 2010 and 2009, respectively. The amount of forfeitures used to reduce Company matching contributions totaled $794,722 for the year ended December 31, 2010.

Notes Receivable from Participants

        Notes receivable from participants represents participant loans that are recorded at their unpaid principal balance plus any accrued but unpaid interest. Generally, a participant may borrow from his/her account a minimum of $1,000, up to a maximum equal to the lesser of (i) $50,000 reduced by the highest outstanding loan balance within the last 12 months or (ii) 50% of his/her vested account balance. With the exception of loans used to purchase a primary residence, which can have terms of up to 15 years, loan terms are limited to a maximum of five years. Any loans that have been transferred into the Plan from a previous plan are subject to the initial terms of the loan. Loans are secured by the balance in the participant's account and bear interest at a rate commensurate with commercial prevailing rates as determined by the Plan Administrator. Principal and interest are paid ratably through regular payroll deductions for actively employed participants. Upon termination of employment, any outstanding loans are due and payable within 90 days following the termination date. Interest rates on outstanding loans range from 4.25% to 9.25%, with maturity dates through July 30, 2025.

Payment of Benefits

        Upon a participant's retirement, death, disability or other interruption of continuous service, his/her entire vested account balance will be distributed unless the participant's vested account balance is more than $5,000 and the participant elects to leave such amounts in the Plan. If the vested account balance does not exceed $5,000 but is more than $1,000, then such balance will be automatically transferred to a rollover IRA account unless the participant elects otherwise. If the vested account

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IAC/InterActiveCorp Retirement Savings Plan

Notes to Financial Statements (Continued)

December 31, 2010 and 2009

1. Description of the Plan (Continued)

balance is $1,000 or less, then it will be distributed in the form of a lump sum payment to the participant. Participants reaching the age of 59¹/2 may elect to withdraw some or all of their vested account balance while still employed. Participants' pre-tax contributions may be withdrawn earlier, subject to certain hardship withdrawal provisions of the Plan. Generally, participants who have made after-tax contributions may elect to withdraw some or all of their vested account balance with no limit on the number of withdrawals of this type. Terminated participants may elect to receive a distribution of their vested account balance, subject to income tax and early withdrawal penalties.

Plan Termination

        Although the Company has expressed no intent to terminate the Plan, in the event that the Plan is terminated by the Company, all amounts credited to the participants' accounts would become 100% vested and the net assets would be distributed to participants.

Administrative Expenses

        Substantially all of the administrative expenses are borne by the Plan unless the Company elects to pay such expenses.

2. Summary of Significant Accounting Policies

Basis of Accounting

        The accompanying financial statements have been prepared on the accrual basis of accounting.

Management Estimates

        The preparation of the financial statements in accordance with U.S. generally accepted accounting principles requires the Plan's management to make estimates that affect amounts reported in the financial statements and the accompanying notes. Actual results could differ from those estimates.

Investments

        The Plan's investments are stated at fair value except for its investment in a common collective trust fund, which is valued at contract value. The shares of registered investment companies and the self-directed brokerage account are valued at quoted market prices at year end. Securities traded on a national securities exchange are valued at the last reported sales price on the last business day of the Plan year.

        The Plan invests in investment contracts through its participation in the Schwab Stable Value Fund, a common collective trust fund. Investment contracts held by a defined contribution plan or by a fund within a defined contribution plan, such as those held by the Schwab Stable Value Fund, are required to be reported at fair value. However, contract value is the relevant measurement attribute for reporting investment contracts on the statement of changes in net assets available for benefits because contract value is the amount participants would receive if they were to initiate permitted transactions under the terms of the Plan. The accompanying statements of net assets available for benefits presents the fair value of the common collective trust fund as well as the adjustment of the fully benefit-

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IAC/InterActiveCorp Retirement Savings Plan

Notes to Financial Statements (Continued)

December 31, 2010 and 2009

2. Summary of Significant Accounting Policies (Continued)

responsive common collective trust fund from fair value to contract value. The accompanying statement of changes in net assets available for benefits is prepared on a contract value basis. The fair value of the Plan's interest in the Schwab Stable Value Fund is based on the net asset value ("NAV") provided by the administrator of the fund. The NAV is based on the value of the underlying assets owned by the fund, minus its liabilities, and then divided by the number of shares outstanding.

        Purchases and sales of securities are recorded as of their trade date. Interest income is recorded on the accrual basis. Dividends are recorded on the ex-dividend date.

Recent Accounting Pronouncements

        In September 2010, the Financial Accounting Standards Board issued Accounting Standards Update 2010-25, Reporting Loans to Participants by Defined Contribution Pension Plans, ("ASU 2010-25"). ASU 2010-25 requires participant loans to be measured at their unpaid principal balance plus any accrued but unpaid interest and classified as notes receivable from participants. Previously participant loans were measured at fair value and classified as investments. ASU 2010-25 is effective for fiscal years ending after December 15, 2010 and is required to be applied retrospectively. Adoption of ASU 2010-25 did not change the value of participant loans from the amount previously reported as of December 31, 2009. Participant loans have been reclassified to notes receivable from participants as of December 31, 2009.

3. Investments

        The Plan's investments (including investments purchased, sold and held during the year) appreciated in fair value as follows:

        The following are investments that represent 5% or more of the Plan's net assets:

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IAC/InterActiveCorp Retirement Savings Plan

Notes to Financial Statements (Continued)

December 31, 2010 and 2009