UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of The

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): August 20, 2012

AMERICAN INTERNATIONAL GROUP, INC.

(Exact name of registrant as specified in its charter)

180 Maiden Lane

New York, New York 10038

(Address of principal executive offices)

Registrant’s telephone number, including area code: (212) 770-7000

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

Section 8 — Other Events

Item 8.01. Other Events.

On August 20, 2012, American International Group, Inc. (“AIG”) intends to launch an offering of its Subordinated Notes due 2015 (the “Notes”).

Pursuant to the terms of AIG’s outstanding replacement capital covenants (the “RCCs”) and subject to compliance therewith, the Notes will become the “covered debt” under each RCC upon the issuance of the Notes. Each RCC was originally entered into in connection with the issuance of one of the eight series of AIG’s Junior Subordinated Debentures (collectively, the “Junior Subordinated Debentures”) listed in the table below. Each RCC runs in favor of and is for the benefit of the holders (or beneficial owners holding through a participant in a clearing agency) of the “covered debt.”

At the time of the issuance of the Notes, AIG intends to amend each of the RCCs to delete all of the covenants that currently restrict AIG’s ability to repay, redeem or purchase the applicable series of the Junior Subordinated Debentures unless AIG issues certain replacement capital securities, because these provisions of the RCCs are no longer required to improve the equity credit ascribed to the Junior Subordinated Debentures by the rating agencies.

By purchasing the Notes, holders of the Notes, as holders of the “covered debt” under each of the RCCs, are irrevocably consenting to the amendments to each RCC, and represent and agree that they waive any reliance on any covenant, promise or agreement (whether express or implied) set forth in the RCCs prior to those amendments, and will not take or attempt to take any action to enforce any such covenant, promise or agreement set forth in the RCCs prior to those amendments. Each current and future holder of the Notes will be deemed to have consented to such amendments and made such representations and agreements and such consent, representations and agreements will be binding on all purchasers.

The form of the amendment to the RCCs is filed as an exhibit to this Current Report on Form 8-K and is incorporated into this Item 8.01 by reference.

Item 9.01 Financial Statements and Exhibits.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXHIBIT INDEX