UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K/A

(Amendment No. 2)

For the fiscal year ended December 31, 2013

OR

For the transition period from                      to                     

Commission File No. 001-51609

Inland American Real Estate Trust, Inc.

(Exact name of registrant as specified in its charter)

630-218-8000

(Registrant’s telephone number, including area code)

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

Securities registered pursuant to Section 12(g) of the Act: Common stock, $0.001 par value per share

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

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

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  x    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (Section §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  x    No  ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K 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 definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act:

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  x

There is no established market for the registrant’s shares of common stock. The aggregate market value of the registrant’s common stock held by non-affiliates of the registrant as of June 30, 2013 (the last business day of the registrant’s most recently completed second quarter) was approximately $6,210,793,798, based on the estimated per share value of $6.93, as established by the registrant on December 19, 2012.

As of June 18, 2014, there were 860,013,173 shares of the registrant’s common stock outstanding.

Documents incorporated by reference: None.

EXPLANATORY NOTE

The sole purpose of this Amendment No. 2 is to remove the signature of David Mahon, a former director, whose signature block was inadvertently included in the Form 10-K/A as originally filed on April 30, 2014 (the “Amended Filing”).

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

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

INLAND AMERICAN REAL ESTATE TRUST, INC.

Exhibit Index