Letter from Ernst & Young LLP,
Independent Registered Public Accounting Firm,
Regarding Change in Accounting Principle
April 27, 2011
Board of Directors
Lockheed Martin Corporation
Ladies and Gentlemen:
Note 1 of the notes to the consolidated financial statements of Lockheed Martin Corporation (the Corporation) included in its Form 10-Q for the quarterly period ended March 27, 2011 describes a
change in the method for recognizing net sales for services contracts with the U.S. Government from the guidance described in Staff Accounting Bulletin 104, Revenue Recognition, to the percentage-of-completion method described in Financial
Accounting Standards Board Accounting Standards Codification Subtopic 605-35, Revenue RecognitionConstruction-Type and Production-Type Contracts. There are no authoritative criteria for determining a preferable revenue
recognition accounting method for service contracts with the U.S. Government based on the particular circumstances; however, we conclude that such change in the method of accounting is to an acceptable alternative method which, based on your
business judgment to make this change and for the stated reasons, is preferable in your circumstances.
We have not conducted an audit in accordance
with the standards of the Public Company Accounting Oversight Board (United States) of any financial statements of the Corporation as of any date or for any period subsequent to December 31, 2010, and therefore we do not express any opinion on
any financial statements of the Corporation subsequent to that date.
/s/ Ernst & Young LLP