Exhibit 16.1
March 25, 2013
U.S. Securities and Exchange Commission
Office of the Chief Accountant
100 F Street, NE
Washington, DC 20549
Re: MicroStrategy Incorporated
File No. 0-24435
Dear Sir or Madam:
We have read Item 4.01 of Form 8-K of MicroStrategy Incorporated dated March 21, 2013, and agree with the statements concerning our Firm contained therein.
Very truly yours,
/s/ GRANT THORNTON LLP
McLean, Virginia
March 25, 2013