September 17, 2012
FILED BY EDGAR
Ms. Jennifer Fugario
Staff Accountant
Securities and Exchange Commission
Washington, D.C. 20549
Dear Ms. Fugario:
This will confirm our telephone conversation of September 14, 2012 in which we advised you that we were in receipt of the Staff’s letter of September 7, 2012 with respect to your review of Medidata Solutions, Inc.’s Annual Report on Form 10-K for the year ended December, 2011 and that you agreed to extend the time for us to furnish our responses to the Staff’s comments until September 28, 2012.
Thank you for your consideration.
Very truly yours.
/s/ Cory Douglas
Cory Douglas
Chief Financial Officer
Medidata Solutions Worldwide 79 Fifth Avenue, 8th Floor, New York, NY 10003 USA
p +1 212 918 1800 f +1 212 918 1818 www.mdsol.com