|Issuer:||MEDIDATA SOLUTIONS, INC. (MDSO)|
|Original Submission Date:|
C/O MEDIDATA SOLUTIONS, INC.
350 HUDSON STREET, 9TH FLOOR NEW YORK, NY 10014
|Title of Security||Transaction Date||2a. Deemed Execution Date||Transaction Code||Shares||Acquired or Disposed||Price per share||5. Amount of Securities Beneficially Owned Following Reported Transaction||6. Ownership Form Direct or Indirect||Nature of Indirect Ownership|
|Title of Derivative Security||Conversion or Exercise Price of Derivative Security||Transaction Date||Deemed Execution Date||Transaction Code||Number of Derivative Securities Acquired (A) or Disposed of (D)||Date Exercisable||Expiration Date||Title and Amount of Securities Underlying Derivative Security||Price of Derivative Security||Number of derivative Securities Beneficially Owned Following Reported Transaction(s)||Ownership Form: Direct (D) or Indirect (I)||Nature of Indirect Beneficial Ownership|
|f1||on october 28, 2019, pursuant to the agreement and plan of merger, dated as of june 11, 2019, by and among dassault systemes se ("ds"), dassault systemes americas corp., a delaware corporation ("parent"), 3ds acquisition 6 corp., a delaware corporation and a wholly-owned subsidiary of parent ("merger sub"), and medidata solutions, inc., a delaware corporation (the "issuer"), merger sub merged with and into the issuer, with the issuer surviving as a wholly-owned subsidiary of parent and an indirect wholly-owned subsidiary of ds (the "merger").|
|f2||disposed of pursuant to the merger agreement and by virtue of the merger, in which each share of medidata common stock, par value $0.01 per share ("issuer common stock"), issued and outstanding immediately prior to the completion of the merger (other than restricted share awards held by continuing employees) was converted into the right to receive $92.25 in cash and without interest (the "merger consideration").|