X0306
4
2019-02-26
0
0001453814
Medidata Solutions, Inc.
MDSO
0001595291
Shannon Daniel Patrick
C/O MEDIDATA SOLUTIONS, INC.
350 HUDSON STREET, FLOOR 9
NEW YORK
NY
10014
0
1
0
0
EVP, Global Professional Svcs.
Common Stock
2019-02-26
4
F
0
1365
74.15
D
70288
D
Shares withheld by Medidata to satisfy the tax withholding obligation in connection with the vesting of previously awarded restricted stock.
/s/ Michael I. Otner, Attorney-in-Fact
2019-02-28