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Wednesday, February 10, 2010, 2:06AM ET - U.S. Markets open in 7 hours and 24 minutes. Dow Up 1.52% Nasdaq Up 1.17%
Medidata Solutions, Inc. (MDSO)On Feb 9: 15.26  Up 0.39 (2.62%)  
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HereMajor Holders
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Major HoldersGet Major Holders for:
BREAKDOWN
% of Shares Held by All Insider and 5% Owners: 20%
% of Shares Held by Institutional & Mutual Fund Owners: 31%
% of Float Held by Institutional & Mutual Fund Owners: 39%
Number of Institutions Holding Shares: 65

MAJOR DIRECT HOLDERS (FORMS 3 & 4)
HolderSharesReported
INSIGHT VENTURE PARTNERS IV LP12,42214-Dec-09
DE VRIES GLEN MICHAEL1,336,84022-Dec-09
SHERIF TAREK1,092,93422-Dec-09
HIRSCHFELD STEVEN ISAAC78,18725-Jan-10
DALZIEL BRUCE D37,00025-Jun-09


TOP INSTITUTIONAL HOLDERS
HolderShares% OutValue*Reported
ALGER (FRED) MANAGEMENT INC1,177,5325.20$17,839,60930-Sep-09
JANUS CAPITAL MANAGEMENT, LLC923,8604.08$13,996,47930-Sep-09
KINGDON CAPITAL MANAGEMENT LLC678,0002.99$10,271,70030-Sep-09
GILDER, GAGNON, HOWE & CO.421,0781.86$6,379,33130-Sep-09
PIER CAPITAL, LLC325,6511.44$4,933,61230-Sep-09
FRANKLIN RESOURCES, INC323,1001.43$4,894,96530-Sep-09
Cortina Asset Management, LLC221,527.98$3,356,13430-Sep-09
Barclays Global Investors UK Holdings Ltd175,546.77$2,659,52130-Sep-09
Stephens Investment Management Group157,350.69$2,383,85230-Sep-09
Ameriprise Financial, Inc.144,388.64$2,187,47830-Sep-09

TOP MUTUAL FUND HOLDERS
HolderShares% OutValue*Reported
JANUS VENTURE FUND480,8702.12$7,285,18030-Sep-09
ALGER SMALL CAP GROWTH INSTITUTIONAL PORTFOLIO351,7001.55$6,488,86531-Jul-09
Pacific Select Fund-Small Cap Growth Portfolio265,0001.17$4,014,75030-Sep-09
Wells Fargo Advantage Small Cap Value Fd189,500.84$2,994,10031-Oct-09
Alger Portfolios-Alger SmallCap Growth Portfolio167,100.74$2,531,56530-Sep-09
FRANKLIN STRATEGIC SERIES-SMALL CAP GROWTH FUND142,300.63$2,155,84530-Sep-09
MFS NEW DISCOVERY FUND138,900.61$2,202,95431-Aug-09
Columbia Fds Ser Tr I-Columbia Small Cap Growth Fd127,871.56$2,028,03431-Aug-09
ALGER FUND-SMALL CAP GROWTH FUND120,400.53$2,221,38031-Jul-09
Janus Triton Fund116,140.51$1,759,52130-Sep-09

View Transactions for Insiders & Institutional Holders
* Value shown is computed using the security's price on the report date given.


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