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Institutional Holdings of STEC, INC. (STEC) on 12/31/2011

1. Company Information

Company/StockSTEC, INC. (stock symbol: STEC)
Funds Ownership103 out of total 3028 funds (3%) own this stock
Funds own total 27,189,165 shares, 52.87% of all outstanding shares
Funds SOLD -4,310,061 shares (-13.68%) in the quarter ended on 12/31/2011

2. Top 20 Funds Held STEC in this Quarter (By Shares) Add to Yahoo Finance Message Board

No.FundSharesPut/CallActivity(Shr)% Port.% Out. Shrs
1.)ARTIS CAPITAL MANAGEMENT LP3,114,099Cut -0.45%2.60%6.06%
2.)VANGUARD GROUP INC2,182,542Cut -5.19%0.00%4.24%
3.)PERKINS INVESTMENT MANAGEMENT LLC2,027,400Added 7.28%0.11%3.94%
4.)COATUE MANAGEMENT LLC1,979,181Unchanged0.60%3.85%
5.)PEAK6 INVESTMENTS LP1,708,500PUTCut -64.74%0.07%3.32%
6.)ROYCE & ASSOCIATES LLC1,703,400Cut -5.75%0.05%3.31%
7.)EMPIRE CAPITAL MANAGEMENT LLC1,305,000New1.40%2.54%
8.)SPOT TRADING LLC1,245,500PUTCut -42.60%0.14%2.42%
9.)PEAK6 INVESTMENTS LP1,165,772Cut -60.93%0.05%2.27%
10.)BLACKROCK INSTITUTIONAL TRUST COMPANY NA1,159,166Cut -1.66%0.00%2.25%
11.)DIMENSIONAL FUND ADVISORS INC1,060,637Cut -0.27%0.01%2.06%
12.)SPOT TRADING LLC1,015,718Cut -18.43%0.12%1.97%
13.)STATE STREET CORP783,740Cut -1.40%0.00%1.52%
14.)BLACKROCK FUND ADVISORS718,601Cut -14.08%0.00%1.40%
15.)WCM INVESTMENT MANAGEMENT CA710,855Cut -3.94%0.64%1.38%
16.)PEAK6 INVESTMENTS LP682,800CALLCut -43.37%0.03%1.33%
17.)RENAISSANCE TECHNOLOGIES LLC569,928New0.02%1.11%
18.)NORTHERN TRUST CORP531,483Cut -3.15%0.00%1.03%
19.)GOLDMAN SACHS GROUP INC521,630Cut -68.91%0.00%1.01%
20.)SUSQUEHANNA INTERNATIONAL GROUP LLP513,000PUTCut -55.58%0.00%1.00%



3. Top 20 Funds Held STEC in this Quarter (By % of Portfolio) Add to Yahoo Finance Message Board

No.FundSharesPut/CallActivity(Shr)% Port.% Out. Shrs
1.)ARTIS CAPITAL MANAGEMENT LP3,114,099Cut -0.45%2.60%6.06%
2.)EMPIRE CAPITAL MANAGEMENT LLC1,305,000New1.40%2.54%
3.)WEALTHTRUST AXIOM LLC267,335Added 23.75%1.25%0.52%
4.)TANAKA CAPITAL MANAGEMENT INC30,444Cut -19.46%1.01%0.06%
5.)WCM INVESTMENT MANAGEMENT CA710,855Cut -3.94%0.64%1.38%
6.)COATUE MANAGEMENT LLC1,979,181Unchanged0.60%3.85%
7.)HERALD INVESTMENT MANAGEMENT LTD100,000Unchanged0.46%0.19%
8.)ARTORIUS MANAGEMENT LLC10,546New0.44%0.02%
9.)ZELIFF WALLACE JACKSON INVESTMENT COUNSEL INC251,515Cut -38.14%0.39%0.49%
10.)ORBITRONIX LP50,000New0.35%0.10%
11.)PRINCETON CAPITAL MANAGEMENT INC59,055Cut -42.55%0.28%0.11%
12.)EMPIRE CAPITAL MANAGEMENT LLC210,000CALLNew0.23%0.41%
13.)ESSEX INVESTMENT MANAGEMENT CO LLC260,377Cut -17.46%0.22%0.51%
14.)MARKSTON INTERNATIONAL LLC233,600Cut -1.43%0.16%0.45%
15.)1798 GLOBAL PARTNERS (CAYMAN ISLANDS) LTD185,500PUTNew0.15%0.36%
16.)SPOT TRADING LLC1,245,500PUTCut -42.60%0.14%2.42%
17.)GOTHAM ASSET MANAGEMENT LLC136,394Added 26.72%0.14%0.27%
18.)SPOT TRADING LLC1,015,718Cut -18.43%0.12%1.97%
19.)CAXTON ASSOCIATES LLC411,219Added 109.40%0.11%0.80%
20.)PERKINS INVESTMENT MANAGEMENT LLC2,027,400Added 7.28%0.11%3.94%

4. Top 20 Funds BOUGHT NEW STEC in this Quarter (By Shares) Add to Yahoo Finance Message Board

No.FundSharesPut/Call% Port.% Out. Shrs
1.)EMPIRE CAPITAL MANAGEMENT LLC1,305,0001.40%2.54%
2.)RENAISSANCE TECHNOLOGIES LLC569,9280.02%1.11%
3.)EMPIRE CAPITAL MANAGEMENT LLC210,000CALL0.23%0.41%
4.)1798 GLOBAL PARTNERS (CAYMAN ISLANDS) LTD185,500PUT0.15%0.36%
5.)OXFORD ASSET MANAGEMENT172,8710.04%0.34%
6.)ORBITRONIX LP50,0000.35%0.10%
7.)MADISON SQUARE INVESTORS LLC47,0740.00%0.09%
8.)SAC CAPITAL ADVISORS LP36,0750.00%0.07%
9.)JEFFERIES GROUP INC DE 29,3000.00%0.06%
10.)TWO SIGMA INVESTMENTS LLC25,4920.00%0.05%
11.)DEERE & CO16,7100.01%0.03%
12.)ARTORIUS MANAGEMENT LLC10,5460.44%0.02%
13.)CENTRAL TRUST & INVESTMENT CO2,0000.00%0.00%
14.)QUANTBOT TECHNOLOGIES LLC1,8000.02%0.00%
15.)FNY MANAGED ACCOUNTS LLC1,7200.03%0.00%
16.)SPRINGBOK CAPITAL MANAGEMENT LLC6860.00%0.00%
17.)GLOBAL X MANAGEMENT CO LLC1960.00%0.00%
18.)PARALLAX VOLATILITY ADVISERS LLC100CALL0.00%0.00%

5. Top 20 Funds SOLD OUT STEC in this Quarter (By Shares) Add to Yahoo Finance Message Board

No.FundSharesPut/Call% Port.% Out. Shrs
1.)TIMBER HILL LLC604,200CALL0.02%1.17%
2.)CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM387,1500.01%0.75%
3.)TIMBER HILL LLC322,600PUT0.01%0.63%
4.)FISHER ASSET MANAGEMENT LLC296,0250.01%0.58%
5.)SURSUM CAPITAL MANAGEMENT LP250,0001.27%0.49%
6.)TECHNICAL FINANCIAL SERVICES LLC113,9120.07%0.22%
7.)BALYASNY ASSET MANAGEMENT LLC100,0000.06%0.19%
8.)ORBITRONIX LP100,000CALL0.76%0.19%
9.)S SQUARED TECHNOLOGY LLC85,5000.18%0.17%
10.)ROYAL BANK OF CANADA 81,500CALL0.00%0.16%
11.)SHELL ASSET MANAGEMENT CO74,2890.02%0.14%
12.)NATCAN INVESTMENT MANAGEMENT INC69,6270.02%0.14%
13.)PRUDENTIAL FINANCIAL INC59,6500.00%0.12%
14.)D E SHAW & CO INC58,200PUT0.00%0.11%
15.)HIGHBRIDGE CAPITAL MANAGEMENT LLC49,3000.01%0.10%
16.)THREE ZERO THREE CAPITAL PARTNERS LLC25,2000.23%0.05%
17.)COMMERZBANK AKTIENGESELLSCHAFT FI20,7330.00%0.04%
18.)TIMBER HILL LLC17,9390.00%0.03%
19.)FORT HILL CAPITAL MANAGEMENT LLC17,500PUT0.04%0.03%
20.)STIFEL NICOLAUS & CO INC MO 17,2940.01%0.03%