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Institutional Holdings of S1 CORPORATION (SONE) on 12/31/2011

1. Company Information

Company/StockS1 CORPORATION (stock symbol: SONE)
Funds Ownership99 out of total 3028 funds (3%) own this stock
Funds own total 45,391,005 shares, 84.94% of all outstanding shares
Funds SOLD -3,021,889 shares (-6.24%) in the quarter ended on 12/31/2011

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

No.FundSharesPut/CallActivity(Shr)% Port.% Out. Shrs
1.)WATER ISLAND CAPITAL LLC5,681,766Added 78.19%3.03%10.63%
2.)AQR CAPITAL MANAGEMENT LLC4,142,314Added 119.11%0.25%7.75%
3.)VANGUARD GROUP INC2,596,779Added 2.94%0.00%4.86%
4.)CENTAURUS CAPITAL LP2,309,714Added 57.42%9.86%4.32%
5.)DIMENSIONAL FUND ADVISORS INC2,229,063Cut 0.00%0.03%4.17%
6.)ARBITRAGE & TRADING MANAGEMENT CO2,173,508New0.56%4.07%
7.)PENTWATER CAPITAL MANAGEMENT LP2,123,400Added 76.95%0.48%3.97%
8.)SANDELL ASSET MANAGEMENT CORP1,957,300New2.95%3.66%
9.)CREDIT AGRICOLE S A1,736,710Added 559.07%0.08%3.25%
10.)BLACKROCK INSTITUTIONAL TRUST COMPANY NA1,574,315Added 3.50%0.00%2.95%
11.)TIG ADVISORS LLC1,444,130Cut -46.29%1.85%2.70%
12.)BLACKROCK FUND ADVISORS1,136,448Cut -0.18%0.01%2.13%
13.)OXFORD ASSET MANAGEMENT1,061,786Cut -7.15%0.25%1.99%
14.)STATE STREET CORP1,028,146Cut -20.22%0.00%1.92%
15.)SG AMERICAS SECURITIES LLC915,075New0.09%1.71%
16.)LOEB ARBITRAGE MANAGEMENT LLC900,000Cut -18.92%3.79%1.68%
17.)NORTHERN TRUST CORP747,747Added 0.15%0.00%1.40%
18.)NOMURA HOLDINGS INC736,320Added 2,877.32%0.01%1.38%
19.)GABELLI SECURITIES INC644,414Added 180.30%1.75%1.21%
20.)RENAISSANCE TECHNOLOGIES LLC596,027Added 58.52%0.02%1.12%



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

No.FundSharesPut/CallActivity(Shr)% Port.% Out. Shrs
1.)REXFORD OFFSHORE L L C122,498Cut -12.63%10.13%0.23%
2.)REXFORD HOLDING MANAGEMENT LLC452,700Added 1,146.76%10.04%0.85%
3.)CENTAURUS CAPITAL LP2,309,714Added 57.42%9.86%4.32%
4.)LOEB ARBITRAGE MANAGEMENT LLC900,000Cut -18.92%3.79%1.68%
5.)NS ADVISORS LLC429,736Cut -58.59%3.61%0.80%
6.)AM INVESTMENT PARTNERS LLC52,500Added 100.90%3.16%0.10%
7.)WATER ISLAND CAPITAL LLC5,681,766Added 78.19%3.03%10.63%
8.)SANDELL ASSET MANAGEMENT CORP1,957,300New2.95%3.66%
9.)TIG ADVISORS LLC1,444,130Cut -46.29%1.85%2.70%
10.)GABELLI SECURITIES INC644,414Added 180.30%1.75%1.21%
11.)HAVENS ADVISORS LLC461,700Cut -35.88%1.74%0.86%
12.)HARVEST MANAGEMENT LLC102,500Cut -65.55%1.37%0.19%
13.)LONGFELLOW INVESTMENT MANAGEMENT CO LTD PARTNERSHIP130,800New1.08%0.24%
14.)GREEN ARROW CAPITAL MANAGEMENT LLC537,400Cut -21.55%0.66%1.01%
15.)ARBITRAGE & TRADING MANAGEMENT CO2,173,508New0.56%4.07%
16.)CNH PARTNERS LLC463,470Added 119.52%0.52%0.87%
17.)PENTWATER CAPITAL MANAGEMENT LP2,123,400Added 76.95%0.48%3.97%
18.)TETON ADVISORS INC183,500Unchanged0.36%0.34%
19.)VERTEX ONE ASSET MANAGEMENT INC190,000New0.32%0.36%
20.)AQR CAPITAL MANAGEMENT LLC4,142,314Added 119.11%0.25%7.75%

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

No.FundSharesPut/Call% Port.% Out. Shrs
1.)ARBITRAGE & TRADING MANAGEMENT CO2,173,5080.56%4.07%
2.)SANDELL ASSET MANAGEMENT CORP1,957,3002.95%3.66%
3.)SG AMERICAS SECURITIES LLC915,0750.09%1.71%
4.)FARALLON CAPITAL MANAGEMENT LLC300,0000.07%0.56%
5.)WOLVERINE ASSET MANAGEMENT LLC259,4530.05%0.49%
6.)TWO SIGMA INVESTMENTS LLC194,7000.02%0.36%
7.)VERTEX ONE ASSET MANAGEMENT INC190,0000.32%0.36%
8.)HUDSON BAY CAPITAL MANAGEMENT LP152,2790.08%0.28%
9.)LONGFELLOW INVESTMENT MANAGEMENT CO LTD PARTNERSHIP130,8001.08%0.24%
10.)CITIGROUP INC64,0440.00%0.12%
11.)TWO SIGMA ADVISERS LLC25,1000.02%0.05%
12.)OPPENHEIMER & CO INC21,8500.02%0.04%
13.)RUSSELL FRANK CO 20,1960.00%0.04%
14.)NEUBERGER BERMAN GROUP LLC14,6100.00%0.03%
15.)GUGGENHEIM CAPITAL LLC13,8280.00%0.03%
16.)CITADEL ADVISORS LLC13,800CALL0.00%0.03%
17.)INDEXIQ ADVISORS LLC11,9370.02%0.02%
18.)MADISON SQUARE INVESTORS LLC9,4530.00%0.02%
19.)CITADEL ADVISORS LLC3,100PUT0.00%0.01%
20.)CITADEL ADVISORS LLC1,2680.00%0.00%

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

No.FundSharesPut/Call% Port.% Out. Shrs
1.)WELLINGTON MANAGEMENT CO LLP5,309,1900.02%9.93%
2.)FMR LLC3,057,0800.01%5.72%
3.)EPOCH INVESTMENT PARTNERS INC1,683,6710.13%3.15%
4.)P2 CAPITAL PARTNERS LLC1,680,0003.29%3.14%
5.)MILLENNIUM MANAGEMENT LLC1,387,5390.13%2.60%
6.)STARK OFFSHORE MANAGEMENT LLC1,205,0000.97%2.25%
7.)JMP ASSET MANAGEMENT LLC800,0001.91%1.50%
8.)1798 GLOBAL PARTNERS (CAYMAN ISLANDS) LTD680,0000.95%1.27%
9.)TIRESIAS CAPITAL LTD297,5001.35%0.56%
10.)CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM235,0350.01%0.44%
11.)CLARIVEST ASSET MANAGEMENT LLC179,5210.11%0.34%
12.)HARBERT MANAGEMENT CORP143,6000.35%0.27%
13.)CAXTON ASSOCIATES LLC141,7490.06%0.27%
14.)BNP PARIBAS ARBITRAGE SNC133,3030.00%0.25%
15.)BNP PARIBAS ARBITRAGE SA133,3030.00%0.25%
16.)MOORE CAPITAL MANAGEMENT LLC100,0000.03%0.19%
17.)SCHNEIDER CAPITAL MANAGEMENT CORP65,8200.05%0.12%
18.)FNY MANAGED ACCOUNTS LLC63,7500.78%0.12%
19.)CATAPULT CAPITAL MANAGEMENT LLC52,7690.09%0.10%
20.)PRUDENTIAL FINANCIAL INC49,3000.00%0.09%