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Institutional Holdings of SILICON LABORATORIES, INC. (SLAB) on 12/31/2011

1. Company Information

Company/StockSILICON LABORATORIES, INC. (stock symbol: SLAB)
Funds Ownership128 out of total 3028 funds (4%) own this stock
Funds own total 41,325,275 shares, 92.82% of all outstanding shares
Funds SOLD -210,300 shares (-0.51%) in the quarter ended on 12/31/2011

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

No.FundSharesPut/CallActivity(Shr)% Port.% Out. Shrs
1.)PRICE T ROWE ASSOCIATES INC MD 7,482,920Cut -1.93%0.11%16.81%
2.)BLAIR WILLIAM & CO IL5,664,077Added 0.83%0.63%12.72%
3.)FMR LLC5,431,880Cut -2.70%0.05%12.20%
4.)LORD ABBETT & CO LLC3,314,861Added 20.41%0.35%7.45%
5.)VANGUARD GROUP INC2,045,154Cut -0.65%0.01%4.59%
6.)COATUE MANAGEMENT LLC2,040,312Cut -5.53%3.14%4.58%
7.)FRANKLIN RESOURCES INC1,685,187Cut -0.30%0.05%3.79%
8.)WASATCH ADVISORS INC1,297,841Cut -5.76%0.78%2.92%
9.)BLACKROCK INSTITUTIONAL TRUST COMPANY NA1,076,901Added 2.43%0.01%2.42%
10.)STATE STREET CORP1,066,704Cut -0.24%0.01%2.40%
11.)BLACKROCK FUND ADVISORS876,268Cut -5.52%0.02%1.97%
12.)CORTINA ASSET MANAGEMENT LLC554,995Cut -1.95%1.34%1.25%
13.)KESTREL INVESTMENT MANAGEMENT CORP551,400Cut -1.04%3.31%1.24%
14.)VAUGHAN NELSON SCARBOROUGH & MCCULLOUGH LP474,981Cut -2.81%1.03%1.07%
15.)CENTURY CAPITAL MANAGEMENT LLC474,756Added 31.12%0.86%1.07%
16.)BANK OF NEW YORK MELLON CORP457,856Added 10.33%0.01%1.03%
17.)GRANAHAN INVESTMENT MANAGEMENT INC MA441,720Added 0.57%0.73%0.99%
18.)VINIK ASSET MANAGEMENT L P423,261New0.37%0.95%
19.)MACKENZIE FINANCIAL CORP404,750Unchanged0.08%0.91%
20.)DIMENSIONAL FUND ADVISORS INC362,066Added 7.05%0.02%0.81%



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

No.FundSharesPut/CallActivity(Shr)% Port.% Out. Shrs
1.)KESTREL INVESTMENT MANAGEMENT CORP551,400Cut -1.04%3.31%1.24%
2.)KINGDOM RIDGE CAPITAL LLC150,000PUTNew3.23%0.34%
3.)COATUE MANAGEMENT LLC2,040,312Cut -5.53%3.14%4.58%
4.)ALPHAONE INVESTMENT SERVICES LLC205,800New3.04%0.46%
5.)IRVING MAGEE INVESTMENT MANAGEMENT65,200New2.05%0.15%
6.)S SQUARED TECHNOLOGY LLC203,800Cut -16.44%1.90%0.46%
7.)MANLEY ASSET MANAGEMENT L P15,700New1.45%0.04%
8.)CORTINA ASSET MANAGEMENT LLC554,995Cut -1.95%1.34%1.25%
9.)VAUGHAN NELSON SCARBOROUGH & MCCULLOUGH LP474,981Cut -2.81%1.03%1.07%
10.)CENTURY CAPITAL MANAGEMENT LLC474,756Added 31.12%0.86%1.07%
11.)AH LISANTI CAPITAL GROWTH LLC44,795New0.81%0.10%
12.)WASATCH ADVISORS INC1,297,841Cut -5.76%0.78%2.92%
13.)GRANAHAN INVESTMENT MANAGEMENT INC MA441,720Added 0.57%0.73%0.99%
14.)BLAIR WILLIAM & CO IL5,664,077Added 0.83%0.63%12.72%
15.)VINIK ASSET MANAGEMENT L P423,261New0.37%0.95%
16.)LORD ABBETT & CO LLC3,314,861Added 20.41%0.35%7.45%
17.)SPRINGBOK CAPITAL MANAGEMENT LLC18,800New0.34%0.04%
18.)COHEN KLINGENSTEIN LLC14,695Unchanged0.26%0.03%
19.)MARINER QUANTITATIVE SOLUTIONS LLC8,510New0.26%0.02%
20.)GRANITE INVESTMENT PARTNERS LLC18,381New0.22%0.04%

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

No.FundSharesPut/Call% Port.% Out. Shrs
1.)VINIK ASSET MANAGEMENT L P423,2610.37%0.95%
2.)ALPHAONE INVESTMENT SERVICES LLC205,8003.04%0.46%
3.)KINGDOM RIDGE CAPITAL LLC150,000PUT3.23%0.34%
4.)CASTLEARK MANAGEMENT LLC69,1250.12%0.16%
5.)IRVING MAGEE INVESTMENT MANAGEMENT65,2002.05%0.15%
6.)ARONSON & JOHNSON & ORTIZ LP46,0000.01%0.10%
7.)AH LISANTI CAPITAL GROWTH LLC44,7950.81%0.10%
8.)J P MORGAN CHASE & CO30,000CALL0.00%0.07%
9.)TWO SIGMA INVESTMENTS LLC29,7500.02%0.07%
10.)J P MORGAN CHASE & CO24,2920.00%0.05%
11.)SPRINGBOK CAPITAL MANAGEMENT LLC18,8000.34%0.04%
12.)GRANITE INVESTMENT PARTNERS LLC18,3810.22%0.04%
13.)FEDERATED INVESTORS INC PA 17,6670.00%0.04%
14.)WALLEYE TRADING LLC16,5270.01%0.04%
15.)MANLEY ASSET MANAGEMENT L P15,7001.45%0.04%
16.)OXFORD ASSET MANAGEMENT12,9230.01%0.03%
17.)CHICAGO EQUITY PARTNERS LLC10,2250.02%0.02%
18.)MARINER QUANTITATIVE SOLUTIONS LLC8,5100.26%0.02%
19.)TWO SIGMA ADVISERS LLC7,7000.02%0.02%
20.)JEFFERIES GROUP INC DE 5,6610.00%0.01%

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

No.FundSharesPut/Call% Port.% Out. Shrs
1.)ARTIS CAPITAL MANAGEMENT LP1,003,0001.98%2.25%
2.)TIMBER HILL LLC157,400CALL0.01%0.35%
3.)GW CAPITAL MANAGEMENT LLC93,0650.11%0.21%
4.)CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM85,0770.01%0.19%
5.)SIGMA CAPITAL MANAGEMENT LLC75,000CALL0.18%0.17%
6.)JACOBS LEVY EQUITY MANAGEMENT INC67,1000.04%0.15%
7.)TIMBER HILL LLC46,900PUT0.00%0.11%
8.)CAXTON ASSOCIATES LLC25,9350.04%0.06%
9.)SPINNER ASSET MANAGEMENT LLC25,000PUT0.27%0.06%
10.)CREDIT AGRICOLE S A22,4500.00%0.05%
11.)HOLT SMITH YATES ADVISORS INC18,6070.50%0.04%
12.)MIZUHO ASSET MANAGEMENT COLTD14,5000.08%0.03%
13.)NUVEEN HYDEPARK GROUP LLC10,3000.05%0.02%
14.)THREE ZERO THREE CAPITAL PARTNERS LLC6,3960.19%0.01%
15.)CTC FUND MANAGEMENT LLC5000.01%0.00%
16.)CONCERT WEALTH MANAGEMENT INC1200.00%0.00%