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Institutional Holdings of BERKSHIRE HATHAWAY INC. CL B (BRK-B) on 12/31/2011

1. Company Information

Company/StockBERKSHIRE HATHAWAY INC. CL B (stock symbol: BRK-B)
Funds Ownership1050 out of total 3028 funds (35%) own this stock
Funds own total 609,402,243 shares, 36933.47% of all outstanding shares
Funds SOLD -13,364,196 shares (-2.15%) in the quarter ended on 12/31/2011

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

No.FundSharesPut/CallActivity(Shr)% Port.% Out. Shrs
1.)BILL & MELINDA GATES FOUNDATION TRUST91,204,077Cut -5.20%45.36%5527.52%
2.)STATE STREET CORP65,018,814Added 2.26%0.88%3940.53%
3.)VANGUARD GROUP INC47,544,612Added 1.65%0.57%2881.49%
4.)BLACKROCK INSTITUTIONAL TRUST COMPANY NA45,191,878Added 8.01%0.88%2738.90%
5.)FMR LLC18,624,566Added 14.80%0.29%1128.76%
6.)NORTHERN TRUST CORP18,145,599Cut -0.08%0.72%1099.73%
7.)BANK OF NEW YORK MELLON CORP17,275,417Added 6.08%0.55%1046.99%
8.)GEODE CAPITAL MANAGEMENT LLC12,187,192Added 1.62%1.12%738.62%
9.)BLACKROCK FUND ADVISORS11,470,970Added 2.37%0.47%695.21%
10.)J P MORGAN CHASE & CO6,537,722Cut -18.18%0.23%396.23%
11.)BLACKROCK GROUP LTD6,281,685Cut -1.22%0.40%380.71%
12.)NEW YORK STATE COMMON RETIREMENT FUND5,896,782Cut -0.08%0.88%357.38%
13.)MORGAN STANLEY5,758,151Added 9.25%0.27%348.98%
14.)PRICE T ROWE ASSOCIATES INC MD 5,642,306Cut -2.12%0.15%341.96%
15.)GOLDMAN SACHS GROUP INC5,331,099Cut -9.78%0.21%323.10%
16.)PRIMECAP MANAGEMENT CO CA 5,255,600Cut -0.34%0.64%318.52%
17.)NEW YORK STATE TEACHERS RETIREMENT SYSTEM4,744,824Cut -0.12%1.03%287.57%
18.)LEGAL & GENERAL GROUP PLC4,451,309Cut -0.30%0.63%269.78%
19.)BANK OF AMERICA CORP DE 4,388,896Cut -24.46%0.21%265.99%
20.)D E SHAW & CO INC4,209,167Added 62.08%0.87%255.10%



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

No.FundSharesPut/CallActivity(Shr)% Port.% Out. Shrs
1.)CHEVIOT VALUE MANAGEMENT INC274,112Added 0.79%100.00%16.61%
2.)FACTORY MUTUAL INSURANCE CO260,000Unchanged80.92%15.76%
3.)ASSET MANAGEMENT GROUP INC3,720New73.76%0.23%
4.)BILL & MELINDA GATES FOUNDATION TRUST91,204,077Cut -5.20%45.36%5527.52%
5.)CHECK CAPITAL MANAGEMENT INC CA1,414,999Added 2.35%30.76%85.76%
6.)GREYLIN INVESTMENT MANGEMENT INC867,142Added 0.93%25.30%52.55%
7.)ORBITRONIX LP397,000New24.87%24.06%
8.)TRAFELET & CO UK LLP1,316,257Cut -6.14%23.52%79.77%
9.)SHAYNE & CO LLC266,597Cut -0.42%21.41%16.16%
10.)PACIFICA CAPITAL INVESTMENTS LLC280,672Cut -0.53%17.66%17.01%
11.)SEMPER AUGUSTUS INVESTMENTS GROUP LLC345,003Added 0.09%16.15%20.91%
12.)COOK & BYNUM CAPITAL MANAGEMENT LLC246,700New14.88%14.95%
13.)PABRAI MOHNISH444,941Added 4,599.92%14.41%26.97%
14.)MRAZ AMERINE & ASSOCIATES INC236,563New14.12%14.34%
15.)CONSULTA LTD563,713Added 40.67%13.65%34.16%
16.)BUDROS RUHLIN & ROE INC345,760Added 1.72%13.00%20.96%
17.)ACCOUNT MANAGEMENT LLC140,194Cut -11.79%11.69%8.50%
18.)DALTON INVESTMENTS LLC370,950Cut -11.88%11.67%22.48%
19.)BARR E S & CO864,740Cut -1.07%10.94%52.41%
20.)WINTERGREEN ADVISERS LLC833,623Unchanged10.87%50.52%

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

No.FundSharesPut/Call% Port.% Out. Shrs
1.)SQ ADVISORS LLC884,1039.19%53.58%
2.)STATE OF NEW JERSEY COMMON PENSION FUND A700,0000.31%42.42%
3.)TD SECURITIES (USA) LLC564,2681.15%34.20%
4.)D E SHAW & CO INC515,000PUT0.11%31.21%
5.)CREATIVE PLANNING407,0052.75%24.67%
6.)ORBITRONIX LP397,00024.87%24.06%
7.)FJARDE AP FONDEN (THE FOURTH SWEDISH NATIONAL PENSIONFUND)303,2340.55%18.38%
8.)COOK & BYNUM CAPITAL MANAGEMENT LLC246,70014.88%14.95%
9.)MRAZ AMERINE & ASSOCIATES INC236,56314.12%14.34%
10.)ANDRA AP FONDEN172,0000.43%10.42%
11.)WESTPAC BANKING CORP163,9590.24%9.94%
12.)FINANCIAL NETWORK156,8161.91%9.50%
13.)MARSHALL WACE LLP153,3642.36%9.29%
14.)LADENBURG THALMANN FINANCIAL SERVICES INC138,0310.55%8.37%
15.)ORIZON INVESTMENT COUNSEL LLC129,3839.41%7.84%
16.)KKR ASSET MANAGEMENT LLC119,3003.52%7.23%
17.)GOODHAVEN CAPITAL MANAGEMENT LLC114,9787.65%6.97%
18.)GREENBRIER PARTNERS CAPITAL MANAGEMENT LLC100,0004.54%6.06%
19.)PARTNERRE ASSET MANAGEMENT CORP79,9811.00%4.85%
20.)HENDERSHOT INVESTMENTS INC79,2100.30%4.80%

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

No.FundSharesPut/Call% Port.% Out. Shrs
1.)TIAA CREF INVESTMENT MANAGEMENT LLC7,894,4800.59%478.45%
2.)BROWN BROTHERS HARRIMAN & CO4,639,2563.29%281.17%
3.)RENAISSANCE TECHNOLOGIES LLC1,212,4000.37%73.48%
4.)TEACHERS ADVISORS INC1,099,7690.40%66.65%
5.)WEDGEWOOD PARTNERS INC706,5357.33%42.82%
6.)ORBITRONIX LP397,000CALL23.77%24.06%
7.)MM CAPITAL LLC364,800PUT0.63%22.11%
8.)DOUGLASS WINTHROP ADVISORS LLC337,1704.27%20.43%
9.)MITSUBISHI UFJ SECURITIES CO LTD250,3308.21%15.17%
10.)UBS OCONNOR LLC214,7590.28%13.02%
11.)CALAMOS ADVISORS LLC200,0000.07%12.12%
12.)GW CAPITAL MANAGEMENT LLC181,1100.44%10.98%
13.)ROYAL LONDON ASSET MANAGEMENT LTD176,7510.61%10.71%
14.)KOHLBERG KRAVIS ROBERTS & CO156,7000.11%9.50%
15.)BAXTER BROS INC152,31710.63%9.23%
16.)JHL CAPITAL GROUP LLC110,000CALL0.81%6.67%
17.)AXA FINANCIAL INC103,7590.05%6.29%
18.)ING INVESTMENT MANAGEMENT (EUROPE) BV101,6800.08%6.16%
19.)MM CAPITAL LLC101,5700.17%6.16%
20.)GREENBRIER PARTNERS LTD100,0004.90%6.06%