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Institutional Holdings of AMERISOURCEBERGEN CORP. (ABC) on 12/31/2011

1. Company Information

Company/StockAMERISOURCEBERGEN CORP. (stock symbol: ABC)
Funds Ownership416 out of total 3028 funds (14%) own this stock
Funds own total 213,394,356 shares, 82.77% of all outstanding shares
Funds SOLD -14,921,360 shares (-6.54%) in the quarter ended on 12/31/2011

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

No.FundSharesPut/CallActivity(Shr)% Port.% Out. Shrs
1.)VANGUARD GROUP INC15,485,020Cut -1.71%0.09%6.01%
2.)STATE STREET CORP9,774,885Cut -4.01%0.06%3.79%
3.)BLACKROCK ADVISORS LLC9,231,114Added 1.54%0.38%3.58%
4.)JANUS CAPITAL MANAGEMENT LLC7,268,981New0.31%2.82%
5.)BLACKROCK INSTITUTIONAL TRUST COMPANY NA7,158,304Added 7.41%0.07%2.78%
6.)ARBITRAGE & TRADING MANAGEMENT CO6,996,200Unchanged6.95%2.71%
7.)J P MORGAN CHASE & CO6,132,136Added 20.32%0.11%2.38%
8.)WELLINGTON MANAGEMENT CO LLP6,011,221Cut -17.45%0.09%2.33%
9.)AMERIPRISE FINANCIAL INC5,721,578Cut -18.37%0.16%2.22%
10.)PRICE T ROWE ASSOCIATES INC MD 5,212,294Cut -30.37%0.07%2.02%
11.)MONTAG & CALDWELL INC4,677,243Cut -0.95%1.58%1.81%
12.)INVESTEC ASSET MANAGEMENT LTD4,198,085Added 1.13%1.57%1.63%
13.)ARONSON & JOHNSON & ORTIZ LP3,916,700Cut -2.37%0.77%1.52%
14.)NORTHERN TRUST CORP3,608,916Cut -4.53%0.07%1.40%
15.)BANK OF NEW YORK MELLON CORP3,316,708Cut -5.50%0.05%1.29%
16.)ROBECO INVESTMENT MANAGEMENT INC3,214,116Added 72.31%0.59%1.25%
17.)BLACKROCK GROUP LTD2,990,247Cut -3.46%0.09%1.16%
18.)WELLS FARGO & CO MN2,974,986Added 77.85%0.08%1.15%
19.)BLACKROCK FUND ADVISORS2,932,301Cut -4.02%0.06%1.14%
20.)FMR LLC2,802,738Added 3.09%0.02%1.09%



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

No.FundSharesPut/CallActivity(Shr)% Port.% Out. Shrs
1.)ARBITRAGE & TRADING MANAGEMENT CO6,996,200Unchanged6.95%2.71%
2.)KDI CAPITAL PARTNERS LLC451,342Added 55.40%5.57%0.18%
3.)DARRELL & KING INVESTMENT COUNSEL LLC387,804Cut -7.68%3.48%0.15%
4.)WILLIAM HARRIS INVESTORS INC278,800Added 14.03%3.43%0.11%
5.)ASSET MANAGEMENT INVESTORS LLC217,730Added 5.76%3.35%0.08%
6.)HAYS ADVISORY LLC497,769Cut -6.97%3.01%0.19%
7.)GUYASUTA INVESTMENT ADVISORS INC336,814Added 0.57%2.64%0.13%
8.)VISION CAPITAL MANAGEMENT INC264,000New2.52%0.10%
9.)ARCHIPEL ASSET MANAGEMENT AB204,496New2.25%0.08%
10.)CHASE INVESTMENT COUNSEL CORP333,310Cut -23.59%2.21%0.13%
11.)ANALYTIC INVESTORS INC CA2,358,122Added 22.45%2.05%0.91%
12.)CONATUS CAPITAL MANAGEMENT LP1,330,598Cut -19.49%1.98%0.52%
13.)DENALI ADVISORS LLC362,600Unchanged1.75%0.14%
14.)CHANNING CAPITAL MANAGEMENT LLC386,418Cut -11.08%1.72%0.15%
15.)WESTOVER CAPITAL ADVISORS LLC33,412Cut -41.79%1.62%0.01%
16.)MONTAG & CALDWELL INC4,677,243Cut -0.95%1.58%1.81%
17.)RENAISSANCE GROUP LLC1,331,696New1.58%0.52%
18.)INVESTEC ASSET MANAGEMENT LTD4,198,085Added 1.13%1.57%1.63%
19.)FOX ASSET MANAGEMENT LLC273,565Cut -4.39%1.51%0.11%
20.)ATIVO CAPITAL MANAGEMENT LLC34,935Added 20.85%1.45%0.01%

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

No.FundSharesPut/Call% Port.% Out. Shrs
1.)JANUS CAPITAL MANAGEMENT LLC7,268,9810.31%2.82%
2.)RENAISSANCE GROUP LLC1,331,6961.58%0.52%
3.)MADISON SQUARE INVESTORS LLC534,2770.21%0.21%
4.)BARING ASSET MANAGEMENT INC MA 386,8110.68%0.15%
5.)VISION CAPITAL MANAGEMENT INC264,0002.52%0.10%
6.)ARCHIPEL ASSET MANAGEMENT AB204,4962.25%0.08%
7.)VIKING GLOBAL INVESTORS LP169,9000.07%0.07%
8.)BRIDGEWATER ASSOCIATES INC162,0100.10%0.06%
9.)ANDRA AP FONDEN156,6000.19%0.06%
10.)TWO SIGMA ADVISERS LLC154,7760.35%0.06%
11.)WESTPAC BANKING CORP144,2220.10%0.06%
12.)S&T BANK PA143,1701.36%0.06%
13.)EASTERN BANK121,8630.54%0.05%
14.)FJARDE AP FONDEN (THE FOURTH SWEDISH NATIONAL PENSIONFUND)94,9110.08%0.04%
15.)VAN ECK ASSOCIATES CORP84,3230.02%0.03%
16.)TD SECURITIES (USA) LLC82,9180.08%0.03%
17.)TRAXIS PARTNERS LP65,3850.56%0.03%
18.)ZURCHER KANTONALBANK (ZURICH CANTONALBANK)45,0160.08%0.02%
19.)RICHARD BERNSTEIN ADVISORS LLC40,2180.56%0.02%
20.)AYER CAPITAL MANAGEMENT LP30,1000.63%0.01%

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

No.FundSharesPut/Call% Port.% Out. Shrs
1.)JANUS CAPITAL MANAGEMENT LLC7,844,5570.36%3.04%
2.)TIAA CREF INVESTMENT MANAGEMENT LLC3,799,5850.15%1.47%
3.)AXA FINANCIAL INC2,046,5450.50%0.79%
4.)SAMLYN CAPITAL LLC1,142,8001.67%0.44%
5.)MADISON SQUARE INVESTORS LLC842,5290.35%0.33%
6.)EAGLE ASSET MANAGEMENT INC464,4780.18%0.18%
7.)FRONTIER CAPITAL MANAGEMENT CO INC458,1900.21%0.18%
8.)GOODMAN & COMPANY INVESTMENT COUNSEL LTD396,0000.08%0.15%
9.)TEACHERS ADVISORS INC375,2820.07%0.15%
10.)TIMBER HILL LLC202,300CALL0.02%0.08%
11.)BP PLC156,8000.41%0.06%
12.)S&T BANK PA143,7231.69%0.06%
13.)LOWE BROCKENBROUGH & CO INC139,3801.30%0.05%
14.)CAXTON ASSOCIATES LLC134,2330.24%0.05%
15.)ING INVESTMENT MANAGEMENT (EUROPE) BV125,3910.05%0.05%
16.)TIMBER HILL LLC102,800PUT0.01%0.04%
17.)GOLDEN CAPITAL MANAGEMENT LLC95,9390.21%0.04%
18.)SPARK LP DE70,6000.85%0.03%
19.)NEW CENTURY INVESTMENT MANAGEMENT INC45,2111.43%0.02%
20.)WESTLB MELLON ASSET MANAGEMENT KAPITALANLAGEGESSELLSCHAFT MB33,9000.85%0.01%