Is APKT a good stock to own? Find out who bought Acme Packet, who sold Acme Packet (APKT) stock, and who holds a large position in Acme Packet.

• Wellington Management Company owns 9.95M shares worth $220.14M
• Bank of America Corporation owns 3.35M shares worth $74.17M
• Mason Capital Management owns 3.29M shares worth $96.25M
• Vanguard owns 3.12M shares worth $91.27M
• AQR Capital Management owns 3.02M shares worth $88.11M
• T. Rowe Price Associates owns 2.50M shares worth $73.00M
• Harvard Management Company owns 2.23M shares worth $65.14M
• ING Groep N.V. owns 1.98M shares worth $58.03M
• TAMRO Capital Partners owns 1.88M shares worth $41.49M
• ALLIANCEBERNSTEIN owns 1.85M shares worth $40.98M
• Zevenbergen Capital Investments owns 1.83M shares worth $50.29M
• Gabelli Funds owns 1.78M shares worth $51.92M
• STATE STREET CORPORATION owns 1.76M shares worth $51.46M
• Brookside Capital Management, LLC* owns 1.72M shares worth $53.03B
• Tyrus Capital S.A.M. owns 1.68M shares worth $49.12M
• Cornerstone Capital Management owns 1.40M shares worth $31.05M
• GOLDMAN SACHS owns 1.40M shares worth $30.89M
• Turner Investments owns 1.33M shares worth $36.72M
• Franklin Resources owns 1.25M shares worth $36.52M
• Allianz Global Investors of America owns 1.18M shares worth $32.50M
• PEAK6 Investments owns 1.18M shares worth $26.06M
• Frank Russell Company owns 1.15M shares worth $24.36M
• ING Investment Management owns 1.04M shares worth $17.77M
• Criterion Capital Management owns 1000000 shares worth $27.52M
• Scopia Management owns 902606 shares worth $19.97M
• Dorsal Capital Management owns 900000 shares worth $15.39B
• Sentinel Asset Management owns 868450 shares worth $23.90M
• Inves owns 854271 shares worth $14.61M
• GAMCO Asset Management owns 851100 shares worth $24.89M
• Daniel D. Thurber owns 801366 shares worth $17.73M
• GRANAHAN INVESTMENT MANAGEMENT INC/MA owns 791400 shares worth $17.51M
• Robeco Institutional Asset Management B V owns 787540 shares worth $13.47M
• Renaissance Technologies owns 777900 shares worth $22.75M
• Shannon River Fund Management owns 762300 shares worth $16.86M
• Jericho Capital Asset Management owns 762080 shares worth $16.86M
• Artis Capital Management, L P owns 758375 shares worth $12.97M
• S.A.C. Capital Advisors owns 736769 shares worth $22.77M
• TimesSquare Capital Management owns 726600 shares worth $20.00M
• Allianz Asset Management AG owns 715260 shares worth $15.82M
• Century Capital Management owns 682649 shares worth $21.10M
• ING Investment Management Co Address: 10 State House Square owns 682000 shares worth $18.77M
• Sageview Capital owns 681132 shares worth $11.65M

• Alydar Partners sold on Sept. 30, 2011
• Wells Fargo & Company sold on Sept. 30, 2011
• Columbus Circle Investors sold on Sept. 30, 2011
• Ameriprise Financial sold on June 30, 2011
• Marsico Capital Management sold on June 30, 2011
• Name Goodman & Company, Investment Counsel sold on June 30, 2011
• FRIESS ASSOCIATES sold on June 30, 2011
• RCM Capital Management sold on June 30, 2011
• Coatue Management sold on June 30, 2011
• FMR sold on Dec. 31, 2010
• Next Century Growth Investors sold on Dec. 31, 2010
• Kingdon Capital Management sold on Dec. 31, 2010
• Level Management sold on June 30, 2010
• Tiger Global Management sold on Dec. 31, 2006

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