Is QSII a good stock to own? Find out who bought Quality Systems, who sold Quality Systems (QSII) stock, and who holds a large position in Quality Systems.

• Brown Capital Management owns 2.66M shares worth $49.26M
• Vanguard owns 2.50M shares worth $45.67M
• Neuberger Berman owns 2.28M shares worth $42.25M
• Cambiar Investors owns 1.58M shares worth $28.89M
• Schroder Investment Management owns 1.58M shares worth $28.78M
• Columbia Wanger Asset Management owns 1.52M shares worth $26.39M
• ING Groep N.V. owns 1.42M shares worth $26.04M
• ING Investment Management owns 1.15M shares worth $21.05M
• Fiera Capital Corporation owns 1.08M shares worth $30.04M
• Snow Capital Management owns 1.03M shares worth $18.76M
• CR Intrinsic Investors owns 1000000 shares worth $18.28M
• Renaissance Technologies owns 941976 shares worth $25.91M
• Advisors Asset Management owns 887546 shares worth $16.22M
• STATE STREET CORPORATION owns 854077 shares worth $15.61M
• New York State Common Retirement Fund owns 832862 shares worth $15.22M
• DePrince Race & Zollo owns 725050 shares worth $12.59M
• Inves owns 703755 shares worth $19.36M
• RIVER ROAD ASSET MANAGEMENT owns 679834 shares worth $12.60M
• Turner Investments owns 666392 shares worth $29.14M
• Manning & Napier Advisors owns 645080 shares worth $28.21M
• Decade Capital Management owns 635584 shares worth $11.61M
• BOSTON TRUST & INVESTMENT MANAGEMENT owns 587299 shares worth $21.72M
• Sentinel Asset Management owns 570780 shares worth $24.96M
• Millennium Management owns 561237 shares worth $10.25M
• S.A.C. Capital Advisors owns 558604 shares worth $10.21M
• GENEVA INVESTMENT MANAGEMENT OF CHICAGO owns 554353 shares worth $24.24M
• Century Capital Management owns 481232 shares worth $21.04M
• Ranger Investment Management owns 469470 shares worth $20.53M
• BTIM owns 432815 shares worth $18.93M
• Arbor Capital Management owns 381000 shares worth $16.66M
• Conestoga Capital Advisors owns 369140 shares worth $6.84M
• Montrusco Bolton Investment owns 367814 shares worth $10.12M
• Visium Asset Management owns 365128 shares worth $6.67M
• Stephens Investment Management owns 348327 shares worth $9.58M
• Norges Bank Investment Management owns 343702 shares worth $5.97M
• United Services Automobile Association owns 334000 shares worth $6.11M
• Gotham Asset Management owns 330359 shares worth $5.74M
• Frank Russell Company owns 327497 shares worth $5.65M
• Chartwell Investment Partners owns 312850 shares worth $13.68M
• RHUMBLINE ADVISERS owns 305254 shares worth $5.30M
• Columbus Circle Investors owns 299451 shares worth $13.09M
• CITADEL ADVISORS owns 260866 shares worth $4.53M
• NORRIS PERNE & FRENCH LLP/MI owns 238808 shares worth $6.57M

• Cadian Capital Management sold on Sept. 30, 2011
• Johnson Investment Counsel sold on June 30, 2011
• Damian Sousa sold on June 30, 2011
• Barclays sold on June 30, 2011
• Wells Fargo & Company sold on March 31, 2011
• FMR sold on Dec. 31, 2010
• TAMRO Capital Partners sold on Dec. 31, 2010
• Navellier & Associates sold on March 31, 2006

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