Is QTM a good stock to own? Find out who bought Quantum Corporation, who sold Quantum Corporation (QTM) stock, and who holds a large position in Quantum Corporation.

• STARBOARD VALUE owns 24.02M shares worth $30.75M
• Private Capital Management owns 20.23M shares worth $25.90M
• Porter Orlin owns 18.07M shares worth $23.13M
• Vanguard owns 13.44M shares worth $17.21M
• Wells Fargo & Company owns 11.23M shares worth $28.08M
• Cramer Rosenthal McGlynn owns 10.34M shares worth $13.23M
• NorthPointe Capital owns 8.78M shares worth $10.89M
• Nokomis Capital owns 7.71M shares worth $9.87M
• Heather K. Mellem, Esq. owns 6.01M shares worth $15.76M
• STATE STREET CORPORATION owns 4.14M shares worth $5.30M
• Neuberger Berman owns 2.86M shares worth $3.66M
• Thomas Weisel Asset Management owns 2.60M shares worth $3.23M
• Timberline Asset Management owns 2.54M shares worth $3.26M
• FRIESS ASSOCIATES owns 2.40M shares worth $6.28M
• Teachers Advisors owns 2.32M shares worth $6.08M
• Artis Capital Management, L P owns 2.24M shares worth $2.78M
• Ameriprise Financial owns 2.14M shares worth $4.30M
• TIAA-CREF Investment Management owns 1.98M shares worth $2.53M
• WEISS MULTI-STRATEGY ADVISERS owns 1.86M shares worth $3.78M
• Newland Capital Management owns 1.72M shares worth $4.50M
• ESSEX INVESTMENT MANAGEMENT owns 1.54M shares worth $3.70M
• AQR Capital Management owns 1.52M shares worth $1.94M
• GOLDMAN SACHS owns 1.49M shares worth $1.85M
• LionEye Capital Management owns 1.37M shares worth $1.70M
• LionEye Capital Management owns 1.37M shares worth $1.70M
• Decade Capital Management owns 1.31M shares worth $3.42M
• Millennium Management owns 1.24M shares worth $1.59M
• Wellington Management Company owns 1.18M shares worth $1.50M
• Oxford Asset Management owns 1.11M shares worth $1.43M
• Technical Financial Services owns 986084 shares worth $2.37M
• J. Carlo Cannell owns 952338 shares worth $1.93M
• Geode Capital Management owns 950269 shares worth $1.22M

• Silver Lake sold on Sept. 30, 2011
• Roxbury Capital Management sold on Sept. 30, 2011
• O.S.S. Capital Management sold on Sept. 30, 2011
• Invicta Capital Management sold on June 30, 2011
• S Squared Technology sold on June 30, 2011
• Palisade Capital Management sold on June 30, 2011
• Chesapeake Partners Management sold on March 31, 2011
• Regiment Capital Management sold on March 31, 2011
• Meru Capital sold on March 31, 2011
• S.A.C. Capital Advisors sold on March 31, 2011
• Waddell & Reed Financial sold on March 31, 2011
• Alkeon Capital Management sold on March 31, 2011
• FMR sold on Dec. 31, 2010
• Polar Securities sold on Dec. 31, 2010
• Cupps Capital Management sold on Dec. 31, 2010
• Whale Rock Capital Management sold on Dec. 31, 2010
• Tudor Investment Corporation sold on March 31, 2000

• EXCO Resources (XCO)
• Seacor Holdings (CKH)
• JPMorgan Chase & Co. (JPM)
• MasterCard Incorporated (MA)
• Bank of America Corporation (BAC)
• SLM Corporation (SLM)
• BioMarin Pharmaceutical (BMRN)
• Cisco Systems (CSCO)
• Mentor Graphics Corporation (MENT)
• Apollo (APOL)
• QUALCOMM (QCOM)
• Quantum Corporation (QTM)
• Comverse Technology (CMVT)
• Ares Capital Corporation (ARCC)
• Lam Research Corporation (LRCX)
• MicroStrategy Incorporated (MSTR)
• Tessera Technologies (TSRA)
• United Therapeutics Corporation (UTHR)
• Independence Holding Company (IHC)
• Market Vectors Junior Gold Miners ETF (GDXJ)
• Warwick Valley Telephone Company (WWVY)