Is RBCN a good stock to own? Find out who bought Rubicon Technology, who sold Rubicon Technology (RBCN) stock, and who holds a large position in Rubicon Technology.

• Sparta Asset Management owns 2.24M shares worth $22.89M
• Royce & Associates owns 1.37M shares worth $9.01M
• Signia Capital Management owns 1.34M shares worth $8.86M
• Vanguard owns 768281 shares worth $5.07M
• Tocqueville Asset Management owns 763438 shares worth $5.04M
• OHIO PERS owns 550615 shares worth $5.74M
• Ariel Investments owns 545571 shares worth $3.60M
• Roxbury Capital Management owns 387905 shares worth $3.96M
• Lapides Asset Management owns 355100 shares worth $2.34M
• STATE STREET CORPORATION owns 342196 shares worth $2.26M
• Invicta Capital Management owns 335000 shares worth $3.42M
• Antipodean Advisors owns 315112 shares worth $3.02M
• AlphaOne Investment Services owns 304223 shares worth $1.86M
• D.A. Davidson & Co. owns 303365 shares worth $2.91M
• GMT Capital owns 299451 shares worth $2.81M
• Irving Magee Investment Management owns 293080 shares worth $1.90M
• GAM Holding owns 254200 shares worth $2.65M
• Frank Russell Company owns 253710 shares worth $2.44M
• Kingdom Ridge Capital owns 250000 shares worth $1.65M
• Ecofin owns 249328 shares worth $1.65M
• Inves owns 219782 shares worth $1.45M
• Chinook Capital Management owns 190146 shares worth $1.16M
• Schroder Investment Management owns 179400 shares worth $1.87M
• Aegis Financial Corporation owns 175230 shares worth $1.16M
• Artis Capital Management, L P owns 149604 shares worth $1.56M
• CalPERS owns 142320 shares worth $939312

• First Trust Advisors sold on Dec. 31, 2011
• GOLDMAN SACHS sold on Sept. 30, 2011
• Barclays sold on Sept. 30, 2011
• DnB NOR Asset Management AS sold on Sept. 30, 2011
• SAM Sustainable Asset Management sold on June 30, 2011
• Hound Partners sold on June 30, 2011
• Tiger Global Management sold on June 30, 2011
• Robeco Institutional Asset Management B V sold on June 30, 2011
• North Run Capital sold on June 30, 2011
• Valinor Management sold on June 30, 2011
• 7X7 Asset Management sold on June 30, 2011
• Credit Suisse AG sold on June 30, 2011
• Allianz Global Investors of America sold on March 31, 2011
• BAM sold on March 31, 2011
• Kleinheinz Capital Partners sold on March 31, 2011
• UBS AG sold on March 31, 2011
• AH Lisanti Capital Growth sold on March 31, 2011
• T. Rowe Price Associates sold on March 31, 2011
• Porter Orlin sold on March 31, 2011
• Meru Capital sold on March 31, 2011
• DekaBank Deutsche Girozentrale sold on March 31, 2011
• Acuity Investment Management sold on March 31, 2011
• Magnetar Financial sold on March 31, 2011
• SIT INVESTMENT ASSOCIATES sold on March 31, 2011
• FMR sold on Dec. 31, 2010
• Zevenbergen Capital Investments sold on Dec. 31, 2010
• Ardsley Advisory Partners sold on Dec. 31, 2010
• Adage Capital Partners GP sold on Dec. 31, 2010
• Empire Capital Management sold on Dec. 31, 2010
• Mason Street Advisors sold on Dec. 31, 2010
• Perimeter Capital Partners sold on Dec. 31, 2010
• ING Investment Management sold on Dec. 31, 2010
• Brown Advisory Holdings Incorporated sold on Dec. 31, 2010
• WALL STREET ASSOCIATES sold on Dec. 31, 2010
• PEAK6 Investments sold on Dec. 31, 2010
• Straus Capital Management sold on Dec. 31, 2010
• Perella Weinberg Partners Capital Management sold on Dec. 31, 2010
• Manulife Asset Management sold on Sept. 30, 2008

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