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

• Donald Smith & Co owns 3.65M shares worth $5.04M
• NWQ INVESTMENT MANAGEMENT owns 1.81M shares worth $3.16M
• Vanguard owns 1.21M shares worth $1.67M
• Verition Fund Management owns 1.07M shares worth $1.47M
• Allianz Global Investors of America owns 884100 shares worth $2.45M
• Driehaus Capital Management owns 869018 shares worth $2.41M
• Keane Capital Management owns 848297 shares worth $1.48M
• STATE STREET CORPORATION owns 688685 shares worth $950385
• Technical Financial Services owns 633152 shares worth $873749
• PanAgora Asset Management owns 509001 shares worth $427560
• GRT Capital Partners owns 453302 shares worth $380773
• Tanaka Capital Management owns 398851 shares worth $550414
• CalPERS owns 386085 shares worth $532797
• MOORE CAPITAL MANAGEMENT owns 375000 shares worth $517500
• D. E. Shaw & Co owns 301910 shares worth $253604
• ALGERT COLDIRON INVESTORS owns 294910 shares worth $286062
• Diker Management owns 272632 shares worth $755190
• Batterymarch Financial Management owns 263130 shares worth $460477
• TIAA-CREF Investment Management owns 261229 shares worth $360496
• Frank Russell Company owns 248400 shares worth $427248
• Jacobs Levy Equity Management owns 239502 shares worth $330512
• Renaissance Technologies owns 230318 shares worth $193467
• Deere & Company owns 222085 shares worth $388648
• Oxford Asset Management owns 211013 shares worth $584506
• Millennium Management owns 210052 shares worth $581844
• Geode Capital Management owns 191236 shares worth $263905
• Charles Schwab Investment Management owns 185000 shares worth $175750
• E E Geduld owns 184700 shares worth $254886
• UBS AG owns 180158 shares worth $499037
• Bridgeway Capital Management owns 170100 shares worth $142884

• T. Rowe Price Associates sold on Dec. 31, 2011
• Artis Capital Management, L P sold on Sept. 30, 2011
• Shannon River Fund Management sold on Sept. 30, 2011
• Magnetar Financial sold on June 30, 2011
• Needham Investment Management sold on June 30, 2011
• SMITH ASSET MANAGEMENT sold on March 31, 2011
• TCW sold on March 31, 2011
• M^T Bank Corporation sold on March 31, 2011
• FMR sold on Dec. 31, 2010
• Bascom Hill Partners sold on Dec. 31, 2010
• Harvey Partners sold on Dec. 31, 2010
• GOLDMAN SACHS sold on Dec. 31, 2010
• Manulife Asset Management sold on Dec. 31, 2008
• Navellier & Associates sold on Dec. 31, 2003