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

• Royce & Associates owns 4.12M shares worth $92.48M
• Jennison Associates owns 2.05M shares worth $45.93M
• Wells Fargo & Company owns 1.91M shares worth $39.31M
• Vanguard owns 1.85M shares worth $41.57M
• Cortina Asset Management owns 1.22M shares worth $25.40M
• T. Rowe Price Associates owns 1.18M shares worth $26.47M
• Heartland Advisors owns 1.10M shares worth $25.68M
• Investment Counselors of Maryland owns 1.03M shares worth $23.17M
• Ameriprise Financial owns 1.01M shares worth $20.78M
• Raging Capital Management owns 751000 shares worth $16.84M
• KALMAR INVESTMENTS INC /DE/ owns 638546 shares worth $14.32M
• STATE STREET CORPORATION owns 632656 shares worth $14.18M
• Schneider Capital Management Corporation owns 437009 shares worth $9.80M
• First Trust Advisors owns 409872 shares worth $9.19M
• GRANAHAN INVESTMENT MANAGEMENT INC/MA owns 397606 shares worth $8.92M
• Westfield Capital Management Company owns 395252 shares worth $8.87M
• Talara Capital Management owns 374699 shares worth $8.40M

• Invicta Capital Management sold on Sept. 30, 2011
• Frontier Capital Management sold on Sept. 30, 2011
• MICHAEL R. MURPHY sold on March 31, 2011
• FMR sold on Dec. 31, 2010
• Muhlenkamp & Company sold on Sept. 30, 2004

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