Is Platinum Underwriter/ptp a good stock to own? Find out who bought Platinum Underwriter/ptp, who sold Platinum Underwriter/ptp stock, and who holds a large position in Platinum Underwriter/ptp.

• Donald Smith & Co owns 2.99M shares worth $167.12M
• Vanguard owns 1.91M shares worth $106.48M
• Artisan Partners Holdings owns 1.69M shares worth $56.18M
• ALLIANCEBERNSTEIN owns 1.33M shares worth $74.33M
• Prospector Partners owns 1.30M shares worth $72.69M
• Artisan Partners Limited Partnership owns 1.23M shares worth $68.39M
• Macquarie owns 1.07M shares worth $59.68M
• Ameriprise Financial owns 970017 shares worth $36.96M
• Robeco Investment Management owns 914275 shares worth $51.03M
• Inves owns 791839 shares worth $28.90M
• Wellington Management Company owns 756071 shares worth $42.20M
• STATE STREET CORPORATION owns 750683 shares worth $41.89M
• Dalton Investments owns 713275 shares worth $24.33M
• CITADEL ADVISORS owns 615959 shares worth $34.38M
• Lee Munder Capital owns 600141 shares worth $33.49M
• Brandywine Global Investment Management owns 555385 shares worth $31.00M
• Dreman Value Management owns 535914 shares worth $29.91M
• Cramer Rosenthal McGlynn owns 492775 shares worth $22.67M
• Royce & Associates owns 454406 shares worth $20.90M
• Eugene S. Stark owns 435000 shares worth $16.57M

• Hunter Global Investors sold on Sept. 30, 2011
• Alyeska Investment sold on Sept. 30, 2011
• Canada Pension Plan Investment Board sold on March 31, 2011
• AQR Capital Management sold on March 31, 2011
• FMR sold on Dec. 31, 2010
• FRED ALGER MANAGEMENT sold on Dec. 31, 2010
• Epoch Investment Partners sold on Dec. 31, 2010
• S.A.C. Capital Advisors sold on Sept. 30, 2009
• Akre Capital Management sold on March 31, 2005