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

• Artisan Partners Holdings owns 2.77M shares worth $48.25M
• Nokomis Capital owns 2.04M shares worth $6.67M
• Clinton owns 1.84M shares worth $6.00M
• Wellington Management Company owns 1.70M shares worth $15.91M
• Schroder Investment Management owns 1.44M shares worth $4.70M
• LSV Asset Management owns 967862 shares worth $3.16M
• Robeco Investment Management owns 917912 shares worth $8.61M
• ARONSON JOHNSON ORTIZ owns 886100 shares worth $11.68M
• Ameriprise Financial owns 870336 shares worth $11.47M
• Renaissance Technologies owns 808554 shares worth $2.64M
• Vanguard owns 784277 shares worth $2.56M
• Technical Financial Services owns 783660 shares worth $2.56M
• Royce & Associates owns 668210 shares worth $1.72M
• Damian Sousa owns 608105 shares worth $6.50M
• Eagle Boston Investment Management owns 588468 shares worth $1.92B
• SG Americas Securities owns 574693 shares worth $1.48M
• STATE STREET CORPORATION owns 516328 shares worth $1.69M
• Karamaan owns 499377 shares worth $4.83M
• Artisan Partners Limited Partnership owns 465801 shares worth $1.52M
• KENSICO CAPITAL MANAGEMENT owns 396620 shares worth $4.24M
• Wynnefield Capital owns 370000 shares worth $4.68M
• Bridgeway Capital Management owns 364300 shares worth $936251
• First Trust Advisors owns 363375 shares worth $1.19M
• DLS Capital Management owns 342390 shares worth $4.51M
• Wynnefield Capital Management owns 330000 shares worth $3.05M
• Oppenheimer & Co owns 318139 shares worth $4.19M
• Fifth Third Asset Management owns 276161 shares worth $709733
• CalPERS owns 255993 shares worth $837097
• Norges Bank Investment Management owns 246558 shares worth $633654
• TIAA-CREF Investment Management owns 233423 shares worth $763293
• CITADEL ADVISORS owns 232686 shares worth $598003
• Inves owns 228943 shares worth $2.79M
• American Century Companies owns 228105 shares worth $745903
• Gotham Asset Management owns 228053 shares worth $745733

• Wells Fargo & Company sold on Sept. 30, 2011
• Thomson Horstmann & Bryant, Inc." sold on June 30, 2011
• Roxbury Capital Management sold on June 30, 2011
• Waddell & Reed Financial sold on June 30, 2011
• Thompson, Siegel, & Walmsley sold on March 31, 2011
• Perimeter Capital Partners sold on March 31, 2011
• New Mountain Vantage Advisers sold on Dec. 31, 2010
• Coatue Management sold on Dec. 31, 2010
• D. E. Shaw & Co sold on Dec. 31, 2010
• J P MORGAN CHASE & CO sold on Dec. 31, 2010
• DnB NOR Asset Management AS sold on Dec. 31, 2010
• Kleinheinz Capital Partners sold on Dec. 31, 2010
• Manufacturers Life Insurance Company sold on Sept. 30, 2010
• S.A.C. Capital Advisors sold on Sept. 30, 2009

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