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

• Paradigm Capital Management owns 6.64M shares worth $14.01M
• Wellington Management Company owns 3.08M shares worth $6.50M
• Austin W. Marxe and David M. Greenhouse owns 2.79M shares worth $4.60M
• Vanguard owns 2.21M shares worth $4.65M
• Deerfield Management Company owns 1.45M shares worth $3.06M
• Broadfin Capital owns 869217 shares worth $1.50M
• Ameriprise Financial owns 836444 shares worth $1.54M
• STATE STREET CORPORATION owns 791387 shares worth $1.67M
• Dr. Jeffrey R. Jay, M.D owns 600000 shares worth $990000
• "Perkins Capital Management, Inc." owns 451650 shares worth $745222
• Mazama Capital Management owns 427302 shares worth $705048
• ESSEX INVESTMENT MANAGEMENT owns 373392 shares worth $787857
• Adage Capital Partners GP owns 324575 shares worth $684853
• Daniels & Tansey owns 323435 shares worth $682447
• Bridgeway Capital Management owns 309088 shares worth $509995
• Geode Capital Management owns 283909 shares worth $599047
• TIAA-CREF Investment Management owns 263277 shares worth $555514
• Hudson Bay Capital Management owns 248875 shares worth $410643
• GRT Capital Partners owns 237696 shares worth $501538
• Stafford Asset Management owns 188599 shares worth $509217
• Verition Fund Management owns 183000 shares worth $301950
• Spark LP/DE owns 179200 shares worth $424704
• Jacobs Levy Equity Management owns 172597 shares worth $284785
• Zurcher Kantonalbank owns 172383 shares worth $363728
• Renaissance Technologies owns 155100 shares worth $266772
• North Tide Capital owns 150000 shares worth $316500
• ALLIANCEBERNSTEIN owns 148231 shares worth $312767
• CalPERS owns 138463 shares worth $254771
• Frank Russell Company owns 137914 shares worth $226178
• Spark Investment Management owns 119185 shares worth $195463

• Allianz Global Investors of America sold on Sept. 30, 2011
• Kleinheinz Capital Partners sold on Sept. 30, 2011
• Daniel D. Thurber sold on Sept. 30, 2011
• GOLDMAN SACHS sold on Sept. 30, 2011
• Royal Bank of Scotland sold on Sept. 30, 2011
• GAGNON SECURITIES sold on June 30, 2011
• Technical Financial Services sold on June 30, 2011
• Catapult Capital Management sold on March 31, 2011
• First Trust Advisors sold on March 31, 2011
• Artis Capital Management, L P sold on Dec. 31, 2010
• Diamondback Capital Management sold on June 30, 2010

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