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

• ALLIANCEBERNSTEIN owns 2.69M shares worth $79.13M
• Vanguard owns 2.57M shares worth $75.38M
• Daniel D. Thurber owns 2.24M shares worth $65.93M
• DARUMA ASSET MANAGEMENT INC /NY owns 2.14M shares worth $62.96M
• Wells Fargo & Company owns 1.99M shares worth $59.84M
• DF DENT & CO owns 1.86M shares worth $55.96M
• TimesSquare Capital Management owns 1.69M shares worth $49.64M
• FRED ALGER MANAGEMENT owns 1.52M shares worth $44.61M
• Inves owns 1.20M shares worth $35.31M
• JPMORGAN CHASE & CO owns 1.18M shares worth $35.51M
• Wellington Management Company owns 1.10M shares worth $32.30M
• Waddell & Reed Financial owns 1.08M shares worth $30.09M
• KALMAR INVESTMENTS INC /DE/ owns 925255 shares worth $27.18M
• Ameriprise Financial owns 898459 shares worth $27.05M
• Loomis, Sayles and owns 898312 shares worth $25.02M
• STATE STREET CORPORATION owns 853518 shares worth $25.08M
• Century Capital Management owns 802895 shares worth $23.59M
• Damian Sousa owns 644692 shares worth $17.57M
• Eagle Boston Investment Management owns 613385 shares worth $18.02B
• Chartwell Investment Partners owns 552095 shares worth $15.86M
• Frank Russell Company owns 485753 shares worth $14.09M
• Heather K. Mellem, Esq. owns 478713 shares worth $13.75M
• Turner Investments owns 464555 shares worth $14.06M
• First Trust Advisors owns 459043 shares worth $13.49M
• Summit Creek Advisors owns 418249 shares worth $12.29M
• Perimeter Capital Partners owns 398339 shares worth $12.06M
• GRANAHAN INVESTMENT MANAGEMENT INC/MA owns 350000 shares worth $10.54M
• ING Investment Management Co Address: 10 State House Square owns 341950 shares worth $9.90M
• Frontier Capital Management owns 340048 shares worth $10.29M
• Porter Orlin owns 315724 shares worth $8.61M

• BURGUNDY ASSET MANAGEMENT sold on Sept. 30, 2011
• Chinook Capital Management sold on June 30, 2011
• FMR sold on Dec. 31, 2010
• CITADEL ADVISORS sold on Dec. 31, 2010
• Goodnow Investment sold on Dec. 31, 2010
• Roxbury Capital Management sold on Sept. 30, 2010

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