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Stock Trading History of Dealertrack Holdings, Inc.

The following table details the trading activities (stock purchases, stock sales, and stock option exercises) reported to the Securities and Exchange Commission (SEC) by insider Dealertrack Holdings, Inc. since year 2005. The trader's CIK number is 1333513. At the time of this reporting, Dealertrack Holdings, Inc. is the 10% Owner of Dealertrack Holdings, Inc. (stock ticker symbol TRAK).

Stock purchases, sales, and option exercises reported by *Dealertrack Holdings, Inc.* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2007-10-18	TRAK	Dealertrack Holdings, Inc.	Sale	2,875,000	46.40	133,400,000

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Dealertrack Holdings, Inc. (10% Owner of Dealertrack Holdings, Inc. at the time of this reporting) see the Securities and Exchange Commission (SEC) website.