Stock Trading History of Oneil Mark F

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 Oneil Mark F since year 2005. The trader's CIK number is 1342016. At the time of this reporting, Oneil Mark F is the Chairman of Board, Pres. & CEO of Dealertrack Holdings, Inc. (stock ticker symbol TRAK).

Stock purchases, sales, and option exercises reported by *Oneil Mark F* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2007-07-11	TRAK	Dealertrack Holdings, Inc.	Option Exercise	20,000	3.12	62,400
2007-07-10	TRAK	Dealertrack Holdings, Inc.	Sale	10,511	38.53	405,011
2007-07-10	TRAK	Dealertrack Holdings, Inc.	Option Exercise	40,000	3.12	124,800
2007-07-10	TRAK	Dealertrack Holdings, Inc.	Sale	4,251	39.55	168,138
2007-07-10	TRAK	Dealertrack Holdings, Inc.	Sale	8,834	39.35	347,634
2007-07-10	TRAK	Dealertrack Holdings, Inc.	Sale	16,404	39.05	640,596
2007-07-11	TRAK	Dealertrack Holdings, Inc.	Sale	3,400	39.07	132,827
2007-07-11	TRAK	Dealertrack Holdings, Inc.	Sale	7,100	38.77	275,264
2007-07-11	TRAK	Dealertrack Holdings, Inc.	Sale	9,500	38.26	363,470
2007-05-15	TRAK	Dealertrack Holdings, Inc.	Sale	7,700	32.56	250,681
2007-05-15	TRAK	Dealertrack Holdings, Inc.	Sale	2,300	32.78	75,383
2007-03-15	TRAK	Dealertrack Holdings, Inc.	Sale	8,800	29.41	258,842
2007-03-15	TRAK	Dealertrack Holdings, Inc.	Sale	1,200	29.64	35,565
2007-01-16	TRAK	Dealertrack Holdings, Inc.	Sale	10,000	27.16	271,615
2006-11-06	TRAK	Dealertrack Holdings, Inc.	Sale	12,500	26.80	335,035
2006-10-03	TRAK	Dealertrack Holdings, Inc.	Sale	12,500	21.41	267,625
2006-09-05	TRAK	Dealertrack Holdings, Inc.	Sale	12,500	22.15	276,834
2006-08-01	TRAK	Dealertrack Holdings, Inc.	Sale	500	19.21	9,605
2006-08-01	TRAK	Dealertrack Holdings, Inc.	Sale	12,000	18.72	224,661
2006-07-03	TRAK	Dealertrack Holdings, Inc.	Sale	12,500	21.79	272,392

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 Oneil Mark F (Chairman of Board, Pres. & CEO of Dealertrack Holdings, Inc. at the time of this reporting) see the Securities and Exchange Commission (SEC) website.