ONeil Mark F

Director at Dealertrack Technologies, Inc · on record since Feb 22, 2006
Director at CARMAX INC · on record since Apr 14, 2026
Chairman of Board, Pres. & CEO at Dealertrack Technologies, Inc · on record since Dec 12, 2005

Insider trading activity of ONeil Mark F

Transactions on record: 496; since Dec 20, 2005

Open-market buys: 5; $1.3M

Open-market sells: 337; $39.3M

Companies traded: 2; last filing Jun 29, 2026

Figures computed from official regulatory filings — .

Companies where ONeil Mark F has traded

CARMAX INC15 tx · $1.3M · Jun 29, 2026
Dealertrack Technologies, Inc481 tx · $53.8M · Jun 22, 2015

Track record of ONeil Mark F

Statistical track record

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Open-market buys: 5

Last buy: Jun 24, 2026

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Transaction history of ONeil Mark F

Co-insiders of ONeil Mark F

ACF INVESTMENT CORPDealertrack Technologies, Inc
ALLEN ROBERT WDealertrack Technologies, Inc
Barr KeithCARMAX INC

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
CARMAX INCListing on record	Jun 29, 2026	Award	3,696	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CARMAX INCListing on record	Jun 26, 2026	Buy	4,800	52.36 USD	$251.3K	conv 47Cluster	SEC
CARMAX INCListing on record	Jun 26, 2026	Buy	4,800	52.36 USD	$251.3K	conv 43Cluster	SEC
CARMAX INCListing on record	Apr 14, 2026	Buy	191	93.17 USD	$17.8K	conv 28	SEC
CARMAX INCListing on record	Oct 6, 2025	Buy	10,816	46.21 USD	$499.8K	conv 79First in 12mo	SEC
CARMAX INCListing on record	Jul 2, 2025	Award	2,753	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CARMAX INCListing on record	Jul 2, 2024	Award	2,598	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CARMAX INCListing on record	Jul 5, 2023	Award	2,210	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CARMAX INCListing on record	Jul 5, 2022	Award	1,996	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CARMAX INCListing on record	Jul 7, 2021	Award	1,308	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CARMAX INCListing on record	Apr 13, 2021	Gift	-2,700	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CARMAX INCListing on record	Oct 2, 2020	Buy	2,700	93.40 USD	$252.2K	conv 61First in 12mo	SEC
CARMAX INCListing on record	Jun 30, 2020	Award	2,021	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CARMAX INCListing on record	Mar 20, 2020	Gift	-6,515	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CARMAX INCListing on record	Dec 27, 2019	Award	988	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Dealertrack Technologies, IncListing unverified	Jun 22, 2015	Sell	-50,000	62.95 USD	$3.1M	Unusual size	SEC
Dealertrack Technologies, IncListing unverified	Jun 1, 2015	Other	-62,888	41.80 USD	$2.6M	Unusual size	SEC
Dealertrack Technologies, IncListing unverified	Jun 1, 2015	ExerciseD (derivative)	-105,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Dealertrack Technologies, IncListing unverified	Jun 1, 2015	Exercise	105,000	41.80 USD	$4.4M	Unusual size	SEC
Dealertrack Technologies, IncListing unverified	Apr 21, 2015	ExerciseD (derivative)	-20,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Dealertrack Technologies, IncListing unverified	Apr 21, 2015	Exercise	20,000	37.67 USD	$753.4K	Unusual size	SEC
Dealertrack Technologies, IncListing unverified	Feb 27, 2015	Award	21,599	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Dealertrack Technologies, IncListing unverified	Feb 27, 2015	AwardD (derivative)	23,599	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Dealertrack Technologies, IncListing unverified	Feb 27, 2015	AwardD (derivative)	60,466	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Dealertrack Technologies, IncListing unverified	Feb 26, 2015	Award	7,351	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
CARMAX INCListing on record	Jun 29, 2026	Award	3,696	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CARMAX INCListing on record	Jun 26, 2026	Buy	4,800	52.36 USD	$251.3K	conv 47Cluster	SEC
CARMAX INCListing on record	Jun 26, 2026	Buy	4,800	52.36 USD	$251.3K	conv 43Cluster	SEC
CARMAX INCListing on record	Apr 14, 2026	Buy	191	93.17 USD	$17.8K	conv 28	SEC
CARMAX INCListing on record	Oct 6, 2025	Buy	10,816	46.21 USD	$499.8K	conv 79First in 12mo	SEC
CARMAX INCListing on record	Jul 2, 2025	Award	2,753	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CARMAX INCListing on record	Jul 2, 2024	Award	2,598	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CARMAX INCListing on record	Jul 5, 2023	Award	2,210	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CARMAX INCListing on record	Jul 5, 2022	Award	1,996	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CARMAX INCListing on record	Jul 7, 2021	Award	1,308	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CARMAX INCListing on record	Apr 13, 2021	Gift	-2,700	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CARMAX INCListing on record	Oct 2, 2020	Buy	2,700	93.40 USD	$252.2K	conv 61First in 12mo	SEC
CARMAX INCListing on record	Jun 30, 2020	Award	2,021	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CARMAX INCListing on record	Mar 20, 2020	Gift	-6,515	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CARMAX INCListing on record	Dec 27, 2019	Award	988	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Dealertrack Technologies, IncListing unverified	Jun 22, 2015	Sell	-50,000	62.95 USD	$3.1M	Unusual size	SEC
Dealertrack Technologies, IncListing unverified	Jun 1, 2015	Other	-62,888	41.80 USD	$2.6M	Unusual size	SEC
Dealertrack Technologies, IncListing unverified	Jun 1, 2015	ExerciseD (derivative)	-105,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Dealertrack Technologies, IncListing unverified	Jun 1, 2015	Exercise	105,000	41.80 USD	$4.4M	Unusual size	SEC
Dealertrack Technologies, IncListing unverified	Apr 21, 2015	ExerciseD (derivative)	-20,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Dealertrack Technologies, IncListing unverified	Apr 21, 2015	Exercise	20,000	37.67 USD	$753.4K	Unusual size	SEC
Dealertrack Technologies, IncListing unverified	Feb 27, 2015	Award	21,599	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Dealertrack Technologies, IncListing unverified	Feb 27, 2015	AwardD (derivative)	23,599	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Dealertrack Technologies, IncListing unverified	Feb 27, 2015	AwardD (derivative)	60,466	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Dealertrack Technologies, IncListing unverified	Feb 26, 2015	Award	7,351	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC