Mark Oneil Insider Trades & Stock Holdings

CarMax, Inc. · Latest filing Jun 26, 2026

Mark Oneil at CarMax, Inc. has 2 Form 4 trades on file since Jun 24, 2026. Open-market activity: 1 purchase ($502.66K) and 0 sales ($0), net +$502.66K. Latest filing: acquired 3.70K shares of $KMX on Jun 26, 2026.

Trades on file: 2
Open-market bought: $502.66K
Open-market sold: $0
Net open-market: +$502.66K
Latest filing: Jun 26, 2026

All insider trades by Mark Oneil

Date	Ticker	Type	Shares	Price	Value	Owned after	ΔOwn	1W	1M	6M	Role	Filing	Story
Jun 26, 2026	$KMX	Buy (Grant or award)	3.70K	$0	—			-4.8%	+10.7%				—
Jun 24, 2026	$KMX	Buy (Open-market buy)	9.60K	$52.36	$502.66K			+2.0%	+14.8%				Read

"Buy" means shares acquired on the Form 4 (including grants and option exercises); "Sell" means shares disposed. 1W / 1M / 6M = how the stock moved after the trade.

Stocks Mark Oneil traded

$KMX

Frequently asked questions

Has Mark Oneil been buying or selling stock?

Mark Oneil has 1 open-market purchase and 0 open-market sales on file, net +$502.66K. Grants, option exercises and tax withholding are listed separately because they are not open-market trades.

What was Mark Oneil's latest insider trade?

acquired 3.70K shares of $KMX on Jun 26, 2026.

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Data comes from public SEC Form 4 and 13F filings and STOCK Act disclosures. Dates are the trade or filing date reported. This page is for research only and is not investment advice.

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