ONeil Mark F Insider Trading Activity (KMX)

Summary

Updated Jul 16, 2026

ONeil Mark F has filed 2 SEC Form 4 filings across 1 company in the last 90 days — buying. Lifetime open-market purchases: $1.00M.

Role	Director
Notability	20/100

Recent Transactions

Date	Ticker	Company	Code	Shares	Price	Value
2026-06-29	KMX	CARMAX INC	A — Grant or award	3.7K	$0.00
2026-06-26	KMX	CARMAX INC	P — Open-market purchase	4.8K	$52.36	$251K
2026-06-26	KMX	CARMAX INC	P — Open-market purchase	4.8K	$52.36	$251K
2025-10-02	KMX	CARMAX INC	P — Open-market purchase	10.8K	$46.21	$500K
2025-06-30	KMX	CARMAX INC	A — Grant or award	2.8K	$0.00

Frequently Asked Questions

Who is ONeil Mark F?

ONeil Mark F is a corporate insider — currently tracked as Director of CARMAX INC (KMX). InsiderAlpha tracks every SEC Form 4 filing in real time.

How many SEC Form 4 filings has ONeil Mark F submitted recently?

2 primary Form 4 filings in the last 90 days, covering 1 company.

Has ONeil Mark F been buying or selling stock?

Recorded transactions: 3 open-market purchases ($1.00M) and 0 open-market sales () across all tracked filings.

Where can I see all of ONeil Mark F's SEC filings?

All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.

ONeil Mark F — SEC Form 4 Insider Trading Activity

Summary

Profile

Board memberships