ONeil Mark F
SEC Form 4 insider trading activity
ONeil Mark F has filed 3 SEC Form 4 filings (4 transaction rows) across 1 company, with disclosures dating back to 2025. 2 of those filings fall inside the rolling window. Most recent filing: Jun 29, 2026.
On the most recent filing, ONeil Mark F is listed as Director at CARMAX INC. Inside the rolling window, ONeil Mark F reported 1 open-market purchase totaling $251K in KMX and no open-market sales.
Companies traded
Other insiders at KMX
Insider Buying
$251K
reported purchases (SEC code P)
Insider Selling
$0
reported sales (SEC code S)
Companies
1
in the rolling window
Earlier trades
Open-market purchases and sales filed before the rolling 365-day window, kept from the original Form 4 filings.
| Date | Ticker | Type | Value |
|---|---|---|---|
| Oct 2, 2025 | KMX | Purchase | $500K |
Frequently asked questions
How many SEC Form 4 filings has ONeil Mark F made?
ONeil Mark F has filed 3 SEC Form 4 filings (4 transaction rows) across 1 company since 2025.
Which companies does ONeil Mark F trade?
ONeil Mark F has filed SEC Form 4 disclosures for 1 company, including KMX.
When was ONeil Mark F's most recent SEC Form 4 filing?
ONeil Mark F's most recent SEC Form 4 filing on Tracefour is dated Jun 29, 2026.
What is ONeil Mark F's total buy and sell value in the current window?
Inside the rolling retention window, ONeil Mark F bought $251K and sold $0 based on SEC Form 4 filings.
What was ONeil Mark F's largest disclosed transaction?
The largest disclosed transaction in the current window is a purchase of 4,800 KMX shares on 2026-06-24, worth $251K, per SEC Form 4 filings.