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. 3 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 2 open-market purchases totaling $751K in KMX and no open-market sales. The largest disclosed transaction in the window is a purchase of 10,816 KMX shares on Oct 2, 2025, worth $500K.
Companies traded
Other insiders at KMX
Insider Buying
$751K
reported purchases (SEC code P)
Insider Selling
$0
reported sales (SEC code S)
Companies
1
in the rolling window
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 $751K 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 10,816 KMX shares on 2025-10-02, worth $500K, per SEC Form 4 filings.