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Mark F ONeil

CIK 1342016 · Chairman and CEO · last filed 2026-06-29

Mark F ONeil is a Chairman and CEO who has filed 94 SEC Form 4 insider transactions across 1 company since 2019. The most recent filing, for KMX, was dated Jun 29, 2026. Across all open-market trades the lifetime net is +$1.3M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $3.0M across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$3.04M

Companies

1

Total Filings

94

Lifetime Open-Market Net

$1.25M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
KMX Director 49,870 $60.99 $3.04M $1.25M 11 2026-06-29

Recent Filings

94 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-06-29 KMX Grant (A) +3,696 $0 EDGAR
2026-06-26 KMX Buy (P) +9,600 $502.7K EDGAR
2025-10-06 KMX Buy (P) +10,816 $499.8K EDGAR
2025-07-02 KMX Grant (A) +2,753 $0 EDGAR
2024-07-02 KMX Grant (A) +2,598 $0 EDGAR
2023-07-05 KMX Grant (A) +2,210 $0 EDGAR
2022-07-05 KMX Grant (A) +1,996 $0 EDGAR
2021-07-07 KMX Grant (A) +1,308 $0 EDGAR
2020-10-02 KMX Buy (P) +2,700 $252.2K EDGAR
2020-06-30 KMX Grant (A) +2,021 $0 EDGAR
Showing 1–10 of 94
Page 1 of 10
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.