Mark D Walker

CIK 1896664 · Chairman and CEO · last filed 2026-06-29

Mark D Walker is a Chairman and CEO who has filed 47 SEC Form 4 insider transactions across 2 companies since 2022. The most recent filing, for DRCT, was dated Jun 29, 2026. Across all open-market trades the lifetime net is −$431.9K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $570 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

$570

Companies

2

Total Filings

47

Lifetime Open-Market Net

-$431.9K

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
DRCT Chairman and CEO 221 $2.58 $570 -$431.9K 33 2026-06-29
Direct Digital Holdings, Inc. (DRCTW) Delisted Chairman and CEO 15,356 $0.45 $7.0K $0 7 2023-08-23

Recent Filings

47 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 DRCT Mixed −1,142 -$4.9K EDGAR
2025-12-23 DRCT Conv (C) +300,000 $0 EDGAR
2025-12-11 DRCT Notice (144) −300,000 -$26.4K EDGAR
2025-11-17 DRCT Sell (S) −272,500 -$61.6K EDGAR
2025-11-12 DRCT Notice (144) −272,500 -$54.4K EDGAR
2025-10-02 DRCT Conv (C) +272,500 $0 EDGAR
2025-08-19 DRCT Sell (S) −69,682 -$27.6K EDGAR
2025-07-23 DRCT Sell (S) −37,772 -$19.4K EDGAR
2025-07-18 DRCT Sell (S) −50,695 -$26.3K EDGAR
2025-07-16 DRCT Sell (S) −29,220 -$16.0K EDGAR
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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.