Mark D Walker
CIK 1896664 · Chairman and CEO · last filed 2026-06-29
"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 · Page 5 of 5
47 filingsInsider 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 |
|---|---|---|---|---|---|
| 2023-08-23 | Direct Digital Holdings, Inc. (DRCTW) Delisted | Mixed | +15,356 | -$16.1K | EDGAR |
| 2023-06-13 | Direct Digital Holdings, Inc. (DRCTW) Delisted | Exer (M) | +20,097 | $0 | EDGAR |
| 2023-03-22 | Direct Digital Holdings, Inc. (DRCTW) Delisted | Grant (A) | — | $0 | EDGAR |
| 2022-12-01 | Direct Digital Holdings, Inc. (DRCTW) Delisted | Buy (P) | — | $0 | EDGAR |
| 2022-11-29 | Direct Digital Holdings, Inc. (DRCTW) Delisted | Buy (P) | — | $0 | EDGAR |
| 2022-11-25 | Direct Digital Holdings, Inc. (DRCTW) Delisted | Buy (P) | — | $0 | EDGAR |
| 2022-06-13 | Direct Digital Holdings, Inc. (DRCTW) Delisted | Grant (A) | — | $0 | EDGAR |
Showing 41–47 of 47
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Page 5 of 5
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.
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.