Thurmond Mark C. — SEC Form 4 filings
SEC reporting owner CIK 1651579. 33 Form 4 filings on record with FilingPulse; latest filed 2026-08-25.
Transaction summary — filings shown
Covers all 33 filings on record, filed 2024-02-07 to 2026-08-25. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 37 legs across 27 filings — 148,250 shares, $6,212,837 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 165.
- Largest priced transaction: sale of 26,175 shares @ $51.45 ($1,346,704) in Tenable Holdings, Inc., filed 2024-02-09.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| Tenable Holdings, Inc. (TENB) | Co-Chief Executive Officer, Director | 33 | — | 37 legs · 148,250 sh · $6,212,837 | 165 |
Form 4 filings — Thurmond Mark C.
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-08-25 | 4 | Tenable Holdings, Inc. (TENB) | Option exercise (M): 1,162 @ $0 · Tax withholding (F): 562 @ $33.94 · Option exercise (M): 2,267 @ $0 · Tax withholding (F): 1,097 @ $33.94 · Option exercise (M): 6,095 @ $0 · Tax withholding (F): 2,947 @ $33.94 · +12 more | EDGAR |
| 2026-05-26 | 4 | Tenable Holdings, Inc. (TENB) | Option exercise (M): 1,162 @ $0 · Tax withholding (F): 562 @ $25.45 · Option exercise (M): 2,267 @ $0 · Tax withholding (F): 1,097 @ $25.45 · Option exercise (M): 6,095 @ $0 · Tax withholding (F): 2,947 @ $25.45 · +12 more | EDGAR |
| 2026-02-27 | 4 | Tenable Holdings, Inc. (TENB) | Option exercise (M): 24,381 @ $0 · Tax withholding (F): 11,789 @ $19 · Option exercise (M): 24,381 (derivative) @ $0 · Grant/award (A): 341,847 (derivative) @ $0 | EDGAR |
| 2026-02-25 | 4 | Tenable Holdings, Inc. (TENB) | Option exercise (M): 1,365 @ $0 · Tax withholding (F): 401 @ $17.55 · Option exercise (M): 1,162 @ $0 · Tax withholding (F): 342 @ $17.55 · Option exercise (M): 2,267 @ $0 · Tax withholding (F): 666 @ $17.55 · +15 more | EDGAR |
| 2025-11-25 | 4 | Tenable Holdings, Inc. (TENB) | Option exercise (M): 1,363 @ $0 · Tax withholding (F): 660 @ $25.68 · Option exercise (M): 1,162 @ $0 · Tax withholding (F): 562 @ $25.68 · Option exercise (M): 2,267 @ $0 · Tax withholding (F): 1,097 @ $25.68 · +12 more | EDGAR |
| 2025-08-27 | 4 | Tenable Holdings, Inc. (TENB) | Sale (S): 2,541 @ $29.84 | EDGAR |
| 2025-08-26 | 4 | Tenable Holdings, Inc. (TENB) | Option exercise (M): 1,162 @ $0 · Option exercise (M): 2,267 @ $0 · Option exercise (M): 3,713 @ $0 · Option exercise (M): 46,585 @ $0 · Option exercise (M): 4,368 @ $0 · Sale (S): 28,500 @ $30.25 · +9 more | EDGAR |
| 2025-05-29 | 4 | Tenable Holdings, Inc. (TENB) | Sale (S): 2,483 @ $32.45 | EDGAR |
| 2025-05-27 | 4 | Tenable Holdings, Inc. (TENB) | Option exercise (M): 1,162 @ $0 · Option exercise (M): 2,267 @ $0 · Option exercise (M): 3,713 @ $0 · Option exercise (M): 4,368 @ $0 · Option exercise (M): 1,363 @ $0 · Option exercise (M): 3,857 @ $0 · +7 more | EDGAR |
| 2025-02-28 | 4 | Tenable Holdings, Inc. (TENB) | Sale (S): 4,878 @ $38.19 · Sale (S): 5,984 @ $38.16 | EDGAR |
| 2025-02-26 | 4 | Tenable Holdings, Inc. (TENB) | Option exercise (M): 1,363 @ $0 · Option exercise (M): 1,161 @ $0 · Option exercise (M): 9,069 @ $0 · Option exercise (M): 3,857 @ $0 · Option exercise (M): 3,713 @ $0 · Option exercise (M): 17,472 @ $0 · +8 more | EDGAR |
| 2025-02-20 | 4 | Tenable Holdings, Inc. (TENB) | Option exercise (M): 4,561 @ $0 · Sale (S): 1,341 @ $39.56 · Option exercise (M): 4,561 (derivative) @ $0 | EDGAR |
| 2025-02-18 | 4 | Tenable Holdings, Inc. (TENB) | Grant/award (A): 36,277 (derivative) @ $0 | EDGAR |
| 2024-12-02 | 4 | Tenable Holdings, Inc. (TENB) | Sale (S): 939 @ $42.95 | EDGAR |
| 2024-11-27 | 4 | Tenable Holdings, Inc. (TENB) | Sale (S): 886 @ $42.61 · Sale (S): 2,537 @ $42.56 | EDGAR |
| 2024-11-26 | 4 | Tenable Holdings, Inc. (TENB) | Option exercise (M): 1,161 @ $0 · Option exercise (M): 3,713 @ $0 · Sale (S): 2,343 @ $42.74 · Option exercise (M): 1,363 @ $0 · Option exercise (M): 3,857 @ $0 · Option exercise (M): 1,161 (derivative) @ $0 · +3 more | EDGAR |
| 2024-11-22 | 4 | Tenable Holdings, Inc. (TENB) | Sale (S): 823 @ $40.71 | EDGAR |
| 2024-11-20 | 4 | Tenable Holdings, Inc. (TENB) | Option exercise (M): 4,561 @ $0 · Sale (S): 2,209 @ $40.72 · Option exercise (M): 4,561 (derivative) @ $0 | EDGAR |
| 2024-08-28 | 4 | Tenable Holdings, Inc. (TENB) | Sale (S): 881 @ $41.39 · Sale (S): 2,502 @ $41.75 · Sale (S): 951 @ $41.03 | EDGAR |
| 2024-08-26 | 4 | Tenable Holdings, Inc. (TENB) | Option exercise (M): 1,161 @ $0 · Option exercise (M): 3,713 @ $0 · Sale (S): 2,357 @ $41.54 · Option exercise (M): 1,363 @ $0 · Option exercise (M): 3,857 @ $0 · Option exercise (M): 1,161 (derivative) @ $0 · +3 more | EDGAR |
| 2024-08-22 | 4 | Tenable Holdings, Inc. (TENB) | Sale (S): 818 @ $42.17 | EDGAR |
| 2024-08-21 | 4 | Tenable Holdings, Inc. (TENB) | Option exercise (M): 4,561 @ $0 · Sale (S): 2,224 @ $42.36 · Option exercise (M): 4,561 (derivative) @ $0 | EDGAR |
| 2024-08-01 | 4 | Tenable Holdings, Inc. (TENB) | Sale (S): 4,700 @ $49.01 | EDGAR |
| 2024-05-29 | 4 | Tenable Holdings, Inc. (TENB) | Sale (S): 949 @ $43.97 | EDGAR |
| 2024-05-28 | 4 | Tenable Holdings, Inc. (TENB) | Sale (S): 2,371 @ $43.18 · Option exercise (M): 1,362 @ $0 · Option exercise (M): 3,857 @ $0 · Sale (S): 875 @ $42.94 · Sale (S): 2,506 @ $43.48 · Option exercise (M): 1,362 (derivative) @ $0 · +1 more | EDGAR |
| 2024-05-23 | 4 | Tenable Holdings, Inc. (TENB) | Sale (S): 820 @ $43.55 · Option exercise (M): 1,161 @ $0 · Option exercise (M): 3,712 @ $0 · Option exercise (M): 1,161 (derivative) @ $0 · Option exercise (M): 3,712 (derivative) @ $0 | EDGAR |
| 2024-05-21 | 4 | Tenable Holdings, Inc. (TENB) | Option exercise (M): 4,561 @ $0 · Sale (S): 2,219 @ $43.76 · Option exercise (M): 4,561 (derivative) @ $0 | EDGAR |
| 2024-03-22 | 4 | Tenable Holdings, Inc. (TENB) | Sale (S): 10,824 @ $49 | EDGAR |
| 2024-02-29 | 4 | Tenable Holdings, Inc. (TENB) | Sale (S): 1,095 @ $47.50 · Sale (S): 2,383 @ $47.44 · Sale (S): 3,644 @ $46.81 | EDGAR |
| 2024-02-27 | 4 | Tenable Holdings, Inc. (TENB) | Sale (S): 1,684 @ $47.67 · Option exercise (M): 1,362 @ $0 · Option exercise (M): 3,857 @ $0 · Sale (S): 7,110 @ $47.72 · Option exercise (M): 1,362 (derivative) @ $0 · Option exercise (M): 3,857 (derivative) @ $0 | EDGAR |
| 2024-02-22 | 4 | Tenable Holdings, Inc. (TENB) | Option exercise (M): 4,561 @ $0 · Sale (S): 1,450 @ $46.22 · Option exercise (M): 4,648 @ $0 · Option exercise (M): 14,851 @ $0 · Sale (S): 1,089 @ $47.73 · Option exercise (M): 4,561 (derivative) @ $0 · +4 more | EDGAR |
| 2024-02-09 | 4 | Tenable Holdings, Inc. (TENB) | Sale (S): 26,175 @ $51.45 | EDGAR |
| 2024-02-07 | 4 | Tenable Holdings, Inc. (TENB) | Option exercise (M): 13,103 @ $0 · Sale (S): 3,976 @ $47.34 · Option exercise (M): 13,103 (derivative) @ $0 | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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