Mark C. Thurmond
CIK: 0001651579
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
Tenable Holdings, Inc.
Discretionary Trading P&L
Holdings
Transaction History (94 total)
- Aug 24, 2026TENB
Tenable Holdings, Inc.
Tax Payment(F)Direct3.8K shares at avg. $33.94$127K - Aug 24, 2026TENB
Tenable Holdings, Inc.
Tax Payment(F)Direct1.8K shares at avg. $33.94$61K - Aug 24, 2026TENB
Tenable Holdings, Inc.
Tax Payment(F)Direct2.9K shares at avg. $33.94$100K - Aug 24, 2026TENB
Tenable Holdings, Inc.
Tax Payment(F)Direct1.1K shares at avg. $33.94$37K - Aug 24, 2026TENB
Tenable Holdings, Inc.
Exercise(M)Direct1.2K shares- - Aug 24, 2026TENB
Tenable Holdings, Inc.
Tax Payment(F)Direct562 shares at avg. $33.94$19K - Aug 24, 2026TENB
Tenable Holdings, Inc.
Exercise(M)Direct7.8K shares- - Aug 24, 2026TENB
Tenable Holdings, Inc.
Exercise(M)Direct6.1K shares- - Aug 24, 2026TENB
Tenable Holdings, Inc.
Exercise(M)Direct3.7K shares- - Aug 24, 2026TENB
Tenable Holdings, Inc.
Exercise(M)Direct2.3K shares- - Aug 24, 2026TENB
Tenable Holdings, Inc.
Exercise(M)Direct4.4K shares- - Aug 24, 2026TENB
Tenable Holdings, Inc.
Tax Payment(F)Direct2.1K shares at avg. $33.94$72K - May 22, 2026TENB
Tenable Holdings, Inc.
Exercise(M)Direct7.8K shares- - May 22, 2026TENB
Tenable Holdings, Inc.
Tax Payment(F)Direct1.8K shares at avg. $25.45$46K - May 22, 2026TENB
Tenable Holdings, Inc.
Exercise(M)Direct1.2K shares- - May 22, 2026TENB
Tenable Holdings, Inc.
Exercise(M)Direct3.7K shares- - May 22, 2026TENB
Tenable Holdings, Inc.
Tax Payment(F)Direct2.9K shares at avg. $25.45$75K - May 22, 2026TENB
Tenable Holdings, Inc.
Exercise(M)Direct6.1K shares- - May 22, 2026TENB
Tenable Holdings, Inc.
Tax Payment(F)Direct1.1K shares at avg. $25.45$28K - May 22, 2026TENB
Tenable Holdings, Inc.
Exercise(M)Direct2.3K shares- - May 22, 2026TENB
Tenable Holdings, Inc.
Tax Payment(F)Direct2.1K shares at avg. $25.45$54K - May 22, 2026TENB
Tenable Holdings, Inc.
Exercise(M)Direct4.4K shares- - May 22, 2026TENB
Tenable Holdings, Inc.
Tax Payment(F)Direct3.8K shares at avg. $25.45$96K - May 22, 2026TENB
Tenable Holdings, Inc.
Tax Payment(F)Direct562 shares at avg. $25.45$14K - Feb 26, 2026TENB
Tenable Holdings, Inc.
Award(A)DirectRestricted Stock Units
341.8K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Aug 24, 2026 | TENB Tenable Holdings, Inc. | Tax Payment(F) | 3,754 | $33.94 | $127,411 | Direct |
| Aug 24, 2026 | TENB Tenable Holdings, Inc. | Tax Payment(F) | 1,796 | $33.94 | $60,956 | Direct |
| Aug 24, 2026 | TENB Tenable Holdings, Inc. | Tax Payment(F) | 2,947 | $33.94 | $100,021 | Direct |
| Aug 24, 2026 | TENB Tenable Holdings, Inc. | Tax Payment(F) | 1,097 | $33.94 | $37,232 | Direct |
| Aug 24, 2026 | TENB Tenable Holdings, Inc. | Exercise(M) | 1,162 | - | $0 | Direct |
| Aug 24, 2026 | TENB Tenable Holdings, Inc. | Tax Payment(F) | 562 | $33.94 | $19,074 | Direct |
| Aug 24, 2026 | TENB Tenable Holdings, Inc. | Exercise(M) | 7,764 | - | $0 | Direct |
| Aug 24, 2026 | TENB Tenable Holdings, Inc. | Exercise(M) | 6,095 | - | $0 | Direct |
| Aug 24, 2026 | TENB Tenable Holdings, Inc. | Exercise(M) | 3,713 | - | $0 | Direct |
| Aug 24, 2026 | TENB Tenable Holdings, Inc. | Exercise(M) | 2,267 | - | $0 | Direct |
| Aug 24, 2026 | TENB Tenable Holdings, Inc. | Exercise(M) | 4,368 | - | $0 | Direct |
| Aug 24, 2026 | TENB Tenable Holdings, Inc. | Tax Payment(F) | 2,112 | $33.94 | $71,681 | Direct |
| May 22, 2026 | TENB Tenable Holdings, Inc. | Exercise(M) | 7,764 | - | $0 | Direct |
| May 22, 2026 | TENB Tenable Holdings, Inc. | Tax Payment(F) | 1,796 | $25.45 | $45,708 | Direct |
| May 22, 2026 | TENB Tenable Holdings, Inc. | Exercise(M) | 1,162 | - | $0 | Direct |
| May 22, 2026 | TENB Tenable Holdings, Inc. | Exercise(M) | 3,713 | - | $0 | Direct |
| May 22, 2026 | TENB Tenable Holdings, Inc. | Tax Payment(F) | 2,947 | $25.45 | $75,001 | Direct |
| May 22, 2026 | TENB Tenable Holdings, Inc. | Exercise(M) | 6,095 | - | $0 | Direct |
| May 22, 2026 | TENB Tenable Holdings, Inc. | Tax Payment(F) | 1,097 | $25.45 | $27,919 | Direct |
| May 22, 2026 | TENB Tenable Holdings, Inc. | Exercise(M) | 2,267 | - | $0 | Direct |
| May 22, 2026 | TENB Tenable Holdings, Inc. | Tax Payment(F) | 2,112 | $25.45 | $53,750 | Direct |
| May 22, 2026 | TENB Tenable Holdings, Inc. | Exercise(M) | 4,368 | - | $0 | Direct |
| May 22, 2026 | TENB Tenable Holdings, Inc. | Tax Payment(F) | 3,754 | $25.45 | $95,539 | Direct |
| May 22, 2026 | TENB Tenable Holdings, Inc. | Tax Payment(F) | 562 | $25.45 | $14,303 | Direct |
| Feb 26, 2026 | TENB Tenable Holdings, Inc. | Award(A) Restricted Stock Units | 341,847 | - | - | Direct |
1-25 of 94 transactions
About Thurmond Mark C.
Thurmond Mark C. (SEC CIK 0001651579) files insider reports with the SEC as Co-Chief Executive Officer of Tenable Holdings, Inc. (TENB).
Signal8 holds 18 ownership filings by Thurmond Mark C., all Form 4s, filed between Nov 20, 2024 and Aug 25, 2026. Those filings report 94 transactions, from Nov 18, 2024 to Aug 24, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on Thurmond Mark C.'s filings is in COLUMBIA, MD.
Recent filings by Thurmond Mark C.
- Aug 24, 2026: Tax withholdings of TENB shares (4 lines, Form 4, code F).
- Aug 24, 2026: Option exercise of TENB shares (Form 4, code M).
- Aug 24, 2026: Tax withholding of TENB shares (Form 4, code F).
- Aug 24, 2026: Option exercises of TENB shares (5 lines, Form 4, code M).
- Aug 24, 2026: Tax withholding of TENB shares (Form 4, code F).
Other insiders filing for Tenable Holdings, Inc. (TENB)
- Bell Charles H, Director
- Brown Matthew Charles, Chief Financial Officer
- Anschutz Barron, Officer
- Vintz Stephen A, Co-Chief Executive Officer
- Zecher Linda Kay, Director
- Vicks Raymond Jr., Director