Thurmond Mark C.
Known title: Chief Operating OfficerCIK: 0001651579
Associated companies
Transaction History
| TENB | ▲ Buy | Option Exercise | 1,162 | $0 | 8/24/2026 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 562 | $19K | 8/24/2026 | View on chart |
| TENB | ▲ Buy | Option Exercise | 2,267 | $0 | 8/24/2026 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 1,097 | $37K | 8/24/2026 | View on chart |
| TENB | ▲ Buy | Option Exercise | 6,095 | $0 | 8/24/2026 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 2,947 | $100K | 8/24/2026 | View on chart |
| TENB | ▲ Buy | Option Exercise | 3,713 | $0 | 8/24/2026 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 1,796 | $61K | 8/24/2026 | View on chart |
| TENB | ▲ Buy | Option Exercise | 7,764 | $0 | 8/24/2026 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 3,754 | $127K | 8/24/2026 | View on chart |
| TENB | ▲ Buy | Option Exercise | 4,368 | $0 | 8/24/2026 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 2,112 | $72K | 8/24/2026 | View on chart |
| TENB | ▲ Buy | Option Exercise | 1,162 | $0 | 5/22/2026 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 562 | $14K | 5/22/2026 | View on chart |
| TENB | ▲ Buy | Option Exercise | 2,267 | $0 | 5/22/2026 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 1,097 | $28K | 5/22/2026 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 2,947 | $75K | 5/22/2026 | View on chart |
| TENB | ▲ Buy | Option Exercise | 3,713 | $0 | 5/22/2026 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 3,754 | $96K | 5/22/2026 | View on chart |
| TENB | ▲ Buy | Option Exercise | 4,368 | $0 | 5/22/2026 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 2,112 | $54K | 5/22/2026 | View on chart |
| TENB | ▲ Buy | Option Exercise | 6,095 | $0 | 5/22/2026 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 1,796 | $46K | 5/22/2026 | View on chart |
| TENB | ▲ Buy | Option Exercise | 7,764 | $0 | 5/22/2026 | View on chart |
| TENB | ▲ Buy | Option Exercise | 24,381 | $0 | 2/25/2026 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 11,789 | $224K | 2/25/2026 | View on chart |
| TENB | ▲ Buy | Option Exercise | 1,365 | $0 | 2/23/2026 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 401 | $7K | 2/23/2026 | View on chart |
| TENB | ▲ Buy | Option Exercise | 1,162 | $0 | 2/23/2026 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 342 | $6K | 2/23/2026 | View on chart |
| TENB | ▲ Buy | Option Exercise | 2,267 | $0 | 2/23/2026 | View on chart |
| TENB | ▲ Buy | Option Exercise | 3,857 | $0 | 2/23/2026 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 1,865 | $33K | 2/23/2026 | View on chart |
| TENB | ▲ Buy | Option Exercise | 3,713 | $0 | 2/23/2026 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 1,090 | $19K | 2/23/2026 | View on chart |
| TENB | ▲ Buy | Option Exercise | 46,586 | $0 | 2/23/2026 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 15,635 | $274K | 2/23/2026 | View on chart |
| TENB | ▲ Buy | Option Exercise | 4,368 | $0 | 2/23/2026 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 666 | $12K | 2/23/2026 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 1,283 | $23K | 2/23/2026 | View on chart |
| TENB | ▲ Buy | Option Exercise | 1,363 | $0 | 11/24/2025 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 660 | $17K | 11/24/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 1,162 | $0 | 11/24/2025 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 562 | $14K | 11/24/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 3,857 | $0 | 11/24/2025 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 1,865 | $48K | 11/24/2025 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 1,796 | $46K | 11/24/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 2,267 | $0 | 11/24/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 3,713 | $0 | 11/24/2025 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 1,097 | $28K | 11/24/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 4,368 | $0 | 11/24/2025 | View on chart |
| TENB | ▼ Sell | Tax Withholding | 2,112 | $54K | 11/24/2025 | View on chart |
| TENB | ▼ Sell | Open Market | 2,541 | $76K | 8/26/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 1,363 | $0 | 8/25/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 3,857 | $0 | 8/25/2025 | View on chart |
| TENB | ▼ Sell | Open Market | 28,500 | $862K | 8/25/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 1,162 | $0 | 8/22/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 2,267 | $0 | 8/22/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 3,713 | $0 | 8/22/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 46,585 | $0 | 8/22/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 4,368 | $0 | 8/22/2025 | View on chart |
| TENB | ▼ Sell | Open Market | 2,483 | $81K | 5/27/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 1,363 | $0 | 5/23/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 3,857 | $0 | 5/23/2025 | View on chart |
| TENB | ▼ Sell | Open Market | 5,577 | $178K | 5/23/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 1,162 | $0 | 5/22/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 2,267 | $0 | 5/22/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 3,713 | $0 | 5/22/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 4,368 | $0 | 5/22/2025 | View on chart |
| TENB | ▼ Sell | Open Market | 5,984 | $228K | 2/27/2025 | View on chart |
| TENB | ▼ Sell | Open Market | 4,878 | $186K | 2/26/2025 | View on chart |
| TENB | ▼ Sell | Open Market | 3,606 | $139K | 2/25/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 1,363 | $0 | 2/24/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 9,069 | $0 | 2/24/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 1,161 | $0 | 2/24/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 3,857 | $0 | 2/24/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 3,713 | $0 | 2/24/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 17,472 | $0 | 2/24/2025 | View on chart |
| TENB | ▼ Sell | Open Market | 1,341 | $53K | 2/19/2025 | View on chart |
| TENB | ▲ Buy | Option Exercise | 4,561 | $0 | 2/18/2025 | View on chart |
| TENB | ▼ Sell | Open Market | 939 | $40K | 11/27/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 886 | $38K | 11/26/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 2,537 | $108K | 11/26/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 2,343 | $100K | 11/25/2024 | View on chart |
| TENB | ▲ Buy | Option Exercise | 1,363 | $0 | 11/25/2024 | View on chart |
| TENB | ▲ Buy | Option Exercise | 3,857 | $0 | 11/25/2024 | View on chart |
| TENB | ▲ Buy | Option Exercise | 1,161 | $0 | 11/22/2024 | View on chart |
| TENB | ▲ Buy | Option Exercise | 3,713 | $0 | 11/22/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 823 | $34K | 11/20/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 2,209 | $90K | 11/19/2024 | View on chart |
| TENB | ▲ Buy | Option Exercise | 4,561 | $0 | 11/18/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 951 | $39K | 8/27/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 881 | $36K | 8/26/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 2,502 | $104K | 8/26/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 2,357 | $98K | 8/23/2024 | View on chart |
| TENB | ▲ Buy | Option Exercise | 1,363 | $0 | 8/23/2024 | View on chart |
| TENB | ▲ Buy | Option Exercise | 3,857 | $0 | 8/23/2024 | View on chart |
| TENB | ▲ Buy | Option Exercise | 1,161 | $0 | 8/22/2024 | View on chart |
| TENB | ▲ Buy | Option Exercise | 3,713 | $0 | 8/22/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 818 | $34K | 8/21/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 2,224 | $94K | 8/20/2024 | View on chart |
| TENB | ▲ Buy | Option Exercise | 4,561 | $0 | 8/19/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 4,700 | $230K | 7/30/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 949 | $42K | 5/28/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 875 | $38K | 5/24/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 2,506 | $109K | 5/24/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 2,371 | $102K | 5/23/2024 | View on chart |
| TENB | ▲ Buy | Option Exercise | 1,362 | $0 | 5/23/2024 | View on chart |
| TENB | ▲ Buy | Option Exercise | 3,857 | $0 | 5/23/2024 | View on chart |
| TENB | ▲ Buy | Option Exercise | 1,161 | $0 | 5/22/2024 | View on chart |
| TENB | ▲ Buy | Option Exercise | 3,712 | $0 | 5/22/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 820 | $36K | 5/21/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 2,219 | $97K | 5/20/2024 | View on chart |
| TENB | ▲ Buy | Option Exercise | 4,561 | $0 | 5/17/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 10,824 | $530K | 3/20/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 3,644 | $171K | 2/28/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 1,095 | $52K | 2/27/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 2,383 | $113K | 2/27/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 7,110 | $339K | 2/26/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 1,684 | $80K | 2/23/2024 | View on chart |
| TENB | ▲ Buy | Option Exercise | 1,362 | $0 | 2/23/2024 | View on chart |
| TENB | ▲ Buy | Option Exercise | 3,857 | $0 | 2/23/2024 | View on chart |
| TENB | ▲ Buy | Option Exercise | 4,648 | $0 | 2/22/2024 | View on chart |
| TENB | ▲ Buy | Option Exercise | 14,851 | $0 | 2/22/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 1,089 | $52K | 2/22/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 1,450 | $67K | 2/21/2024 | View on chart |
| TENB | ▲ Buy | Option Exercise | 4,561 | $0 | 2/20/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 26,175 | $1.3M | 2/7/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 3,976 | $188K | 2/6/2024 | View on chart |
| TENB | ▲ Buy | Option Exercise | 13,103 | $0 | 2/5/2024 | View on chart |
| TENB | ▼ Sell | Open Market | 951 | $40K | 11/28/2023 | View on chart |
| TENB | ▼ Sell | Open Market | 2,501 | $100K | 11/27/2023 | View on chart |
| TENB | ▲ Buy | Option Exercise | 1,362 | $0 | 11/24/2023 | View on chart |
| TENB | ▲ Buy | Option Exercise | 3,856 | $0 | 11/24/2023 | View on chart |
| TENB | ▼ Sell | Open Market | 827 | $33K | 11/22/2023 | View on chart |
| TENB | ▼ Sell | Open Market | 2,197 | $87K | 11/20/2023 | View on chart |
| TENB | ▼ Sell | Open Market | 2,357 | $94K | 11/17/2023 | View on chart |
| TENB | ▲ Buy | Option Exercise | 4,561 | $0 | 11/17/2023 | View on chart |
| TENB | ▼ Sell | Open Market | 6,368 | $235K | 11/6/2023 | View on chart |
| TENB | ▲ Buy | Option Exercise | 13,103 | $0 | 11/3/2023 | View on chart |
| TENB | ▼ Sell | Open Market | 921 | $39K | 8/25/2023 | View on chart |
| TENB | ▼ Sell | Open Market | 2,584 | $112K | 8/24/2023 | View on chart |
| TENB | ▲ Buy | Option Exercise | 1,362 | $0 | 8/23/2023 | View on chart |
| TENB | ▲ Buy | Option Exercise | 3,856 | $0 | 8/23/2023 | View on chart |
| TENB | ▼ Sell | Open Market | 12,531 | $566K | 8/22/2023 | View on chart |
| TENB | ▼ Sell | Open Market | 2,195 | $98K | 8/18/2023 | View on chart |
| TENB | ▲ Buy | Option Exercise | 4,561 | $0 | 8/17/2023 | View on chart |
| TENB | ▼ Sell | Open Market | 6,396 | $301K | 8/4/2023 | View on chart |
| TENB | ▲ Buy | Option Exercise | 13,103 | $0 | 8/3/2023 | View on chart |
| TENB | ▼ Sell | Open Market | 2,516 | $94K | 5/24/2023 | View on chart |
| TENB | ▲ Buy | Option Exercise | 5,218 | $0 | 5/23/2023 | View on chart |
| TENB | ▼ Sell | Open Market | 2,203 | $84K | 5/18/2023 | View on chart |
| TENB | ▲ Buy | Option Exercise | 4,561 | $0 | 5/17/2023 | View on chart |
| TENB | ▼ Sell | Open Market | 6,245 | $220K | 5/4/2023 | View on chart |
| TENB | ▲ Buy | Option Exercise | 13,102 | $0 | 5/3/2023 | View on chart |
| TENB | ▼ Sell | Open Market | 2,464 | $109K | 2/28/2023 | View on chart |
| TENB | ▼ Sell | Open Market | 2,472 | $109K | 2/27/2023 | View on chart |
| TENB | ▼ Sell | Open Market | 4,204 | $181K | 2/24/2023 | View on chart |
| TENB | ▲ Buy | Option Exercise | 5,450 | $0 | 2/23/2023 | View on chart |
| TENB | ▲ Buy | Option Exercise | 15,427 | $0 | 2/23/2023 | View on chart |
| TENB | ▼ Sell | Open Market | 1,370 | $59K | 2/21/2023 | View on chart |
| TENB | ▲ Buy | Option Exercise | 4,561 | $0 | 2/17/2023 | View on chart |
| TENB | ▼ Sell | Open Market | 4,002 | $173K | 2/6/2023 | View on chart |
| TENB | ▲ Buy | Option Exercise | 13,102 | $0 | 2/3/2023 | View on chart |
| TENB | ▼ Sell | Open Market | 2,565 | $99K | 11/21/2022 | View on chart |
| TENB | ▼ Sell | Open Market | 1,996 | $77K | 11/18/2022 | View on chart |
| TENB | ▲ Buy | Option Exercise | 4,561 | $0 | 11/17/2022 | View on chart |
AI Market Commentary
AI-generatedAll commentary →Synthesized from recent news and fundamentals/technical data -- not human analyst commentary or trader sentiment.
October 10, 2026
Tenable Boosts AI Security, Credit Rating, Board, Shares Rise
Tenable has announced the use of OpenAI GPT models in its CyberAgents platform, expanding automated security reviews. The company also received a BB+ credit rating upgrade from S&P before withdrawing the request. Charlie Bell joined the board, adding experience from the cybersecurity industry. These developments coincided with a sharp rise in Tenable shares.
Tenable Boosts AI Security, Credit Rating, Board, Shares Rise. Tenable has announced the use of OpenAI GPT models in its CyberAgents platform, expanding automated security reviews. The company also received a BB+ credit rating upgrade from S&P before withdrawing the request. Charlie Bell joined the board, adding experience from the cybersecurity industry. These developments coincided with a sharp rise in Tenable shares.