Mark C. Thurmond

TENB

Mark C. Thurmond serves as Co-Chief Executive Officer at Tenable Holdings, Inc. (TENB). This page tracks their complete SEC Form 4 insider trading history including stock purchases and sales.

Total Buys

0 trades

$0.00

Total Sells

43 trades

$9.33M

Net Position

Net Seller

$9.33M

Companies Traded

TENB

Active Period

Nov 2022 – Nov 2025

43 total trades

Most Recent

Sell TENB

Nov 24, 2025 · $207.8K

Mark C. Thurmond's Insider Trading at Tenable Holdings, Inc. (TENB)

Buys

0 · $0.00

Sells

43 · $9.33M

Total Shares Bought

Total Shares Sold

226,207

TENB Price Chart

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Date	Type	Shares	Avg Price	Value	Shares After
Nov 24, 2025	Sell	8,092	$25.68	$207.8K	0
Aug 26, 2025	Sell	2,541	$29.84	$75.8K	0
Aug 22, 2025	Sell	28,500	$30.25	$862.1K	0
May 27, 2025	Sell	2,483	$32.45	$80.6K	0
May 22, 2025	Sell	5,577	$31.98	$178.4K	0
Feb 26, 2025	Sell	10,862	$38.17	$414.6K	0
Feb 21, 2025	Sell	3,606	$38.48	$138.8K	0
Feb 20, 2025	Sell	1,341	$39.56	$53.0K	41,266
Dec 2, 2024	Sell	939	$42.95	$40.3K	38,046
Nov 27, 2024	Sell	3,423	$42.57	$145.7K	41,522
Nov 26, 2024	Sell	2,343	$42.74	$100.1K	37,188
Nov 22, 2024	Sell	823	$40.71	$33.5K	34,657
Nov 20, 2024	Sell	2,209	$40.72	$90.0K	35,480
Aug 28, 2024	Sell	4,334	$41.52	$179.9K	36,581
Aug 26, 2024	Sell	2,357	$41.54	$97.9K	32,242
Aug 22, 2024	Sell	818	$42.17	$34.5K	29,725
Aug 21, 2024	Sell	2,224	$42.36	$94.2K	30,543
Aug 1, 2024	Sell	4,700	$49.01	$230.3K	28,206
May 29, 2024	Sell	949	$43.97	$41.7K	32,906
May 28, 2024	Sell	5,752	$43.27	$248.9K	36,361
May 23, 2024	Sell	820	$43.55	$35.7K	29,515
May 21, 2024	Sell	2,219	$43.76	$97.1K	30,335
Mar 22, 2024	Sell	10,824	$49.00	$530.4K	27,993
Feb 29, 2024	Sell	7,122	$47.13	$335.6K	44,176
Feb 27, 2024	Sell	8,794	$47.71	$419.6K	47,162
Feb 22, 2024	Sell	2,539	$46.87	$119.0K	48,846
Feb 9, 2024	Sell	26,175	$51.45	$1.35M	27,325
Feb 7, 2024	Sell	3,976	$47.34	$188.2K	53,500
Nov 30, 2023	Sell	951	$42.06	$40.0K	44,373
Nov 27, 2023	Sell	3,328	$40.02	$133.2K	45,324
Nov 21, 2023	Sell	4,554	$39.83	$181.4K	43,434
Nov 7, 2023	Sell	6,368	$36.93	$235.2K	43,427
Aug 29, 2023	Sell	921	$42.73	$39.4K	36,692
Aug 24, 2023	Sell	15,115	$44.88	$678.3K	37,613
Aug 21, 2023	Sell	2,195	$44.44	$97.5K	47,510
Aug 7, 2023	Sell	6,396	$47.09	$301.2K	45,144
May 25, 2023	Sell	2,516	$37.54	$94.5K	37,769
May 19, 2023	Sell	2,203	$38.28	$84.3K	35,067
May 5, 2023	Sell	6,245	$35.18	$219.7K	32,709
Feb 28, 2023	Sell	9,140	$43.58	$398.3K	30,788
Feb 22, 2023	Sell	1,370	$42.88	$58.7K	14,115
Feb 7, 2023	Sell	4,002	$43.25	$173.1K	10,924
Nov 21, 2022	Sell	4,561	$38.54	$175.8K	4,389