Tenable Holdings Inc. Insider Trading

TENB

Last 12 months

Insiders bought 616K and sold $4.55M on the open market.

1% of the selling was scheduled in advance under 10b5-1 plans. Director A Brooke Seawell sold $2.85M on Dec 15, 2025, 83% of their stake, outside a plan.

Net open-market

−$3.93M

3 buys · 5 sales

Under a 10b5-1 plan

of the value sold

Insiders who bought / sold

3 / 3

executives and directors

Last open-market buy

May 2026

May 4, 2026

Get an email when TENB's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Nov 2	Barron Anschutz Other	SoldNo plan	10,000	$51.00	510K	13%	Form 4
Nov 2	A Brooke Seawell Director	SoldNo plan 2 parts	30,000	$49.53 average	$1.49M	21%	Form 4
Aug 18 – 19	Linda Kay Zecher Director	SoldNo plan 2 parts	1,390	$35.61 average	49K	17%	Form 4
Aug 7	Raymond Vicks Jr. Director	Sold10b5-1 plan	1,819	$35.94	65K	6.8%	Form 4
Aug 3 – 7	Linda Kay Zecher Director	SoldNo plan 3 parts	2,620	$34.98 average	92K	24%	Form 4
May 4	Matthew Charles Brown Chief Financial Officer	Bought	12,000	$21.54	258K	65%	Form 4
Feb 12	Raymond Vicks Jr. Director	Bought	4,500	$22.17	100K	28%	Form 4
Feb 9	Arthur W Coviello Jr Director	Bought	12,000	$21.50	258K	30%	Form 4
Dec 15, 2025	A Brooke Seawell Director	SoldNo plan	115,000	$24.82	$2.85M	83%	Form 4
Oct 17, 2025	Barron Anschutz Other	SoldNo plan	976	$29.10	28K	1.6%	Form 4
Sep 9, 2025	A Brooke Seawell Director	SoldNo plan	15,000	$30.80	462K	38%	Form 4
Sep 4, 2025	A Brooke Seawell Director	SoldNo plan	4,622	$30.12	139K	11%	Form 4
Aug 26, 2025	Mark C. Thurmond Co-Chief Executive Officer	SoldNo plan	2,541	$29.84	76K	2.4%	Form 4
Aug 26, 2025	Stephen A Vintz Co-Chief Executive Officer	SoldNo plan	3,464	$29.84	103K	0.9%	Form 4
Aug 26, 2025	Barron Anschutz Other	SoldNo plan	670	$29.84	20K	1.1%	Form 4
Aug 25, 2025	Barron Anschutz Other	SoldNo plan	1,261	$30.25	38K	2.0%	Form 4
Aug 25, 2025	Stephen A Vintz Co-Chief Executive Officer	SoldNo plan	29,196	$30.25	883K	7.4%	Form 4
Aug 25, 2025	Mark C. Thurmond Co-Chief Executive Officer	SoldNo plan	28,500	$30.25	862K	21%	Form 4
Jul 17, 2025	Barron Anschutz Other	SoldNo plan	970	$33.08	32K	1.6%	Form 4
May 27, 2025	Mark C. Thurmond Co-Chief Executive Officer	SoldNo plan	2,483	$32.45	81K	3.3%	Form 4
May 27, 2025	Stephen A Vintz Co-Chief Executive Officer	SoldNo plan	3,386	$32.45	110K	1.0%	Form 4
May 27, 2025	Barron Anschutz Other	SoldNo plan	655	$32.45	21K	1.1%	Form 4
May 23, 2025	Mark C. Thurmond Co-Chief Executive Officer	SoldNo plan	5,577	$31.98	178K	6.9%	Form 4
May 23, 2025	Stephen A Vintz Co-Chief Executive Officer	SoldNo plan	6,499	$31.98	208K	1.9%	Form 4
May 23, 2025	Barron Anschutz Other	SoldNo plan	1,245	$31.98	40K	2.1%	Form 4
Mar 11, 2025	Linda Kay Zecher Director	SoldNo plan	2,500	$37.00	93K	88%	Form 4
Feb 28, 2025	Barron Anschutz Other	SoldNo plan	4,405	$37.59	166K	7.5%	Form 4
Feb 26, 2025 – Feb 27, 2025	Stephen A Vintz Co-CEO,Chief Financial Officer	SoldNo plan 2 parts	12,965	$38.17 average	495K	3.9%	Form 4
Feb 26, 2025 – Feb 27, 2025	Mark C. Thurmond Co-CEO,Chief Operating Officer	SoldNo plan 2 parts	10,862	$38.17 average	415K	15%	Form 4
Feb 25, 2025	Mark C. Thurmond Co-CEO,Chief Operating Officer	SoldNo plan	3,606	$38.48	139K	4.6%	Form 4
Feb 25, 2025	Stephen A Vintz Co-CEO,Chief Financial Officer	SoldNo plan	4,551	$38.48	175K	1.4%	Form 4
Feb 19, 2025	Mark C. Thurmond Co-CEO,Chief Operating Officer	SoldNo plan	1,341	$39.56	53K	3.1%	Form 4
Feb 19, 2025	Stephen A Vintz Co-CEO,Chief Financial Officer	SoldNo plan	1,922	$39.56	76K	0.7%	Form 4
Jan 8, 2025	Raymond Vicks Jr. Director	Sold10b5-1 plan	809	$38.52	31K	6.5%	Form 4
Nov 27, 2024	Mark C. Thurmond Chief Operating Officer	Sold10b5-1 plan	939	$42.95	40K	2.4%	Form 4
Nov 26, 2024	Mark C. Thurmond Chief Operating Officer	Sold10b5-1 plan 2 parts	3,423	$42.57 average	146K	8.1%	Form 4
Nov 25, 2024 – Nov 26, 2024	Amit Yoran President, CEO and Chairman	SoldNo plan 2 parts	11,046	$42.65 average	471K	1.6%	Form 4
Nov 25, 2024 – Nov 26, 2024	Stephen A Vintz Chief Financial Officer	SoldNo plan 2 parts	6,640	$42.65 average	283K	2.2%	Form 4
Nov 25, 2024	Mark C. Thurmond Chief Operating Officer	SoldNo plan	2,343	$42.74	100K	5.2%	Form 4
Nov 20, 2024	Mark C. Thurmond Chief Operating Officer	Sold10b5-1 plan	823	$40.71	34K	2.3%	Form 4

Nov 2No plan
Barron Anschutz
Other · sold 10,000 at $51.00
510K
13% of stake
Nov 2No plan
A Brooke Seawell
Director · sold 30,000 at avg $49.53
$1.49M
21% of stake
Aug 18 – 19No plan
Linda Kay Zecher
Director · sold 1,390 at avg $35.61
49K
17% of stake
Aug 710b5-1 plan
Raymond Vicks Jr.
Director · sold 1,819 at $35.94
65K
6.8% of stake
Aug 3 – 7No plan
Linda Kay Zecher
Director · sold 2,620 at avg $34.98
92K
24% of stake
May 4
Matthew Charles Brown
Chief Financial Officer · bought 12,000 at $21.54
258K
65% of stake
Feb 12
Raymond Vicks Jr.
Director · bought 4,500 at $22.17
100K
28% of stake
Feb 9
Arthur W Coviello Jr
Director · bought 12,000 at $21.50
258K
30% of stake
Dec 15, 2025No plan
A Brooke Seawell
Director · sold 115,000 at $24.82
$2.85M
83% of stake
Oct 17, 2025No plan
Barron Anschutz
Other · sold 976 at $29.10
28K
1.6% of stake
Sep 9, 2025No plan
A Brooke Seawell
Director · sold 15,000 at $30.80
462K
38% of stake
Sep 4, 2025No plan
A Brooke Seawell
Director · sold 4,622 at $30.12
139K
11% of stake
Aug 26, 2025No plan
Mark C. Thurmond
Co-Chief Executive Officer · sold 2,541 at $29.84
76K
2.4% of stake
Aug 26, 2025No plan
Stephen A Vintz
Co-Chief Executive Officer · sold 3,464 at $29.84
103K
0.9% of stake
Aug 26, 2025No plan
Barron Anschutz
Other · sold 670 at $29.84
20K
1.1% of stake
Aug 25, 2025No plan
Barron Anschutz
Other · sold 1,261 at $30.25
38K
2.0% of stake
Aug 25, 2025No plan
Stephen A Vintz
Co-Chief Executive Officer · sold 29,196 at $30.25
883K
7.4% of stake
Aug 25, 2025No plan
Mark C. Thurmond
Co-Chief Executive Officer · sold 28,500 at $30.25
862K
21% of stake
Jul 17, 2025No plan
Barron Anschutz
Other · sold 970 at $33.08
32K
1.6% of stake
May 27, 2025No plan
Mark C. Thurmond
Co-Chief Executive Officer · sold 2,483 at $32.45
81K
3.3% of stake
May 27, 2025No plan
Stephen A Vintz
Co-Chief Executive Officer · sold 3,386 at $32.45
110K
1.0% of stake
May 27, 2025No plan
Barron Anschutz
Other · sold 655 at $32.45
21K
1.1% of stake
May 23, 2025No plan
Mark C. Thurmond
Co-Chief Executive Officer · sold 5,577 at $31.98
178K
6.9% of stake
May 23, 2025No plan
Stephen A Vintz
Co-Chief Executive Officer · sold 6,499 at $31.98
208K
1.9% of stake
May 23, 2025No plan
Barron Anschutz
Other · sold 1,245 at $31.98
40K
2.1% of stake
Mar 11, 2025No plan
Linda Kay Zecher
Director · sold 2,500 at $37.00
93K
88% of stake
Feb 28, 2025No plan
Barron Anschutz
Other · sold 4,405 at $37.59
166K
7.5% of stake
Feb 26, 2025 – Feb 27, 2025No plan
Stephen A Vintz
Co-CEO,Chief Financial Officer · sold 12,965 at avg $38.17
495K
3.9% of stake
Feb 26, 2025 – Feb 27, 2025No plan
Mark C. Thurmond
Co-CEO,Chief Operating Officer · sold 10,862 at avg $38.17
415K
15% of stake
Feb 25, 2025No plan
Mark C. Thurmond
Co-CEO,Chief Operating Officer · sold 3,606 at $38.48
139K
4.6% of stake
Feb 25, 2025No plan
Stephen A Vintz
Co-CEO,Chief Financial Officer · sold 4,551 at $38.48
175K
1.4% of stake
Feb 19, 2025No plan
Mark C. Thurmond
Co-CEO,Chief Operating Officer · sold 1,341 at $39.56
53K
3.1% of stake
Feb 19, 2025No plan
Stephen A Vintz
Co-CEO,Chief Financial Officer · sold 1,922 at $39.56
76K
0.7% of stake
Jan 8, 202510b5-1 plan
Raymond Vicks Jr.
Director · sold 809 at $38.52
31K
6.5% of stake
Nov 27, 202410b5-1 plan
Mark C. Thurmond
Chief Operating Officer · sold 939 at $42.95
40K
2.4% of stake
Nov 26, 202410b5-1 plan
Mark C. Thurmond
Chief Operating Officer · sold 3,423 at avg $42.57
146K
8.1% of stake
Nov 25, 2024 – Nov 26, 2024No plan
Amit Yoran
President, CEO and Chairman · sold 11,046 at avg $42.65
471K
1.6% of stake
Nov 25, 2024 – Nov 26, 2024No plan
Stephen A Vintz
Chief Financial Officer · sold 6,640 at avg $42.65
283K
2.2% of stake
Nov 25, 2024No plan
Mark C. Thurmond
Chief Operating Officer · sold 2,343 at $42.74
100K
5.2% of stake
Nov 20, 202410b5-1 plan
Mark C. Thurmond
Chief Operating Officer · sold 823 at $40.71
34K
2.3% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch TENB, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Held by ETFs

TENB is in 100 US ETFs. The largest of them, with TENB's weight in each:

Spot a number that looks wrong? Check it in TENB's SEC filings or

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Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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