A. Brooke Seawell - 02 Nov 2026 Form 4 Insider Report for Tenable Holdings, Inc. (TENB)

Reporting relationship: Director
Issuer ticker: TENB
Reported as of: 02 Nov 2026
Net transaction value: -$1,485,900
SEC form: 4
Accepted by SEC: 04 Nov 2026, 19:12:45 UTC
Prior SEC filing: 29 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ David Bartholomew, Attorney-in-Fact

Filing notes and source

Key filing fact

A. Brooke Seawell filed Form 4 for Tenable Holdings, Inc. (TENB) on 04 Nov 2026.

Key facts

This page summarizes A. Brooke Seawell's Form 4 filing for Tenable Holdings, Inc. (TENB).
4 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 04 Nov 2026, 19:12.

Change

Previous filing in this sequence was filed on 29 Jun 2026.
Current net transaction value: -$1,485,900.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001197652 Primary reporting owner

SEAWELL A BROOKE

Relationship: Director
Address: C/O TENABLE HOLDINGS, INC., 6100 MERRIWEATHER DRIVE, COLUMBIA
Signature: /s/ David Bartholomew, Attorney-in-Fact
Signature date: 04 Nov 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

TENB transaction

Common Stock

Options Exercise

Transaction value
Shares: +115,000
Change %: +752%
Price: $9.66^*
Shares after: 130,292
Date: 02 Nov 2026
Ownership: Direct

TENB transaction

Common Stock

Sale

Transaction value: -$754,950
Shares: -15,000
Change %: -12%
Price: $50.33
Shares after: 115,292
Date: 02 Nov 2026
Ownership: Direct
Footnotes: F1

TENB transaction

Common Stock

Sale

Transaction value: -$730,950
Shares: -15,000
Change %: -100%
Price: $48.73
Shares after: 0
Date: 02 Nov 2026
Ownership: Trust
Footnotes: F2, F3

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

TENB transaction Derivative

Stock Option (right to buy)

Options Exercise

Transaction value
Shares: -115,000
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 02 Nov 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 115,000
Exercise price: $9.66
Footnotes: F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $50.26 - $50.47, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1) and (2) to this Form 4.

Footnote F2

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $48.43 - $49.11, inclusive.

Footnote F3

Reporting Person is Trustee of the Alexander Brooke Seawell Revocable Trust.

Footnote F4

100% of the shares underlying the option were vested as of October 26, 2021.