A. Brooke Seawell - 13 May 2026 Form 4 Insider Report for Tenable Holdings, Inc. (TENB)

Reporting relationship: Director
Issuer ticker: TENB
Reported as of: 13 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 15 May 2026, 17:12:10 UTC
Prior SEC filing: 19 Mar 2026
Next SEC filing: 29 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ David Bartholomew, Attorney-in-Fact

Key filing fact

A. Brooke Seawell filed Form 4 for Tenable Holdings, Inc. (TENB) on 15 May 2026.

Key facts

This page summarizes A. Brooke Seawell's Form 4 filing for Tenable Holdings, Inc. (TENB).
3 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 15 May 2026, 17:12.

Change

Previous filing in this sequence was filed on 19 Mar 2026.
Current net transaction value: $0.

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: 15 May 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: +6,062
Change %: +66%
Price: $0.000000^*
Shares after: 15,292
Date: 13 May 2026
Ownership: Direct

TENB holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 15,000
Date: 13 May 2026
Ownership: Trust
Footnotes: F1

Reported derivative securities

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

TENB transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -6,062
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 13 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 6,062
Exercise price
Footnotes: F2, F3

TENB transaction Derivative

Restricted Stock Units

Award

Transaction value
Shares: +9,718
Change %
Price: $0.000000^*
Shares after: 9,718
Date: 13 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 9,718
Exercise price
Footnotes: F2, 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

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

Footnote F2

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Issuer common stock.

Footnote F3

100% of the shares underlying the RSUs vested as of May 13, 2026.

Footnote F4

100% of the shares underlying the RSUs vest on the earlier of May 13, 2027 or the Issuer's next annual shareholder meeting, subject to the Reporting Person's continuous service with the Issuer as of the applicable vesting date, and subject to accelerated vesting in specified circumstances.