Tenable director exercises options for 115,000 shares

The sale entries distinguish shares held directly from 15,000 shares held by the revocable trust for which the director is trustee.

Available on EDGAR 11/04/2026 - 07:13 PM EST Accepted by SEC EDGAR 11/04/2026 - 07:12 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Tenable Holdings, Inc. director A. Brooke Seawell exercised options for 115,000 common shares at a $9.66 exercise price on November 2, 2026. Seawell also sold 15,000 shares directly at a weighted-average $50.33 per share; another 15,000 shares held by the Alexander Brooke Seawell Revocable Trust were sold at a weighted-average $48.73. Seawell is the trust’s trustee. No Rule 10b5-1 plan is reported.

Insider Trade Summary

Exercise and sale activity reported; no spread calculated

Exercise and Sale 4 txns

Insider SEAWELL A BROOKE

Role Director

Sold 30,000 shs ($1.49M)

Approx. gross sale proceeds $1.49M

Approx. exercise cost $1.11M

Type	Security	Shares	Price	Value
Exercise	Stock Option (right to buy) F4	115,000	$0.00	$0.00
Exercise	Common Stock	115,000	$9.66	$1.11M
Sale	Common Stock F1	15,000	$50.33	$755K
Sale	Common Stock F2, F3	15,000	$48.73	$731K

Holdings After Transaction: Stock Option (right to buy) — 0 contracts (Direct); Common Stock — 115,292 shares (Direct); Common Stock — 0 shares (Indirect, Trust)

Footnotes (4)

1. 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.
2. 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.
3. F3. Reporting Person is Trustee of the Alexander Brooke Seawell Revocable Trust.
4. F4. 100% of the shares underlying the option were vested as of October 26, 2021.

Key Figures

Options exercised: 115,000 shares Exercise price: $9.66 per share Common shares acquired: 115,000 shares +4 more

7 metrics

Options exercised 115,000 shares November 2, 2026

Exercise price $9.66 per share Options exercised November 2, 2026

Common shares acquired 115,000 shares November 2, 2026

Direct shares sold 15,000 shares November 2, 2026

Weighted-average sale price $50.33 per share Direct sale on November 2, 2026

Trust shares sold 15,000 shares Alexander Brooke Seawell Revocable Trust, November 2, 2026

Weighted-average sale price $48.73 per share Trust sale on November 2, 2026

Key Terms

weighted average price, vested, Revocable Trust

3 terms

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

vested technical

"100% of the shares underlying the option were vested"

Revocable Trust technical

"Alexander Brooke Seawell Revocable Trust"

A revocable trust is a legal arrangement where the person who creates it keeps control and can change or cancel the trust at any time, while naming who will manage and receive the assets later. Think of it like a flexible folder for your investments and property that can be relabeled or reworked as circumstances change; it matters to investors because it determines how ownership is recorded, how easily assets transfer on incapacity or death, and whether holdings bypass public probate proceedings.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many TENB shares did A. Brooke Seawell sell, and at what prices?

On November 2, 2026, A. Brooke Seawell sold 15,000 shares directly at a weighted-average $50.33 per share, and 15,000 shares held by the Alexander Brooke Seawell Revocable Trust were sold at a weighted-average $48.73. The respective transaction price ranges were $50.26–$50.47 and $48.43–$49.11. No Rule 10b5-1 plan is reported.

How many TENB shares did A. Brooke Seawell acquire through option exercise?

Seawell exercised options for 115,000 common shares at a $9.66 exercise price on November 2, 2026. The shares underlying the option were 100% vested as of October 26, 2021.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

SEAWELL A BROOKE

(Last) (First) (Middle)

C/O TENABLE HOLDINGS, INC.

6100 MERRIWEATHER DRIVE

(Street)

COLUMBIA MARYLAND 21044

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Tenable Holdings, Inc. [ TENB ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
11/02/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	11/02/2026		M		115,000	A	$9.66	130,292	D
Common Stock	11/02/2026		S		15,000	D	$50.33(1)	115,292	D
Common Stock	11/02/2026		S		15,000	D	$48.73(2)	0	I	Trust(3)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (right to buy)	$9.66	11/02/2026		M			115,000	(4)	10/26/2027	Common Stock	115,000	$0	0	D

Explanation of Responses:

1. 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.

2. 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.

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

4. 100% of the shares underlying the option were vested as of October 26, 2021.

Remarks:

	/s/ David Bartholomew, Attorney-in-Fact	11/04/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)