[Form 4] Tenable Holdings, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Tenable Holdings director George Alex Tosheff had 3,288 restricted stock units (RSUs) vest 100% on September 28, 2025 and the resulting 3,288 shares were acquired on September 29, 2025 at a reported price of $0 per share. After the transaction he beneficially owns 25,282 shares of Tenable common stock. The Form 4 was submitted on behalf of the reporting person and signed by an attorney-in-fact, David Bartholomew, on September 30, 2025. The filing reflects a routine director vesting and share acquisition rather than an open-market purchase or sale.

Positive

• Director ownership increased by 3,288 shares through RSU vesting, bringing total beneficial ownership to 25,282 shares
• Vesting completed 100% of the referenced RSUs on September 28, 2025, indicating fulfillment of compensation conditions

Negative

• None.

Insights

Corporate Governance Expert

TL;DR: Director equity vesting increases insider alignment with shareholders but appears routine and non-cash.

The Form 4 documents a standard equity compensation event: 3,288 RSUs vested and converted to common shares, resulting in 25,282 shares beneficially owned. This is a common mechanism to retain and align directors. The transaction was executed at $0 because vested RSUs convert into shares rather than representing a cash purchase. No sales or market transactions are reported, indicating no immediate insider liquidity action. Filing by an attorney-in-fact conforms to standard insider reporting practice.

Securities Analyst

TL;DR: Routine vesting increased insider ownership modestly; no market-impacting activity disclosed.

The entry shows 3,288 shares added to the director's beneficial ownership via RSU vesting, raising total to 25,282 shares. Because the shares resulted from compensation vesting rather than a purchase or sale, there is no cash transaction or price discovery effect. For investors, the action modestly increases insider stake but does not signal buying or selling intent in the open market. The filing includes the expected explanatory notes clarifying RSU conversion and vesting date.

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

1. Name and Address of Reporting Person^*

Tosheff George Alex

(Last) (First) (Middle)

C/O TENABLE HOLDINGS, INC.

6100 MERRIWEATHER DRIVE

(Street)

COLUMBIA MD 21044

(City) (State) (Zip)

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)

3. Date of Earliest Transaction (Month/Day/Year)
09/29/2025

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

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

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

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	09/29/2025		M		3,288	A	$0	25,282	D

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
Restricted Stock Units	(1)	09/29/2025		M			3,288	(2)	(2)	Common Stock	3,288	$0	0	D

Explanation of Responses:

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

2. 100% of the shares underlying the RSUs vested on September 28, 2025.

Remarks:

	/s/ David Bartholomew, Attorney-in-Fact	09/30/2025
	** 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.

FAQ

What did George Alex Tosheff report on the TENB Form 4?

He reported 3,288 RSUs vested and converted to 3,288 shares acquired on 09/29/2025, resulting in 25,282 shares beneficially owned.

Were the shares purchased on the open market in the TENB filing?

No. The filing shows RSU vesting and conversion to shares at a reported price of $0, not an open-market purchase.

When did the RSUs vest according to the Form 4?

100% of the RSUs vested on September 28, 2025.

Who filed or signed the Form 4 for TENB on behalf of the reporting person?

David Bartholomew, Attorney-in-Fact, signed the Form 4 on 09/30/2025.

How many shares does Tosheff beneficially own after this transaction?

25,282 shares of Tenable common stock are reported as beneficially owned following the transaction.