Tenable director awarded 9,718 RSUs

Tenable Holdings director George Alex Tosheff reported equity compensation activity involving restricted stock units (RSUs) and common shares.

Accepted by SEC EDGAR 05/15/2026 - 05:12 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Tenable Holdings director George Alex Tosheff reported equity compensation activity involving restricted stock units (RSUs) and common shares. On May 13, 2026, 6,062 RSUs fully vested and were converted into 6,062 shares of common stock, bringing his directly held common shares to 31,344.

On the same date, Tosheff received a new grant of 9,718 RSUs, each representing a right to receive one share of Tenable common stock. These RSUs vest 100% on the earlier of May 13, 2027 or the company’s next annual shareholder meeting, subject to his continued service and specified acceleration conditions.

Insider Trade Summary

6,062 shares exercised/converted

Exercise 3 txns

Insider Tosheff George Alex

Role Director

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	6,062	$0.00	$0.00
Grant/Award	Restricted Stock Units	9,718	$0.00	$0.00
Exercise	Common Stock	6,062	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 9,718 contracts (Direct); Common Stock — 31,344 shares (Direct)

Footnotes (3)

1. F1. Each restricted stock unit ("RSU") represents a contingent right to receive one share of Issuer common stock.
2. F2. 100% of the shares underlying the RSUs vested as of May 13, 2026.
3. F3. 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.

Key Figures

RSUs vested and converted: 6,062 units/shares New RSU grant: 9,718 units Common shares held after transactions: 31,344 shares +2 more

5 metrics

RSUs vested and converted 6,062 units/shares RSUs vested and settled into common stock on May 13, 2026

New RSU grant 9,718 units Restricted stock units granted on May 13, 2026

Common shares held after transactions 31,344 shares Directly held common stock following reported transactions

RSU-to-share ratio 1 RSU : 1 share Each RSU represents one Tenable common share

Vesting date for new RSUs Earlier of May 13, 2027 or next meeting 100% vesting trigger for 9,718 new RSUs, subject to service

Key Terms

Restricted Stock Units, vested, annual shareholder meeting, continuous service

4 terms

Restricted Stock Units financial

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

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

vested financial

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

annual shareholder meeting financial

"100% of the shares underlying the RSUs vest on the earlier of May 13, 2027 or the Issuer's next annual shareholder meeting..."

A yearly gathering where a company’s owners (shareholders) and its leaders meet to review performance, approve key decisions like electing directors, and vote on issues such as executive pay or major policy changes. Think of it as an annual town hall for people who own part of the business: investors use it to ask questions, influence direction through votes, and gauge management’s plans and transparency, all of which can affect the stock’s outlook.

continuous service financial

"...subject to the Reporting Person's continuous service with the Issuer as of the applicable vesting date..."

FAQ

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

What insider equity transactions did Tenable (TENB) report for George Alex Tosheff?

Tenable director George Alex Tosheff reported equity compensation transactions. 6,062 restricted stock units vested into 6,062 common shares, and he received a new grant of 9,718 RSUs, each convertible into one Tenable common share at future vesting.

How many Tenable (TENB) shares does George Alex Tosheff hold after these Form 4 transactions?

After these transactions, George Alex Tosheff directly holds 31,344 shares of Tenable common stock. This reflects settlement of 6,062 vested RSUs into common shares, with the new 9,718 RSU grant remaining as a separate derivative equity award.

What are the key terms of the new 9,718 RSU grant at Tenable (TENB)?

The new grant covers 9,718 restricted stock units, each representing one future Tenable common share. These RSUs vest 100% on the earlier of May 13, 2027 or Tenable’s next annual shareholder meeting, assuming Tosheff’s continuous service and certain acceleration conditions.

Did George Alex Tosheff buy or sell Tenable (TENB) shares in the open market?

The reported transactions are equity compensation events, not open-market trades. They include vesting and conversion of 6,062 previously granted RSUs into common shares and a new award of 9,718 RSUs, both at a stated price per unit of $0.00.

How do Tenable (TENB) restricted stock units convert into common shares?

Each restricted stock unit represents a contingent right to receive one Tenable common share. When vesting conditions are met, RSUs settle into common stock, as shown by 6,062 RSUs vesting and converting into 6,062 shares reported in this Form 4 filing.

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^*

Tosheff George Alex

(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)
05/13/2026

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	05/13/2026		M		6,062	A	$0	31,344	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)	05/13/2026		M			6,062	(2)	(2)	Common Stock	6,062	$0	0	D
Restricted Stock Units	(1)	05/13/2026		A		9,718		(3)	(3)	Common Stock	9,718	$0	9,718	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 as of May 13, 2026.

3. 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.

Remarks:

	/s/ David Bartholomew, Attorney-in-Fact	05/15/2026
	** 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)