Vertex (VERX) director converts 109,233 RSUs and disposes shares for taxes

Rhea-AI Filing Summary

Vertex, Inc. director David DeStefano exercised 109,233 restricted stock units, converting them into the same number of shares of Class A Common Stock. Each restricted stock unit represents a right to receive one share, and this award is fully vested.

To cover tax obligations, 51,983 Class A shares were disposed of at $13.26 per share through a tax-withholding transaction, leaving DeStefano with 1,255,517 Class A shares held directly. In addition, 204,032 Class A shares are held indirectly by family trusts for his three adult children, where his spouse serves as trustee.

Insider Trade Summary

109,233 shares exercised/converted

Mixed 4 txns

Insider DeStefano David

Role Director

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	109,233	$0.00	--
Exercise	Class A Common Stock	109,233	$0.00	--
Tax Withholding	Class A Common Stock	51,983	$13.26	$689K
holding	Class A Common Stock	--	--	--

Holdings After Transaction: Restricted Stock Units — 0 shares (Direct); Class A Common Stock — 1,307,500 shares (Direct); Class A Common Stock — 204,032 shares (Indirect, By Family Trusts)

Footnotes (1)

1. Represents securities held by individual trusts for the benefit of the Reporting Person's three adult children. The Reporting Person's spouse serves as a trustee of each such trust. Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock. This restricted stock unit award is fully vested.

Form 4 Insider Transactions: What Each Field Means →

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^*

DeStefano David

(Last) (First) (Middle)

C/O VERTEX, INC.

2301 RENAISSANCE BLVD

(Street)

KING OF PRUSSIA PA 19406

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Vertex, Inc. [ VERX ]

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)
02/24/2026

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
Class A Common Stock	02/24/2026		M		109,233	A	$0	1,307,500	D
Class A Common Stock	02/24/2026		F		51,983	D	$13.26	1,255,517	D
Class A Common Stock								204,032	I	By Family Trusts(1)

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	(2)	02/24/2026		M			109,233	(3)	(3)	Class A Common Stock	109,233	$0	0	D

Explanation of Responses:

1. Represents securities held by individual trusts for the benefit of the Reporting Person's three adult children. The Reporting Person's spouse serves as a trustee of each such trust.

2. Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock.

3. This restricted stock unit award is fully vested.

	/s/ Lisa Coleman, Attorney-in-Fact	02/26/2026
	** 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.