Ryan J. Leib - 19 Feb 2026 Form 4 Insider Report for Vertex, Inc. (VERX)

Role: Chief Accounting Officer
Signature: /s/ Lisa Coleman, Attorney-in-Fact
Issuer symbol: VERX
Transactions as of: 19 Feb 2026
Net transactions value: $0
Form type: 4
Filing time: 23 Feb 2026, 16:46:15 UTC
Previous filing: 03 Feb 2026
Next filing: 24 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Leib Ryan J	Chief Accounting Officer	C/O VERTEX, INC., 2301 RENAISSANCE BLVD., KING OF PRUSSIA	/s/ Lisa Coleman, Attorney-in-Fact	23 Feb 2026	0001659260

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	VERX	Restricted Stock Units	Award	$0	+33,891		$0.000000	33,891	19 Feb 2026	Class A Common Stock	33,891		Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Each restricted stock unit represents a contingent right to receive one share of the Issuers Class A Common Stock.
F2	Represents an award of restricted stock units that will vest as to 25% of the amount of shares on each of February 19, 2027, February 19, 2028, February 19, 2029 and February 19, 2030.