ERIC C. ANDERSEN - 20 Feb 2026 Form 4 Insider Report for Vertex, Inc. (VERX)

Role: Director
Signature: /s/ Lisa Coleman, Attorney-in-Fact
Issuer symbol: VERX
Transactions as of: 20 Feb 2026
Net transactions value: +$516,400
Form type: 4
Filing time: 23 Feb 2026, 16:47:08 UTC
Previous filing: 13 Jun 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
ANDERSEN ERIC C.	Director	C/O VERTEX, INC., 2301 RENAISSANCE BLVD, KING OF PRUSSIA	/s/ Lisa Coleman, Attorney-in-Fact	23 Feb 2026	0001552411

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	VERX	Class A Common Stock	Purchase	$516,400	+40,000	+36%	$12.91	150,341	20 Feb 2026	Direct	F1

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

Explanation of Responses:

Id	Content
F1	The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $12.87 to $12.96, inclusive. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth above.

Content

The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $12.87 to $12.96, inclusive. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth above.