Jeffrey Westphal - 09 Jun 2025 Form 4 Insider Report for Vertex, Inc. (VERX)

Role: Other*
Signature: /s/ Anton Pamer, Attorney-in-Fact
Issuer symbol: VERX
Transactions as of: 09 Jun 2025
Net transactions value: -$115,350,000
Form type: 4
Filing time: 11 Jun 2025, 15:21:46 UTC
Previous filing: 03 Jan 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Westphal Jeffrey	Other*	C/O VERTEX, INC., 2301 RENAISSANCE BLVD, KING OF PRUSSIA	/s/ Anton Pamer, Attorney-in-Fact	11 Jun 2025	0001818851

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	VERX	Class A Common Stock	Conversion of derivative security	$0	+1,514,000		$0.000000	1,514,000	09 Jun 2025	By The 2009 Jeffrey R. Westphal Generation Skipping Trust
transaction	VERX	Class A Common Stock	Sale	$58,213,300	-1,514,000	-100%	$38.45	0	09 Jun 2025	By The 2009 Jeffrey R. Westphal Generation Skipping Trust	F2
transaction	VERX	Class A Common Stock	Conversion of derivative security	$0	+1,153,756		$0.000000	1,153,756	09 Jun 2025	By Rainer J. Westphal 2007 Separate Exempt Trust FBO Jeffrey Westphal
transaction	VERX	Class A Common Stock	Sale	$44,361,918	-1,153,756	-100%	$38.45	0	09 Jun 2025	By Rainer J. Westphal 2007 Separate Exempt Trust FBO Jeffrey Westphal	F2
transaction	VERX	Class A Common Stock	Conversion of derivative security	$0	+332,244		$0.000000	332,244	09 Jun 2025	By Rainer J. Westphal 2007 Separate Non-Exempt Trust FBO Jeffrey Westphal
transaction	VERX	Class A Common Stock	Sale	$12,774,782	-332,244	-100%	$38.45	0	09 Jun 2025	By Rainer J. Westphal 2007 Separate Non-Exempt Trust FBO Jeffrey Westphal	F2
holding	VERX	Class A Common Stock						7,895	09 Jun 2025	Direct

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

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Ownership	Footnotes
transaction	VERX	Class B Common Stock	Conversion of derivative security	$0	-1,514,000	-57%	$0.000000	1,125,927	09 Jun 2025	Class A Common Stock	1,514,000	By The 2009 Jeffrey R. Westphal Generation Skipping Trust	F1
transaction	VERX	Class B Common Stock	Conversion of derivative security	$0	-1,153,756	-100%	$0.000000	0	09 Jun 2025	Class A Common Stock	1,153,756	By Rainer J. Westphal 2007 Separate Exempt Trust FBO Jeffrey Westphal	F1
transaction	VERX	Class B Common Stock	Conversion of derivative security	$0	-332,244	-100%	$0.000000	0	09 Jun 2025	Class A Common Stock	332,244	By Rainer J. Westphal 2007 Separate Non-Exempt Trust FBO Jeffrey Westphal	F1
holding	VERX	Class B Common Stock						388,000	09 Jun 2025	Class A Common Stock	388,000	Direct	F1

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

Explanation of Responses:

Id	Content
F1	The Class B Common Stock is convertible at any time at the option of the holder into one share of the Issuer's Class A Common Stock and has no expiration date. The Class B Common Stock will automatically convert into shares of the Issuer's Class A Common Stock on a one-to-one basis either (i) upon any transfer of the Class B Common Stock by the holder, whether or not for value, subject to certain exceptions or (ii) if the voting power of the Issuer's outstanding Class B Common Stock represents less than 10% of the combined voting power of all of the Issuer's outstanding common stock.
F2	The reported securities were sold in a block sale at a per share price of $38.45.

Content

The Class B Common Stock is convertible at any time at the option of the holder into one share of the Issuer's Class A Common Stock and has no expiration date. The Class B Common Stock will automatically convert into shares of the Issuer's Class A Common Stock on a one-to-one basis either (i) upon any transfer of the Class B Common Stock by the holder, whether or not for value, subject to certain exceptions or (ii) if the voting power of the Issuer's outstanding Class B Common Stock represents less than 10% of the combined voting power of all of the Issuer's outstanding common stock.

The reported securities were sold in a block sale at a per share price of $38.45.

Remarks:

By virtue of being party to a certain Third Amended and Restated Stockholders' Agreement (the "Stockholders'Agreement"), the Reporting Person may be deemed to be a member of a "group" for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), with respect to the securities reported herein with the other parties who are bound by the Stockholders'Agreement, which such "group" beneficially owns, in the aggregate, in excess of 10% of the outstanding shares of common stock of the Issuer. The Reporting Person disclaims beneficial ownership of any securities owned by any of the other signatories to the Stockholders'Agreement and the filing of this Form 4 shall not be deemed an admission, for purposes of Section 16 of the Exchange Act or otherwise, that the Reporting Person and any other person or persons constitute a "group" for purposes of Section 13(d)(3) of the Exchange Act or Rule 13d-5 thereunder. The Reporting Person does not have any pecuniary interest in any of the securities beneficially owned by any of the other signatories to the Stockholders'Agreement.