[Form 4] Vertex, Inc. Insider Trading Activity

Rhea-AI Filing Summary

A significant insider transaction was reported for Vertex (VERX) involving the ITEM SECOND IRR. TRUST FBO ANNE MARIE WESTPHAL, a 10% owner and 13(D) group member. The trust executed three substantial sales of Class A Common Stock over consecutive days:

• June 16, 2025: Sold 78,248 shares at average price of $36.87
• June 17, 2025: Sold 145,111 shares at average price of $37.16
• June 18, 2025: Sold 157,874 shares at average price of $35.93

Following these transactions, the trust's holdings decreased from approximately 500,000 shares to 196,841 shares, representing a significant reduction of about 60% in their position. The sales were executed at prices ranging from $35.31 to $37.57 per share, with a total transaction value of approximately $14 million.

Positive

• None.

Negative

• Large insider sale: Trust beneficially owned by 10% owner Anne Marie Westphal sold a total of 381,233 shares worth approximately $14 million over three consecutive days, reducing position by nearly 61% from 499,826 to 196,841 shares

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^*

ITEM SECOND IRR. TRUST FBO ANNE MARIE WESTPHAL u/a of JEFFREY R. WESTPHAL dated October 5, 2001

(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)

	Director	X	10% Owner
	Officer (give title below)	X	Other (specify below)
			13(D) GROUP MEMBER

3. Date of Earliest Transaction (Month/Day/Year)
06/16/2025

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	06/16/2025		S		78,248	D	$36.8664(1)	499,825.706	D
Class A Common Stock	06/17/2025		S		145,111	D	$37.161(2)	354,714.706	D
Class A Common Stock	06/18/2025		S		157,874	D	$35.9314(3)	196,840.706	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

Explanation of Responses:

1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $36.70 to $37.08.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $36.845 to $37.57.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $35.31 to $36.915.

	/s/ Anne Marie Westphal, as Trustee	06/18/2025
	** 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.

FAQ

How many shares of VERX stock did the ITEM SECOND IRR. TRUST sell in June 2025?

The trust sold a total of 381,233 shares of VERX Class A Common Stock across three days: 78,248 shares on June 16, 145,111 shares on June 17, and 157,874 shares on June 18, 2025.

What was the price range of VERX stock sales on June 16, 2025?

On June 16, 2025, the shares were sold at a weighted average price of $36.8664, with individual transactions ranging from $36.70 to $37.08 per share.

How many shares of VERX does the trust still own after these transactions?

After the reported transactions, the trust retained direct ownership of 196,840.706 shares of VERX Class A Common Stock.

What was the largest single-day sale of VERX stock by the trust?

The largest single-day sale occurred on June 18, 2025, when the trust sold 157,874 shares at a weighted average price of $35.9314 per share.

What is the relationship between the reporting person and VERX?

The reporting person (ITEM SECOND IRR. TRUST) is identified as both a 10% Owner of VERX and a 13(D) GROUP MEMBER according to the Form 4 filing.