Vertex director granted 15,638 restricted shares

Thompson Stefanie Westphal reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Thompson Stefanie Westphal reported acquisition or exercise transactions in this Form 4 filing.

Vertex, Inc. director and 10% owner Stefanie Westphal Thompson received a grant of 15,638 shares of Class A Common Stock as restricted stock. The award was granted at no cash cost per share and is part of her equity compensation.

The restricted stock will vest on the earlier of the day immediately before the next annual meeting of Vertex stockholders or June 10, 2027. Following this grant, Thompson directly holds 66,995 shares of Class A Common Stock, showing an increased long-term equity stake aligned with shareholder interests.

Insider Trade Summary

Grant/Award: 15,638 shares

Grant/Award 1 txn

Insider Thompson Stefanie Westphal

Role Director, 10% Owner

Type	Security	Shares	Price	Value
Grant/Award	Class A Common Stock	15,638	$0.00	$0.00

Holdings After Transaction: Class A Common Stock — 66,995 shares (Direct)

Footnotes (1)

1. F1. Represents an award of restricted stock that will vest on the earlier to occur of (i) the day immediately prior to the date of the next annual meeting of the Company's stockholders, and (ii) June 10, 2027.

Key Figures

Restricted stock award: 15,638 shares Grant price: $0.0000 per share Shares held after grant: 66,995 shares +1 more

4 metrics

Restricted stock award 15,638 shares Grant of Class A Common Stock as restricted stock

Grant price $0.0000 per share Equity compensation grant, no cash paid by insider

Shares held after grant 66,995 shares Total direct holdings of Class A Common Stock after transaction

Vesting deadline June 10, 2027 Vests earlier of pre-next annual meeting or this date

Key Terms

restricted stock, Class A Common Stock, annual meeting of the Company's stockholders, Grant, award, or other acquisition

4 terms

restricted stock financial

"Represents an award of restricted stock that will vest on the earlier to occur"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

Class A Common Stock financial

"security_title": "Class A Common Stock""

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

annual meeting of the Company's stockholders financial

"the next annual meeting of the Company's stockholders"

Grant, award, or other acquisition financial

"transaction_code_description": "Grant, award, or other acquisition""

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Vertex (VERX) insider Stefanie Westphal Thompson report on this Form 4?

Stefanie Westphal Thompson reported receiving 15,638 shares of Vertex Class A Common Stock as a restricted stock award. The grant was recorded as an acquisition with no cash price per share and increased her direct holdings to 66,995 shares.

Is the 15,638-share award to Vertex (VERX) director Thompson immediately vested?

No, the 15,638-share award is restricted stock that vests later. It will vest on the earlier of the day immediately before Vertex’s next annual stockholder meeting or June 10, 2027, tying the award to continued board service over time.

How many Vertex (VERX) shares does Stefanie Westphal Thompson hold after this transaction?

After the restricted stock grant, Stefanie Westphal Thompson directly holds 66,995 shares of Vertex Class A Common Stock. This total includes the newly awarded 15,638 restricted shares, which are scheduled to vest based on the timing of the next annual stockholder meeting or June 10, 2027.

Did Stefanie Westphal Thompson buy or sell Vertex (VERX) shares in the market?

She did not buy or sell shares in the open market. The Form 4 reports an acquisition coded as a grant or award, meaning Vertex granted 15,638 restricted shares as compensation, with no purchase price paid and no sale recorded.

What does the vesting condition on Vertex (VERX) restricted stock mean for investors?

The vesting condition means the 15,638 restricted shares become fully owned only over time. Vesting occurs before the next annual stockholder meeting or by June 10, 2027, encouraging ongoing service and aligning the director’s incentives with longer-term company performance and governance continuity.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 06/12/2026 - 04:18 PM Learn about SEC filing dates

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^*

Thompson Stefanie Westphal

(Last) (First) (Middle)

C/O VERTEX, INC.

2301 RENAISSANCE BLVD

(Street)

KING OF PRUSSIA PENNSYLVANIA 19406

(City) (State) (Zip)

UNITED STATES

(Country)

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

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/10/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	06/10/2026		A		15,638(1)	A	$0	66,995	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. Represents an award of restricted stock that will vest on the earlier to occur of (i) the day immediately prior to the date of the next annual meeting of the Company's stockholders, and (ii) June 10, 2027.

	/s/ Lisa Coleman, Attorney-in-Fact	06/12/2026
	** 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.
* Form 4: SEC 1474 (03-26)