# EDGAR Filing Document

**Accession Number:** 0001806837
**File Stem:** 0001104659-25-058504
**Filing Date:** 2025-6
**Character Count:** 9151
**Document Hash:** feb83e2eea772f9d7eff2f254752f00e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-25-058504.hdr.sgml**: 20250611

**ACCESSION NUMBER**: 0001104659-25-058504

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250609

**FILED AS OF DATE**: 20250611

**DATE AS OF CHANGE**: 20250611

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Westphal Jeffrey
- **CENTRAL INDEX KEY:** 0001818851

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39413
- **FILM NUMBER:** 251039770

**MAIL ADDRESS:**
- **STREET 1:** C/O VERTEX, INC.
- **STREET 2:** 2301 RENAISSANCE BLVD.
- **CITY:** KING OF PRUSSIA
- **STATE:** PA
- **ZIP:** 19406

**FORMER NAME:**
- **FORMER CONFORMED NAME:** Westphal Jeffery
- **DATE OF NAME CHANGE:** 20200721
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Vertex, Inc.
- **CENTRAL INDEX KEY:** 0001806837
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-PREPACKAGED SOFTWARE [7372]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 232081753
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 2301 RENAISSANCE BOULEVARD
- **CITY:** KING OF PRUSSIA
- **STATE:** PA
- **ZIP:** 19406
- **BUSINESS PHONE:** (800) 355-3500

**MAIL ADDRESS:**
- **STREET 1:** 2301 RENAISSANCE BOULEVARD
- **CITY:** KING OF PRUSSIA
- **STATE:** PA
- **ZIP:** 19406

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] 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**<sup>*</sup><br>Westphal Jeffrey<br><sub>(Last) (First) (Middle)</sub><br>C/O VERTEX, INC.<br>2301 RENAISSANCE BLVD<br><sub>(Street)</sub><br>KING OF PRUSSIA, PA 19406<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-06-09 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [ ] 10% Owner<br>[ ] Officer (give title below) [X] Other (specify below)<br>_See Remarks_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Vertex, Inc. [ VERX ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Class A Common Stock | 2025-06-09 |  | C |  | 1514000 | A | $0 | 1514000 | I | By The 2009 Jeffrey R. Westphal Generation Skipping Trust |
| Class A Common Stock | 2025-06-09 |  | S |  | 1514000 | D | 38.45<sup>(2)</sup> | 0 | I | By The 2009 Jeffrey R. Westphal Generation Skipping Trust |
| Class A Common Stock | 2025-06-09 |  | C |  | 1153756 | A | $0 | 1153756 | I | By Rainer J. Westphal 2007 Separate Exempt Trust FBO Jeffrey Westphal |
| Class A Common Stock | 2025-06-09 |  | S |  | 1153756 | D | 38.45<sup>(2)</sup> | 0 | I | By Rainer J. Westphal 2007 Separate Exempt Trust FBO Jeffrey Westphal |
| Class A Common Stock | 2025-06-09 |  | C |  | 332244 | A | $0 | 332244 | I | By Rainer J. Westphal 2007 Separate Non-Exempt Trust FBO Jeffrey Westphal |
| Class A Common Stock | 2025-06-09 |  | S |  | 332244 | D | 38.45<sup>(2)</sup> | 0 | I | By Rainer J. Westphal 2007 Separate Non-Exempt Trust FBO Jeffrey Westphal |
| Class A Common Stock |  |  |  |  |  |  |  | 7895 | D |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Class B Common Stock | <sup>(1)</sup> | 2025-06-09 |  | C |  |  | 1514000 | <sup>(1)</sup> | <sup>(1)</sup> | Class A Common Stock | 1514000 | $0 | 1125927 | I | By The 2009 Jeffrey R. Westphal Generation Skipping Trust |
| Class B Common Stock | <sup>(1)</sup> |  |  |  |  |  |  | <sup>(1)</sup> | <sup>(1)</sup> | Class A Common Stock | 388000 |  | 388000 | D |  |
| Class B Common Stock | <sup>(1)</sup> | 2025-06-09 |  | C |  |  | 1153756 | <sup>(1)</sup> | <sup>(1)</sup> | Class A Common Stock | 1153756 | $0 | 0 | I | By Rainer J. Westphal 2007 Separate Exempt Trust FBO Jeffrey Westphal |
| Class B Common Stock | <sup>(1)</sup> | 2025-06-09 |  | C |  |  | 332244 | <sup>(1)</sup> | <sup>(1)</sup> | Class A Common Stock | 332244 | $0 | 0 | I | By Rainer J. Westphal 2007 Separate Non-Exempt Trust FBO Jeffrey Westphal |

---

### Footnotes:

(1) 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.

(2) 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.

**Signature:** /s/ Anton Pamer, Attorney-in-Fact  
**Date:** 2025-06-11

### Remarks:

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.**