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).

1. Name and Address of Reporting Person* Rowland Bryan T.R. (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 10% Owner X Officer (give title below) Other (specify below) GENERAL COUNSEL
	3. Date of Earliest Transaction (Month/Day/Year) 03/01/2021
	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	03/17/2021		M		62,196	A	$3.734	64,828	D
Class A Common Stock	03/17/2021		F		26,485	D	$25.67	38,343	D
Class A Common Stock	03/17/2021		M		62,430	A	$3.167	100,773	D
Class A Common Stock	03/17/2021		F		30,951	D	$25.67	70,292(1)	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
Stock Option	$3.734	03/17/2021		M			62,196	(2)	02/07/2029	Class A Common Stock	62,196	$0	62,196	D
Stock Option	$3.167	03/17/2021		M			62,430	(3)	02/09/2028	Class A Common Stock	62,430	$0	62,433	D
Stock Option	$32.16	03/01/2021		A		4,027		(4)	03/01/2031	Class A Common Stock	4,027	$0	4,027	D
Restricted Stock Units	(5)	03/01/2021		A		3,465		(6)	(6)	Class A Common Stock	3,465	$0	3,465	D

Explanation of Responses:

1. Includes 53 shares of restricted stock that were inadvertently omitted from filer's Form 3 and 417 shares acquired through the Company's Employee Stock Purchase Plan. The amount reported in column 5 reflects the number of shares of Class A Common Stock beneficially owned as of the date hereof.

2. This option became exercisable with respect to 50% of the shares on February 7, 2021, and will vest with respect to the remaining shares on February 7, 2024.

3. This option became exercisable as to 50% of the shares on the date of grant and will vest with respect to the remaining shares on February 9, 2023.

4. This option will vest and become exercisable with respect to 25% of the shares on each of March 1, 2022, March 1, 2023, March 1, 2024 and March 1, 2025.

5. Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock.

6. Represents an award of restricted stock units that will vest as to 50% of the amount of shares on March 1, 2023, and 25% of the shares on each of March 1, 2024 and March 1, 2025.

	/s/ Lisa Coleman, Attorney-in-Fact	11/12/2021
	** 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).
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