Tensile Capital Management SC 13G/A Vertex / Tensile Capital Management ownership change

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

(Rule 13d-102)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT

TO RULES 13d-1(b),(c) AND (d) AND AMENDMENTS THERETO FILED

PURSUANT TO RULE 13d-2

(Amendment No. 3)*

VERTEX, INC.

(Name of Issuer)

Class A Common Stock

(Title of Class of Securities)

92538J106

(CUSIP Number)

September 30, 2024

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this schedule is filed:

☒ Rule 13d-1(b)

☐ Rule 13d-1(c)

☐ Rule 13d-1(d)

* The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page. The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act.

1	NAMES OF REPORTING PERSONS  Arthur C. Young
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP  (a) ☐  (b) ☒
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION  United States

NUMBER OF SHARES  BENEFICIALLY  OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER  0
	6	SHARED VOTING POWER  4,053,550
	7	SOLE DISPOSITIVE POWER  0
	8	SHARED DISPOSITIVE POWER  4,053,550

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON  4,053,550
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)  ☐
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)  6.14%
12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)  IN

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1	NAMES OF REPORTING PERSONS  Douglas J. Dossey
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP  (a) ☐  (b) ☒
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION  United States

NUMBER OF SHARES  BENEFICIALLY  OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER  0
	6	SHARED VOTING POWER  4,053,550
	7	SOLE DISPOSITIVE POWER  0
	8	SHARED DISPOSITIVE POWER  4,053,550

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON  4,053,550
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)  ☐
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)  6.14%
12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)  IN

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1	NAMES OF REPORTING PERSONS  Tensile Capital Management LP
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP  (a) ☐  (b) ☒
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION  Delaware

NUMBER OF SHARES  BENEFICIALLY  OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER  0
	6	SHARED VOTING POWER  4,053,550
	7	SOLE DISPOSITIVE POWER  0
	8	SHARED DISPOSITIVE POWER  4,053,550

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON  4,053,550
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)  ☐
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)  6.14%
12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)  IA, OO

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1	NAMES OF REPORTING PERSONS  Tensile Capital Management GP LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP  (a) ☐  (b) ☒
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION  Delaware

NUMBER OF SHARES  BENEFICIALLY  OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER  0
	6	SHARED VOTING POWER  4,053,550
	7	SOLE DISPOSITIVE POWER  0
	8	SHARED DISPOSITIVE POWER  4,053,550

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON  4,053,550
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)  ☐
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)  6.14%
12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)   OO

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1	NAMES OF REPORTING PERSONS  Tensile Capital GP LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP  (a) ☐  (b) ☒
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION  Delaware

NUMBER OF SHARES  BENEFICIALLY  OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER  0
	6	SHARED VOTING POWER  4,053,550
	7	SOLE DISPOSITIVE POWER  0*
	8	SHARED DISPOSITIVE POWER  4,053,550

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON  4,053,550
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)  ☐
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)  6.14%
12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)   PN

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1	NAMES OF REPORTING PERSONS  Tensile Capital Partners Master Fund LP
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP  (a) ☐  (b) ☒
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION  Cayman Islands

NUMBER OF SHARES  BENEFICIALLY  OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER  0
	6	SHARED VOTING POWER  4,053,550
	7	SOLE DISPOSITIVE POWER  0*
	8	SHARED DISPOSITIVE POWER  4,053,550

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON  4,053,550
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)  ☐
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)  6.14%
12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)   PN

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SCHEDULE 13G

Item 1(a). Name of Issuer

Vertex, Inc.

Item 1(b). Address of Issuer’s Principal Executive Offices

2301 Renaissance Boulevard

King of Prussia, PA 19406

Item 2(a). Name of Person Filing

Arthur C. Young

Douglas J. Dossey

Tensile Capital Management LP

Tensile Capital Management GP LLC

Tensile Capital GP LLC

Tensile Capital Partners Master Fund LP

Item 2(b). Address of Principal Business Office

700 Larkspur Landing Circle, Suite 255

Larkspur, CA 94939

Item 2(c). Citizenship

United States, Delaware

Item 2(d). Title of Class of Securities

Class A Common Stock

Item 2(e). CUSIP Number

92538J106

Item 3. If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:

(a)	☐	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).
(b)	☐	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 73c).
(c)	☐	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).
(d)	☐	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).
(e)	☒	An investment adviser in accordance with §13d-1(b)(1)(ii)(E).
(f)	☐	An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F).
(g)	☐	A parent holding company or control person in accordance with §240.13d-1(b)(1)(ii)(G).
(h)	☐	A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813).
(i)	☐	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3).
(j)	☐	A non-U.S. institution, in accordance with §240.13d-1(b)(1)(ii)(J).
(k)	☐	Group, in accordance with §240.13d-1(b)(1)(ii)(K). If filing as a non-U.S. institution in accordance with §240.13d-1(b)(1)(ii)(J), please specify the type of institution:

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Item 4. Ownership

The information requested by this paragraph is incorporated herein by reference to the cover page to this Schedule 13G.

Item 5. Ownership of Five Percent or Less of a Class

Not Applicable.

Item 6. Ownership of More than Five Percent on Behalf of Another Person

Not Applicable.

Item 7. Identification and Classification of the Subsidiary which Acquired the Security Being Reported on by the Parent Holding Company:

Not Applicable.

Item 8. Identification and Classification of Members of the Group

Not Applicable.

Item 9. Notice of Dissolution of Group

Not Applicable.

Item 10. Certification

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

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SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, the undersigned certify that the information set forth in this statement is true, complete and correct.

Dated: November 14, 2024

Arthur C. Young

Douglas J. Dossey

Tensile Capital Management LP

Tensile Capital Management GP LLC

Tensile Capital GP LLC

Tensile Capital Partners Master Fund LP

By: /s/ Arthur C. Young

Arthur C. Young, for (i) himself, (ii) as

Managing Partner of Tensile Capital Management LP, for itself, (iii) as Manager of Tensile Capital

Management GP LLC, for itself, (iv) as Manager of Tensile Capital GP LLC, for itself and as General Partner of Tensile Capital Partners

Master Fund LP

By:	/s/ Douglas J. Dossey
Douglas J. Dossey, for himself

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