3.40M-share exit filing lowers Vertex (VERX) stake below 5% — amendment

Rhea-AI Filing Summary

Vertex, Inc. Schedule 13G/A Amendment No. 5: The filing states that the reporting persons collectively beneficially own 3,398,563 shares of Class A Common Stock, representing 4.37% of the class as shown with a 03/31/2026 date. The amendment is described as an exit filing because the reporting persons no longer beneficially own more than five percent of the outstanding shares. The filing lists the reporting parties (Arthur C. Young; Douglas J. Dossey; Tensile Capital Management entities and related funds) and provides signatures dated 04/02/2026.

Insights

Investor Relations / Governance Analyst

Exit filing shows holdings fell below 5% threshold.

The schedule amendment records a 3,398,563-share position equal to 4.37% of Class A common stock, with the cover date 03/31/2026. The statement explicitly calls this an "exit filing," indicating the reporting persons’ disclosed beneficial ownership is now below the five percent reporting threshold.

Cash‑flow treatment or the transaction path that reduced ownership is not detailed in the excerpt; subsequent filings may describe how the position was reduced if material.

Key Figures

Shares beneficially owned: 3,398,563 shares Percent of class: 4.37% Amendment/signature date: 04/02/2026

3 metrics

Shares beneficially owned 3,398,563 shares Class A Common Stock as shown with 03/31/2026

Percent of class 4.37% Percentage of Class A shares reported in Amendment No.5

Amendment/signature date 04/02/2026 Signatures executing the Schedule 13G/A Amendment No.5

Key Terms

Amendment No. 5, exit filing, beneficially own

3 terms

Amendment No. 5 regulatory

"This Amendment No. 5 constitutes an exit filing for the Reporting Persons"

exit filing regulatory

"constitutes an exit filing for the Reporting Persons"

beneficially own financial

"no longer beneficially own more than five percent of the outstanding shares"

Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 5)

Vertex, Inc.

(Name of Issuer)

Class A Common Stock

(Title of Class of Securities)

92538J106

(CUSIP Number)

03/31/2026

(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)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 92538J106

1

Names of Reporting Persons

Arthur C. Young

2

Check the appropriate box if a member of a Group (see instructions)

(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 0.00
6	Shared Voting Power 3,398,563.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 3,398,563.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,398,563.00

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)

4.37 %

12

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person: This Amendment No. 5 constitutes an exit filing for the Reporting Persons (as defined below), as the Reporting Persons no longer beneficially own more than five percent of the outstanding shares of the Issuer.

SCHEDULE 13G

CUSIP Number(s): 92538J106

1

Names of Reporting Persons

Douglas J. Dossey

2

Check the appropriate box if a member of a Group (see instructions)

(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 0.00
6	Shared Voting Power 3,398,563.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 3,398,563.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,398,563.00

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)

4.37 %

12

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person: This Amendment No. 5 constitutes an exit filing for the Reporting Persons (as defined below), as the Reporting Persons no longer beneficially own more than five percent of the outstanding shares of the Issuer.

SCHEDULE 13G

CUSIP Number(s): 92538J106

1

Names of Reporting Persons

Tensile Capital Management LP

2

Check the appropriate box if a member of a Group (see instructions)

(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 0.00
6	Shared Voting Power 3,398,563.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 3,398,563.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,398,563.00

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)

4.37 %

12

Type of Reporting Person (See Instructions)

IA, OO

Comment for Type of Reporting Person: This Amendment No. 5 constitutes an exit filing for the Reporting Persons (as defined below), as the Reporting Persons no longer beneficially own more than five percent of the outstanding shares of the Issuer.

SCHEDULE 13G

CUSIP Number(s): 92538J106

1

Names of Reporting Persons

Tensile Capital Management GP LLC

2

Check the appropriate box if a member of a Group (see instructions)

(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 0.00
6	Shared Voting Power 3,398,563.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 3,398,563.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,398,563.00

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)

4.37 %

12

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person: This Amendment No. 5 constitutes an exit filing for the Reporting Persons (as defined below), as the Reporting Persons no longer beneficially own more than five percent of the outstanding shares of the Issuer.

SCHEDULE 13G

CUSIP Number(s): 92538J106

1

Names of Reporting Persons

Tensile Capital GP LLC

2

Check the appropriate box if a member of a Group (see instructions)

(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 0.00
6	Shared Voting Power 3,398,563.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 3,398,563.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,398,563.00

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)

4.37 %

12

Type of Reporting Person (See Instructions)

PN

Comment for Type of Reporting Person: This Amendment No. 5 constitutes an exit filing for the Reporting Persons (as defined below), as the Reporting Persons no longer beneficially own more than five percent of the outstanding shares of the Issuer.

SCHEDULE 13G

CUSIP Number(s): 92538J106

1

Names of Reporting Persons

Tensile Capital Partners Master Fund LP

2

Check the appropriate box if a member of a Group (see instructions)

(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 0.00
6	Shared Voting Power 3,398,563.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 3,398,563.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,398,563.00

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)

4.37 %

12

Type of Reporting Person (See Instructions)

PN

Comment for Type of Reporting Person: This Amendment No. 5 constitutes an exit filing for the Reporting Persons (as defined below), as the Reporting Persons no longer beneficially own more than five percent of the outstanding shares of the Issuer.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Vertex, Inc.
(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
(b)	Address or principal business office or, if none, residence: 700 Larkspur Landing Circle, Suite 255, Larkspur, CA 94939
(c)	Citizenship: United States, Delaware
(d)	Title of class of securities: Class A Common Stock
(e)	CUSIP No.:
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. 78c);
(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 § 240.13d-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 associations 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). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: The information requested by this paragraph is incorporated herein by reference to the cover page to this Schedule 13G.
(b)	Percent of class: See above.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: See above.
	(ii) Shared power to vote or to direct the vote: See above.
	(iii) Sole power to dispose or to direct the disposition of: See above.
	(iv) Shared power to dispose or to direct the disposition of: See above.
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 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 or Control Person.
	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.

Certifications:

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.

SIGNATURE

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

Arthur C. Young

Signature:	/s/ Arthur C. Young
Name/Title:	Arthur C. Young
Date:	04/02/2026

Douglas J. Dossey

Signature:	/s/ Douglas J. Dossey
Name/Title:	Douglas J. Dossey
Date:	04/02/2026

Tensile Capital Management LP

Signature:	/s/ Arthur C. Young
Name/Title:	Managing Partner
Date:	04/02/2026

Tensile Capital Management GP LLC

Signature:	/s/ Arthur C. Young
Name/Title:	Manager
Date:	04/02/2026

Tensile Capital GP LLC

Signature:	/s/ Arthur C. Young
Name/Title:	Manager
Date:	04/02/2026

Tensile Capital Partners Master Fund LP

Signature:	/s/ Arthur C. Young
Name/Title:	General Partner
Date:	04/02/2026

FAQ

What does Vertex (VERX) Amendment No. 5 say about ownership?

The amendment reports 3,398,563 shares held collectively, equal to 4.37% of Class A common stock as shown with a 03/31/2026 date. It states this is an exit filing because ownership fell below five percent.

Who are the reporting persons on the VERX Schedule 13G/A?

The filing names Arthur C. Young, Douglas J. Dossey, and Tensile Capital entities including Tensile Capital Management LP, GP entities, and Tensile Capital Partners Master Fund, with the principal office in Larkspur, CA.

Does the filing explain how the VERX stake was reduced below 5%?

No transactional detail is provided in the excerpt. The amendment characterizes itself as an exit filing but does not state sales, transfers, or other mechanisms that reduced the position.

What date and signatures appear on the VERX amendment?

The cover shows 03/31/2026 and the amendment includes signatures for Arthur C. Young and Douglas J. Dossey dated 04/02/2026, with titles for the various Tensile Capital entities.