Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 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 that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * Steinmetz Shimon 2. Issuer Name and Ticker or Trading Symbol Arq, Inc. [ARQ] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chief Financial Officer (Last) (First) (Middle) 8051 E. MAPLEWOOD AVE., STE. 210 3. Date of Earliest Transaction (Month/Day/Year) 07/31/2026 (Street) GREENWOOD VILLAGE, CO 80111 4. If Amendment, Date 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 (City) (State) (Zip) 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 Common Stock 07/31/2026 A 250,000(1) A $ 0 250,000 D Common Stock 08/01/2026 A 93,023(2) A $ 0 343,023 D

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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 Underlying Securities (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 of Derivative Security: 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

Performance Share Units

(3)

07/31/2026

A

150,000

(4)

(4)

Common Stock

150,000

$ 0

150,000

D

Performance Share Units

(5)

08/01/2026

A

93,023

(6)

03/15/2029(6)

Common Stock

186,046(7)

$ 0

93,023

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Steinmetz Shimon 8051 E. MAPLEWOOD AVE. STE. 210 GREENWOOD VILLAGE, CO 80111			Chief Financial Officer

Signatures

/s/ Shimon Steinmetz		08/04/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	Represents restricted stock awards ("RSAs") granted to Mr. Steinmetz as an employment inducement award. 75,000 RSAs shall vest on the second anniversary of the grant date and the remaining 175,000 RSAs shall vest on the third anniversary of the grant date.
(2)	Represents RSAs granted in accordance with the Issuer's long-term incentive plan under the 2026 Omnibus Incentive Plan, approved by stockholders on June 10, 2026. The RSAs shall vest in three equal installments, on each of August 1, 2027, March 23, 2028, and March 23, 2029.
(3)	Represents performance share units ("PSUs") granted to Mr. Steinmetz as an employment inducement award. Each PSU represents the right to receive one share of the Issuer's Common Stock upon vesting and settlement.
(4)	50,000 PSUs vest when the 30-day volume weighted average price of the Issuer's Common Stock (the "30-Day VWAP") equals $8.00 per share, 50,000 PSUs vest when the 30-Day VWAP equals $10.00 per share, and 50,000 PSUs vest when the 30-Day VWAP equals $15.00 per share, in each case, prior to the third anniversary of the date of grant.
(5)	Represents PSUs granted in accordance with the Issuer's long-term incentive plan under the 2026 Omnibus Incentive Plan.
(6)	Each PSU represents a contingent right to receive one share of the Issuer's common stock upon vesting of the PSU, which will occur, if at all, no later than March 15, 2029 subject to the reporting person's continuous service with the Issuer or its related entities and the achievement of certain pre-established goals to be measured as of December 31, 2028.
(7)	Represents the maximum number of PSUs that will vest, if at all, which is 200% of the target award.

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