[Form 4] Arq, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Arq, Inc. insider Jeremy Williamson, Chief Operating Officer, reported a routine share disposition tied to tax withholding on vested restricted stock awards. The Form 4 shows a disposition of 2,029 shares on 09/18/2025 at a price of $7 per share, leaving Mr. Williamson with 135,288 shares beneficially owned, held directly. The filing notes the shares were withheld to satisfy tax obligations stemming from RSA vesting. The report was signed 09/19/2025 and does not disclose any other purchases, derivative transactions, or changes in ownership class.

Insights

Financial Analyst

TL;DR: Routine insider withholding to cover taxes; small disposal size relative to holdings, limited investor impact.

The transaction reflects a tax-related share withholding of 2,029 common shares at $7 each following RSA vesting. This is a non-sale disposition for liquidity to meet tax obligations rather than a market-directed sale. Ending direct ownership of 135,288 shares remains intact. For investors, this is a routine administrative event and does not signal a strategic change or material dilution.

Corporate Governance Expert

TL;DR: Filing is a standard Section 16 disclosure of RSA withholding; compliance-focused and not materially negative.

The Form 4 properly discloses the withholding of vested restricted stock on 09/18/2025 and includes a manual signature dated 09/19/2025. The reporting person is the COO and the form is filed individually. There are no indications of related-party transactions, option exercises, or derivative activity. From a governance perspective, the filing demonstrates expected insider reporting and tax compliance.

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
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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^*

Williamson Jeremy

(Last) (First) (Middle)

C/O ARQ, INC.

8051 E. MAPLEWOOD AVE., SUITE 210

(Street)

GREENWOOD VILLAGE CO 80111

(City) (State) (Zip)

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 Operating Officer

3. Date of Earliest Transaction (Month/Day/Year)
09/18/2025

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
Common Stock	09/18/2025		F		2,029(1)	D	$7	135,288	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

Explanation of Responses:

1. Reflects the withholding of shares of the Issuer's common stock to satisfy tax withholding obligations in connection with the vesting of restricted stock awards ("RSAs") on September 18, 2025.

Remarks:

	/s/ Jeremy Williamson	09/19/2025
	** 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).
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.

FAQ

What did ARQ insider Jeremy Williamson report on Form 4?

The filing discloses a withholding disposition of 2,029 common shares on 09/18/2025 at $7 per share to satisfy tax withholding after RSA vesting.

How many ARQ shares does Jeremy Williamson own after the transaction?

Following the reported transaction, Mr. Williamson beneficially owns 135,288 shares, held directly.

Why were the shares disposed of according to the Form 4?

The form states the disposition reflects the withholding of shares to satisfy tax withholding obligations in connection with the vesting of restricted stock awards.

Was this Form 4 filed jointly or by a single reporting person?

The filing was made by one reporting person (Jeremy Williamson) and signed on 09/19/2025.

Does the Form 4 report any derivative transactions or other changes?

No. The Form 4 contains only a non-derivative disposition related to RSA tax withholding and lists no derivative securities or additional transactions.