Arq exec shares withheld for RSA tax

Arq, Inc. reported that General Counsel and Corporate Secretary Smith Claiborne Benson had 8,025 shares of common stock withheld on March 23, 2026 to cover tax obligations tied to vesting restricted stock awards.

Rhea-AI Filing Summary

Arq, Inc. reported that General Counsel and Corporate Secretary Smith Claiborne Benson had 8,025 shares of common stock withheld on March 23, 2026 to cover tax obligations tied to vesting restricted stock awards. This was a tax-withholding disposition rather than an open-market sale. Following the withholding, Benson directly holds 94,466 shares of Arq common stock.

Insider Trade Summary

Exercise Price or Tax Liability: 8,025 shares

Exercise Price or Tax Liability 1 txn

Insider Smith Claiborne Benson

Role Gen Counsel, Corp Secretary

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	8,025	$2.27	$18K

Holdings After Transaction: Common Stock — 94,466 shares (Direct)

Footnotes (1)

1. F1. 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 March 23, 2026.

FAQ

What insider transaction did Arq (ARQ) report for Smith Claiborne Benson?

Arq reported a tax-related share withholding for General Counsel Smith Claiborne Benson. On March 23, 2026, 8,025 common shares were withheld to satisfy tax obligations from vesting restricted stock awards, leaving him with 94,466 directly held shares afterward.

Was the Arq (ARQ) Form 4 transaction an open-market sale of shares?

No, the Form 4 transaction was not an open-market sale. It reflects 8,025 Arq common shares withheld to cover tax liabilities on vesting restricted stock awards, a routine administrative disposition rather than a discretionary sale into the market.

How many Arq (ARQ) shares does Smith Claiborne Benson hold after the Form 4 event?

After the tax-withholding disposition, Smith Claiborne Benson directly holds 94,466 shares of Arq common stock. The Form 4 shows these shares as his direct ownership position following the March 23, 2026 restricted stock vesting and related tax withholding.

What does the tax-withholding code F mean in the Arq (ARQ) Form 4 filing?

Code F in the Form 4 indicates shares were used to pay tax obligations or exercise costs. For Arq, it shows 8,025 shares were withheld from Smith Claiborne Benson’s vesting restricted stock awards on March 23, 2026 to satisfy required tax withholding.

Which Arq (ARQ) executive is involved in this Form 4 tax-withholding transaction?

The transaction involves Smith Claiborne Benson, Arq’s General Counsel and Corporate Secretary. His Form 4 reports 8,025 common shares withheld for taxes upon vesting of restricted stock awards, with 94,466 Arq shares remaining in his direct ownership afterward.

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Accepted by SEC EDGAR 03/25/2026 - 08:00 AM Learn about SEC filing dates

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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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).

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^*

Smith Claiborne Benson

(Last) (First) (Middle)

C/O ARQ, INC

8051 E. MAPLEWOOD AVE, STE 210

(Street)

GREENWOOD VILLAGE COLORADO 80111

(City) (State) (Zip)

UNITED STATES

(Country)

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)
	Gen Counsel, Corp Secretary

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/23/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	03/23/2026		F		8,025(1)	D	$2.27	94,466	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 March 23, 2026.

Remarks:

	/s/ Claiborne B. Smith	03/25/2026
	** 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.
* Form 4: SEC 1474 (03-26)