Arq, Inc. — Director's Dealing 2026

Mar 3, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Arq, Inc. (ARQ)
CIK: 0001515156
Period of Report: 2026-02-27

Reporting Person: Smith Claiborne Benson (Gen Counsel, Corp Secretary)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-27	Common Stock	M	28229	—	Acquired	110667	Direct
2026-02-27	Common Stock	F	10176	$3.51	Disposed	100491	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-02-27	Performance Share Units	$	M	21179	Disposed	2026-03-10	Common Stock (42358)	Direct

Footnotes

F1: On February 27, 2026, the Compensation Committee of the Board of Directors of the Issuer determined that of the 21,179 performance share units ("PSUs") awarded to the reporting person on March 23, 2023 pursuant to the 2023 Long Term Incentive Plan under the Issuer's 2022 Omnibus Equity Incentive Plan, 28,229 PSUs vested based on the achievement of specific performance criteria over a three year performance period ended December 31, 2025. Each vested PSU represented the right to receive one share of the Issuer's common stock.

F2: Reflects the withholding of shares of the Issuer's common stock to satisfy tax withholding obligations in connection with the vesting of PSUs on February 27, 2026.

F3: Represents the maximum number of PSUs that were eligible to vest, which was 200% of the target award.