Arq, Inc. — Director's Dealing 2025

Mar 25, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Arq, Inc. (ARQ)
CIK: 0001515156
Period of Report: 2025-03-23

Reporting Person: Rasmus Robert E. (Director, Chief Executive Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-03-23	Common Stock	A	4990	—	Acquired	455782	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-03-23	Performance Share Units	$	A	4990	Acquired	2028-03-10	Common Stock (9980)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	527779	Indirect

Footnotes

F1: Represents restricted stock awards granted in accordance with the Issuer's long-term incentive plan under the 2024 Omnibus Incentive Plan, as approved by stockholders on June 10, 2024. The restricted stock awards shall vest in three equal annual installments, beginning on the first anniversary of the grant date.

F2: The shares of Common Stock reported on this row are held by RER Legacy Investments II LLC ("RER Legacy"). Mr. Rasmus is the ultimate control person of RER Legacy, and an indirect beneficial owner of these shares. Mr. Rasmus disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

F3: Each Performance Share Unit ("PSU") represents a contingent right to receive one share of the Company's common stock upon vesting of the PSU, which will occur, if at all, no later than March 10, 2028 subject to the reporting person's continuous service with the Company or its related entities and the achievement of certain pre-established goals to be measured as of December 31, 2027.

F4: Represents the maximum number of PSUs that will vest, if at all, which is 200% of the target award.