Arq, Inc. — Director's Dealing 2025

May 28, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Arq, Inc. (ARQ)
CIK: 0001515156
Period of Report: 2025-05-23

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-05-23	Common Stock	P	25000	$4.10	Acquired	480782	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	527779	Indirect
Common Stock	20718	Indirect

Footnotes

F1: The reported transaction represents a privately negotiated purchase of 25,000 shares of common stock of the Issuer from another non-affiliated holder of the Issuer's common stock at the negotiated price of $4.10 per share.

F2: The shares of Common Stock reported on this row are held by RER Legacy Investments II LLC ("RER Legacy"). Mr. Rasmus, the Chief Executive Officer and a Director of the Issuer, 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: The shares of Common Stock reported on this row are held by RER Investments LLC ("RER Investments"). Mr. Rasmus, the Chief Executive Officer and a Director of the Issuer, is the ultimate control person of RER Investments, 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.