Arq, Inc. — Director's Dealing 2025

Nov 12, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Arq, Inc. (ARQ)
CIK: 0001515156
Period of Report: 2025-11-10

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-11-10	Common Stock	P	50000	$3.7918	Acquired	70718	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	527779	Indirect
Common Stock	480782	Direct

Footnotes

F1: This price is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.73 to $3.86, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this Form 4.

F2: 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.

F3: 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.