| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Williamson Jeremy | Chief Operating Officer | C/O ARQ, INC., 8051 E. MAPLEWOOD AVE., SUITE 210, GREENWOOD VILLAGE | /s/ Jeremy Williamson | 19 Sep 2025 | 0001993283 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | ARQ | Common Stock | Tax liability | $14,203 | -2,029 | -1.5% | $7.00 | 135,288 | 18 Sep 2025 | Direct | F1 |
| Id | Content |
|---|---|
| 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 September 18, 2025. |