Claiborne B. Smith - 23 Mar 2026 Form 4 Insider Report for Arq, Inc. (ARQ)

Reporting relationship: Gen Counsel, Corp Secretary
Issuer ticker: ARQ
Reported as of: 23 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 25 Mar 2026, 08:00:25 UTC
Prior SEC filing: 16 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Claiborne B. Smith

Key filing fact

Claiborne B. Smith filed Form 4 for Arq, Inc. (ARQ) on 25 Mar 2026.

Key facts

This page summarizes Claiborne B. Smith's Form 4 filing for Arq, Inc. (ARQ).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 25 Mar 2026, 08:00.

Change

Previous filing in this sequence was filed on 16 Mar 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002021219 Primary reporting owner

Smith Claiborne Benson

Relationship: Gen Counsel, Corp Secretary
Address: C/O ARQ, INC, 8051 E. MAPLEWOOD AVE, STE 210, GREENWOOD VILLAGE
Signature: /s/ Claiborne B. Smith
Signature date: 25 Mar 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ARQ transaction

Common Stock

Tax liability

Transaction value
Shares: -8,025
Change %: -7.8%
Price: $2.27^*
Shares after: 94,466
Date: 23 Mar 2026
Ownership: Direct
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote 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 March 23, 2026.