8051 E. MAPLEWOOD AVE., STE 210, GREENWOOD VILLAGE, CO
Stacia Hansen Resigns as Chief Accounting Officer; Separation Agreement Executed
Appointment of Peter Owino as Interim Chief Accounting Officer
Approval of 2026 Omnibus Incentive Plan at Arq, Inc. Annual Meeting
Strengthens Executive Team with Appointment of Shimon Steinmetz as Chief Financial Officer
Reports First Quarter 2026 Results
Executive Departures - Jeremy Williamson and Jay Voncannon Leave Arq, Inc.
Annual Report to Security Holders
Ninth Amendment to Tax Asset Protection Plan Executed by Arq, Inc.
Q1
FY 2025
Q3
Q2
FY 2024
Amended Registration of Securities
Prospectus filed pursuant to Rule 424(b)(5)
Effectiveness Notice
Registration Statement for Securities Offered under a Shelf Registration
Registration Statement for Securities to be Offered to Employees
Prospectus filed pursuant to Rule 424(b)(3)
Definitive Proxy Statement
Additional Proxy Materials
PRE 14A
Statement of Changes in Beneficial Ownership
Initial Statement of Beneficial Ownership
Amended Schedule 13G - Ownership Report
Correspondence
Submission Upload
S-8 POS