---
schema_version: "secwatch.filing_event.v1"
accession: "0001515156-26-000057"
form_type: "8-K"
ticker: "ARQ"
cik: "0001515156"
company_name: "Arq, Inc."
filed_at: "2026-05-01T23:59:59+00:00"
generated_at: "2026-05-15T00:17:49.392408+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Arq finalizes separation agreements with former COO and CFO, including cash severance and equity acceleration

## Summary
- COO Williamson receives 12 months' base salary (~$361,500), COBRA lump-sum, accelerated vesting of 34,270 restricted stock and 49,736 PSUs.
- CFO Voncannon gets accelerated vesting of 50,000 restricted shares; no additional cash severance beyond statutory COBRA.
- Both departures effective April 18, 2026; separation agreements became effective April 29, 2026 after revocation period.

## SEC filing metadata
- accession: 0001515156-26-000057
- form_type: 8-K
- ticker: ARQ
- cik: 0001515156
- company_name: Arq, Inc.
- filed_at: 2026-05-01T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1515156/000151515626000057/0001515156-26-000057-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1515156/000151515626000057/ades-20260429.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001515156-26-000057
- JSON: https://secwatch.observer/filing/0001515156-26-000057.json
- Plain text: https://secwatch.observer/filing/0001515156-26-000057.txt

## Key facts
- Executive change
  Jay Voncannon departed as Chief Financial Officer at Arq, Inc..
  - Action: ceased serving and terminated
  - Role: Chief Financial Officer
  source text: Jeremy “Deke” Williamson ceased serving as the Chief Operating Officer and Jay Voncannon ceased serving as Chief Financial Officer of Arq, Inc.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1515156/000151515626000057/0001515156-26-000057-index.htm
- Executive change
  Jeremy "Deke" Williamson departed as Chief Operating Officer at Arq, Inc..
  - Action: ceased serving and terminated
  - Role: Chief Operating Officer
  source text: Jeremy “Deke” Williamson ceased serving as the Chief Operating Officer and Jay Voncannon ceased serving as Chief Financial Officer of Arq, Inc.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1515156/000151515626000057/0001515156-26-000057-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.