---
schema_version: "secwatch.filing_event.v1"
accession: "0001709682-25-000043"
form_type: "8-K"
ticker: "CTOS"
cik: "0001709682"
company_name: "Custom Truck One Source, Inc."
filed_at: "2025-12-23T23:59:59+00:00"
generated_at: "2026-05-16T12:16:13.681764+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.45
calibrated_materiality_score: 0.45
confidence: "high"
source: SEC EDGAR
---

# Custom Truck One Source CAO R. Todd Barrett resigns, effective Jan. 16, 2026

## Summary
- Chief Accounting Officer R. Todd Barrett resigns effective January 16, 2026.
- Resignation is not due to any disagreement with the company on operations, policies, or practices.
- No successor has been announced as of the filing date.

## SEC filing metadata
- accession: 0001709682-25-000043
- form_type: 8-K
- ticker: CTOS
- cik: 0001709682
- company_name: Custom Truck One Source, Inc.
- filed_at: 2025-12-23T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.45
- calibrated_materiality_score: 0.45
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1709682/000170968225000043/0001709682-25-000043-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1709682/000170968225000043/ctos-20251219.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001709682-25-000043
- JSON: https://secwatch.observer/filing/0001709682-25-000043.json
- Plain text: https://secwatch.observer/filing/0001709682-25-000043.txt

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