---
schema_version: "secwatch.filing_event.v1"
accession: "0001709682-25-000038"
form_type: "8-K"
ticker: "CTOS"
cik: "0001709682"
company_name: "Custom Truck One Source, Inc."
filed_at: "2025-10-27T23:59:59+00:00"
generated_at: "2026-05-17T02:12:19.565595+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# CTOS Q3 revenue up 8% to $482M, Adj. EBITDA rises 20% to $96M; reaffirms FY guidance

## Summary
- Total revenue $482.1M (+7.8% YoY); net loss narrowed to $5.8M from $17.4M.
- Adjusted EBITDA $96.0M, up 19.6% YoY; reaffirms 2025 guidance: revenue $1.97B–$2.06B, Adj. EBITDA $370M–$390M.
- ERS rental revenue up 17.7%; avg OEC on rent +16.6% to $1.26B; fleet utilization 79.3% (highest in 2+ years).
- TES revenue up 6% but backlog down 29% to $279.8M; expects lower end of TES guidance range.
- Plans $50M net rental fleet investment; target inventory reduction of $125M-$150M by year-end.

## SEC filing metadata
- accession: 0001709682-25-000038
- form_type: 8-K
- ticker: CTOS
- cik: 0001709682
- company_name: Custom Truck One Source, Inc.
- filed_at: 2025-10-27T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1709682/000170968225000038/0001709682-25-000038-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1709682/000170968225000038/ctos-20251027.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001709682-25-000038
- JSON: https://secwatch.observer/filing/0001709682-25-000038.json
- Plain text: https://secwatch.observer/filing/0001709682-25-000038.txt

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