---
schema_version: "secwatch.filing_event.v1"
accession: "0001709682-22-000062"
form_type: "8-K"
ticker: "CTOS"
cik: "0001709682"
company_name: "Custom Truck One Source, Inc."
filed_at: "2022-05-10T23:59:59+00:00"
generated_at: "2026-06-25T21:49:08.488629+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# CTOS Q1 revenue $366.5M, Adj. EBITDA $91.5M; maintains full-year outlook

## Summary
- Total revenue $366.5M; gross profit $84.5M (+8.5% vs Q4 2021).
- Net loss of $3.3M, improved from $3.7M in Q4 2021.
- Adjusted EBITDA $91.5M vs $95.6M Q4 2021; pro forma Adj. EBITDA up 25.5% YoY.
- Sales order backlog grew 42.4% to $586.4M; closed HiRail acquisition for ~$51.6M.
- Pro forma rental revenue up 8.9% YoY; fleet utilization 82.5%.

## SEC filing metadata
- accession: 0001709682-22-000062
- form_type: 8-K
- ticker: CTOS
- cik: 0001709682
- company_name: Custom Truck One Source, Inc.
- filed_at: 2022-05-10T23:59:59+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/1709682/000170968222000062/0001709682-22-000062-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1709682/000170968222000062/nsco-20220510.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001709682-22-000062
- JSON: https://secwatch.observer/filing/0001709682-22-000062.json
- Plain text: https://secwatch.observer/filing/0001709682-22-000062.txt

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