# Custom Truck One Source, Inc.: Form SCHEDULE 13D/A, filed Oct 21, 2025

- Company: [Custom Truck One Source, Inc.](/companies/ctos.md) (CIK 1709682)
- Form: SCHEDULE 13D/A
- Filed: 2025-10-21
- Accepted by EDGAR: Oct 21, 2025, 16:30 ET
- Period: not reported
- Accession: 0001213900-25-100831
- Inline XBRL: no
- Main document: https://www.sec.gov/Archives/edgar/data/1709682/000121390025100831/xslSCHEDULE_13D_X01/primary_doc.xml
- All documents and exhibits: https://www.sec.gov/Archives/edgar/data/1709682/000121390025100831/

## Sections

Sections are extracted only from 10-K and 10-Q reports. Read this filing’s documents on sec.gov. https://www.sec.gov/Archives/edgar/data/1709682/000121390025100831/xslSCHEDULE_13D_X01/primary_doc.xml

Filed Oct 21, 2025.
Source: SEC EDGAR, the filing index for accession 0001213900-25-100831. Last ingested by Listed: Oct 26, 2026, 16:16 ET. No prices; not investment advice.