1 institutions reported holding $3,285 of CUSTOM TRUCK ONE SOURCE INC (CTOSW) in SEC 13F filings for 2026-03-31. Largest institutional holders: SIMPLEX TRADING, LLC ($3,285). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SIMPLEX TRADING, LLC | $3,285 | 500 | Trimmed |
Source: SEC Form 13F filings · as of 2026-03-31