3 institutions reported holding $1.5M of BLUE BIRD CORP (BLBDW) in SEC 13F filings for 2026-03-31. Largest institutional holders: IMC-Chicago, LLC ($1.1M), GROUP ONE TRADING LLC ($289,629), SIMPLEX TRADING, LLC ($124,938). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $1.1M | 19,300 | Trimmed |
| 2 | GROUP ONE TRADING LLC | $289,629 | 5,100 | Added |
| 3 | SIMPLEX TRADING, LLC | $124,938 | 2,200 | Added |
Source: SEC Form 13F filings · as of 2026-03-31