3 institutions reported holding $21.6M of HARROW INC (HROWL) in SEC 13F filings for 2026-03-31. Largest institutional holders: IMC-Chicago, LLC ($11.6M), GROUP ONE TRADING LLC ($8.2M), SIMPLEX TRADING, LLC ($1.8M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $11.6M | 328,900 | Added |
| 2 | GROUP ONE TRADING LLC | $8.2M | 232,800 | Trimmed |
| 3 | SIMPLEX TRADING, LLC | $1.8M | 50,700 | Trimmed |
Source: SEC Form 13F filings · as of 2026-03-31