17 institutions reported holding $3.6M of THE ONCOLOGY INSTITUTE INC (TOIIW) in SEC 13F filings for 2026-06-30. Largest institutional holders: GROUP ONE TRADING LLC ($1.6M), IMC-Chicago, LLC ($762,915), SIMPLEX TRADING, LLC ($583,724), Oasis Management Co Ltd. ($543,000), LMR Partners LLP ($66,294). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GROUP ONE TRADING LLC | $1.6M | 286,800 | Trimmed |
| 2 | IMC-Chicago, LLC | $762,915 | 140,500 | Added |
| 3 | SIMPLEX TRADING, LLC | $583,724 | 107,500 | Trimmed |
| 4 | Oasis Management Co Ltd. | $543,000 | 100,000 | Hold |
| 5 | LMR Partners LLP | $66,294 | 1.6M | Hold |
| 6 | DEERFIELD MANAGEMENT COMPANY, L.P. | $51,000 | 1.2M | Hold |
| 7 | WOLVERINE ASSET MANAGEMENT LLC | $17,063 | 418,214 | Added |
| 8 | Davidson Kempner Capital Management LP | $13,003 | 318,710 | Hold |
| 9 | TORONTO DOMINION BANK | $7,686 | 187,474 | Trimmed |
| 10 | DEUTSCHE BANK AG\ | $3,864 | 96,600 | Hold |
| 11 | Man Group plc | $2,753 | 88,824 | Hold |
| 12 | HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | $2,748 | 87,500 | Hold |
| 13 | Alpine Global Management, LLC | $1,021 | 25,024 | Hold |
| 14 | TENOR CAPITAL MANAGEMENT Co., L.P. | $1,020 | 25,000 | Hold |
| 15 | UBS Group AG | $702 | 17,115 | New |
| 16 | MILLENNIUM MANAGEMENT LLC | $510 | 12,500 | Hold |
| 17 | Clear Street Group Inc. | $246 | 6,028 | Trimmed |
Source: SEC Form 13F filings · as of 2026-06-30