16 institutions reported holding $2.5M of THE ONCOLOGY INSTITUTE INC (TOIIW) in SEC 13F filings for 2026-03-31. Largest institutional holders: GROUP ONE TRADING LLC ($924,991), SIMPLEX TRADING, LLC ($858,679), Oasis Management Co Ltd. ($307,000), IMC-Chicago, LLC ($273,844), LMR Partners LLP ($71,006). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GROUP ONE TRADING LLC | $924,991 | 301,300 | Trimmed |
| 2 | SIMPLEX TRADING, LLC | $858,679 | 279,700 | Trimmed |
| 3 | Oasis Management Co Ltd. | $307,000 | 100,000 | Hold |
| 4 | IMC-Chicago, LLC | $273,844 | 89,200 | New |
| 5 | LMR Partners LLP | $71,006 | 1.6M | Hold |
| 6 | DEERFIELD MANAGEMENT COMPANY, L.P. | $54,750 | 1.2M | Hold |
| 7 | Davidson Kempner Capital Management LP | $17,720 | 318,710 | Hold |
| 8 | TORONTO DOMINION BANK | $8,258 | 187,674 | Added |
| 9 | WOLVERINE ASSET MANAGEMENT LLC | $8,122 | 185,437 | Added |
| 10 | Man Group plc | $4,939 | 88,824 | Hold |
| 11 | HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | $4,865 | 87,500 | Hold |
| 12 | DEUTSCHE BANK AG\ | $3,864 | 96,600 | Hold |
| 13 | Alpine Global Management, LLC | $1,391 | 25,024 | Hold |
| 14 | TENOR CAPITAL MANAGEMENT Co., L.P. | $1,095 | 25,000 | Hold |
| 15 | MILLENNIUM MANAGEMENT LLC | $547 | 12,500 | Hold |
| 16 | Clear Street Group Inc. | $273 | 6,228 | Added |
Source: SEC Form 13F filings · as of 2026-03-31