19 institutions reported holding $5.4M of BUTTERFLY NETWORK INC (BFLY.WS) in SEC 13F filings for 2026-03-31. Largest institutional holders: GROUP ONE TRADING LLC ($2.2M), IMC-Chicago, LLC ($2.1M), SIMPLEX TRADING, LLC ($1.1M), PEAK6 LLC ($0), UBS Group AG ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GROUP ONE TRADING LLC | $2.2M | 556,900 | Trimmed |
| 2 | IMC-Chicago, LLC | $2.1M | 510,500 | Trimmed |
| 3 | SIMPLEX TRADING, LLC | $1.1M | 273,600 | Added |
| 4 | PEAK6 LLC | $0 | 0 | Exited |
| 5 | UBS Group AG | $0 | 0 | Exited |
| 6 | Aequim Alternative Investments LP | $0 | 0 | Exited |
| 7 | D. E. Shaw & Co., Inc. | $0 | 0 | Exited |
| 8 | MILLENNIUM MANAGEMENT LLC | $0 | 0 | Exited |
| 9 | LMR Partners LLP | $0 | 0 | Exited |
| 10 | NewEdge Advisors, LLC | $0 | 0 | Exited |
| 11 | HBW ADVISORY SERVICES LLC | $0 | 0 | Exited |
| 12 | NATIONAL BANK OF CANADA /FI/ | $0 | 0 | Exited |
| 13 | Royal Bank of Canada | $0 | 0 | Exited |
| 14 | DEERFIELD MANAGEMENT COMPANY, L.P. | $0 | 0 | Exited |
| 15 | WOLVERINE ASSET MANAGEMENT LLC | $0 | 0 | Exited |
| 16 | Saba Capital Management, L.P. | $0 | 0 | Exited |
| 17 | HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | $0 | 0 | Exited |
| 18 | WELLS FARGO & COMPANY/MN | $0 | 0 | Exited |
| 19 | GLENVIEW CAPITAL MANAGEMENT, LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31