8 institutions reported holding $121.7M of FLAGSTAR BAN 6 375 PFDPFD SER A (NYCB-PA) in SEC 13F filings for 2026-03-31. Largest institutional holders: GROUP ONE TRADING LLC ($92.7M), SIMPLEX TRADING, LLC ($15.1M), IMC-Chicago, LLC ($13.5M), KELLEHER FINANCIAL ADVISORS ($387,888), Golden State Equity Partners ($484). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GROUP ONE TRADING LLC | $92.7M | 7.0M | Trimmed |
| 2 | SIMPLEX TRADING, LLC | $15.1M | 1.1M | New |
| 3 | IMC-Chicago, LLC | $13.5M | 1.0M | Added |
| 4 | KELLEHER FINANCIAL ADVISORS | $387,888 | 10,010 | New |
| 5 | Golden State Equity Partners | $484 | 23 | New |
| 6 | 10Elms LLP | $0 | 0 | Exited |
| 7 | SG Americas Securities, LLC | $0 | 0 | Exited |
| 8 | Sender Co & Partners, Inc. | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31