3 institutions reported holding $200,200 of GRANITE PNT MRTGG TR 7 00 SRS A PRF (GPMTPRA) in SEC 13F filings for 2026-06-30. Largest institutional holders: SIMPLEX TRADING, LLC ($178,200), FNY Investment Advisers, LLC ($22,000), GROUP ONE TRADING LLC ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SIMPLEX TRADING, LLC | $178,200 | 118,800 | Added |
| 2 | FNY Investment Advisers, LLC | $22,000 | 1,294 | New |
| 3 | GROUP ONE TRADING LLC | $0 | 0 | Exited |
来源：SEC 13F 申报文件 · 截至 2026-06-30