3 institutions reported holding $25.1M of PUBLIC STORAGE OPER CO (PSA-PR1) in SEC 13F filings for 2026-03-31. Largest institutional holders: IMC-Chicago, LLC ($20.3M), SIMPLEX TRADING, LLC ($4.7M), GROUP ONE TRADING LLC ($81,264). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $20.3M | 75,000 | Added |
| 2 | SIMPLEX TRADING, LLC | $4.7M | 17,200 | Added |
| 3 | GROUP ONE TRADING LLC | $81,264 | 300 | New |
Source: SEC Form 13F filings · as of 2026-03-31