9 institutions reported holding $93.6M of REALTY INCOME CORP CALL (O-PF) in SEC 13F filings for 2026-06-30. Largest institutional holders: IMC-Chicago, LLC ($58.5M), GROUP ONE TRADING LLC ($19.3M), SIMPLEX TRADING, LLC ($8.9M), Maven Securities LTD ($3.6M), LANDMARK INVESTMENT PARTNERS, L.P. ($3.1M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $58.5M | 944,100 | Added |
| 2 | GROUP ONE TRADING LLC | $19.3M | 311,400 | Trimmed |
| 3 | SIMPLEX TRADING, LLC | $8.9M | 143,700 | Added |
| 4 | Maven Securities LTD | $3.6M | 58,800 | Trimmed |
| 5 | LANDMARK INVESTMENT PARTNERS, L.P. | $3.1M | 50,000 | New |
| 6 | 10Elms LLP | $82,885 | 0 | Hold |
| 7 | SG Americas Securities, LLC | $34,000 | 70,400 | Trimmed |
| 8 | Luminist Capital LLC | $9,816 | 0 | Hold |
| 9 | Burns Matteson Capital Management, LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30