3 institutions reported holding $4.8M of COPT DEFENSE PROPERTIES (OFC-PL) in SEC 13F filings for 2026-06-30. Largest institutional holders: LANDMARK INVESTMENT PARTNERS, L.P. ($4.7M), GROUP ONE TRADING LLC ($21,834), SIMPLEX TRADING, LLC ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | LANDMARK INVESTMENT PARTNERS, L.P. | $4.7M | 129,000 | New |
| 2 | GROUP ONE TRADING LLC | $21,834 | 600 | Trimmed |
| 3 | SIMPLEX TRADING, LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30