2 institutions reported holding $668,577 of KILROY REALTY CORP (KRC-PG) in SEC 13F filings for 2026-03-31. Largest institutional holders: GROUP ONE TRADING LLC ($657,293), SIMPLEX TRADING, LLC ($11,284). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GROUP ONE TRADING LLC | $657,293 | 23,300 | Added |
| 2 | SIMPLEX TRADING, LLC | $11,284 | 400 | Trimmed |
Source: SEC Form 13F filings · as of 2026-03-31