3 institutions reported holding $223,020 of GRIFOLS S A (GIKLY) in SEC 13F filings for 2026-06-30. Largest institutional holders: SIMPLEX TRADING, LLC ($173,460), GROUP ONE TRADING LLC ($49,560), YOUSIF CAPITAL MANAGEMENT, LLC ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SIMPLEX TRADING, LLC | $173,460 | 24,500 | Trimmed |
| 2 | GROUP ONE TRADING LLC | $49,560 | 7,000 | Added |
| 3 | YOUSIF CAPITAL MANAGEMENT, LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30