1 institutions reported holding $1.6M of Rational AG (RTLLF) in SEC 13F filings for 2026-03-31. Largest institutional holders: GARDNER RUSSO & QUINN LLC ($1.6M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GARDNER RUSSO & QUINN LLC | $1.6M | 2,200 | Added |
Source: SEC Form 13F filings · as of 2026-03-31