2 institutions reported holding $3,420 of GRID DYNAMICS HLDGS INC (GDYNW) in SEC 13F filings for 2026-03-31. Largest institutional holders: SIMPLEX TRADING, LLC ($2,280), GROUP ONE TRADING LLC ($1,140). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SIMPLEX TRADING, LLC | $2,280 | 400 | Trimmed |
| 2 | GROUP ONE TRADING LLC | $1,140 | 200 | Added |
Source: SEC Form 13F filings · as of 2026-03-31