4 institutions reported holding $8.1M of ING GROEP N.V. (ISP) in SEC 13F filings for 2026-06-30. Largest institutional holders: Optiver Holding B.V. ($6.3M), IMC-Chicago, LLC ($1.1M), SIMPLEX TRADING, LLC ($461,286), GROUP ONE TRADING LLC ($273,006). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Optiver Holding B.V. | $6.3M | 199,700 | Trimmed |
| 2 | IMC-Chicago, LLC | $1.1M | 35,500 | Trimmed |
| 3 | SIMPLEX TRADING, LLC | $461,286 | 14,700 | Trimmed |
| 4 | GROUP ONE TRADING LLC | $273,006 | 8,700 | Trimmed |
来源：SEC 13F 申报文件 · 截至 2026-06-30