Optiver Holding B.V. is an institutional investment manager that files quarterly 13F reports with the SEC. As of Q4 2025, the fund manages $268.8B in reported equity holdings across 2451 positions. The largest holdings are QQQ (20.3%), QQQ (15.7%), QQQ (9.5%), QQQ (9.1%), ^EWJV (3.5%). The portfolio is concentrated in Other (95.1%), Technology (2.0%), Communication Services (1.8%). Data sourced from SEC EDGAR 13F filings (CIK 1859606).