CITADEL ADVISORS LLC is an institutional investment manager that files quarterly 13F reports with the SEC. As of Q2 2026, the fund manages $875.1B in reported equity holdings across 7166 positions. The largest holdings are SPY (6.8%), IWM (5.7%), MU (4.5%), TSLA (2.7%), NVDA (2.7%). The portfolio is concentrated in Other (87.0%), Communication Services (4.0%), Technology (4.0%). Data sourced from SEC EDGAR 13F filings (CIK 1423053).