JANE STREET GROUP, LLC is an institutional investment manager that files quarterly 13F reports with the SEC. As of Q4 2025, the fund manages $662.1B in reported equity holdings across 6563 positions. The largest holdings are SPY (14.5%), IWM (6.7%), NVDA (5.7%), TSLA (5.5%), META (3.3%). The portfolio is concentrated in Other (86.8%), Communication Services (5.6%), Technology (3.2%). Data sourced from SEC EDGAR 13F filings (CIK 1595888).