ESSEX INVESTMENT MANAGEMENT CO LLC is an institutional investment manager that files quarterly 13F reports with the SEC. As of Q4 2025, the fund manages $656M in reported equity holdings across 306 positions. The largest holdings are TSEM (3.4%), KTOS (2.2%), STRL (2.1%), HCI (1.7%), LGND (1.7%). The portfolio is concentrated in Other (83.7%), Technology (6.9%), Industrials (4.6%). Data sourced from SEC EDGAR 13F filings (CIK 201772).