Portolan Capital Management, LLC is an institutional investment manager that files quarterly 13F reports with the SEC. As of Q2 2026, the fund manages $2.7B in reported equity holdings across 148 positions. The largest holdings are VPG (5.7%), VIRT (4.8%), TTMI (3.6%), MOD (3.1%), QLYS (2.7%). The portfolio is concentrated in Other (87.2%), Technology (5.3%), Industrials (4.6%). Data sourced from SEC EDGAR 13F filings (CIK 1350290).