TECOGEN INC/WALTHAM MA (TGEN) Institutional Ownership and Insiders Activity

TECOGEN INC/WALTHAM MA (TGEN) is widely held by institutional investors, with 66 firms reporting positions valued at approximately $45.28M based on SEC Form 13F filings for the quarter ended June 30, 2026.

Portolan Capital Management, Llc is the largest disclosed holder, reporting approximately $8.10M in TGEN holdings in its latest filing.