TGEN TECOGEN INC.: institutional ownership and insider trading
71 funds reported holding $59.8M of TECOGEN INC. in their latest 13F filings; in Q2 2026 funds net bought $12.5M, with 21 new positions and 13 funds selling out; over the last 12 months insiders bought $134K and sold $0 on the open market.
Famous investors holding TGEN
- Ken Griffin (Citadel Advisors): $3.06M, 0.0% of the portfolio
- D. E. Shaw (D. E. Shaw & Co.): $80.1K, 0.0% of the portfolio
Largest institutional holders of TGEN
- Portolan Capital Management, LLC — $8.10M
- VANGUARD GROUP INC — $4.31M
- VANGUARD CAPITAL MANAGEMENT LLC — $4.12M
- BARD ASSOCIATES INC — $3.56M
- Clear Harbor Asset Management, LLC — $3.39M
- CITADEL ADVISORS LLC — $3.06M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP — $2.80M
- PEAK6 LLC — $2.46M
- JANE STREET GROUP, LLC — $2.27M
- GRATIA CAPITAL, LLC — $2.03M
Recent TGEN insider trades
- Apr 24, 2026: Ghoniem Ahmed bought 12,723 shares ($10.1K)
- Apr 13, 2026: Hirsch Susan B bought 5,000 shares ($18.7K)
- Mar 27, 2026: Lewis Earl bought 5,000 shares ($12.6K)
- Mar 27, 2026: Hirsch Susan B bought 10,000 shares ($25.4K)
5%+ owners
- Portolan Capital Management, LLC: 5.2% (Schedule 13G, filed Jun 10, 2026)