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T

Tecogen TGEN · USD

Industrials · US listing · 🇺🇸 United States

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1.77

+2.91%

Close of 9 Nov 2026, in USD

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Reference data, closing prices and charts across 45,000 companies, plus crypto, commodities and currencies.

Largest shareholders

As filed, so dates differ, and a group and its funds can both appear.

HolderSharesStakeChangeFiled
Pacheco (Ann Marie)3.7m12.39%—25 Apr 2025
George N. Hatsopoulos UEO2.7m9.19%+4.3k25 Apr 2025
Comeau (Joseph)2.3m7.57%—25 Apr 2025
Natsis (Tryfon)1.7m5.78%+109.8k25 Apr 2025
Hatsopoulos (John N)1m3.42%+457.5k25 Apr 2025
Lewis (Earl R)1m3.35%+274k6 May 2025
The Vanguard Group, Inc.825.6k2.77%+825.6k30 Jun 2025
Bard Associates Inc.623.6k2.09%+623.6k30 Jun 2025
Clear Harbor Asset Management, LLC610k2.04%+610k30 Jun 2025
Portolan Capital Management, L.L.C.465.6k1.56%+465.6k30 Jun 2025
Herald Investment Management Limited321.1k1.08%+321.1k30 Jun 2025
Fidelity Management & Research Company LLC283k0.95%+283k30 Jun 2025
Hirsch (Susan B)250.4k0.84%—25 Apr 2025
BlackRock Institutional Trust Company, N.A.184.8k0.62%+184.8k30 Jun 2025
Integrated Financial Partners177.3k0.59%+177.3k30 Jun 2025

Short interest

Shares sold short, 15 Oct 2026. US exchange data.

1.1m

-1.4% on the period before. 8.6 days to cover.

Short volume

Share of the day's trading sold short, 4 Nov 2026

43.2%

Last 60 trading days.

Failed deliveries

Shares not delivered on settlement, from the SEC

  • 30 Sept 20264 shares
  • 24 Sept 20261,468 shares
  • 23 Sept 20262,615 shares
  • 9 Sept 202610,063 shares
  • 19 Aug 20262,387 shares

Sources and methodology

Data on this tab
Our data supplier
Chart on the Overview
TradingView

Nothing here is investment advice. Prices can be delayed or wrong, so check with the exchange before relying on them. Data for this page. How we cover markets.