TGEN Insider Trading

Insider Ownership Percentage: 12.00%
Insider Buying (Last 12 Months): $107,101.17
Insider Selling (Last 12 Months): $0.00

Tecogen Insider Trading History Chart

This chart shows the insider buying and selling history at Tecogen by year and by quarter.

Skip ChartChart Data in Insider Trading History Table

Tecogen Share Price & Price History

Current Price: $1.71
Price Change: ▼ Price Decrease of -0.17 (-9.04%)
As of 11/4/2026 04:10 PM ET

This chart shows the closing price history over time for TGEN up to the past year.

Skip Chart and Table DataPrice Data in Insider Trading History Table
Days: 30 | 90 | 365

Tecogen Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
4/24/2026Ahmed GhoniemDirectorBuy12,723$0.79$10,051.1712,723View SEC Filing Icon  
4/13/2026Susan B HirschDirectorBuy5,000$3.73$18,650.00265,416View SEC Filing Icon  
3/27/2026Susan B HirschDirectorBuy10,000$2.54$25,400.00260,416View SEC Filing Icon  
3/23/2026John Kimball Iv WhitingGeneral CounselBuy10,000$2.38$23,800.0022,612View SEC Filing Icon  
3/20/2026Abinand RangeshCEOBuy3,000$2.30$6,900.0067,193View SEC Filing Icon  
3/20/2026Roger P DeschenesCAOBuy10,000$2.23$22,300.0052,962View SEC Filing Icon  
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SEC Filings (Institutional Ownership Changes) for Tecogen (NYSEAMERICAN:TGEN)

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at TGEN by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

Tecogen Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
10/23/2026Citizens Financial Group Inc. RI20,000$57K0.0%+100.0%0.066%Search for SEC Filing on Google Icon
9/9/2026Gratia Capital LLC388,660$2.03M1.2%N/A1.287%Search for SEC Filing on Google Icon
9/9/2026Integrated Wealth Concepts LLC112,080$0.59M0.0%-48.7%0.371%Search for SEC Filing on Google Icon
5/15/2026Granahan Investment Management LLC88,496$0.23M0.0%-50.2%0.296%Search for SEC Filing on Google Icon
5/14/2026Renaissance Technologies LLC272,300$0.70M0.0%+401.5%0.911%Search for SEC Filing on Google Icon
5/14/2026Gabelli Funds LLC20,000$51K0.0%N/A0.067%Search for SEC Filing on Google Icon
5/7/2026Dimensional Fund Advisors LP11,163$29K0.0%N/A0.037%Search for SEC Filing on Google Icon
5/1/2026Citizens Financial Group Inc. RI10,000$26K0.0%N/A0.033%Search for SEC Filing on Google Icon
4/24/2026Shikiar Asset Management Inc.17,650$45K0.0%+32.7%0.059%Search for SEC Filing on Google Icon
4/16/2026Thompson Davis & CO. Inc.99,000$0.25M0.2%-17.8%0.332%Search for SEC Filing on Google Icon
2/18/2026Ark Wealth Advisors LLC14,881$74K0.1%N/A0.050%Search for SEC Filing on Google Icon
2/18/2026XTX Topco Ltd54,763$0.27M0.0%N/A0.183%Search for SEC Filing on Google Icon
2/18/2026Millennium Management LLC22,507$0.11M0.0%-53.3%0.075%Search for SEC Filing on Google Icon
2/17/2026Arosa Capital Management LP350,000$1.73M0.2%+21.7%1.173%Search for SEC Filing on Google Icon
2/17/2026Granahan Investment Management LLC177,822$0.88M0.0%+58.3%0.596%Search for SEC Filing on Google Icon
2/17/2026Royal Bank of Canada85,545$0.42M0.0%-30.1%0.287%Search for SEC Filing on Google Icon
2/17/2026Mangrove Partners IM LLC61,207$0.30M0.0%N/A0.205%Search for SEC Filing on Google Icon
2/16/2026OMERS ADMINISTRATION Corp42,000$0.21M0.0%N/A0.141%Search for SEC Filing on Google Icon
2/13/2026Marshall Wace LLP286,325$1.41M0.0%+483.3%0.959%Search for SEC Filing on Google Icon
2/13/2026Gendell Jeffrey L295,541$1.46M0.0%+21.3%0.990%Search for SEC Filing on Google Icon
2/12/2026Commonwealth Equity Services LLC11,774$58K0.0%N/A0.039%Search for SEC Filing on Google Icon
2/12/2026Renaissance Technologies LLC54,300$0.27M0.0%-46.9%0.182%Search for SEC Filing on Google Icon
2/11/2026LPL Financial LLC73,793$0.37M0.0%N/A0.247%Search for SEC Filing on Google Icon
2/11/2026J.W. Cole Advisors Inc.26,300$0.13M0.0%-16.2%0.088%Search for SEC Filing on Google Icon
2/10/2026Goldman Sachs Group Inc.67,724$0.34M0.0%-49.0%0.227%Search for SEC Filing on Google Icon
2/9/2026Geode Capital Management LLC177,914$0.88M0.0%+6.8%0.596%Search for SEC Filing on Google Icon
2/6/2026HighTower Advisors LLC132,665$0.66M0.0%+110.4%0.444%Search for SEC Filing on Google Icon
2/2/2026Hidden Cove Wealth Management LLC21,087$0.10M0.1%+50.2%0.071%Search for SEC Filing on Google Icon
1/22/2026Shikiar Asset Management Inc.13,300$66K0.0%-28.1%0.045%Search for SEC Filing on Google Icon
1/20/2026Palisades Investment Partners LLC390,212$1.93M0.7%+3.6%1.307%Search for SEC Filing on Google Icon
1/20/2026Harbor Capital Advisors Inc.40,447$0.20M0.0%+47.2%0.136%Search for SEC Filing on Google Icon
1/12/2026Thompson Davis & CO. Inc.120,450$0.60M0.4%+2.1%0.404%Search for SEC Filing on Google Icon
11/18/2025Advisory Services Network LLC5,000$44K0.0%-50.0%0.017%Search for SEC Filing on Google Icon
11/17/2025NewEdge Advisors LLC10,300$91K0.0%N/A0.035%Search for SEC Filing on Google Icon
11/17/2025Millennium Management LLC48,245$0.43M0.0%N/A0.162%Search for SEC Filing on Google Icon
11/17/2025Integrated Wealth Concepts LLC216,465$1.91M0.0%+22.1%0.729%Search for SEC Filing on Google Icon
11/17/2025Granahan Investment Management LLC112,338$0.99M0.0%N/A0.378%Search for SEC Filing on Google Icon
11/17/2025Bank of America Corp DE4,836$43K0.0%+4,069.0%0.016%Search for SEC Filing on Google Icon
11/17/2025Bard Associates Inc.690,611$6.08M1.6%+10.7%2.326%Search for SEC Filing on Google Icon
11/17/2025Apis Capital Advisors LLC153,000$1.35M0.3%N/A0.515%Search for SEC Filing on Google Icon
11/14/2025Raymond James Financial Inc.157,888$1.39M0.0%N/A0.532%Search for SEC Filing on Google Icon
11/14/2025Virtu Financial LLC20,036$0.18M0.0%N/A0.067%Search for SEC Filing on Google Icon
11/14/2025Two Sigma Investments LP246,705$2.17M0.0%N/A0.831%Search for SEC Filing on Google Icon
11/14/2025Bridgeway Capital Management LLC25,500$0.23M0.0%N/A0.086%Search for SEC Filing on Google Icon
11/14/2025Portolan Capital Management LLC595,806$5.25M0.3%+28.0%2.007%Search for SEC Filing on Google Icon
11/13/2025Russell Investments Group Ltd.94,696$0.83M0.0%N/A0.319%Search for SEC Filing on Google Icon
11/12/2025Gamco Investors INC. ET AL40,000$0.35M0.0%-4.8%0.135%Search for SEC Filing on Google Icon
11/12/2025Evernest Financial Advisors LLC34,150$0.30M0.1%N/A0.115%Search for SEC Filing on Google Icon
11/7/2025Vanguard Group Inc.870,440$7.67M0.0%+5.4%2.932%Search for SEC Filing on Google Icon
11/7/2025Herald Investment Management Ltd446,078$3.90M0.5%+38.9%1.502%Search for SEC Filing on Google Icon
11/5/2025Thompson Davis & CO. Inc.117,953$1.04M0.6%N/A0.397%Search for SEC Filing on Google Icon
11/5/2025J.W. Cole Advisors Inc.31,400$0.28M0.0%N/A0.106%Search for SEC Filing on Google Icon
11/3/2025New York State Common Retirement Fund137,200$1.21M0.0%N/A0.462%Search for SEC Filing on Google Icon
10/30/2025Palisades Investment Partners LLC376,594$3.32M1.3%N/A1.268%Search for SEC Filing on Google Icon
10/24/2025Hidden Cove Wealth Management LLC14,042$0.12M0.1%N/A0.047%Search for SEC Filing on Google Icon
10/23/2025Clear Harbor Asset Management LLC611,600$5.39M0.3%+0.3%2.060%Search for SEC Filing on Google Icon
10/22/2025CoreCap Advisors LLC4,944$44K0.0%N/A0.017%Search for SEC Filing on Google Icon
10/20/2025Calamos Advisors LLC12,479$0.11M0.0%N/A0.042%Search for SEC Filing on Google Icon
10/15/2025Harbor Capital Advisors Inc.27,481$0.24M0.0%N/A0.093%Search for SEC Filing on Google Icon
10/15/2025ARS Investment Partners LLC43,173$0.38M0.0%N/A0.145%Search for SEC Filing on Google Icon
10/14/2025Shikiar Asset Management Inc.18,500$0.16M0.0%-15.9%0.062%Search for SEC Filing on Google Icon
8/15/2025Gendell Jeffrey L41,700$0.28M0.0%N/A0.165%Search for SEC Filing on Google Icon
8/13/2025Gamco Investors INC. ET AL42,000$0.29M0.0%N/A0.166%Search for SEC Filing on Google Icon
8/13/2025Corsair Capital Management L.P.67,760$0.46M0.1%N/A0.268%Search for SEC Filing on Google Icon
8/12/2025Heron Bay Capital Management37,167$0.25M0.0%N/A0.147%Search for SEC Filing on Google Icon
8/8/2025Geode Capital Management LLC142,850$0.97M0.0%N/A0.565%Search for SEC Filing on Google Icon
7/24/2025Shikiar Asset Management Inc.22,000$0.15M0.0%N/A0.087%Search for SEC Filing on Google Icon
7/22/2025Herald Investment Management Ltd321,078$2.19M0.3%N/A1.271%Search for SEC Filing on Google Icon
7/18/2025PFG Investments LLC62,523$0.43M0.0%N/A0.247%Search for SEC Filing on Google Icon
7/14/2025Clear Harbor Asset Management LLC610,000$4.15M0.3%N/A2.414%Search for SEC Filing on Google Icon
Data available starting January 2016

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Tecogen logo
Tecogen Inc. designs, manufactures, markets, and maintains industrial and commercial cogeneration systems for residential, commercial, recreational, and industrial use in the United States and internationally. It operates through three segments: Products, Services, and Energy Production. The company offers InVerde e+ and TecoPower, a cogeneration product that supplies electricity and hot water; TECOCHILL air-conditioning and refrigeration chillers; Tecofrost gas engine-driven refrigeration compressors; and water heaters under the Ilios brand name, as well as emissions control technology under the Ultera brand name. It also provides long-term maintenance contracts, parts sales, and turnkey installation services through a network of eleven field service centers in California, the Midwest, the Northeast, and the Southeast, as well as in Ontario, Canada. In addition, the company installs, owns, operates, and maintains distributed generation of electricity, energy, and other complementary systems. It serves hospitals and nursing homes, colleges, universities, health clubs, spas, hotels, motels, office and retail buildings, food and beverage processors, multi-unit residential buildings, laundries, ice rinks, swimming pools, factories, municipal buildings, military installations, and indoor growing facilities. The company was incorporated in 2000 and is headquartered in Waltham, Massachusetts.
Read More on Tecogen

Today's Range

Now: $1.71
Low: $1.69
High: $1.92

50 Day Range

MA: $2.66
Low: $1.71
High: $3.32

52 Week Range

Now: $1.71
Low: $1.69
High: $9.45

Volume

212,863 shs

Average Volume

224,683 shs

Market Capitalization

$51.62 million

P/E Ratio

N/A

Dividend Yield

N/A

Beta

2.38

Who are the company insiders with the largest holdings of Tecogen?

Tecogen's top insider shareholders include:
  1. Susan B Hirsch (Director)
  2. Charlest Maxwell (Director)
  3. Abinand Rangesh (CEO)
  4. Roger P Deschenes (CAO)
  5. John Kimball Iv Whiting (General Counsel)
  6. Ahmed Ghoniem (Director)
  7. Locke M Benjamin (CEO)
  8. David A Garrison (CFO)
  9. Earl R Lewis (Director)
  10. John Hatsopoulos (Director)
Learn More about top insider investors at Tecogen.

Who are the major institutional investors of Tecogen?

Tecogen's top institutional investors include:
  1. Citizens Financial Group Inc. RI — 0.07%
Learn More about top institutional investors of Tecogen stock.

Which major investors are buying Tecogen stock?

In the previous quarter, TGEN stock was acquired by institutional investors including:
  1. Citizens Financial Group Inc. RI
During the last year, these company insiders have bought Tecogen stock:
  1. Susan B Hirsch (Director)
  2. Abinand Rangesh (CEO)
  3. Roger P Deschenes (CAO)
  4. John Kimball Iv Whiting (General Counsel)
  5. Ahmed Ghoniem (Director)
Learn More investors buying Tecogen stock.