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Tecogen Insider Trading Activity

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At close: Dec 16, 4:00 PM EST
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Insider Trades

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Tecogen Insider Trading Activity | AMEX:TGEN | Benzinga

Track the latest Tecogen insider trading activity. Stay informed on recent buys, sells, and market impact for Tecogen stock.

What is Insider Activity?

Insider trading activity involves company insiders, such as executives, directors, and employees, engaging in transactions of their own company's stock. Insiders' buy and sell transactions provide valuable insights into their confidence in the company's future performance.

What are Tecogen Inc Insiders Doing?

Insiders have report no purchases/sales in the last 30 days.

Notable Recent Insider Buys and Sales

There has been no Insider buying or selling in the last 90 days.

Ownership Statistics for Tecogen Inc

Shares Outstanding
29.846M
Insider Shares Owned
4.098M
Insider Percentage Owned
13.7%
Institutional Shares Held
3.661M
Institutional Percentage Held
12.3%
Jun 24, 2025Stephen LafailleVP BUSINESS DEVELOPMENT400.00$3.36-$288.55KBUY∞400.00Mar 03 - Jun 23View
Dec 06, 2024Earl R LewisDIRECTOR100.00K$0.71$71.00KBUY15.70%737.00KNov 22View
Dec 06, 2024Earl R LewisDIRECTOR2.00K$0.80$1.60KBUY0.31%637.00KOct 09View
Sep 27, 2024John HatsopoulosDIRECTOR10.00K$0.84$8.38KBUY1.02%988.95KSep 27View
Sep 25, 2024John HatsopoulosDIRECTOR10.00K$0.86$8.60KBUY1.03%978.95KSep 25View
Aug 20, 2024John HatsopoulosDIRECTOR10.00K$0.90$8.95KBUY1.04%968.95KAug 19View
Jul 17, 2024Earl R LewisDIRECTOR10.00K$0.68$6.80KBUY1.60%635.00KJul 15View
Jul 15, 2024Earl R LewisDIRECTOR10.00K$0.68$6.80KBUY1.63%625.00KJul 15View
Jul 12, 2024John HatsopoulosDIRECTOR22.47K$0.65$14.60KBUY2.40%958.95KJul 10View
May 29, 2024John HatsopoulosDIRECTOR1.26K$0.80$1.01KBUY0.14%936.49KMay 28View
May 29, 2024John HatsopoulosDIRECTOR10.00K$0.80$8.00KBUY1.08%935.22KMay 29View
May 28, 2024John HatsopoulosDIRECTOR11.94K$0.80$9.52KBUY1.31%925.22KMay 22 - May 24View
May 22, 2024John HatsopoulosDIRECTOR13.80K$0.79$10.90KBUY1.53%913.28KMay 21View
May 17, 2024John HatsopoulosDIRECTOR3.00K$0.75$2.25KBUY0.33%899.49KMay 16View
May 16, 2024John HatsopoulosDIRECTOR10.00K$0.74$7.40KBUY1.13%896.49KMay 15View
May 03, 2024Earl R LewisDIRECTOR5.00K$0.75$3.75KBUY0.82%615.00KMay 01View
Apr 24, 2024Earl R LewisDIRECTOR10.00K$0.68$6.80KBUY1.67%610.00KApr 24View
Apr 24, 2024John HatsopoulosDIRECTOR5.00K$0.67$3.35KBUY0.57%886.49KApr 24View
Apr 23, 2024John HatsopoulosDIRECTOR6.00K$0.68$4.10KBUY0.69%881.49KApr 23View
Apr 16, 2024John HatsopoulosDIRECTOR1.00K$0.68$679.00BUY0.11%875.49KApr 16View
Apr 16, 2024John HatsopoulosDIRECTOR1.00K$0.70$700.00BUY0.11%874.49KApr 15View
Apr 12, 2024John HatsopoulosDIRECTOR1.00K$0.70$699.70BUY0.11%873.49KApr 12View
Apr 11, 2024John HatsopoulosDIRECTOR1.00K$0.70$700.00BUY0.11%872.49KApr 11View
Apr 09, 2024John HatsopoulosDIRECTOR1.00K$0.70$700.00BUY0.11%871.49KApr 09View
Apr 08, 2024John HatsopoulosDIRECTOR1.00K$0.70$700.00BUY0.12%870.49KApr 08View
Apr 02, 2024John HatsopoulosDIRECTOR10.00K$0.70$7.00KBUY1.16%869.49KMar 27 - Apr 01View
Jan 25, 2024Earl R LewisDIRECTOR9.15K$0.78$7.14KBUY1.66%560.84KJan 24View
Jan 23, 2024Earl R LewisDIRECTOR10.00K$0.68$6.80KBUY1.85%551.68KJan 23View
Jan 23, 2024John HatsopoulosDIRECTOR10.00K$0.77$7.70KBUY1.18%859.49KJan 22View
Jan 19, 2024John HatsopoulosDIRECTOR10.00K$0.73$7.35KBUY1.19%849.49KJan 18View
Jan 16, 2024John HatsopoulosDIRECTOR100.00K$0.73$73.46KBUY13.52%839.49KJan 16View
Dec 28, 2023John HatsopoulosDIRECTOR25.00K$0.80$20.00KBUY3.50%739.49KDec 27View
Dec 26, 2023John HatsopoulosDIRECTOR25.00K$0.80$20.00KBUY3.63%714.49KDec 22View
Dec 15, 2023John HatsopoulosDIRECTOR50.00K$0.89$44.67KBUY7.82%689.49KDec 14View
Nov 21, 2023John HatsopoulosDIRECTOR4.00K$0.84$3.38KBUY0.63%639.49KNov 20View
Nov 17, 2023John HatsopoulosDIRECTOR46.00K$0.84$38.87KBUY7.80%635.49KNov 17View
Nov 17, 2023John HatsopoulosDIRECTOR100.00$0.84$84.50BUY0.02%589.49KNov 14View
Oct 20, 2023Susan B HirschDIRECTOR5.00K$0.92$4.58KBUY2.04%250.42KOct 19View
Oct 18, 2023Earl R LewisDIRECTOR25.00K$0.91$22.75KBUY4.84%541.68KOct 18View
Oct 17, 2023John HatsopoulosDIRECTOR50.00K$0.80$40.00KBUY9.27%589.38KOct 17View
Oct 13, 2023John HatsopoulosDIRECTOR50.00K$0.80$40.00KBUY10.22%539.38KOct 12View
Oct 11, 2023Earl R LewisDIRECTOR2.00K$0.80$1.60KBUY0.39%516.68KOct 09View
Oct 02, 2023John HatsopoulosDIRECTOR2.00K$0.98$1.96KBUY0.41%489.38KSep 29View
Sep 28, 2023John HatsopoulosDIRECTOR1.38K$0.91$1.26KBUY0.28%487.38KSep 27View
Sep 27, 2023John HatsopoulosDIRECTOR2.00K$0.92$1.84KBUY0.41%486.00KSep 26View
Sep 19, 2023John HatsopoulosDIRECTOR5.00K$0.91$4.55KBUY1.04%484.00KSep 19View
Sep 11, 2023Earl R LewisDIRECTOR10.00K$0.95$9.50KBUY1.98%514.68KSep 08View
Sep 08, 2023John HatsopoulosDIRECTOR200.00$1.00$200.00BUY0.04%479.00KSep 07View
Sep 06, 2023Earl R LewisDIRECTOR10.00K$1.00$10.00KBUY2.02%504.68KSep 05View
Sep 06, 2023John HatsopoulosDIRECTOR10.00K$0.97$9.70KBUY2.13%478.81KSep 05View
Sep 01, 2023Abinand RangeshCHIEF EXECUTIVE OFFICER1.00K$1.02$1.02KBUY10.76%10.30KAug 15 - Aug 30View
Aug 23, 2023John HatsopoulosDIRECTOR5.00K$1.12$5.60KBUY1.08%468.81KAug 22View
Aug 17, 2023John HatsopoulosDIRECTOR9.67K$1.02$9.86KBUY2.13%463.81KAug 15 - Aug 17View
Aug 17, 2023Earl R LewisDIRECTOR1.50K$1.00$1.50KBUY0.30%494.68KAug 14View
Jun 27, 2023John HatsopoulosDIRECTOR1.00K$0.96$960.00BUY0.22%454.13KJun 26View
Jun 21, 2023John HatsopoulosDIRECTOR3.00K$1.00$3.00KBUY0.67%453.13KJun 20View
Jun 20, 2023Abinand RangeshCHIEF EXECUTIVE OFFICER1.50K$1.04$1.56KBUY19.23%9.30KJun 20View
Jun 15, 2023John HatsopoulosDIRECTOR5.00K$1.11$5.55KBUY1.12%450.13KJun 15View
Jun 12, 2023John HatsopoulosDIRECTOR5.00K$1.12$5.60KBUY1.14%445.13KJun 12View
Jun 09, 2023John HatsopoulosDIRECTOR500.00$1.09$546.25BUY0.11%440.13KJun 08View
Jun 08, 2023John HatsopoulosDIRECTOR10.00K$1.00$9.99KBUY2.33%439.63KJun 07View
Jun 07, 2023John HatsopoulosDIRECTOR7.00K$1.00$7.00KBUY1.66%429.63KJun 06View
Jun 06, 2023John HatsopoulosDIRECTOR1.00K$1.14$1.14KBUY0.24%422.63KJun 06View
Jun 05, 2023John HatsopoulosDIRECTOR1.00K$1.09$1.09KBUY0.24%421.63KJun 02View
May 26, 2023John HatsopoulosDIRECTOR1.00K$1.17$1.17KBUY0.24%420.63KMay 26View
May 26, 2023John HatsopoulosDIRECTOR2.00K$1.17$2.34KBUY0.48%419.63KMay 23 - May 25View
May 16, 2023John HatsopoulosDIRECTOR3.65K$1.00$3.65KBUY0.88%417.63KMay 15View
May 16, 2023Earl R LewisDIRECTOR10.00K$0.96$9.60KBUY2.07%493.18KMay 15View
Mar 30, 2023Earl R LewisDIRECTOR35.00K$1.09$38.00KBUY7.81%483.18KMar 24 - Mar 29View
Mar 29, 2023John HatsopoulosDIRECTOR17.70K$1.00$17.70KBUY4.47%413.98KMar 28View
Mar 27, 2023John HatsopoulosDIRECTOR11.42K$1.00$11.39KBUY2.97%396.28KMar 27View
Mar 27, 2023Abinand RangeshCHIEF EXECUTIVE OFFICER1.80K$0.88$1.58KBUY30.00%7.80KMar 20View
Mar 24, 2023John HatsopoulosDIRECTOR50.00K$0.92$45.99KBUY14.93%384.86KMar 24View
Mar 23, 2023Earl R LewisDIRECTOR5.00K$0.87$4.35KBUY1.13%448.18KMar 22View
Mar 21, 2023John HatsopoulosDIRECTOR10.00K$0.88$8.80KBUY3.08%334.86KMar 21View
Mar 21, 2023Earl R LewisDIRECTOR15.00K$0.89$13.35KBUY3.50%443.18KMar 20View
Mar 21, 2023John HatsopoulosDIRECTOR10.00K$0.84$8.40KBUY3.18%324.86KMar 20View
Oct 19, 2022John HatsopoulosDIRECTOR5.00K$1.00$5.00KBUY1.61%314.86KOct 19View
Oct 18, 2022John HatsopoulosDIRECTOR5.00K$0.98$4.90KBUY1.64%309.86KOct 17View
Oct 12, 2022John HatsopoulosDIRECTOR10.00K$0.96$9.60KBUY3.39%304.86KOct 10 - Oct 11View
Sep 29, 2022Earl R LewisDIRECTOR13.18K$0.96$12.62KBUY3.18%428.18KSep 28 - Sep 29View
Sep 12, 2022John HatsopoulosDIRECTOR5.00K$1.17$5.83KBUY1.72%294.86KSep 08View
Sep 02, 2022John HatsopoulosDIRECTOR15.00K$1.10$16.50KBUY5.46%289.86KAug 31 - Sep 02View
Aug 30, 2022John HatsopoulosDIRECTOR15.00K$1.20$18.05KBUY5.77%274.86KAug 26 - Aug 30View
Aug 25, 2022John HatsopoulosDIRECTOR15.00K$1.24$18.67KBUY6.13%259.86KAug 23 - Aug 25View
Aug 23, 2022John HatsopoulosDIRECTOR5.00K$1.21$6.05KBUY2.08%244.86KAug 22View
Aug 19, 2021Earl R LewisDIRECTOR15.00K$1.86$27.90KBUY6.00%265.00KAug 17View
Jun 09, 2020Earl R Lewis—100.00K$0.87$87.29KGRANT OR AWARD100.00%200.00KJun 08View
Apr 24, 2020JOHN HATSOPOULOS—25.00K$1.00$25.09KPURCHASE1.08%2.33MApr 23View
Apr 21, 2020Locke Benjamin—2.00K$1.02$2.04KPURCHASE58.51%5.42KApr 21View
Nov 14, 2017Benjamin LockeCO-CEO2.00K$2.64$5.28KBUY141.04%3.42KNov 14View
Jan 11, 2017Charles T. MaxwellDIRECTOR25.00K$4.00$100.00KBUY23.86%129.77KJan 06View
Jan 04, 2017Charles T. MaxwellDIRECTOR29.77K$3.87$115.15KBUY39.69%104.77KDec 23 - Jan 04View
Apr 25, 2016JOHN HATSOPOULOSCHIEF EXECUTIVE OFFICER127.23K$0.00$0.00BUY∞127.23KApr 22View
Apr 25, 2016George N Hatsopoulos10% OWNER50.89K$0.00$0.00BUY3.90%1.36MApr 22View
Jun 01, 2015David A GarrisonCFO, TREASURER AND SECRETARY1.50K$4.31$6.47KBUY17.65%10.00KMay 28 - Jun 01View
Dec 04, 2014David A GarrisonCFO, TREASURER AND SECRETARY4.05K$5.54$22.45KBUY91.01%8.50KDec 02View
Dec 01, 2014David A GarrisonCFO, TREASURER AND SECRETARY4.45K$5.74$25.54KBUY∞4.45KNov 26View
Oct 13, 2009DAVID GREENHOUSE AUSTIN MARXE10% OWNER-875.00K$0.26-$227.40KSELL-100.00%0.00Oct 09 - Oct 12View
Oct 09, 2009DAVID GREENHOUSE AUSTIN MARXE10% OWNER-1.32M$0.27-$357.55KSELL-60.15%875.00KOct 07 - Oct 08View
Sep 11, 2009DAVID GREENHOUSE AUSTIN MARXE10% OWNER-160.00K$0.51-$81.63KSELL-6.79%2.20MSep 09View
Jun 08, 2009DAVID GREENHOUSE AUSTIN MARXE10% OWNER-146.45K$0.05-$7.38KSELL-5.85%2.36MJun 03 - Jun 05View
Jun 25, 2008DAVID GREENHOUSE AUSTIN MARXE10% OWNER-399.00$0.67-$267.33SELL-0.02%2.50MJun 23View
Apr 30, 2008DAVID GREENHOUSE AUSTIN MARXE10% OWNER-8.30K$0.91-$7.55KSELL-0.33%2.50MApr 28View
Apr 15, 2008DAVID GREENHOUSE AUSTIN MARXE10% OWNER-200.00$0.90-$180.00SELL-0.01%2.51MApr 11View
Apr 11, 2008DAVID GREENHOUSE AUSTIN MARXE10% OWNER-12.90K$0.94-$12.15KSELL-0.51%2.51MApr 09View
Apr 09, 2008DAVID GREENHOUSE AUSTIN MARXE10% OWNER-55.20K$0.92-$50.86KSELL-2.14%2.52MApr 07 - Apr 08View
Mar 05, 2008DAVID GREENHOUSE AUSTIN MARXE10% OWNER-2.37K$1.15-$2.73KSELL-0.09%2.58MMar 03View
Feb 08, 2008DAVID GREENHOUSE AUSTIN MARXE10% OWNER-42.80K$1.15-$49.20KSELL-1.63%2.58MFeb 06View
Sep 05, 2006H. Stewart ParkerPRESIDENT & CEO10.00K$1.99$19.93KBUY47.23%31.18KSep 05View
Aug 16, 2005BIOGEN IDEC INCBIOGEN IDEC MA INC10% OWNER-14.20K$0.71-$10.04KSELL-0.12%11.70MAug 12 - Aug 15View
Aug 12, 2005BIOGEN IDEC INCBIOGEN IDEC MA INC10% OWNER-25.00K$0.73-$18.26KSELL-0.21%11.72MAug 10View
Aug 10, 2005BIOGEN IDEC INCBIOGEN IDEC MA INC10% OWNER-25.45K$0.76-$19.32KSELL-0.22%11.74MAug 08 - Aug 09View
Aug 08, 2005BIOGEN IDEC INCBIOGEN IDEC MA INC10% OWNER-37.50K$0.76-$28.68KSELL-0.32%11.77MAug 04 - Aug 05View
Aug 04, 2005BIOGEN IDEC INCBIOGEN IDEC MA INC10% OWNER-26.20K$0.77-$20.21KSELL-0.22%11.81MAug 02 - Aug 03View
Aug 02, 2005BIOGEN IDEC INCBIOGEN IDEC MA INC10% OWNER-33.00K$0.78-$25.79KSELL-0.28%11.83MJul 29 - Aug 01View
Jul 29, 2005BIOGEN IDEC INCBIOGEN IDEC MA INC10% OWNER-36.50K$0.81-$29.48KSELL-0.31%11.87MJul 27 - Jul 28View
Jul 27, 2005BIOGEN IDEC INCBIOGEN IDEC MA INC10% OWNER-73.50K$0.84-$61.58KSELL-0.61%11.93MJul 25 - Jul 26View
Jul 22, 2005BIOGEN IDEC INCBIOGEN IDEC MA INC10% OWNER-35.10K$0.79-$27.79KSELL-0.29%12.00MJul 21 - Jul 22View
Jul 21, 2005BIOGEN IDEC INCBIOGEN IDEC MA INC10% OWNER-17.00K$0.81-$13.73KSELL-0.14%12.04MJul 19 - Jul 20View
Jul 18, 2005BIOGEN IDEC INCBIOGEN IDEC MA INC10% OWNER-49.63K$0.80-$39.76KSELL-0.41%12.05MJul 15 - Jul 18View
Jul 14, 2005BIOGEN IDEC INCBIOGEN IDEC MA INC10% OWNER-25.00K$0.81-$20.27KSELL-0.21%12.10MJul 13View
Jul 12, 2005BIOGEN IDEC INCBIOGEN IDEC MA INC10% OWNER2.41M$1.46$4.64MBUY24.80%12.13MSep 30 - Aug 15View
Jan 10, 2005ELAN CORP PLCELAN INTERNATIONAL SERVICES LTD10% OWNER-43.60K$1.75-$76.30KSELL-0.37%11.63MJan 06View
Jan 06, 2005ELAN CORP PLCELAN INTERNATIONAL SERVICES LTD10% OWNER-395.00K$1.74-$688.48KSELL-3.27%11.67MJan 04 - Jan 05View

FAQ

Q

Is insider trading legal?

A
Insider trading is legal so long as the insiders report those trades to the SEC. Illegal securities trading occurs when the insider is violating a fiduciary duty or fails to report their trades.
Q

What are some examples of market manipulation?

A
Insider trading, pump and dump schemes, front running and wash trades are all examples of market manipulation. Investors who track insider asset movement should think carefully about why these insiders are trading their stocks before moving forward.

Browse insider trades on all stocks.

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