Tecogen Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

NYSEAM:TGEN Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
24 Apr 26	BuyUS$10,000	Ahmed Ghoniem	Individual	12,723	US$0.79
13 Apr 26	BuyUS$18,650	Susan Hirsch	Individual	5,000	US$3.73
27 Mar 26	BuyUS$25,400	Susan Hirsch	Individual	10,000	US$2.54
27 Mar 26	BuyUS$27,005	Earl Lewis	Individual	10,000	US$2.88
23 Mar 26	BuyUS$23,800	John Whiting	Individual	10,000	US$2.38
20 Mar 26	BuyUS$6,894	Abinand Rangesh	Individual	3,000	US$2.30
20 Mar 26	BuyUS$22,300	Roger Deschenes	Individual	10,000	US$2.23

Insider Trading Volume

Insider Buying: Insufficient data to determine if insiders have bought more shares than they have sold in the past 3 months.

Ownership Breakdown

What is the ownership structure of TGEN?
Owner Type	Number of Shares	Ownership Percentage
Hedge Funds	1,551,113	5.14%
Private Companies	1,812,468	6%
Institutions	8,099,943	26.8%
General Public	8,732,386	28.9%
Individual Insiders	9,991,912	33.1%

Dilution of Shares: Shareholders have not been meaningfully diluted in the past year.

Top Shareholders

Top 25 shareholders own 63.97% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
15.7%	John Hatsopoulos	4,738,575	US$16.2m	0%	no data
7.49%	Michael Bass	2,260,855	US$7.7m	0%	no data
6%	Estate Of George N. Hatsopoulos	1,812,468	US$6.2m	0%	no data
5.14%	Portolan Capital Management, LLC	1,551,113	US$5.3m	250%	0.2%
3.35%	Earl Lewis	1,011,006	US$3.5m	0%	no data
3.09%	Daphne Hatsopoulos	931,917	US$3.2m	0%	no data
2.96%	Vanguard Capital Management, LLC	894,626	US$3.1m	3.26%	no data
2.26%	Bard Associates Inc.	682,221	US$2.3m	-0.88%	0.51%
2.15%	Clear Harbor Asset Management, LLC	650,000	US$2.2m	0%	0.13%
1.52%	Tryfon Natsis	460,300	US$1.6m	0%	no data
1.39%	Herald Investment Management Ltd.	420,000	US$1.4m	0%	0.1%
1.29%	Gratia Capital, LLC	388,660	US$1.3m	0%	1.63%
1.21%	UBS Asset Management AG	364,632	US$1.2m	13.4%	no data
1.17%	Meros Investment Management, LP	353,487	US$1.2m	21.2%	0.36%
1.07%	Palisades Investment Partners, LLC	323,090	US$1.1m	-3.24%	0.33%
1.05%	Susquehanna International Group, LLP	315,831	US$1.1m	189%	no data
1%	Morgan Stanley	301,695	US$1.0m	293%	no data
0.96%	Raymond James Financial, Inc.	290,260	US$992.7k	56.2%	no data
0.88%	Susan Hirsch	265,416	US$907.7k	1.92%	no data
0.83%	BlackRock, Inc.	251,464	US$860.0k	36.1%	no data
0.8%	Citadel Advisors LLC	242,276	US$828.6k	64.3%	no data
0.73%	Huntleigh Advisors, Inc.	220,074	US$752.7k	0%	0.1%
0.72%	Integrated Wealth Concepts LLC	218,380	US$746.9k	0%	0.01%
0.6%	Heartland Advisors, Inc.	182,100	US$622.8k	0%	0.03%
0.6%	Geode Capital Management, LLC	180,870	US$618.6k	-5.8%	no data

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2026/08/23 17:55
End of Day Share Price	2026/08/21 00:00
Earnings	2026/06/30
Annual Earnings	2025/12/31

Data Sources

The data used in our company analysis is from S&P Global Market Intelligence LLC. The following data is used in our analysis model to generate this report. Data is normalised which can introduce a delay from the source being available.

Package	Data	Timeframe	Example US Source ^*
Company Financials	10 years	Income statement Cash flow statement Balance sheet	SEC Form 10-K SEC Form 10-Q
Analyst Consensus Estimates	+3 years	Forecast financials Analyst price targets	Analyst Research Reports Blue Matrix
Market Prices	30 years	Stock prices Dividends, Splits and Actions	ICE Market Data SEC Form S-1
Ownership	10 years	Top shareholders Insider trading	SEC Form 4 SEC Form 13D
Management	10 years	Leadership team Board of directors	SEC Form 10-K SEC Form DEF 14A
Key Developments	10 years	Company announcements	SEC Form 8-K

^* Example for US securities, for non-US equivalent regulatory forms and sources are used.

Unless specified all financial data is based on a yearly period but updated quarterly. This is known as Trailing Twelve Month (TTM) or Last Twelve Month (LTM) Data. Learn more.

Analysis Model and Snowflake

Details of the analysis model used to generate this report is available on our Github page, we also have guides on how to use our reports and tutorials on Youtube.

Learn about the world class team who designed and built the Simply Wall St analysis model.

Industry and Sector Metrics

Our industry and section metrics are calculated every 6 hours by Simply Wall St, details of our process are available on Github.

Analyst Sources

Tecogen Inc. is covered by 2 analysts. 3 of those analysts submitted the estimates of revenue or earnings used as inputs to our report. Analysts submissions are updated throughout the day.

Analyst	Institution
Robert Brooks	Northland Capital Markets
Alfred Moore	Roth Capital Partners