AMEX · TGEN

Tecogen Inc.

Industrials · Electrical Equipment & Parts

$2.97

Up+$0.08 (+2.69%)

Updated Sep 16, 2026, 3:24 PM

SID Score

4.2/10

Composite research score

Smart Money

—

Institutional and insider signal

Market cap: 192.51M
P/E ratio: -31.31
Dividend yield: 0.00%
52-week range: $1.94 – $7.43
Volume: 76.15K
Avg. volume: 740.51K

Price performance

TGEN price history

1M range · 20 trading sessions · Daily adjusted prices

Last close: $2.97
Period change: -15.14%
Period low: $2.95
Period high: $3.50

Daily close

View OHLC price history

TGEN OHLC price history, latest 40 sessions
Date	Open	High	Low	Close	Volume
Sep 15, 2026	$3.02	$3.0277	$2.9201	$2.97	76.15K
Sep 14, 2026	$2.97	$3.05	$2.91	$3.01	99.28K
Sep 11, 2026	$3.12	$3.175	$3.01	$3.05	88.38K
Sep 10, 2026	$3.04	$3.15	$3.0063	$3.03	84.88K
Sep 9, 2026	$3.16	$3.22	$3.08	$3.09	109.55K
Sep 8, 2026	$3.18	$3.35	$3.10	$3.23	229.46K
Sep 4, 2026	$3.05	$3.19	$3.01	$3.13	157.93K
Sep 3, 2026	$3.002	$3.06	$2.92	$3.05	152.16K
Sep 2, 2026	$2.97	$3.032	$2.91	$2.95	86.19K
Sep 1, 2026	$2.98	$3.04	$2.75	$3.01	432.1K
Aug 31, 2026	$3.11	$3.23	$3.00	$3.06	189.41K
Aug 28, 2026	$3.17	$3.18	$3.05	$3.11	113.63K
Aug 27, 2026	$3.16	$3.24	$3.11	$3.17	264.7K
Aug 26, 2026	$3.14	$3.285	$3.09	$3.13	100.1K
Aug 25, 2026	$3.09	$3.21	$3.045	$3.18	182.38K
Aug 24, 2026	$3.40	$3.40	$2.985	$3.11	321.83K
Aug 21, 2026	$3.25	$3.465	$3.25	$3.42	218.37K
Aug 20, 2026	$3.32	$3.418	$3.1316	$3.26	183.78K
Aug 19, 2026	$3.51	$3.59	$3.31	$3.36	173.4K
Aug 18, 2026	$3.50	$3.555	$3.32	$3.50	228.18K

Latest TGEN news

The latest Smart Investors Daily articles mentioning TGEN.

priceAug 13, 2026

Tecogen Inc. (TGEN) Surges 5.2% on Heavy Volume

priceJul 31, 2026

Tecogen Inc. (TGEN) Surges 5.0% on Heavy Volume

sec filingJul 2, 2026

TECOGEN INC. (TGEN) Reports Material Event to SEC

Latest TGEN news

The latest Smart Investors Daily articles mentioning TGEN.

Stock researchResearch & News · SEC Filings

Company

Overview Forecast Earnings Dividend Financials

Market Activity

Options Insider Trades Short Interest Institutional Ownership Sentiment

Research & News

Analysis Competitors News SEC Filings SID Coverage

TGEN research

SEC Filings

Recent regulatory filings and source documents.

SEC filing history

Open a filing to view the original source document.

TGEN SEC filings
Filed	Form	Description	Accepted	Document
Sep 8, 2026	4/A	Form 4/A - Statement of changes in beneficial ownership of securities: [Amend]	—	Open source
Sep 8, 2026	4/A	Form 4/A - Statement of changes in beneficial ownership of securities: [Amend]	—	Open source
Sep 8, 2026	4/A	Form 4/A - Statement of changes in beneficial ownership of securities: [Amend]	—	Open source
Sep 8, 2026	4/A	Form 4/A - Statement of changes in beneficial ownership of securities: [Amend]	—	Open source
Sep 8, 2026	4/A	Form 4/A - Statement of changes in beneficial ownership of securities: [Amend]	—	Open source
Aug 31, 2026	8-K	Form 8-K - Current report - Item 8.01 Item 9.01	—	Open source
Aug 13, 2026	10-Q	Form 10-Q - Quarterly report [Sections 13 or 15(d)]	—	Open source
Aug 12, 2026	8-K	Form 8-K - Current report - Item 2.02 Item 7.01 Item 9.01	—	Open source
Jul 1, 2026	8-K	Form 8-K - Current report - Item 5.02	—	Open source
Jun 30, 2026	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Jun 30, 2026	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Jun 30, 2026	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Jun 30, 2026	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Jun 30, 2026	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Jun 30, 2026	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Jun 30, 2026	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Jun 30, 2026	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Jun 30, 2026	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Jun 30, 2026	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Apr 27, 2026	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Apr 21, 2026	DEF 14A	Form DEF 14A - Other definitive proxy statements	—	Open source
Apr 8, 2026	8-K	Form 8-K - Current report - Item 8.01 Item 9.01	—	Open source
Mar 27, 2026	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Mar 27, 2026	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Mar 23, 2026	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Mar 23, 2026	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Mar 23, 2026	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Mar 23, 2026	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Mar 19, 2026	10-K	Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]	—	Open source
Mar 17, 2026	8-K	Form 8-K - Current report - Item 2.02 Item 7.01 Item 9.01	—	Open source
Nov 13, 2025	10-Q	Form 10-Q - Quarterly report [Sections 13 or 15(d)]	—	Open source
Nov 12, 2025	8-K	Form 8-K - Current report - Item 2.02 Item 7.01 Item 9.01	—	Open source
Sep 17, 2025	8-K	Form 8-K - Current report - Item 7.01 Item 9.01	—	Open source
Sep 4, 2025	8-K	Form 8-K - Current report - Item 8.01	—	Open source
Aug 13, 2025	10-Q	Form 10-Q - Quarterly report [Sections 13 or 15(d)]	—	Open source
Aug 12, 2025	8-K	Form 8-K - Current report - Item 2.02 Item 7.01 Item 9.01	—	Open source
Jul 28, 2025	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Jul 28, 2025	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Jul 28, 2025	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Jul 28, 2025	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Jul 28, 2025	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Jul 28, 2025	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Jul 28, 2025	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Jul 28, 2025	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Jul 28, 2025	4	Form 4 - Statement of changes in beneficial ownership of securities	—	Open source
Jul 28, 2025	8-K	Form 8-K - Current report - Item 5.02 Item 8.01 Item 9.01	—	Open source
Jul 21, 2025	8-K	Form 8-K - Current report - Item 8.01 Item 9.01	—	Open source
Jul 18, 2025	8-K	Form 8-K - Current report - Item 1.01 Item 8.01 Item 9.01	—	Open source
Jul 17, 2025	S-1MEF	Form S-1MEF - Registration adding securities to prior Form S-1 registration [Rule 462(b)]	—	Open source
Jul 16, 2025	S-1/A	Form S-1/A - General form for registration of securities under the Securities Act of 1933: [Amend]	—	Open source

Filed

Form

Description

Accepted

Document

Sep 8, 2026

4/A

Form 4/A - Statement of changes in beneficial ownership of securities: [Amend]

—

Open source

Sep 8, 2026

4/A

Form 4/A - Statement of changes in beneficial ownership of securities: [Amend]

—

Open source

Sep 8, 2026

4/A

Form 4/A - Statement of changes in beneficial ownership of securities: [Amend]

—

Open source

Sep 8, 2026

4/A

Form 4/A - Statement of changes in beneficial ownership of securities: [Amend]

—

Open source

Sep 8, 2026

4/A

Form 4/A - Statement of changes in beneficial ownership of securities: [Amend]

—

Open source

Aug 31, 2026

8-K

Form 8-K - Current report - Item 8.01 Item 9.01

—

Open source

Aug 13, 2026

10-Q

Form 10-Q - Quarterly report [Sections 13 or 15(d)]

—

Open source

Aug 12, 2026

8-K

Form 8-K - Current report - Item 2.02 Item 7.01 Item 9.01

—

Open source

Jul 1, 2026

8-K

Form 8-K - Current report - Item 5.02

—

Open source

Jun 30, 2026

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Jun 30, 2026

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Jun 30, 2026

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Jun 30, 2026

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Jun 30, 2026

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Jun 30, 2026

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Jun 30, 2026

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Jun 30, 2026

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Jun 30, 2026

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Jun 30, 2026

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Apr 27, 2026

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Apr 21, 2026

DEF 14A

Form DEF 14A - Other definitive proxy statements

—

Open source

Apr 8, 2026

8-K

Form 8-K - Current report - Item 8.01 Item 9.01

—

Open source

Mar 27, 2026

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Mar 27, 2026

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Mar 23, 2026

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Mar 23, 2026

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Mar 23, 2026

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Mar 23, 2026

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Mar 19, 2026

10-K

Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]

—

Open source

Mar 17, 2026

8-K

Form 8-K - Current report - Item 2.02 Item 7.01 Item 9.01

—

Open source

Nov 13, 2025

10-Q

Form 10-Q - Quarterly report [Sections 13 or 15(d)]

—

Open source

Nov 12, 2025

8-K

Form 8-K - Current report - Item 2.02 Item 7.01 Item 9.01

—

Open source

Sep 17, 2025

8-K

Form 8-K - Current report - Item 7.01 Item 9.01

—

Open source

Sep 4, 2025

8-K

Form 8-K - Current report - Item 8.01

—

Open source

Aug 13, 2025

10-Q

Form 10-Q - Quarterly report [Sections 13 or 15(d)]

—

Open source

Aug 12, 2025

8-K

Form 8-K - Current report - Item 2.02 Item 7.01 Item 9.01

—

Open source

Jul 28, 2025

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Jul 28, 2025

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Jul 28, 2025

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Jul 28, 2025

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Jul 28, 2025

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Jul 28, 2025

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Jul 28, 2025

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Jul 28, 2025

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Jul 28, 2025

Form 4 - Statement of changes in beneficial ownership of securities

—

Open source

Jul 28, 2025

8-K

Form 8-K - Current report - Item 5.02 Item 8.01 Item 9.01

—

Open source

Jul 21, 2025

8-K

Form 8-K - Current report - Item 8.01 Item 9.01

—

Open source

Jul 18, 2025

8-K

Form 8-K - Current report - Item 1.01 Item 8.01 Item 9.01

—

Open source

Jul 17, 2025

S-1MEF

Form S-1MEF - Registration adding securities to prior Form S-1 registration [Rule 462(b)]

—

Open source

Jul 16, 2025

S-1/A

Form S-1/A - General form for registration of securities under the Securities Act of 1933: [Amend]

—

Open source

Tecogen Inc. (TGEN) Surges 5.2% on Heavy Volume

Tecogen Inc. (TGEN) Surges 5.0% on Heavy Volume

TECOGEN INC. (TGEN) Reports Material Event to SEC

Featured By

Tecogen Inc. (TGEN) Surges 5.2% on Heavy Volume

Tecogen Inc. (TGEN) Surges 5.0% on Heavy Volume

TECOGEN INC. (TGEN) Reports Material Event to SEC