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TGENNYSE
TECOGEN INC.
Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip · DE · CIK 1537435
Tecogen designs, manufactures, and sells natural-gas-fueled combined heat and power products and services
$171M
Market cap
$5.23
Last close
+1.2%
1D
-13.6%
5D
152K
Volume
Price · last 39 sessions+6.3%
May 4L $4.23 · H $6.90Jun 29
307
Total filings
Jun 5, 2026
Last filing
12/31
Fiscal year end
8-KShareholder VoteJun 5, 202610-Q10-QMay 13, 20268-KResults of Operations · Reg FD DisclosureMay 12, 2026DEF 14ADEF 14AApr 21, 20268-KCompany UpdateApr 8, 202610-K10-KMar 19, 20268-KResults of Operations · Reg FD DisclosureMar 18, 20268-KReg FD DisclosureJan 7, 202610-Q10-QNov 13, 20258-KResults of Operations · Reg FD DisclosureNov 12, 20258-KReg FD DisclosureSep 17, 20258-KCompany UpdateSep 4, 202510-Q10-QAug 13, 20258-KResults of Operations · Reg FD DisclosureAug 12, 20258-KExecutive Change · Company UpdateJul 28, 20258-KCompany UpdateJul 21, 2025424B4424B4Jul 21, 20258-KMaterial Agreement · Company UpdateJul 18, 2025S-1/AS-1/AJul 16, 2025S-1/AS-1/AJul 16, 2025S-1/AS-1/AJul 16, 2025S-1S-1Jul 15, 20258-KShareholder VoteJun 10, 202510-Q10-QMay 13, 20258-KResults of Operations · Reg FD DisclosureMay 12, 20258-KMaterial AgreementMay 2, 20258-KReg FD DisclosureMay 1, 2025DEF 14ADEF 14AApr 29, 202510-K10-KMar 18, 20258-KResults of Operations · Reg FD DisclosureMar 17, 20258-KExecutive ChangeMar 11, 20258-KMaterial AgreementMar 3, 20258-KCompany UpdateFeb 19, 20258-KCompany UpdateJan 17, 202510-Q10-QNov 14, 20248-KResults of Operations · Reg FD DisclosureNov 14, 20248-KMaterial AgreementSep 23, 202410-Q10-QAug 8, 20248-KResults of Operations · Reg FD DisclosureAug 8, 20248-KMaterial AgreementJul 25, 20248-KShareholder VoteJun 6, 202410-Q10-QMay 9, 20248-KResults of Operations · Reg FD DisclosureMay 9, 20248-KMaterial AgreementMay 3, 2024DEF 14ADEF 14AApr 23, 202410-K10-KMar 25, 20248-KResults of Operations · Reg FD DisclosureMar 14, 20248-KExecutive ChangeMar 7, 20248-KMaterial AgreementFeb 5, 20248-KReg FD DisclosureJan 16, 20248-KExecutive ChangeDec 14, 202310-Q10-QNov 9, 20238-KResults of Operations · Reg FD DisclosureNov 8, 20238-KMaterial Agreement · Reg FD DisclosureOct 10, 20238-KExecutive ChangeSep 26, 202310-Q10-QAug 10, 20238-KResults of Operations · Reg FD DisclosureAug 9, 20238-KCompany UpdateJul 24, 20238-KShareholder VoteJun 8, 202310-Q10-QMay 11, 20238-KResults of Operations · Reg FD DisclosureMay 11, 20238-KCompany UpdateMay 3, 2023DEF 14ADEF 14AApr 25, 202310-K10-KMar 23, 20238-KMaterial Agreement · Results of OperationsMar 16, 20238-KExecutive ChangeJan 30, 20238-KExecutive ChangeDec 8, 202210-Q10-QNov 10, 20228-KResults of Operations · Reg FD DisclosureNov 10, 20228-KExecutive ChangeSep 21, 202210-Q10-QAug 11, 20228-KResults of Operations · Reg FD DisclosureAug 11, 20228-KCompany UpdateJul 20, 20228-KReg FD DisclosureJun 15, 20228-KShareholder VoteJun 10, 202210-Q10-QMay 12, 20228-KResults of Operations · Reg FD DisclosureMay 12, 2022SC 13GSC 13GMay 10, 2022DEF 14ADEF 14AApr 25, 20228-KReg FD DisclosureMar 22, 2022
Insider Activity
◆ Cluster Buy · 5 insidersIn the 90 days to Mar 27, 2026: 5 insiders bought $105K.
| Date | Insider | Action | Shares | Price | Value |
|---|---|---|---|---|---|
| Mar 27, 2026 | Hirsch Susan BDirector | Buy | 10,000 | $2.54 | $25K |
| Mar 27, 2026 | Lewis EarlDirector | Buy | 5,000 | $2.52 | $13K |
| Mar 26, 2026 | Lewis EarlDirector | Buy | 5,000 | $2.88 | $14K |
| Mar 23, 2026 | Whiting John Kimball IvGeneral Counsel & Secretary | Buy | 10,000 | $2.38 | $24K |
| Mar 20, 2026 | Deschenes Roger P.CAO | Buy | 10,000 | $2.23 | $22K |
| Mar 20, 2026 | Rangesh AbinandChief Executive Officer | Buy | 3,000 | $2.30 | $7K |
Open-market buys & sells (Form 4, transaction codes P/S). Source: SEC structured insider data.
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