Key facts
- This page summarizes Stephen Lafaille's Form 4/A - Amendment filing for TECOGEN INC. (TGEN).
- 1 reported transaction and 0 derivative rows are listed below.
- Accepted by SEC: 08 Sep 2026, 17:12.
Stephen Lafaille - 26 Jun 2026 Form 4/A - Amendment Insider Report for TECOGEN INC. (TGEN)
- Reporting relationship
- VP of Business Development
- Issuer ticker
- TGEN
- Reported as of
- 26 Jun 2026
- Net transaction value
- $0
- SEC form
- 4/A - Amendment
- Accepted by SEC
- 08 Sep 2026, 17:12:11 UTC
- Original report date
- 30 Jun 2026
- Prior SEC filing
- 28 Jul 2025
- Source filing
- View source filing
- Reporting owner signature
- /s/ Stephen Lafaille
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
Stephen Lafaille filed Form 4/A - Amendment for TECOGEN INC. (TGEN) on 08 Sep 2026.
Change
- Previous filing in this sequence was filed on 28 Jul 2025.
- Current net transaction value: $0.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4/A - Amendment disclosures.
Reporting Owners (1)
CIK 0002074096
Primary reporting owner
Lafaille Stephen
- Relationship
- VP of Business Development
- Address
- 76 TREBLE COVE ROAD, NORTH BILLERICA
- Signature
- /s/ Stephen Lafaille
- Signature date
- 08 Sep 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
TGEN
transaction
Common Stock
Award
- Transaction value
- Shares
- +29,013
- Change %
- +234%
- Price
- $0.000000*
- Shares after
- 41,389
- Date
- 26 Jun 2026
- Ownership
- Direct
- Footnotes
- F1, F2, F3
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 3 footnotes
Footnote F1
Restricted stock award pursuant to Tecogen Inc. 2022 Stock Incentive Plan. Restrictions lapse 25% per year.
Footnote F2
Not applicable
Footnote F3
Corrected number of shares beneficially owned following restricted stock grant previously reported on Form 4 on June 30, 2026.
SEC remarks
Filed to amend Form 4 filed by Reporting Person on June 30, 2026.