Stephen Lafaille - 24 Jul 2025 Form 4 Insider Report for TECOGEN INC. (TGEN)

Reporting relationship: VP of Business Development
Issuer ticker: TGEN
Reported as of: 24 Jul 2025
Net transaction value: +$201,026
SEC form: 4
Accepted by SEC: 28 Jul 2025, 11:12:02 UTC
Prior SEC filing: 24 Jun 2025
Next SEC filing: 30 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Stephen Lafaille

Key filing fact

Stephen Lafaille filed Form 4 for TECOGEN INC. (TGEN) on 28 Jul 2025.

Key facts

This page summarizes Stephen Lafaille's Form 4 filing for TECOGEN INC. (TGEN).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 28 Jul 2025, 11:12.

Change

Previous filing in this sequence was filed on 24 Jun 2025.
Current net transaction value: +$201,026.

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

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

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: 28 Jul 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

TGEN transaction

Common Stock

Award

Transaction value: $0
Shares: +11,976
Change %: +2994%
Price: $0.000000
Shares after: 12,376
Date: 24 Jul 2025
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

TGEN transaction Derivative

Stock Option (Right to Buy)

Award

Transaction value: $201,026
Shares: +24,075
Change %: +49%
Price: $8.35
Shares after: 72,937
Date: 24 Jul 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 24,075
Exercise price: $8.35
Footnotes: F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Restricted Stock Award, vests 25% per year

Footnote F2

Vests 25% per year

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