---
schema_version: "secwatch.filing_event.v1"
accession: "0001537435-23-000090"
form_type: "8-K"
ticker: "TGEN"
cik: "0001537435"
company_name: "TECOGEN INC."
filed_at: "2023-07-24T23:59:59+00:00"
generated_at: "2026-06-13T04:12:28.638514+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Tecogen extends advisory agreement with John N. Hatsopoulos through March 2026

## Summary
- Advisory agreement term extended to March 28, 2026 via letter dated July 19, 2023.
- Board approved amendment by unanimous written consent on July 19, 2023.
- Company will reimburse Hatsopoulos for Medicare premiums up to employer's share of health plan costs.
- Original agreement dated Jan 3, 2018; prior amendment July 22, 2019.

## SEC filing metadata
- accession: 0001537435-23-000090
- form_type: 8-K
- ticker: TGEN
- cik: 0001537435
- company_name: TECOGEN INC.
- filed_at: 2023-07-24T23:59:59+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1537435/000153743523000090/0001537435-23-000090-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1537435/000153743523000090/tgen-20230719.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001537435-23-000090
- JSON: https://secwatch.observer/filing/0001537435-23-000090.json
- Plain text: https://secwatch.observer/filing/0001537435-23-000090.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.