---
schema_version: "secwatch.filing_event.v1"
accession: "0001537435-24-000097"
form_type: "8-K"
ticker: "TGEN"
cik: "0001537435"
company_name: "TECOGEN INC."
filed_at: "2024-07-25T23:59:59+00:00"
generated_at: "2026-05-31T16:16:47.904295+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Tecogen borrows $500K from director/principal shareholder at 5.06% interest

## Summary
- Borrowed $500,000 from director and principal shareholder John N. Hatsopoulos.
- Promissory note matures in one year with a 5.06% interest rate.
- Terms governed by Note Subscription Agreement dated October 9, 2023, as amended.

## SEC filing metadata
- accession: 0001537435-24-000097
- form_type: 8-K
- ticker: TGEN
- cik: 0001537435
- company_name: TECOGEN INC.
- filed_at: 2024-07-25T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 1.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1537435/000153743524000097/0001537435-24-000097-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1537435/000153743524000097/tgen-20240723.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001537435-24-000097
- JSON: https://secwatch.observer/filing/0001537435-24-000097.json
- Plain text: https://secwatch.observer/filing/0001537435-24-000097.txt

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