---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-25-021421"
form_type: "8-K"
ticker: "TGEN"
cik: "0001537435"
company_name: "TECOGEN INC."
filed_at: "2025-05-01T23:59:59+00:00"
generated_at: "2026-05-23T00:20:41.610686+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Tecogen approved for NYSE American listing; trading begins May 6 under TGEN

## Summary
- Shares approved for listing on NYSE American; expected to start trading May 6, 2025.
- Tecogen to trade under same symbol "TGEN" on NYSE American.
- Current OTCQX trading continues until close of business on or about May 5, 2025.
- No stockholder action required for the uplisting transition.
- CEO states uplisting expected to enhance visibility, investor base, and liquidity.

## SEC filing metadata
- accession: 0001628280-25-021421
- form_type: 8-K
- ticker: TGEN
- cik: 0001537435
- company_name: TECOGEN INC.
- filed_at: 2025-05-01T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1537435/000162828025021421/0001628280-25-021421-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1537435/000162828025021421/tgen-20250430.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-25-021421
- JSON: https://secwatch.observer/filing/0001628280-25-021421.json
- Plain text: https://secwatch.observer/filing/0001628280-25-021421.txt

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