---
schema_version: "secwatch.filing_event.v1"
accession: "0001537435-26-000008"
form_type: "8-K"
ticker: "TGEN"
cik: "0001537435"
company_name: "TECOGEN INC."
filed_at: "2026-03-18T23:59:59+00:00"
generated_at: "2026-05-15T09:51:17.199338+00:00"
event_type: "earnings"
sentiment: "negative"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Tecogen FY2025 revenue $27.1M (+20% YoY); net loss widens to $8.25M from $4.76M

## Summary
- FY2025 revenue $27.07M (19.7% increase); net loss $8.25M ($0.30/share) vs $4.76M loss in 2024.
- Q4 revenue $5.32M (down 12.5% YoY); Q4 net loss $3.99M ($0.13/share) vs $1.19M loss.
- Cash used in operations $9.91M; ended year with $12.43M cash after $17.4M July follow-on.
- Gross margin fell to 36.3% (FY) from 43.6%; operating expenses rose 25.4% including $1.11M goodwill impairment.
- CEO cites positive updates on Vertiv pipeline, data center opportunities, and upcoming pilot project despite loss.

## SEC filing metadata
- accession: 0001537435-26-000008
- form_type: 8-K
- ticker: TGEN
- cik: 0001537435
- company_name: TECOGEN INC.
- filed_at: 2026-03-18T23:59:59+00:00
- event_type: earnings
- sentiment: negative
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 2.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000008/0001537435-26-000008-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000008/tgen-20260317.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001537435-26-000008
- JSON: https://secwatch.observer/filing/0001537435-26-000008.json
- Plain text: https://secwatch.observer/filing/0001537435-26-000008.txt

## Key facts
- Earnings Releases
  TECOGEN INC. reported three and twelve months ended December 31, 2025 results: revenue $27.07 million, net income net loss of $8.25 million.
  - Period: three and twelve months ended December 31, 2025
  - Revenue: $27.07 million
  - Net income: net loss of $8.25 million
  - Result: reported results
  source text: source chiller and marketing." NORTH BILLERICA, Mass., March 17, 2026 - Tecogen Inc. (NYSE American:TGEN), a leading manufacturer of clean energy products, reported revenues of $27.07 million and net loss of $8.25 million for the year December 31, 2025 compared to $22.62 million and net loss of $4.76 million for the same period in 2024, an increase in revenues of
  evidence_url: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000008/0001537435-26-000008-index.htm

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