# Tecogen Inc. (TGEN)

> Cited company facts from SEC filings, by Steadybase. Web page: https://steadybase.io/company/tecogen-inc/ JSON: https://steadybase.io/company/tecogen-inc.json Checked Nov 10, 2026. Latest filing read: Aug 31, 2026.

## Company

- Legal name: TECOGEN INC.
- Ticker: TGEN (NYSE)
- SEC CIK: 0001537435
- Industry: Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (SIC 3585)
- Headquarters: North Billerica, MA
- Fiscal year ends: December 31
- SEC filer category: Non-accelerated filer<br>Smaller reporting company
- Website: tecogen.com
- Investor relations: https://ir.tecogen.com
- LinkedIn: https://www.linkedin.com/company/tecogen
- Next earnings date: Nov 12, 2026

## Key facts

- Revenue: $27.1M for the fiscal year ended Dec 31, 2025 (10-K filed Mar 19, 2026). Source: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000013/0001537435-26-000013-index.html
- Operating income: -$8.2M for the fiscal year ended Dec 31, 2025 (10-K filed Mar 19, 2026). Source: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000013/0001537435-26-000013-index.html
- Net income: -$8.2M for the fiscal year ended Dec 31, 2025 (10-K filed Mar 19, 2026). Source: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000013/0001537435-26-000013-index.html
- SG&A: $13.5M for the fiscal year ended Dec 31, 2025 (10-K filed Mar 19, 2026). Source: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000013/0001537435-26-000013-index.html
- Employees: 119 as of Dec 31, 2025, as reported in an SEC filing. Source: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000013/tgen-20251231.htm
- Shares outstanding: 30,187,822 as of Aug 13, 2026 (10-Q filed Aug 13, 2026). Source: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000066/0001537435-26-000066-index.html
- Auditor: Wolf & Company, P.C., Boston, Massachusetts, named in the latest 10-K. Source: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000013/tgen-20251231.htm

## Business

, a Delaware corporation (together with its subsidiaries "we", "our", "us", "Tecogen," or "Company") produces commercial and industrial, natural-gas-fueled engine-driven, combined heat and power (CHP) products that reduce energy costs, decrease greenhouse gas emissions and alleviate congestion on the national power grid. Our products supply electric power or mechanical power for cooling, while heat from the engine is recovered and purposefully used at a customer facility.

Source: Item 1. Business, https://www.sec.gov/Archives/edgar/data/1537435/000153743526000013/tgen-20251231.htm

## Annual results

| Fiscal year ended | Revenue | Operating income | Net income | SG&A |
|---|---|---|---|---|
| Dec 31, 2025 | $27.1M | -$8.2M | -$8.2M | $13.5M |
| Dec 31, 2024 | $22.6M | -$4.5M | -$4.8M | $11.4M |
| Dec 31, 2023 | $25.1M | -$4.4M | -$4.6M | $11.9M |
| Dec 31, 2022 | $25.0M | -$2.3M | -$2.4M | $10.9M |
| Dec 31, 2021 | $24.4M | -$1.2M | $3.7M | $9.8M |

Each figure comes from the annual report for that year. Filing links for every figure: https://steadybase.io/company/tecogen-inc.json

## Officers and directors

- Abinand Rangesh, Chief Executive Officer. LinkedIn: https://linkedin.com/in/abinandrangesh. Source: 4/A filed Sep 8, 2026, https://www.sec.gov/Archives/edgar/data/1537435/000153743526000086/0001537435-26-000086-index.htm
- Roger P. Deschenes, Chief Financial Officer. Source: 4/A filed Sep 8, 2026, https://www.sec.gov/Archives/edgar/data/1537435/000153743526000087/0001537435-26-000087-index.htm
- Robert Panora, COO and President. LinkedIn: https://linkedin.com/in/robert-panora-53960229. Source: 4/A filed Sep 8, 2026, https://www.sec.gov/Archives/edgar/data/1537435/000158581426000003/0001585814-26-000003-index.htm
- John Kimball Whiting IV, General Counsel & Secretary. Source: 4/A filed Sep 8, 2026, https://www.sec.gov/Archives/edgar/data/1537435/000180819926000003/0001808199-26-000003-index.htm
- Angelina M. Galiteva, Director, Chairperson of the Board. Source: 10-K filed Mar 19, 2026, https://www.sec.gov/Archives/edgar/data/1537435/000153743526000013/tgen-20251231.htm
- Stephen Lafaille, VP of Business Development. Source: 4/A filed Sep 8, 2026, https://www.sec.gov/Archives/edgar/data/1537435/000153743526000088/0001537435-26-000088-index.htm
- Ahmed F. Ghoniem, Director. Source: 10-K filed Mar 19, 2026, https://www.sec.gov/Archives/edgar/data/1537435/000153743526000013/tgen-20251231.htm
- Earl R. Lewis III, Director. Source: 10-K filed Mar 19, 2026, https://www.sec.gov/Archives/edgar/data/1537435/000153743526000013/tgen-20251231.htm
- John M. Albertine, Director. Source: 10-K filed Mar 19, 2026, https://www.sec.gov/Archives/edgar/data/1537435/000153743526000013/tgen-20251231.htm
- John N. Hatsopoulos, Lead Director. Source: 10-K filed Mar 19, 2026, https://www.sec.gov/Archives/edgar/data/1537435/000153743526000013/tgen-20251231.htm
- Susan F. Hirsch, Director. Source: 10-K filed Mar 19, 2026, https://www.sec.gov/Archives/edgar/data/1537435/000153743526000013/tgen-20251231.htm

## Recent 8-K events

- Oct 14, 2026: Item 8.01, Other events; Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000092/tgen-20261014.htm
- Aug 31, 2026: Item 8.01, Other events; Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000072/tgen-20260831.htm
- Aug 12, 2026: Item 2.02, Results of operations and financial condition (earnings release); Item 7.01, Regulation FD disclosure; Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000063/tgen-20260812.htm
- Jul 1, 2026: Item 5.02, Departure or appointment of directors or officers; compensation. Source: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000053/tgen-20260626.htm
- Jun 5, 2026: Item 5.07, Submission of matters to a vote of security holders. Source: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000040/tgen-20260605.htm
- May 12, 2026: Item 2.02, Results of operations and financial condition (earnings release); Item 7.01, Regulation FD disclosure; Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000036/tgen-20260512.htm
- Apr 8, 2026: Item 8.01, Other events; Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000027/tgen-20260408.htm
- Mar 18, 2026: Item 2.02, Results of operations and financial condition (earnings release); Item 7.01, Regulation FD disclosure; Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000008/tgen-20260317.htm
- Jan 7, 2026: Item 7.01, Regulation FD disclosure. Source: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000003/tgen-20260106.htm
- Nov 12, 2025: Item 2.02, Results of operations and financial condition (earnings release); Item 7.01, Regulation FD disclosure; Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1537435/000153743525000141/tgen-20251112.htm

## Insider trades (Form 4)

- Apr 24, 2026: Ahmed Ghoniem (Director) bought 12,723 shares, about $10,051. Source: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000032/0001537435-26-000032-index.htm
- Apr 13, 2026: Susan B. Hirsch (Director) bought 5,000 shares, about $18,650. Source: https://www.sec.gov/Archives/edgar/data/1537435/000182766326000004/0001827663-26-000004-index.htm
- Mar 27, 2026: Susan B. Hirsch (Director) bought 10,000 shares, about $25,400. Source: https://www.sec.gov/Archives/edgar/data/1537435/000182766326000002/0001827663-26-000002-index.htm
- Mar 27, 2026: Earl Lewis (Director) bought 5,000 shares, about $12,600. Source: https://www.sec.gov/Archives/edgar/data/1537435/000123042726000002/0001230427-26-000002-index.htm
- Mar 26, 2026: Earl Lewis (Director) bought 5,000 shares, about $14,400. Source: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000024/0001537435-26-000024-index.htm
- Mar 23, 2026: John Kimball Whiting IV (General Counsel & Secretary) bought 10,000 shares, about $23,800. Source: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000021/0001537435-26-000021-index.htm
- Mar 20, 2026: Roger P. Deschenes (CAO) bought 10,000 shares, about $22,300. Source: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000020/0001537435-26-000020-index.htm
- Mar 20, 2026: Abinand Rangesh (Chief Executive Officer) bought 3,000 shares, about $6,900. Source: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000019/0001537435-26-000019-index.htm

## Latest filings

- 8-K filed Oct 14, 2026: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000092/tgen-20261014.htm
- 10-K filed Mar 19, 2026: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000013/tgen-20251231.htm
- 10-Q filed Aug 13, 2026: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000066/tgen-20260630.htm
- DEF 14A filed Apr 21, 2026: https://www.sec.gov/Archives/edgar/data/1537435/000153743526000029/tgen-20260417.htm

## About this data

SEC EDGAR filings, read by Steadybase. Every value links to the filing it came from.
Steadybase covers US-headquartered public companies that file with the SEC. API and MCP access: https://steadybase.io/docs/