# Tecogen Inc.: filings

TGEN · NYSE · CIK 1537435 · [Industrials](/sectors/industrials.md) · fiscal year ends Dec 31

Pages: [Overview](/companies/tgen.md) · [Financials](/companies/tgen/financials.md) · [Filings](/companies/tgen/filings.md) · [Insiders](/companies/tgen/insiders.md)

## Reports and events: 286 filings

Newest first, by EDGAR acceptance time (Eastern). Filter with ?form= one of: `periodic`, `8-K`, `10-K`, `10-Q`, `4`, `proxy`, `13dg`, `all`, or any form this company filed (8-K 186, 4 172, 10-Q 41, 3 41, CORRESP 26, UPLOAD 21, S-1/A 20, EFFECT 16, 10-K 14, 4/A 14, DEF 14A 11, SC 13G 10, SC 13G/A 10, 424B3 9, 425 9, DEFA14A 7, POS AM 7, 3/A 6, S-3/A 6, D 5, S-1 5, S-3 5, 8-K/A 4, DEF 14C 4, S-8 4, 5 3, 8-A12B 3, S-4/A 3, 424B4 2, CERTNAS 2, CT ORDER 2, PRE 14C 2, RW 2, SC 13D 2, SC 13D/A 2, 10-K/A 1, 25 1, 8-A12G 1, AW 1, CERT 1, DRS 1, PRE 14A 1, S-1MEF 1, S-4 1, S-8 POS 1, SCHEDULE 13G 1, SCHEDULE 13G/A 1).

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-10-14 | 16:02 ET | [8-K](/filings/0001537435-26-000092.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001537435-26-000092 |
| 2026-08-31 | 21:23 ET | [8-K](/filings/0001537435-26-000072.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001537435-26-000072 |
| 2026-08-31 | 21:22 ET | [S-1/A](/filings/0001537435-26-000071.md) | Registration statement, amended | 0001537435-26-000071 |
| 2026-08-13 | 17:59 ET | [10-Q](/filings/0001537435-26-000066.md) | Quarterly report, period 2026-06-30 | 0001537435-26-000066 |
| 2026-08-12 | 20:58 ET | [8-K](/filings/0001537435-26-000063.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001537435-26-000063 |
| 2026-07-01 | 13:15 ET | [8-K](/filings/0001537435-26-000053.md) | 5.02 Departure or appointment of officers or directors | 0001537435-26-000053 |
| 2026-06-05 | 20:01 ET | [8-K](/filings/0001537435-26-000040.md) | 5.07 Shareholder vote results | 0001537435-26-000040 |
| 2026-05-13 | 14:46 ET | [10-Q](/filings/0001537435-26-000038.md) | Quarterly report, period 2026-03-31 | 0001537435-26-000038 |
| 2026-05-12 | 21:15 ET | [8-K](/filings/0001537435-26-000036.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001537435-26-000036 |
| 2026-04-21 | 14:00 ET | [DEF 14A](/filings/0001537435-26-000029.md) | Proxy statement, period 2026-04-21 | 0001537435-26-000029 |
| 2026-04-08 | 21:00 ET | [8-K](/filings/0001537435-26-000027.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001537435-26-000027 |
| 2026-03-19 | 19:46 ET | [10-K](/filings/0001537435-26-000013.md) | Annual report, period 2025-12-31 | 0001537435-26-000013 |
| 2026-03-18 | 21:55 ET | [8-K](/filings/0001537435-26-000008.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001537435-26-000008 |
| 2026-01-07 | 22:58 ET | [8-K](/filings/0001537435-26-000003.md) | 7.01 Regulation FD disclosure | 0001537435-26-000003 |
| 2025-11-13 | 14:01 ET | [10-Q](/filings/0001537435-25-000143.md) | Quarterly report, period 2025-09-30 | 0001537435-25-000143 |
| 2025-11-12 | 22:05 ET | [8-K](/filings/0001537435-25-000141.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001537435-25-000141 |
| 2025-09-17 | 13:38 ET | [8-K](/filings/0001537435-25-000137.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001537435-25-000137 |
| 2025-09-04 | 20:52 ET | [8-K](/filings/0001537435-25-000134.md) | 8.01 Other events | 0001537435-25-000134 |
| 2025-08-13 | 13:00 ET | [10-Q](/filings/0001537435-25-000131.md) | Quarterly report, period 2025-06-30 | 0001537435-25-000131 |
| 2025-08-12 | 21:28 ET | [8-K](/filings/0001537435-25-000129.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001537435-25-000129 |
| 2025-07-28 | 14:27 ET | [8-K](/filings/0001537435-25-000111.md) | 5.02 Departure or appointment of officers or directors; 8.01 Other events; 9.01 Financial statements and exhibits | 0001537435-25-000111 |
| 2025-07-21 | 18:42 ET | [8-K](/filings/0001537435-25-000097.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001537435-25-000097 |
| 2025-07-18 | 12:28 ET | [8-K](/filings/0001537435-25-000092.md) | 1.01 Entry into a material agreement; 8.01 Other events; 9.01 Financial statements and exhibits | 0001537435-25-000092 |
| 2025-07-16 | 21:13 ET | [S-1/A](/filings/0001537435-25-000086.md) | Registration statement, amended | 0001537435-25-000086 |
| 2025-07-16 | 20:27 ET | [S-1/A](/filings/0001537435-25-000083.md) | Registration statement, amended | 0001537435-25-000083 |
| 2025-07-16 | 17:24 ET | [S-1/A](/filings/0001537435-25-000081.md) | Registration statement, amended | 0001537435-25-000081 |
| 2025-07-15 | 01:48 ET | [S-1](/filings/0001537435-25-000073.md) | Registration statement | 0001537435-25-000073 |
| 2025-06-10 | 20:37 ET | [8-K](/filings/0001537435-25-000056.md) | 5.07 Shareholder vote results | 0001537435-25-000056 |
| 2025-05-13 | 21:30 ET | [10-Q](/filings/0001537435-25-000037.md) | Quarterly report, period 2025-03-31 | 0001537435-25-000037 |
| 2025-05-12 | 21:04 ET | [8-K](/filings/0001537435-25-000034.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001537435-25-000034 |
| 2025-05-02 | 20:10 ET | [8-K](/filings/0001537435-25-000024.md) | 1.01 Entry into a material agreement | 0001537435-25-000024 |
| 2025-05-01 | 16:48 ET | [8-K](/filings/0001628280-25-021421.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001628280-25-021421 |
| 2025-04-29 | 13:27 ET | [DEF 14A](/filings/0001628280-25-020504.md) | Proxy statement, period 2025-04-29 | 0001628280-25-020504 |
| 2025-03-18 | 16:23 ET | [10-K](/filings/0001537435-25-000018.md) | Annual report, period 2024-12-31 | 0001537435-25-000018 |
| 2025-03-17 | 20:43 ET | [8-K](/filings/0001537435-25-000017.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001537435-25-000017 |
| 2025-03-11 | 22:02 ET | [8-K](/filings/0001537435-25-000014.md) | 5.02 Departure or appointment of officers or directors | 0001537435-25-000014 |
| 2025-03-03 | 14:27 ET | [8-K](/filings/0001537435-25-000012.md) | 1.01 Entry into a material agreement; 9.01 Financial statements and exhibits | 0001537435-25-000012 |
| 2025-02-19 | 22:28 ET | [8-K](/filings/0001537435-25-000008.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001537435-25-000008 |
| 2025-01-17 | 22:19 ET | [8-K](/filings/0001537435-25-000003.md) | 8.01 Other events | 0001537435-25-000003 |
| 2024-11-14 | 16:25 ET | [10-Q](/filings/0001537435-24-000121.md) | Quarterly report, period 2024-09-30 | 0001537435-24-000121 |
| 2024-11-14 | 23:07 ET | [8-K](/filings/0001537435-24-000119.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001537435-24-000119 |
| 2024-09-23 | 21:14 ET | [8-K](/filings/0001537435-24-000110.md) | 1.01 Entry into a material agreement | 0001537435-24-000110 |
| 2024-08-08 | 15:58 ET | [10-Q](/filings/0001537435-24-000106.md) | Quarterly report, period 2024-06-30 | 0001537435-24-000106 |
| 2024-08-08 | 12:40 ET | [8-K](/filings/0001537435-24-000104.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001537435-24-000104 |
| 2024-07-25 | 16:42 ET | [8-K](/filings/0001537435-24-000097.md) | 1.01 Entry into a material agreement | 0001537435-24-000097 |
| 2024-06-06 | 20:27 ET | [8-K](/filings/0001537435-24-000078.md) | 5.07 Shareholder vote results | 0001537435-24-000078 |
| 2024-05-09 | 17:42 ET | [10-Q](/filings/0001537435-24-000063.md) | Quarterly report, period 2024-03-31 | 0001537435-24-000063 |
| 2024-05-09 | 13:05 ET | [8-K](/filings/0001537435-24-000060.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001537435-24-000060 |
| 2024-05-03 | 20:03 ET | [8-K](/filings/0001537435-24-000054.md) | 1.01 Entry into a material agreement; 9.01 Financial statements and exhibits | 0001537435-24-000054 |
| 2024-04-23 | 15:11 ET | [DEF 14A](/filings/0001537435-24-000044.md) | Proxy statement, period 2024-04-23 | 0001537435-24-000044 |

Page 1 of 6. [Older](/companies/tgen/filings.md?page=2)
Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 24, 2026, 15:13 ET. No prices; not investment advice.