TGEN
TECOGEN INC.
Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig EquipNYSENon-accelerated filer<br>Smaller reporting company
Total Trades
78
Buys
77
Sells
1
Largest Trade
$100K–$500K
Insiders
5
Institutional Funds
51
Inst. Value
$1M+
Activist Filings
2
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| HATSOPOULOS JOHN | Director | BUY | $1K–$15K | 5K | $1.12 | Jun 12, 2023 |
| HATSOPOULOS JOHN | Director | BUY | <$1K | 500 | $1.09 | Jun 9, 2023 |
| HATSOPOULOS JOHN | Director | BUY | $1K–$15K | 10K | $1.00 | Jun 8, 2023 |
| HATSOPOULOS JOHN | Director | BUY | $1K–$15K | 7K | $1.00 | Jun 7, 2023 |
| HATSOPOULOS JOHN | Director | BUY | $1K–$15K | 1K | $1.14 | Jun 6, 2023 |
| HATSOPOULOS JOHN | Director | BUY | $1K–$15K | 1K | $1.09 | Jun 5, 2023 |
| HATSOPOULOS JOHN | Director | BUY | $1K–$15K | 1K | $1.17 | May 26, 2023 |
| HATSOPOULOS JOHN | Director | BUY | $1K–$15K | 2K | $1.17 | May 26, 2023 |
| HATSOPOULOS JOHN | Director | BUY | $1K–$15K | 4K | $1.00 | May 16, 2023 |
| LEWIS EARL R | Director | BUY | $1K–$15K | 10K | $0.96 | May 16, 2023 |
| LEWIS EARL R | Director | BUY | $15K–$50K | 35K | $1.09 | Mar 30, 2023 |
| HATSOPOULOS JOHN | Director | BUY | $15K–$50K | 18K | $1.00 | Mar 29, 2023 |
| HATSOPOULOS JOHN | Director | BUY | $1K–$15K | 11K | $1.00 | Mar 27, 2023 |
| Rangesh Abinand | CEO | BUY | $1K–$15K | 2K | $0.88 | Mar 27, 2023 |
| HATSOPOULOS JOHN | Director | BUY | $15K–$50K | 50K | $0.92 | Mar 24, 2023 |
| LEWIS EARL R | Director | BUY | $1K–$15K | 5K | $0.87 | Mar 23, 2023 |
| HATSOPOULOS JOHN | Director | BUY | $1K–$15K | 10K | $0.88 | Mar 21, 2023 |
| LEWIS EARL R | Director | BUY | $1K–$15K | 15K | $0.89 | Mar 21, 2023 |
| HATSOPOULOS JOHN | Director | BUY | $1K–$15K | 10K | $0.84 | Mar 21, 2023 |
| HATSOPOULOS JOHN | Director | BUY | $1K–$15K | 5K | $1.00 | Oct 19, 2022 |
| HATSOPOULOS JOHN | Director | BUY | $1K–$15K | 5K | $0.98 | Oct 18, 2022 |
| HATSOPOULOS JOHN | Director | BUY | $1K–$15K | 10K | $0.96 | Oct 12, 2022 |
| LEWIS EARL R | Director | BUY | $1K–$15K | 13K | $0.96 | Sep 29, 2022 |
| HATSOPOULOS JOHN | Director | BUY | $1K–$15K | 5K | $1.17 | Sep 12, 2022 |
| HATSOPOULOS JOHN | Director | BUY | $15K–$50K | 15K | $1.10 | Sep 2, 2022 |
| HATSOPOULOS JOHN | Director | BUY | $15K–$50K | 15K | $1.20 | Aug 30, 2022 |
| HATSOPOULOS JOHN | Director | BUY | $15K–$50K | 15K | $1.24 | Aug 25, 2022 |
| HATSOPOULOS JOHN | Director | BUY | $1K–$15K | 5K | $1.21 | Aug 23, 2022 |
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Institutional Ownership
13F filings as of Dec 31, 2025 · 51 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| BARD ASSOCIATES INC | 689K | $1M+ | SH |
| Clear Harbor Asset Management, LLC | 610K | $1M+ | SH |
| Portolan Capital Management, LLC | 446K | $1M+ | SH |
| HERALD INVESTMENT MANAGEMENT Ltd | 420K | $1M+ | SH |
| Palisades Investment Partners, LLC | 390K | $1M+ | SH |
| GENDELL JEFFREY L | 296K | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 141K | $500K+ | SH |
| NEW YORK STATE COMMON RETIREMENT FUND | 137K | $500K+ | SH |
| HighTower Advisors, LLC | 133K | $500K+ | SH |
| THOMPSON DAVIS & CO., INC. | 120K | $500K+ | SH |
| UBS Group AG | 102K | $500K+ | SH |
| RAYMOND JAMES FINANCIAL INC | 100K | $100K–$500K | SH |
| JANE STREET GROUP, LLC | 85K | $100K–$500K | SH |
| Point72 Asset Management, L.P. | 84K | $100K–$500K | SH |
| LPL Financial LLC | 74K | $100K–$500K | SH |
| STATE STREET CORP | 69K | $100K–$500K | SH |
| GOLDMAN SACHS GROUP INC | 68K | $100K–$500K | SH |
| PFG Investments, LLC | 63K | $100K–$500K | SH |
| GROUP ONE TRADING LLC | 57K | $100K–$500K | SH |
| RENAISSANCE TECHNOLOGIES LLC | 54K | $100K–$500K | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
Tryfon Natsis and Depoina Pantopoulou, as Joint Tenants with the Right of Survivorship
SC 13G/A · Aug 14, 2025
1.8%
460K shares
SC 13G · May 10, 2022
14.9%
3.7M shares