TGENNYSEAir-Cond & Warm Air Heatg Equip & Comm & Indl Refrig EquipFiscal year ends December 31
TECOGEN INC.
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 13, 2026
$2.12+0.03 (+1.44%)
Close on Oct 19, 2026
- Market cap
- $63.60M
- P/E (TTM)
- –
- Dividend yield
- –
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
31.4%
9M of 30M shares
Institutional holders
69
20 new, 13 sold out
Net institutional buying
2M
In Q2 2026
Insider trades, 12 months
8 buys · 0 sales
Net bought $134.10K
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| Portolan Capital Management, LLC | 1,552,232 | 5.19% | 13G (passive) | Jun 3, 2026 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of TGEN | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| Portolan Capital Management, LLC | 1,551,113 | 5.14% | $8.10M | +1,107,558 | 0.30% |
| Vanguard Capital Management LLC | 788,670 | 2.61% | $4.12M | +18,706 | 0.00% |
| Bard Associates Inc | 682,221 | 2.26% | $3.56M | −6,088 | 0.79% |
| Clear Harbor Asset Management, LLC | 650,000 | 2.15% | $3.39M | – | 0.21% |
| Herald Investment Management Ltd | 420,000 | 1.39% | $2.19M | – | 0.30% |
| Gratia Capital, LLC | 388,660 | 1.29% | $2.03M | New | 1.23% |
| UBS Group AG | 363,049 | 1.20% | $1.90M | +43,213 | 0.00% |
| Meros Investment Management, LP | 353,487 | 1.17% | $1.85M | +61,782 | 0.59% |
| Palisades Investment Partners, LLC | 323,090 | 1.07% | $1.69M | −10,817 | 0.48% |
| Susquehanna International Group, Llp | 315,831 | 1.05% | $1.65M | +206,374 | 0.00% |
| Morgan Stanley | 301,695 | 1.00% | $1.57M | +224,959 | 0.00% |
| Raymond James Financial Inc | 290,260 | 0.96% | $1.52M | +104,466 | 0.00% |
| BlackRock, Inc. | 251,464 | 0.83% | $1.31M | +66,685 | 0.00% |
| Citadel Advisors LLC | 242,276 | 0.80% | $1.26M | +94,804 | 0.00% |
| Huntleigh Advisors, Inc. | 220,074 | 0.73% | $1.15M | New | 0.16% |
| Heartland Advisors Inc | 182,100 | 0.60% | $950.56K | New | 0.04% |
| Geode Capital Management, LLC | 180,870 | 0.60% | $944.80K | −11,132 | 0.00% |
| Thompson Davis & Co., Inc. | 144,840 | 0.48% | $755.86K | +45,840 | 0.45% |
| New York State Common Retirement Fund | 137,200 | 0.45% | $716.18K | – | 0.00% |
| Gsa Capital Partners Llp | 126,451 | 0.42% | $660 | +32,281 | 0.04% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 69 | 9M | 31.4% | 20 / 18 | 15 / 13 | 3M | 2M |
| Q1 2026 | 62 | 8M | 25.8% | 15 / 16 | 19 / 17 | 2M | 1M |
| Q4 2025 | 65 | 8M | 25.2% | 15 / 23 | 17 / 19 | 1M | 1M |
| Q3 2025 | 70 | 8M | 25.6% | 42 / 15 | 6 / 2 | 4M | 0M |
| Q2 2025 | 30 | 4M | 13.0% | 29 / 1 | 0 / 0 | 4M | 0M |
| Q1 2025 | 1 | 0M | 0.0% | 1 / 0 | 0 / 0 | 0M | 0M |
| Q1 2024 | 0 | 0M | 0.0% | 0 / 0 | 0 / 1 | 0M | 0M |
| Q4 2023 | 1 | 0M | 1.1% | 0 / 0 | 0 / 0 | 0M | 0M |
| Q3 2023 | 1 | 0M | 1.1% | 0 / 0 | 0 / 0 | 0M | 0M |
| Q2 2023 | 1 | 0M | 1.1% | 0 / 0 | 0 / 0 | 0M | 0M |
| Q1 2023 | 1 | 0M | 1.1% | 0 / 0 | 0 / 0 | 0M | 0M |
| Q4 2022 | 1 | 0M | 1.1% | 0 / 0 | 0 / 0 | 0M | 0M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
| Fund | Shares | % of TGEN | Value | % of fund | As of |
|---|---|---|---|---|---|
| Strategic Advisers U.S. Total Stock Fund | 748,390 | 2.48% | $4.65M | 0.00% | May 31, 2026 |
| Vanguard Total Stock Market Index Fund | 579,798 | 1.92% | $3.03M | 0.00% | Jun 30, 2026 |
| Vanguard Extended Market Index Fund | 189,154 | 0.63% | $987.38K | 0.00% | Jun 30, 2026 |
| Fidelity Extended Market Index Fund | 87,813 | 0.29% | $545.32K | 0.00% | May 31, 2026 |
| iShares Micro-Cap ETF | 62,527 | 0.21% | $326.39K | 0.02% | Jun 30, 2026 |
| Goldman Sachs Absolute Return Tracker Fund | 46,949 | 0.16% | $245.07K | 0.00% | Jun 30, 2026 |
| Ultra-Small Company Market Fund | 33,048 | 0.11% | $172.51K | 0.12% | Jun 30, 2026 |
| Fidelity Total Market Index Fund | 28,880 | 0.10% | $179.34K | 0.00% | May 31, 2026 |
| Acuitas US Microcap Fund | 25,834 | 0.09% | $134.85K | 0.11% | Jun 30, 2026 |
| Fidelity Series Total Market Index Fund | 25,754 | 0.09% | $159.93K | 0.00% | May 31, 2026 |
| Gabelli Global Mini Mites Fund | 20,000 | 0.07% | $104.40K | 0.39% | Jun 30, 2026 |
| Vanguard Balanced Index Fund | 11,037 | 0.04% | $57.61K | 0.00% | Jun 30, 2026 |
| Vanguard Institutional Total Stock Market Index Fund | 8,681 | 0.03% | $45.31K | 0.00% | Jun 30, 2026 |
| Dimensional U.S. Small Cap ETF | 5,837 | 0.02% | $19.38K | 0.00% | Jul 31, 2026 |
| U.S. Core Equity 1 Portfolio | 5,324 | 0.02% | $17.68K | 0.00% | Jul 31, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| Abinand Rangesh | Chief Executive Officer, Director | 241,274 | 0.80% | Sep 8, 2026 |
| John Kimball Whiting IV | General Counsel & Secretary | 41,954 | 0.14% | Sep 8, 2026 |
| Robert Panora | COO and President | 72,194 | 0.24% | Sep 8, 2026 |
| Roger P. Deschenes | Chief Financial Officer | 81,975 | 0.27% | Sep 8, 2026 |
| Stephen Lafaille | VP of Business Development | 41,389 | 0.14% | Sep 8, 2026 |
| Ahmed Ghoniem | Director | 12,723 | 0.04% | Jun 30, 2026 |
| Susan B. Hirsch | Director | 265,416 | 0.88% | Jun 30, 2026 |
| John M. Albertine | Director | – | – | Jun 30, 2026 |
| Earl Lewis | Director | 1,646,006 | 5.45% | Jun 30, 2026 |
| Angelina Galiteva | Director | 50,000 | 0.17% | Jun 30, 2026 |
| John Hatsopoulos | Director | 1,114,513 | 3.69% | Mar 23, 2026 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Stephen Lafaille VP of Business Development | Jun 26, 2026 | Award | +29,013 | – | – | 41,389 |
| Roger P. Deschenes Chief Financial Officer | Jun 26, 2026 | Award | +29,013 | – | – | 81,975 |
| Robert Panora COO and President | Jun 26, 2026 | Award | +9,671 | – | – | 72,194 |
| John Kimball Whiting IV General Counsel & Secretary | Jun 26, 2026 | Award | +19,342 | – | – | 41,954 |
| Abinand Rangesh Chief Executive Officer, Director | Jun 26, 2026 | Award | +174,081 | – | – | 241,274 |
| Abinand Rangesh Chief Executive Officer, Director | Jun 26, 2026 | Award | +174,081 | – | – | 174,081 |
| Stephen Lafaille VP of Business Development | Jun 26, 2026 | Award | +29,013 | – | – | 29,013 |
| John Kimball Whiting IV General Counsel & Secretary | Jun 26, 2026 | Award | +19,342 | – | – | 19,342 |
| Roger P. Deschenes CAO | Jun 26, 2026 | Award | +29,013 | – | – | 29,013 |
| Robert Panora COO and President | Jun 26, 2026 | Award | +9,671 | – | – | 9,671 |
| Ahmed Ghoniem Director | Apr 24, 2026 | Buy | +12,723 | $0.79 | $10.05K | 12,723 |
| Susan B. Hirsch Director | Apr 13, 2026 | Buy | +5,000 | $3.73 | $18.65K | 265,416 |
| Earl Lewis Director | Mar 27, 2026 | Buy | +5,000 | $2.52 | $12.60K | 1,011,006 |
| Susan B. Hirsch Director | Mar 27, 2026 | Buy | +10,000 | $2.54 | $25.40K | 260,416 |
| Earl Lewis Director | Mar 26, 2026 | Buy | +5,000 | $2.88 | $14.40K | 1,006,006 |
| John Kimball Whiting IV General Counsel & Secretary | Mar 23, 2026 | Buy | +10,000 | $2.38 | $23.80K | 22,612 |
| Abinand Rangesh Chief Executive Officer, Director | Mar 20, 2026 | Buy | +3,000 | $2.30 | $6.90K | 67,193 |
| Roger P. Deschenes CAO | Mar 20, 2026 | Buy | +10,000 | $2.23 | $22.30K | 52,962 |
| John Hatsopoulos Director | Mar 20, 2026 | Option exercise | +50,000 | $0.88 | $44.00K | 1,038,951 |
| Stephen Lafaille VP of Business Development | Jul 24, 2025 | Award | +11,976 | – | – | 12,376 |
| John Kimball Whiting IV General Counsel & Secretary | Jul 24, 2025 | Award | +11,976 | – | – | 12,612 |
| Roger P. Deschenes CAO | Jul 24, 2025 | Award | +17,964 | – | – | 42,962 |
| Abinand Rangesh Chief Executive Officer, Director | Jul 24, 2025 | Award | +53,892 | – | – | 64,193 |
| Robert Panora COO and President | Jun 24, 2025 | Sale | −900 | $6.86 | $6.17K | 62,523 |
| Robert Panora COO and President | Jun 23, 2025 | Sale | −31,800 | $6.36 | $202.25K | 63,423 |
| Stephen Lafaille VP of Business Development | Jun 23, 2025 | Option exercise | +10,000 | $1.10 | $11.00K | 10,400 |
| Stephen Lafaille VP of Business Development | Jun 23, 2025 | Sale | −10,000 | $7.25 | $72.50K | 400 |
| Robert Panora COO and President | Jun 18, 2025 | Sale | −13,000 | $5.03 | $65.39K | 95,223 |
| Robert Panora COO and President | Jun 16, 2025 | Option exercise | +52,500 | $1.10 | $57.75K | 108,223 |
| Robert Panora COO and President | Jun 16, 2025 | Option exercise | +30,000 | $0.71 | $21.30K | 55,723 |
| Robert Panora COO and President | Jun 16, 2025 | Option exercise | +12,723 | $0.79 | $10.05K | 25,723 |
| Robert Panora COO and President | Jun 16, 2025 | Option exercise | +12,723 | $0.79 | $10.05K | 82,723 |
| Robert Panora COO and President | Jun 16, 2025 | Option exercise | +52,500 | $1.10 | $57.75K | 165,223 |
| Robert Panora COO and President | Jun 16, 2025 | Option exercise | +30,000 | $0.71 | $21.30K | 112,723 |
| Stephen Lafaille VP of Business Development | Jun 6, 2025 | Sale | −25,000 | $5.98 | $149.50K | 400 |
| Stephen Lafaille VP of Business Development | Jun 6, 2025 | Option exercise | +25,000 | $1.10 | $27.50K | 25,400 |
| Robert Panora COO and President | Jun 4, 2025 | Sale | −31,000 | $5.00 | $155.00K | 13,000 |
| Stephen Lafaille VP of Business Development | Jun 4, 2025 | Sale | −15,000 | $5.00 | $75.00K | 400 |
| Stephen Lafaille VP of Business Development | Jun 4, 2025 | Option exercise | +15,000 | $0.71 | $10.65K | 15,400 |
| Robert Panora COO and President | Jun 3, 2025 | Sale | −26,000 | $4.69 | $121.94K | 44,000 |
| Stephen Lafaille VP of Business Development | Jun 3, 2025 | Sale | −10,000 | $4.88 | $48.80K | 400 |
| Stephen Lafaille VP of Business Development | Jun 3, 2025 | Option exercise | +10,000 | $0.71 | $7.10K | 10,400 |
| Robert Panora COO and President | May 27, 2025 | Option exercise | +70,000 | $0.71 | $49.70K | 70,000 |
| Earl Lewis Director | May 6, 2025 | Option exercise | +6,250 | $1.10 | $6.88K | 1,001,006 |
| Earl Lewis Director | May 6, 2025 | Option exercise | +15,000 | $1.75 | $26.25K | 982,256 |
| Earl Lewis Director | May 6, 2025 | Option exercise | +12,500 | $1.20 | $15.00K | 994,756 |
| Earl Lewis Director | May 1, 2025 | Other | +240,256 | $2.14 | $514.15K | 967,256 |
| Stephen Lafaille VP of Business Development | Mar 3, 2025 | Buy | +400 | $2.50 | $1.00K | 400 |
| Earl Lewis Director | Nov 22, 2024 | Option exercise | +100,000 | $0.71 | $71.00K | 727,000 |
| Earl Lewis Director | Nov 22, 2024 | Buy | +100,000 | $0.71 | $71.00K | 737,000 |
| John Hatsopoulos Director | Sep 27, 2024 | Buy | +10,000 | $0.84 | $8.40K | 988,951 |
| John Hatsopoulos Director | Sep 25, 2024 | Buy | +10,000 | $0.86 | $8.60K | 978,951 |
| John Hatsopoulos Director | Aug 19, 2024 | Buy | +10,000 | $0.90 | $9.00K | 968,951 |
| Earl Lewis Director | Jul 15, 2024 | Buy | +10,000 | $0.68 | $6.80K | 625,000 |
| Earl Lewis Director | Jul 15, 2024 | Buy | +10,000 | $0.68 | $6.80K | 635,000 |
| Earl Lewis Director | Jul 15, 2024 | Buy | +10,000 | $0.68 | $6.80K | 625,000 |
| John Hatsopoulos Director | Jul 10, 2024 | Buy | +22,466 | $0.65 | $14.60K | 958,951 |
| John Hatsopoulos Director | May 29, 2024 | Buy | +10,000 | $0.80 | $8.00K | 935,220 |
| John Hatsopoulos Director | May 28, 2024 | Buy | +1,265 | $0.80 | $1.01K | 936,485 |
| John Hatsopoulos Director | May 24, 2024 | Buy | +8,735 | $0.80 | $6.99K | 925,220 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.