Tecogen, Inc.

Historical 13F Holders

Symbol
TGEN
CUSIP
87876P201
All holders as of
Q2 2026
Type
Equity
Class
COM NEW
Reported Value, Excluding Options
Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Each filer's latest filing for 87876P201 since 12/18/2024, largest first.

Filer % of Class Filed
Portolan Capital Management, LLC 13G
5.2% 6/10/2026
Event 6/3/2026
Under 5%, checked the "5 percent or less" box, or amended by a later filing (1)
Natsis Tryfon 13G/A 1.8% 8/14/2025
Event 6/30/2025

13F Holders by Quarter

Period Filings Shares, Excl. Options Value, Excl. Options
2026 Q3 1 181 $514.00
2026 Q2 77 9.48 M $49.5 M
2026 Q1 68 7.79 M $19.9 M
2025 Q4 73 7.62 M $37.6 M
2025 Q3 80 7.73 M $68.0 M
2025 Q2 32 3.92 M $26.8 M
2025 Q1 1 12.5 k $28.0 k
2023 Q4 1 321 k $260 k
2023 Q3 1 321 k $273 k
2023 Q2 1 321 k $321 k
2023 Q1 1 321 k $381 k
2022 Q4 1 321 k $401 k
2022 Q3 1 321 k $304 k
2022 Q2 1 321 k $362 k
2022 Q1 1 321 k $529 k
2021 Q4 2 331 k $397 k
2021 Q3 1 321 k $581 k
2021 Q2 1 321 k $600 k
2021 Q1 1 321 k $545 k
2020 Q4 1 321 k $391 k
2020 Q3 1 321 k $292 k
2020 Q2 3 416 k $291 k
2020 Q1 25 3.59 M $3.33 M
2019 Q4 24 3.87 M $8.57 M
2019 Q3 26 4.01 M $9.51 M
2019 Q2 21 4.09 M $15.2 M
2019 Q1 25 4.01 M $16.0 M
2018 Q4 21 3.53 M $12.8 M
2018 Q3 20 3.20 M $10.4 M
2018 Q2 18 3.19 M $11.8 M
2018 Q1 18 2.57 M $7.35 M
2017 Q4 16 2.48 M $6.67 M
2017 Q3 15 2.44 M $7.79 M
2017 Q2 12 2.24 M $7.42 M
2017 Q1 12 2.02 M $7.67 M
2016 Q4 9 1.73 M $7.27 M
2016 Q3 11 1.76 M $7.33 M
2016 Q2 7 2.38 M $12.2 M
2016 Q1 12 2.84 M $11.1 M
2015 Q4 11 2.29 M $8.03 M
2015 Q3 11 2.40 M $8.27 M
2015 Q2 14 2.40 M $9.86 M
2015 Q1 12 2.40 M $12.2 M
2014 Q4 13 2.32 M $12.1 M
2014 Q3 10 1.48 M $8.59 M
2014 Q2 9 801 k $6.40 M