TECOGEN INC. - Common Stock, $0.001 par value (TGEN) Institutional Ownership

13F Institutional Holders and Ownership History from Q2 2014 to Q4 2025

Type / Class
Equity / Common Stock, $0.001 par value
Symbol
TGEN on NYSE
Shares outstanding
25,572,222
Price per share
$4.94
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares
7,727,290
Total reported value
$68,035,883
% of total 13F portfolios
0%
Share change
+3,862,438
Value change
+$34,021,652
Number of holders
70
Price from insider filings
$4.94
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of TECOGEN INC. - Common Stock, $0.001 par value (TGEN) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
Natsis Tryfon 1.8% $3,650,179 460,300 Tryfon Natsis and Depoina Pantopoulou, as Joint Tenants with the Right of Survivorship 30 Jun 2025

As of 30 Sep 2025, 70 institutional investors reported holding 7,727,290 shares of TECOGEN INC. - Common Stock, $0.001 par value (TGEN). This represents 30% of the company’s total 25,572,222 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of TECOGEN INC. - Common Stock, $0.001 par value (TGEN) together control 26% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
VANGUARD GROUP INC 3.4% 870,440 +5.4% 0% $7,668,577
BARD ASSOCIATES INC 2.7% 690,611 +11% 1.6% $6,084,283
Clear Harbor Asset Management, LLC 2.4% 611,600 +0.26% 0.38% $5,388,196
Portolan Capital Management, LLC 2.3% 595,806 +28% 0.28% $5,249,051
Herald Investment Management Ltd 1.7% 446,078 +39% 0.52% $3,898,722
Palisades Investment Partners, LLC 1.5% 376,594 1.3% $3,317,793
Arosa Capital Management LP 1.1% 287,500 3.9% $2,532,875
SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.99% 252,035 0% $2,220,428
TWO SIGMA INVESTMENTS, LP 0.96% 246,705 0% $2,173,471
GENDELL JEFFREY L 0.95% 243,622 +484% 0.04% $2,146,310
Integrated Wealth Concepts LLC 0.85% 216,465 +22% 0.02% $1,907,057
CITADEL ADVISORS LLC 0.84% 213,708 0% $1,882,768
BlackRock, Inc. 0.72% 184,779 0% 0% $1,627,903
GEODE CAPITAL MANAGEMENT, LLC 0.65% 166,557 +17% 0% $1,467,836
RAYMOND JAMES FINANCIAL INC 0.62% 157,888 0% $1,390,994
Apis Capital Advisors, LLC 0.6% 153,000 0.3% $1,347,930
NEW YORK STATE COMMON RETIREMENT FUND 0.54% 137,200 0% $1,208,732
GOLDMAN SACHS GROUP INC 0.52% 132,762 0% $1,169,633
ROYAL BANK OF CANADA 0.48% 122,364 +109% 0% $1,078,000
THOMPSON DAVIS & CO., INC. 0.46% 117,953 0.64% $1,039,170
Granahan Investment Management, LLC 0.44% 112,338 0.04% $989,698
RENAISSANCE TECHNOLOGIES LLC 0.4% 102,200 0% $900,382
Russell Investments Group, Ltd. 0.37% 94,696 0% $834,272
JANE STREET GROUP, LLC 0.36% 93,110 0% $820,300
Informed Momentum Co LLC 0.29% 74,101 0.07% $652,830

Institutional Holders of TECOGEN INC. - Common Stock, $0.001 par value (TGEN) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 564,409 $2,788,670 +$73,920 $4.94 4
2025 Q3 7,727,290 $68,035,883 +$34,021,652 $8.81 70
2025 Q2 3,850,152 $26,220,032 +$26,134,804 $6.80 29
2025 Q1 12,500 $28,000 +$28,000 $2.24 1
2024 Q1 0 $0 -$260,073 $4.94 0
2023 Q4 321,078 $260,073 $0.81 1
2023 Q3 321,078 $272,916 $0.85 1
2023 Q2 321,078 $320,917 $1.00 1
2023 Q1 321,078 $381,280 $1.19 1
2022 Q4 321,078 $401,000 $1.25 1
2022 Q3 321,078 $304,000 $0.95 1
2022 Q2 321,078 $362,000 $1.13 1
2022 Q1 321,078 $529,000 -$12,000 $1.65 1
2021 Q4 331,482 $397,000 $1.18 2
2021 Q3 321,078 $581,000 $1.81 1
2021 Q2 321,078 $600,000 $1.87 1
2021 Q1 321,078 $545,000 $1.70 1
2020 Q4 321,078 $391,000 $1.22 1
2020 Q3 321,078 $292,000 -$67,000 $0.91 1
2020 Q2 415,508 $291,000 -$2,949,223 $0.71 3
2020 Q1 3,584,041 $3,331,556 -$271,834 $0.93 19
2019 Q4 3,846,695 $8,166,152 -$318,320 $2.12 17
2019 Q3 4,014,436 $9,514,896 -$179,435 $2.38 21
2019 Q2 4,089,784 $15,245,500 +$274,651 $3.75 19
2019 Q1 4,014,752 $15,960,708 +$3,938,143 $4.00 23
2018 Q4 3,028,066 $10,991,396 -$406,607 $3.63 17
2018 Q3 3,199,416 $10,381,980 +$40,585 $3.15 16
2018 Q2 3,185,668 $11,814,224 +$2,283,780 $3.72 17
2018 Q1 2,571,272 $7,351,312 +$273,611 $2.86 15
2017 Q4 2,475,328 $6,668,840 +$80,699 $2.70 13
2017 Q3 2,440,908 $7,788,000 +$641,825 $3.19 13
2017 Q2 2,238,670 $7,415,000 +$619,228 $3.33 10
2017 Q1 2,023,482 $7,669,000 +$1,080,762 $3.79 9
2016 Q4 1,729,553 $7,265,000 -$138,719 $4.20 9
2016 Q3 1,762,719 $7,332,000 -$2,587,398 $4.16 11
2016 Q2 2,384,591 $12,160,000 -$1,573,487 $5.10 6
2016 Q1 2,838,874 $11,136,000 +$2,178,106 $3.91 11
2015 Q4 2,292,986 $8,026,000 -$369,627 $3.50 10
2015 Q3 2,396,456 $8,268,000 -$34,545 $3.45 10
2015 Q2 2,404,531 $9,859,000 +$4,415 $4.10 13
2015 Q1 2,403,504 $12,186,000 +$430,168 $5.07 11
2014 Q4 2,318,781 $12,111,220 +$5,462,242 $5.22 11
2014 Q3 1,273,617 $7,132,600 +$2,639,207 $5.60 8
2014 Q2 801,143 $6,399,990 +$6,399,990 $7.99 8