TECOGEN INC. - TGEN

Detailed investor-level table based on 13F positions.

Shareholders (13F)

Quarter: Q1 2026 · Compare: Q4 2025
13D/13G major owners: Ownership tab.
Methodology: Market value and % of portfolio use SEC reported VALUE ($000). For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received. Details.
Rows: 0
Investor History Status Shares held Market value ($000) % of portfolio Previous % Rank Change in shares % change in shares Source Date reported
VANGUARD GROUP INC History No change 871,840 4,306 0.0% 0.0% 1 0 0.0% Q4 2025 Jan 29, 2026
VANGUARD CAPITAL MANAGEMENT LLC History New 769,964 1,971 0.0% 2 +769,964 New Q1 2026 May 15, 2026
BARD ASSOCIATES INC History Reduced 688,309 1,762 0.44% 0.87% 3 -798 -0.12% Q1 2026 May 07, 2026
Clear Harbor Asset Management, LLC History Added to 650,000 1,664 0.11% 0.2% 4 +40,000 6.56% Q1 2026 May 05, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLP History Reduced 481,157 1,231 0.0% 0.0% 5 -56,254 -10.47% Q1 2026 May 15, 2026
Portolan Capital Management, LLC History Reduced 443,555 1,135 0.06% 0.12% 6 -2,255 -0.51% Q1 2026 May 15, 2026
CITADEL ADVISORS LLC History Added to 430,072 1,100 0.0% 0.0% 7 +276,252 179.59% Q1 2026 May 15, 2026
HERALD INVESTMENT MANAGEMENT Ltd History No change 420,000 1,079 0.15% 0.27% 8 0 0.0% Q1 2026 May 13, 2026
Arosa Capital Management LP History No change 350,000 896 0.14% 0.22% 9 0 0.0% Q1 2026 May 15, 2026
Palisades Investment Partners, LLC History Reduced 333,907 854 0.33% 0.73% 10 -56,305 -14.43% Q1 2026 Apr 30, 2026
UBS Group AG History Added to 319,836 818 0.0% 0.0% 11 +214,877 204.72% Q1 2026 May 05, 2026
Meros Investment Management, LP History New 291,705 746 0.32% 12 +291,705 New Q1 2026 May 14, 2026
RENAISSANCE TECHNOLOGIES LLC History Added to 272,300 697 0.0% 0.0% 13 +218,000 401.47% Q1 2026 May 14, 2026
GENDELL JEFFREY L History Reduced 245,541 628 0.01% 0.03% 14 -50,000 -16.92% Q1 2026 May 15, 2026
Integrated Wealth Concepts LLC History New 218,380 559 0.0% 15 +218,380 New Q1 2026 May 15, 2026
MARSHALL WACE, LLP History Reduced 207,467 531 0.0% 0.0% 16 -78,858 -27.54% Q1 2026 May 14, 2026
GEODE CAPITAL MANAGEMENT, LLC History Added to 192,002 491 0.0% 0.0% 17 +14,088 7.92% Q1 2026 May 15, 2026
JANE STREET GROUP, LLC History Reduced 191,142 489 0.0% 0.0% 18 -126,865 -39.89% Q1 2026 May 12, 2026
RAYMOND JAMES FINANCIAL INC History Added to 185,794 475 0.0% 0.0% 19 +86,040 86.25% Q1 2026 May 14, 2026
BlackRock, Inc. History Reduced 184,779 473 0.0% 0.0% 20 -6,581 -3.44% Q1 2026 May 13, 2026
NEW YORK STATE COMMON RETIREMENT FUND History No change 137,200 351 0.0% 0.0% 21 0 0.0% Q1 2026 May 06, 2026
HighTower Advisors, LLC History No change 132,665 339 0.0% 0.0% 22 0 0.0% Q1 2026 May 05, 2026
THOMPSON DAVIS & CO., INC. History Reduced 99,000 253 0.17% 0.36% 23 -21,450 -17.81% Q1 2026 Apr 16, 2026
VANGUARD FIDUCIARY TRUST CO History New 96,442 246 0.0% 24 +96,442 New Q1 2026 May 08, 2026
GSA CAPITAL PARTNERS LLP History Added to 94,170 241 0.01% 0.01% 25 +74,738 384.61% Q1 2026 May 08, 2026
GROUP ONE TRADING LLC History Reduced 92,722 237 0.0% 0.0% 26 -7,356 -7.35% Q1 2026 May 13, 2026
Granahan Investment Management, LLC History Reduced 88,496 226 0.01% 0.04% 27 -89,326 -50.23% Q1 2026 May 15, 2026
SIMPLEX TRADING, LLC History Reduced 79,932 204 0.0% 0.0% 28 -24,799 -23.68% Q1 2026 May 14, 2026
APIS CAPITAL ADVISORS, LLC History New 77,000 197 0.03% 29 +77,000 New Q1 2026 May 15, 2026
MORGAN STANLEY History Added to 76,736 196 0.0% 0.0% 30 +6,758 9.66% Q1 2026 May 15, 2026
STATE STREET CORP History No change 69,226 177 0.0% 0.0% 31 0 0.0% Q1 2026 May 15, 2026
TWO SIGMA INVESTMENTS, LP History Reduced 67,418 172 0.0% 0.0% 32 -151,210 -69.16% Q1 2026 May 15, 2026
PFG Investments, LLC History No change 62,523 160 0.01% 0.01% 33 0 0.0% Q1 2026 Apr 27, 2026
IMC-Chicago, LLC History Reduced 61,650 157 0.0% 0.0% 34 -33,405 -35.14% Q1 2026 May 05, 2026
CORSAIR CAPITAL MANAGEMENT, L.P. History No change 55,017 140 0.02% 0.04% 35 0 0.0% Q1 2026 May 15, 2026
Diametric Capital, LP History Reduced 53,131 136 0.04% 0.07% 36 -96 -0.18% Q1 2026 May 15, 2026
LPL Financial LLC History Reduced 41,251 105 0.0% 0.0% 37 -32,542 -44.1% Q1 2026 May 06, 2026
HARBOR CAPITAL ADVISORS, INC. History Reduced 39,973 102 0.01% 0.02% 39 -474 -1.17% Q1 2026 Apr 28, 2026
GAMCO INVESTORS, INC. ET AL History No change 40,000 102 0.0% 0.0% 38 0 0.0% Q1 2026 May 14, 2026
NORTHERN TRUST CORP History No change 37,681 96 0.0% 0.0% 40 0 0.0% Q1 2026 May 14, 2026
Jump Financial, LLC History New 35,500 90 0.0% 41 +35,500 New Q1 2026 May 14, 2026
BRIDGEWAY CAPITAL MANAGEMENT, LLC History Added to 33,048 84 0.0% 0.0% 42 +7,548 29.6% Q1 2026 May 15, 2026
GOLDMAN SACHS GROUP INC History Reduced 25,106 64 0.0% 0.0% 43 -42,618 -62.93% Q1 2026 May 15, 2026
GABELLI FUNDS LLC History New 20,000 51 0.0% 44 +20,000 New Q1 2026 May 14, 2026
Pathstone Holdings, LLC History No change 18,725 47 0.0% 0.0% 45 0 0.0% Q1 2026 May 11, 2026
SHIKIAR ASSET MANAGEMENT INC History Added to 17,650 45 0.01% 0.02% 46 +4,350 32.71% Q1 2026 Apr 23, 2026
COMMONWEALTH EQUITY SERVICES, LLC History Added to 16,124 41 0.0% 0.0% 47 +4,350 36.95% Q1 2026 Apr 27, 2026
HRT FINANCIAL LP History New 15,071 38 0.0% 48 +15,071 New Q1 2026 May 14, 2026
DIMENSIONAL FUND ADVISORS LP History New 11,163 28 0.0% 49 +11,163 New Q1 2026 May 07, 2026
Tower Research Capital LLC (TRC) History New 10,189 26 0.0% 50 +10,189 New Q1 2026 May 15, 2026
CITIZENS FINANCIAL GROUP INC/RI History New 10,000 25 0.0% 51 +10,000 New Q1 2026 May 01, 2026
Vanguard Global Advisers, LLC History New 5,434 13 0.0% 52 +5,434 New Q1 2026 May 08, 2026
ROYAL BANK OF CANADA History Reduced 3,143 8 0.0% 0.0% 53 -82,402 -96.33% Q1 2026 May 15, 2026
Advisory Services Network, LLC History New 2,490 6 0.0% 55 +2,490 New Q1 2026 May 15, 2026
EverSource Wealth Advisors, LLC History Added to 2,500 6 0.0% 0.0% 54 +1,500 150.0% Q1 2026 May 15, 2026
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC History New 1,583 4 0.0% 56 +1,583 New Q1 2026 May 13, 2026
NATIONAL BANK OF CANADA /FI/ History Added to 500 1 0.0% 0.0% 57 +270 117.39% Q1 2026 May 14, 2026
State of Wyoming History Reduced 494 1 0.0% 0.0% 58 -44 -8.18% Q1 2026 May 13, 2026
Federation des caisses Desjardins du Quebec History No change 562 1 0.0% 0.0% 59 0 0.0% Q1 2026 May 13, 2026
Caption Management, LLC History Closed out 0 0 0.01% -150,000 -100.0% Q1 2026 May 15, 2026
Point72 Asset Management, L.P. History Closed out 0 0 0.0% -83,907 -100.0% Q1 2026 May 15, 2026
MANGROVE PARTNERS IM, LLC History Closed out 0 0 0.02% -61,207 -100.0% Q1 2026 May 15, 2026
XTX Topco Ltd History Closed out 0 0 0.01% -54,763 -100.0% Q1 2026 May 15, 2026
OMERS ADMINISTRATION Corp History Closed out 0 0 0.0% -42,000 -100.0% Q1 2026 May 15, 2026
J.W. COLE ADVISORS, INC. History Closed out 0 0 0.0% -26,300 -100.0% Q1 2026 Apr 23, 2026
Quantbot Technologies LP History Closed out 0 0 0.0% -22,820 -100.0% Q1 2026 May 13, 2026
MILLENNIUM MANAGEMENT LLC History Closed out 0 0 0.0% -22,507 -100.0% Q1 2026 May 15, 2026
Hidden Cove Wealth Management, LLC History Closed out 0 0 0.07% -21,087 -100.0% Q1 2026 Apr 21, 2026
Centiva Capital, LP History Closed out 0 0 0.0% -18,400 -100.0% Q1 2026 May 14, 2026
Ark Wealth Advisors LLC History Closed out 0 0 0.08% -14,881 -100.0% Q1 2026 May 14, 2026
CHARLES SCHWAB INVESTMENT MANAGEMENT INC History Closed out 0 0 0.0% -12,000 -100.0% Q1 2026 May 15, 2026
Lighthouse Investment Partners, LLC History Closed out 0 0 0.0% -10,920 -100.0% Q1 2026 May 14, 2026
BANK OF AMERICA CORP /DE/ History Closed out 0 0 0.0% -10,784 -100.0% Q1 2026 May 15, 2026
CITIGROUP INC History Closed out 0 0 0.0% -8,535 -100.0% Q1 2026 May 11, 2026
OSAIC HOLDINGS, INC. History Closed out 0 0 0.0% -500 -100.0% Q1 2026 May 15, 2026
JPMORGAN CHASE & CO History Closed out 0 0 0.0% -450 -100.0% Q1 2026 May 13, 2026
BNP PARIBAS FINANCIAL MARKETS History Closed out 0 0 0.0% -214 -100.0% Q1 2026 May 12, 2026
Fortitude Family Office, LLC History New 181 0 +181 New Q1 2026 Apr 15, 2026
NewEdge Advisors, LLC History Closed out 0 0 -88 -100.0% Q1 2026 May 15, 2026
Laurel Wealth Advisors LLC History Closed out 0 0 -45 -100.0% Q1 2026 May 12, 2026
SBI Securities Co., Ltd. History Added to 120 0 +3 2.56% Q1 2026 Apr 27, 2026
MAI Capital Management History No change 64 0 0 0.0% Q1 2026 May 15, 2026