Equibles

TGEN

Tecogen Inc.

Company with tickers: TGEN

CIK
1537435
CUSIP
87876P201
Shares Outstanding
29,917,952
13F Activity (30d)
54 filings 52 filers
Holders: 61
Total Value: $21,791,686
Total Shares: 8,512,390

Institutional Ownership Trend

21 quarters

Holder Concentration

Across 61 13F filers · Δ vs Dec 31, 2025
Top Holder
9.0%
Jun 2022 → Mar 2026 · range 9.0% – 100.0%
−1.5 pts
Top 5
35.6%
Jun 2022 → Mar 2026 · range 35.6% – 100.0%
−2.7 pts
Top 10
57.4%
Jun 2022 → Mar 2026 · range 57.4% – 100.0%
−2.4 pts
HHI
440
Jun 2022 → Mar 2026 · range 440 – 10,000
Broadly held −24

Quarterly Activity

vs Dec 31, 2025
New
15
Increased
15
Decreased
19
Sold Out
22
Unchanged
12
Holder count: -7
Institutional value: -46.5%
Shares held: +3.3%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mega CITADEL ADVISORS LLC +276,252 430,072
Large RENAISSANCE TECHNOLOGIES LLC +218,000 272,300
Mega UBS Group AG +214,877 319,836
Mega RAYMOND JAMES FINANCIAL INC +86,040 185,794
Mid GSA CAPITAL PARTNERS LLP +74,738 94,170

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Mega TWO SIGMA INVESTMENTS, LP −151,210 67,418
Mega JANE STREET GROUP, LLC −126,865 191,142
Mid Granahan Investment Management, LLC −89,326 88,496
Mega ROYAL BANK OF CANADA −82,402 3,143
Large MARSHALL WACE, LLP −78,858 207,467

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 769,964 $1,971,107
Small Meros Investment Management, LP 291,705 $746,764
Mid Integrated Wealth Concepts LLC 218,380 $559,052
Mega VANGUARD FIDUCIARY TRUST CO 96,442 $246,891
Small Apis Capital Advisors, LLC 77,000 $197,120

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega VANGUARD GROUP INC 871,840 $4,306,888
Large Caption Management, LLC 150,000 $741,000
Large Point72 Asset Management, L.P. 83,907 $414,500
Mid MANGROVE PARTNERS IM, LLC 61,207 $302,362
Mid XTX Topco Ltd 54,763 $270,529
Filter: New 15 Increased 15 Reduced 19 Sold out 22 Unchanged 12
Showing 67 of 67
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mega VANGUARD CAPITAL MANAGEMENT LLC $1,971,107 9.05% 769,964
Small BARD ASSOCIATES INC $1,762,071 8.09% 688,309
Mid Clear Harbor Asset Management, LLC $1,664,000 7.64% 650,000
Mid Portolan Capital Management, LLC $1,135,500 5.21% 443,555
Small HERALD INVESTMENT MANAGEMENT Ltd $1,075,200 4.93% 420,000
Small Arosa Capital Management LP $896,000 4.11% 350,000
Small Palisades Investment Partners, LLC $854,801 3.92% 333,907
Mega UBS Group AG $818,778 3.76% 319,836
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $753,664 3.46% 294,400
Small Meros Investment Management, LP $746,764 3.43% 291,705
Large RENAISSANCE TECHNOLOGIES LLC $697,088 3.20% 272,300
Mid GENDELL JEFFREY L $628,584 2.88% 245,541
Mega CITADEL ADVISORS LLC $594,944 2.73% 232,400
Mid Integrated Wealth Concepts LLC $559,052 2.57% 218,380
Large MARSHALL WACE, LLP $531,114 2.44% 207,467
Mega GEODE CAPITAL MANAGEMENT, LLC $491,524 2.26% 192,002
Mega RAYMOND JAMES FINANCIAL INC $475,632 2.18% 185,794
Mega BlackRock, Inc. $473,034 2.17% 184,779
Mega CITADEL ADVISORS LLC $377,527 1.73% 147,472
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $351,232 1.61% 137,200
Large HighTower Advisors, LLC $339,622 1.56% 132,665
Mega JANE STREET GROUP, LLC $300,393 1.38% 117,342
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $280,209 1.29% 109,457
Small THOMPSON DAVIS & CO., INC. $253,440 1.16% 99,000
Mega VANGUARD FIDUCIARY TRUST CO Bank $246,891 1.13% 96,442
Mid GSA CAPITAL PARTNERS LLP $241,075 1.11% 94,170
Mid Granahan Investment Management, LLC $226,549 1.04% 88,496
Mid GROUP ONE TRADING LLC $214,840 0.99% 83,922
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $197,888 0.91% 77,300
Small Apis Capital Advisors, LLC $197,120 0.90% 77,000
Mega MORGAN STANLEY $196,443 0.90% 76,736
Mega STATE STREET CORP $177,218 0.81% 69,226
Mega TWO SIGMA INVESTMENTS, LP $172,590 0.79% 67,418
Mid PFG Investments, LLC $160,058 0.73% 62,523
Small CORSAIR CAPITAL MANAGEMENT, L.P. $140,843 0.65% 55,017
Mega JANE STREET GROUP, LLC $140,032 0.64% 54,700
Small Diametric Capital, LP $136,015 0.62% 53,131
Mega CITADEL ADVISORS LLC $128,512 0.59% 50,200
Mid SIMPLEX TRADING, LLC $105,809 0.49% 41,332
Mega LPL Financial LLC $105,602 0.48% 41,251
Mid GAMCO INVESTORS, INC. ET AL $102,400 0.47% 40,000
Mid HARBOR CAPITAL ADVISORS, INC. $102,330 0.47% 39,973
Mega NORTHERN TRUST CORP Bank $96,463 0.44% 37,681
Mid Jump Financial, LLC $90,880 0.42% 35,500
Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC $84,602 0.39% 33,048
Mega GOLDMAN SACHS GROUP INC $64,271 0.29% 25,106
Large GABELLI FUNDS LLC $51,200 0.23% 20,000
Mega JANE STREET GROUP, LLC $48,896 0.22% 19,100
Large Pathstone Holdings, LLC $47,936 0.22% 18,725
Small SHIKIAR ASSET MANAGEMENT INC $45,184 0.21% 17,650
Large COMMONWEALTH EQUITY SERVICES, LLC $41,277 0.19% 16,124
Large HRT FINANCIAL LP $38,581 0.18% 15,071
Mid IMC-Chicago, LLC $34,944 0.16% 13,650
Mega DIMENSIONAL FUND ADVISORS LP $28,577 0.13% 11,163
Mid Tower Research Capital LLC (TRC) $26,083 0.12% 10,189
Mid CITIZENS FINANCIAL GROUP INC/RI $25,600 0.12% 10,000
Mega Vanguard Global Advisers, LLC $13,911 0.06% 5,434
Mega ROYAL BANK OF CANADA Bank $8,045 0.04% 3,143
Mid EverSource Wealth Advisors, LLC $6,400 0.03% 2,500
Mid Advisory Services Network, LLC $6,374 0.03% 2,490
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $4,052 0.02% 1,583
Large Federation des caisses Desjardins du Quebec $1,438 0.01% 562
Large NATIONAL BANK OF CANADA /FI/ Bank $1,280 0.01% 500
Small State of Wyoming $1,264 0.01% 494
Micro Fortitude Family Office, LLC Family Office $463 0.00% 181
Mid SBI Securities Co., Ltd. Broker-Dealer $307 0.00% 120
Mid MAI Capital Management $163 0.00% 64

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