TGEN

Tecogen Inc/waltham Ma$3.74 2.47%
IndustrialsUSCUSIP 87876P201· EOD Aug 4, 2026◍ Confluence graph
Tracked 13F Holders
56
-45 QoQ
13F Value (tracked)
$18.9M
Insider Net · 180d
$134K
6↑ 0↓
Recent Filings
15
Smart-money sentimentBullish
BearishBullish
13F funds (latest Q)14 adding · 8 trimming
Insider net (180d)+$134K

Price & smart-money activity

$3.74 2.47%5Y +99.6%
$0.58$3.68$6.78$9.88$12.9820212022202320242025202621818163422329922311178121542
Hover for who · click for detailEnd-of-day closing prices52w $2.00 – $12.07

Who owns TGEN?

56 tracked 13F filers

56 tracked 13F filers disclose a position in TGEN as of the latest SEC 13F filings, a combined $18.9M in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.

All quarters use one ordinary-share-equivalent series. Historical ADS are converted at 2 ADS = 1 ordinary share. Expand a row for the exact calculation; the residual is not classified as a trade.
#FundPosition valueSharesLast moveAs ofHistory
1VANGUARD CAPITAL MANAGEMENT LLC
$2.0M
770K
First observed position
No prior filed position
Q1 2026
2Portolan Capital Management, LLC
$1.1M
444K
−0.5%
Reduced · −2K sh
Q1 2026
3HERALD INVESTMENT MANAGEMENT Ltd
$2.2M
420K
Held
Q2 2026
4Arosa Capital Management LP
$896K
350K
Held
Q1 2026
5Palisades Investment Partners, LLC
$1.7M
323K
−3.2%
Reduced · −11K sh
Q2 2026
6UBS Group AG
$819K
320K
+205%
Added · +215K sh
Q1 2026
7RENAISSANCE TECHNOLOGIES LLC
$697K
272K
+401%
Added · +218K sh
Q1 2026
8GENDELL JEFFREY L
$629K
246K
−17%
Reduced · −50K sh
Q1 2026
9Huntleigh Advisors, Inc.
$1.1M
220K
New
+220K sh
Q2 2026
10Integrated Wealth Concepts LLC
$559K
218K
New
+218K sh
Q1 2026
11MARSHALL WACE, LLP
$531K
207K
−28%
Reduced · −79K sh
Q1 2026
12GEODE CAPITAL MANAGEMENT, LLC
$492K
192K
+7.9%
Added · +14K sh
Q1 2026
13RAYMOND JAMES FINANCIAL INC
$476K
186K
+86%
Added · +86K sh
Q1 2026
14BlackRock, Inc.
$473K
185K
−3.4%
Reduced · −7K sh
Q1 2026
15CITADEL ADVISORS LLC
$378K
147K
+201%
Added · +99K sh
Q1 2026
16THOMPSON DAVIS & CO., INC.
$756K
145K
+46%
Added · +46K sh
Q2 2026
17NEW YORK STATE COMMON RETIREMENT FUND
$351K
137K
Held
Q1 2026
18HighTower Advisors, LLC
$340K
133K
Held
Q1 2026
19JANE STREET GROUP, LLC
$300K
117K
−43%
Reduced · −90K sh
Q1 2026
20SUSQUEHANNA INTERNATIONAL GROUP, LLP
$280K
109K
−64%
Reduced · −193K sh
Q1 2026
21VANGUARD FIDUCIARY TRUST CO
$247K
96K
First observed position
No prior filed position
Q1 2026
22Granahan Investment Management, LLC
$227K
88K
−50%
Reduced · −89K sh
Q1 2026
23GROUP ONE TRADING LLC
$215K
84K
+48%
Added · +27K sh
Q1 2026
24APIS CAPITAL ADVISORS, LLC
$197K
77K
New
+77K sh
Q1 2026
25MORGAN STANLEY
$196K
77K
+9.7%
Added · +7K sh
Q1 2026

Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.

Is TGEN being bought or sold by institutions?

Last quarter, 10 funds opened a new position in TGEN and 4 added to an existing one, while 8 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).

Opened (NEW)
10
funds
Added
4
funds
Reduced
8
funds
Exited
0
funds

Funds that own TGEN also own

CompanyCo-held byCombined value
MICROSOFT CORPMSFT21 funds$27.3B
META PLATFORMS INC-CLASS AMETA21 funds$9.9B
ADVANCED MICRO DEVICESAMD21 funds$5.4B
NVIDIA CORPNVDA20 funds$44.3B
APPLE INCAAPL20 funds$33.8B
ALPHABET INC-CL AGOOGL20 funds$16.8B
MICRON TECHNOLOGY INCMU20 funds$7.0B
AMAZON.COM INCAMZN19 funds$20.9B
TESLA INCTSLA19 funds$10.5B
ELI LILLY & COLLY19 funds$7.7B
BERKSHIRE HATHAWAY INC-CL BBRK/B19 funds$6.0B
VISA INC-CLASS A SHARESV19 funds$5.1B

Ranked by how many of TGEN's institutional holders also hold each name, a cross-fund conviction signal.

Insider activity (Form 4)

Full insider page →
Buys · 180d
$134K
6 insiders
Sells · 180d
$0
0 insiders
Net
$134K
8 P/S txns
Signal
Net Buying
open-market
DateInsiderRoleActionSharesValue
Apr 24, 2026Ghoniem AhmedDirectorBuy (P)13K$10K
Apr 13, 2026Hirsch Susan BDirectorBuy (P)5K$19K
Mar 27, 2026Lewis EarlDirectorBuy (P)5K$13K
Mar 27, 2026Hirsch Susan BDirectorBuy (P)10K$25K
Mar 26, 2026Lewis EarlDirectorBuy (P)5K$14K
Mar 23, 2026Whiting John Kimball IVGeneral Counsel & SecretaryBuy (P)10K$24K
Mar 20, 2026Rangesh AbinandChief Executive Officer, DirectorBuy (P)3K$7K
Mar 20, 2026Deschenes Roger P.CAOBuy (P)10K$22K
Jun 24, 2025PANORA ROBERT ACOO and PresidentSell (S)900$6K
Jun 23, 2025PANORA ROBERT ACOO and PresidentSell (S)32K$202K
Jun 23, 2025Lafaille StephenVP of Business DevelopmentSell (S)10K$73K
Jun 18, 2025PANORA ROBERT ACOO and PresidentSell (S)13K$65K

Institutional ownership over time

8 funds-15 since Q2 2025
02856Q2 2025Q3 2025Q4 2025Q1 2026Q2 2026
funds holding aggregate valuelatest $5.9M

Recent filings

15 shown

Keep exploring

Connected entities for TGEN

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Ask your agent what changed in TGEN

This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.

Copy-paste
curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://arkolith.com/api/v1/stocks/TGEN/capital-change-brief"
Ask your agent
Use Arkolith's capital_change_brief for TGEN.
Tell me what changed, whether insider activity
corroborates it, and cite the SEC evidence.

13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for TGEN. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.