Public ownership evidence

Tecogen Inc. (TGEN) Ownership Disclosures

Read TGEN insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-10-10T12:08:28.848Z

Separate the three disclosure sources

Step 1 of 3

Recent Form 4 activity

Tecogen Inc.: source evidence dated 2026-10-10T12:08:28.848Z.

Available
2026-09-08
Trade date
2026-06-26
Reporting owners
Lafaille Stephen
Code
A
Shares
29,013
Reported value
Not reported
What you should see

The displayed owner or issuer and source fields identify the receipt to verify; keep reporting and availability dates separate.

Step 2 of 3

Is this an insider transaction, 13F holding, or Congressional event?

Each source has different dates and units. Raw ticker-matched receipts, including amendments, are not deduplicated current ownership totals.

SEC 0001537435-26-000088
What you should see

Follow the source receipt or manager/member profile. Avoid combining transaction value and 13F position value into an ownership percentage.

Step 3 of 3

Read TGEN fundamentals

Follow the source receipt or manager/member profile. Avoid combining transaction value and 13F position value into an ownership percentage.

Read TGEN fundamentals
What you should see

Keep reporting dates and units beside the answer, and inspect its original citations.

Recent Form 4 activity

See the complete recent form 4 activity

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2026-09-082026-06-26Lafaille StephenA29,013Not reported
2026-09-082026-06-26Whiting John Kimball IVA19,342Not reported
2026-09-082026-06-26Panora RobertA9,671Not reported
2026-09-082026-06-26Deschenes Roger P.A29,013Not reported
2026-09-082026-06-26Rangesh AbinandA174,081Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

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Jefferies Financial Group Inc.2026-06-302026-08-1819,300$100,746None
Federation des caisses Desjardins du Quebec2026-06-302026-08-15562$2,934None
Meros Investment Management, LP2026-06-302026-08-15353,487$1,845,202None
XTX Topco Ltd2026-06-302026-08-1532,411$169,185None
Diametric Capital, LP2026-06-302026-08-1566,326$346,221None
GRATIA CAPITAL, LLC2026-06-302026-08-15388,660$2,028,805None
Arosa Capital Management LP2026-06-302026-08-15125,000$652,500None
JANE STREET GROUP, LLC2026-06-302026-08-1534,192$178,482None
JANE STREET GROUP, LLC2026-06-302026-08-1514,895$77,752None
JANE STREET GROUP, LLC2026-06-302026-08-1581,400$424,908Put
JANE STREET GROUP, LLC2026-06-302026-08-15303,800$1,585,836Call
HRT FINANCIAL LP2026-06-302026-08-1559,285$309,000None
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-15131,300$685,386Call
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-1588,500$461,970Put
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-15315,831$1,648,638None
Apis Capital Advisors, LLC2026-06-302026-08-15112,000$584,640None
GENDELL JEFFREY L2026-06-302026-08-1549,823$260,076None
ROYAL BANK OF CANADA2026-06-302026-08-15200$1,000None
BRIDGEWAY CAPITAL MANAGEMENT, LLC2026-06-302026-08-1533,048$172,511None
D. E. Shaw & Co., Inc.2026-06-302026-08-1515,339$80,070None
CITADEL ADVISORS LLC2026-06-302026-08-15124,200$648,324Put
CITADEL ADVISORS LLC2026-06-302026-08-15242,050$1,263,501None
CITADEL ADVISORS LLC2026-06-302026-08-15219,100$1,143,702Call
CITADEL ADVISORS LLC2026-06-302026-08-15226$1,180None
Portolan Capital Management, LLC2026-06-302026-08-151,551,113$8,096,810None
CORSAIR CAPITAL MANAGEMENT, L.P.2026-06-302026-08-1555,017$287,189None
GROUP ONE TRADING LLC2026-06-302026-08-1549,872$260,332None
GOLDMAN SACHS GROUP INC2026-06-302026-08-1552,160$272,275None
GOLDMAN SACHS GROUP INC2026-06-302026-08-1517,370$90,671None
RAYMOND JAMES FINANCIAL INC2026-06-302026-08-15290,260$1,515,157None
VANGUARD CAPITAL MANAGEMENT LLC2026-06-302026-08-14788,670$4,116,857None
Pathstone Holdings, LLC2026-06-302026-08-1418,725$97,745None
Vanguard Global Advisers, LLC2026-06-302026-08-145,434$28,365None
UBS Group AG2026-06-302026-08-141,691$8,827None
UBS Group AG2026-06-302026-08-143$17None
UBS Group AG2026-06-302026-08-14361,355$1,886,273None
Virtu Financial LLC2026-06-302026-08-1416,377$85,000None
PEAK6 LLC2026-06-302026-08-14471,900$2,463,318Call
MARSHALL WACE, LLP2026-06-302026-08-1441,397$216,092None
MARSHALL WACE, LLP2026-06-302026-08-1413,409$69,995None
Centiva Capital, LP2026-06-302026-08-1427,528$143,696None
HOLLENCREST CAPITAL MANAGEMENT2026-06-302026-08-1415$78None
VANGUARD FIDUCIARY TRUST CO2026-06-302026-08-14105,956$553,090None
MORGAN STANLEY2026-06-302026-08-149,228$48,170None
MORGAN STANLEY2026-06-302026-08-14292,467$1,526,678None
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC2026-06-302026-08-141,583$8,263None
FMR LLC2026-06-302026-08-1453$279None
NORTHERN TRUST CORP2026-06-302026-08-1437,569$196,110None
Integrated Wealth Concepts LLC2026-06-302026-08-13112,080$585,058None
SIMPLEX TRADING, LLC2026-06-302026-08-13479$2,500None

90-day public filing window, up to 50 source positions.

Jefferies Financial Group Inc. ↗Federation des caisses Desjardins du Quebec ↗Meros Investment Management, LP ↗XTX Topco Ltd ↗Diametric Capital, LP ↗GRATIA CAPITAL, LLC ↗Arosa Capital Management LP ↗JANE STREET GROUP, LLC ↗JANE STREET GROUP, LLC ↗JANE STREET GROUP, LLC ↗

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

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No records are available for this view.

Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Institutional source directory ↗Congressional source directory ↗

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.

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