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GROUP ONE TRADING LLC

Position in TGEN — Tecogen Inc.

CIK 932540 CHICAGO, IL

Position in TGEN

as of Mar 31, 2026 · filed May 13, 2026
Position Value
$214,840
-$64,655 QoQ
Shares Held
83,922
+48.3% QoQ
Ownership
0.281%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
not a current holder
Holding Since
Sep 2025
3 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in TGEN Over Time

Shares Held

Position Value (USD)

Position in Electrical Equipment & Parts

Industrials · as of Mar 31, 2026

GROUP ONE TRADING LLC holds $18,498,201 across 20 Electrical Equipment & Parts names. TGEN ranks #6 (1.2% of the industry book) .

# Ticker Company Shares Value (USD) Open
6 TGEN
Tecogen Inc.
This page
83,922 $214,840

All Filings in TGEN

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3 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $214,840 83,922
2025-12-31 $279,495 56,578
2025-09-30 $299,117 33,952