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GROUP ONE TRADING LLC

Position in DFTX — Definium Therapeutics, Inc.

CIK 932540 CHICAGO, IL

Position in DFTX

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$3,007,878
+$1,347,854 QoQ
Shares Held
63,943
-27.2% QoQ
Ownership
0.048%
of shares outstanding
% of Portfolio
0.10%
of 13F equity value
Holder Rank
#120
of 358 holders
Holding Since
Mar 2026
2 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in DFTX Over Time

Shares Held

Position Value (USD)

Position in Biotechnology

Healthcare · as of Jun 30, 2026

GROUP ONE TRADING LLC holds $113,695,832 across 200 Biotechnology names. DFTX ranks #11 (2.6% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in DFTX

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2 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $3,007,878 63,943
2026-03-31 $1,660,024 87,832