GROUP ONE TRADING LLC

Activist investor & 5%+ owner · SC 13D/13G filings

Total Filings

3

Stocks Covered

2

Latest Filing

Mar 5, 2026

Filings

QNCX

Quince Therapeutics, Inc.

SC 13G · Mar 5, 2026

10.7%

5.9M shares

RILY

B. Riley Financial, Inc.

SC 13G · May 14, 2025

2.8%

853K shares

RILY

B. Riley Financial, Inc.

SC 13G · Nov 14, 2024

5.8%

1.8M shares