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§ 13F · FUND PROFILE

GROUP ONE TRADING LLC.

Options market maker, proprietary trading
AUM · $56876.5T (13F)Positions · 8852Turnover · 95% · Q4Filed · Feb 12, 2026
BIG MOVE · Q4
Technology cut 4pp. Other lifted 3pp.
CONCENTRATION
14%
Top 10 holdings
NEW BUYS
+1305
+$1335.2T deployed
EXITS
0
No exits
SECTOR SHIFT
TECHNOLOGY → OTHER
-4pp · +3pp
3YR HIT RATE
Top-5 overlap
§ 01 · TOP HOLDINGS

The book · Q4 2025

FILED FEB 12, 2026
#TickerNameShares$ value% portΔ Q4
1TSLATESLA INC2.70M$1215.4T2.1%−4%
2METAMETA PLATFORMS INC1.84M$1211.5T2.1%+31%
3UNHUNITEDHEALTH GROUP INC3.45M$1138.9T2.0%+13%
4NVDANVIDIA CORPORATION4.32M$805.9T1.4%−7%
5GLDSPDR GOLD TR1.85M$735.0T1.3%+64%
6LLYELI LILLY & CO626K$672.3T1.2%+1%
7ALIBABA GROUP HLDG LTD4.19M$614.1T1.1%−27%
8AAPLAPPLE INC1.91M$518.5T0.9%−13%
9TSLATESLA INC1.12M$504.2T0.9%−11%
10MSFTMICROSOFT CORP1.01M$488.8T0.9%−18%
§ 02 · SECTOR ALLOCATION

Where the money is

Other38.1% (+3pp)
Technology13.6% (4pp)
Semiconductors8.4% (±0)
Media6.6% (1pp)
Financial Services4.6% (±0)
Health Care4.2% (±0)
§ 03 · THE GROUP SIGNAL

AC read

GROUP ONE TRADING LLC is a Systematic / Quant fund managing $56876471.9 trillion in assets. The fund runs a massive portfolio of 8,852 positions, broad diversification across holdings. Trading activity is aggressive at 95% quarterly turnover, with 1305 new positions and 0 exits last quarter. Top sector allocations: Other (38%), Technology (14%), Semiconductors (8%).

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§ 04 · FILING HISTORY

Q-by-Q deltas

2 FILINGS
Q4 2025
Busy quarter
+1305 buys · 0 exits · 6860 changed
Q3 2025
Steady book
+0 buys · 0 exits · 0 changed
Q1 2025
Steady book
+0 buys · 0 exits · 0 changed
Q4 2024
Steady book
+0 buys · 0 exits · 0 changed