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GROUP ONE TRADING LLC

Location
CHICAGO, IL
Portfolio Value
Mid $2,582,451,272
Diversification
Diversified
Filing Date
Global Rank
#1,059 / 8,605 ▼ 111 · as of Mar 2026
Top Industry
Semiconductors 6.7%
3Y Alpha vs SPY
-2.9%
Period ended 3 months ago
Filed May 13, 2026 · 57d
25 quarters · since Mar 2020

Clone Performance

Jul 2023–Jul 2026 · vs SPY

Hypothetical growth of cloning every reported 13F position and rebalancing on each filing, indexed to the same start.

Cloned portfolio
+50.5%
SPY
+76.5%
Annualised alpha
-6.3%
Max drawdown
−18.9%

Estimate. 13F holdings are quarter-lagged and long-only, so the clone rebalances about 45 days after each period end — when the filing becomes public — and excludes options and short positions. Past performance does not predict future results.

Portfolio Concentration

1,838 positions · as of Mar 31, 2026 · Δ vs Dec 31, 2025
Top Position
2.0%
−1.0 pts
Top 5
8.8%
+0.4 pts
Top 10
13.9%
+0.8 pts
HHI
46
Jun 2023 → Mar 2026 · range 46 – 240
Diversified+1

Portfolio Trend

25 quarters · across all stocks

Sector Breakdown

As of Mar 31, 2026
Sector % Portfolio Value
Technology 18.9% $487,034,369
Financial Services 13.6% $352,416,977
Consumer Cyclical 12.7% $329,030,586
Basic Materials 11.3% $292,516,536
Healthcare 10.8% $279,197,312
Industrials 9.6% $246,632,133
Energy 7.8% $202,587,185
Unclassified 4.1% $106,411,507
Communication Services 3.9% $100,402,564
Consumer Defensive 3.3% $84,696,841
Utilities 2.6% $66,501,830
Real Estate 1.4% $35,023,432

Last Quarter's Activity

Export CSV
Mar 31, 2026 vs Dec 31, 2025

Added To

Positions the filer increased
25 positions
Ticker Δ Shares Shares Value Open

Trimmed

Positions the filer reduced
25 positions
Ticker Δ Shares Shares Value Open

New Positions

Positions the filer opened this quarter
25 positions
Ticker Shares Value Open

Sold Out

Positions the filer fully exited
25 positions
Ticker Shares Value Open

Portfolio Positions

Export CSV View 13F filing
1,838 positions · $2,582,451,272 total · as of Mar 31, 2026
Showing 1–50 of 1,838 positions by value · page 1 of 37
Ticker Company Shares Value (USD) % of Portfolio History