§ 13F · FUND PROFILE
GROUP ONE TRADING LLC.
Options market maker, proprietary trading
AUM · $56.9B (13F)Positions · 8852Turnover · 93% · Q1Filed · May 13, 2026
CONCENTRATION
14%
Top 10 holdings
NEW BUYS
+1226
+$1.3B deployed
EXITS
0
No exits
SECTOR SHIFT
TECHNOLOGY → SEMICONDUCTORS
-2pp · +0pp
3YR HIT RATE
—
Top-5 overlap
§ 01 · TOP HOLDINGS
The book · Q1 2026
FILED MAY 13, 2026
| # | Ticker | Name | Shares | $ value | % port | Δ Q1 |
|---|---|---|---|---|---|---|
| 1 | GLD | SPDR GOLD TR | 4.00M | $1.7B | 3.3% | +116% |
| 2 | TSLA | TESLA INC | 2.86M | $1.1B | 2.0% | +6% |
| 3 | META | META PLATFORMS INC | 1.54M | $880M | 1.7% | −16% |
| 4 | UNH | UNITEDHEALTH GROUP INC | 2.67M | $724M | 1.4% | −22% |
| 5 | GLD | SPDR GOLD TR | 1.52M | $654M | 1.3% | +79% |
| 6 | AAPL | APPLE INC | 1.99M | $506M | 1.0% | +4% |
| 7 | MU | MICRON TECHNOLOGY INC | 1.48M | $498M | 1.0% | +121% |
| 8 | TSLA | TESLA INC | 1.33M | $494M | 0.9% | +19% |
| 9 | NVDA | NVIDIA CORPORATION | 2.81M | $491M | 0.9% | −35% |
| 10 | SLV | ISHARES SILVER TR | 7.18M | $489M | 0.9% | +67% |
§ 02 · SECTOR ALLOCATION
Where the money is
Other36.9% (−2pp)
Technology11.4% (−2pp)
Semiconductors9.3% (±0)
Energy5.6%
Media5.5% (−1pp)
Financial Services4.2% (±0)
§ 03 · THE GROUP SIGNAL
AC read
GROUP ONE TRADING LLC is a Systematic / Quant fund managing $56.9 billion in assets. The fund runs a massive portfolio of 8,852 positions, broad diversification across holdings. Trading activity is aggressive at 93% quarterly turnover, with 1226 new positions and 0 exits last quarter. Top sector allocations: Other (37%), Technology (11%), Semiconductors (9%).
Read the full dossier →§ 04 · FILING HISTORY
Q-by-Q deltas
2 FILINGS
Q1 2026
Busy quarter
+1226 buys · −0 exits · 6257 changed
Q4 2025
Busy quarter
+1283 buys · −0 exits · 6673 changed
Q3 2025
Busy quarter
+8656 buys · −0 exits · 0 changed
Q1 2025
Busy quarter
+1581 buys · −0 exits · 5873 changed