GROUP ONE TRADING LLC
"13F equity value" = market value of this filer's US-listed long equity positions only. It excludes cash, bonds, non-US and short positions, so it understates a fund's true assets under management — often by a lot.
13F holdings are disclosed ~45 days after quarter-end, and they never reveal when within the quarter a fund actually bought. So any 13F-based summary is structurally late and blurred — this applies to every fund, including this one.
We backtested copying it anyway. Buying this fund's new positions the day each filing went public, over 32 quarters, returned +2.9% per quarter — versus +2.7% per quarter from simply owning every 13F stock. It beat that baseline in only 43.8% of quarters (excess t = 1.48, not statistically significant). Its filings tell you what it bought — not what you should buy.
Quarterly compounding, invested quarters only · entry 47 days after quarter-end (when 13F data becomes public)
Top 20 holdings of 2167 · 2026 Q1
| Ticker | Value | Weight | QoQ |
|---|---|---|---|
| URA | $85M | | ADD |
| SILJ | $72M | | TRIM |
| MU | $53M | | ADD |
| TSM | $47M | | ADD |
| AG | $42M | | ADD |
| URNM | $37M | | NEW |
| MAR | $35M | | ADD |
| PBR | $33M | | ADD |
| EWY | $31M | | NEW |
| KKR | $31M | | ADD |
| CYTK | $24M | | TRIM |
| COPX | $23M | | ADD |
| CDE | $23M | | ADD |
| KWEB | $22M | | ADD |
| EWZ | $22M | | ADD |
| INTC | $21M | | ADD |
| VST | $20M | | ADD |
| SOFI | $20M | | ADD |
| IREN | $19M | | TRIM |
| LITE | $19M | | ADD |
QoQ vs previous quarter's share count · NEW = new position · ADD/TRIM = ±2% shares · HOLD = unchanged.
New positions in 2026 Q1
Method & Limitations
Method: a "new position" = held this quarter, absent last quarter (options excluded; stocks with <50 prior holders excluded to filter spin-off artifacts). Entry 47 days after quarter-end — the first day the public could act on the filing. Benchmark = equal-weighted universe of all 13F-held stocks. Limitations: quarterly snapshots can't see intra-quarter trades; survivorship bias — funds that shut down are absent, which flatters the sample. Statistics, not advice.