JANE STREET GROUP, 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 +2.7% per quarter — versus +2.7% per quarter from simply owning every 13F stock. It beat that baseline in only 59.4% of quarters (excess t = -0.80, 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 6009 · 2026 Q1
| Ticker | Value | Weight | QoQ |
|---|---|---|---|
| SPY | $13.2B | | ADD |
| AVGO | $1.4B | | ADD |
| PLTR | $1.3B | | ADD |
| SNDK | $1.1B | | ADD |
| QQQ | $1.0B | | ADD |
| DELL | $1.0B | | ADD |
| MRVL | $986M | | ADD |
| TMUS | $938M | | ADD |
| AMZN | $914M | | ADD |
| IWM | $740M | | ADD |
| CLS | $713M | | ADD |
| CRWV | $686M | | ADD |
| LITE | $672M | | ADD |
| BE | $667M | | HOLD |
| SPDW | $609M | | ADD |
| SLV | $602M | | TRIM |
| MU | $601M | | ADD |
| ORCL | $575M | | ADD |
| GOOGL | $555M | | TRIM |
| VT | $498M | | 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.