Style
CoreTurnover
Orientation
Concentrated traderJane Street Group’s portfolio reflects a systematic, highly diversified investment philosophy, with a $777.2B AUM spread across over 19,000 positions as of Q1 2026. The largest single holding, SPY at 1.7% of assets, underscores a core reliance on broad market beta, while idiosyncratic bets remain highly fragmented, with the next 14 holdings each comprising just 0.1–0.2%. Technology is the largest classified sector at 20.8%, but nearly 40% of the portfolio is unclassified, suggesting extensive use of derivatives, hedges, or non-traditional exposures that obscure typical sector tilts. This composition reveals a style focused on liquidity and relative value arbitrage over concentrated conviction, with minimal single-name risk and a preference for scalable, market-neutral or volatility-oriented strategies.
| # | Security | Shares | Value | % of Portfolio |
|---|---|---|---|---|
| 1 | State STR Spdr S&P 500 ETF T(SPY) | 44,258,657 | $33.1B | 2.74% |
| 2 | Amazon COM Inc(AMZN) | 14,300,182 | $3.4B | 0.28% |
| 3 | Sandisk Corp(SNDK) | 1,157,795 | $2.6B | 0.22% |
| 4 | Nvidia Corporation(NVDA) | 11,805,610 | $2.4B | 0.20% |
Latest filing, equity positions only
| 5 |
| Invesco QQQ TR(QQQ) |
| 2,790,051 |
| $2.1B |
| 0.17% |
| 6 | Microsoft Corp(MSFT) | 4,452,909 | $1.7B | 0.14% |
| 7 | Seagate Technology Hldngs PL(STX) | 1,473,813 | $1.4B | 0.12% |
| 8 | Coreweave Inc(CRWV) | 13,885,024 | $1.4B | 0.11% |
| 9 | Ishares Inc(IEMG) | 15,858,565 | $1.3B | 0.11% |
| 10 | Meta Platforms Inc(META) | 2,264,034 | $1.3B | 0.11% |
Quarter-over-quarter weight changes
| Sector | Prev % | Curr % | Change |
|---|---|---|---|
| Technology | 20.95% | 25.59% | +4.64% |
| Basic Materials | 3.91% | 1.65% | -2.26% |
| Communication Services | 4.15% | 2.59% | -1.56% |
| Financial Services | 7.53% | 6.04% | -1.49% |
| Industrials | 6.29% | 7.39% | +1.1% |
| Utilities | 2.02% | 0.96% | -1.06% |
| Unclassified | 38.25% | 39.15% | +0.9% |
| Energy | 2.86% | 2.13% | -0.73% |
| Consumer Cyclical | 6.29% | 6.6% | +0.31% |
| Healthcare | 4.68% | 4.94% | +0.26% |
| Consumer Defensive | 1.84% | 1.78% | -0.06% |
| Real Estate | 1.23% | 1.18% | -0.05% |
Quarter-over-quarter weight changes by market cap
| Cap Size | Prev % | Curr % | Change |
|---|---|---|---|
| Unclassified | 38.25% | 39.15% | +0.9% |
| Large Cap | 36.79% | 35.45% | -1.34% |
| Mega Cap | 12.28% | 14.93% | +2.65% |
| Mid Cap | 9.66% | 8.24% | -1.42% |
| Small Cap | 2.73% | 1.97% | -0.76% |
| Micro Cap | 0.29% | 0.25% | -0.04% |
Quarter-over-quarter position changes