Hedge funds stayed heavily exposed to large-cap technology through the first half of 2026, but the short book is more interesting, as usual. Hazeltree‘s H1 Review found Charter Communications was North America’s most crowded large-cap short, while short participation increased by more than 10% month over month in Oracle and Nebius Group.
The report is based on anonymized positioning across approximately 16,000 securities held by more than 600 global funds on Hazeltree’s securities-finance platform. Its crowding score runs from 0 to 99 and measures how widely a security is held long or short within a regional market-cap group. It is a relative ranking, not position size or a directional forecast.
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