Greenlight Capital

David Einhorn's Greenlight Capital is a long/short value-oriented hedge fund best known for famous shorts: Lehman Brothers (2007-2008), Green Mountain Coffee Roasters (2011), and the 2015 GMO short. The long book is less prominent in public discourse but represents the larger portion of Greenlight's exposure - a concentrated, value-style portfolio anchored by Green Brick Partners (GRBK, a residential homebuilder where Einhorn has been the largest position holder for years), Berkshire Hathaway B-shares as ballast, and selective healthcare and gaming-and-leisure names.

The book turns more slowly than Burry's Scion but faster than Buffett's Berkshire - typical position holding period is 2-3 years. Einhorn publishes quarterly investor letters with explicit thesis statements on top positions, making Greenlight one of the more legible long-short managers for retail observation. Recent letters have focused on the long-side opportunity in 'inflation-protected' real-asset names (homebuilders, materials, energy infrastructure) and short-side targets in 'priced for perfection' growth-tech.

For retail traders, Greenlight's 13F is informative as a value-style positioning snapshot but more interpretable when paired with the published investor letters - Einhorn explicitly discusses thesis revisions, position trim/add reasons, and the rationale for new entries. The short book is not disclosed in the 13F (which captures longs only); inferring the short exposure requires letter-reading and pattern matching.