Founded 2017 by Lee Linden (built & sold Karma to Facebook; co-founded Tapjoy; led Facebook Commerce) and Ben Mahdavi. Based in San Francisco. $377M+ raised; 450+ investments; 78 exits. Deliberately low public profile. Portfolio includes Reddit, Instacart, Epic Games, Mercury, Lava (Oct 2025). In July 2025, Lee Linden also announced GPx, a new $500M+ fund co-led with ex-Founders Fund GP Brian Singerman.