Left Lane Capital is a Brooklyn venture firm founded in 2019 by Harley Miller, managing about $3.8 billion and backing growth-stage consumer and internet businesses: GoStudent, Bilt Rewards, M1 Finance, Wayflyer and Moove sit alongside its two Ferret food brands. Blank Street is named in the firm's own portfolio, and Miller took a seat on its board in the August 2026 round. 7th Street Burger's founders credit the firm with building the infrastructure behind their expansion. Amounts and stakes are undisclosed in both cases, and the founders remain the operators.
Assets under management: ~$3.8B (March 2026) · 2 companies on Ferret
7th Street Burger
Dining · 36+ locations — 7th Street Burger is still run by the founders who opened its East Village smashburger stand in 2021. But private-equity fuel from Left Lane Capital and Stripes now races it toward 100 corporate-owned locations in two years.
Blank Street
Coffee · 105+ locations — Blank Street is the venture-backed coffee chain that raised again in August 2026, at a valuation of about $650 million, with 100-plus locations across two countries. Its baristas have been unionizing since 2022, and New York workers won the chain's first union contract.
Firm data last updated September 2026