DarkIris

DarkIris

DarkIris was formed in 2014 by Jeff Fluhr, the co-founder and former CEO of StubHub, following the secondary ticket marketplace's 2007 acquisition by eBay. The firm operates as a single family office managing Fluhr's technology liquidity, with an investment posture built on Fluhr's experience as both a founder and an active angel investor in the Bay Area ecosystem. The firm deploys capital primarily into seed and early Series A rounds, with check sizes typically ranging from $100K to $500K per initial investment. DarkIris concentrates on enterprise software, fintech, and digital health, and has backed companies including Plaid, Eaze, and Rigetti Computing. The geographic focus skews heavily toward San Francisco and New York. Rather than leading rounds, Fluhr co-invests alongside established seed funds, a posture that lets the office maintain a diversified portfolio without building internal sourcing infrastructure. DarkIris operates without a dedicated team, functioning as Fluhr's direct investment vehicle. The office has participated in over 60 deals since inception, with deal flow sourced from Fluhr's personal network of founders and venture capitalists. A portion of capital also flows into select venture funds, including those managed by General Catalyst and First Round Capital. Fluhr has not publicly disclosed a succession or institutionalization plan for the office. DarkIris' structural differentiator is the operator density behind every allocation: Fluhr invests his own capital exclusively, with no external LPs, no fundraising cycles, and an investment committee of one. That architecture removes the timing pressure and consensus-building that shape multi-principal family offices and institutional venture firms, giving him the latitude to write conviction checks faster than a typical fund.