Stillmark
Fund Size
Investing out of its second fund.
Thesis
Bitcoin-only venture capital. Stillmark invests in companies whose plans, products, and technologies advance Bitcoin's core principles. Early-stage focus with initial checks between $250K-$3M. The firm's mandate is rooted in the belief that Bitcoin is the most important open monetary network and that the companies building on it deserve dedicated capital.
Portfolio
Lightning Labs, Voltage, Amboss, Casa, Ibex Mercado, Satoshi Energy, and other Bitcoin-native infrastructure companies.
Why It Matters
Stillmark was the first VC firm to formally dedicate itself exclusively to Bitcoin. In a landscape where most digital asset VCs invest across dozens of protocols and tokens, Killeen's conviction in Bitcoin-only investing was contrarian and has proven prescient as Bitcoin dominance has reasserted itself.