Isomer Capital

Isomer Capital

Joe Schorge founded Isomer Capital in 2015 after more than two decades allocating to private markets, including roles at SVG Capital and Pomona Capital. The London-based firm was purpose-built to channel institutional capital into European venture, a market Schorge viewed as under-allocated relative to the weight of innovation coming out of cities like London, Berlin, Stockholm, and Paris. Isomer operates independently and raises commingled funds alongside bespoke separate accounts for LPs that include pension funds, insurers, and family offices across Europe and Asia. Isomer executes through two primary sleeves: primary fund commitments to early-stage and growth-stage venture managers, and a dedicated secondary program that acquires LP interests in venture funds and portfolios. The firm targets generalist and sector-focused funds across enterprise software, fintech, AI/ML, and digital health. Schorge has publicly stated that Isomer intentionally concentrates its primary commitments with a small number of repeat managers — a conviction-over-spread approach that differentiates it from the scatter-shot FoFs of the 2000s. The secondary book lets the firm acquire positions in growth-stage companies like Revolut, TransferWise, and Graphcore well after the original fund vintages have closed, creating a backdoor to assets that rarely appear in primary fundraises. The firm's scale remains tightly held; Isomer does not disclose a public AUM figure nor a headcount. Its public footprint consists of a lean website and sparse media appearances. Schorge occasionally speaks at LP/GP conferences such as SuperReturn and the BVCA's venture forums, where he argues for portfolio construction that weights manager relationships over volume. No adjacent philanthropic vehicles or operating companies are publicly tied to the firm. Isomer's structural distinction lies in its deliberate focus on European venture's access problem. US LPs in particular have historically struggled to write meaningful checks into funds like Seedcamp, Northzone, or LocalGlobe without a local intermediary. Isomer serves as that intermediary — but unlike a placement agent or a fund-of-funds aggregator that simply parcels out commitments, the firm uses its secondary desk to compound exposure into the winners of those portfolios, effectively running a concentrated re-up strategy on the best-performing underlying companies.