Joel Jean-Mairet, Managing Partner at Ysios Capital, San Sebastian, Pais Vasco, Spain — verified investor profile. See sector focus and contact routes.
Joël Jean-Mairet is the Managing Partner and Co-Founder of Ysios Capital, a life science venture capital firm based in San Sebastián and Barcelona, Spain. He is a seasoned life sciences investor and entrepreneur who previously served as co-founder and CEO of Glycart, which was sold to Roche in 2005 for 235 million Swiss francs after contributing to the development of the FDA-approved drug Gazyva. Ysios Capital focuses on biotech start-ups in the life sciences sector, with an investment range of $1 million to $7.5 million and a sweet spot at $1 million. The firm has recorded 22 investments and manages a current fund size of €126.4 million. Notable portfolio companies include Glycart (now part of Roche), though specific current portfolio names beyond this historical success are not detailed in available sources. Jean-Mairet is recognized as a leading figure in health venture capital in Spain, with a distinctive track record of regulatory approvals for four drugs and five medical devices. He has not published public writing cited in the search results, but his career reflects a strong point of view on translating scientific innovation into commercially viabl
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