Big Sur Ventures is a Madrid-based venture capital firm investing from pre-seed through Series A in technology companies. Operating since 2012, it backs scalable software and internet businesses alongside deep tech in quantum systems, AI, advanced materials, photonics, microelectronics and nanotechnology. It supports founders with operational advice, transaction experience and commercial networks, typically investing EUR100,000 to EUR1 million initially. Its regulated management company is Big Sur Ventures SGEIC SA, registered with the CNMV as number 142 in 2019. Its BSV IV Ariadne fund finances early-stage deep tech and digital technology companies.
Founded
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Type
Venture capital
Funds2
BSV Ariadne FCRE SA—
Distinct corporate-form European venture capital feeder registered CNMV199 on May23,2025, managed by Big Sur Ventures SGEIC SA. Its March2026 prospectus specifies that all investment commitments are available to acquire primary or secondary interests in BSV IV Ariadne FCRE. It is a feeder into that flagship, not an independent pool investing directly in startups; avoid adding its capital to the underlying fund a second time. Its terms define a closing threshold of EUR20 million, without confirming that amount has been raised.
BSV IV Ariadne FCRE—
European venture capital fund registered CNMV155 on July30,2024, managed by Big Sur Ventures SGEIC SA. Invests in early-stage deep tech and digital technology, including quantum systems, microelectronics, photonics, materials, AI, cloud computing and cybersecurity. The February2025 prospectus sets a EUR100 million fundraising target, which the manager may increase by up to25%; this is not a confirmed final close. SETT announced authorization for a EUR40 million LP investment on July29,2025; that ticket is not the whole-fund size.
Norrsken Evolve
Tolemy Bio$— · Unknown date