Series X Capital's $500M Fund Backing Alphabet’s Moonshot Spinouts
Series X CapitalDealroom has a profile for this one. Try Dealroom → , a venture fund linked to Alphabet’s experimental lab X (formerly Google X)Dealroom has a profile for this one. Try Dealroom →, has raised over $500 million to support the transition of the lab’s most promising projects into independent companies. The fund, launched in 2024, is led by Gideon YuDealroom has a profile for this one. Try Dealroom → , a former YouTube executive and Facebook CFO.
Series X Capital was established to provide what insiders describe as “the last mile of incubation” for X’s projects — helping them evolve from research prototypes into commercially viable businesses. The fund operates independently but maintains close ties with Alphabet, which participates as a limited partner and retains minority stakes in spinouts.
The $500 million vehicle reflects Alphabet’s broader shift toward a leaner, more decentralised model for innovation. Rather than housing experimental projects indefinitely, the company now encourages ventures to spin out once they show market potential. This approach allows Alphabet to limit long-term internal costs while exposing its moonshot ideas to external capital and market discipline.
Since its launch, Series X has invested in at least two spinouts: Chorus , a supply chain optimisation venture, and TaaraDealroom has a profile for this one. Try Dealroom → , a telecommunications company developing laser-based internet transmission.
Series X primarily targets family offices and institutional investors, and has reportedly held discussions with select sovereign wealth funds. While Alphabet remains the key strategic partner, the fund’s independent structure allows it to attract external investors seeking access to early-stage deep tech opportunities with origins inside one of the world’s most ambitious R&D environments.
Sources:
Bloomberg
TechCrunch
Yahoo! Finance
Mezha
J.V.
