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Air Street Capital Raises $232M Fund III to Back Early-Stage European AI Startups

By AI Watch MENA Editorial Team • March 24, 2026 • 3 min read
A premium, high-tech editorial illustration representing a major European venture capital fund.

London's Air Street Capital has successfully closed a $232 million Fund III, making the firm one of the largest solo venture capital funds in Europe. The new capital will target early-stage AI startups across Europe and North America.

Led by sole general partner Nathan Benaich, the raise represents a significant step up for the firm, which has cemented its reputation as one of the premier early-stage artificial intelligence investors on the continent.

According to the firm's announcement on Monday, check sizes from the newly minted Fund III will range between $500,000 and $15 million, ensuring flexibility to back founders from pre-seed to Series A. Additionally, select growth investments will reach up to $25 million for follow-on opportunities in breakaway portfolio companies.

A Track Record of AI Unicorns and Exits

Air Street Capital has built an intimidating portfolio since its founding, demonstrating an early conviction in companies that have since become industry heavyweights. The firm already backs notable AI unicorns, including:

Beyond massive paper valuations, Air Street has also proven its ability to generate significant cash returns. The firm has witnessed high-profile exits, notably from enterprise AI startup Adept, which was acquired by Amazon, and hardware pioneer Graphcore, which sold to SoftBank.

Scaling Up the Asset Base

With the closing of Fund III, Air Street Capital's total assets under management (AUM) have crossed the $400 million mark, according to the Financial Times.

The progression of the firm's fund sizes tells the story of the broader AI boom—and Benaich's increasing influence within it:

By raising over a quarter-billion dollars as a solo GP, Benaich is proving that ultra-specialised, thesis-driven investors can compete with traditional multi-partner mega-funds for allocations in the world's most competitive AI rounds.

For MENA investors and sovereign wealth funds observing the European tech scene, Air Street's massive scale-up underscores Europe's growing clout as an AI talent hub—one that continues to require significant, sophisticated early-stage capital.