Adit Singh, an early investor in AI chip startup Cerebras, has joined venture capital firm Mayfield as an infrastructure partner. Singh made his name at Foundation Capital, where he helped source and co-lead Cerebras's first funding round, a bet that paid off handsomely when the chipmaker went public in May 2026 at a valuation of nearly $50 billion, leaving Foundation as its third-largest shareholder with roughly a 7% stake. The move underscores how established venture firms are competing to secure investors with deep semiconductor and infrastructure expertise as AI hardware deals grow larger and more competitive.

At Mayfield, Singh will focus on hardware, infrastructure software, cybersecurity and physical AI, citing the firm's strong semiconductor portfolio—including Upscale AI, valued at $2 billion, and Lumilens, which recently raised $700 million at a $5.5 billion valuation—as a key draw. Since leaving Foundation Capital, Singh co-founded Neotribe Ventures in 2017 and later worked at Cota Capital; he said Mayfield's $3 billion in assets under management, which allows seed checks of up to $20 million, was another major factor given the ballooning size of infrastructure seed deals. Mayfield managing partner Navin Chaddha said it took time to persuade Singh to join despite knowing him for 15 years and sitting on three startup boards together.