Simon Knowles
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Simon Knowles is co-founder, CTO and EVP of Engineering at Graphcore, a British semiconductor company that develops accelerators for AI and machine learning, including its Intelligence Processing Unit (IPU). He conceived the idea for Graphcore with Nigel Toon in January 2012 after the pair had previously sold another semiconductor company together. The Graphcore project began in stealth mode in late 2013, building a processor designed from the ground up for machine intelligence, before the company was officially founded in 2016 in Bristol, UK. Since then, Graphcore has raised multiple rounds of funding from investors including Sequoia Capital, Microsoft, and BMW, reaching unicorn status, and has shipped IPU products used by customers such as Microsoft.
Updated 7 August 2026
Public sources: graphcore.ai Wikipedia
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