Graphcore
The UK's IPU pioneer, now SoftBank's AI-silicon arm.
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Graphcore raised ~$700M for its Intelligence Processing Units and pioneered wafer-on-wafer stacking with TSMC, but missed the LLM procurement wave and was acquired by SoftBank in 2024 — its Bristol team now builds AI silicon within the SoftBank/Arm orbit.
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Record reviewed as of 2026-01-15 — see Methodology.