Harmonic raises $100 million to advance mathematical AI model Aristotle

Investing.com -- AI lab Harmonic (NASDAQ:HLIT) has secured $100 million in Series B funding at a valuation of nearly $900 million to accelerate development of its Mathematical Superintelligence (MSI) model called Aristotle.

The funding round was led by Kleiner Perkins with major participation from Paradigm. Ribbit Capital joined as a new investor, while existing backers Sequoia Capital, Index Ventures, and Charlie Cheever also contributed.

Harmonic’s Aristotle model differs from traditional language-based AI systems by using mathematical reasoning to verify accuracy, ensure logical coherence, and transparently flag errors. This approach replaces probabilistic guesses with provable solutions for high-stakes applications.

"Aristotle’s MSI is uniquely suited for mission-critical applications where there is no margin for error, such as generating verified software and by formally verifying existing code – a breakthrough for industries including blockchain, financial services, aerospace and other safety-sensitive systems," said Tudor Achim, CEO of Harmonic.

The company plans to use the funding to accelerate commercialization of Aristotle, which is designed to solve mathematical problems beyond human capabilities. This advancement could drive breakthroughs in theoretical physics and engineering.

Vlad Tenev, Co-Founder and Executive Chairman of Harmonic, noted: "We’re getting closer to AI that can truly reason – quickly, reliably, and at scale. Mathematical Superintelligence is moving from research to real-world applications, and we’re excited for Aristotle to start putting this AI capability into the hands of users."

As part of the investment, Ilya Fushman, partner at Kleiner Perkins and former physicist, will join Harmonic’s board as an observer alongside existing board member Andrew Reed from Sequoia and board observer Jan Hammer from Index.

The company previously raised $75 million in its Series A funding round in September 2024, which was led by Sequoia Capital with participation from Index Ventures, DST Global partners, and Nikesh Arora.

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