The Silicon Valley-based executive, who joined the company as president in September 2023, replaces Arun Iyengar. Untether has also added Amir Salek, a former Google and Nvidia executive, to its board. (The Logic)

Talking point: The firm develops inference chips that clients use to run AI applications like self-driving cars or automated financial portfolio management. Untether has been working on its second-generation semiconductors, which are designed to be more power efficient and better integrated with the software necessary to run them. As the chip business adapts to machine learning, there’s “potential for shifts in just how AI gets deployed and delivered,” Walker told my colleague Anita last month. Untether has more than 100 employees, with most in Toronto. The company has taken US$153.5 million in venture capital to date, per PitchBook data, including a US$125-million round in July 2021. Backers include the Canada Pension Plan Investment Board, Radical Ventures and Intel. Walker said Untether is currently fundraising.