{"id":"4789d629-837b-40a7-8e40-2e39d347959f","slug":"tom-stepien","name":"Tom Stepien","bioBrief":"CEO of Amprius Technologies since Jan 2026. Silicon anode lithium-ion batteries (SiCore/SiMaxx, up to 450 Wh/kg). Former CEO of South 8 Technologies.","priorExits":null,"nationality":null,"verificationPosture":"reported","aliases":[],"sources":[{"url":"https://ir.amprius.com/news-events/press-releases/detail/153/amprius-technologies-announces-ceo-transition","title":"Amprius Technologies Announces CEO Transition","sourceName":"Amprius (official)"}],"reviewStatus":"reviewed","createdAt":"2026-08-18T04:14:45.327Z","updatedAt":"2026-08-21T03:18:54.422Z","educations":[],"companyRoles":[{"id":"289d70c0-0185-487c-94a0-dc9eec1b08c6","personId":"4789d629-837b-40a7-8e40-2e39d347959f","companyId":"bc426579-a3b3-4d6d-88b9-542e7ecd34ba","role":"ceo","roleTitle":"CEO","startDate":null,"endDate":null,"currentRole":true,"roleBasis":"verified_secondary","createdAt":"2026-08-18T04:14:46.085Z","company":{"slug":"amprius","name":"Amprius Technologies, Inc."}}],"boardRoles":[],"investorRoles":[],"foundings":[]}