{"changes":[{"companyHref":"/c/massmagnetics-com","date":"2026-09-25","documentUrl":"https://www.ycombinator.com/companies/mass-magnetics","domain":"massmagnetics.com","fact":"company:added","name":"Mass Magnetics","new":"added","old":"","publisher":"Y Combinator","reason":null,"retrievedAt":"2026-09-25","slug":"massmagnetics-com","status":"sourced","url":"https://whoraisedwhat.com/c/massmagnetics-com"},{"companyHref":"/c/massmagnetics-com","date":"2026-09-25","documentUrl":null,"domain":"massmagnetics.com","fact":"latest round","name":"Mass Magnetics","new":{"amountUsd":null,"date":"","lead":null,"type":null},"old":{"amountUsd":null,"date":"","lead":null,"type":"seed"},"publisher":"yc","reason":null,"retrievedAt":"2026-09-25","slug":"massmagnetics-com","status":"attributed","url":"https://whoraisedwhat.com/c/massmagnetics-com"}],"country":"","description":"USA-made magnetics for robotics and defense.","domain":"massmagnetics.com","employees":null,"founded":null,"fundingTotalQuarantined":false,"githubOrg":null,"githubStars":null,"industry":"unknown","investors":[],"lat":null,"lng":null,"location":null,"name":"Mass Magnetics","rounds":[{"amountQuarantined":false,"amountUsd":null,"currency":"USD","date":"","investors":[],"leadInvestor":null,"source":{"fact":"round","publisher":"yc","retrievedAt":"2026-09-25","status":"attributed","url":null},"status":"attributed","type":null,"url":null}],"slug":"massmagnetics-com","sources":[{"fact":"round","publisher":"yc","retrievedAt":"2026-09-25","status":"attributed","url":null},{"fact":"existence","publisher":"Y Combinator","retrievedAt":"2026-09-25","status":"sourced","url":"https://www.ycombinator.com/companies/mass-magnetics"},{"fact":"description","publisher":"Y Combinator","retrievedAt":"2026-09-25","status":"sourced","url":"https://www.ycombinator.com/companies/mass-magnetics"}],"stage":null,"techStack":[],"totalRaisedUsd":null,"updatedAt":"2026-09-25"}