{"slice":{"kind":"company","id":"national-gypsum","label":"National Gypsum","href":"/companies/national-gypsum","apiPath":"/api/slices/company/national-gypsum","lastmod":"2026-09-09"},"company":{"id":"national-gypsum","name":"National Gypsum","url":"https://www.nationalgypsum.com","description":"Family-owned (Spangler family); second-largest US wallboard producer; operates 17 gypsum board plants; one of six major producers controlling ~81% of global wallboard market.","roles":["supplier"],"jobs":[],"sectors":[],"ownershipType":"bootstrapped","lifecycle":"unknown","investors":[],"markets":[]},"ownershipGraph":{"parent":null,"siblings":[],"acquisitions":[],"acquiredBy":null},"capital":{"rounds":[],"totalRaisedUsd":null,"publicListing":null,"revenueEstimateUsd":null},"provenance":{"sources":["https://www.nationalgypsum.com","https://en.wikipedia.org/wiki/National_Gypsum"],"capitalSources":[]},"tools":[]}