{"id":401105604,"url":"https://lda.senate.gov/api/v1/registrants/401105604/?format=json","house_registrant_id":null,"name":"AMENTUM HOLDINGS, INC.","description":"Engineering and technical services","address_1":"300 M Street, SE","address_2":"Suite 880","address_3":null,"address_4":null,"city":"Washington","state":"DC","state_display":"District of Columbia","zip":"20003","country":"US","country_display":"United States of America","ppb_country":"US","ppb_country_display":"United States of America","contact_name":"JOHN A. GASTRIGHT, JR.","contact_telephone":"+1 703-462-7190","dt_updated":"2026-01-30T12:44:04.816682-05:00"}