CREATE TABLE table_67421 ("Company" TEXT, "Type" TEXT, "Principal activities" TEXT, "Incorporated in" TEXT, "Group's Equity Shareholding  ( 10 March 2010 ) " TEXT)

Name the type for headquarters principal activites.
SELECT "Type" FROM table_67421 WHERE "Principal activities" = 'headquarters'
SELECT "Type" FROM "table_67421" WHERE "Principal activities" = 'headquarters'