noteholder
From Longman Business Dictionarynoteholdernote‧hold‧er /ˈnəʊtˌhəʊldəˈnoʊtˌhoʊldər/ noun [countable] American EnglishFINANCE a person or organization that owns notes (=bonds etc) in a company$180 million is owed to noteholders.The noteholders are blocking completion of the sale.