Rederiaktiebolaget Eckerö is the parent company of the Eckerö Group.

The group includes the wholly owned subsidiaries Eckerö Linjen Ab (Business ID: 1974073-8), Rederi Eckerö Sverige AB (CRN: 556181-4350), Williams Buss Ab (Business ID: 0830348-7), Eckerö Line Ab Oy (Business ID: 0967682-4), Eckerö Cruises AB (CRN: 556160-6244), Eckerö Shipping Ab Ltd (Business ID: 0498400-0) and Eckerö Link Ab (Business ID: 2590701-2).