Debt Norway 04-02-2004 Shipowner boosts stake in debt collection agency John Fredriksen, best known for being the world’s largest tanker owner, has boosted his stake in debt collection agency Aktiv Kapital to nearly 40 per cent. He bought up shares…… Sign in or Upgrade to Continue Reading This news article is over 10 days old. Subscribe today to access all articles with an annual subscription. Become a member Learn more Already a subscriber? Log in here