London | Origin Energy’s stake in British disruptor Octopus Energy has jumped in value by $US280 million ($420 million) in just six months, after the retail energy and tech play completed a share sale that boosted its valuation by 15 per cent to $US9 billion.

That transaction brought another Australian investor onto Octopus’s tightly held private register: Aware Super helped bankroll existing shareholder Generation Investment Management’s participation in Octopus’s $US370 million secondary share sale.