They are looking at ways of taking over Marconi's finance arm, Marconi Corporation, used by the company to issue its debt. They believe it has a claim over Marconi's operating subsidiaries, which it has funded, so if they win control they would effectively own Marconi's businesses. This would be a blow to Marconi chief executive Mike Parton because it would leave the holding company, in which ordinary investors have their shares, owning few if any assets.