SeaDrill, which is controlled by Norwegian shipping tycoon John Fredriksen, bought 21.41 million Ocean Rig shares at 65 crowns a share.
It also bought an Ocean Rig convertible bond entitling it to 552,632 shares, the company said.
To finance the deals, SeaDrill made a private placement of stock worth about $217.7 million to investors, mainly sellers of Ocean Rig shares.
It placed about 35.7
