 The Kroger Cos plans to acquire rival Albertsons Companies Inc, one of the biggest deals in US grocery history, could spell good news for Ocado Group PLC LSE:OCDO. Kroger, the largest US grocery store, also happens to be Ocados biggest client, and its merger with Albertsons could provide it with the leverage to compete with the likes of Wal-Mart Inc and Amazon.com. 