Uber made a formal €13 billion offer to take over Delivery Hero. The move appeared in a filing with investors. The goal is to push Uber’s services beyond just ride-hailing. Delivery Hero agreed and described the plan as part of its own push to branch out. Bosses mentioned plans to merge food delivery with ride-hailing, but provided few updates on savings. Analysts warned the size of the deal could bring problems. They pointed to tough merging and questions over whether the valuation is fair.