Panera Brands, parent of Panera Bread, Caribou Coffee and Einstein Bros. Bagels, has signed an agreement with restauranteur Danny Meyer's special purpose acquisition corporation USHG Acquisition Corp. HUGS, -0.41%, which will become a cornerstone partner once Panera completes its planned initial public offering. As part of the agreement, Danny Meyer will invest in Panera Brands and become lead independent director on its board. Panera was taken private by Luxembourg-based JAB, the investment vehicle of Germany's billionaire Reimann family, in 2017, and will continue to be a shareholder in the public company and has agreed to make a dollar-for-dollar investment in the stock equal to the amount of any redemptions from the SPAC.