Boxes of various Kellogg’s cereals are displayed on shelves at a Walmart Supercenter on May 6, 2025 in Austin, Texas. Brandon Bell | Getty ImagesShares of…

Signage for Kellanova outside the New York Stock Exchange on Sept. 5, 2023.APShares of Kellanova closed up 16% on Monday on reports of buyout interest.M&M’s owner…