Exhibit 99.1 Kellanova Financial News Release Analyst Contact: John Renwick, CFA (269) 961-9050 Media Contact: Kris Bahner, (269) 961-3799 Kellanova Reports Strong First Quarter Results, Reaffirms Full-Year Outlook Chicago, Ill. - May 2, 2024 — Kellanova (NYSE: K) today announced results for its first quarter of 2024, and reaffirmed its full-year outlook. Highlights: • While net sales in the first quarter were negatively impacted by adverse currency translation and the 2023 divestiture of its business in Ru ...