Kaiser Aluminum Corporation Announces Retirement of Alfred E. Osborne, Jr. as Board of Directors, Effective June 11, 2024

Kaiser Aluminum Corporation is a producer of semi-fabricated specialty aluminum products. The Company's fabricated aluminum mill products include flat-rolled (plate, sheet, and coil), extruded (rod, bar, hollows, and shapes), drawn (rod, bar, pipe, tube and wire) and certain cast aluminum products. Its business focuses on producing rolled, extruded, and drawn aluminum products used principally for aerospace and defense, aluminum beverage and food packaging, general engineering that include consumer durables, electronics and products for electrical and machinery and equipment applications and automotive products. It provides its products for a range of market applications, including aerospace and high strength (Aero/HS products); beverage and food packaging products (Packaging); general engineering (GE products); automotive (Automotive Extrusions), and other products. Its Automotive Extrusions consist of extruded aluminum products for many North American automotive applications.