Kaiser Aluminum(KALU) - 2025 Q2 - Quarterly Results

Exhibit 99.1 Kaiser Aluminum Corporation Reports Second Quarter 2025 Financial Results Second Quarter 2025 Highlights: (In millions of dollars, except shipments, realized price, and per share amounts) | | | | Quarter Ended | | | | Six Months Ended | | | --- | --- | --- | --- | --- | --- | --- | --- | --- | | | | | June 30, | | | | June 30, | | | | | | | 1 2024 | | | 2024 | 1 | | | 2025 | | | (As Adjusted) | | 2025 | | (As Adjusted) | | Shipments (millions of lbs.) | | 288 | | 297 | | 564 | | 588 | | Net sal ...