Exhibit 99.1 News Release International Paper Reports Second Quarter 2025 Results MEMPHIS, Tenn. – July 31, 2025 – International Paper (NYSE: IP; LSE: IPC) (the "Company") today reported second quarter 2025 net earnings (loss) of $75 million, or$0.14 per diluted share, and adjusted operating earnings (non-GAAP) of $105 million, or$0.20 per diluted share. Second quarter 2025 net sales were $6.8 billion. "I'm pleased to see our teams gaining momentum as we advance our transformation journey," said Chief Exe ...