Exhibit 99.01 Eastman Announces Fourth-Quarter and Full-Year 2025 Financial Results KINGSPORT, Tenn., January 29, 2026 – Eastman Chemical Company (NYSE:EMN) announced its fourth-quarter and full-year 2025 financial results. | (In millions, | except | per | share | amounts; | unaudited) | 4Q2025 | 4Q2024 | FY25 | FY24 | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | Sales revenue | | | | | | $1,973 |$2,245 | $8,752 |$9,382 | | Earnings | before | interest | and | taxes | ("EBIT") | 64 | 34 ...