Exhibit 99.1 Waterstone Financial, Inc. Announces Results of Operations for the Quarter and Twelve Months Ended December 31, 2025. Mortgage Banking Segment WAUWATOSA, WI – 1/28/26– Waterstone Financial, Inc. (NASDAQ: WSBF), holding company for WaterStone Bank, reported net income of $7.7 million, or$0.44 per diluted share, for the quarter ended December 31, 2025 compared to $5.2 million, or$0.28 per diluted share, for the quarter ended December 31, 2024. Net income totaled $7.9 million, or$0.45 per dilut ...