Exhibit 99.1 PO Box 10, Manitowoc, WI 54221-0010 For further information, contact: Kevin M LeMahieu, Chief Financial Officer Phone: (920) 652-3200 / klemahieu@bankfirst.com NEWS RELEASE [For Immediate Release] Bank First Announces Net Income for the Third Quarter of 2025 Operating Results Net interest income ("NII") during the third quarter of 2025 was $38.3 million, up$1.6 million from the previous quarter and up $2.4 million from the third quarter of 2024. The impact of net accretion and amortization of ...