Markets /News /Article First Interstate Bancsystem Files Prospectus For Offering Mixed Shelf; Terms Undisclosed Benzinga Newsdesk · May 26, 2026 ·5 months ago News https://www.sec.gov/Archives/edgar/data/860413/000162828026038071/fibks-3asrmay2026.htm https://www.sec.gov/Archives/edgar/data/860413/000162828026038071/fibks-3asrmay2026.htm Read the original