{"filing":{"accession_number":"0000860413-26-000081","cik":"0000860413","ticker":"FIBK","company_name":"FIRST INTERSTATE BANCSYSTEM INC","form":"8-K","filing_date":"2026-07-23","report_date":null,"primary_document":"fibk-20260723.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/fibk-20260723.htm"},"events":[{"id":20066,"run_id":18067,"accession_number":"0000860413-26-000081","anchor_item_number":"2.02","event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.97,"summary":"First Interstate BancSystem issued a press release on July 23, 2026 disclosing its financial results for the quarter ended June 30, 2026, including net income of $83.9 million ($0.87 per diluted share), net interest margin of 3.45%, and other key financial metrics.","company_name":"FIRST INTERSTATE BANCSYSTEM INC","ticker":"FIBK","filing_date":"2026-07-23","form":"8-K","submitted_at":null,"items":[{"id":19329,"accession_number":"0000860413-26-000081","item_number":"2.02","item_title":"Results of Operations and Financial Condition.","event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.98,"reasoning":"First Interstate BancSystem issued a press release on July 23, 2026 disclosing its financial results for the quarter ended June 30, 2026, including net income of $83.9 million ($0.87 per diluted share), net interest margin of 3.45%, and other key financial metrics. This is a standard quarterly earnings release furnished as Exhibit 99.1 under Item 2.02 (Results of Operations and Financial Condition), which is the typical vehicle for earnings disclosures.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-07-23T20:16:31.749720+00:00","company_name":"","ticker":null,"filing_date":""},{"id":19330,"accession_number":"0000860413-26-000081","item_number":"7.01","item_title":"Regulation FD Disclosure.","event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.95,"reasoning":"The Item 7.01 disclosure references a corporate presentation posted on July 23, 2026, but the substantive content furnished as Exhibit 99.1 is a press release reporting Second Quarter 2026 earnings. The release discloses net income of $83.9 million ($0.87 per diluted share), net interest margin improvements, loan quality metrics, and capital ratios—all core quarterly financial results material to investors. This is a standard earnings release disclosure, typically filed under Item 2.02 but furnished here under Item 7.01 with Regulation FD safe-harbor language.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-07-23T20:16:31.749720+00:00","company_name":"","ticker":null,"filing_date":""}]},{"id":20067,"run_id":18067,"accession_number":"0000860413-26-000081","anchor_item_number":"8.01","event_type":"dividend_distribution","event_domain":"financial","is_material":true,"confidence":0.95,"summary":"The Board of Directors declared a dividend of $0.47 per share payable August 14, 2026, representing a 5.3% annualized yield.","company_name":"FIRST INTERSTATE BANCSYSTEM INC","ticker":"FIBK","filing_date":"2026-07-23","form":"8-K","submitted_at":null,"items":[{"id":19331,"accession_number":"0000860413-26-000081","item_number":"8.01","item_title":"Other Events.","event_type":"dividend_distribution","event_domain":"financial","is_material":true,"confidence":0.95,"reasoning":"The Item 8.01 disclosure announces a dividend declaration by the Board of Directors on July 22, 2026, of $0.47 per share payable August 14, 2026. This is a routine but material capital allocation decision. The supplemental earnings release (EX-99.1) confirms this dividend declaration and provides context that it represents a 5.3% annualized yield, underscoring its significance to shareholders.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-07-23T20:16:31.749720+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":19329,"accession_number":"0000860413-26-000081","item_number":"2.02","item_title":"Results of Operations and Financial Condition.","event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.98,"reasoning":"First Interstate BancSystem issued a press release on July 23, 2026 disclosing its financial results for the quarter ended June 30, 2026, including net income of $83.9 million ($0.87 per diluted share), net interest margin of 3.45%, and other key financial metrics. This is a standard quarterly earnings release furnished as Exhibit 99.1 under Item 2.02 (Results of Operations and Financial Condition), which is the typical vehicle for earnings disclosures.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-07-23T20:16:31.749720+00:00","company_name":"FIRST INTERSTATE BANCSYSTEM INC","ticker":"FIBK","filing_date":"2026-07-23"},{"id":19330,"accession_number":"0000860413-26-000081","item_number":"7.01","item_title":"Regulation FD Disclosure.","event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.95,"reasoning":"The Item 7.01 disclosure references a corporate presentation posted on July 23, 2026, but the substantive content furnished as Exhibit 99.1 is a press release reporting Second Quarter 2026 earnings. The release discloses net income of $83.9 million ($0.87 per diluted share), net interest margin improvements, loan quality metrics, and capital ratios—all core quarterly financial results material to investors. This is a standard earnings release disclosure, typically filed under Item 2.02 but furnished here under Item 7.01 with Regulation FD safe-harbor language.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-07-23T20:16:31.749720+00:00","company_name":"FIRST INTERSTATE BANCSYSTEM INC","ticker":"FIBK","filing_date":"2026-07-23"},{"id":19331,"accession_number":"0000860413-26-000081","item_number":"8.01","item_title":"Other Events.","event_type":"dividend_distribution","event_domain":"financial","is_material":true,"confidence":0.95,"reasoning":"The Item 8.01 disclosure announces a dividend declaration by the Board of Directors on July 22, 2026, of $0.47 per share payable August 14, 2026. This is a routine but material capital allocation decision. The supplemental earnings release (EX-99.1) confirms this dividend declaration and provides context that it represents a 5.3% annualized yield, underscoring its significance to shareholders.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-07-23T20:16:31.749720+00:00","company_name":"FIRST INTERSTATE BANCSYSTEM INC","ticker":"FIBK","filing_date":"2026-07-23"}]}