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First Interstate Bancsystem Inc

FIBK
Exchange
Nasdaq
Industry
State Commercial Banks
SEC CIK
0000860413

In the last 90 days, First Interstate Bancsystem Inc insiders filed 0 open-market purchases and 7 sales; 299 institutions reported holding it in 13F filings for Q2 2026, worth $3.52B in total; no superinvestor holds it.

SEC filings

10-K, 10-Q, 8-K, 20-F and 40-F reports First Interstate Bancsystem Inc filed with the SEC, newest first.

Livermore lists each filing's form, 8-K items and dates only. To read a filing, open it on SEC.gov; an 8-K's press release or other attachments, such as exhibit 99.1 for Item 2.02, are in the filing index.

SEC filings by First Interstate Bancsystem Inc
FiledForm8-K itemsPeriodDocumentFiling index
Nov 2, 202610-Q–Sep 30, 2026SECIndex
Oct 22, 20268-K2.027.018.019.01Oct 22, 2026SECIndex
Sep 16, 20268-K5.029.01Sep 14, 2026SECIndex
Aug 21, 20268-K5.029.01Aug 21, 2026SECIndex
Aug 3, 202610-Q–Jun 30, 2026SECIndex
Jul 23, 20268-K2.027.018.019.01Jul 23, 2026SECIndex
Jul 16, 20268-K5.029.01Jul 13, 2026SECIndex
Jul 9, 20268-K5.029.01Jul 9, 2026SECIndex
May 29, 20268-K5.025.035.079.01May 27, 2026SECIndex
May 13, 20268-K5.029.01May 11, 2026SECIndex
May 7, 202610-Q–Mar 31, 2026SECIndex
Apr 29, 20268-K2.027.018.019.01Apr 29, 2026SECIndex
Feb 26, 202610-K–Dec 31, 2025SECIndex
Jan 28, 20268-K2.027.018.019.01Jan 28, 2026SECIndex
Nov 18, 20258-K5.029.01Nov 14, 2025SECIndex
Nov 6, 202510-Q–Sep 30, 2025SECIndex
Oct 29, 20258-K2.027.018.01Oct 29, 2025SECIndex
Oct 16, 20258-K7.019.01Oct 16, 2025SECIndex
Oct 14, 20258-K7.019.01Oct 10, 2025SECIndex
Sep 9, 20258-K5.027.019.01Sep 3, 2025SECIndex
Sep 2, 20258-K5.029.01Aug 29, 2025SECIndex
Aug 29, 20258-K/A5.02Aug 13, 2025SECIndex
Aug 28, 20258-K8.019.01Aug 28, 2025SECIndex
Aug 18, 20258-K1.028.019.01Aug 15, 2025SECIndex
Aug 15, 20258-K5.029.01Aug 13, 2025SECIndex
Aug 6, 202510-Q–Jun 30, 2025SECIndex
Jul 29, 20258-K2.027.018.019.01Jul 29, 2025SECIndex
Jul 3, 20258-K8.019.01Jul 3, 2025SECIndex
Jun 10, 20258-K1.012.039.01Jun 10, 2025SECIndex
Jun 6, 20258-K7.018.019.01Jun 5, 2025SECIndex
Jun 2, 20258-K7.019.01Jun 2, 2025SECIndex
Jun 2, 20258-K5.027.019.01Jun 1, 2025SECIndex
May 23, 20258-K5.025.035.079.01May 20, 2025SECIndex
May 7, 202510-Q–Mar 31, 2025SECIndex
Apr 29, 20258-K2.027.018.019.01Apr 29, 2025SECIndex
Apr 28, 20258-K7.019.01Apr 28, 2025SECIndex
Mar 19, 20258-K5.029.01Mar 14, 2025SECIndex
Feb 28, 202510-K–Dec 31, 2024SECIndex
Feb 26, 20258-K5.029.01Feb 24, 2025SECIndex
Feb 25, 20258-K5.027.019.01Feb 20, 2025SECIndex
Jan 29, 20258-K2.027.018.019.01Jan 29, 2025SECIndex
Jan 10, 20258-K2.022.069.01Jan 3, 2025SECIndex
Nov 4, 202410-Q–Sep 30, 2024SECIndex
Oct 24, 20248-K2.027.018.019.01Oct 24, 2024SECIndex
Oct 9, 20248-K5.027.019.01Oct 9, 2024SECIndex
Aug 2, 202410-Q–Jun 30, 2024SECIndex
Jul 25, 20248-K2.027.018.019.01Jul 25, 2024SECIndex
Jul 12, 20248-K5.029.01Jul 8, 2024SECIndex
Jun 14, 20248-K5.029.01Jun 14, 2024SECIndex
May 23, 20248-K5.025.077.01May 20, 2024SECIndex