| Sep 14, 2026 SForm 4 → | Sep 14, 7:21 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 8,071 | $37.29 | $300,968 | 817,738 | −0.98% | |
| Sep 11, 2026 SForm 4 → | Sep 14, 1:31 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 16,929 | $37.03 | $626,881 | 825,809 | −2.01% | |
| Jul 16, 2026 SForm 4 → | Jul 16, 7:01 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 10,000 | $40.30 | $403,000 | 842,738 | −1.17% | |
| Jun 18, 2026 SForm 4 → | Jun 18, 3:46 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 9,390 | $36.11 | $339,073 | 852,738 | −1.09% | |
| Jun 17, 2026 SForm 4 → | Jun 18, 10:23 am EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 4,500 | $36.29 | $163,305 | 862,128 | −0.52% | |
| Jun 4, 2026 SForm 4 → | Jun 4, 6:41 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 12,892 | $35.58 | $458,697 | 866,628 | −1.47% | |
| Mar 8, 2019 SForm 4 → | Mar 12, 11:36 am EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 15,670 | $41.14 | $644,664 | 143 | −99.1% | plan? |
| Feb 28, 2019 CForm 4 → | Mar 4, 10:55 am EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 2,450 | — | — | 5,000 | — | plan? |
| Nov 21, 2018 SForm 4 → | Nov 23, 11:29 am EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 3,000 | $42.70 | $128,100 | 10,813 | −21.7% | plan? |
| Jun 14, 2018 GForm 4 → | Jun 22, 4:45 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 234 | — | — | 12,954 | — | plan? late |
| Jun 1, 2018 AForm 4 → | Jun 4, 12:32 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 859 | $43.65 | $37,495 | 5,151 | — | plan? |
| May 24, 2018 SForm 4 → | May 25, 3:49 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 19,623 | $43.85 | $860,469 | 4,292 | −82.1% | plan? |
| May 16, 2018 MForm 4 → | May 18, 3:31 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 18,851 | — | — | 23,915 | — | plan? |
| May 7, 2018 SForm 4 → | May 9, 5:25 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 15,244 | $41.12 | $626,833 | 5,054 | −75.1% | plan? |
| May 7, 2018 CMForm 4 → | May 9, 5:25 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 14,911 | $15.56 | $155,509 | 20,298 | — | plan? |
| Feb 23, 2018 AForm 4/A → | May 15, 4:00 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 306 | — | — | 5,397 | — | plan? |
| Feb 23, 2018 AForm 4 → | Mar 1, 4:17 pm EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 306 | — | — | 5,387 | — | plan? late amended |
| Feb 15, 2018 CFSForm 4/A → | May 15, 4:06 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 4,150 | — | — | 5,091 | — | plan? |
| Feb 15, 2018 CDSForm 4 → | Feb 16, 6:15 pm EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 4,160 | — | — | 5,081 | — | plan? amended |
| Dec 1, 2017 DFForm 4/A → | Feb 16, 2018, 5:49 pm EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 315 | — | — | 5,241 | — | plan? |
| Dec 1, 2017 DFForm 4 → | Dec 5, 9:07 pm EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 315 | $39.70 | $3,811 | 5,022 | — | plan? |
| Nov 17, 2017 SForm 4 → | Nov 20, 5:12 pm EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 25,000 | $37.76 | $944,023 | 13,188 | −65.5% | plan? |
| Nov 15, 2017 SForm 4 → | Nov 15, 7:49 pm EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 25,000 | $37.56 | $939,100 | 38,188 | −39.6% | plan? |
| Nov 14, 2017 SForm 4 → | Nov 14, 7:49 pm EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 25,000 | $37.33 | $933,198 | 63,188 | −28.3% | plan? |
| Nov 10, 2017 SForm 4 → | Nov 14, 7:33 pm EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 25,000 | $36.81 | $920,197 | 88,188 | −22.1% | plan? |
| Oct 27, 2017 MForm 4 → | Oct 31, 7:05 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 100,000 | — | — | 113,188 | — | plan? |
| Jun 1, 2017 AForm 4 → | Jun 2, 5:56 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 716 | $34.90 | $24,988 | 4,688 | — | plan? |
| Mar 1, 2017 SForm 5 → | Feb 5, 2019, 4:26 pm EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 4,576 | $39.86 | $182,415 | 0 | −100% | plan? |
| Feb 15, 2017 AFForm 4 → | Feb 17, 7:20 pm EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 1,145 | $41.65 | $7,705 | 5,556 | — | plan? |
| Dec 31, 2016 AFForm 4 → | Jan 4, 2017, 7:50 pm EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 191 | $42.55 | $7,829 | 4,781 | — | plan? |
| Dec 15, 2016 SForm 4 → | Dec 15, 5:42 pm EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 5,000 | $42.02 | $210,075 | 4,576 | −52.2% | plan? |
| Nov 29, 2016 SForm 4 → | Dec 1, 5:36 pm EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 2,000 | $37.50 | $75,000 | 4,958 | −28.7% | plan? |
| Nov 29, 2016 MForm 4 → | Dec 1, 5:36 pm EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 2,000 | $20.62 | $41,240 | 6,958 | — | plan? |
| Nov 22, 2016 CForm 4 → | Dec 15, 5:42 pm EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 9,576 | — | — | 9,576 | — | plan? late |
| Aug 24, 2016 SForm 4 → | Aug 25, 6:57 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 960 | $30.20 | $28,994 | 3,972 | −19.5% | plan? |
| Aug 4, 2016 SForm 4 → | Aug 5, 12:05 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 4,000 | $29.07 | $116,280 | 5,232 | −43.3% | plan? |
| Aug 1, 2016 SForm 4 → | Aug 2, 7:19 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 1,000 | $29.20 | $29,200 | 9,232 | −9.77% | plan? |
| May 27, 2016 SForm 4 → | Jun 1, 6:25 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 1,000 | $28.91 | $28,910 | 10,232 | −8.90% | plan? |
| May 25, 2016 AForm 4 → | May 27, 2:06 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 757 | $28.70 | $21,726 | 11,232 | — | plan? |
| May 23, 2016 SForm 4/A → | Aug 25, 6:49 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 2,300 | $28.50 | $65,540 | 10,175 | −18.4% | plan? |
| May 23, 2016 SForm 4 → | May 25, 3:54 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 2,000 | $28.25 | $56,500 | 10,475 | −16.0% | plan? amended |
| May 3, 2016 CForm 4 → | May 5, 5:53 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 9,260 | — | — | 12,475 | — | plan? |
| Feb 15, 2016 AFForm 4 → | Feb 17, 8:06 pm EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 1,182 | $26.20 | $5,974 | 4,958 | — | plan? |
| Nov 4, 2015 SForm 4/A → | Feb 17, 2016, 8:01 pm EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 6,484 | $28.98 | $187,904 | 3,215 | −66.9% | plan? |
| Nov 4, 2015 SForm 4 → | Nov 6, 6:03 pm EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 6,300 | $28.98 | $182,560 | 3,499 | −64.3% | plan? amended |
| Nov 3, 2015 SForm 4 → | Nov 3, 7:48 pm EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 6,000 | $28.56 | $171,355 | 9,799 | −38.0% | plan? |
| Aug 7, 2015 CForm 4 → | Aug 10, 3:04 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 12,000 | — | — | 15,799 | — | plan? |
| Aug 5, 2015 SForm 4 → | Aug 7, 11:59 am EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 3,000 | $28.22 | $84,660 | 3,799 | −44.1% | plan? |
| May 20, 2015 AForm 4 → | May 22, 12:23 pm EDT | FIRST INTERSTATE BANCSYSTEM INCFIBK | 933 | $27.59 | $25,741 | 6,799 | — | plan? |
| Feb 17, 2015 FForm 4 → | Feb 19, 6:09 pm EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 107 | $26.15 | $2,798 | 4,232 | — | plan? |
| Feb 15, 2015 AFForm 4 → | Feb 18, 6:59 pm EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 1,312 | $26.15 | $4,341 | 4,339 | — | plan? |
| Nov 21, 2014 SForm 4/A → | Feb 17, 2016, 7:52 pm EST | FIRST INTERSTATE BANCSYSTEM INCFIBK | 1,000 | $28.05 | $28,054 | 13,242 | −7.02% | plan? |