First Interstate Bancsystem market cap FIBK

Share price times shares outstanding: what the whole company sells for, since 2011.

First Interstate Bancsystem is worth $3.5B at the close on Oct 23, 2026, at $36.78 a share.

That is up 6% over the last year and up 35% over five years.

Its highest close in our data was $4.9B in Nov 2022.

Market cap over time

Year	End of year	Low	High	Change
2026 so far	$3.5B	$3.3B	$4B	−5%
2025	$3.7B	$2.5B	$3.7B	+9%
2024	$3.4B	$2.6B	$3.7B	+5%
2023	$3.2B	$2.3B	$4.1B	−20%
2022	$4B	$2B	$4.9B	+60%
2021	$2.5B	$2.4B	$3.2B	−2%
2020	$2.6B	$1.7B	$2.7B	−6%
2019	$2.7B	$2.2B	$2.8B	+24%
2018	$2.2B	$2.2B	$2.6B	−2%
2017	$2.3B	$1.6B	$2.3B	+18%
2016	$1.9B	$1.2B	$1.9B	+45%
2015	$1.3B	$1.1B	$1.4B	+4%
2014	$1.3B	$1.1B	$1.3B	−0%
2013	$1.3B	$685.1M	$1.3B	+95%
2012	$652.7M	$569.9M	$676.1M	+17%
2011	$560M	$433.1M	$566.7M	n/a

Companies in Banks - Regional nearest First Interstate Bancsystem's size, closest first, today.

Company	Market cap
FIBKFirst Interstate Bancsystem	$3.5B
MCHBMechanics Bancorp	$3.4B
SBCFSeacoast Banking Corp of Florida	$3.2B
RNSTRenasant	$3.8B
BKUBankUnited	$3.1B
INDBIndependent Bank	$4B
FHBFirst Hawaiian	$3.1B
CVBFCVB Financial	$4B
PFSProvident Financial Services	$3B
IBOCInternational Bancshares	$4.1B
FBPFirst Bancorp	$4.2B
Peer median	$3.6B