FIRST INTERSTATE BANCSYSTEM INC

For the period ended Jun 30, 2026. Filed Aug 3, 2026.

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A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Jun 30, 2026 · Filed Aug 3, 2026

FIBK$38.00-1.1%Stored close · as of Nov 10, 2026

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Contents

Consolidated Statements of Changes in Stockholders’ Equity

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIESCONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY (In millions, except share and per share data)(Unaudited)
	Three Months Ended June 30,
	Commonstock	Retainedearnings	Accumulatedothercomprehensiveloss	Totalstockholders’equity
Balance at March 31, 2026	$2,265.5	$1,288.7	$(195.7)	$3,358.5
Net income	—	83.9	—	83.9
Other comprehensive loss, net of tax benefit	—	—	(7.8)	(7.8)
Common stock transactions:
1,935,883 common shares purchased and retired	(69.5)	—	—	(69.5)
80,943 non-vested common shares issued	—	—	—	—
54,412 non-vested common shares forfeited or canceled	—	—	—	—
Stock-based compensation expense	3.5	—	—	3.5
Common stock cash dividends declared ($0.47 per share)	—	(46.0)	—	(46.0)
Balance at June 30, 2026	$2,199.5	$1,326.6	$(203.5)	$3,322.6
	Commonstock	Retainedearnings	Accumulatedothercomprehensiveloss	Totalstockholders’equity
Balance at March 31, 2025	$2,460.2	$1,168.6	$(267.5)	$3,361.3
Net income	—	71.7	—	71.7
Other comprehensive income, net of tax expense	—	—	34.6	34.6
Common stock transactions:
1,018 common shares purchased and retired	—	—	—	—
35,352 non-vested common shares issued	—	—	—	—
69,918 non-vested common shares forfeited or canceled	—	—	—	—
Stock-based compensation expense	3.3	—	—	3.3
Common stock cash dividends declared ($0.47 per share)	—	(49.1)	—	(49.1)
Balance at June 30, 2025	$2,463.5	$1,191.2	$(232.9)	$3,421.8
See accompanying notes to unaudited consolidated financial statements.

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIESCONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY (In millions, except share and per share data)(Unaudited)
	Six Months Ended June 30,
	Commonstock	Retainedearnings	Accumulated othercomprehensive loss	Totalstockholders’equity
Balance at December 31, 2025	$2,350.9	$1,274.2	$(178.1)	$3,447.0
Net income	—	144.1	—	144.1
Other comprehensive loss, net of tax benefit	—	—	(25.4)	(25.4)
Common stock transactions:
4,412,976 common shares purchased and retired	(157.2)	—	—	(157.2)
415,154 non-vested common shares issued	—	—	—	—
197,185 non-vested common shares forfeited or canceled	—	—	—	—
Stock-based compensation expense	5.8	—	—	5.8
Common stock cash dividends declared ($0.94 per share)	—	(91.7)	—	(91.7)
Balance at June 30, 2026	$2,199.5	$1,326.6	$(203.5)	$3,322.6
	Commonstock	Retainedearnings	Accumulatedothercomprehensiveloss	Totalstockholders’equity
Balance at December 31, 2024	$2,459.5	$1,166.4	$(321.9)	$3,304.0
Net income	—	121.9	—	121.9
Other comprehensive income, net of tax expense	—	—	89.0	89.0
Common stock transactions:
107,648 common shares purchased and retired	(3.2)	—	—	(3.2)
515,641 non-vested common shares issued	—	—	—	—
119,780 non-vested common shares forfeited or canceled	—	—	—	—
Stock-based compensation expense	7.2	—	—	7.2
Common stock cash dividends declared ($0.94 per share)	—	(97.1)	—	(97.1)
Balance at June 30, 2025	$2,463.5	$1,191.2	$(232.9)	$3,421.8
See accompanying notes to unaudited consolidated financial statements.

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