Pay vs Performance Disclosure - USD ($)

12 Months Ended

Dec. 31, 2025

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Dec. 31, 2021

Pay vs Performance Disclosure

Pay vs Performance Disclosure, Table

Pay vs. Performance (“PvP”) Tabular Disclosure — 2025

As required by Section 953(a) of the Dodd-Frank Act, and Item 402(v) of Regulation

S-K,

we are providing the following information about the relationship between “compensation actually paid” (“CAP”) to our CEO and to our other NEOs and certain financial performance metrics of the Company. CAP, as determined under SEC requirements, does not reflect the actual amount of compensation earned by or paid to our executive officers during a covered year. For further information concerning the Company’s

pay-for-performance

philosophy and how the Company aligns executive compensation with the Company’s performance, refer to the Compensation Discussion and Analysis.


					Pay																														Performance
					CEO																				Average of Other NEOs										Value of $100 Initial Investment Based On:
Year (1)					SCT Total Comp - CEO					SCT Total Comp - Prior CEO					Compensation Actually Paid (2) - CEO					Compensation Actually Paid (2) - Prior CEO					SCT Total Compensation					Compensation Actually Paid (2)					Cumulative TSR					Peer Group Cumulative TSR (3)					Net Income ($M)					EPS
		2025				$	4,773,308					—				$	5,685,935					—				$	1,699,924				$	1,198,870				$	121				$	145				$	192.0				$	2.76
		2024									$	4,977,194									$	5,047,454				$	1,340,034				$	1,363,893				$	110				$	119				$	180.1				$	2.39
		2023									$	5,229,962									$	1,552,612				$	1,137,887				$	454,110				$	102				$	104				$	171.2				$	2.24
		2022									$	4,745,379									$	5,290,632				$	1,318,402				$	1,605,440				$	120				$	119				$	155.2				$	2.12
		2021									$	4,577,539									$	3,485,983				$	1,257,052				$	1,082,031				$	110				$	118				$	147.3				$	2.10

(1)

The CEO in reporting years 2021-2024 was Dennis Vermillion; the current CEO for 2025 is Heather Rosentrater. The other NEOs in the 2024 reporting year were Kevin Christie, Heather Rosentrater, Gregory Hesler, and Jason Thackston. The other NEOs in the 2023 reporting year were Mark Thies (ret.), Kevin Christie, Heather Rosentrater, Jason Thackston, and Wayne Manuel. The other NEOs in the 2022 and 2021 reporting years were Mark Thies (ret.), Jason Thackston, Heather Rosentrater, and Kevin Christie.

(2)

Amounts reported in this column are based upon total compensation reported for our CEO and our other NEOs in the SCT for the indicated reporting years and adjusted as shown in the table below. Fair value of equity awards was computed in accordance with the Company’s methodology used for financial reporting purposes.


		2021										2022										2023										2024										2025
		CEO					Other NEOs					CEO					Other NEOs					CEO					Other NEOs					CEO					Other NEOs					CEO					Other NEOs
SCT Reported Compensation			$	4,577,539				$	1,257,052				$	4,745,379				$	1,318,402				$	5,229,962				$	1,137,887				$	4,977,194				$	1,340,034				$	4,773,308				$	1,699,924
Deduct: SCT reported change in pension value			$	(905,751	)			$	(170,893	)			$	—				$	—				$	(1,384,964	)			$	(155,884	)			$	(528,636	)			$	(142,187	)			$	(419,238	)			$	(239,668	)
Add : “CAP” pension value			$	6,658				$	118,549				$	3,813				$	115,378				$	804				$	35,117				$	422				$	51,637				$	62,999				$	56,851
Deduct: Grant date fair values of equity awards reported in “Stock Awards” column of the SCT for the covered FY			$	(1,986,445	)			$	(443,078	)			$	(2,923,157	)			$	(642,502	)			$	(2,728,537	)			$	(505,521	)			$	(2,854,069	)			$	(530,051	)			$	(2,653,743	)			$	(718,294	)
Deduct : For any awards granted in any prior FY forfeited during the covered FY, the fair value at the end of the prior FY			$	—				$	—				$	—				$	—				$	—				$	(104,376	)			$	—				$	—				$	—				$	—
Add: Fair values as of the end of the covered FY of all equity awards granted during the covered FY outstanding and unvested as of the end of such covered FY			$	1,865,542				$	416,058				$	2,626,495				$	577,278				$	1,767,071				$	242,652				$	3,213,321				$	596,766				$	3,742,943				$	414,596
Add : The change in fair value (whether positive or negative) as of the end of the covered FY of any equity awards granted in any prior FY outstanding and unvested as of the end of such covered FY			$	(192,645	)			$	(63,103	)			$	268,274				$	61,234				$	(1,518,971	)			$	(240,617	)			$	(454,563	)			$	(77,953	)			$	(364,976	)			$	(202,047	)
Add : For awards granted and vested in the same FY, the fair value as of the vesting date			$	179,733				$	40,100				$	217,488				$	63,451				$	227,735				$	58,177				$	314,212				$	58,361				$	294,407				$	91,436
Add: The change in fair value (whether positive or negative) as of the vesting date of any awards granted in any prior FY for which all applicable vesting conditions were satisfied at the end of or during the covered FY			$	(197,784	)			$	(108,165	)			$	119,893				$	60,392				$	(183,866	)			$	(36,344	)			$	164,104				$	27,739				$	52,257				$	37,173
Add : The dollar value of any dividend equivalents or other earnings paid on stock or option awards in the covered FY prior to the vesting date not otherwise reflected in the fair value of such award			$	139,135				$	35,511				$	232,446				$	51,807				$	143,377				$	23,019				$	215,470				$	39,548				$	197,978				$	58,899
Total Compensation Actually Paid			$	3,485,983				$	1,082,031				$	5,290,632				$	1,605,440				$	1,552,612				$	454,110				$	5,047,454				$	1,363,893				$	5,685,935				$	1,198,870

(3)	Amounts reported in this column represent returns on an initial $100 investment in the S&P 400 Utilities Index, which we chose as peer group for purposes of the PvP table.

Company Selected Measure Name

EPS

Named Executive Officers, Footnote

(1)

The CEO in reporting years 2021-2024 was Dennis Vermillion; the current CEO for 2025 is Heather Rosentrater. The other NEOs in the 2024 reporting year were Kevin Christie, Heather Rosentrater, Gregory Hesler, and Jason Thackston. The other NEOs in the 2023 reporting year were Mark Thies (ret.), Kevin Christie, Heather Rosentrater, Jason Thackston, and Wayne Manuel. The other NEOs in the 2022 and 2021 reporting years were Mark Thies (ret.), Jason Thackston, Heather Rosentrater, and Kevin Christie.

Peer Group Issuers, Footnote

(3)	Amounts reported in this column represent returns on an initial $100 investment in the S&P 400 Utilities Index, which we chose as peer group for purposes of the PvP table.

Adjustment To PEO Compensation, Footnote

(2)

Amounts reported in this column are based upon total compensation reported for our CEO and our other NEOs in the SCT for the indicated reporting years and adjusted as shown in the table below. Fair value of equity awards was computed in accordance with the Company’s methodology used for financial reporting purposes.


		2021										2022										2023										2024										2025
		CEO					Other NEOs					CEO					Other NEOs					CEO					Other NEOs					CEO					Other NEOs					CEO					Other NEOs
SCT Reported Compensation			$	4,577,539				$	1,257,052				$	4,745,379				$	1,318,402				$	5,229,962				$	1,137,887				$	4,977,194				$	1,340,034				$	4,773,308				$	1,699,924
Deduct: SCT reported change in pension value			$	(905,751	)			$	(170,893	)			$	—				$	—				$	(1,384,964	)			$	(155,884	)			$	(528,636	)			$	(142,187	)			$	(419,238	)			$	(239,668	)
Add : “CAP” pension value			$	6,658				$	118,549				$	3,813				$	115,378				$	804				$	35,117				$	422				$	51,637				$	62,999				$	56,851
Deduct: Grant date fair values of equity awards reported in “Stock Awards” column of the SCT for the covered FY			$	(1,986,445	)			$	(443,078	)			$	(2,923,157	)			$	(642,502	)			$	(2,728,537	)			$	(505,521	)			$	(2,854,069	)			$	(530,051	)			$	(2,653,743	)			$	(718,294	)
Deduct : For any awards granted in any prior FY forfeited during the covered FY, the fair value at the end of the prior FY			$	—				$	—				$	—				$	—				$	—				$	(104,376	)			$	—				$	—				$	—				$	—
Add: Fair values as of the end of the covered FY of all equity awards granted during the covered FY outstanding and unvested as of the end of such covered FY			$	1,865,542				$	416,058				$	2,626,495				$	577,278				$	1,767,071				$	242,652				$	3,213,321				$	596,766				$	3,742,943				$	414,596
Add : The change in fair value (whether positive or negative) as of the end of the covered FY of any equity awards granted in any prior FY outstanding and unvested as of the end of such covered FY			$	(192,645	)			$	(63,103	)			$	268,274				$	61,234				$	(1,518,971	)			$	(240,617	)			$	(454,563	)			$	(77,953	)			$	(364,976	)			$	(202,047	)
Add : For awards granted and vested in the same FY, the fair value as of the vesting date			$	179,733				$	40,100				$	217,488				$	63,451				$	227,735				$	58,177				$	314,212				$	58,361				$	294,407				$	91,436
Add: The change in fair value (whether positive or negative) as of the vesting date of any awards granted in any prior FY for which all applicable vesting conditions were satisfied at the end of or during the covered FY			$	(197,784	)			$	(108,165	)			$	119,893				$	60,392				$	(183,866	)			$	(36,344	)			$	164,104				$	27,739				$	52,257				$	37,173
Add : The dollar value of any dividend equivalents or other earnings paid on stock or option awards in the covered FY prior to the vesting date not otherwise reflected in the fair value of such award			$	139,135				$	35,511				$	232,446				$	51,807				$	143,377				$	23,019				$	215,470				$	39,548				$	197,978				$	58,899
Total Compensation Actually Paid			$	3,485,983				$	1,082,031				$	5,290,632				$	1,605,440				$	1,552,612				$	454,110				$	5,047,454				$	1,363,893				$	5,685,935				$	1,198,870

Non-PEO NEO Average Total Compensation Amount

$ 1,699,924

$ 1,340,034

$ 1,137,887

$ 1,318,402

$ 1,257,052

Non-PEO NEO Average Compensation Actually Paid Amount

$ 1,198,870

1,363,893

454,110

1,605,440

1,082,031

Adjustment to Non-PEO NEO Compensation Footnote

(2)

Amounts reported in this column are based upon total compensation reported for our CEO and our other NEOs in the SCT for the indicated reporting years and adjusted as shown in the table below. Fair value of equity awards was computed in accordance with the Company’s methodology used for financial reporting purposes.


		2021										2022										2023										2024										2025
		CEO					Other NEOs					CEO					Other NEOs					CEO					Other NEOs					CEO					Other NEOs					CEO					Other NEOs
SCT Reported Compensation			$	4,577,539				$	1,257,052				$	4,745,379				$	1,318,402				$	5,229,962				$	1,137,887				$	4,977,194				$	1,340,034				$	4,773,308				$	1,699,924
Deduct: SCT reported change in pension value			$	(905,751	)			$	(170,893	)			$	—				$	—				$	(1,384,964	)			$	(155,884	)			$	(528,636	)			$	(142,187	)			$	(419,238	)			$	(239,668	)
Add : “CAP” pension value			$	6,658				$	118,549				$	3,813				$	115,378				$	804				$	35,117				$	422				$	51,637				$	62,999				$	56,851
Deduct: Grant date fair values of equity awards reported in “Stock Awards” column of the SCT for the covered FY			$	(1,986,445	)			$	(443,078	)			$	(2,923,157	)			$	(642,502	)			$	(2,728,537	)			$	(505,521	)			$	(2,854,069	)			$	(530,051	)			$	(2,653,743	)			$	(718,294	)
Deduct : For any awards granted in any prior FY forfeited during the covered FY, the fair value at the end of the prior FY			$	—				$	—				$	—				$	—				$	—				$	(104,376	)			$	—				$	—				$	—				$	—
Add: Fair values as of the end of the covered FY of all equity awards granted during the covered FY outstanding and unvested as of the end of such covered FY			$	1,865,542				$	416,058				$	2,626,495				$	577,278				$	1,767,071				$	242,652				$	3,213,321				$	596,766				$	3,742,943				$	414,596
Add : The change in fair value (whether positive or negative) as of the end of the covered FY of any equity awards granted in any prior FY outstanding and unvested as of the end of such covered FY			$	(192,645	)			$	(63,103	)			$	268,274				$	61,234				$	(1,518,971	)			$	(240,617	)			$	(454,563	)			$	(77,953	)			$	(364,976	)			$	(202,047	)
Add : For awards granted and vested in the same FY, the fair value as of the vesting date			$	179,733				$	40,100				$	217,488				$	63,451				$	227,735				$	58,177				$	314,212				$	58,361				$	294,407				$	91,436
Add: The change in fair value (whether positive or negative) as of the vesting date of any awards granted in any prior FY for which all applicable vesting conditions were satisfied at the end of or during the covered FY			$	(197,784	)			$	(108,165	)			$	119,893				$	60,392				$	(183,866	)			$	(36,344	)			$	164,104				$	27,739				$	52,257				$	37,173
Add : The dollar value of any dividend equivalents or other earnings paid on stock or option awards in the covered FY prior to the vesting date not otherwise reflected in the fair value of such award			$	139,135				$	35,511				$	232,446				$	51,807				$	143,377				$	23,019				$	215,470				$	39,548				$	197,978				$	58,899
Total Compensation Actually Paid			$	3,485,983				$	1,082,031				$	5,290,632				$	1,605,440				$	1,552,612				$	454,110				$	5,047,454				$	1,363,893				$	5,685,935				$	1,198,870

Compensation Actually Paid vs. Total Shareholder Return

Compensation Actually Paid vs. Net Income

Compensation Actually Paid vs. Company Selected Measure

Total Shareholder Return Vs Peer Group

Tabular List, Table

Most Important Measures Linking Avista NEO Pay to Performance — 2025

The following are the most important financial and

non-financial

performance measures, as determined by the Company, that link compensation actually paid to our NEOs to the Company’s performance for the most recently completed fiscal year.

•

Earnings per Share (“EPS”)

•

3-Year

Relative TSR

•

Cost Per Customer

Total Shareholder Return Amount

$ 121

110

102

120

110

Peer Group Total Shareholder Return Amount

145

119

104

119

118

Net Income (Loss)

$ 192,000,000

$ 180,100,000

$ 171,200,000

$ 155,200,000

$ 147,300,000

Company Selected Measure Amount

2.76

2.39

2.24

2.12

2.1

Pay vs Performance Disclosure

Earnings per Share (“EPS”)

Pay vs Performance Disclosure

3-Year Relative TSR

Pay vs Performance Disclosure

Cost Per Customer

Dennis Vermillion [Member]

Pay vs Performance Disclosure

PEO Total Compensation Amount

$ 4,977,194

$ 5,229,962

$ 4,745,379

$ 4,577,539

PEO Actually Paid Compensation Amount

$ 5,047,454

$ 1,552,612

$ 5,290,632

$ 3,485,983

Dennis Vermillion

Dennis Vermillion

Dennis Vermillion

Dennis Vermillion

Heather Rosentrater [Member]

Pay vs Performance Disclosure

PEO Total Compensation Amount

$ 4,773,308

PEO Actually Paid Compensation Amount

$ 5,685,935

Heather Rosentrater

PEO | Dennis Vermillion [Member] | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

$ (2,854,069)

$ (2,728,537)

$ (2,923,157)

$ (1,986,445)

PEO | Dennis Vermillion [Member] | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

3,213,321

1,767,071

2,626,495

1,865,542

PEO | Dennis Vermillion [Member] | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

314,212

227,735

217,488

179,733

PEO | Dennis Vermillion [Member] | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(454,563)

(1,518,971)

268,274

(192,645)

PEO | Dennis Vermillion [Member] | Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

164,104

(183,866)

119,893

(197,784)

PEO | Dennis Vermillion [Member] | Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

215,470

143,377

232,446

139,135

PEO | Dennis Vermillion [Member] | SCT reported change in pension value [Member]

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(528,636)

(1,384,964)

0

(905,751)

PEO | Dennis Vermillion [Member] | "CAP" pension value [Member]

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

422

804

3,813

6,658

PEO | Dennis Vermillion [Member] | For any awards granted in any prior FY forfeited during the covered FY, the fair value at the end of the prior FY [Member]

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

0

0

0

0

PEO | Heather Rosentrater [Member] | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

$ (2,653,743)

PEO | Heather Rosentrater [Member] | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

3,742,943

PEO | Heather Rosentrater [Member] | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

294,407

PEO | Heather Rosentrater [Member] | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(364,976)

PEO | Heather Rosentrater [Member] | Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

52,257

PEO | Heather Rosentrater [Member] | Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

197,978

PEO | Heather Rosentrater [Member] | SCT reported change in pension value [Member]

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(419,238)

PEO | Heather Rosentrater [Member] | "CAP" pension value [Member]

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

62,999

PEO | Heather Rosentrater [Member] | For any awards granted in any prior FY forfeited during the covered FY, the fair value at the end of the prior FY [Member]

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

0

Non-PEO NEO | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(718,294)

(530,051)

(505,521)

(642,502)

(443,078)

Non-PEO NEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

414,596

596,766

242,652

577,278

416,058

Non-PEO NEO | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

91,436

58,361

58,177

63,451

40,100

Non-PEO NEO | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(202,047)

(77,953)

(240,617)

61,234

(63,103)

Non-PEO NEO | Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

37,173

27,739

(36,344)

60,392

(108,165)

Non-PEO NEO | Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

58,899

39,548

23,019

51,807

35,511

Non-PEO NEO | SCT reported change in pension value [Member]

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(239,668)

(142,187)

(155,884)

0

(170,893)

Non-PEO NEO | "CAP" pension value [Member]

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

56,851

51,637

35,117

115,378

118,549

Non-PEO NEO | For any awards granted in any prior FY forfeited during the covered FY, the fair value at the end of the prior FY [Member]

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

$ 0

$ 0

$ (104,376)

$ 0

$ 0