Avista CEO converts performance shares, withholds stock

Avista Corp President & CEO Heather Lynn Rosentrater reported equity award activity and related tax withholding.

Rhea-AI Filing Summary

Avista Corp President & CEO Heather Lynn Rosentrater reported equity award activity and related tax withholding. She exercised or converted a 2023 performance share award for 6,879 units at a conversion price of $0.00, consistent with the footnote that shares are awarded if performance goals are met. This resulted in an acquisition of 2,752 shares of common stock at $0.00, bringing her direct common stock holdings to 78,803 shares before tax withholding. To cover income taxes on the performance shares acquired on March 2, 2026, 671 common shares were automatically withheld at $39.92 per share, leaving her with 78,132 directly held shares. The filing also notes 695 common shares held indirectly through her spouse’s plan.

Insider Trade Summary

6,879 shares exercised/converted

Exercise 4 txns

Insider Rosentrater Heather Lynn

Role President & CEO

Type	Security	Shares	Price	Value
Exercise	Conversion of 2023 Performance Shares (CEPS)	6,879	$0.00	$0.00
Exercise	Common Stock - Performance Shares (CEPS)	2,752	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock - Performance Shares (CEPS)	671	$39.92	$27K
holding	Common Stock in Spouse's Plan	--	--	--

Holdings After Transaction: Conversion of 2023 Performance Shares (CEPS) — 0 contracts (Direct); Common Stock - Performance Shares (CEPS) — 78,132 shares (Direct); Common Stock in Spouse's Plan — 695 shares (Indirect, Shares Held by Spouse)

Footnotes (2)

1. F1. No conversion price. Shares awarded if performance measure is met.
2. F2. Shares withheld to pay income tax on Performance Shares acquired 3/2/26.

FAQ

What insider transactions did AVISTA CORP (AVA) CEO Heather Rosentrater report?

Heather Rosentrater reported a performance share conversion and related tax withholding. She converted 6,879 2023 performance share units, received 2,752 common shares at $0.00, and had 671 shares withheld at $39.92 to satisfy income tax on the award.

How many AVISTA CORP (AVA) shares does the CEO hold after this Form 4 filing?

After these transactions, Heather Rosentrater directly holds 78,132 AVISTA CORP common shares. The filing also reports 695 additional common shares held indirectly through her spouse’s plan, reflecting both her direct and indirect ownership positions as of the reported date.

Was the AVISTA CORP (AVA) CEO’s Form 4 transaction an open‑market stock sale?

No, the Form 4 shows tax withholding, not an open‑market sale. The 671 shares labeled with code “F” were withheld at $39.92 per share specifically to pay income taxes on performance shares acquired on March 2, 2026, per the footnote.

What does the 2023 performance share (CEPS) conversion mean for AVISTA CORP (AVA) CEO compensation?

The conversion reflects equity compensation earned under a 2023 performance share award. Footnotes state there is no conversion price and shares are awarded if performance measures are met, resulting in 6,879 units exercised and 2,752 common shares credited at no cost.

How is the AVISTA CORP (AVA) CEO’s spouse’s ownership reported in this Form 4?

The filing reports 695 AVISTA CORP common shares held indirectly through the CEO’s spouse. These are categorized as indirect ownership with the nature of ownership described as “Shares Held by Spouse,” separate from Heather Rosentrater’s directly held 78,132 common shares.

What do the M and F transaction codes signify in the AVISTA CORP (AVA) Form 4?

Code “M” represents exercise or conversion of a derivative security, and “F” represents tax‑withholding disposition. In this filing, “M” applies to the performance share conversion and “F” to the 671 shares withheld to cover income tax on the acquired performance shares.

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Accepted by SEC EDGAR 03/03/2026 - 07:01 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Rosentrater Heather Lynn

(Last) (First) (Middle)

1411 E. MISSION AVENUE

(Street)

SPOKANE WA 99202

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
AVISTA CORP [ AVA ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President & CEO

3. Date of Earliest Transaction (Month/Day/Year)
03/02/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock - Performance Shares (CEPS)	03/02/2026		M		2,752	A	(1)	78,803	D
Common Stock - Performance Shares (CEPS)	03/02/2026		F		671(2)	D	$39.92	78,132	D
Common Stock in Spouse's Plan								695	I	Shares Held by Spouse

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Conversion of 2023 Performance Shares (CEPS)	(1)	03/02/2026		M			6,879	(1)	(1)	Common Stock	6,879	(1)	0	D

Explanation of Responses:

1. No conversion price. Shares awarded if performance measure is met.

2. Shares withheld to pay income tax on Performance Shares acquired 3/2/26.

	/s/Heather L. Rosentrater	03/03/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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