Avista (NYSE: AVA) SVP reports performance share conversion and tax withholding

Rhea-AI Filing Summary

AVISTA CORP senior vice president Jason R. Thackston reported equity award activity tied to 2023 performance shares. On March 2, 2026, 5,128 performance share units were converted, resulting in an acquisition of 2,052 common shares. A separate transaction withheld 500 shares at $39.92 per share to cover income taxes on the performance shares, leaving Thackston with 44,788 common shares held directly.

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

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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^*

Thackston Jason R

(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)
	Senior Vice President

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

4. If Amendment, Date of Original Filed (Month/Day/Year)
03/03/2026

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		2,052	A	(1)	45,288(3)	D
Common Stock - Performance Shares (CEPS)	03/02/2026		F		500(2)	D	$39.92	44,788(3)	D

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			5,128	(1)	(1)	Common Stock	5,128	(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.

3. Correcting the total amount of shares after the transaction - had incorrectly added the wrong amount to the total.

	/s/Jason R. Thackston	03/04/2026
	** Signature of Reporting Person	Date
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FAQ

What insider transactions did AVISTA CORP (AVA) report for Jason R. Thackston?

AVISTA CORP reported that Senior Vice President Jason R. Thackston had 5,128 2023 performance share units convert on March 2, 2026, generating 2,052 common shares and a separate 500-share tax-withholding disposition, leaving him with 44,788 common shares held directly.

How many AVISTA CORP (AVA) shares did Jason R. Thackston acquire in the latest Form 4/A?

Jason R. Thackston acquired 2,052 shares of AVISTA CORP common stock when 2023 performance share units converted on March 2, 2026. These shares resulted from an exercise or conversion of derivative securities with no stated conversion price under the company’s performance share program.

Why were 500 AVISTA CORP (AVA) shares disposed of in Jason R. Thackston’s Form 4/A?

The filing shows a 500-share disposition coded as “F,” meaning shares were withheld at $39.92 each to pay income tax on performance shares acquired March 2, 2026. This tax-withholding transaction reduced his direct common stock holdings from 45,288 to 44,788 shares.

What is Jason R. Thackston’s AVISTA CORP (AVA) share ownership after these transactions?

After the March 2, 2026 transactions, Jason R. Thackston directly holds 44,788 AVISTA CORP common shares. This total reflects both the 2,052 shares received from performance share conversion and the 500 shares withheld to satisfy income tax obligations on those performance shares.

What does the Form 4/A footnote reveal about AVISTA CORP (AVA) performance shares?

A footnote explains that 2023 performance shares had no conversion price and shares were awarded only if a performance measure was met. Another footnote clarifies that 500 shares were withheld on March 2, 2026 to pay income taxes on the performance shares acquired that day.

Why was AVISTA CORP (AVA) Form 4 later amended for Jason R. Thackston?

One footnote states the amendment corrects the total number of shares after the transactions, indicating a prior filing had added the wrong amount to the total. The corrected Form 4/A now reports 44,788 AVISTA CORP common shares directly owned by Jason R. Thackston.