What is Jason R. Thackston’s AVISTA CORP share ownership after these Form 4 transactions?

Following the March 2, 2026 transactions, Jason R. Thackston directly owns 58,788 shares of Avista Corp common stock. This reflects the net result after receiving 2,052 shares from performance share conversion and having 500 shares withheld to satisfy related income tax obligations.

Avista Corp (NYSE: AVA) SVP converts 2023 performance shares, withholds 500 shares for tax

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

Avista Corp senior vice president Jason R. Thackston exercised 2023 performance share awards and had shares withheld for taxes. He acquired 2,052 shares of common stock through conversion of performance shares and 5,128 related derivative shares, while 500 shares were disposed of to cover income tax, leaving 58,788 shares directly owned.

Insider Trade Summary

5,128 shares exercised/converted

Mixed 3 txns

Insider Thackston Jason R

Role Senior Vice President

Type	Security	Shares	Price	Value
Exercise	Conversion of 2023 Performance Shares (CEPS)	5,128	$0.00	--
Exercise	Common Stock - Performance Shares (CEPS)	2,052	$0.00	--
Tax Withholding	Common Stock - Performance Shares (CEPS)	500	$39.92	$20K

Holdings After Transaction: Conversion of 2023 Performance Shares (CEPS) — 0 shares (Direct); Common Stock - Performance Shares (CEPS) — 59,288 shares (Direct)

Footnotes (1)

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

Form 4 Insider Transactions: What Each Field Means →

03/03/2026 - 07:04 PM

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^*

Thackston Jason R

(Last)

(First)

(Middle)

1411 E MISSION AVENUE

(Street)

SPOKANE

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)

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock - Performance Shares (CEPS)	03/02/2026		M		2,052	A	⁽¹⁾	59,288	D
Common Stock - Performance Shares (CEPS)	03/02/2026		F		500⁽²⁾	D	$39.92	58,788	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
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.

	/s/Jason R. Thackston	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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

Source: View Original Filing on SEC EDGAR

FAQ

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

AVISTA CORP reported that Senior Vice President Jason R. Thackston exercised 2023 performance share awards, acquiring 2,052 shares of common stock and related derivative shares, while 500 shares were withheld to cover income tax, resulting in direct ownership of 58,788 common shares after the transactions.

How many AVA performance shares did Jason R. Thackston convert on March 2, 2026?

On March 2, 2026, Jason R. Thackston converted 5,128 2023 performance shares with no cash conversion price and received 2,052 shares of Avista Corp common stock. These shares were awarded because specified performance measures were met, according to the accompanying transaction footnotes.

Why were 500 AVISTA CORP shares disposed of in Jason R. Thackston’s Form 4 filing?

The filing shows 500 Avista Corp common shares were disposed of under code F at $39.92 per share. Footnotes explain these shares were withheld to pay income tax obligations arising from the performance shares acquired on March 2, 2026, rather than an open-market sale.

How are AVISTA CORP 2023 performance shares structured for Jason R. Thackston?

The 2023 performance shares for Jason R. Thackston have no stated conversion price, according to the footnotes. Instead, shares of Avista Corp common stock are awarded if specified performance measures are met, leading to the March 2, 2026 conversion and share issuance described in the Form 4.