KLA CEO sells 72,019 shares at $171.88 per share

KLA’s CEO Richard P. Wallace sold 72,019 KLAC shares under a pre-arranged Rule 10b5-1 trading plan and continues to hold over 700,000 shares including a substantial RSU component.

Rhea-AI Filing Summary

KLA CORP (KLAC) reported that President and CEO Richard P. Wallace sold 72,019 shares of common stock on September 15, 2026, in a sale classified as an open market or private transaction at $171.88 per share. The transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on November 19, 2025. Following this sale, Wallace directly holds 706,924.5499 shares of KLA common stock, which includes 386,970.215 shares issuable upon vesting of restricted stock units (RSUs).

Insider Trade Summary 10b5-1

Net Seller: 72,019 shares

Net Sell 1 txn

Insider WALLACE RICHARD P

Role President and CEO

Sold 72,019 shs ($12.38M)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2	72,019	$171.88	$12.38M

Holdings After Transaction: Common Stock — 706,924.5499 shares (Direct)

Footnotes (2)

1. F1. This sale was effected pursuant to the terms of a Rule 10b5-1 trading plan adopted by the Reporting Person on November 19, 2025.
2. F2. The number of shares of KLA common stock includes 386,970.215 shares issuable upon vesting of restricted stock units ("RSUs").

Key Figures

Shares sold: 72,019 shares Sale price per share: $171.88 per share Shares held after transaction: 706,924.5499 shares +2 more

5 metrics

Shares sold 72,019 shares Common stock sale by CEO on September 15, 2026

Sale price per share $171.88 per share Price for the 72,019 KLAC shares sold

Shares held after transaction 706,924.5499 shares Direct KLA common stock holdings by CEO after sale

RSU-based shares included in holdings 386,970.215 shares Shares issuable upon vesting of RSUs included in post-transaction holdings

Rule 10b5-1 plan adoption date November 19, 2025 Plan under which the September 15, 2026 sale was effected

Key Terms

Rule 10b5-1 trading plan, restricted stock units ("RSUs"), open market or private transaction

3 terms

Rule 10b5-1 trading plan regulatory

"This sale was effected pursuant to the terms of a Rule 10b5-1 trading plan"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

restricted stock units ("RSUs") financial

"includes 386,970.215 shares issuable upon vesting of restricted stock units ("RSUs")"

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

open market or private transaction financial

"Sale in open market or private transaction"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did KLAC report for CEO Richard P. Wallace?

KLA CORP reported that CEO Richard P. Wallace sold 72,019 shares of KLA common stock on September 15, 2026, in a sale classified as an open market or private transaction at $171.88 per share.

How many KLAC shares does the CEO hold after this reported sale?

After the reported sale, Richard P. Wallace directly holds 706,924.5499 shares of KLA common stock, according to the disclosure.

Was the KLAC CEO’s September 15, 2026 sale made under a Rule 10b5-1 plan?

Yes. The filing states the sale was effected pursuant to a Rule 10b5-1 trading plan adopted by Richard P. Wallace on November 19, 2025.

What portion of the KLAC CEO’s post-transaction holdings are RSUs?

The filing notes that post-transaction holdings include 386,970.215 shares of KLA common stock issuable upon vesting of restricted stock units (RSUs).

What was the per-share price for the KLAC CEO’s sale on September 15, 2026?

The reported per-share price for the CEO’s September 15, 2026 sale was $171.88 per share of KLA common stock.

How many KLAC shares in total did the CEO sell in this Form 4 filing?

This Form 4 reports that Richard P. Wallace sold a total of 72,019 shares of KLA common stock in the disclosed transaction.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/16/2026 - 04:06 PM Accepted by SEC EDGAR 09/16/2026 - 04:05 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).

X

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^*

WALLACE RICHARD P

(Last) (First) (Middle)

ONE TECHNOLOGY DRIVE

(Street)

MILPITAS CALIFORNIA 95035

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
KLA CORP [ KLAC ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/15/2026

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

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

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

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	09/15/2026		S		72,019(1)	D	$171.88	706,924.5499(2)	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

Explanation of Responses:

1. This sale was effected pursuant to the terms of a Rule 10b5-1 trading plan adopted by the Reporting Person on November 19, 2025.

2. The number of shares of KLA common stock includes 386,970.215 shares issuable upon vesting of restricted stock units ("RSUs").

	/s/ Jeffrey S. Cannon, as attorney-in-fact for Richard P. Wallace	09/16/2026
	** 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.
* Form 4: SEC 1474 (03-26)