Lam Research CLO sells 6,010 shares after option exercise

LAM RESEARCH CORP Chief Legal Officer Ava Harter reported an option exercise-and-sale transaction in company stock.

Rhea-AI Filing Summary

LAM RESEARCH CORP Chief Legal Officer Ava Harter reported an option exercise-and-sale transaction in company stock. On April 27, 2026, she exercised employee stock options to acquire 6,010 shares of common stock at $77.039 per share and then sold 6,010 shares in an open-market transaction at $258.66 per share.

After these transactions, Harter directly owned about 53,205.455 shares of Lam Research common stock. A footnote states that this amount includes shares subject to unvested restricted stock units.

Insider Trade Summary

Exercise and Sale: 6,010 shares ($1.09M approx. pre-tax spread)

Exercise and Sale 3 txns

Insider Harter Ava

Role Chief Legal Officer

Sold 6,010 shs ($1.55M)

Approx. gross sale proceeds $1.55M

Approx. exercise cost $463K

Approx. pre-tax spread $1.09M

Type	Security	Shares	Price	Value
Exercise	Employee Stock Option (Right to Buy)	6,010	$0.00	$0.00
Exercise	Common Stock	6,010	$77.039	$463K
Sale	Common Stock	6,010	$258.66	$1.55M

Holdings After Transaction: Employee Stock Option (Right to Buy) — 6,010 contracts (Direct); Common Stock — 53,205.455 shares (Direct)

Footnotes (2)

1. F1. The amount reported includes shares subject to unvested restricted stock units.
2. F2. The stock options will become exercisable in three equal installments on 03/01/2025, 03/01/2026, and 03/01/2027.

Key Figures

Shares sold: 6,010 shares Sale price: $258.66 per share Options exercised: 6,010 shares +3 more

6 metrics

Shares sold 6,010 shares Open-market sale of common stock on April 27, 2026

Sale price $258.66 per share Price for 6,010 common shares sold

Options exercised 6,010 shares Employee stock option exercise into common stock

Option exercise price $77.039 per share Conversion or exercise price for employee stock option

Shares owned after transactions 53,205.455 shares Direct Lam Research common stock holdings after Form 4 transactions

Option expiration August 5, 2031 Expiration date of the employee stock option reported

Key Terms

Employee Stock Option (Right to Buy), restricted stock units, derivative security, open-market sale, +1 more

5 terms

Employee Stock Option (Right to Buy) financial

"security_title: "Employee Stock Option (Right to Buy)""

restricted stock units financial

"The amount reported includes shares subject to unvested restricted stock units."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

derivative security financial

"transaction_code_description: "Exercise or conversion of derivative security""

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

open-market sale financial

"transaction_action: "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

exercise or conversion financial

"transaction_action: "derivative exercise/conversion""

FAQ

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

What insider transaction did Lam Research (LRCX) disclose for Ava Harter?

Lam Research disclosed that Chief Legal Officer Ava Harter exercised employee stock options for 6,010 common shares at $77.039 and sold 6,010 shares in an open-market transaction at $258.66 on April 27, 2026, according to a Form 4 insider trading report.

How many Lam Research (LRCX) shares does Ava Harter hold after this Form 4?

After the reported transactions, Ava Harter directly holds approximately 53,205.455 shares of Lam Research common stock. A footnote explains that this figure includes shares that are subject to unvested restricted stock units, meaning some of the reported holdings are still in the process of vesting.

At what prices did Ava Harter trade Lam Research (LRCX) shares in this filing?

In this Form 4, Ava Harter exercised options at $77.039 per share to acquire 6,010 Lam Research common shares and sold 6,010 shares in an open-market transaction at $258.66 per share. These figures highlight the difference between her option exercise price and the market sale price.

What type of employee stock option did Ava Harter exercise at Lam Research (LRCX)?

The filing shows Ava Harter exercised an "Employee Stock Option (Right to Buy)" covering 6,010 underlying Lam Research common shares at a conversion or exercise price of $77.039. The option had an expiration date of August 5, 2031, based on the reported derivative security details.

Does the Lam Research (LRCX) Form 4 mention unvested restricted stock units for Ava Harter?

Yes. A footnote to the Form 4 states that the amount of Lam Research common stock reported as owned by Ava Harter includes shares subject to unvested restricted stock units, indicating part of her disclosed stake consists of equity awards that continue to vest over time.

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

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Accepted by SEC EDGAR 04/28/2026 - 02:04 PM EDT 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^*

Harter Ava

(Last) (First) (Middle)

4650 CUSHING PKWY

(Street)

FREMONT CALIFORNIA 94538

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
LAM RESEARCH CORP [ LRCX ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Legal Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/27/2026

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	04/27/2026		M		6,010	A	$77.039	59,215.455(1)	D
Common Stock	04/27/2026		S		6,010	D	$258.66	53,205.455(1)	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
Employee Stock Option (Right to Buy)	$77.039	04/27/2026		M			6,010	(2)	08/05/2031	Common Stock	6,010	$0	6,010	D

Explanation of Responses:

1. The amount reported includes shares subject to unvested restricted stock units.

2. The stock options will become exercisable in three equal installments on 03/01/2025, 03/01/2026, and 03/01/2027.

Remarks:

	Marta Woods by Power of Attorney	04/27/2026
	** 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)