LRCX insider trades: option exercise 6,010; sales at $157.46–$157.48

Rhea-AI Filing Summary

Lam Research (LRCX) reported insider transactions by its Chief Legal Officer. On 10/27/2025, the officer sold 3,000 shares of common stock at $157.48, exercised employee stock options for 6,010 shares at an exercise price of $77.039, and sold 6,010 shares at $157.46.

Following these transactions, the officer beneficially owned 56,786.455 shares directly, which includes shares subject to unvested restricted stock units. The filing shows 12,020 derivative securities (employee stock options) remaining, expiring on 08/05/2031. The options referenced became exercisable in three equal installments on 03/01/2025, 03/01/2026, and 03/01/2027.

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

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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^*

Harter Ava

(Last) (First) (Middle)

4650 CUSHING PKWY

(Street)

FREMONT CA 94538

(City) (State) (Zip)

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

3. Date of Earliest Transaction (Month/Day/Year)
10/27/2025

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	10/27/2025		S		3,000	D	$157.48	56,786.455(1)	D
Common Stock	10/27/2025		M		6,010	A	$77.039	62,796.455(1)	D
Common Stock	10/27/2025		S		6,010	D	$157.46	56,786.455(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	10/27/2025		M			6,010	(2)	08/05/2031	Common Stock	6,010	$0	12,020	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	10/28/2025
	** 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).
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FAQ

What insider transactions did LRCX report on 10/27/2025?

The Chief Legal Officer sold 3,000 shares at $157.48, exercised options for 6,010 shares at $77.039, and sold 6,010 shares at $157.46.

How many LRCX shares does the reporting officer hold after the transactions?

Beneficial ownership is 56,786.455 shares directly, including shares subject to unvested RSUs.

What options remain for the LRCX officer after these trades?

The filing lists 12,020 employee stock options remaining, expiring on 08/05/2031.

When did the exercised LRCX options vest?

They became exercisable in three equal installments on 03/01/2025, 03/01/2026, and 03/01/2027.

What is the exercise price for the LRCX options exercised?

The exercise price reported is $77.039 per share.

Was the LRCX trading under a Rule 10b5-1 plan?

The excerpt includes the 10b5-1 checkbox language; a selection is not indicated in the provided text.