[Form 4] LAM RESEARCH CORP Insider Trading Activity

Rhea-AI Filing Summary

Lam Research (LRCX) director reported insider transactions. On 11/07/2025, the reporting person acquired 1,635 shares at $0 and sold 30 shares at $159.52 pursuant to a Rule 10b5-1 trading plan adopted on November 12, 2024. On 11/10/2025, 1,622 shares were transferred as a gift to the Mayer Family Trust for no consideration.

Following these transactions, the reporting person held 1,635 shares directly and 30,552 shares indirectly via the trust. The filing notes that the person is trustee and the trust’s beneficiaries are the reporting person and immediate family, and that the reporting person remains the beneficial owner of the trust-held securities.

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^*

Mayer Bethany

(Last) (First) (Middle)

C/O LAM RESEARCH CORPORATION

4650 CUSHING PARKWAY

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
11/07/2025

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	11/07/2025		A		1,635	A	$0	3,287(1)	D
Common Stock	11/07/2025		S		30(2)	D	$159.52	3,257(1)	D
Common Stock	11/10/2025		G		1,622	D	$0	1,635(1)	D(3)
Common Stock	11/10/2025		G		1,622	A	$0	30,552	I(3)	By Trust

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

2. This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 12, 2024

3. On November 10, 2025, the reporting person transferred 1,622 shares of LRCX common stock to the Mayer Family Trust for no consideration. The reporting person is trustee of the trust, and the reporting person and members of her immediate family are the sole beneficiaries of the trust. The reporting person remains the beneficial owner of the securities held by the trust.

Remarks:

	Marta Woods by Power of Attorney	11/10/2025
	** 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).
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.

FAQ

What did LRCX’s director report on Form 4?

Multiple transactions: acquisition of 1,635 shares at $0 on 11/07/2025, sale of 30 shares at $159.52 on 11/07/2025, and a gift of 1,622 shares on 11/10/2025.

Was the LRCX share sale under a 10b5-1 plan?

Yes. The 30-share sale at $159.52 on 11/07/2025 was effected under a Rule 10b5-1 trading plan adopted on November 12, 2024.

How many LRCX shares were gifted and to whom?

1,622 shares were transferred on 11/10/2025 to the Mayer Family Trust for no consideration.

What are the director’s LRCX holdings after the transactions?

1,635 shares directly and 30,552 shares indirectly via the Mayer Family Trust.

Who benefits from the Mayer Family Trust noted in the filing?

The reporting person is trustee, and the reporting person and immediate family are the sole beneficiaries; the reporting person remains the beneficial owner.

Which transaction codes were used in the filing?

A (acquisition at $0), S (sale at $159.52), and G (gift/transfer for no consideration).