[Form 4] Lam Research Corp Insider Trading Activity

Rhea-AI Filing Summary

Lam Research (LRCX) Form 4: Chief Legal Officer Ava Harter reported two 2025 transactions in common stock.

• 08 Apr 2025 (Code P): Acquired 9.455 shares at $63.66 via the company’s dividend reinvestment program, lifting direct holdings to 65,056.455 shares.
• 05 Aug 2025 (Code F): 5,270 shares automatically withheld at $96.68 to cover tax on restricted-stock-unit vesting, reducing direct ownership to 59,786.455 shares.

No derivative securities were involved and no Rule 10b5-1 plan was indicated. The reporting person continues to hold roughly 60 k shares, signalling ongoing alignment, while the disposition appears administrative rather than a discretionary sale.

Insights

Securities Analyst

TL;DR9Routine tax withholding; immaterial for valuation, neutral insider signal.

The only significant line item is a Code F tax-withholding disposal worth about $0.51 million—minor relative to Lam Research’s multibillion-dollar market cap. Code F denotes shares surrendered to the company, not an open-market sale, so bearish interpretation is unwarranted. The subsequent holding of nearly 60 k shares (~$6 m at the disposal price) indicates the executive maintains a substantial stake. No derivatives, no new options, and no pattern of selling emerge. From a governance and sentiment perspective, the filing is neutral and not impactful for investment thesis.

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 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)
08/05/2025

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	04/08/2025		P	V	9.455(1)	A	$63.66	65,056.455(2)	D
Common Stock	08/05/2025		F		5,270(3)	D	$96.68	59,786.455(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. At the election of the reporting person, the shares were acquired pursuant to a dividend reinvestment program.

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

3. Represents shares that were automatically withheld upon vesting of restricted stock units to satisfy tax withholding obligations.

Remarks:

	Marta Woods by Power of Attorney	08/06/2025
	** 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

How many LRCX shares did the insider dispose of on 5 Aug 2025?

5,270 shares were withheld to cover taxes at $96.68 each.

Was the August 2025 transaction an open-market sale?

No. Code F indicates shares were withheld by the issuer solely for tax withholding purposes.

What is the insider’s current direct ownership in Lam Research?

After the reported transactions, Ava Harter directly holds 59,786.455 LRCX shares.

Did the filing report any derivative securities activity?

No derivative securities were acquired or disposed of in this Form 4.

Does the filing reference a Rule 10b5-1 trading plan?

The form does not indicate that the transactions were executed under a Rule 10b5-1 plan.