SEC FORM 3

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SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Rammohan Karthikeyan

(Last)

(First)

(Middle)

C/O LAM RESEARCH CORPORATION

4650 CUSHING PKWY

(Street)

FREMONT

94538

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
03/06/2026

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

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

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	SVP, Global Ops & Ent Solns

5. 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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	16,600⁽¹⁾	D
Common Stock	79,856	I	By Trust
Common Stock	2,578.029	I	By 401K

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
Market-based Performance Restricted Stock Unit	⁽²⁾	⁽²⁾	Common Stock	4,609	$0	D
Market-based Performance Restricted Stock Unit	⁽³⁾	⁽³⁾	Common Stock	6,840	$0	D
Market-based Performance Restricted Stock Unit	⁽⁴⁾	⁽⁴⁾	Common Stock	8,328	$0	D

Explanation of Responses:

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

2. The Market-based performance restricted stock units will vest between 0% and 150% on 2/28/2028. The performance of this award is based on the percentile ranking of Lam Research's Total Shareholder Return relative to the Total Shareholder Return of the companies in the PHLX Semiconductor Total Return Index during the performance period of 02/03/2025 through 02/02/2028.

3. The Market-based performance restricted stock units will vest between 0% and 150% on 03/01/2027. The performance of this award is based on the Lam Research Total Shareholder Return performance relative to the PHLX Semiconductor Total Return Index Total Shareholder Return during the performance period of 02/01/2024 through 01/31/2027.

4. The Market-based performance restricted stock units will vest between 0% and 150% on 2/27/2029. The performance of this award is based on the percentile ranking of Lam Research's Total Shareholder Return relative to the Total Shareholder Return of the companies in the PHLX Semiconductor Total Return Index during the performance period of 02/2/2026 through 02/01/2029.

Remarks:

	Marta Woods by Power of Attorney	03/10/2026
	** 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 5 (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.