Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 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 that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN 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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(Print or Type Responses)

1. Name and Address of Reporting Person * BRANDT ERIC 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) (Last) (First) (Middle) C/O LAM RESEARCH CORPORATION, 4650 CUSHING PARKWAY 3. Date of Earliest Transaction (Month/Day/Year) 06/11/2026 (Street) FREMONT, CA 94538 4. If Amendment, Date 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 (City) (State) (Zip) 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 06/11/2026 S 974(1) D $337.56(2) 252,731(3) D Common Stock 06/11/2026 S 1,083(1) D $338.62(4) 251,648(3) D Common Stock 06/11/2026 S 1,895(1) D $339.75(5) 249,753(3) D Common Stock 06/11/2026 S 1,277(1) D $340.68(6) 248,476(3) D Common Stock 06/11/2026 S 1,070(1) D $341.81(7) 247,406(3) D Common Stock 06/11/2026 S 3,644(1) D $342.91(8) 243,762(3) D Common Stock 06/11/2026 S 1,481(1) D $343.96(9) 242,281(3) D Common Stock 06/11/2026 S 3,208(1) D $344.92(10) 239,073(3) D Common Stock 06/11/2026 S 2,832(1) D $345.84(11) 236,241(3) D Common Stock 06/11/2026 S 3,442(1) D $346.79(12) 232,799(3) D Common Stock 06/11/2026 S 6,592(1) D $347.86(13) 226,207(3) D Common Stock 06/11/2026 S 4,334(1) D $348.73(14) 221,873(3) D Common Stock 06/11/2026 S 1,517(1) D $349.79(15) 220,356(3) D Common Stock 06/11/2026 S 36(1) D $350.77 220,320(3) D Common Stock 06/11/2026 S 1,172(1) D $353.52(16) 219,148(3) D Common Stock 06/11/2026 S 1,461(1) D $354.08(17) 217,687(3) D Common Stock 06/11/2026 S 1,331(1) D $355.5(18) 216,356(3) D Common Stock 06/11/2026 S 1,653(1) D $356.27(19) 214,703(3) D Common Stock 06/11/2026 S 1,455(1) D $357.06(20) 213,248(3) D Common Stock 06/11/2026 S 1,880(1) D $358.22(21) 211,368(3) D Common Stock 06/11/2026 S 780(1) D $359.24(22) 210,588(3) D Common Stock 06/11/2026 S 664(1) D $360.24(23) 209,924(3) D Common Stock 06/11/2026 S 1,756(1) D $361.05(24) 208,168(3) D Common Stock 06/11/2026 S 2,604(1) D $362.2(25) 205,564(3) D Common Stock 06/11/2026 S 5,717(1) D $362.95(26) 199,847(3) D Common Stock 06/11/2026 S 642(1) D $364(27) 199,205(3) D

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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 Underlying Securities (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 of Derivative Security: 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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
BRANDT ERIC C/O LAM RESEARCH CORPORATION 4650 CUSHING PARKWAY FREMONT, CA 94538	X

Signatures

Marta Woods by Power of Attorney		06/15/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 6, 2026.
(2)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $337.00 to $337.97, inclusive
(3)	The amount reported includes shares subject to unvested restricted stock units.
(4)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $338.19 to $339.15, inclusive
(5)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $339.23 to $340.20, inclusive
(6)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $340.278 to $341.249, inclusive
(7)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $341.418 to $342.202, inclusive
(8)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $342.415 to $343.39, inclusive
(9)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $343.40 to $344.377, inclusive
(10)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $344.396 to $345.348, inclusive
(11)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $345.386 to $346.336, inclusive
(12)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $346.383 to $347.359, inclusive
(13)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $347.383 to $348.355, inclusive
(14)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $348.391 to $349.351, inclusive
(15)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $349.409 to $350.260, inclusive
(16)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $352.824 to $353.805, inclusive
(17)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $353.818 to $354.743, inclusive
(18)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $354.805 to $355.746, inclusive
(19)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $355.75 to $356.709, inclusive
(20)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $356.759 to $357.703, inclusive
(21)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $357.762 to $358.70, inclusive
(22)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $358.79 to $359.735, inclusive
(23)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $359.819 to $360.59, inclusive
(24)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $360.60 to $361.54, inclusive
(25)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $361.595 to $362.550, inclusive
(26)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $362.58 to $363.57, inclusive
(27)	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $363.765 to $364.37, inclusive

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