FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

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, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * Bettinger Douglas R   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 Financial Officer & EVP (Last) (First) (Middle) 4650 CUSHING PARKWAY 3. Date of Earliest Transaction (Month/Day/Year) 03/01/2019 (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 03/01/2019   F   10,405 D $ 176.75 121,874 (1) D   Common Stock 03/01/2019   F   1,972 D $ 176.75 119,902 (1) D   Common Stock 03/01/2019   F   1,569 D $ 176.75 118,333 (1) D   Common Stock 03/01/2019   F   782 D $ 176.75 117,551 (1) D   Common Stock 03/01/2019   A   4,779 (2) A $ 0 122,330 (1) 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

Market-based Performance Restricted Stock Unit

$ 0

03/01/2019

A

7,966

(3)

(3)

Common Stock

7,966

$ 0

7,966

D

Employee Stock Option (Right to Buy)

$ 176.75

03/01/2019

A

12,744

(4)

03/01/2026

Common Stock

12,744

$ 176.75

12,744

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Bettinger Douglas R 4650 CUSHING PARKWAY FREMONT, CA 94538			Chief Financial Officer & EVP

Signatures

Leign Cramer by Power of Attorney		03/05/2019
**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)	Amount reported includes shares subject to unvested Restricted Stock Units.
(2)	The Restricted Stock Units will vest in three equal installments on 03/01/2020, 03/01/2021, and 03/01/2022.
(3)	These Market-based Performance Restricted Stock Units vest between 0% and 150% on 03/01/2022. The performance of this award is based on the Lam Research Total Shareholder Return performance relative to the Philadelphia Semiconductor Sector Index Total Shareholder Return during the performance period of 02/01/2019 through 01/31/2022.
(4)	The stock option becomes exercisable in three equal installments on 03/01/2020, 03/01/2021, and 03/01/2022.

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