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, 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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(Print or Type Responses)

1. Name and Address of Reporting Person *   JENNINGS KEVIN 2. Date of Event Requiring Statement (Month/Day/Year) 05/16/2018 3. Issuer Name and Ticker or Trading Symbol LAM RESEARCH CORP [LRCX] (Last) (First) (Middle) C/O LAM RESEARCH CORPORATION, 4560 CUSHING PARKWAY 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Senior Vice President 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) FREMONT, CA 94538 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 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 9,026 (1) D Â

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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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 of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Market-based Performance Restricted Stock Unit	  (2)	  (2)	Common Stock	7,233	$ 0	D	Â
Market-based Performance Restricted Stock Unit	  (3)	  (3)	Common Stock	5,828	$ 0	D	Â
Market-based Performance Restricted Stock Unit	  (4)	  (4)	Common Stock	4,211	$ 0	D	Â
Employee Stock Option (Right to Buy)	  (5)	03/01/2024	Common Stock	4,660	$ 119.67	D	Â
Employee Stock Option (Right to Buy)	  (6)	03/01/2025	Common Stock	3,368	$ 190.07	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
JENNINGS KEVIN C/O LAM RESEARCH CORPORATION 4560 CUSHING PARKWAY FREMONT, CA 94538	Â	Â	  Senior Vice President	Â

Signatures

Leign Cramer by Power of Attorney		05/25/2018
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	Amount reported includes shares subject to unvested Restricted Stock Units.
(2)	These Market-based Performance Restricted Stock Units vest between 0% and 150% on 3/1/19. 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 2/1/16 through 1/31/19.
(3)	These Market-based Performance Restricted Stock Units vest between 0% and 150% on 3/1/20. 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 2/1/17 through 1/31/20.
(4)	These Market-based Performance Restricted Stock Units vest between 0% and 150% on 3/1/21. 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 2/1/18 through 1/31/21.
(5)	These stock options become exercisable in three equal installments on 3/1/18, 3/1/19, and 3/1/20.
(6)	These stock options become exercisable in three equal installments on 3/1/19, 3/1/20, and 3/1/21.

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