X0306 4/A 2015-02-19 2015-02-23 0 0000707549 LAM RESEARCH CORP LRCX 0001469469 Bettinger Douglas R 4650 CUSHING PARKWAY FREMONT CA 94538 0 1 0 0 EVP, Chief Financial Officer Common Stock 2015-02-19 4 S 0 1540 81.67 D 41225 D Common Stock 2015-02-19 4 M 0 3974 51.76 A 45199 D Common Stock 2015-02-19 4 S 0 3974 81.67 D 41225 D Common Stock 2015-02-19 4 M 0 855 51.76 A 42080 D Common Stock 2015-02-19 4 M 0 8205 42.41 A 50285 D Common Stock 2015-02-20 4 S 0 427 82.92 D 49858 D Common Stock 2015-02-20 4 S 0 4102 82.92 D 45756 D Employee Stock Option (Right to Buy) 51.76 2015-02-19 4 M 0 3974 0 A 2021-02-18 Common Stock 3974 35263 D Employee Stock Option (Right to Buy) 51.76 2015-02-19 4 M 0 855 0 A 2021-02-18 Common Stock 855 34408 D Employee Stock Option (Right to Buy) 42.41 2015-02-19 4 M 0 8205 0 A 2015-02-08 2020-03-11 Common Stock 8205 26203 D Amount reported includes shares subject to unvested Restricted Stock Units. This Form 4/A is being filed solely to correct clerical errors in the entries in Column 5 of Table I of Mr. Bettinger's Form 4 filed on February 23, 2015. Shares sold pursuant to 10b5-1 Trading Plan. 33.3% of the stock options will vest on 2/18/15, 2/18/16, and 2/18/17. Aaron Beckman by Power of Attorney 2015-07-28