0001593968-22-000184 4 1 20220107 20220110 20220110 CHUKWU EMEKA 0001381846 4 34 001-06395 22522236 200 FLYNN ROAD CAMARILLO CA 93012-8790 SEMTECH CORP 0000088941 3674 952119684 DE 0130 200 FLYNN ROAD CAMARILLO CA 93012-8790 8054982111 200 FLYNN ROAD CAMARILLO CA 93012-8790 4 1 primary_01.xml PRIMARY DOCUMENT X0306 4 2022-01-07 0000088941 SEMTECH CORP SMTC 0001381846 CHUKWU EMEKA 200 FLYNN ROAD CAMARILLO CA 93012-8790 false true false false EVP and CFO Common Stock 2022-01-07 4 M false 3750 17.51 A 103439 D Common Stock 2022-01-07 4 S false 1800 80.7558 D 101639 D Common Stock 2022-01-07 4 S false 1151 81.9102 D 100488 D Common Stock 2022-01-07 4 S false 303 83.3372 D 100185 D Common Stock 2022-01-07 4 S false 311 84.8921 D 99874 D Common Stock 2022-01-07 4 S false 185 85.669 D 99689 D Stock Option (right to buy) 17.51 2022-01-07 4 M false 3750 0 D 2017-02-23 2022-02-23 Common Stock 3750 11250 D This price represents the weighted average of these sales. The prices ranged from $80.47 to $80.985. Price and share details are available upon request. This price represents the weighted average of these sales. The prices ranged from $81.54 to $82.4975. Price and share details are available upon request. This price represents the weighted average of these sales. The prices ranged from $82.715 to $83.66. Price and share details are available upon request. This price represents the weighted average of these sales. The prices ranged from $84.425 to $85.25. Price and share details are available upon request. This price represents the weighted average of these sales. The prices ranged from $85.52 to $85.78. Price and share details are available upon request. These transactions are pursuant to a Rule 10b5-1 trading plan adopted by Mr. Chukwu on September 13, 2021. /s/Emeka Chukwu by Charles B. Ammann under Power of Attorney dated February 25, 2014 (Copy On File) 2022-01-10