X0306 4 2021-12-20 0001102934 CMC Materials, Inc. CCMP 0001789945 Mumford Colleen Elizabeth C/O CMC MATERIALS, INC. 870 N COMMONS DRIVE AURORA IL 60504 1 VP, Marketing & Communications Common Stock 2021-12-20 4 M 0 363 46.45 A 3173 D Common Stock 2021-12-20 4 S 0 363 184.6292 D 2810 D Common Stock 2021-12-20 4 M 0 1324 42.37 A 4134 D Common Stock 2021-12-20 4 S 0 1324 184.6292 D 2810 D Common Stock 2021-12-20 4 M 0 2740 60.27 A 5550 D Common Stock 2021-12-20 4 S 0 2740 184.6292 D 2810 D Common Stock 2021-12-20 4 M 0 774 92.57 A 3584 D Common Stock 2021-12-20 4 S 0 774 184.6292 D 2810 D Common Stock 2021-12-20 4 M 0 624 101.73 A 3434 D Common Stock 2021-12-20 4 S 0 624 184.6292 D 2810 D Common Stock 2021-12-20 4 M 0 596 127.48 A 3406 D Common Stock 2021-12-20 4 S 0 596 184.6292 D 2810 D Common Stock 2021-12-20 4 M 0 521 145.58 A 3331 D Common Stock 2021-12-20 4 S 0 521 184.6292 D 2810 D Stock Options (Right to Buy) 46.45 2021-12-20 4 M 0 363 0 D 2015-12-03 2024-12-03 Common Stock 363 0 D Stock Options (Right to Buy) 42.37 2021-12-20 4 M 0 1324 0 D 2016-12-03 2025-12-03 Common Stock 1324 0 D Stock Options (Right to Buy) 60.27 2021-12-20 4 M 0 2740 0 D 2017-12-05 2026-12-05 Common Stock 2740 0 D Stock Options (Right to Buy) 92.57 2021-12-20 4 M 0 774 0 D 2018-12-05 2027-12-05 Common Stock 774 0 D Stock Options (Right to Buy) 101.73 2021-12-20 4 M 0 624 0 D 2019-12-06 2028-12-06 Common Stock 624 208 D Stock Options (Right to Buy) 127.48 2021-12-20 4 M 0 596 0 D 2020-12-05 2029-12-05 Common Stock 596 596 D Stock Options (Right to Buy) 145.58 2021-12-20 4 M 0 521 0 D 2021-12-03 2030-12-03 Common Stock 521 1566 D Sale to cover exercise price of, and taxes related to, cashless exercise of stock options. 2014 (FY15) Non-Qualified Stock Option Grant Vesting Schedule: 25% 12/03/2015, 25% 12/03/2016, 25% 12/03/2017, 25% 12/03/2018. 2015 (FY16) Non-Qualified Stock Option Grant Vesting Schedule: 25% 12/03/2016, 25% 12/03/2017, 25% 12/03/2018, 25% 12/03/2019. 2016 (FY17) Non-Qualified Stock Option Grant Vesting Schedule: 25% 12/05/2017, 25% 12/05/2018, 25% 12/05/2019, 25% 12/05/2020. 2017 (FY18) Non-Qualified Stock Option Grant Vesting Schedule: 25% 12/05/2018, 25% 12/05/2019, 25% 12/05/2020, 25% 12/05/2021. 2018 (FY19) Non-Qualified Stock Option Grant Vesting Schedule: 25% 12/06/2019, 25% 12/06/2020, 25% 12/06/2021, 25% 12/06/2022. 2019 (FY20) Non-Qualified Stock Option Grant Vesting Schedule: 25% 12/05/2020, 25% 12/05/2021, 25% 12/05/2022, 25% 12/05/2023. 2020 (FY21) Non-Qualified Stock Option Grant Vesting Schedule: 25% 12/03/2021, 25% 12/03/2022, 25% 12/03/2023, 25% 12/03/2024. /s/ H. Carol Bernstein (Power of Attorney) 2021-12-20