144 0001519910 XXXXXXXX LIVE 0001104657 MATERION Corp 001-15885 6070 PARKLAND BLVD. MAYFIELD HTS. OH 44124 2163834931 Chemnitz Gregory R. Officer Common Fidelity Brokerage Services LLC

900 Salem Street Smithfield RI 02917

4000 628360.00 20736213 02/17/2026 NYSE Common 03/01/2025 Restricted Stock Vesting Issuer N 433 03/01/2025 Compensation Common 03/08/2019 SAR Issuer N 1425 03/08/2019 Compensation Common 02/24/2020 SAR Issuer N 2142 02/24/2020 Compensation Y 02/17/2026 /s/ Gerardo Ibarra-Munoz, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Gregory R. Chemnitz