X0508 4 2026-02-18 0 0001104657 MATERION Corp MTRN 0001541300 Vijayvargiya Jugal K. 6070 PARKLAND BLVD. MAYFIELD HEIGHTS OH 44124 1 1 0 0 President and CEO 0 Common Stock 2026-02-18 4 S 0 5952 156.221 D 124301 D Common Stock 2026-02-18 4 S 0 4056 157.031 D 120245 D Common Stock 2026-02-18 4 S 0 2200 158.262 D 118045 D Common Stock 2026-02-18 4 S 0 37 159.03 D 118008 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $155.680 to $156.660, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1), (3) and (4) of this Form 4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $156.725 to $157.520, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $158.000 to $158.660, inclusive. /s/Michelle R. Mekinda, as Attorney-In-Fact 2026-02-20