X0508 4 2026-02-17 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 2026-02-17 4 M 0 32122 58.30 A 162375 D Common Stock 2026-02-17 4 F 0 19159 151.785 D 143216 D Common Stock 2026-02-17 4 S 0 1575 146.653 D 141641 D Common Stock 2026-02-17 4 S 0 2740 147.423 D 138901 D Common Stock 2026-02-17 4 S 0 5254 148.392 D 133647 D Common Stock 2026-02-17 4 S 0 883 149.593 D 132764 D Common Stock 2026-02-17 4 S 0 1200 150.14 D 131564 D Common Stock 2026-02-17 4 S 0 1311 151.715 D 130253 D Stock Appreciation Rights 58.30 2026-02-17 4 M 0 32122 0 D 2026-02-22 Common Stock 32122 0 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $145.990 to $146.975, 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), (4), (5), (6), and (7) 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 $147.040 to $147.950, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $148.065 to $148.875, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $149.235 to $149.740, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $150.025 to $150.465, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $151.455 to $151.840, inclusive. The Stock Appreciation Rights vested in three equal annual installments beginning February 22, 2020. /s/Michelle R. Mekinda, as Attorney-In-Fact 2026-02-19