Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * Chemnitz Gregory R. 2. Issuer Name and Ticker or Trading Symbol MATERION Corp [MTRN] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) VP General Counsel & Secretary (Last) (First) (Middle) 6070 PARKLAND BLVD. 3. Date of Earliest Transaction (Month/Day/Year) 03/01/2026 (Street) MAYFIELD HEIGHTS, OH 44124 4. If Amendment, Date Original Filed (Month/Day/Year) 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 03/01/2026 M 2,003 A $ 0 10,575 D Common Stock 03/02/2026 F 1,211 D $166.59 9,364 D Common Stock 03/03/2026 M 3,040 A $113.28 12,404 D Common Stock 03/03/2026 M 1,471 A $135.58 13,875 D Common Stock 03/03/2026 M 1,017 A $87.36 14,892 D Common Stock 03/03/2026 F 4,445 D $157.26 10,447 D Common Stock 03/03/2026 S 1,083 D $157.515 9,364 D Common Stock 03/03/2026 S 3,434 D $157.26 5,930 D Common Stock 5,343.175 I Held in 401(k) Plan

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Underlying Securities (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(1)	03/01/2026		M			2,003	(2)	(3)	Common Stock	2,003	$ 0	2,060	D
Restricted Stock Units	(1)	03/01/2026		A		1,479		(4)	(3)	Common Stock	1,479	$ 0	3,539	D
Stock Appreciation Rights	$166.59	03/01/2026		A		2,265		(5)	03/01/2033	Common Stock	2,265	$ 0	2,265	D
Stock Appreciation Rights	$113.28	03/03/2026		M			3,040	(6)	03/01/2030	Common Stock	3,040	$ 0	0	D
Stock Appreciation Rights	$135.58	03/03/2026		M			1,471	(7)	03/01/2031	Common Stock	1,471	$ 0	736	D
Stock Appreciation Rights	$87.36	03/03/2026		M			1,017	(8)	03/01/2032	Common Stock	1,017	$ 0	2,034	D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Chemnitz Gregory R. 6070 PARKLAND BLVD. MAYFIELD HEIGHTS, OH 44124			VP General Counsel & Secretary

Signatures

/s/Michelle R. Mekinda, as Attorney-In-Fact		03/03/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Each restricted stock unit represents a right to receive one share of MTRN common stock.
(2)	These restricted stock units granted on 03/01/2023, 03/01/2024, and 03/01/2025, and any related dividend equivalents, vest in three equal annual installments.
(3)	Expiration Date is the same as the Date Exercisable.
(4)	These restricted stock units vest in three equal annual installments beginning March 1, 2027.
(5)	The Stock Appreciation Rights vest in three equal annual installments beginning March 1, 2027.
(6)	The Stock Appreciation Rights vested in three equal annual installments beginning March 1, 2024.
(7)	These Stock Appreciation Rights vest in three equal installments beginning March 1, 2025.
(8)	These Stock Appreciation Rights vest in three equal annual installments beginning March 1, 2026.

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