Gregory R. Chemnitz - 05 Sep 2025 Form 4 Insider Report for MATERION Corp (MTRN)

Role: VP General Counsel & Secretary
Signature: /s/Michelle R. Mekinda, as Attorney-In-Fact
Issuer symbol: MTRN
Transactions as of: 05 Sep 2025
Net transactions value: $0
Form type: 4
Filing time: 09 Sep 2025, 14:39:33 UTC
Previous filing: 06 Aug 2025
Next filing: 06 Nov 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Chemnitz Gregory R.	VP General Counsel & Secretary	6070 PARKLAND BLVD., MAYFIELD HEIGHTS	/s/Michelle R. Mekinda, as Attorney-In-Fact	09 Sep 2025	0001519910

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	MTRN	Restricted Stock Units	Award	$0	+5	+0.13%	$0.000000	3,961	05 Sep 2025	Common Stock	5		Direct	F1, F2, F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Each restricted stock unit represents a right to receive one share of MTRN common stock.
F2	These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the restricted stock units to which they relate.
F3	Expiration Date is the same as the Date Exercisable.