[Form 4] MATERION Corp Insider Trading Activity

Rhea-AI Filing Summary

Materion (MTRN) executive VP General Counsel & Secretary reported multiple transactions on 11/04/2025. The insider exercised stock appreciation rights, acquiring 1,459 shares at $68.82 and 2,254 shares at $80.85. Shares were withheld for taxes, disposing of 1,053 at $112.96 and 1,796 at $113.13, and an open-market sale of 864 shares at $113.226 occurred the same day. Following these transactions, the insider directly owned 10,376 shares and indirectly held 5,337.344 shares in a 401(k) plan.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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 for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Chemnitz Gregory R.

(Last) (First) (Middle)

6070 PARKLAND BLVD.

(Street)

MAYFIELD HEIGHTS OH 44124

(City) (State) (Zip)

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

3. Date of Earliest Transaction (Month/Day/Year)
11/04/2025

4. If Amendment, Date of 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

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	11/04/2025		M		1,459	A	$68.82	11,835	D
Common Stock	11/04/2025		F		1,053	D	$112.96	10,782	D
Common Stock	11/04/2025		M		2,254	A	$80.85	13,036	D
Common Stock	11/04/2025		F		1,796	D	$113.13	11,240	D
Common Stock	11/04/2025		S		864	D	$113.226	10,376	D
Common Stock								5,337.344	I	Held in 401(k) Plan

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 Securities Underlying Derivative Security (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: 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
Stock Appreciation Rights	$68.82	11/04/2025		M			1,459	(1)	02/17/2028	Common Stock	1,459	$0	0	D
Stock Appreciation Rights	$80.85	11/04/2025		M			2,254	(2)	03/01/2029	Common Stock	2,254	$0	0	D

Explanation of Responses:

1. The Stock Appreciation Rights vested in three equal annual installments beginning February 17, 2022.

2. The Stock Appreciation Rights vested in three equal annual installments beginning March 1, 2023.

Remarks:

	/s/ Christina Zalanka, as Attorney-In-Fact	11/06/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did Materion (MTRN) report in this Form 4?

An officer exercised SARs and conducted tax withholdings and a sale on 11/04/2025, then updated direct and indirect holdings.

How many shares were acquired via SAR exercise for MTRN?

The insider acquired 1,459 shares at $68.82 and 2,254 shares at $80.85 through Code M transactions.

Were any shares sold or withheld for taxes?

Yes. 1,053 shares at $112.96 and 1,796 shares at $113.13 were disposed under Code F, and 864 shares at $113.226 were sold (Code S).

What are the insider’s holdings after the transactions?

Direct ownership is 10,376 shares, with 5,337.344 shares held indirectly in a 401(k) plan.

Who is the reporting person and role at Materion (MTRN)?

The reporting person is an Officer: VP General Counsel & Secretary.

What were the vesting details of the SARs?

One grant vested in three equal annual installments beginning Feb 17, 2022; another began Mar 1, 2023.