[Form 4] Materion Corporation Insider Trading Activity

Rhea-AI Filing Summary

Reporting person: Melissa A. Fashinpaur, listed as an officer (Chief Accounting Officer) and director of Materion Corporation (MTRN).
Transaction: On 09/05/2025 she was issued 3 restricted stock units (RSUs) at a reported price of $0, acquired upon reinvestment of dividend equivalents. These RSUs will vest at the same time as the related restricted stock units to which they pertain, and each RSU represents the right to one share of MTRN common stock. After the transaction she beneficially owned 2,212 common shares in a direct ownership form. The Form 4 filing was signed by an attorney-in-fact on 09/09/2025.

Insights

Corporate Governance Expert

TL;DR Routine small RSU issuance from dividend reinvestment; indicates standard executive compensation mechanics, not a material ownership change.

The Form 4 documents a minor grant of 3 RSUs to the Chief Accounting Officer that arose from reinvested dividend equivalents and will vest alongside the related awards. This is an administrative disclosure consistent with equity compensation plans and does not materially change insider ownership or control. The filing was executed by an attorney-in-fact and reports direct ownership of 2,212 shares following the transaction.

Securities Analyst

TL;DR Disclosure is routine and immaterial; no indication of buying or selling pressure from the insider.

The transaction type is acquisition via dividend-equivalent reinvestment, recorded at $0 for 3 RSUs. Such entries typically reflect plan mechanics rather than active trading decisions. Given the small size relative to total reported holdings, there is no material signal about insider views on the company’s valuation or prospects based on this Form 4 alone.

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

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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^*

Fashinpaur Melissa A

(Last) (First) (Middle)

6070 PARKLAND BOULEVARD

(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)
	Chief Accounting Officer

3. Date of Earliest Transaction (Month/Day/Year)
09/05/2025

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

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
Restricted Stock Units	(1)	09/05/2025		A		3		(2)	(3)	Common Stock	3	$0	2,212	D

Explanation of Responses:

1. Each restricted stock unit represents a right to receive one share of MTRN common stock.

2. 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.

3. Expiration Date is the same as the Date Exercisable.

Remarks:

	/s/Michelle R. Mekinda, as Attorney-In-Fact	09/09/2025
	** 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 Melissa A. Fashinpaur report on Form 4 for MTRN?

She reported the acquisition of 3 restricted stock units (RSUs) on 09/05/2025 arising from reinvested dividend equivalents.

How many shares did Melissa Fashinpaur beneficially own after the reported transaction?

She beneficially owned 2,212 shares of MTRN common stock in a direct ownership form following the transaction.

What is the price reported for the RSUs on the Form 4?

The RSUs were reported with a price of $0, reflecting that they were issued as dividend-equivalent reinvestments rather than purchased.

When was the Form 4 filed or signed?

The Form 4 was signed by an attorney-in-fact on 09/09/2025.

Do the RSUs vest immediately?

The filing states the RSUs will vest at the same time as the related restricted stock units to which they relate; no separate vesting date is provided.