[Form 4] Materion Corporation Insider Trading Activity

Rhea-AI Filing Summary

Gregory R. Chemnitz, Vice President, General Counsel & Secretary of Materion Corporation (MTRN), reported a small grant of 5 restricted stock units (RSUs) on 09/05/2025 that were acquired upon reinvestment of dividend equivalents. Each RSU represents a right to one share of common stock and will vest at the same time as the related RSUs. Following the transaction, he beneficially owns 3,961 shares directly. The reported RSUs carry a $0 purchase price. The Form 4 was signed by an attorney-in-fact, Michelle R. Mekinda, on 09/09/2025.

Positive

• Timely disclosure of insider transaction by the reporting person
• Incremental ownership recorded via dividend reinvestment (5 RSUs)
• Direct beneficial ownership of 3,961 shares is clearly stated

Negative

• None.

Insights

Corporate Governance Expert

TL;DR: Routine insider acquisition via dividend reinvestment; small in size and consistent with executive compensation practices.

The filing documents a nominal issuance of 5 RSUs to an executive who already holds 3,961 common shares directly. The units were credited as dividend equivalents and preserve original vesting schedules, indicating this is an administrative adjustment rather than a new compensation grant. No change in control, pledge, or derivative activity is reported. For governance oversight, the filing is timely and executed via attorney-in-fact as permitted.

Securities Analyst

TL;DR: Transaction is immaterial to company capitalization and investor valuation; disclosure is procedural.

Five RSUs with a reported $0 price are immaterial relative to outstanding shares and do not affect share count meaningfully. The report confirms direct beneficial ownership of 3,961 shares post-transaction. There are no derivative exercises or sales disclosed that would impact liquidity or signaling. This is a routine Section 16 disclosure of executive ownership movement.

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
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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^*

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)
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		5		(2)	(3)	Common Stock	5	$0	3,961	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 transaction did Gregory R. Chemnitz report on Form 4 for MTRN?

He reported the acquisition of 5 restricted stock units (RSUs) on 09/05/2025, credited as dividend equivalents.

How many shares does Gregory R. Chemnitz beneficially own after the transaction?

The Form 4 reports 3,961 shares beneficially owned directly following the transaction.

What is the price and vesting details for the RSUs reported?

The RSUs show a reported price of $0, and they vest at the same time as the restricted stock units to which they relate.

What is Gregory R. Chemnitz's role at Materion (MTRN)?

He is reported as VP General Counsel & Secretary and is identified on the form as an officer.

Who signed the Form 4 and when was it signed?

The form was signed by Michelle R. Mekinda, as Attorney-In-Fact, on 09/09/2025.