[Form 4] Materion Corporation Insider Trading Activity

Rhea-AI Filing Summary

Insider report summary: Craig S. Shular, a director of Materion Corporation (MTRN), reported transactions dated 09/05/2025. The filing shows non-derivative common stock activity including an acquisition (Code A) of 65.698 shares at $0 with 52,133.979 shares reported as indirectly beneficially owned through the Directors Deferred Compensation Plan, and a disposition (D) of 5,908.972 shares. The report also shows acquisition of 2 restricted stock units (RSUs) that convert 1-for-1 to common shares, increasing direct RSU holdings to 2,002. The RSUs were acquired upon reinvestment of dividend equivalents and vest no later than May 8, 2026 (or the next annual meeting).

Insights

Financial Analyst

TL;DR: Insider made small net changes via deferred comp and RSU reinvestment; disclosure is routine and not immediately material to valuation.

The filing documents director-level participation in company equity plans rather than open-market strategic buying or selling. The reported acquisition of 65.698 shares credited to a deferred compensation plan and the 2 RSUs from dividend reinvestment reflect compensation plan mechanics. The disposition of 5,908.972 shares is recorded but the context (e.g., plan rebalancing) is not specified in the form. No exercised options or cash purchases at market price are shown. Overall, the transactions align with routine director compensation and plan activity rather than a material change in ownership.

Corporate Governance Expert

TL;DR: Transactions consistent with deferred compensation and dividend-equivalent RSU reinvestment; disclosure meets Section 16 requirements.

The report identifies the reporting person as a director and shows holdings held indirectly via the Directors Deferred Comp. Plan, which is common for board members electing to defer fees into equity. The explanatory note confirms RSUs represent one share each and will vest by May 8, 2026 or at the next annual meeting. The filing is properly signed by an attorney-in-fact and includes clear descriptions of acquisition and disposition codes. From a governance perspective, these are routine plan-related transactions without additional governance red flags disclosed.

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^*

SHULAR CRAIG S

(Last) (First) (Middle)

6070 PARKLAND BLVD.

(Street)

MAYFIELD HTS., 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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

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
Common Stock	09/05/2025		A		65.698	A	$0	52,133.979	I	Held In Directors Deferred Comp. Plan
Common Stock								5,908.972	D

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		2		(2)	(3)	Common Stock	2	$0	2,002	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 (earlier of May 8, 2026 and the date of the next annual meeting of MTRN's shareholders).

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.
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FAQ

Who filed the Form 4 for MTRN and what is their role?

The reporting person is Craig S. Shular, identified as a Director of Materion Corporation (MTRN).

What transactions were reported on 09/05/2025 for MTRN?

The filing shows a Code A acquisition of 65.698 common shares at $0, a disposition of 5,908.972 common shares, and acquisition of 2 RSUs (restricted stock units).

How many shares does the reporting person beneficially own after the transactions?

The report lists 52,133.979 shares indirectly owned via the Directors Deferred Compensation Plan and 2,002 shares reflected from RSUs held directly.

What are the RSU vesting terms disclosed in the Form 4?

The RSUs were acquired upon reinvestment of dividend equivalents and will vest at the earlier of May 8, 2026 or the date of the next annual meeting of shareholders.

Was the Form 4 properly signed and filed?

Yes. The filing includes a signature by Michelle R. Mekinda, as Attorney-In-Fact dated 09/09/2025.