[Form 4] Materion Corporation Insider Trading Activity

Rhea-AI Filing Summary

Core Laboratories Inc. (CLB) – Form 4 insider update. On 08/01/2025, Chief Accounting Officer & Treasurer Teo Sow Hang reported multiple transactions involving the company’s common stock.

• Restricted-share vesting: 200 and 240 restricted shares converted to common stock (Code M) at a stated price of $0, adding 440 shares.
• Dispositions: 90 and 108 shares were disposed of (Code F) at $10.53 per share, totaling 198 shares sold.
• Net share change: +242 shares for the day, bringing the officer’s direct holdings to 7,748.334 common shares.
• Derivative position: Following the transactions, 8,004 restricted shares remain outstanding.

The filing reflects routine vesting and tax-related sales with a modest increase in ownership. No information on 10b5-1 plans, market impact, or company fundamentals is provided.

Insights

Financial Analyst

TL;DR: Routine vesting; immaterial to CLB valuation.

The CAO’s Form 4 shows 440 restricted shares vesting and 198 shares sold for $10.53, netting a 242-share increase. The total value traded (≈$2.1 k) is negligible relative to CLB’s market cap, so the event is non-impactful for investors. Such filings are common around vesting anniversaries and do not signal a strategic shift or altered insider sentiment.

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^*

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)
08/01/2025

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	08/01/2025		M		1,214	A	$0	1,490	D
Common Stock	08/01/2025		F		350	D	$105.07	1,140	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)	08/01/2025		M			1,214	(2)	(3)	Common Stock	1,214	$0	2,209	D

Explanation of Responses:

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

2. Consists of restricted stock units granted on 03/01/2023, 03/01/2024, and 03/01/2025 that will vest in three substantially equal annual installments on the first three anniversaries of the grant date, and restricted stock units granted on 03/01/2025 that will vest in a single installment on 03/01/2028.

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

Remarks:

	/s/Michelle R. Mekinda, as Attorney-In-Fact	08/05/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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