MATERION (MTRN) CAO logs stock sale and new RSU awards

Rhea-AI Filing Summary

MATERION Corp Chief Accounting Officer Melissa A. Fashinpaur reported several equity transactions in company securities. She sold 309 shares of common stock in an open-market sale at 160.0000 per share, leaving 310 common shares held directly after this sale.

On a prior date, 302 common shares were disposed of to cover taxes through a tax-withholding transaction at 166.5900 per share. She also acquired 659 shares of common stock through the exercise and conversion of restricted stock units.

In derivative securities, she acquired 659 restricted stock units through an exercise and an additional 628 restricted stock units as a grant or award. Each restricted stock unit represents the right to receive one share of MTRN common stock, with various grants vesting in three equal annual installments, including a grant beginning vesting on March 1, 2027.

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

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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)
03/01/2026

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	03/01/2026		M		659	A	$0	921	D
Common Stock	03/02/2026		F		302	D	$166.59	619	D
Common Stock	03/03/2026		S		309	D	$160	310	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)	03/01/2026		M			659	(2)	(3)	Common Stock	659	$0	1,607	D
Restricted Stock Units	(1)	03/01/2026		A		628		(4)	(3)	Common Stock	628	$0	2,235	D

Explanation of Responses:

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

2. These restricted stock units granted on 03/01/2023, 03/01/2024, and 03/01/2025, and any related dividend equivalents, vest in three equal annual installments.

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

4. These restricted stock units vest in three equal annual installments beginning March 1, 2027.

Remarks:

	/s/Michelle R. Mekinda, as Attorney-In-Fact	03/03/2026
	** 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 insider transactions did MTRN Chief Accounting Officer Melissa Fashinpaur report?

Melissa A. Fashinpaur reported multiple transactions in MATERION common stock and restricted stock units, including an open-market sale, a tax-withholding share disposition, an RSU-related share acquisition, and new restricted stock unit awards tied to multi-year vesting schedules.

How many MTRN shares did Melissa Fashinpaur sell in the latest Form 4?

She sold 309 shares of MATERION common stock in an open-market transaction. The sale price was 160.0000 per share, and after this sale she held 310 common shares directly, according to the reported post-transaction ownership balance.

What tax-withholding transaction did the MTRN officer report on this Form 4?

The filing shows a tax-withholding disposition of 302 common shares at 166.5900 per share. This type of transaction generally satisfies tax obligations by delivering shares instead of cash, reducing directly held shares but not reflecting a discretionary market sale.

What restricted stock unit activity did MTRN report for Melissa Fashinpaur?

She reported acquiring 659 restricted stock units through an exercise and 628 restricted stock units as a new grant. Each unit represents the right to receive one MTRN share, with grants vesting in three equal annual installments under defined vesting schedules.

How do the reported MTRN restricted stock units for Melissa Fashinpaur vest over time?

Certain restricted stock units granted in 2023, 2024, and 2025 vest in three equal annual installments. An additional grant of restricted stock units vests in three equal annual installments beginning March 1, 2027, aligning awards with a multi-year retention horizon.

What is Melissa Fashinpaur’s direct ownership in MTRN common stock after the reported sale?

After selling 309 shares in the open market, her directly held MATERION common stock position is reported as 310 shares. This post-transaction figure reflects the remaining common shares held following the disclosed sale transaction on the specified date.