CFO of MATERION Corp (MTRN) reports open-market sale of 8,976 shares

Rhea-AI Filing Summary

MATERION Corp Vice President, Finance & CFO Shelly Marie Chadwick reported selling a total of 8,976 shares of common stock in open-market transactions. She sold 3,975 shares at a weighted average price of $145.029 and 5,001 shares at $147.000 per share. After these sales, she directly owns 16,139 shares of MATERION common stock.

The filing notes that part of the sale at the weighted average price of $145.029 was executed in multiple trades within a price range of $144.960 to $145.500.

Insider Trade Summary

Net Seller: 8,976 shares ($1,311,637)

Net Sell 2 txns

Insider Chadwick Shelly Marie

Role Vice President, Finance & CFO

Sold 8,976 shs ($1.31M)

Type	Security	Shares	Price	Value
Sale	Common Stock	3,975	$145.029	$576K
Sale	Common Stock	5,001	$147.00	$735K

Holdings After Transaction: Common Stock — 21,140 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

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^*

Chadwick Shelly Marie

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Vice President, Finance & CFO

3. Date of Earliest Transaction (Month/Day/Year)
02/23/2026

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	02/23/2026		S		3,975	D	$145.029(1)	21,140	D
Common Stock	02/23/2026		S		5,001	D	$147	16,139	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

Explanation of Responses:

1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $144.960 to 145.500, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the Staff of the Security and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Remarks:

	/s/Michelle R. Mekinda, as Attorney-In-Fact	02/25/2026
	** 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 transaction did MATERION Corp (MTRN) report for Shelly Marie Chadwick?

MATERION Corp reported that Vice President, Finance & CFO Shelly Marie Chadwick sold a total of 8,976 common shares in open-market transactions. These sales were disclosed on a Form 4 insider trading report.

At what prices did Shelly Marie Chadwick sell MATERION (MTRN) shares?

Shelly Marie Chadwick sold 3,975 shares at a weighted average price of $145.029 and 5,001 shares at $147.000 per share. One sale involved multiple trades between $144.960 and $145.500.

How many MATERION Corp (MTRN) shares does Shelly Marie Chadwick own after the sale?

After the reported transactions, Shelly Marie Chadwick directly owns 16,139 shares of MATERION common stock. This figure reflects her remaining direct ownership following the total sale of 8,976 shares disclosed on the Form 4.

What is the role of Shelly Marie Chadwick at MATERION Corp (MTRN)?

Shelly Marie Chadwick serves as MATERION Corp’s Vice President, Finance & Chief Financial Officer. Her Form 4 filing reports personal open-market sales of the company’s common stock, which executives must disclose under insider trading regulations.

Were Shelly Marie Chadwick’s MATERION (MTRN) share sales executed in multiple trades?

Yes. The Form 4 notes a weighted average price of $145.029 for 3,975 shares, sold in multiple transactions between $144.960 and $145.500. The insider undertakes to provide detailed trade-level information upon request.