Materion (MTRN) Form 4 — Officer Disposes 3,000 Shares; 401(k) Holding Disclosed

Rhea-AI Filing Summary

Form 4 filed for MTRN (Materion Corp): Reporting person Chemnitz Gregory R., VP General Counsel & Secretary, reported sales on 08/04/2025. The Form shows two non-derivative common stock dispositions: 918 shares sold at a weighted-average price of $104.6484 and 2,082 shares sold at a weighted-average price of $105.4008. Following those transactions, reported direct beneficial ownership is shown as 12,458 shares and 10,376 shares on the respective lines. The filing also discloses 5,330.705 shares held indirectly in a 401(k) plan. Footnotes state the sales occurred across multiple prices within specified ranges and the filer offers to provide per-price sale breakdowns on request. The form is signed by an attorney-in-fact on 08/06/2025.

Positive

• None.

Negative

• Officer sale disclosed: Reporting person sold a total of 3,000 common shares on 08/04/2025 (918 and 2,082 shares) at weighted-average prices of $104.6484 and $105.4008.

Insights

Financial Analyst

TL;DR: Officer reported routine open-market sales totaling 3,000 shares at weighted-average prices near $105; disclosures include 401(k) holdings.

This Form 4 documents two open-market dispositions by an officer on 08/04/2025 totaling 3,000 common shares (918 at a weighted-average of $104.6484 and 2,082 at $105.4008). The filing specifies post-transaction direct holdings on the two reported lines and discloses 5,330.705 shares held indirectly in a 401(k) account. Footnotes clarify the sales were executed in multiple transactions across stated price ranges and that further per-price details are available on request. From an analytical perspective, the filing is a standard disclosure of insider selling activity; no derivatives, grants, or purchases are reported.

Impact assessment: 0 (Neutral). This is routine insider selling disclosure without additional material context provided in the form.

Corporate Governance Expert

TL;DR: Timely Form 4 reports officer sales and indirect 401(k) holdings; no governance red flags or new control changes disclosed.

The submission identifies the reporting person as an officer (VP General Counsel & Secretary) and includes signature by an attorney-in-fact dated 08/06/2025. The filing discloses specific weighted-average sale prices and notes that sales occurred at multiple prices within defined ranges, with an offer to provide detailed breakdowns. There are no indications of departures, control transfers, option exercises, or material corporate actions in this document. The disclosure meets Section 16 reporting requirements for changes in beneficial ownership.

Impact assessment: 0 (Neutral). The reported transactions are routine and do not, in this filing alone, suggest governance concerns.

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^*

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)
08/04/2025

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	08/04/2025		S		918	D	$104.6484(1)(2)	12,458	D
Common Stock	08/04/2025		S		2,082	D	$105.4008(3)	10,376	D
Common Stock								5,330.705	I	Held in 401(k) Plan

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 $104.2300 to $105.1750, inclusive.

2. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1) and (3) of this Form 4.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.2300 to $105.5500, inclusive.

Remarks:

	/s/Michelle R. Mekinda, as Attorney-In-Fact	08/06/2025
	** 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 did the Form 4 filed for MTRN on 08/06/2025 report?

The form reports that Chemnitz Gregory R. sold shares on 08/04/2025 and the filing was signed by an attorney-in-fact on 08/06/2025.

How many shares did the reporting person sell in the Form 4 for MTRN?

The filing shows two dispositions totaling 3,000 shares: 918 and 2,082 shares sold on 08/04/2025.

At what prices were the MTRN shares sold according to the Form 4?

Sales were reported at weighted-average prices of $104.6484 (range $104.2300–$105.1750) and $105.4008 (range $105.2300–$105.5500).

Does the Form 4 disclose any indirect holdings for the reporting person?

Yes. The form discloses 5,330.705 shares held indirectly in a 401(k) plan.

What is the reporting person’s role at Materion (MTRN)?

The Form 4 lists the reporting person as an Officer with the title VP General Counsel & Secretary.