Form 144: Insider intends to sell 3,500 shares

Issuer reported an intended resale of 3,500 shares of Common Stock via broker Fidelity Brokerage Services LLC.

Rhea-AI Filing Summary

Issuer reported an intended resale of 3,500 shares of Common Stock via broker Fidelity Brokerage Services LLC. The excerpt lists restricted stock vesting events of 342, 1,152, and 2,006 shares on 05/05/2023, 05/09/2024, and 05/07/2026 respectively. The filing is a Form 144 notice of securities to be sold.

Insights

Securities Compliance Counsel

Routine Form 144 resale notice listing broker and vesting amounts.

The excerpt shows a broker (Fidelity Brokerage Services LLC) and an indicated sale quantity of 3,500 shares. Several restricted stock vesting entries are listed with exact share counts and vesting dates.

Timing and final disposition details are not included in the excerpt; subsequent filings or broker confirmations would show whether the resale was executed.

Key Figures

Securities to be sold: 3,500 shares Restricted stock vesting: 342 shares Restricted stock vesting: 1,152 shares +1 more

4 metrics

Securities to be sold 3,500 shares listed alongside broker Fidelity Brokerage Services LLC

Restricted stock vesting 342 shares vesting date <date>05/05/2023</date>

Restricted stock vesting 1,152 shares vesting date <date>05/09/2024</date>

Restricted stock vesting 2,006 shares vesting date <date>05/07/2026</date>

Key Terms

Restricted Stock Vesting, Form 144, Fidelity Brokerage Services LLC

3 terms

Restricted Stock Vesting financial

"Common | 05/05/2023 | Restricted Stock Vesting"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

Form 144 regulatory

"CONTENT METADATA: form_type: "144""

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Fidelity Brokerage Services LLC other

"Common | Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the MTRN Form 144 disclose?

The Form 144 discloses an intended resale of 3,500 shares of Common Stock through Fidelity Brokerage Services LLC and lists restricted stock vesting entries of 342, 1,152, and 2,006 shares on specific dates.

Who is the broker listed on the filing for MTRN?

The filing lists Fidelity Brokerage Services LLC with an address in Smithfield, RI as the broker handling the resale of the Common Stock as indicated in the excerpt.

Which restricted stock vesting events are shown in the excerpt?

The excerpt shows vesting events for Common Stock of 342 shares on 05/05/2023, 1,152 shares on 05/09/2024, and 2,006 shares on 05/07/2026 listed as compensation vesting entries.

Does Form 144 confirm the sale was completed for MTRN?

No; the Form 144 excerpt indicates an intended resale of 3,500 shares but does not confirm execution. Confirmation would appear in later trade reports or brokerage records, not in this excerpt.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/29/2026 - 12:42 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001213190
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	MATERION Corp
SEC File Number	001-15885
Address of Issuer	6070 PARKLAND BLVD. MAYFIELD HTS. OHIO 44124
Phone	2163834931
Name of Person for Whose Account the Securities are To Be Sold	PHILLIPPY ROBERT J
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	3500	765164.10	20801485	05/29/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	05/05/2023	Restricted Stock Vesting	Issuer			342	05/05/2023	Compensation
Common	05/09/2024	Restricted Stock Vesting	Issuer			1152	05/09/2024	Compensation
Common	05/07/2026	Restricted Stock Vesting	Issuer			2006	05/07/2026	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	05/29/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Robert Phillippy
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)