Materion (NYSE: MTRN) insider Shelly Chadwick plans Rule 144 sale of 1,705 shares

Rhea-AI Filing Summary

Materion Corporation (MTRN) filed a notice of proposed sale of restricted or control securities. Reporting person Shelly Chadwick plans to sell 1,705 shares of common stock through Fidelity Brokerage Services LLC on the NYSE with a proposed sale date of 08/07/2026.

The filing also lists prior sales over the past three months, including a sale of 1,192 common shares on 05/08/2026 for proceeds of $237,065.08. The planned sale is categorized as compensation-related and involves issuer securities subject to Rule 144.

Key Figures

Planned shares to be sold: 1,705 shares Planned sale date: 08/07/2026 Shares sold in prior 3 months: 1,192 shares +1 more

4 metrics

Planned shares to be sold 1,705 shares Common stock sale planned under Rule 144

Planned sale date 08/07/2026 Proposed date for Rule 144 common stock sale

Shares sold in prior 3 months 1,192 shares Common stock sold on 05/08/2026

Proceeds from prior sale $237,065.08 Total proceeds from 1,192-share sale on 05/08/2026

Key Terms

Rule 144, restricted or control securities, common stock

3 terms

Rule 144 regulatory

"plans to sell 1,705 shares of common stock through a Rule 144 transaction"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

restricted or control securities regulatory

"notice of proposed sale of restricted or control securities"

common stock financial

"plans to sell 1,705 shares of common stock through Fidelity Brokerage"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

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

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Available on EDGAR 08/07/2026 - 03:34 PM Accepted by SEC EDGAR 08/07/2026 - 03:33 PM Learn about SEC filing dates

FAQ

What does Materion (MTRN) disclose in this Form 144 filing?

Materion (MTRN) discloses that Shelly Chadwick intends to sell 1,705 shares of common stock under Rule 144, with a proposed sale date of 08/07/2026 through Fidelity Brokerage Services on the NYSE.

How many Materion (MTRN) shares are planned to be sold under Rule 144?

The filing shows a planned sale of 1,705 common shares of Materion (MTRN). These shares are to be sold through Fidelity Brokerage Services LLC on the NYSE with a proposed sale date of 08/07/2026.

Who is the selling security holder in the Materion (MTRN) Form 144?

The selling security holder is Shelly Chadwick, listed with an address in Mayfield Heights, Ohio. The Form 144 covers her planned sale of 1,705 common shares of Materion under Rule 144.

What prior Materion (MTRN) stock sales are reported in the last 3 months?

The document reports that on 05/08/2026, 1,192 common shares of Materion (MTRN) were sold for total proceeds of $237,065.08. This entry appears in the section for securities sold during the past three months.

On which exchange will the Materion (MTRN) Rule 144 shares be sold?

The planned Rule 144 sale of Materion (MTRN) shares is indicated for the NYSE. The filing lists Fidelity Brokerage Services LLC as the broker arranging the sale of 1,705 common shares.

What type of securities are covered in this Materion (MTRN) Form 144?

The Form 144 covers common stock of Materion (MTRN). It specifies a planned sale of 1,705 common shares and a prior three-month sale of 1,192 common shares with proceeds of $237,065.08.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	1705	499565.00	20833725	08/07/2026	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	08/07/2026	SAR	Issuer			1705	08/07/2026	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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Shelly Chadwick 6070 Parkland Blvd. Mayfield Heights OH 44124	Common	05/08/2026	1192	237065.08

144: Remarks and Signature

Remarks

Date of Notice

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)