MTX (NYSE: MTX) Form 144 shows RSU vesting and broker details

Rhea-AI Filing Summary

The issuer disclosed a Form 144 record showing restricted common stock vesting events and related selling details. The filing lists a broker as Fidelity Brokerage Services LLC and includes numeric entries such as 3655141.03 and 31008734 with an NYSE listing and date 05/06/2026.

Key Figures

Filing date: 05/06/2026 Numeric line: 3655141.03 Numeric line: 31008734 +2 more

5 metrics

Filing date 05/06/2026 Form 144 header date

Numeric line 3655141.03 Listed in filing rows alongside broker and securities

Numeric line 31008734 Listed in filing rows alongside broker and securities

Exchange NYSE Exchange label shown in filing header

Sample vesting entry 4,125 shares Entry shown for 01/20/2016 Restricted Stock Vesting

Key Terms

Restricted Stock Vesting, Filer Information, Securities To Be Sold

3 terms

Restricted Stock Vesting financial

"Common | 01/20/2016 | Restricted Stock Vesting | Issuer"

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.

Filer Information regulatory

"144: Filer Information"

Securities To Be Sold regulatory

"144: Securities To Be Sold"

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	46030	3655141.03	31008734	05/06/2026	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	09/21/2012	Restricted Stock Vesting	Issuer			542	09/21/2012	Compensation
Common	01/25/2013	Restricted Stock Vesting	Issuer			922	01/25/2013	Compensation
Common	09/21/2013	Restricted Stock Vesting	Issuer			510	09/21/2013	Compensation
Common	01/22/2014	Restricted Stock Vesting	Issuer			876	01/22/2014	Compensation
Common	01/25/2014	Restricted Stock Vesting	Issuer			1075	01/25/2014	Compensation
Common	03/20/2014	Restricted Stock Vesting	Issuer			94	03/20/2014	Compensation
Common	09/21/2014	Restricted Stock Vesting	Issuer			535	09/21/2014	Compensation
Common	01/22/2015	Restricted Stock Vesting	Issuer			1688	01/22/2015	Compensation
Common	01/25/2015	Restricted Stock Vesting	Issuer			1061	01/25/2015	Compensation
Common	03/20/2015	Restricted Stock Vesting	Issuer			72	03/20/2015	Compensation
Common	01/20/2016	Restricted Stock Vesting	Issuer			4125	01/20/2016	Compensation
Common	01/22/2016	Restricted Stock Vesting	Issuer			1753	01/22/2016	Compensation
Common	03/20/2016	Restricted Stock Vesting	Issuer			72	03/20/2016	Compensation
Common	08/23/2016	Restricted Stock Vesting	Issuer			1523	08/23/2016	Compensation
Common	08/31/2016	Restricted Stock Vesting	Issuer			1301	08/31/2016	Compensation
Common	01/19/2017	Restricted Stock Vesting	Issuer			1489	01/19/2017	Compensation
Common	01/20/2017	Restricted Stock Vesting	Issuer			4250	01/20/2017	Compensation
Common	01/22/2017	Restricted Stock Vesting	Issuer			797	01/22/2017	Compensation
Common	01/17/2018	Restricted Stock Vesting	Issuer			680	01/17/2018	Compensation
Common	01/19/2018	Restricted Stock Vesting	Issuer			1268	01/19/2018	Compensation
Common	01/20/2018	Restricted Stock Vesting	Issuer			3439	01/20/2018	Compensation
Common	01/17/2019	Restricted Stock Vesting	Issuer			760	01/17/2019	Compensation
Common	01/19/2019	Restricted Stock Vesting	Issuer			1373	01/19/2019	Compensation
Common	01/23/2019	Restricted Stock Vesting	Issuer			886	01/23/2019	Compensation
Common	06/01/2019	Restricted Stock Vesting	Issuer			202	06/01/2019	Compensation
Common	01/17/2020	Restricted Stock Vesting	Issuer			760	01/17/2020	Compensation
Common	01/22/2020	Restricted Stock Vesting	Issuer			1834	01/22/2020	Compensation
Common	01/23/2020	Restricted Stock Vesting	Issuer			886	01/23/2020	Compensation
Common	06/01/2020	Restricted Stock Vesting	Issuer			202	06/01/2020	Compensation
Common	01/21/2021	Restricted Stock Vesting	Issuer			1612	01/21/2021	Compensation
Common	01/22/2021	Restricted Stock Vesting	Issuer			1831	01/22/2021	Compensation
Common	01/23/2021	Restricted Stock Vesting	Issuer			886	01/23/2021	Compensation
Common	06/01/2021	Restricted Stock Vesting	Issuer			202	06/01/2021	Compensation
Common	01/21/2022	Restricted Stock Vesting	Issuer			1615	01/21/2022	Compensation
Common	01/22/2022	Restricted Stock Vesting	Issuer			1831	01/22/2022	Compensation
Common	01/26/2022	Restricted Stock Vesting	Issuer			1516	01/26/2022	Compensation
Common	01/21/2023	Restricted Stock Vesting	Issuer			1562	01/21/2023	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

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)