[144] Mine Safety Incorporated SEC Filing

Rhea-AI Filing Summary

Mine Safety Incorporated (MSA) filed a Form 144 notifying the proposed sale of 5,000 common shares, with an aggregate market value of $861,879.87, to be sold on or about 09/11/2025 on the NYSE through Fidelity Brokerage Services LLC.

The shares were acquired via restricted stock vesting: 366 shares vested on 03/08/2025 and 4,634 shares vested on 09/01/2025. Payment for the vested shares is identified as compensation. The filer reports no sales of the issuer's securities in the past three months and includes the required attestation about the absence of undisclosed material adverse information.

Positive

• Compliance: Form 144 filed specifying broker, sale date, and aggregate market value ($861,879.87).
• Transparency: Acquisition details shown (restricted stock vesting dates and amounts: 366 on 03/08/2025 and 4,634 on 09/01/2025).

Negative

• Insider liquidity: Proposed sale of 5,000 shares may increase share supply in the near term.

Insights

Securities Analyst

TL;DR Routine insider sale filing disclosing a proposed disposition of 5,000 shares (~$862k) following restricted stock vesting.

The Form 144 documents a proposed sale executed through a broker on the NYSE and ties the holdings directly to recent restricted stock vesting events, with amounts and acquisition dates disclosed. This is a standard compliance filing that notifies the market of an insider liquidity event rather than an operational development. Investors should note the size of the sale relative to outstanding shares (5,000 of 39,143,220 outstanding) to assess potential share supply impact; here it represents a de minimis percentage.

Corporate Governance Expert

TL;DR Filing indicates transparent disclosure of executive/insider compensation conversion and planned sale; procedural compliance is evident.

The filing clearly states the nature of acquisition as restricted stock vesting and identifies the broker and sale date. The attestation about no undisclosed material adverse information is present as required. From a governance perspective, timely Form 144 filing supports disclosure obligations; the document does not contain other governance changes or material corporate actions.

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	5000	861879.87	39143220	09/11/2025	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	03/08/2025	Restricted Stock Vesting	Issuer			366	03/08/2025	Compensation
Common	09/01/2025	Restricted Stock Vesting	Issuer			4634	09/01/2025	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)

FAQ

What does Mine Safety Incorporated's Form 144 disclose (MSA)?

The filing notifies a proposed sale of 5,000 common shares valued at $861,879.87, to be sold on or about 09/11/2025 on the NYSE via Fidelity Brokerage Services LLC.

How were the shares being sold acquired?

The shares were acquired through restricted stock vesting: 366 shares on 03/08/2025 and 4,634 shares on 09/01/2025, with payment characterized as compensation.

Has the filer sold any MSA securities in the past three months?

The Form 144 states "Nothing to Report" for securities sold during the past three months.

Through which broker will the MSA shares be sold?

The sale is planned through Fidelity Brokerage Services LLC (900 Salem Street, Smithfield, RI).

What representation does the filer make about material information?

The filer attests by signature that they do not know any material adverse information