[Form 4] Mueller Industries, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Christopher John Miritello, an officer of Mueller Industries, Inc. (MLI), reported exercising stock options to acquire 5,330 shares on 08/18/2025 at an indicated price of $12.29 per share. After the transaction the filing shows total beneficial ownership of 131,018 shares. The Form 4 was signed by an attorney-in-fact on 08/19/2025. The filing lists the exercise as transaction code M, and includes a related option record in the derivative table.

Positive

• Officer exercised stock options to acquire 5,330 shares, increasing alignment with shareholders
• Form 4 filed and signed (attorney-in-fact), indicating compliance with Section 16 reporting obligations

Negative

• None.

Insights

Financial Analyst

TL;DR: Insider exercised vested options for 5,330 shares, a routine equity-compensation event with limited immediate market impact.

The filing documents an option exercise (transaction code M) where 5,330 shares were acquired at $12.29, raising the reporting person's total stake to 131,018 shares. This is consistent with executive compensation realization rather than an open-market purchase. The size of the transaction relative to total outstanding shares is not provided, so market-impact implications cannot be assessed from this filing alone.

Corporate Governance Expert

TL;DR: Routine disclosure of option exercise by an officer; demonstrates compliance with Section 16 reporting requirements.

The Form 4 properly reports an M-coded transaction and records beneficial ownership post-transaction. The filing identifies the reporting person as EVP, General Counsel and Secretary, and shows the form was executed by an attorney-in-fact, satisfying signature requirements. No departures from standard disclosure practices are apparent.

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^*

Miritello Christopher John

(Last) (First) (Middle)

800 HARBOR CREST DRIVE

(Street)

MEMPHIS TN 38103

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
MUELLER INDUSTRIES INC [ MLI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP, Gen. Counsel, Secretary

3. Date of Earliest Transaction (Month/Day/Year)
08/18/2025

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	08/18/2025		M		5,330	A	$12.29	131,018	D

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
Stock Option (Right-to-Buy)	$12.29	08/18/2025		M			5,330	(1)	09/14/2025	Common Stock	5,330	$0	0	D

Explanation of Responses:

1. 9/14/2020

Remarks:

	Anthony J. Steinriede, Attorney-in-Fact	08/19/2025
	** 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 for MLI report on 08/18/2025?

The filing reports that Christopher John Miritello exercised options to acquire 5,330 shares on 08/18/2025 at $12.29 per share, resulting in 131,018 shares beneficially owned.

Who is the reporting person on this MLI Form 4?

The reporting person is Christopher John Miritello, listed as an officer (EVP, General Counsel, Secretary) of Mueller Industries, Inc.

What transaction code is used and what does it indicate?

The Form 4 uses transaction code M, which is shown in the filing for the reported option exercise on 08/18/2025.

How many shares does the reporting person own after the transaction?

The filing shows 131,018 shares beneficially owned following the reported transaction.

When was the Form 4 signed?

The signature block shows the form was signed by an attorney-in-fact, Anthony J. Steinriede, on 08/19/2025.