Mueller Industries Insider Sale: 66,029 Shares Sold Under 10b5-1 Plan

Rhea-AI Filing Summary

Mueller Industries insider sale reported on Form 4: Martin Jeffrey Andrew, EVP, CFO & Treasurer, sold 66,029 shares of Mueller Industries, Inc. (MLI) on 08/29/2025. The sale was executed pursuant to a previously disclosed Rule 10b5-1 trading plan and reported at a weighted-average price of $95.6054, with individual trade prices ranging from $95.24 to $96.54. After the reported sale, the reporting person beneficially owned 305,358 shares. The Form 4 was signed by an attorney-in-fact on 09/02/2025. All information is taken directly from the filed Form 4 and reflects a planned disposition under an established trading arrangement.

Positive

• Transaction executed under a disclosed Rule 10b5-1 plan, indicating pre-planned trading and reduced concerns about opportunistic timing
• Weighted-average sale price disclosed ($95.6054) and explicit price range ($95.24–$96.54), providing price transparency
• Post-transaction beneficial ownership reported (305,358 shares), clarifying current holdings

Negative

• Insider sold 66,029 shares, a sizable absolute number that may be material to some investors' perception
• Form 4 shows sale code S (disposition) which reduces insider shareholdings without accompanying contextual company information in this filing

Insights

Financial Analyst

TL;DR: Routine, pre-planned insider sale under a 10b5-1 plan; disclosed volume and weighted-average price provided.

The reported transaction is a sale of 66,029 shares executed under a previously disclosed Rule 10b5-1 trading plan, minimizing implication of opportunistic timing. The filing discloses a weighted-average sale price of $95.6054 and a price range of $95.24–$96.54. Post-transaction beneficial ownership is stated as 305,358 shares. From a market-impact perspective, this is a clear, procedural disclosure rather than a company performance signal; the 10b5-1 plan designation indicates the trades were pre-authorized.

Corporate Governance Expert

TL;DR: Compliance-focused disclosure; use of an attorney-in-fact and 10b5-1 plan indicates formal governance processes.

The Form 4 shows adherence to insider trading disclosure rules, including explicit notation that transactions were effected pursuant to a Rule 10b5-1 plan and a signed submission by an attorney-in-fact. This supports transparency in executive trading activity. The filing does not indicate any amendment or additional disclosures beyond the sale and resulting beneficial ownership balance.

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).

X

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^*

Martin Jeffrey Andrew

(Last) (First) (Middle)

5435 COLLINGWOOD COVE

(Street)

MEMPHIS TN 38120

(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, CFO & Treasurer

3. Date of Earliest Transaction (Month/Day/Year)
08/29/2025

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	08/29/2025		S(1)		66,029	D	$95.6054(2)	305,358	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

Explanation of Responses:

1. This form reflects the sale of shares which may be deemed to be beneficially owned by the Reporting Person. The sale was effected pursuant to a previously disclosed Rule 10b5-1 trading plan.

2. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $95.24 to $96.54, inclusive.

Remarks:

	Anthony J. Steinriede, Attorney-in-Fact	09/02/2025
	** 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 Mueller Industries insider Jeffrey Martin sell according to the Form 4?

The Form 4 reports a sale of 66,029 shares of Mueller Industries, Inc. (MLI) by Martin Jeffrey Andrew.

When were the shares sold and under what authorization?

The shares were sold on 08/29/2025 and the sale was effected pursuant to a previously disclosed Rule 10b5-1 trading plan.

What price did the insider receive for the shares?

A weighted-average price of $95.6054 is reported; individual trades ranged from $95.24 to $96.54.

How many Mueller Industries shares does the reporting person own after the sale?

The Form 4 reports beneficial ownership of 305,358 shares following the reported transaction.

Who filed or signed the Form 4?

The Form 4 was signed by an Attorney-in-Fact, Anthony J. Steinriede, dated 09/02/2025.

What is the reporting person’s role at Mueller Industries?

The reporting person is listed as EVP, CFO & Treasurer of Mueller Industries, Inc.