Mueller Industries (MLI) CEO Gregory reports sale of 340,000 shares

Rhea-AI Filing Summary

Mueller Industries Inc. Chairman and CEO Christopher L. Gregory reported open-market sales of a total of 340,000 shares of Common Stock on August 10–11, 2026. These included 70,000 and 200,000 directly held shares and 70,000 indirectly held shares in trusts, at weighted average prices around the high-$60s per share, leaving him with over 1.5 million directly held shares plus various indirect holdings.

Insider Trade Summary

Net Seller: 340,000 shares

Net Sell 5 txns

Insider Christopher Gregory L.

Role Chairman of the Board & CEO

Sold 340,000 shs ($23.38M)

Type	Security	Shares	Price	Value
Sale	Common Stock F2	70,000	$69.428	$4.86M
Sale	Common Stock F3	200,000	$68.442	$13.69M
Sale	Common Stock F1	70,000	$69.085	$4.84M
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 70,000 shares (Indirect, by trust where spouse is beneficiary); Common Stock — 75,040 shares (Indirect, by trust where he is beneficiary); Common Stock — 1,598,850 shares (Direct); Common Stock — 27,200 shares (Indirect, by children); Common Stock — 268,784 shares (Indirect, by spouse)

Footnotes (3)

1. F1. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $68.76 to $69.575, inclusive.
2. F2. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $68.58 to $69.875, inclusive.
3. F3. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $68.26 to $69.0852, inclusive.

Key Figures

Total shares sold: 340000 shares Sale on 2026-08-10: 70000 shares at $69.0850 Indirect sale on 2026-08-11: 70000 shares at $69.4280 +5 more

8 metrics

Total shares sold 340000 shares Aggregate non-derivative Common Stock sales on August 10–11, 2026

Sale on 2026-08-10 70000 shares at $69.0850 Indirect sale by trust where spouse is beneficiary; weighted average price with trades from $68.76 to $69.575

Indirect sale on 2026-08-11 70000 shares at $69.4280 Indirect sale by trust where he is beneficiary; weighted average price with trades from $68.58 to $69.875

Direct sale on 2026-08-11 200000 shares at $68.4420 Direct sale; weighted average price with trades from $68.26 to $69.0852

Direct holdings after sale 1598850 shares Common Stock directly owned by Christopher L. Gregory following 200,000-share sale on 2026-08-11

Indirect trust holdings after sale 75040 shares Common Stock held by trust where he is beneficiary after the 70,000-share sale on 2026-08-11

Spouse indirect holdings 268784 shares Common Stock held indirectly by spouse as of 2026-08-10 holding entry

Children indirect holdings 27200 shares Common Stock held indirectly by children as of 2026-08-10 holding entry

Key Terms

weighted average price, indirect ownership, beneficiary

3 terms

weighted average price financial

"The price reported is a weighted average price. These shares were sold in multiple transactions..."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

indirect ownership financial

"Ownership type is reported as indirect, including shares held by trusts, spouse, and children."

beneficiary financial

"Shares are held by a trust where he is beneficiary or where spouse is beneficiary."

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/12/2026 - 04:48 PM Accepted by SEC EDGAR 08/12/2026 - 04:47 PM Learn about SEC filing dates

FAQ

What did Mueller Industries (MLI) disclose in this Form 4 filing?

Mueller Industries (MLI) disclosed that Chairman and CEO Christopher L. Gregory sold 340,000 shares of Common Stock in open-market transactions on August 10–11, 2026, and reported his remaining direct and indirect share holdings after these sales.

How many Mueller Industries (MLI) shares did the CEO sell and at what prices?

Christopher L. Gregory sold 340,000 shares of Mueller Industries Common Stock at weighted average prices of about $69.09, $69.43, and $68.44 per share, with individual trades occurring within specified price ranges in the high-$60s.

What are Christopher L. Gregory’s remaining direct holdings in Mueller Industries (MLI)?

After the reported sales, Christopher L. Gregory held 1,598,850 shares of Mueller Industries Common Stock directly. This figure is disclosed as the total shares beneficially owned directly following the 200,000-share open-market sale on August 11, 2026.

What indirect Mueller Industries (MLI) share holdings are reported for the CEO and his family?

Indirect holdings include 75,040 shares held by a trust where he is beneficiary, 70,000 shares by a trust where his spouse is beneficiary, 27,200 shares held by children, and 268,784 shares held by his spouse, all reported as indirect ownership positions.

Were the Mueller Industries (MLI) CEO share sales under a Rule 10b5-1 trading plan?

The filing’s Rule 10b5-1 checkbox is marked false, and the footnotes do not reference any Rule 10b5-1 trading plan, indicating these sales were not affirmatively reported as occurring under a pre-arranged trading plan.

What do the weighted average price footnotes mean in the Mueller Industries (MLI) Form 4?

Each reported price is a weighted average across multiple trades. Footnotes state that the 70,000-share and 200,000-share blocks were executed in numerous transactions within specific ranges, such as $68.26 to $69.0852 per share, rather than at a single trade price.

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^*

Christopher Gregory L.

(Last) (First) (Middle)

2530 JOHNSON ROAD

(Street)

GERMANTOWN TENNESSEE 38139

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chairman of the Board & CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/10/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	08/10/2026		S		70,000	D	$69.085(1)	70,000	I	by trust where spouse is beneficiary
Common Stock	08/11/2026		S		70,000	D	$69.428(2)	75,040	I	by trust where he is beneficiary
Common Stock	08/11/2026		S		200,000	D	$68.442(3)	1,598,850	D
Common Stock								27,200	I	by children
Common Stock								268,784	I	by spouse

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. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $68.76 to $69.575, inclusive.

2. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $68.58 to $69.875, inclusive.

3. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $68.26 to $69.0852, inclusive.

Remarks:

	Anthony J. Steinriede, Attorney-in-Fact	08/12/2026
	** 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.
* Form 4: SEC 1474 (03-26)