Steffen Sigloch - 12 May 2025 Form 4/A - Amendment Insider Report for MUELLER INDUSTRIES INC (MLI)

Role: Chief Manufacturing Officer
Signature: Anthony J. Steinriede, Attorney-in-Fact
Issuer symbol: MLI
Transactions as of: 12 May 2025
Net transactions value: -$1,521,128
Form type: 4/A - Amendment
Filing time: 14 May 2025, 17:28:25 UTC
Date Of Original Report: 14 May 2025
Previous filing: 07 Apr 2025
Next filing: 02 Jul 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Sigloch Steffen	Chief Manufacturing Officer	3205 BLUE CYPRESS LN, WELLINGTON	Anthony J. Steinriede, Attorney-in-Fact	14 May 2025	0001549986

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MLI	Common Stock	Sale	$1,521,128	-19,584	-12%	$77.67	139,960	12 May 2025	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

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).

Explanation of Responses:

Id	Content
F1	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.
F2	The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $77.50 to $78.57, inclusive.