MLI · Mueller Industries Inc

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.

On June 30, 2026, the Issuer effected a 2-for-1 stock split of its common stock in the form of a stock dividend, as a result of which the Reporting Person received an additional 40,867 shares of common stock.

The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $66.59 to $67.39, inclusive.

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.

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.

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.

Represents performance-based restricted stock, which may be earned between 0% and 200% of the target amount reported herein based upon the Issuer's actual performance as compared with an adjusted EBITDA target during the three-year period from December 28, 2025 through December 30, 2028. The vesting date is July 30, 2029.

On June 30, 2026, the Issuer effected a 2-for-1 stock split of its common stock in the form of a stock dividend, as a result of which the Reporting Person received an additional 804,911 shares of common stock.

Represents performance-based restricted stock, which may be earned between 0% and 200% of the target amount reported herein based upon the Issuer's actual performance as compared with an adjusted EBITDA target during the three-year period from December 28, 2025 through December 30, 2028. The vesting date is July 30, 2031.

On June 30, 2026, the Issuer effected a 2-for-1 stock split of its common stock in the form of a stock dividend, as a result of which the Reporting Person received an additional 131,018 shares of common stock.

Represents performance-based restricted stock, which may be earned between 0% and 200% of the target amount reported herein based upon the Issuer's actual performance as compared with an adjusted EBITDA target during the three-year period from December 28, 2025 through December 30, 2028. The vesting date is July 30, 2031.

On June 30, 2026, the Issuer effected a 2-for-1 stock split of its common stock in the form of a stock dividend, as a result of which the Reporting Person received an additional 42,458 shares of common stock.

Represents performance-based restricted stock, which may be earned between 0% and 200% of the target amount reported herein based upon the Issuer's actual performance as compared with an adjusted EBITDA target during the three-year period from December 28, 2025 through December 30, 2028. The vesting date is July 30, 2029.

On June 30, 2026, the Issuer effected a 2-for-1 stock split of its common stock in the form of a stock dividend, as a result of which the Reporting Person received an additional 305,358 shares of common stock.

On June 30, 2026, the Issuer effected a 2-for-1 stock split of its common stock in the form of a stock dividend, as a result of which the Reporting Person received an additional 15,000 shares of common stock.

On June 30, 2026, the Issuer effected a 2-for-1 stock split of its common stock in the form of a stock dividend, as a result of which the Reporting Person received an additional 91,886 shares of common stock.

These shares will vest on 7/30/2026.

These shares will vest on 7/30/2026.

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.

The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $137.00 to $138.135, inclusive.

Gift to a donor-advised fund

Gift to a donor-advised fund

The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $108.49 to $108.815, inclusive.

The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $102.65 to $104.13, inclusive.

The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $102.86 to $105.06, inclusive.

The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $102.88 to $105.00, inclusive.