MUELLER INDUSTRIES INC

The Company is exposed to risk as it operates its businesses. To provide a framework to understand the operating environment of the Company, we have provided a brief explanation of the more significant risks associated with our businesses in our 2024 Annual Report on Form 10-K. Except as set forth below, there have been no material changes in risk factors that were previously disclosed in our 2024 Annual Report on Form 10-K. Additionally, the operating results of the Company’s unconsolidated affiliates may be adversely affected by unfavorable economic and market conditions.

Enhanced U.S. tariffs, import/export restrictions or other trade barriers may have a negative effect on global economic conditions, financial markets and our business.

There is currently significant uncertainty about the future relationship between the U.S. and various other countries with respect to trade policies, treaties, tariffs and taxes. Current or future tariffs imposed by the U.S. may negatively impact our customers’ businesses, thereby causing an indirect negative impact on our sales. For example, in early 2025, the U.S. presidential administration threatened or imposed tariffs on imports from various countries, including China, Mexico, and Canada. In response, some of these countries threatened or announced tariffs on imports from the U.S. The extent to which these threats will be enacted and the duration for which enacted tariffs will be in place remain uncertain and could lead to economic decline, which could negatively impact demand for our products and adversely affect our results of operations.