CNM · Core & Main, Inc.

ST. LOUIS, February 16, 2026— Core & Main, Inc. (NYSE: CNM), a leading specialty distributor dedicated to advancing reliable infrastructure with local service, nationwide, today announced the opening of its new facility located in Belleville, Ontario, Canada. The new location allows the company to further expand its footprint and better serve waterworks customers in the region. This step in the growth strategy of Core & Main builds on the commitment to make its products and expertise more accessible. About Core & Main Based in St. Louis, Missouri, Core & Main is a leader in advancing reliable infrastructure® with local service, nationwide®. As a specialty distributor with a focus on water, wastewater, storm drainage and fire protection products and related services, Core & Main provides solutions to municipalities, private water companies and professional contractors across municipal, non-residential and residential end markets in the United States

ST. LOUIS, February 2, 2026— Core & Main, Inc. (NYSE: CNM), a leading specialty distributor dedicated to advancing reliable infrastructure with local service, nationwide, today announced the opening of its new facility located in Columbus, Ohio. The new location, dedicated to fire protection fabrication, products and services, allows the company to further expand its footprint and better serve customers in the region. This step in Core & Main’s growth strategy builds on the commitment to make its products and expertise more accessible nationwide. About Core & Main Based in St. Louis, Core & Main is a leader in advancing reliable infrastructure® with local service, nationwide®. As a specialty distributor with a focus on water, wastewater, storm drainage and fire protection products and related services, Core & Main provides solutions to municipalities, private water companies and professional contractors across municipal, non-residential and

Core & Main Inc. (NYSE: CNM), a leader in advancing reliable infrastructure with local service, nationwide, has closed its previously announced acquisition of Pioneer Supply, a distributor of water, wastewater and storm drainage products with locations in Moore, Oklahoma, and Weatherford, Texas. About Core & Main Based in St. Louis, Core & Main is a leader in advancing reliable infrastructure® with local service, nationwide®. As a specialty distributor with a focus on water, wastewater, storm drainage and fire protection products and related services, Core & Main provides solutions to municipalities, private water companies and professional contractors across municipal, non-residential and residential end markets. With more than 370 locations across the U.S., the company provides its customers local expertise backed by a national supply chain. The 5,700 associates at Core & Main are committed to helping their communities thrive with safe and reliable

Core & Main Inc. (NYSE: CNM), a leader in advancing reliable infrastructure with local service, nationwide, has entered into a definitive agreement to acquire Pioneer Supply, a distributor of water, wastewater and storm drainage products with locations in Moore, Oklahoma, and Weatherford, Texas. “Pioneer Supply represents a wonderful opportunity to expand our presence in Texas and Oklahoma,” said Brad Cowles, president of Core & Main. “Their strong reputation for quality and service perfectly complements our mission to deliver exceptional value to our customers. Together, we will be able to expand our reach and create even greater opportunities for growth and success.” Established in 1963, Pioneer Supply supports customers across the municipal, residential, and non-residential end-markets. “Pioneer Supply is proud to join the Core & Main family, given our companies’ shared focus on culture and supplying the best products and expertise to