Capital World Investors Acquires 6.2% Stake in Core & Main, Inc. (CNM)

On May 14, 2026, Capital World Investors (CWI) filed a Schedule 13G with the SEC, reporting a new 6.2% ownership stake in Core & Main, Inc. (CNM). As of the event date on March 31, 2026, CWI beneficially owns 11,571,392 shares of common stock. CWI, a division of Capital Research and Management Company (CRMC), holds sole voting and dispositive power over the entirety of these shares. This filing represents a significant increase from a previous position of zero, marking a new substantial holding by the investment advisor. The filing indicates that the shares were acquired in the ordinary course of business and not for the purpose of influencing or changing the control of the issuer. The total shares outstanding for Core & Main, Inc. used for this calculation was approximately 188,072,306. This transaction underscores a major institutional investment in the St. Louis-based company by one of the world's largest investment management organizations.