Capital World Investors Discloses New 5.1% Stake in Comcast Corp. (CMCSA)

On May 14, 2026, Capital World Investors (CWI) filed a Schedule 13G with the SEC, disclosing a 5.1% ownership stake in Comcast Corp. (CMCSA). The filing indicates that CWI beneficially owns 184,166,475 shares of Comcast's common stock. Of these shares, CWI holds sole voting power over 181,190,709 shares and sole dispositive power over the full 184,166,475 shares. Capital World Investors is a division of Capital Research and Management Company (CRMC) and operates alongside various investment management subsidiaries and affiliates. This filing represents a new significant position for the firm, as previous ownership was reported at 0.0%. The acquisition was made in the ordinary course of business, according to the filing certifications, and was not intended to influence or change the control of the issuer. The event triggering this filing occurred on March 31, 2026. This move establishes CWI as a major institutional shareholder in the telecommunications and media giant.