Dimensional Fund Advisors LP Reports 6.3% Stake in MGIC Investment Corp (MTG)

Dimensional Fund Advisors LP filed a Schedule 13G/A on April 9, 2026, disclosing a 6.3% ownership stake in MGIC Investment Corp (MTG). As of the event date on March 31, 2026, the firm reported beneficial ownership of 13,654,046 shares of Common Stock. This represents a significant increase from the previously reported 0.0% position, indicating a new substantial holding or a return to a reporting threshold above 5%. Dimensional Fund Advisors LP serves as an investment adviser to various registered investment companies, trusts, and separate accounts. While the firm may be deemed a beneficial owner due to its voting and investment power, it expressly disclaims beneficial ownership of these securities, noting that the shares are owned by the underlying Funds. Of the total shares held, the filer maintains sole voting power over 13,460,722 shares and sole dispositive power over all 13,654,046 shares. The filing indicates the securities were acquired in the ordinary course of business and not for the purpose of influencing control over the issuer.