Schroder Investment Management Group and its U.S. affiliate filed a Schedule 13G with the SEC on November 12, 2026, disclosing beneficial ownership of 542,414 Class A shares of HMH Holding Inc as of September 30, 2026.

Key Highlights

  • Aggregate beneficial ownership: 542,414 Class A shares of HMH Holding Inc (CUSIP 40445M100), representing 4.5% of the class, according to the filing.
  • Sole voting and dispositive power: Both reporting persons each reported sole power to vote and dispose of all 542,414 shares, with zero shared voting or dispositive power.
  • Two reporting persons: The filing covers Schroder Investment Management Group, organized in the United Kingdom, and Schroder Investment Management North America Inc., organized in the United States, both classified as investment advisers (type "IA").
  • Triggering date: The event requiring the filing occurred on September 30, 2026, as stated in the filing.
  • Ownership threshold: The filing was made under Item 5, "Ownership of 5 Percent or Less of a Class," consistent with the reported 4.5% figure.
  • Signed by: Thomas Darnowski, CEO, Americas, signing on behalf of both reporting persons under a Power of Attorney, dated November 12, 2026.

Schroder Investment Management Group's Schedule 13G Filing for HMH Holding Class A Shares

According to the Schedule 13G filed November 12, 2026, Schroder Investment Management Group, headquartered at London Wall Place, London, EC2Y 5AU, United Kingdom, and its affiliate Schroder Investment Management North America Inc. each reported beneficial ownership of 542,414 Class A shares of HMH Holding Inc. The issuer's principal executive offices are listed in the filing as 3300 North Sam Houston Parkway East, Houston, Texas 77032. The filing does not name a stock exchange or ticker symbol for HMH Holding Inc.

Both reporting persons are classified as investment advisers. Each entity independently reported sole voting power over 542,414 shares and sole dispositive power over the same number of shares, with no shared voting or shared dispositive power reported by either. The aggregate amount beneficially owned by each reporting person is stated as 542,414 shares, equal to 4.5% of the class. The filing certifies, as required, that the securities "were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer."

Thomas Darnowski, identified as CEO, Americas, signed the filing on behalf of both Schroder Investment Management Group and Schroder Investment Management North America Inc. on November 12, 2026, with a notation that he acted under Power of Attorney. The filing states that Items 6, 7, 8, and 9 are "Not Applicable," indicating no ownership on behalf of another person, no subsidiary acquisition, no group membership, and no group dissolution to report.

What Was Disclosed

Schroder Investment Management Group and Schroder Investment Management North America Inc. disclosed a combined beneficial ownership position of 542,414 Class A shares of HMH Holding Inc, representing 4.5% of the class, as of September 30, 2026, filed on November 12, 2026.