SCHEDULE 13G/A 0000950170-25-108003 0001535845 XXXXXXXX LIVE 1 Class A ordinary shares, $0.0001 par value 09/30/2025 0001986817 Gores Holdings X, Inc. G4002F109 6260 Lookout Rd Boulder CO 80301 Rule 13d-1(b) Healthcare of Ontario Pension Plan Trust Fund 950443 0 950443 0 950443 N 2.6 FI In reference to Rows 5, 7 and 9 above, amount consists of Class A ordinary shares, $0.0001 par value ("Class A Shares"), of Gores Holdings X, Inc., a blank check company formed under the laws of the Cayman Islands (the "Issuer"). In reference to Row 11 above, percentage ownership is based on 36,105,000 Class A Shares issued and outstanding as of August 12, 2025, as reported on the Issuer's quarterly report on Form 10-Q for the quarter ended on June 30, 2025, filed with the Securities and Exchange Commission on August 13, 2025. Gores Holdings X, Inc. 6260 Lookout Rd., Boulder, CO, 80301 Healthcare of Ontario Pension Plan Trust Fund ("HOOPP") 1 York Street, Suite 1900, Toronto, Ontario, Canada, M5J 0B6 Ontario, Canada N FI A pension plan formed as a trust under the laws of Ontario, Canada and registered with the Financial Services Regulatory Authority of Ontario. See Item 9 on page 2. See Item 11 on page 2. See Item 5 on page 2. See Item 6 on page 2. See Item 7 on page 2. See Item 8 on page 2. N Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above 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 of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. By signing below I certify that, to the best of my knowledge and belief, the regulatory scheme applicable to a pension plan formed as a trust under the laws of Ontario, Canada and registered with the Financial Services Regulatory Authority of Ontario is substantially comparable to the regulatory scheme applicable to the functionally equivalent U.S. institution(s). I also undertake to furnish to the Securities and Exchange Commission staff, upon request, information that would otherwise be disclosed in a Schedule 13D. Healthcare of Ontario Pension Plan Trust Fund /s/ Abas Kanu 11/13/2025