Material Agreement (Form 8-K)

Item 1.01. Entry into a Material Definitive Agreement.

On March 12, 2026 (the "Second Amendment Date"), Grouse Funding LLC ("Grouse Funding"), a wholly owned subsidiary of Apollo Debt Solutions BDC, a Delaware statutory trust (the "Company") entered into the Second Amendment (the "Grouse Second Credit Facility Amendment") to its Credit Agreement (the "Grouse Secured Credit Facility"), dated as of July 7, 2022, by and among Grouse Funding, as borrower, the Company, as investment manager and as guarantor, the lenders from time to time party thereto, Goldman Sachs Bank USA, as syndication agent and administrative agent, State Street Bank and Trust Company, as collateral custodian and collateral agent, and Virtus Group, LP, as collateral administrator.

The Grouse Second Credit Facility Amendment amends the Grouse Secured Credit Facility to, among other things, (i) increase the maximum facility amount from $500,000,000 to $1,000,000,000, (ii) extend the reinvestment period from January 30, 2028 to the date that is three years after the Second Amendment Date, and (iii) extend the maturity period from January 30, 2030 to the date that is five years after the Second Amendment Date.

The description above is only a summary of the material provisions of the Grouse Second Credit Facility Amendment and is qualified in its entirety by reference to a copy of the form of Grouse Second Credit Facility Amendment, which is filed as Exhibit 10.1 to this current report on Form 8-Kand is incorporated herein by reference.