Material Agreement (Form 8-K)

Item 1.01 Entry into a Material Definitive Agreement.

On October 3, 2025 (the "Closing Date"), Diameter Credit Company Holdings III LLC ("DCC Holdings"), a Delaware limited liability company and newly formed subsidiary of Diameter Credit Company (the "Company"), entered into a Credit and Security Agreement (the "DCC Holdings III Secured Credit Facility"), with DCC Holdings, as borrower, the Company, as portfolio manager and as UK retention provider, the lenders from time to time party thereto, Barclays Bank PLC, as administrative agent, Citibank, N.A., as collateral agent and as securities intermediary, and Siepe, LLC, as collateral administrator.

The maximum principal amount of the DCC Holdings III Secured Credit Facility as of the Closing Date is comprised of (a) subject to the borrowing base, which is determined on the basis of the value and types of DCC Holdings's assets from time to time, and satisfaction of certain conditions, including certain concentration limits, a revolving credit facility in the principal amount of $200 million and (b) a term loan in the principal amount of $50 million, which can be drawn in multiple currencies subject to certain conditions; Amounts drawn under the DCC Holdings III Secured Credit Facility initially bear interest at Term SOFR plus a margin of 2.05%; provided, that if the amount of each type of advance is less than the minimum utilization amount (i.e., (a) 100% for term advances and (b) with respect to certain periods following the Closing Date, 25% to 68.75% for revolving advances), then interest shall accrue on the total minimum utilization amount. Term advances that are repaid may not be reborrowed. The revolving period terminates on the date that is three years from the Closing Date and all amounts outstanding under the DCC Holdings III Secured Credit Facility must be repaid by the date that is ten years after the Closing Date. The contractual maturity date of the DCC Holdings III Secured Credit Facility is October 3, 2035.

The foregoing description of the DCC Holdings III Secured Credit Facility does not purport to be complete and is qualified in its entirety by reference to the full text of the DCC Holdings III Secured Credit Facility, filed as Exhibit 10.1 hereto and incorporated herein by reference.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits: