Certification Pursuant to Rule 30a-2(b) under the 1940 Act and Section 906 of the
Sarbanes-Oxley Act
I, George Mueller, President and Chief Executive Officer of KKR US Direct Lending Fund-U Inc. (the “Registrant”), certify that:
| 1. | The Form N-CSR of the Registrant (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and |
| 2. | The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant. |
| Date: September 2, 2026 | /s/ George Mueller | |
| George Mueller, President and Chief Executive Officer | ||
| (principal executive officer) |
I, Thomas Murphy, Chief Financial Officer, Chief Accounting Officer and Treasurer of KKR US Direct Lending Fund-U Inc.. (the “Registrant”), certify that:
| 1. | The Form N-CSR of the Registrant (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and |
| 2. | The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant. |
| Date: September 2, 2026 | /s/ Thomas Murphy | |
| Thomas Murphy, Chief Financial Officer, Chief Accounting Officer and Treasurer | ||
| (principal financial officer) |