Supplemental Prospectus (Form 424B3)

Filed Pursuant to Rule 424(b)(3)

Registration No. 333-286709

ARES STRATEGIC INCOME FUND

SUPPLEMENT NO. 13 DATED OCTOBER 27, 2026

TO THE PROSPECTUS DATED APRIL 24, 2026

This prospectus supplement ("Supplement") contains information that amends, supplements or modifies certain information contained in the accompanying prospectus of Ares Strategic Income Fund, dated April 24, 2026 (as amended and supplemented to date, the "Prospectus"). This Supplement is part of and should be read in conjunction with the Prospectus. Unless otherwise indicated, all other information included in the Prospectus, or any previous supplements thereto, that is not inconsistent with the information set forth in this Supplement remains unchanged. Unless otherwise defined herein, capitalized terms used in this Supplement shall have the same meanings as in the Prospectus.

Effective immediately, the Prospectus is updated to include the Current Report on Form 8-K filed with the Securities and Exchange Commission on October 27, 2026 (the "Form 8-K"). The Form 8-K is attached to this Supplement as Appendix A.

Appendix A

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

_____________________________________________________________________

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of report (Date of earliest event reported) October 22, 2026

ARES STRATEGIC INCOME FUND

(Exact Name of Registrant as Specified in Charter)

Delaware

814-01512

88-6432468

(State or Other Jurisdiction of Incorporation)

(Commission File Number)

(IRS Employer Identification No.)

245 Park Avenue, 44th Floor, New York, NY						10167
(Address of Principal Executive Offices)						(Zip Code)

Registrant's telephone number, including area code (212) 750-7300

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class			Trading symbol			Name of each exchange on which registered

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company o

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 5.02 Departure of Directors or Principal Officers; Election of Directors; Appointment of Principal Officers.

On October 22, 2026, Paul Cho informed the board of trustees of Ares Strategic Income Fund (the "Fund") of his intention to step down from his position as Chief Accounting Officer and Principal Accounting Officer, effective October 31, 2026. Paul Cho will continue to serve within the finance and accounting function of Ares Management Corporation. Paul Cho's decision to step down was not based on the result of any disagreement regarding the Fund's operations, policies or practices.

Effective October 31, 2026, Scott Lem, the Fund's Chief Financial Officer and Treasurer, will also serve as the Fund's Principal Accounting Officer for purposes of the Fund's filings with the Securities and Exchange Commission.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

						ARES STRATEGIC INCOME FUND
Date: October 27, 2026
			By:			/s/ SCOTT C. LEM
			Name:			Scott C. Lem
			Title:			Chief Financial Officer and Treasurer

Please retain this Supplement with your Prospectus.