Supplemental Prospectus (Form 424B3)

Filed pursuant to Rule 424(b)(3)

File No. 333-286556

Blue Owl Credit Income Corp.

Supplement No. 4 dated October 9, 2026

To

Prospectus dated April 20, 2026

This supplement contains information that amends, supplements or modifies certain information contained in the accompanying prospectus of Blue Owl Credit Income Corp. dated April 20, 2026, as amended and supplemented (the "Prospectus"), and is part of, and should be read in conjunction with, the Prospectus. The Prospectus has been filed with the U.S. Securities and Exchange Commission, and is available free of charge at www.sec.gov or by calling (212) 419-3000. Capitalized terms used in this supplement have the same meanings as in the Prospectus, unless otherwise stated herein.

Before investing in shares of our common stock, you should read carefully the Prospectus and this supplement and consider carefully our investment objective, risks, charges and expenses. You should also carefully consider the "Risk Factors" beginning on page 43 of the Prospectus before you decide to invest in our common stock.

UPDATES TO PROSPECTUS

The following paragraph is added to the "Suitability Standards" section of the Prospectus in appropriate alphabetical order:

Minnesota - In addition to the suitability standards set forth above, Minnesota investors may not invest more than 10% of their liquid net worth in us and our affiliates.

The following replaces the first paragraph in the "Risk Factors" section of the Prospectus:

Investing in our common stock involves a number of significant risks. The following information is a discussion of all known material risk factors associated with an investment in our common stock specifically, as well as those factors generally associated with an investment in a company with investment objectives, investment policies, capital structure or trading markets similar to ours. In addition to the other information contained in this prospectus, you should consider carefully the following information before making an investment in our common stock. The risks below are not the only risks we face. Additional risks and uncertainties not presently known to us or not presently deemed material by us may also impair our operations and performance. If any of the following events occur, our

business, financial condition and results of operations could be materially and adversely affected. In such cases, the net asset value of our common stock could decline, and you may lose all or part of your investment.

The following replaces the paragraph under "Our Bylaws include an exclusive forum selection provision, which could limit our shareholders' ability to obtain a favorable judicial forum for disputes with us or our directors, officers, or other agents" in the "Risk Factors" section of the Prospectus:

Our Bylaws require that, unless we consent in writing to the selection of an alternative forum, the Circuit Court for Baltimore City (or, if that court does not have jurisdiction, the United States District Court for the District of Maryland, Northern Division) shall be the sole and exclusive forum for (i) any derivative action or proceeding brought on our behalf (ii) any action asserting a claim of breach of any standard of conduct or legal duty owed by any of our directors, officers or other agents to us or to our shareholders, (iii) any action asserting a claim arising pursuant to any provision of the MGCL or the Charter or the Bylaws (as either may be amended from time to time), or (iv) any action asserting a claim governed by the internal affairs doctrine. This exclusive forum selection provision in our Bylaws will not apply to claims arising under the federal securities laws, including the Securities Act and the Exchange Act, or under the state securities laws. There is uncertainty as to whether a court would enforce such a provision, and investors cannot waive compliance with the federal securities laws and the rules and regulations thereunder. In addition, this provision may increase costs for shareholders in bringing a claim against us or our directors, officers or other agents. Any investor purchasing or otherwise acquiring our shares is deemed to have notice of and consented to the foregoing provision. The exclusive forum selection provision in our Bylaws may limit our shareholders' ability to obtain a favorable judicial forum for disputes with us or our directors, officers or other agents, which may discourage lawsuits against us and such persons. It is also possible that, notwithstanding such exclusive forum selection provision, a court could rule that such provision is inapplicable or unenforceable. If this occurred, we may incur additional costs associated with resolving such action in another forum, which could materially adversely affect our business, financial condition and results of operations.