UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 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): July 19, 2018 (July 18, 2018)

Oaktree Strategic Income Corporation

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (213) 830-6300

Not Applicable

(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:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

Emerging Growth Company  ☒

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. ☒

Item 1.01. Entry into a Material Definitive Agreement.

On July 18, 2018, Oaktree Strategic Income Corporation (the “Company”) entered into the Second Amendment (the “Amendment”) to the Amended and Restated Loan and Security Agreement with OCSI Senior Funding II LLC, the Company’s wholly-owned, special purpose financing subsidiary, as the borrower, and Citibank, N.A., as administrative agent and sole lender (as amended, the “Citibank Facility”). The Amendment increased the maximum permissible borrowings under the Citibank Facility from $100 million to $180 million. In addition, the Amendment extended the expiration of the reinvestment period from January 30, 2021 to July 19, 2021 and the maturity date from January 31, 2023 to July 18, 2023. The non-usage fee is increased pursuant to a formula if, after the ramp up period extended by the Amendment, the advances outstanding under the Citibank Facility do not exceed 70% of the aggregate commitments by lenders. The other material terms of the Citibank Facility were unchanged.

The foregoing description of the Amendment is qualified in its entirety by reference to the complete text of the Amendment, a copy of which is attached as Exhibit 10.1 to this Current Report on Form 8-K and is incorporated herein by reference.

Item 9.01. Financial Statements and Exhibits.

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.