Oaktree Specialty Lending Corp — Earnings Release 2026

May 5, 2026

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): May 5, 2026

Oaktree Specialty Lending Corporation

(Exact name of registrant as specified in its charter)

Delaware	814-00755	26-1219283
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification No.)

333 South Grand Avenue , 28th Floor Los Angeles , CA	90071
(Address of principal executive offices)	(Zip Code)

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:

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

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

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

☐ 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(s)	Name of each exchange on which registered
Common stock, par value $0.01 per share	OCSL	The Nasdaq Stock Market LLC

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 2.02. Results of Operations and Financial Condition.

On May 5, 2026, Oaktree Specialty Lending Corporation (the “Company”) issued a press release announcing its financial results for the fiscal quarter ended March 31, 2026. A copy of the press release is attached hereto as Exhibit 99.1.

On May 5, 2026, the Company will host a conference call to discuss its financial results for the fiscal quarter ended March 31, 2026. In connection therewith, the Company provided an investor presentation on its website at http://www.oaktreespecialtylending.com. A copy of the investor presentation is attached hereto as Exhibit 99.2.

The information disclosed under this Item 2.02, including Exhibits 99.1 and 99.2 hereto, is being “furnished” and is not deemed “filed” by the Company for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section, nor is it deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits

99.1	Press release of Oaktree Specialty Lending Corporation dated May 5, 2026
99.2	Oaktree Specialty Lending Corporation Second Quarter 2026 Earnings Presentation
104	Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURE

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

/s/ Christopher McKown
Name: Christopher McKown Title: Chief Financial Officer and Treasurer