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): August 26, 2020

Blackstone / GSO Secured Lending Fund

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (212) 503-2100

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:

Securities registered pursuant to Section 12(b) of the Act: None

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 or Rule 12b–2 of the Securities Exchange Act of 1934.

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.  ☐

Effective August 26, 2020, the board of trustees (the “Board”) of Blackstone / GSO Secured Lending Fund (the “Company”) appointed Vicki L. Fuller to the Board and as a member of the Board’s Audit Committee and Nominating and Governance Committee. Ms. Fuller’s appointment brings the total number of trustees on the Board to seven, four of whom are not “interested persons” of the Company as defined in Section 2(a)(19) of the Investment Company Act of 1940, as amended.

Ms. Fuller has served as a director of The Williams Companies, Inc. since 2018. Ms. Fuller joined the board of The Williams Companies, Inc. after retirement from the New York State Common Retirement Fund (“NYSCRF”) where she served as Chief Investment Officer beginning in August 2012. NYSCRF is the third largest public pension fund in the nation and holds and invests the assets of the New York State and Local Retirement System on behalf of more than one million state and local government employees and retirees and their beneficiaries. Prior to joining NYSCRF, Ms. Fuller spent 27 years in leadership positions at AllianceBernstein Holding L.P., which has approximately $500 billion in assets under management. She joined the company in 1993 from the Equitable Capital Management Corporation, which was acquired by Alliance Capital Management LP (in 2000, the company became AllianceBernstein LP after the company acquired Sanford C. Bernstein). In December 2019, Ms. Fuller was appointed to the board of directors of Treliant, LLC, an international multi-industry consulting firm specializing in regulatory requirements. In 2018, Ms. Fuller was appointed to the Board of Trustees for Fidelity Equity and High Income Funds. Ms. Fuller, who was inducted into the National Association of Securities Professionals Wall Street Hall of Fame, was named to Chief Investment Officer Magazine’s “Power 100” and received the Urban Technology Center’s Corporate Leadership Award. She has also been named one of the most powerful African Americans on Wall Street by Black Enterprise.

Ms. Fuller has not been elected to serve as a trustee pursuant to any agreement or understanding with the Company or any other person and there are no transactions in which Ms. Fuller has an interest requiring disclosure under Item 404(a) of Regulation S-K. Ms. Fuller will receive the standard compensation paid by the Company to its trustees that are not “interested persons.”

(d) 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.