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): December 18, 2018 (December 12, 2018)

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:

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.  ☐

Item 1.01. Entry into a Material Definitive Agreement.

Expense Support Agreement

On December 12, 2018, Blackstone / GSO Secured Lending Fund (the “Company”) entered into an expense support and conditional reimbursement agreement (the “Expense Support Agreement”) with GSO Asset Management LLC, the Company’s investment adviser (the “Adviser”).

The Expense Support Agreement provides that, at such times as the Adviser determines, the Adviser may pay certain expenses of the Company, provided that no portion of the payment will be used to pay any interest expense of the Company (each, an “Expense Payment”). Such Expense Payment will be made in any combination of cash or other immediately available funds no later than forty-five days after a written commitment from the Adviser to pay such expense, and/or by an offset against amounts due from the Company to the Adviser or its affiliates. Following any calendar quarter in which Available Operating Funds (as defined in the Expense Support Agreement) exceed the cumulative distributions accrued to the Company’s shareholders based on distributions declared with respect to record dates occurring in such calendar quarter (such amount referred to as the “Excess Operating Funds”), the Company shall pay such Excess Operating Funds, or a portion thereof (each, a “Reimbursement Payment”), to the Adviser until such time as all Expense Payments made by the Adviser to the Company within three years prior to the last business day of such calendar quarter have been reimbursed. The amount of the Reimbursement Payment for any calendar quarter shall equal the lesser of (i) the Excess Operating Funds in such quarter and (ii) the aggregate amount of all Expense Payments made by the Adviser to the Company within three years prior to the last business day of such calendar quarter that have not been previously reimbursed by the Company to the Adviser. The Expense Support Agreement provides additional restrictions on the amount of each Reimbursement Payment for any calendar quarter. The Adviser may waive its right to receive all or a portion of any Reimbursement Payment in any particular calendar quarter, so that such Reimbursement Payment may be reimbursable in a future calendar quarter.

The foregoing description is only a summary of the material provisions of the Expense Support Agreement and is qualified in its entirety by reference to a copy of the Expense Support Agreement, which is filed as Exhibit 10.1 to this Current Report on Form 8-K and incorporated by reference herein.

Amended and Restated Dividend Reinvestment Plan

On December 12, 2018, the Board approved and adopted an Amended and Restated Dividend Reinvestment Plan (the “Plan”) applicable to common shares of beneficial interest (the “Shares”) of the Company, pursuant to which the Company will reinvest all cash dividends declared by the Board on behalf of each holder of Shares (a “Shareholder”) who do not elect to receive their dividends in cash.

Pursuant to the amendment and restatement, prior to an Exchange Listing (as defined in the Plan), a participating Shareholder will receive an amount of Shares equal to the amount of the distribution on that participant’s Shares divided by the most recent fiscal quarter-end net asset value (“NAV”) per Share that is available on the date such distribution was paid (unless the Board determines to use the NAV per Share as of another time).

The foregoing description is only a summary of the material provisions of the Plan and is qualified in its entirety by reference to a copy of the Plan, which is filed as Exhibit 10.2 to this Current Report on Form 8-K and incorporated by reference herein.

Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On December 12, 2018, Dohyun (Doris) Lee-Silvestri resigned as Chief Financial Officer and Treasurer of the Company, effective as of December 12, 2018.

On December 12, 2018, the Company’s board of trustees (the “Board”) appointed Stephan Kuppenheimer, age 48, as Chief Financial Officer of the Company and Robert Busch, age 36, as Chief Accounting Officer and Treasurer of the Company. At that time, the Board also selected Mr. Kuppenheimer as the principal financial officer of the Company and Mr. Busch as the principal accounting officer of the Company, in each case effective as of December 12, 2018.

Mr. Kuppenheimer is a Managing Director with GSO Capital Partners LP (“GSO”), the Company’s administrator and an affiliate of the Company’s Adviser, responsible for capital markets, including the financing of GSO’s funds and investments as well as the syndication of certain portfolio holdings. Mr. Kuppenheimer is also a member of the investment committee for certain U.S. direct lending funds. Mr. Kuppenheimer joined GSO in 2015. Before joining GSO in 2015, he was a Senior Managing Director at Stifel Financial where he served as Head of Principal Investing and Head of Debt Capital Markets from 2010 to 2015. In addition, as part of his responsibilities at Stifel, Mr. Kuppenheimer served as a member of the board of directors of CM Finance Inc. (a publicly listed BDC). Prior to Stifel, Mr. Kuppenheimer was founder and CEO of FSI Capital, an alternative asset management company focused on U.S. credit products. Previously, Mr. Kuppenheimer was head of CLOs, structured funds and new products for Merrill Lynch. Mr. Kuppenheimer received a J.D., with Distinction, from Emory University School of Law and a B.A. from Colgate University with Honors in Philosophy.

Mr. Busch is a Senior Vice President with GSO. Mr. Busch joined GSO in 2018. Mr. Busch worked previously at Fifth Street Asset Management from 2012 to 2018, where he was Senior Vice President Finance and served as Controller of the firm’s two publicly traded business development companies and publicly traded alternative asset manager. Prior to that, Mr. Busch was an Audit Manager at Deloitte & Touche LLP serving clients in various industries including alternative asset management and real estate. Mr. Busch is a Certified Public Accountant in the state of New York and received a Bachelor’s Degree in Business Administration with a concentration in Accounting from Boston University’s Questrom School of Business where he graduated cum laude.

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.