Golub Capital Private Income Fund S Amends Credit Facility Side Letter

What Happened

• Golub Capital Private Income Fund S (the “Company”) disclosed that its wholly owned subsidiary GPIF S Funding (the “Funding”) entered into a second amended and restated side letter to the revolving credit and security agreement with Bank of America, N.A. on June 23, 2026.
• The side letter modifies the minimum utilization level used to calculate the unused commitment fee under the BANA Credit Facility (the facility was previously amended and restated on December 31, 2025). The side letter is filed as Exhibit 10.1 to the 8-K.

Key Details

• Date of amendment: June 23, 2026.
• Parties: GPIF S Funding (borrower), Golub Capital Private Income Fund S (servicer), Bank of America, N.A. (administrative agent and sole lender), Computershare Trust Company, N.A. (collateral custodian).
• Change: modifies the minimum utilization level for calculating the unused commitment fee.
• Effective period noted in the filing: through September 30, 2026.

Why It Matters

• This change affects how the unused commitment fee (the fee paid on undrawn portions of the credit line) is calculated through September 30, 2026, which can influence the Company’s short-term borrowing costs and the economics of keeping the credit line available.
• Investors should note the amendment as a contractual change to the Company’s liquidity arrangements; the full terms and potential fee impact are in the side letter attached as Exhibit 10.1.