On December 28, 2021, Southwest Gas Holdings, Inc. entered into Amendment No. 1 (Holdco Agreement Amendment No. 1) to the Amended and Restated Revolving Credit Agreement, dated as of April 10, 2020, with the lenders party thereto, and The Bank of New York Mellon, as Administrative Agent, which, after giving effect to Holdco Agreement Amendment No. 1, provides for up to $200 million in revolving borrowing capacity. As of December 28, 2021, $59 million in aggregate principal amount was outstanding under the Southwest Gas Holdings, Inc. credit facility. Holdco Agreement Amendment No. 1, among other things, extends the maturity date of the credit facility to December 28, 2026, increases the total commitment amount by $100 million to $200 million, increases the amount to which the total commitment may be increased from $200 million to $300 million, and replaces London Interbank Offered Rate (LIBOR) interest rate benchmarks with Secured Overnight Financing Rate (SOFR) interest rate benchmarks.