X0609 4 2026-09-28 0 0001692115 Southwest Gas Holdings, Inc. SWX 0001932678 Williams Julie M. false 8360 S. DURANGO DR. LAS VEGAS NV 89113 0 1 0 0 SVP/Cont. Improvement and Opt. 0 Common Stock 2026-09-28 4 S 0 2500 81.8074 D 26449.801 D Common Stock 2485.076 I By 401(k) The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $81.80 to $81.86, inclusive. The reporting person undertakes to provide to Southwest Gas Holdings Inc., any security holder of Southwest Gas Holdings, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4. Catherine M. Mazzeo, POA 2026-09-29