X0508 4 2025-11-19 0000861842 CATHAY GENERAL BANCORP CATY 0001185628 CHENG DUNSON K 777 NORTH BROADWAY LOS ANGELES CA 90012 1 1 Executive Chairman 0 Common Stock 384577 I Husband & Wife Trust Common Stock 182452 I Nonmarital Share Trust Common Stock 102889 I By ESOP Common Stock 2025-11-19 4 S 0 1000 45.7501 D 169950 D Common Stock 2025-11-20 4 S 0 14000 46.2439 D 155950 D Common Stock 2025-11-21 4 S 0 10000 47.8524 D 145950 D The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $45.90 to $46.66, inclusive. The reporting person undertakes to provide to Cathay General Bancorp ("Cathay"), any security holder of Cathay, 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 range set forth in this footnote. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $47.075 to $48.26, inclusive. The reporting person undertakes to provide to Cathay General Bancorp ("Cathay"), any security holder of Cathay, 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 range set forth in this footnote. /s/ Georgia Lo, attorney-in-fact 2025-11-21