X0609 4 2026-05-14 0 0001122411 ASE Technology Holding Co., Ltd. ASX 0002111679 Chen Jeffrey true ROOM 1901, NO. 333 SECTION 1 KEELUNG RD. TAIPEI TAIWAN F5 110 TAIWAN 1 0 0 0 0 Ordinary Shares 2026-05-14 4 S 0 9000 560 D 74000 I By Spouse Ordinary Shares 2026-05-15 4 S 0 9000 563 D 65000 I By Spouse Ordinary Shares 2026-05-18 4 S 0 9000 506 D 56000 I By Spouse Ordinary Shares 2383000 D New Taiwan Dollars. The Reporting Person disclaims beneficial ownership over the securities reported except to the extent of his pecuniary interest therein, if any. /s/ Georgette Yeh, attorney-in-fact for Jeffrey Chen 2026-05-18