144 0001917389 XXXXXXXX LIVE 0001528396 Guidewire Software, Inc. 001-35394 970 Park Pl, Suite 200 San Mateo CA 94403 650-357-9100 John P Mullen President Common Stock Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 38th Floor New York NY 10004 39683 5733074.89 81992669 09/17/2026 NYSE Common 09/15/2026 Vesting of RSU (Grant Date: 09/15/2022) Issuer N 1506 09/15/2026 N/A (acquired as compensation) Common 09/15/2026 Vesting of PSU (Grant Date: 09/13/2023) Issuer N 75211 09/15/2026 N/A (acquired as compensation) Common 09/15/2026 Vesting of RSU (Grant Date: 09/13/2023) Issuer N 1992 09/15/2026 N/A (acquired as compensation) Common 09/15/2026 Vesting of RSU (Grant Date: 09/11/2024) Issuer N 1557 09/15/2026 N/A (acquired as compensation) Common 09/15/2026 Vesting of RSU (Grant Date: 09/11/2024) Issuer N 3322 09/15/2026 N/A (acquired as compensation) Common 09/15/2026 Vesting of RSU (Grant Date: 09/11/2025) Issuer N 987 09/15/2026 N/A (acquired as compensation) N John P. Mullen c/o Guidewire Software, Inc. 970 Park Pl, Suite 200 San Mateo CA 94403 Common Stock 08/25/2026 1800 339228 John P. Mullen c/o Guidewire Software, Inc. 970 Park Pl, Suite 200 San Mateo CA 94403 Common Stock 08/19/2026 16200 2997000 The amounts listed under 'Number of Shares to be Sold' reflect automatic sell-to-cover transactions to satisfy tax withholding obligations under the Issuer's Amended and Restated 2020 Stock Plan, representing a portion of the full RSU and PSU vests on September 15, 2026. 09/17/2026 /s/ John P. Mullen