X0508 4 2025-10-30 0 0001117297 QUINSTREET, INC QNST 0001476267 Simons James R. 950 TOWER LANE, 12TH FLOOR FOSTER CITY CA 94404 1 0 0 0 0 Common Stock 2025-10-30 4 A 0 9938 0.0 A 75728 D Common Stock 44841 I by Trust Represents shares of common stock that are issuable pursuant to a Restricted Stock Unit (RSU) award. The vesting commencement date of the RSU award is October 30, 2025 and it vests daily over one year. Represents securities held directly by the James Rexroad Simons Trust, which the reporting person is the trustee. The reporting person disclaims beneficial ownership of the reported securities, except to the extent of any pecuniary interest therein. This report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. By: Gregory Wong For: James Simons 2025-11-03