SCHEDULE 13G 0000938206 XXXXXXXX LIVE Common Stock 03/31/2025 0001117297 Quinstreet, Inc. 74874Q100 950 Tower Lane, 6th Floor Foster City CA 94404 Rule 13d-1(b) DRIEHAUS CAPITAL MANAGEMENT LLC DE 0 3165649 0 3165649 3165649 N 5.61 IA Quinstreet, Inc. 950 Tower Lane, 6th Floor, Foster City, California, 94404 Driehaus Capital Management LLC 25 East Erie Street Chicago, Illinois 60611 USA N IA 3165649 5.61 0 3165649 0 3165649 Y N The shares reported by Driehaus Capital Management LLC (DCM) are held by numerous clients on a fully discretionary basis in accounts managed by DCM. Securities held in these clients' accounts are included in this report to reflect that DCM may have voting power and has dispositive power. To the best of DCM's knowledge, none of the referenced clients have the right to receive dividends or direct proceeds from the sale of interests relating to more than 5% of the class. Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. DRIEHAUS CAPITAL MANAGEMENT LLC Janet McWilliams 05/15/2025