QUINSTREET, INC

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and our Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures as of June 30, 2026. The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), means controls and other procedures of a company that are designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the company’s management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure. Management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures. In January 2026, we completed the acquisition of HomeBuddy as disclosed in Note 6 to the consolidated financial statements. We accounted for this acquisition as a business combination. The scope of management’s assessment of the effectiveness of the Company’s disclosure controls and procedures did not include the internal controls over financial reporting of HomeBuddy. This exclusion is in accordance with the SEC staff’s general guidance that an assessment of a recently acquired business may be omitted from the scope of management’s assessment for one year following the acquisition. The recognition of goodwill and intangible assets, however, is covered by our internal controls over mergers and acquisitions, which were included in management’s assessment of the effectiveness of the Company’s internal control over financial reporting as of June 30, 2026. Based on the evaluation of our disclosure controls and procedures as of June 30, 2026, our Chief Executive Officer and Chief Financial Officer concluded that, as of such date, our disclosures and procedures were effective at the reasonable assurance level.

Management’s Report on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act. Our internal control over financial reporting is designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of consolidated financial statements for external purposes in accordance with generally accepted accounting principles. Our internal control over financial reporting includes those policies and procedures that:

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pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of its assets,

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provide reasonable assurance that transactions are recorded as necessary to permit preparation of consolidated financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures are being made only in accordance with authorizations of our management and directors, and

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provide reasonable assurance regarding prevention or timely detection of any unauthorized acquisition, use or disposition of our assets that could have a material effect on the consolidated financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of internal control effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Our management has assessed the effectiveness of the internal control over financial reporting as of June 30, 2026. In making this assessment, our management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”) in Internal Control — Integrated Framework (2013 Framework). Based on this evaluation, our management has concluded that our internal control over financial reporting was effective as of June 30, 2026.

Our management has excluded the internal control over financial reporting (ICFR) of HomeBuddy from its assessment. Revenues attributable to HomeBuddy represented approximately 6.9% of the Company's consolidated revenues for the fiscal year ended June 30,

2026. Assets attributable to HomeBuddy represented approximately 5.5% of the Company's consolidated total assets as of June 30, 2026. Under guidelines established by the SEC, companies are permitted to exclude acquisitions from their assessment of ICFR for a period of up to one year following an acquisition while integrating the acquired company.

The effectiveness of our internal control over financial reporting as of June 30, 2026 has been audited by PricewaterhouseCoopers LLP, an independent registered public accounting firm, as stated in their report which appears in this annual report on Form 10-K.

Changes in Internal Control over Financial Reporting

Except as noted above with respect to the acquisition of HomeBuddy, there was no change in our internal control over financial reporting identified in connection with the evaluation required by Rule 13a-15(d) and 15d-15(d) of the Exchange Act that occurred during the three months ended June 30, 2026 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.