8-K

UNITED STATESSECURITIES AND EXCHANGE COMMISSION****Washington, DC 20549

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FORM 8-K

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CURRENT REPORTPursuant to Section 13 or 15(d)of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported):October 30, 2025

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QUINSTREET, INC.(Exact name of registrant as specified in its charter)

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950 Tower Lane, 12th Floor

Foster City, CA

94404

(Address of principal executive offices andzip code)

Registrant’s telephone number, includingarea code: (650) 578-7700

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Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.07. Submission of Matters to a Vote of Security Holders.

QuinStreet, Inc. (the “Company”) held its 2025 Annual Meeting of Stockholders on October 30, 2025. Of the 57,446,367 shares of the Company’s common stock outstanding as of September 5, 2025 (the record date), 52,285,154 shares, or 91.02%, were present or represented by proxy at the meeting. Three proposals were considered at the meeting.

Proposal One. The stockholders elected the Company’s three Class I nominees to the Company’s Board of Directors for a three-year term expiring on the date of the 2028 annual meeting of stockholders or until their respective successors have been duly elected and qualified. The table below presents the results of the election:

Proposal Two. The stockholders ratified the appointment of PricewaterhouseCoopers LLP as the Company’s independent registered public accounting firm for the fiscal year ending June 30, 2026. The table below presents the voting results on this proposal:

Proposal Three. The stockholders approved, on a non-binding advisory basis, the compensation of the Company’s named executive officers, as disclosed in the Company’s 2025 Proxy Statement. The table below presents the voting results on this proposal:

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.