0001117297 2026-01-02 2026-01-02 true 0001117297 8-K/A 2026-01-02 QUINSTREET, INC. DE 001-34628 77-0512121 950 Tower Lane 12th Floor Foster City CA 94404 650 578-7700 false false false false Common Stock, par value $0.001 per share QNST NASDAQ false This Amendment No. 1 to Form 8-K is filed by QuinStreet, Inc., a Delaware corporation (the “Company”), to provide the financial statements required by Item 9.01(a)(1) and the pro forma financial information required by Item 9.01(b)(1) of Form 8-K related to the completion of the acquisition of SIREN GROUP AG d/b/a HomeBuddy, a company limited by shares organized under the laws of Switzerland (“HomeBuddy”), previously reported in the Current Report on Form 8-K (File No. 001-34628) filed with the Securities and Exchange Commission on January 2, 2026. The pro forma financial information gives effect to certain pro forma events related to the acquisition and has been presented for informational purposes only. It does not purport to project the future financial position or operating results of the Company following the acquisition.