SEC Form 424B3 filed by Kazia Therapeutics Limited

Filed Pursuant to Rule 424(b)(3)

Registration No. 333-276774

PROSPECTUS SUPPLEMENT

(to Prospectus dated December 2, 2024)

95,111 American Depositary Shares representing

47,555,560

Ordinary Shares

Kazia Therapeutics Limited

This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated December 2, 2024 (the “Prospectus”), which forms a part of our Registration Statement on Form F-1 (Registration No. 333-276774), with the information contained in our current report on Form 6-K, furnished to the Securities and Exchange Commission on May 28, 2025 (the “May 28, 2025 Form 6-K”). Accordingly, we have attached the May 28, 2025 Form 6-K to this prospectus supplement.

This prospectus supplement updates and supplements the information in the Prospectus and is not complete without, and may not be delivered or utilized except in combination with, the Prospectus, including any amendments or supplements thereto. This prospectus supplement should be read in conjunction with the Prospectus and if there is any inconsistency between the information in the Prospectus and this prospectus supplement, you should rely on the information in this prospectus supplement.

The ADSs are listed on The Nasdaq Capital Market (“Nasdaq”) under the symbol “KZIA.” On May 27, 2025, the last reported sale price of the ADSs on Nasdaq was $3.74 per ADS.

Investing in our securities involves a high degree of risk. See “Risk Factors” beginning on page 9 of the Prospectus and the “Risk Factors” in “Item 3. Key Information—D. Risk Factors” of our most recent Annual Report on Form 20-F, which is incorporated by reference in the Prospectus, as well as in any other recently filed reports and, if any, in any applicable prospectus supplement.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of the Prospectus or this prospectus supplement. Any representation to the contrary is a criminal offense.

The date of this prospectus supplement is May 28, 2025

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of May, 2025

Commission File Number 000-29962

Kazia Therapeutics Limited

(Translation of registrant’s name into English)

Three International Towers Level 24 300 Barangaroo Avenue Sydney NSW 2000

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☒   Form 40-F ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ☐

INFORMATION CONTAINED IN THIS FORM 6-K REPORT

Results of Annual General Meeting

As scheduled, Kazia Therapeutics Limited (the “Company”) held its Annual General Meeting (the “AGM”) at 10:00 a.m., Sydney time, on May 22, 2025, at an online venue. At the AGM, the Company’s shareholders voted on one resolution with respect to the re-election of Robert Apple as a director of the Company, which is listed below and was described in more detail in the Company’s Notice of Annual General Meeting and accompanying Explanatory Statement, which are available electronically on the “For Investors” section of the Company’s website.

Resolution 1 – Re-election of Robert Apple as Director

The re-election of Robert Apple as a director of the Company was approved by the Company’s shareholders. The results of the approval were as follows:

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, thereunto duly authorized.