Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

Appointment of David White as Chief Executive Officer

On March 18, 2026, the Board of Directors (the "Board") of Onconetix, Inc, a Delaware corporation (the "Company") appointed David White as Chief Executive Officer of the Company effective as of that date. Karina Fedasz, the immediate past Interim Chief Executive Officer of the Company, will continue to serve as its Interim Chief Financial Officer.

Mr. White is an Independent Director with more than 30 years of executive leadership and board experience, having served in senior roles including Chief Executive Officer, Chief Financial Officer, and Chief Operating Officer. He served as an independent director and Chair of the Audit Committee of SRx Holdings, Inc. (NYSE American: SRXH) from February 2025 to October 2025. He also served as an independent director and Chair of the Audit Committee of AG Growth International, Inc., a TSX-listed global equipment manufacturer from November 2006 to May 2025. Mr. White is currently an independent director of Art's Way Manufacturing, Inc., a NASDAQ-listed equipment manufacturer, where he is also the chairman of their compensation committee and a member on the audit committee. He was also an independent director of Patient Care Logistics Solutions, a private equity-sponsored passenger transportation and patient care logistics company, from March 2018 to December 2025. Earlier in his career, Mr. White served as President and Chief Executive Officer of Student Transportation Partners from April 2021 to May 2023, where he led the formation of the management team and established the company's strategic vision, before transitioning to its Board of Directors in May 2023. He also served as Chief Executive Officer of TransCare Inc. from 2008 to 2012, a New York-based ambulance company providing emergency medical response services and transit operations across multiple major U.S. cities.

Mr. White previously held senior leadership roles at Laidlaw Inc., where he served as Chief Financial Officer of the Passenger Services Group and Regional General Manager for Western Canadian operations from 1991 to 1993 before becoming President of the company's Ambulance division in 1993. He also served as President and Chief Operating Officer of Student Transportation of America during a period of significant growth following its public offering from May 2021 to August 2025. Mr. White began his career as a financial executive with Coopers & Lybrand in 1975 and held roles with several Fortune 1000 companies, including John Labatt Limited and Lawson Mardon. He holds a Bachelor of Arts from the University of Western Ontario and a Master of Business Administration from the University of Toronto, and is a Chartered Professional Accountant (CPA, CA) and ICD.D designee.

In connection with Mr. White's appointment as Chief Executive Officer, the Compensation Committee of the Board (the "Compensation Committee") has reduced the monthly compensation of i) Ms. Fedasz by $5,000 and ii) Andrew Oakley, the Lead Independent Director, by $26,000, with both reductions effective as of March 18, 2026.

Mr. White has no family relationships with any of the Company's directors or executive officers, and he is not a party to, and does not have any direct or indirect material interest in any transaction requiring disclosure under Item 404(a) of Regulation S-K. There are no arrangements or understandings between Mr. White and any other persons pursuant to which he was selected as Chief Executive Officer.

In connection with Mr. White's appointment, the Company and Mr. White entered into an employment agreement (the "White Employment Agreement"), pursuant to which Mr. White will serve as Chief Executive Officer of the Company and will be paid a monthly base salary of $21,700. Pursuant to the White Employment Agreement, Mr. White agreed to be bound by certain non-compete, confidentiality and non-solicitation covenants contained therein.

The foregoing description of the White Employment Agreement is qualified in its entirety by reference to the text of such agreement, which is filed as Exhibit 10.1 to this Current Report on Form 8-K and incorporated herein by reference.