Announcement PDF ASX ANNOUNCEMENT 12 October 2026 Radiopharm Theranostics Limited Suite 1, Level 3, 62 Lygon Street, Carlton South VIC 3053 Australia ABN: 57 647 877 889 Not for release to US wire services or distribution in the United States Non-Compliance with Listing Rule 10.11 Sydney, Australia – 12 October 2026 – Radiopharm Theranostics Limited (ASX:RAD; Nasdaq:RADX), a developer of a world-class platform of radiopharmaceutical products for both diagnostic and therapeutic uses, advises that it has been informed by ASX of a breach of Listing Rule 10.11. Listing Rule 10.11 requires that an entity must not issue or agree to issue equity securities to a related party (or associate) without shareholder approval. The Company announced a placement and share purchase plan (SPP) on 24 July 2026, with a corresponding Prospectus released on 30 July 2026. The Prospectus disclosed anticipated director participation in SPP in the table below: The SPP Offer Price was disclosed in the original announcement and Prospectus as “the lower of $0.015 or a 2.5% discount to the VWAP of shares traded on the ASX during the five trading days up to the closing date of the SPP, rounded to the nearest 0.1 cent”. The maximum $0.015 SPP Offer Price was used in the Prospectus. The above information was used to prepare corresponding resolutions in the Notice of Extraordinary General Meeting (EGM) released on 13 August 2026, summarised as: ASX ANNOUNCEMENT 12 October 2026 The Notice of Meeting included a resolution for each participating director as below: “That, for the purposes of Listing Rule 10.11 and for all other purposes, Shareholders approve the issuance and allotment of:  to Director [name]: up to 1,666,667 SPP Shares at the SPP Price per SPP Share and up to 1,666,667 SPP Attaching Options with an exercise price of $0.018 and an expiry of 31 July 2029”. In the Explanatory Memorandum, commentary for the relevant EGM Resolutions 8 (a), (b), (c), (d) noted that the SPP shares would be issued at the SPP Price per SPP Share, with the SPP shares being issued at “the lower of: (a) $0.015; or (b) 2.5% discount to the VWAP of shares traded on the ASX during the five trading days prior to 10 September 2026, being the Closing Date”. Shareholders overwhelming approved the four director SPP resolutions at the EGM, receiving ‘for’ votes of between 94.26% to 95.16%. Per the SPP timeline, and after the EGM, the SPP Offer Price was determined following the Closing Date and announced as $0.009 on 17 September 2026. Although the Company included in the Notice of EGM that the price at which the SPP securities were to be issued was not fixed, and included the formula for calculation of the SPP Price, the resolutions for Listing Rule 10.11 specified the maximum number of SPP Shares and SPP Attaching Options that would be issued to each director and the breach arose because the Company subsequently issued securities in excess of those maximum numbers approved by shareholders at the EGM. ASX ANNOUNCEMENT 12 October 2026 The Company and Directors recognise and acknowledge the importance of market regulation and the discretions available to ASX in application of the Listing Rules. Therefore, and in accordance with ASX Guidance Note 25, the Company advises that the directors will dispose of the shares in excess of the explicit shareholder approval on-market (within 6 weeks of this announcement), with the net proceeds (if any) to be donated to charity. The options in excess of the explicit approval will be cancelled within 7 days. The shares to be disposed and options to be cancelled are set out in the table below. Prospectus and Notice of EGM at maximum SPP Offer Price $0.015 ea. Equites issued at actual SPP Offer Price $0.009 ea. Equities issued in excess of LR 10.11 approval Director Amount SPP Shares SPP Options SPP Shares SPP Options SPP Shares to be sold on market' SPP Options to be cancelled Paul Hopper $25,000 1,666,667 1,666,667 2,777,778 2,777,778 1,111,111 1,111,111 Ian Turner $25,000 1,666,667 1,666,667 2,777,778 2,777,778 1,111,111 1,111,111 Riccardo Canevari $35,000 2,333,333 2,333,333 3,888,889 3,888,889 1,555,556 1,555,556 Bruce Goodwin $25,000 1,666,667 1,666,667 2,777,778 2,777,778 1,111,111 1,111,111 Total $110,000 7,333,334 7,333,334 12,222,223 12,222,223 4,888,889 4,888,889 The Company confirms that in light of this inadvertent breach, the Company and its advisers have closely reviewed the requirements for notices of meeting under Listing Rule 10.11 (in particular as set out in Listing Rule 10.13) and the events leading to this situation, and will ensure strict compliance with the Listing Rules in future. The Company reaffirms its commitment to full compliance with the ASX Listing Rules and ongoing best practice in corporate governance. Authorised on behalf of the Radiopharm Theranostics board of directors by Executive Chairman Paul Hopper. For more information: Riccardo Canevari CEO & Managing Director P: +1 862 309 0293 E: rc@radiopharmtheranostics.com ASX ANNOUNCEMENT 12 October 2026 Paul Hopper Executive Chairman E: paulhopper@lifescienceportfolio.com Matt Wright NWR Communications P: +61 451 896 420 E: matt@nwrcommunications.com.au Follow Radiopharm Theranostics: Website – https://radiopharmtheranostics.com/ Twitter – https://twitter.com/TeamRadiopharm Linked In – https://www.linkedin.com/company/radiopharm-theranostics/ Not an offer of securities This announcement has been prepared for publication in Australia and may not be released to US wire services or distributed in the United States. This announcement does not constitute an offer to sell, or a solicitation of an offer to buy, securities in the United States or any other jurisdiction. Any securities described in this announcement have not been registered under the US Securities Act of 1933 and may not be offered or sold in the United States except in transactions exempt from, or not subject to, the registration requirements of the US Securities Act and applicable US state securities laws. Forward-looking statements This announcement contains certain ‘forward-looking statements’ within the meaning of the securities laws of applicable jurisdictions. Forward-looking statements can generally be identified by the use of forward-looking words such as ‘may,’ ‘should,’ ‘expect,’ ‘anticipate,’ ‘estimate,’ ‘scheduled’ or ‘continue’ or the negative version of them or comparable terminology. Any forecasts or other forward-looking statements contained in this announcement are subject to known and unknown risks and uncertainties and may involve significant elements of subjective judgment and assumptions as to future events which may or may not be correct. There are usually differences between forecast and actual results because events and actual circumstances frequently do not occur as forecast and these differences may be material. Radiopharm does not give any representation, assurance or guarantee that the occurrence of the events expressed or implied in any forward-looking statements in this announcement will actually occur and you are cautioned not to place undue reliance on forward-looking statements.