Announcement PDF ASX Announcement 20 May 2025 Share Purchase Plan Offer Opens SYDNEY Australia, 20 May 2025 – Atomo Diagnostics Limited (ASX: AT1) (Atomo or the Company) confirms that the Atomo Share Purchase Plan (SPP Offer) opens today. Attached is copy of the SPP Offer Letter sent to each holder of fully paid ordinary shares who, as at the record date of 7.00pm (AEST) on Wednesday, 23 April 2025 had a registered address in Australia (and who otherwise meet certain other conditions as set out in the Prospectus) (Eligible Shareholder). A copy of the Prospectus and Target Market Determination is available for download at https://investors.atomodiagnostics.com/investor-centre/?page=spp-prospectus. Eligible Shareholders who have provided an email address will be sent an email communication. Eligible Shareholders who have not provided an email address will be sent an SPP Offer Letter via post. The SPP Offer is expected to close at 5.00 pm (AEST) on Monday, 23 June 2025 (unless extended, withdrawn or closed early by the Company). ~ ENDS ~ For more information, please contact: John Kelly Managing Director & CEO e. john.kelly@atomodiagnostics.com p. +61 401 922 279 This announcement was authorised by the Managing Director & CEO. About Atomo Atomo is an Australian-headquartered medical device company supplying unique, integrated rapid diagnostic test (RDT) devices to the global diagnostic market. Atomo’s unique patented devices simplify testing procedures, enhance usability and improve reliability across rapid point-of-care (POC) and at-home testing applications. The Company has successfully commercialised a number of products across international markets and has supply agreements in place for testing applications targeting infectious diseases including HIV, Active Syphilis, viral vs bacterial differentiation, as well as the early detection of pregnancy. See more at www.atomodiagnostics.com Atomo Diagnostics Limited ACN 142 925 684 Level 1, 3-5 George St Leichhardt NSW 2040 20 May 2025 NOT FOR DISTRIBUTION OR RELEASE IN THE UNITED STATES OR TO US PERSONS Dear Shareholder Atomo Diagnostics Limited Share Purchase Plan I am pleased to invite you to participate in the offer of fully paid ordinary shares (Shares) in Atomo Diagnostics Limited ACN 142 925 684 (Atomo, ATI or Company) under the share purchase plan established by Atomo (Offer or Plan). On 24 April 2025, Atomo announced its intention to raise, in total, $1,000,000 under the Offer. The Offer is not underwritten, but the Company reserves the right to increase this maximum based on overall applications received. In addition participants will receive one free attaching option (Option) for every Share subscribed. The Options are to be unlisted and each Option is to have a nil issue price, an exercise price of $0.04, and an expiry date of 36 months from their date of issue. Details of the Offer and how to participate can be found in the Prospectus (Prospectus) and the target market determination (TMD), available on Atomo's website https://investors.atomodiagnostics.com/investor-centre/?page=spp-prospectus. The Prospectus and TMD have also been released to ASX. Overview of the Offer The Offer provides you, as an Eligible Shareholder of Atomo (subject to certain conditions), with the opportunity to acquire a minimum of $1,000 and up to, in aggregate, $30,000 of Shares in Atomo at an issue price of $0.0185 per Share (Issue Price) free from any brokerage or transaction costs. The Issue Price is the same as the issue price applicable to the placement to institutional and sophisticated investors to raise approximately $2.1 million (Placement). The Issue Price represents a 7.35% discount to the closing price of Shares on 21 April 2025 (being the last trading day prior to announcement of the SPP) and a 11.9% to the volume weighted average price of Shares for the 5 trading days to 21 April 2025. Atomo is seeking to raise a maximum of $1,000,000 under the Offer. The directors have reserved the right to increase this maximum by accepting oversubscriptions under the Plan. Similarly, the Company reserves the right to either increase the maximum or scale back applications in its sole and absolute discretion. If applications are scaled back, excess funds will be returned to applicants without interest. Participation in the Offer is optional and is open to Eligible Shareholders who, as at the Record Date (7:00pm (Sydney time) on 23 April 2025 2025), were registered as holders of fully paid ordinary shares in Atomo and whose address on the share register is in Australia. If an Eligible Shareholder holds shares as a Custodian the Offer is also being made to the Custodian and, subject to certain conditions, the Custodian has the discretion to extend the Offer to the relevant beneficiaries. Eligible Shareholders may apply for a parcel of new Shares under the Plan valued at $1,000, $2,500, $5,000, $7,500, $10,000, $15,000, $20,000, $25,000 or $30,000. Depending on demand, Atomo may scale back applications or (to the extent permitted by the ASX Listing Rules) raise a higher amount, at its absolute discretion. The issue of Shares and Options under the Plan is also subject to shareholder approval at the general meeting scheduled to occur on 23 June 2025. If shareholders do not approve the issue, the Company reserves the right to scale back the Offer to within its then current placement capacity for the purposes of ASX Listing Rule 7.1. Use of Funds Allocation of funds $ % Product Development (New Products) 575,000 18% Operational Activities to reduce Product Cost of Goods (COGS) 455,000 15% Regulatory Activities and Product Quality Assurance 395,000 13% Commercial / Business Development 745,000 24% Corporate administration, management and working capital2 830,000 27% Costs of the Offers 126,000 4% TOTAL 3,126,000 100% Timing The Offer will be undertaken in accordance with the timetable below. However, Atomo reserves the right to vary the dates and times set out below in its complete discretion, subject to the Corporations Act and other applicable laws. Event Date Record Date (the business day prior to Atomo's announcement of the Plan) 7:00pm (Sydney time), Wednesday, 23 April 2025 Opening Date Tuesday, 20 May 2025 General Meeting to approve the issue of the securities under the Plan 10.30am (Sydney time) Monday, 23 June 2025 Closing Date 5.00pm (Sydney time) Monday, 23 June 2025 Allotment Date (i.e. the date of issue of Shares under the Offer) Before noon (Sydney time) Friday, 27 June 2025 Date on which Shares issued under the Offer are expected to commence quotation on ASX Monday, 30 June 2025 To participate in the Offer, you should pay via BPAY® in accordance with the instructions on your personalised Application Form.   Eligible Shareholders can download a copy of the Prospectus, the TMD and their personalised application form online at www.investorserve.com.au; or contact the Offer Information Line on 1300 737 760 (within Australia) or +61 2 9290 9600 (outside Australia) from 8.30am to 5.00pm (Sydney, Australia time) Monday to Friday to request a copy of the prospectus and their personalised Application Form. You should be aware that your own financial institution may implement earlier cut-off times with regard to electronic payment, and you should therefore take this into consideration when making payment. It is your responsibility to ensure that funds submitted through BPAY® are received by 5.00pm (Sydney, Australia time) on 23 June 2025, unless the SPP is extended. Shareholders should read the Prospectus, TMD and Application Form in full prior to making an application for securities under the Plan. Atomo will not be printing or despatching hard copies of the Prospectus, or TMD except in response to specific requests by an Eligible Shareholder. If you are unable to access the documents online and need to make a request for hard copies to be posted or emailed ot you, please contact the Registry on 1300 737 760 (callers within Australia) and +61 2 9290 9600 (callers outside Australia) from 8.15am to 5.30pm (Sydney time) during the Offer period. Page 2 Further information In accordance with the terms and conditions contained in the Prospectus, the Offer is non-renounceable and securities in Atomo may be issued under the Offer only to the Eligible Shareholder. In deciding whether to participate in the Offer, you should seek your own independent financial, legal and taxation advice in respect of the Offer. No cooling off regime applies to the acquisition of Shares under the Offer. On behalf of the Board, I thank you for your continued support of Atomo and I invite you to consider participating in the Offer. Yours faithfully Mathew Watkins Company Secretary Atomo Diagnostics Limited Page 3