Announcement PDF Notice of change of interests of substantial shareholder Form 604 Corporations Act Section 671B To: Electro Optic Systems Holdings Ltd (“EOS”, Ordinary Fully Paid) 1. Details of substantial shareholder Citigroup Global Markets Australia Pty Limited (ACN 003 114 832) and each of the related bodies corporate in the Citigroup group of companies worldwide (for more details please visit www.citigroup.com). The previous notice was dated and given to the company on 9 October 2026. 2. Previous and present voting power The total number of votes attached to all the voting shares in the company or voting interests in the scheme that the substantial holder or an associate had a relevant interest in when last required, and when now required, to give a substantial holding notice to the company or scheme, are as follows: Class of securities Previous notice Present notice Person’s votes Voting power Person’s votes Voting power Ordinary Fully Paid 11,270,681 5.0837% 15,455,113 6.9711% 3. Changes in relevant interests Particulars of each change in, or change in the nature of, a relevant interest of the substantial holder or an associate in voting securities of the company or scheme, since the substantial holder was last required to give a substantial holding notice to the company or scheme are as follows: Date of change Person whose relevant interest changed Nature of change Class and number of securities affected 13 October 2026 Citibank, N.A. Sydney Branch Citibank, N.A. Sydney Branch holds an increased relevant interest in these shares acting as Agent Lender and as the holder of securities subject to an obligation to return under a securities lending agreement. Refer to Annexure A. 718,190 Ordinary Fully Paid 13 October 2026 Citigroup Global Markets Australia Pty Limited Citigroup Global Markets Australia Pty Limited holds an increased relevant interest in these shares pursuant to contracts entered into subject to an obligation to return under a securities lending agreement and pursuant to contracts entered into in the 435,685 Ordinary Fully Paid ordinary course of business on a stock market of a stock exchange, containing no terms and conditions other than standard terms and conditions. Refer to Annexure A. 13 October 2026 Citigroup Global Markets Inc Citigroup Global Markets Inc holds an increased relevant interest in these shares pursuant to contracts entered into subject to an obligation to return under a securities lending agreement. Refer to Annexure A. 1,361,184 Ordinary Fully Paid 13 October 2026 Citigroup Global Markets Limited Citigroup Global Markets Limited holds an increased relevant interest in these shares pursuant to contracts entered into subject to an obligation to return under a securities lending agreement. Refer to Annexure A. 1,669,373 Ordinary Fully Paid 4. Present relevant interests Particulars of each relevant interest of the substantial holder in voting securities after the change are as follows: Holder of Relevant interest Registered holder of securities Nature of change Class and number of securities Citibank, N.A. Sydney Branch Various Citibank, N.A. Sydney Branch holds a relevant interest in these shares acting as Agent Lender and as the holder of securities subject to an obligation to return under a securities lending agreement. 2,233,132 Ordinary Fully Paid Citigroup Global Markets Australia Pty Limited Citicorp Nominees Pty Limited Citigroup Global Markets Australia Pty Limited holds a relevant interest in these shares pursuant to contracts entered into subject to an obligation to return under a securities lending agreement and pursuant to contracts entered into in the ordinary course of business on a stock market of a stock exchange, containing no terms and conditions other than standard terms and conditions. Refer to Annexure A. 5,815,721 Ordinary Fully Paid Citigroup Global Markets Inc Citicorp Nominees Pty Limited Citigroup Global Markets Inc holds a relevant interest in these shares pursuant to contracts entered into subject to an obligation to return under a securities lending agreement. Refer to Annexure A. 5,476,480 Ordinary Fully Paid Citigroup Global Markets Limited Citicorp Nominees Pty Limited Citigroup Global Markets Limited holds a relevant interest in these shares pursuant to contracts entered into subject to an obligation to return under a securities lending agreement. Refer to Annexure A. 1,929,780 Ordinary Fully Paid 5. Changes in association The persons who have become associates of, ceased to be associates of, or have changed the nature of their association with, the substantial holder in relation to voting interests in the company or scheme are as follows: No changes in association. 6. Addresses The addresses of persons named in this form are as follows: Name Address Citibank, N.A. Sydney Branch Two Park 2 Park St Sydney, NSW 2000 Australia Citigroup Global Markets Pty Limited Two Park 2 Park St Sydney, NSW 2000 Australia Citigroup Global Markets Inc 388 Greenwich St New York, NY 10013, United States Citigroup Global Markets Limited Citigroup Centre, Canary Wharf 33 Canada Square London, E14 5LB, United Kingdom Dated this day, 15 October 2026. Ji Hyun Kim Citigroup Global Markets Australia Pty Limited T: +61 2 8225 2489 Annexure A This is Annexure A of 2 pages referred to in Form 604 ‘Notice of change of interests of substantial shareholder” Schedule (Loan) Type of Agreement AMSLA / GMSLA / MSLA Parties to Agreement Various Transfer date Various Holder of voting rights Borrower Are there any restrictions on voting rights? No Scheduled return date Unknown Does the borrower have the right to return early? Yes If yes, details Standard AMSLA / GMSLA / MSLA terms Does the lender have the right to recall early? Yes If yes, details Standard AMSLA / GMSLA / MSLA terms Will the securities be returned on settlement? n/a Statement If requested by the company to whom the prescribed form must be given, or if requested by ASIC, Citi will give a copy of the AMSLA / GMSLA / MSLA to the company or ASIC. Schedule (Agency Lending Agreement) Type of Agreement Securities Lending Agency Agreement (SLAA) Parties to Agreement Various Circumstances under which the agent lender can exercise the authorisations in relation to the securities Agent Lender can only exercise authority, as agent, in relation to the lender’s securities as defined and agreed in the Securities Lending Agency Agreement. Circumstances under which the agent lender is subject to any restrictions in how it can deal with the securities Lenders will define the restrictions and/or securities lending parameters in the Securities Lending Agency Agreement entered into with the lending agent. Such restrictions/parameters include specific designated accounts, lendable limits, acceptable collateral and/or cash reinvestment guidelines. Does the agent lender have the right to recall early? Agent Lenders have the right to early recall on behalf of Lender’s instructions. However, the expectation is the Lender and Borrower would have mutually agreed no sales/recall of the securities during the duration of the loan term. Hence, borrowers are not obligated to return the securities early for termed loans. If yes, details Authorised under the standard Securities Lending Agency Agreement terms. Statement If requested by the company to whom the prescribed form must be given, or if requested by ASIC, Citi will give a copy of the authorisation agreement to the company or ASIC.