Announcement PDF 604 page 1 of 4 15 July 2001 Form 604 Corporations Act 2001 Section 671B Notice of change of interests of substantial holder To Company Name/Scheme ELECTRO OPTIC SYSTEMS HOLDINGS LIMITED (ASX: EOS) ACN/ARSN ACN 092 708 364 1. Details of substantial holder(1) Name WASHINGTON H. SOUL PATTINSON AND COMPANY LIMITED (Soul Patts) AND SUBSIDIARIES ACN/ARSN (if applicable) ACN 687 534 023 There was a change in the interests of the substantial holder on 22/05/2026 The previous notice was given to the company on 25/09/2025 The previous notice was dated 25/09/2025 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 (2) had a relevant interest (3) 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 (4) Previous notice Present notice Person’s votes Voting power (5) Person’s votes Voting power (5) Ordinary Shares Soul Patts 17,596,807 9.12% 17,900,000 8.46% Total 17,596,807 9.12% 17,900,000 8.46% Note: Soul Patts has entered into short cash settled share forwards. Key terms are described in Annexure A. These forwards do not give Soul Patts any relevant interest in the shares beyond those disclosed above. 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 are as follows: Date of change Person whose relevant interest changed Nature of change (6) Consideration given in relation to change (7) Class and number of securities affected Person’s votes affected See Annexure A 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 Person entitled to be registered as holder (8) Nature of relevant interest (6) Class and number of securities Person’s votes Soul Patts, Soul Patts Holdings Pty Limited and WHSP Holdings Pty Limited WHSP Holdings Pty Limited WHSP Holdings Pty Limited Relevant interest pursuant to section 608(1)(a) and 608(1)(b) of the Corporations Act 2001 (Cth) 17,900,000 ORDINARY SHARES 8.46% Brickworks Limited WHSP Holdings Pty Limited WHSP Holdings Pty Limited Relevant interest pursuant to section 608(3) of the Corporations Act 2001 (Cth) 17,900,000 ORDINARY SHARES 8.46% 604 page 2 of 4 15 July 2001 5. Changes in association The persons who have become associates (2) of, ceased to be associates of, or have changed the nature of their association (9) with, the substantial holder in relation to voting interests in the company or scheme are as follows: Name and ACN/ARSN (if applicable) Nature of association See list of subsidiaries of Soul Patts as disclosed in the "Controlled Entities" Note of the last Annual Report. 6. Addresses The addresses of persons named in this form are as follows: Name Address Soul Patts, WHSP Holdings Pty Limited, Soul Patts Holdings Pty Limited and subsidiaries Level 8, 121 Castlereagh Street, Sydney, NSW 2000 Brickworks Limited 738-780 Wallgrove Rd, Horsley Park, NSW 2175 Signature print name Lillie Johnson capacity Company Secretary sign here date 27 May 2026 DIRECTIONS (1) If there are a number of substantial holders with similar or related relevant interests (eg. a corporation and its related corporations, or the manager and trustee of an equity trust), the names could be included in an annexure to the form. If the relevant interests of a group of persons are essentially similar, they may be referred to throughout the form as a specifically named group if the membership of each group, with the names and addresses of members is clearly set out in paragraph 6 of the form. (2) See the definition of “associate” in section 9 of the Corporations Act 2001. (3) See the definition of “relevant interest” in sections 608 and 671B(7) of the Corporations Act 2001. (4) The voting shares of a company constitute one class unless divided into separate classes. (5) The person’s votes divided by the total votes in the body corporate or scheme multiplied by 100. (6) Include details of: (a) any relevant agreement or other circumstances because of which the change in relevant interest occurred. If subsection 671B(4) applies, a copy of any document setting out the terms of any relevant agreement, and a statement by the person giving full and accurate details of any contract, scheme or arrangement, must accompany this form, together with a written statement certifying this contract, scheme or arrangement; and (b) any qualification of the power of a person to exercise, control the exercise of, or influence the exercise of, the voting powers or disposal of the securities to which the relevant interest relates (indicating clearly the particular securities to which the qualification applies). See the definition of “relevant agreement” in section 9 of the Corporations Act 2001. (7) Details of the consideration must include any and all benefits, money and other, that any person from whom a relevant interest was acquired has, or may, become entitled to receive in relation to that acquisition. Details must be included even if the benefit is conditional on the happening or not of a contingency. Details must be included of any benefit paid on behalf of the substantial holder or its associate in relation to the acquisitions, even if they are not paid directly to the person from whom the relevant interest was acquired. (8) If the substantial holder is unable to determine the identity of the person (eg. if the relevant interest arises because of an option) write “unknown”. (9) Give details, if appropriate, of the present association and any change in that association since the last substantial holding notice. 604 page 3 of 4 15 July 2001 Annexure A Form 604 – Notice of change of interests of substantial holder by Washington H. Soul Pattinson and Company Limited (Soul Patts). This and the following 1 page form Annexure A referred to in Form 604 – Notice of change of interests of substantial holder by Soul Patts. Name: Lillie Johnson Capacity: Company Secretary Signature: Date: 27 May 2026 604 page 4 of 4 15 July 2001 Transactions Date Purchased or sold Transaction Details Number Price Total Cost 25-Sep-25 Total Shares as at last Substantial Notice 17,596,807 14-Oct-25 Purchase 100,000 6.8749 687,490.00 14-Oct-25 Purchase 50,000 6.8754 343,770.00 15-Oct-25 Purchase 50,000 6.1749 308,745.00 15-Oct-25 Purchase 50,000 6.0646 303,230.00 17-Oct-25 Sale (746,807) 5.4621 (4,079,134.51) 20-May-26 Purchase (Entitlement Offer) 937,500 8.0000 7,500,000.00 22-May-26 Sale (137,500) 8.8065 (1,210,893.75) 26-May-26 17,900,000 Holder of relevant interest Class and number of securities Voting Power (%) Soul Patts, WHSP Holdings Pty Limited, Soul Patts Holdings Pty Limited and Brickworks Limited 17,900,000 Ordinary Fully Paid Shares 8.46%* Total 17,900,000 Ordinary Fully Paid Shares 8.46%* * % Voting power in the present notice is based on 211,702,099 EOS ordinary shares on issue. Key Terms of the Share Forward Transactions Identity of taker: WHSP Holdings Pty Limited Entry Date: 21 May 2026 Relevant Security: Fully Paid ordinary shares of Electro Optic Systems Holdings Ltd Number of securities to which the derivative relates: 960,000 shares however the counterparty can elect to increase to 1,920,000 Price: $12.4337 Type of derivative: Short Cash Settled Share Forward Identity of taker: WHSP Holdings Pty Limited Entry Date: 22 May 2026 Relevant Security: Fully Paid ordinary shares of Electro Optic Systems Holdings Ltd Number of securities to which the derivative relates: 300,000 shares however the counterparty can elect to increase to 600,000 Price: $13.6476 Type of derivative: Short Cash Settled Share Forward