Announcement PDF External Use Authorized 603 page 1/2 15 July 2001 Form 603 Corporations Act 2001 Section 671B Notice of initial substantial holder To Company Name/Scheme Electro Optic Systems Holdings Limited ACN/ARSN 092 708 364 1. Details of substantial holder (1) Name Vanguard Group (The Vanguard Group, Inc. and its controlled entities including those listed in Annexure A) ACN/ARSN (if applicable) N/A The holder became a substantial holder on 20 March 2026 2. Details of 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 on the date the substantial holder became a substantial holder are as follows: Class of securities (4) Number of securities Person’s votes (5) Voting power (6) Ordinary 9,838,846 9,838,846 5.099% 3. Details of relevant interests The nature of the relevant interest the substantial holder or an associate had in the following voting securities on the date the substantial holder became a substantial holder are as follows: Holder of relevant interest Nature of relevant interest (7) Class and number of securities Vanguard Group Vanguard Group is the manager of various Mutual funds and accounts and in that capacity has the power to dispose of the shares. The other members of Vanguard Group have a relevant interest under section 608(3) of the Corporations Act. Ordinary – 9,838,846 4. Details of present registered holders The persons registered as holders of the securities referred to in paragraph 3 above are as follows: Holder of relevant interest Registered holder of securities Person entitled to be registered as holder (8) Class and number of securities Vanguard Group Brown Brothers Harriman Various funds and other accounts of Vanguard Group Ordinary – 107,278 Vanguard Group BNY Mellon Various funds and other accounts of Vanguard Group Ordinary – 780,602 Vanguard Group JP Morgan Chase Bank, N.A. Various funds and other accounts of Vanguard Group Ordinary – 7,165,428 Vanguard Group State Street Bank and Trust Company Various funds and other accounts of Vanguard Group Ordinary – 1,785,538 5. Consideration The consideration paid for each relevant interest referred to in paragraph 3 above, and acquired in the four months prior to the day that the substantial holder became a substantial holder is as follows: External Use Authorized Holder of relevant interest Date of acquisition Consideration (9) Class and number of securities See Annexure A 603 page 2/2 15 July 2001 6. Associates The reasons the persons named in paragraph 3 above are associates of the substantial holder are as follows: Name and ACN/ARSN (if applicable) Nature of association N/A N/A 7. Addresses The addresses of persons named in this form are as follows: Name Address Vanguard Group P.O. Box 2600, V26 Valley Forge, PA 19482 USA print name Shawn Acker capacity Compliance Manager sign here date 25 March 2026 External Use Authorized DIRECTIONS (1) If there are a number of substantial holders with similar or related 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 7 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 total number of votes attached to all the voting shares in the company or voting interests in the scheme (if any) that the person or an Associate has a relevant interest in. (6) The person’s votes divided by the total votes in the body corporate or scheme multiplied by 100. (7) Include details of: (a) any relevant agreement or other circumstances by which the relevant interest was acquired. 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. (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) Details of the consideration must include any and all benefits, moneys and other, that any person from whom a relevant interest has 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 of its associate in relation to the acquisitions, even if they are not paid directly to the person from whom the relevant interest was acquired. Annexure A To Company Electro Optic Systems Holdings Limited ACN/ARSN 092 708 364 Substantial Holder Name Vanguard Group ACN/ARSN N/A Date of change Person whose relevant interest changed Nature of Change(6) Consideration given in relation to change(7) Class Number of securities affected Person's votes affected 16-Feb-2026 The Vanguard Group, Inc. BUY 6.32 Ordinary 663 663 16-Feb-2026 The Vanguard Group, Inc. BUY 6.32 Ordinary 3,740 3,740 16-Feb-2026 The Vanguard Group, Inc. BUY 6.32 Ordinary 23,568 23,568 16-Feb-2026 The Vanguard Group, Inc. BUY 6.32 Ordinary 45,770 45,770 16-Feb-2026 The Vanguard Group, Inc. BUY 6.32 Ordinary 3,804 3,804 16-Feb-2026 The Vanguard Group, Inc. BUY 6.32 Ordinary 29,611 29,611 16-Feb-2026 The Vanguard Group, Inc. BUY 6.32 Ordinary 11,488 11,488 16-Feb-2026 The Vanguard Group, Inc. BUY 6.32 Ordinary 2,328 2,328 17-Feb-2026 The Vanguard Group, Inc. BUY 6.86 Ordinary 664 664 17-Feb-2026 The Vanguard Group, Inc. BUY 6.86 Ordinary 3,740 3,740 17-Feb-2026 The Vanguard Group, Inc. BUY 6.86 Ordinary 23,569 23,569 17-Feb-2026 The Vanguard Group, Inc. BUY 6.86 Ordinary 45,769 45,769 17-Feb-2026 The Vanguard Group, Inc. BUY 6.86 Ordinary 3,803 3,803 17-Feb-2026 The Vanguard Group, Inc. BUY 6.86 Ordinary 29,611 29,611 17-Feb-2026 The Vanguard Group, Inc. BUY 6.86 Ordinary 11,488 11,488 17-Feb-2026 The Vanguard Group, Inc. BUY 6.86 Ordinary 2,328 2,328 18-Feb-2026 The Vanguard Group, Inc. BUY 7.66 Ordinary 1,990 1,990 18-Feb-2026 The Vanguard Group, Inc. BUY 7.66 Ordinary 11,221 11,221 18-Feb-2026 The Vanguard Group, Inc. BUY 7.66 Ordinary 70,705 70,705 18-Feb-2026 The Vanguard Group, Inc. BUY 7.66 Ordinary 137,308 137,308 18-Feb-2026 The Vanguard Group, Inc. BUY 7.66 Ordinary 11,411 11,411 18-Feb-2026 The Vanguard Group, Inc. BUY 7.66 Ordinary 88,834 88,834 18-Feb-2026 The Vanguard Group, Inc. BUY 7.66 Ordinary 34,462 34,462 18-Feb-2026 The Vanguard Group, Inc. BUY 7.66 Ordinary 6,985 6,985 27-Feb-2026 The Vanguard Group, Inc. BUY 8.98 Ordinary 107,278 107,278 20-Mar-2026 The Vanguard Group, Inc. BUY 9.90 Ordinary 17,218 17,218 20-Mar-2026 The Vanguard Group, Inc. BUY 9.90 Ordinary 33,182 33,182 20-Mar-2026 The Vanguard Group, Inc. BUY 9.90 Ordinary 178,396 178,396 20-Mar-2026 The Vanguard Group, Inc. BUY 9.90 Ordinary 40,536 40,536 20-Mar-2026 The Vanguard Group, Inc. BUY 9.90 Ordinary 1,062,729 1,062,729 20-Mar-2026 The Vanguard Group, Inc. BUY 9.90 Ordinary 2,121,343 2,121,343 20-Mar-2026 The Vanguard Group, Inc. BUY 9.90 Ordinary 162,681 162,681 20-Mar-2026 The Vanguard Group, Inc. BUY 9.90 Ordinary 1,414,844 1,414,844 20-Mar-2026 The Vanguard Group, Inc. BUY 9.90 Ordinary 541,465 541,465 20-Mar-2026 The Vanguard Group, Inc. BUY 9.90 Ordinary 113,888 113,888 20-Mar-2026 The Vanguard Group, Inc. BUY 9.90 Ordinary 2,856 2,856 19-Dec-2025 Vanguard Investments Australia Ltd. BUY 8.49 Ordinary 34,930 34,930 22-Dec-2025 Vanguard Investments Australia Ltd. BUY 8.10 Ordinary 14,970 14,970 22-Jan-2026 Vanguard Investments Australia Ltd. BUY 10.80 Ordinary 24,752 24,752 25-Feb-2026 Vanguard Investments Australia Ltd. BUY 8.30 Ordinary 28,221 28,221 27-Feb-2026 Vanguard Investments Australia Ltd. BUY 8.98 Ordinary 267,351 267,351 27-Feb-2026 Vanguard Investments Australia Ltd. BUY 8.98 Ordinary 68,552 68,552 11-Mar-2026 Vanguard Investments Australia Ltd. BUY 10.71 Ordinary 10,828 10,828 12-Mar-2026 Vanguard Investments Australia Ltd. BUY 9.92 Ordinary 20,158 20,158 20-Mar-2026 Vanguard Investments Australia Ltd. BUY 9.90 Ordinary 84,270 84,270 This is Annexure A of 1 page referred to in Form 603, Notice of initial substantial holder. Signature: Name: Shawn Acker Capacity: Compliance Manager Date: 25 March 2026 # External Use Authorized