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 18 September 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 12,576,003 12,576,003 5.672% 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 – 12,576,003 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 – 156,032 Vanguard Group BNY Mellon Various funds and other accounts of Vanguard Group Ordinary – 937,096 Vanguard Group JP Morgan Chase Bank, N.A. Various funds and other accounts of Vanguard Group Ordinary – 9,175,118 Vanguard Group State Street Bank and Trust Company Various funds and other accounts of Vanguard Group Ordinary – 2,307,757 External Use Authorized 603 page 2/2 15 July 2001 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: Holder of relevant interest Date of acquisition Consideration (9) Class and number of securities See Annexure A 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 23 September 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 Ltd 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 22-May-2026 The Vanguard Group, Inc. BUY 8.84 Ordinary 1,786 1,786 22-May-2026 The Vanguard Group, Inc. BUY 8.84 Ordinary 5,358 5,358 27-May-2026 The Vanguard Group, Inc. BUY 9.19 Ordinary 4,589 4,589 02-Jun-2026 The Vanguard Group, Inc. BUY 12.33 Ordinary 6,856 6,856 09-Jun-2026 The Vanguard Group, Inc. BUY 10.40 Ordinary 19,311 19,311 07-Jul-2026 The Vanguard Group, Inc. BUY 9.83 Ordinary 1,980 1,980 15-Jul-2026 The Vanguard Group, Inc. BUY 8.26 Ordinary 380 380 17-Jul-2026 The Vanguard Group, Inc. BUY 7.03 Ordinary 1,606 1,606 20-Jul-2026 The Vanguard Group, Inc. BUY 6.83 Ordinary 2,433 2,433 10-Aug-2026 The Vanguard Group, Inc. SELL 7.39 Ordinary (562,999) (562,999) 11-Aug-2026 The Vanguard Group, Inc. BUY 7.96 Ordinary 1,758 1,758 18-Aug-2026 The Vanguard Group, Inc. BUY 8.57 Ordinary 333 333 21-Aug-2026 The Vanguard Group, Inc. SELL 8.90 Ordinary (3,229) (3,229) 21-Aug-2026 The Vanguard Group, Inc. BUY 8.90 Ordinary 3,229 3,229 24-Aug-2026 The Vanguard Group, Inc. BUY 8.60 Ordinary 155 155 26-Aug-2026 The Vanguard Group, Inc. SELL 11.24 Ordinary (2,760) (2,760) 26-Aug-2026 The Vanguard Group, Inc. BUY 11.24 Ordinary 487 487 31-Aug-2026 The Vanguard Group, Inc. BUY 9.82 Ordinary 44,974 44,974 01-Sep-2026 The Vanguard Group, Inc. BUY 9.92 Ordinary 13,848 13,848 02-Sep-2026 The Vanguard Group, Inc. BUY 9.40 Ordinary 109 109 08-Sep-2026 The Vanguard Group, Inc. BUY 9.52 Ordinary 95 95 11-Sep-2026 The Vanguard Group, Inc. SELL 9.17 Ordinary (3,556) (3,556) 18-Sep-2026 The Vanguard Group, Inc. BUY 10.33 Ordinary 649,174 649,174 18-Sep-2026 The Vanguard Group, Inc. BUY 10.33 Ordinary 41,116 41,116 18-Sep-2026 The Vanguard Group, Inc. BUY 10.33 Ordinary 1,002 1,002 18-Sep-2026 The Vanguard Group, Inc. BUY 10.33 Ordinary 57,402 57,402 18-Sep-2026 The Vanguard Group, Inc. BUY 10.33 Ordinary 13,186 13,186 18-Sep-2026 The Vanguard Group, Inc. BUY 10.33 Ordinary 331,076 331,076 18-Sep-2026 The Vanguard Group, Inc. BUY 10.33 Ordinary 38,481 38,481 18-Sep-2026 The Vanguard Group, Inc. BUY 10.33 Ordinary 2,469 2,469 18-Sep-2026 The Vanguard Group, Inc. BUY 10.33 Ordinary 422,520 422,520 18-Sep-2026 The Vanguard Group, Inc. BUY 10.33 Ordinary 132 132 18-Sep-2026 The Vanguard Group, Inc. BUY 10.33 Ordinary 12,250 12,250 18-Sep-2026 The Vanguard Group, Inc. BUY 10.33 Ordinary 659,644 659,644 27-May-2026 Vanguard Investments Australia Ltd. BUY 9.19 Ordinary 1,350 1,350 29-May-2026 Vanguard Investments Australia Ltd. BUY 11.13 Ordinary 12,428 12,428 19-Jun-2026 Vanguard Investments Australia Ltd. SELL 10.66 Ordinary (6,194) (6,194) 19-Jun-2026 Vanguard Investments Australia Ltd. BUY 10.66 Ordinary 163 163 24-Jun-2026 Vanguard Investments Australia Ltd. BUY 9.75 Ordinary 932 932 25-Jun-2026 Vanguard Investments Australia Ltd. BUY 9.60 Ordinary 1,600 1,600 26-Jun-2026 Vanguard Investments Australia Ltd. SELL 9.44 Ordinary (1,398) (1,398) 26-Jun-2026 Vanguard Investments Australia Ltd. BUY 9.44 Ordinary 1,280 1,280 26-Jun-2026 Vanguard Investments Australia Ltd. BUY 9.44 Ordinary 1,280 1,280 29-Jun-2026 Vanguard Investments Australia Ltd. BUY 9.66 Ordinary 932 932 29-Jun-2026 Vanguard Investments Australia Ltd. BUY 9.64 Ordinary 79,449 79,449 30-Jun-2026 Vanguard Investments Australia Ltd. SELL 10.30 Ordinary (7,706) (7,706) 30-Jun-2026 Vanguard Investments Australia Ltd. BUY 10.30 Ordinary 1,280 1,280 01-Jul-2026 Vanguard Investments Australia Ltd. BUY 9.77 Ordinary 2,385 2,385 01-Jul-2026 Vanguard Investments Australia Ltd. BUY 9.77 Ordinary 1,590 1,590 02-Jul-2026 Vanguard Investments Australia Ltd. BUY 10.01 Ordinary 1,422 1,422 07-Jul-2026 Vanguard Investments Australia Ltd. BUY 9.59 Ordinary 1,113 1,113 07-Jul-2026 Vanguard Investments Australia Ltd. BUY 9.59 Ordinary 795 795 08-Jul-2026 Vanguard Investments Australia Ltd. BUY 8.88 Ordinary 5,595 5,595 09-Jul-2026 Vanguard Investments Australia Ltd. BUY 8.97 Ordinary 1,840 1,840 09-Jul-2026 Vanguard Investments Australia Ltd. BUY 8.97 Ordinary 1,380 1,380 10-Jul-2026 Vanguard Investments Australia Ltd. BUY 8.41 Ordinary 1,134 1,134 10-Jul-2026 Vanguard Investments Australia Ltd. BUY 8.41 Ordinary 4,104 4,104 13-Jul-2026 Vanguard Investments Australia Ltd. BUY 8.04 Ordinary 1,386 1,386 14-Jul-2026 Vanguard Investments Australia Ltd. BUY 7.99 Ordinary 1,312 1,312 14-Jul-2026 Vanguard Investments Australia Ltd. BUY 7.99 Ordinary 2,460 2,460 15-Jul-2026 Vanguard Investments Australia Ltd. BUY 8.26 Ordinary 1,848 1,848 # External Use Authorized Annexure 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-Jul-2026 Vanguard Investments Australia Ltd. BUY 7.62 Ordinary 1,848 1,848 17-Jul-2026 Vanguard Investments Australia Ltd. BUY 7.03 Ordinary 990 990 17-Jul-2026 Vanguard Investments Australia Ltd. BUY 7.03 Ordinary 990 990 17-Jul-2026 Vanguard Investments Australia Ltd. BUY 7.03 Ordinary 1,386 1,386 21-Jul-2026 Vanguard Investments Australia Ltd. BUY 7.16 Ordinary 924 924 21-Jul-2026 Vanguard Investments Australia Ltd. BUY 7.16 Ordinary 1,344 1,344 21-Jul-2026 Vanguard Investments Australia Ltd. BUY 7.16 Ordinary 1,176 1,176 22-Jul-2026 Vanguard Investments Australia Ltd. SELL 7.14 Ordinary (2,772) (2,772) 22-Jul-2026 Vanguard Investments Australia Ltd. SELL 7.14 Ordinary (1,344) (1,344) 23-Jul-2026 Vanguard Investments Australia Ltd. SELL 7.22 Ordinary (1,848) (1,848) 24-Jul-2026 Vanguard Investments Australia Ltd. BUY 6.87 Ordinary 1,344 1,344 28-Jul-2026 Vanguard Investments Australia Ltd. BUY 6.89 Ordinary 1,008 1,008 29-Jul-2026 Vanguard Investments Australia Ltd. BUY 6.67 Ordinary 1,660 1,660 29-Jul-2026 Vanguard Investments Australia Ltd. BUY 6.67 Ordinary 1,328 1,328 30-Jul-2026 Vanguard Investments Australia Ltd. BUY 6.10 Ordinary 1,386 1,386 30-Jul-2026 Vanguard Investments Australia Ltd. BUY 6.10 Ordinary 1,386 1,386 30-Jul-2026 Vanguard Investments Australia Ltd. BUY 6.10 Ordinary 1,848 1,848 30-Jul-2026 Vanguard Investments Australia Ltd. BUY 6.10 Ordinary 1,176 1,176 31-Jul-2026 Vanguard Investments Australia Ltd. BUY 6.69 Ordinary 1,352 1,352 03-Aug-2026 Vanguard Investments Australia Ltd. BUY 6.94 Ordinary 1,575 1,575 05-Aug-2026 Vanguard Investments Australia Ltd. SELL 7.65 Ordinary (2,310) (2,310) 05-Aug-2026 Vanguard Investments Australia Ltd. BUY 7.65 Ordinary 1,368 1,368 07-Aug-2026 Vanguard Investments Australia Ltd. BUY 7.74 Ordinary 1,190 1,190 11-Aug-2026 Vanguard Investments Australia Ltd. BUY 8.00 Ordinary 2,550 2,550 12-Aug-2026 Vanguard Investments Australia Ltd. BUY 8.59 Ordinary 860 860 13-Aug-2026 Vanguard Investments Australia Ltd. BUY 8.51 Ordinary 2,550 2,550 13-Aug-2026 Vanguard Investments Australia Ltd. BUY 8.51 Ordinary 1,020 1,020 14-Aug-2026 Vanguard Investments Australia Ltd. BUY 8.47 Ordinary 1,494 1,494 17-Aug-2026 Vanguard Investments Australia Ltd. BUY 8.95 Ordinary 1,494 1,494 19-Aug-2026 Vanguard Investments Australia Ltd. BUY 8.70 Ordinary 990 990 19-Aug-2026 Vanguard Investments Australia Ltd. BUY 8.70 Ordinary 924 924 21-Aug-2026 Vanguard Investments Australia Ltd. BUY 8.90 Ordinary 1,485 1,485 25-Aug-2026 Vanguard Investments Australia Ltd. BUY 10.58 Ordinary 2,310 2,310 25-Aug-2026 Vanguard Investments Australia Ltd. BUY 10.58 Ordinary 984 984 26-Aug-2026 Vanguard Investments Australia Ltd. BUY 11.24 Ordinary 1,660 1,660 28-Aug-2026 Vanguard Investments Australia Ltd. BUY 10.05 Ordinary 936 936 31-Aug-2026 Vanguard Investments Australia Ltd. BUY 9.82 Ordinary 26,085 26,085 31-Aug-2026 Vanguard Investments Australia Ltd. BUY 9.82 Ordinary 36,400 36,400 01-Sep-2026 Vanguard Investments Australia Ltd. BUY 9.90 Ordinary 1,908 1,908 01-Sep-2026 Vanguard Investments Australia Ltd. BUY 9.90 Ordinary 954 954 02-Sep-2026 Vanguard Investments Australia Ltd. BUY 9.40 Ordinary 1,515 1,515 02-Sep-2026 Vanguard Investments Australia Ltd. BUY 9.40 Ordinary 636 636 04-Sep-2026 Vanguard Investments Australia Ltd. BUY 9.52 Ordinary 966 966 07-Sep-2026 Vanguard Investments Australia Ltd. BUY 9.37 Ordinary 1,088 1,088 07-Sep-2026 Vanguard Investments Australia Ltd. BUY 9.37 Ordinary 810 810 07-Sep-2026 Vanguard Investments Australia Ltd. BUY 9.37 Ordinary 2,430 2,430 10-Sep-2026 Vanguard Investments Australia Ltd. BUY 9.42 Ordinary 978 978 11-Sep-2026 Vanguard Investments Australia Ltd. BUY 9.15 Ordinary 2,445 2,445 11-Sep-2026 Vanguard Investments Australia Ltd. BUY 9.15 Ordinary 978 978 11-Sep-2026 Vanguard Investments Australia Ltd. BUY 9.15 Ordinary 3,185 3,185 14-Sep-2026 Vanguard Investments Australia Ltd. BUY 9.14 Ordinary 2,460 2,460 15-Sep-2026 Vanguard Investments Australia Ltd. BUY 9.23 Ordinary 656 656 16-Sep-2026 Vanguard Investments Australia Ltd. BUY 9.26 Ordinary 820 820 16-Sep-2026 Vanguard Investments Australia Ltd. BUY 9.26 Ordinary 820 820 17-Sep-2026 Vanguard Investments Australia Ltd. BUY 10.00 Ordinary 3,260 3,260 17-Sep-2026 Vanguard Investments Australia Ltd. BUY 10.00 Ordinary 1,630 1,630 17-Sep-2026 Vanguard Investments Australia Ltd. BUY 10.00 Ordinary 1,638 1,638 17-Sep-2026 Vanguard Investments Australia Ltd. BUY 10.00 Ordinary 978 978 18-Sep-2026 Vanguard Investments Australia Ltd. BUY 10.33 Ordinary 582,730 582,730 This is Annexure A of 3 pages referred to in Form 603, Notice of initial substantial holder. Signature: Name: Shawn Acker # External Use Authorized Annexure 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 Capacity: Compliance Manager Date: 23-Sep-2026 # External Use Authorized