MATRIX COMPOSITES & ENGINEERING LIMITED — Major Shareholding Notification 2026

Mar 30, 2026

Form 603 Corporations Act 2001 Section 671B

Notice of initial substantial holder

To Company/registered scheme/notified foreign passport fund name Matrix Composites & Engineering Ltd ( MCE ) ACN/ARSN/APFRN ACN 009 435 250 NFPFRN (if applicable)

1. Details of substantial holder (1)

Simon Shepherd, David J Morgan and Amy M Louise Slee and St Marks Associates Ltd as trustees of the Shepherd Name Family Settlement 2015 ( SFS Trust ) and Nicholas Parsons and Angus Collingwood-Cameron as trustees of the Suzanne Shepherd Will Trust ( SSW Trust ) (together, Relevant Parties ) ACN/ARSN/APFRN (if applicable) N/A NFPFRN (if applicable) N/A The holder became a substantial holder on 27 March 2026

2. Details of voting power

The total number of votes attached to all the voting shares or interests in the company, scheme or fund 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 Voting power (6) Fully paid ordinary shares in 19.9% (based on 224,685,996 44,712,513 MCE Shares 44,712,513 MCE Shares MCE ( MCE Shares ) MCE shares on issue)

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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:

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----- Start of picture text ----- Holder of relevant interest Nature of relevant interest (7) Class and number of securitiesThe Relevant Parties have a greater than20% interest in Advanced InnergyHoldings Limited ( AIH ).As a result of this relevant interest in AIHThe Relevant Parties 44,712,513 MCE Sharesunder section 608(3)(a) of theCorporations Act 2001 (Cth)( Corporations Act ) the Relevant Partiesare deemed to have a relevant interest inMCE Shares.The persons registered as holders of the securities referred to in paragraph 3 above are as follows:Class andHolder of relevant Registered holder of Person entitled to be number ofinterest securities registered as holder (8) securitiesLempip Nominees Pty Ltd as 11,449,946 MCEtrustee for the Lempip SharesSuperannuation FundThe Relevant Parties 2,011,045 MCEClevie 2 Pty Ltd SharesAs a result of this relevant interestin AIH under section 608(3)(a) ofthe Corporations Act the Relevant 7,518,176 MCEParties are deemed to have a Impulse Pty Ltd as trustee for Advanced Innergy Solutions Sharesrelevant interest in MCE Shares. Adams Lee Family Trust Australia Pty LtdRefer to AIH Form 603 to MCE onthe ASX dated 31 March 2026 for Somar Management Pty Ltd as 15,150,000 MCEtrustee for Somar Global Fund Sharesmore information.8,583,346 MCEBell Potter Nominees Limited as Sharescustodian for Collins St AssetManagement Pty Ltd----- End of picture text -----

4. Details of present registered holders

The persons registered as holders of the securities referred to in paragraph 3 above are as follows:

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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 relevantinterestDate of acquisitionConsideration (9)Class andnumber ofsecuritiesCashNon-cashThe Relevant Parties27 March 2026NILThe Relevant Parties have agreater than 20% interest in AIH.As a result of this relevant interestin AIH under section 608(3)(a) ofthe Corporations Act the RelevantParties are deemed to have arelevant interest in MCE Shares.44,712,513 MCEShares

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6. Associates

The reasons the persons named in paragraph 3 above are associates of the substantial holder are as follows:

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----- Start of picture text ----- Name and ACN/ARSN/APFRN (ifapplicable) and NFPFRN (if Nature of associationapplicable)N/A N/A7. AddressesThe addresses of persons named in this form are as follows:Name AddressGrindstone Mill, Alderley, Wotton Under Edge, Gloucestershire, GL12 7QT, UnitedSimon ShepherdKingdomDavid J Morgan and Amy M Louise Sleeand St Marks Associates Ltd as trustees8 St George's Street, Douglas IM1 1AH, Isle of Manof the Shepherd Family Settlement2015Nicholas Parsons and AngusGrindstone Mill, Alderley, Wotton Under Edge, Gloucestershire, GL12 7QT, UnitedCollingwood-Cameron as trustees of theKingdomSuzanne Shepherd Will TrustSignatureAuthorisedprint name Simon Shepherd capacity representative----- End of picture text -----

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Simon ShepherdcapacityAuthorisedrepresentativedate31 March 2026DIRECTIONSntial holders with similar or related relevant interests (eg. A corporation and its related corporations, or the manager andames could be included in an annexure to the form. If the relevant interests of a group of persons are essentially similar,hout the form as a specifically named group if the membership of each group, with the names and addresses of membersof the form." in section 9 of the Corporations Act 2001.nterest" in sections 608 and 671B(7) of the Corporations Act 2001.y constitute one class unless divided into separate classes.hed to all the voting shares or interests in the company, scheme or fund (if any) that the person or an associate has a, scheme or fund multiplied by 100.nt or other circumstances by which the relevant interest was acquired. If subsection 671B(4) applies, a copy of anyhe terms of any relevant agreement, and a statement by the person giving full and accurate details of any contract,nt, must accompany this form, together with a written statement certifying this contract, scheme or arrangement; andpower of a person to exercise, control the exercise of, or influence the exercise of, the voting powers or disposal of therelevant interest relates (indicating clearly the particular securities to which the qualification applies).greement" in section 9 of the Corporations Act 2001.

• (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 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 or interests in the company, scheme or fund (if any) that the person or an associate has a relevant interest in.

• (6) , scheme or fund 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.

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• (8) If the substantial holder is unable to determine the identity of the person (eg.

• (9) Details of the consideration must include any and all benefits, money and otherwise, 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.

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