MARITANA MINERALS LIMITED — Proxy Solicitation & Information Statement 2022

Oct 23, 2022

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24 October 2022

Dear Shareholders

Addendum to Notice of General Meeting

Horizon Minerals Limited ( Horizon or the Company ) advises that the Company has prepared the following Addendum to the notice of meeting for the general meeting of the Company to be held on 17 November 2022 at 2pm (AWST) at 163-167 Stirling Highway, Nedlands, Western Australia ( Notice of Meeting ).

The Addendum is intended to provide Horizon shareholders ( Shareholders ) with additional disclosure in relation to the proposed Capital Reduction and In-specie Distribution the subject of the Notice of Meeting.

Yours sincerely,

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Julian Tambyrajah Chief Financial Officer & Company Secretary Horizon Minerals Limited

horizonminerals.com.au

163 Stirling Hwy Nedlands WA 6009

ACN 007 761 186 ABN 88 007 761 186

PO Box 1104 Nedlands WA 6909

T: +61 8 9386 9534 E: info@horizonminerals.com.au

Proxy Forms

The Company confirms that there have been no changes to the Proxy Form previously dispatched to Shareholders. Shareholders are advised that:

• (a) If you have already completed and returned the Proxy Form which was provided with the original Notice of Meeting and you wish to change your vote, you must complete and return a new Proxy Form. Please contact the Company if you require a new Proxy Form.

• (b) If you have already completed and returned the Proxy Form which was provided with the original Notice of Meeting and you do not wish to change your vote, you do not need to take any action as the earlier submitted Proxy Form will be accepted by the Company unless you submit a new Proxy Form.

• (c) If you have not yet completed and submitted the Proxy Form and you wish to vote on the Resolution in the Notice of Meeting, please complete and return the Proxy Form.

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Addendum to Notice of General Meeting

Horizon Minerals Limited ( Company ) hereby gives notice to Shareholders that, in relation to the Notice of General Meeting and Explanatory Memorandum dated 17 October 2022 in respect of the general meeting of the Company to be held at 2pm (AWST) on 17 November 2022 at 163-167 Stirling Highway, Nedlands, Western Australia ( Meeting ), the Directors have resolved to supplement the information contained in the Notice of Meeting and Explanatory Memorandum as set out below.

Capitalised terms used in this Addendum are as defined in the Notice of Meeting and Explanatory Memorandum, unless expressly defined otherwise.

Richmond Vanadium Technology Limited (ACN 617 799 738) ( RVT ) has lodged a supplementary prospectus dated 21 October 2022 with ASIC pursuant to section 719(1) of the Corporations Act ( Supplementary Prospectus ). The Supplementary Prospectus is set out in Attachment A to this Addendum.

The Supplementary Prospectus supplements and is intended to be read together with the prospectus dated 14 October 2022 that was lodged by RVT with ASIC on that date ( Prospectus ). As a consequence, references in the Notice of Meeting and Explanatory Memorandum to the “ RVT Prospectus ” are to be read as a reference to the Prospectus as supplemented by the Supplementary Prospectus.

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Attachment A – Supplementary Prospectus

Supplementary Prospectus starts on the following page.

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Richmond Vanadium Technology Limited ACN 617 799 738 ( Company )

Supplementary Prospectus

Supplementary Prospectus to a Prospectus dated 14 October 2022

Important Information

This supplementary prospectus is dated 21 October 2022 and was lodged with the ASIC pursuant to Section 719(1) of the Corporations Act on that date ( Supplementary Prospectus ).

This Supplementary Prospectus supplements and is intended to be read together with the prospectus dated 14 October 2022 ( Prospectus ) which was issued by Richmond Vanadium Technology Limited ACN 617 799 738 ( Company ). This document is important and should be read in its entirety in conjunction with the Prospectus. If you are in any doubt as to the contents of this document, you should consult your professional advisers without delay.

ASIC, ASX Limited ( ASX ), and their officers take no responsibility as to the contents of this Supplementary Prospectus.

The Company has issued an electronic version of this Supplementary Prospectus and the Prospectus. Electronic versions of both may be accessed at https://richmondvanadium.com.au/

Other than as set out below, all details in relation to the Prospectus remain unchanged. Unless otherwise indicated, terms used in this Supplementary Prospectus have the same meaning as ascribed to them in the Prospectus. To the extent of any inconsistency between this Supplementary Prospectus and the Prospectus, the provisions of this Supplementary Prospectus will prevail.

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1. Background

This Supplementary Prospectus has been prepared to make the amendments to the Prospectus as set out in Section 2 below.

2. Updates to Prospectus

2.1 Section 1

On page 10 of the Prospectus, subsection “(a)” after the words “ RVT has a clear focus to: ” is deleted in its entirety and replaced with the following:

“ (a) unlock the potential of our world class clean green focussed vanadium deposit and deliver greater value through downstream processing in Australia;”

2.2 Sections 3.5 and 3.6

On page 35 of the Prospectus, footnote 9 is deleted in its entirety, and on page 36 of the Prospectus, footnote 10 is deleted in its entirety, and in both cases replaced with:

“ This source is cited in reliance on ASIC Corporations (Consents to Statements) Instrument 2016/72” .

2.3 Section 4.2

On page 38 of the Prospectus, in Section 4.2, the following sentence is inserted at the end of the paragraph:

“ A key focus of the BFS will be to continue to assess clean energy solutions and seek to reduce the carbon footprint of the Project. The PFS did not assess whether to incorporate clean energy solutions to reduce the carbon footprint of the Project or other carbon abatement strategies, however a key focus on the BFS will be to do so and this future work will inform the ” Company’s clean green focus .

2.4 Section 4.3(c)

On page 39 of the Prospectus, the section heading is deleted in its entirety and replaced with the following:

“ Lower carbon footprint compared to titanomagnetite deposits due to easy mining and processing”

2.5 Section 4.6(b)

On page 42 of the Prospectus, in Section 4.6(b) the following sentence is inserted at the end of the last paragraph:

“ As part of the BFS the Company will continue to assess tying into the Copperstring 2.0 project and will also assess significantly reducing the reliance on the grid system by integrating hybrid renewable power systems, including the feasibility of wind, tracking solar PV as well as stand alone battery energy storage systems” .

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3. Other Material Information

The Directors of the Company are not aware of any acts, matters or things (not already described in the Prospectus) which may be material to the making of and informed assessment of the effect of the Offer on the Company or the rights attaching to the Shares.

The Company confirms that as at the date of this Supplementary Prospectus, the Company has not received any applications for Shares. This Supplementary Prospectus has been signed by a Director of Richmond Vanadium Technology Limited ACN 617 799 738 with the authority of each of the Directors and is dated 21 October 2022. Each Director has consented to the lodgement of this Supplementary Prospectus with ASIC.

...........................………………………… Independent Non-Executive Chair, Mr Brendon Grylls

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