HYDROCARBON DYNAMICS LIMITED — Share Issue/Capital Change 2026

Mar 26, 2026

Appendix 3A.3 - Notification of security consolidation or split

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Announcement Summary

Entity name HYDROCARBON DYNAMICS LIMITED Applicable security for the reorganisation HCD ORDINARY FULLY PAID Announcement Type New Announcement Date of this announcement

27/3/2026

Reorganisation type

Security consolidation Trading in the post consolidation or split +securities commences on a deferred settlement basis 30/4/2026 Record Date 1/5/2026

Issue Date 8/5/2026 Refer to below for full details of the announcement

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Appendix 3A.3 - Notification of security consolidation or split

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Announcement Details

Part 1 - Entity and announcement details

1.1 Name of +Entity HYDROCARBON DYNAMICS LIMITED 1.2 Registered Number Type Registration Number ABN 75117387354 1.3 ASX issuer code HCD 1.4 The announcement is New announcement 1.5 Date of this announcement 27/3/2026 1.6 Securities affected by the consolidation or split ASX +Security Code ASX +Security Description HCD ORDINARY FULLY PAID

Part 2 - Approvals

• 2.1 Are any of the below approvals required for the consolidation or split before business day 0 of the timetable? Security holder approval Court approval Lodgement of court order with +ASIC ACCC approval FIRB approval

• Another approval/condition external to the entity required to be given/met before business day 0 of the timetable for the consolidation or split.

Yes

2.2 Approvals

Approval/Condition	Date for determination	Is the date estimated or	Approval
+Security holder approval	28/4/2026	actual?	received/condition met?
		Actual

Comments

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Appendix 3A.3 - Notification of security consolidation or split

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Part 3 - Consolidation or split timetable and details

3.1 +Record date

1/5/2026

3.2 Date of +security holder meeting

28/4/2026

3.2a Effective date of consolidation or split

28/4/2026

3.3 Last day for trading in the pre consolidation or split +securities

29/4/2026

3.4 Trading in the post consolidation or split +securities commences on a deferred settlement basis.

30/4/2026

3.5 Record date

1/5/2026

3.6 First day for entity to update its register and to send holding statements to +security holders reflecting the change in the number of +securities they hold.

4/5/2026

3.7 Last day for entity to update its register and send holding statements to +security holders reflecting the change in the number of +securities they hold and to notify ASX that this has occurred. (+Issue Date)

8/5/2026

3.8 Trading starts on a normal T+2 basis

11/5/2026

3.9 First settlement of trades conducted on a +deferred settlement basis and on a normal T+2 basis

13/5/2026

Part 4 - Event type and details

4.1 The event is

+Security consolidation

4.1a Consolidation ratio: the +securities will be consolidated on the basis that every

10

(pre-consolidation) +securities will be consolidated into

1

(post-consolidation) +security (/ies).

4.2 Scrip fraction rounding

Fractions rounded up to the next whole number

Part 5 - +Securities on issue before and after consolidation or split

5.1 +Securities on issue before and after the consolidation or split

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Appendix 3A.3 - Notification of security consolidation or split

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ASX +Security Code ASX +Security Description HCD ORDINARY FULLY PAID Quoted/unquoted Number on issue pre Number on issue post Estimate/Actual Quoted consolidation or split consolidation or split Estimated 1,437,479,598 143,747,960 Part 6 - Further information

6.1 Further information relating to the consolidation or split

6.2 Additional information for inclusion in the Announcement Summary

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