Exhibit 99.1

Appendix 2A - Application for quotation of securities

Announcement Summary

Entity name

IMMURON LIMITED

Announcement Type

New announcement

Date of this announcement

Tuesday December 16, 2025

The +securities to be quoted are:

+Securities issued, transferred or re-classified as a result of options being exercised or other +convertible securities being converted

Total number of +securities to be quoted

Refer to next page for full details of the announcement

Appendix 2A - Application for quotation of securities

Part 1 - Entity and announcement details

IMMURON LIMITED

We (the entity named above) apply for +quotation of the following +securities and agree to the matters set out in Appendix 2A of the ASX Listing Rules.

IMC

New announcement

16/12/2025

Appendix 2A - Application for quotation of securities

Part 2 - Type of Issue

+Securities issued, transferred or re-classified as a result of options being exercised or other +convertible securities being converted

Additional +securities in a class that is already quoted on ASX (“existing class”)

Appendix 2A - Application for quotation of securities

Part 3B - number and type of +securities to be quoted (existing class) where issue has not previously been notified to ASX in an Appendix 3B

Existing +securities converting into additional +securities in an existing class

FROM (Existing Class)

ASX +security code and description

IMCAE : PERFORMANCE RIGHTS

TO (Existing Class)

ASX +security code and description

IMC : ORDINARY FULLY PAID

Is this all of the options or other +convertible securities on issue of that type (ie have all of those options now been exercised or have all of those convertible securities now been converted)?

No

The right of the holder of the options or other +convertible securities to receive the +underlying securities is being satisfied by:

An issue of new +securities

The underlying +securities being received by the holder are:

Intended to be, but are not yet, quoted by ASX

Were the options being exercised or other +convertible securities being converted issued under an +employee incentive scheme?

Yes

Are any of the options being exercised or other +convertible securities being converted held by +key management personnel (KMP) or an +associate?

No

Issue date

16/12/2025

Will the +securities to be quoted rank equally in all respects from their issue date with the existing issued +securities in that class?

Yes

Appendix 2A - Application for quotation of securities

Issue details

Number of +securities to be quoted

314,843

Are the +securities being issued for a cash consideration?

No

Please describe the consideration being provided for the +securities

Please provide an estimate (in AUD) of the value of the consideration being provided per +security for the +securities to be quoted

0.000000

Any other information the entity wishes to provide about the +securities to be quoted

Appendix 2A - Application for quotation of securities

Part 4 - Issued capital following quotation

Following the quotation of the +securities the subject of this application, the issued capital of the entity will comprise:

The figures in parts 4.1 and 4.2 below are automatically generated and may not reflect the entity’s current issued capital if other Appendix 2A, Appendix 3G or Appendix 3H forms are currently with ASX for processing.

4.1 Quoted +securities (total number of each +class of +securities quoted on ASX following the +quotation of the +securities subject of this application)

4.2 Unquoted +securities (total number of each +class of +securities issued but not quoted on ASX)