Immuron Ltd — Capital/Financing Update 2011

Aug 23, 2011

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24 August 2011

ABN: 80 063 114 045 Level 1, 39 Leveson Street North Melbourne, Vic 3051 Tel: +61 3 8637 1107 Fax: +61 3 9328 1675 www.immuron.com

MR SAM SAMPLE 123 SAMPLE STREET 123 SAMPLE STREET 123 SAMPLE STREET SAMPLETOWN VIC 3000 SAMPLETOWN VIC 3000

Dear Option holder

NON-RENOUNCEABLE PRO-RATA RIGHTS ISSUE OFFER

Immuron Limited (the Company) hereby notifies you, in accordance with the terms and conditions on which the options were issued, that it has announced to the ASX, that it intends to make a non-renounceable prorata rights offer to the Company’s shareholders (the Offer).

Under the terms of the Offer each eligible shareholder will have the right to subscribe for New Shares in the Company on the basis of one (1) New Share for every five (5) fully paid ordinary shares held in the Company as at 5.00pm AEST on 31 August 2011 (this date is the anticipated Record Date and is subject to change). In addition to the New Shares issued, for no additional consideration, one (1) attaching Option will be issued for every three (3) New Shares issued. The New Shares will be issued at a price of seven cents ($0.07) per New Share, and the Options will be exercisable at twelve cents ($0.12) per Option at any time before 5.00pm AEST on 15 December 2013. Eligible shareholders will also have the right to participate in a Top Up Offer if there is a shortfall in the rights issue.

The Offer will only be made to eligible shareholders with registered addresses in Australia, New Zealand and Israel on the Record Date. To the extent that you exercise all or part of the options currently held by you in the Company before the Record Date, and continue to hold the shares resulting from the exercise of the options on the Record Date, you will be entitled to participate under the Offer with respect to those shares issued from the exercise of the options.

If you wish to exercise all or any of the options currently held by you please complete the attached Exercise of Options form. Using the enclosed reply paid envelope, forward the completed form together with your cheque made payable to “Immuron Limited” for the number of options exercised at the exercise price of ten cents (A$0.10) per Option to the following address:

Immuron Limited Computershare Investor Services Pty Limited GPO Box 52 Melbourne Vic 3001 Australia

Yours faithfully

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Graeme Stevens Company Secretary

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