Immuron Ltd — Regulatory Filings 2009

Aug 3, 2009

IMMUron

ABN: 80 063 114 045 Level 1, 39 Leveson Street North Melbourne, VIC 3051 Tel: +81 3 9018 4880 Fax: +61 3 9018 4881

www.immuron.com

Tuesday, 4 August 2009

The Manager The Company Announcement Office Australian Stock Exchange Limited Sydney NSW

Dear Sir Extension of Share Purchase Plan

The Board of Immuron Limited (ASX: IMC, OTCQX: IMROY) has decided to further extend the closing date of the Shareholder Share Purchase Plan (SSPP) which was due to close on Friday, 7 August 2009.

The Board agreed to extend the SSPP to close at 5.00pm Melbourne time Friday, 14 August 2009.

This extension has been given to allow shareholders to assess the significance of the announcement made to the ASX on 3 August in respect of our influenza research. A number of shareholders have also requested replacement offer documentation and this extension will allow them sufficient time to receive and lodge the application forms with Computershare.

There are no changes to the terms of the offer forwarded to shareholders on 18 June 2009, and no further action is required by shareholders who have already accepted the SSPP offer.

The revised timetable of key dates for the SSPP will be as follows:

Allotment of shares

20 August 2009

Dispatch of holding statements

21 August 2009

Yours faithfully

Graeme Stevens Company Secretary Immuron Limited