Immuron Ltd — Regulatory Filings 2012

May 17, 2012

Immuron

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

18 May 2012

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

Dear Sir

Extension of Share Purchase Plan (SPP) and share crossing

On 23 April 2012 the Company announced an underwritten SPP for all eligible shareholders with the intention of raising up to a minimum of \$1.0 million. The original closing date of the Plan was Wednesday 23 May 2012 which was seven days prior to the general meeting of shareholders to be held on 31 May 2012.

The SPP was implemented to provide existing shareholders with the opportunity to purchase shares at the same issue price as the recent Placement, without brokerage costs, prior to the record date for the bonus issue of options on 23 July 2012.

Given that the resolutions being put at that meeting have a bearing on the SPP, the Board has decided to extend the closing date of the SPP to close at 7pm Melbourne time on 8 June 2012, with the consequential extensions to the proposed timetable as described below. The terms of the SPP otherwise remain unchanged.

This extension provides shareholders with the benefit of having full knowledge of the outcome of the meeting and being provided with an update at the meeting by the Chief Operating Officer, Joe Baini, on the Company's current operations and expected outcomes in the coming 12 months.

The Company has been advised by Patersons Securities Limited that the Underwriting Agreement for the first \$1.0 million of the SPP will be extended to the revised closing date and otherwise the terms of the underwriting remain unchanged, including usual industry termination rights for example where there is material change in market conditions or Immuron's share price.

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

Shareholder Meeting to approve Tranche 31 May 2012 2 Placement, options for tranche 1 and Tranche 2 subscribers and SPP shares and underwritten shares SPP Closes 8 June 2012 15 June 2012 Allotment of shares pursuant to SPP Dispatch of holding statements for 19June 2012 shares issued pursuant to SPP

The Company is also aware that a large shareholding was sold yesterday to clients of Patersons Securities Limited. Immuron warmly welcomes these shareholders to its register at what we believe is an exciting period for the

Yours faithfully

Graeme Stevens Company Secretary.