PTR MINERALS LTD — Capital/Financing Update 2011

Aug 3, 2011

PETRATHERM LTD

Level 1, 129 Greenhill Road, Unley, South Australia 5061 Tel: +61 8 8274 5000 Fax: +61 8 8272 8141 Website www.petratherm.com.au Email admin@petratherm.com.au A.C.N. 106 806 884

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ANNOUNCEMENT TO AUSTRALIAN SECURITIES EXCHANGE

4 August 2011

ASX Limited Companies Announcement Office Electronic Lodgement System

Dear Sirs

Share Purchase Plan Notice

Petratherm Limited ( Company ) advised on 27 July 2011 that its Board of Directors had resolved to invite eligible shareholders in the Company to participate in the Company’s Share Purchase Plan ( SPP ).

The SPP entitles eligible shareholders in the Company to acquire a maximum of $15,000 worth of shares in the Company at $0.125 per share (subject to conditions). This represents a discount to the closing price of the Company’s Shares on the Australian Securities Exchange (ASX) on 26 July 2011 (the day before the announcement of the Plan) of $0.035 or 21.875%. The issue price has been calculated in accordance with ASX Listing Rule 7.2 Exception 15.

The Company advises in relation to the SPP:

1. The Company will make offers to issue shares pursuant to the SPP without disclosure to investors under Part 6D.2 of the Corporations Act 2001 ( Act ).

2. This notice is being given in accordance with ASIC Class Order [CO 09/425].

3. As at the date of this notice, the Company has complied with the provisions of Chapter 2M of the Act as they apply to the Company and section 674 of the Act.

4. As at the date of this notice, there is no excluded information (in accordance with the requirements of subsections 708A(7) and (8) of the Act).

Yours faithfully

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Donald Stephens Company Secretary