IMDEX LIMITED — Interim / Quarterly Report 2012

Oct 19, 2011

20 October 2011

Company Announcements Office ASX Limited Exchange Centre 20 Bridge Street SYDNEY NSW 2001

Dear Sir/Madam

Trading Update - First Quarter FY12

Please find attached an announcement re the first quarter for FY12 trading update.

Yours faithfully

Imdex Limited

Paul Evans Company Secretary

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20 October 2011

IMDEX GENERATES RECORD QUARTERLY PERFORMANCE

Imdex Limited (ASX: IMD) is pleased to announce that it has performed strongly over the first quarter of the 2012 financial year (1Q12), generating record quarterly financial results.

The Company’s headline unaudited results for 1Q12 were:

• Revenue up 54% to $72.3 million (1Q11: $46.9 million), comprising:

• Record Minerals Division revenue of $65.0 million, up 62.5% (1Q11: $40.0 million)

• Oil & Gas Division revenue up 6% to $7.3 million (1Q11: $6.9 million)

• Record EBITA up 87% to $21.1 million (1Q11: $11.3 million).

Commenting on the Company’s record first quarter performance, Imdex’s Managing Director Bernie Ridgeway said, “The Directors are very pleased with the record first quarter results as they clearly demonstrate the leading nature of Imdex’s products, driven by the continued investment in research and product development. These results also highlight the strength of the Company’s global business model and customer relationships, with Imdex growing its market share in all of the global regions that the Company operates.”

Revenue of $72.3 million was a new quarterly record for the Company, exceeding the previous high of $60.0 million in 4Q11 by 20%.

The record quarterly revenue generated by the Minerals Division of $65.0 million reflected continued robust drilling activity and increased mineral exploration expenditure globally. Metals Economics Group (MEG), Canada indicated in mid September 2011 that they expected calendar 2011 non ferrous expenditure to be up by circa 50% on 2010 levels and a new all time high at US$17 billion. MEG also commented that despite

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a sharp rise in the amount of money planned for grassroots work in 2011, the proportion of the overall industry exploration effort committed to long term project generation is anticipated to remain at about one third of 2011’s total.

Oil & Gas Division revenue was $7.3 million. This does not include revenue from DHSO Joint Venture due to the equity accounting of this investment and therefore no revenue is included for the down hole instrumentation business during the period.

EBITA of $21.1 million was a record, and up on the previous high of $14.9 million generated in 4Q11. The very strong growth in EBITA reflected:

• continued recovery in margins due to additional fixed cost leverage

• continued growth in the Reflex rental fleet as a result of ongoing investment in product development

• market share growth underpinned by robust business activity in all four major mining regions of Asia Pacific, Africa, Canada and Latin America.

Commenting on the outlook for the remainder of the 2012 financial year, Mr. Ridgeway said, “While activity levels in both the minerals and oil & gas sectors are currently strong, we are alive to the potential for global economic concerns to impact the demand for commodities. Nevertheless we are optimistic about FY12 and continue to progress a range of initiatives to grow the business both organically and through bolt-on acquisitions.”

Imdex is holding its 2011 Annual General Meeting at 1.00pm (WST) today.

About Imdex

Imdex is a Perth based public company listed on the Australian Securities Exchange, whose core business is the supply of drilling fluids and chemicals and down hole instrumentation in Australia and internationally to the oil & gas, mining, water well, horizontal directional drilling and civil industries

For further information, please contact: Bernie Ridgeway , Managing Director; Paul Evans , Chief Financial Officer and Company Secretary +61 (0)8 9445 4010

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