IMDEX LIMITED — Earnings Release 2011

Oct 13, 2010

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14 October 2010

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

Dear Sir/Madam

Trading Update - First Quarter FY11

Please find attached an announcement providing a trading update for the first quarter of FY11.

Yours faithfully Imdex Limited

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Paul Evans Company Secretary

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14 October 2010

TRADING UPDATE IMDEX REPORTS STRONG 1Q11 PERFORMANCE

Imdex Limited (ASX: IMD) is pleased to announce that it has performed strongly over the first quarter of the 2011 financial year (1Q11). Imdex is scheduled to hold its 2010 Annual General Meeting at 11am (WST) today. The meeting will include information on the Company’s performance over 1Q11 along with a review of FY10 results previously announced to the market.

The headline unaudited results for 1Q11 are:

• Revenue up 59% to $46.9 million (1Q10: $29.5 million), comprising:

  • Drilling Fluids and Chemicals Division revenue up 50% to $30.8 million (1Q10: $20.4 million)

  • Down Hole Instrumentation Division revenue up 77% to $16.1 million (1Q10: $9.1 million)

• EBITA up significantly to $11.3 million (1Q10: $4.2 million)

Imdex’s unaudited result for 1Q11 was a strong one. Revenue of $46.9 million is a new quarterly record for the Company and exceeds the previous quarterly high of $43.2 million in 1Q09 which was prior to the global financial crisis. The oil & gas market contributed 15% of revenues for the Quarter.

The strong revenue generated by the Minerals Division reflects the rebound in global drilling activity and an increase in mineral exploration expenditure. Metals Economics Group, Canada, indicated in late September 2010 that due to buoyant commodity prices and increased liquidity, they expected 2010 non ferrous exploration expenditure to be up by more than 44% (after the 42% decline experienced in 2009).

EBITA of $11.3 million also represents a recovery due to robust business activity that occurred in all four major mining regions, namely Asia Pacific, Africa, Canada and Latin America.

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Recent acquisition, Fluidstar a lso made a positive contribution to revenue and EBITA in the month of September 2010.

Commenting on the first quar t er performance, Imdex’s Managing Director Bernie Ridgeway said, “The Directors are plea s ed with the first quarter results as they dem o nstrate the leading nature of Imdex’s pro d ucts as well as the strength of its business m odel. While commodity prices and activit y levels in both the minerals and oil & gas se c tors are strong at the current time, we are well a ware of the concerns that remain about the global economic situation and that there is still potential for a number of issues to have a n egative effect on the demand for commodities. However, we remain cautiously optimistic about the balance of FY11 and continue to expl o re opportunities to grow the business both o rganically and through acquisitions.”

Ross Kelly

Imdex Limited, Chairman

For further information , ple a se contact:

Bernie Ridgeway, Managing Director Ross Kelly, Chairman Paul Evans, Chief Financial O fficer and Company Secretary Ph: +61 8 9445 4010 Email: imdex@imdexlimited. c om

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