Insituform Technologies, Inc. (Nasdaq Global Select Market: INSU) will issue its financial results for the quarter ended September 30, 2011 on Tuesday, October 25, 2011 after the close of the market.

Joe Burgess, President and Chief Executive Officer, will host a conference call on Wednesday, October 26, 2011 to discuss third quarter financial results. After opening remarks, there will be a limited question and answer period.

Any financial or statistical information presented during the call, including any non-GAAP measures, the most directly comparable GAAP measures and reconciliation to GAAP results, can be accessed by clicking on the Webcasts tab on the Investors page of Insituform’s website ( www.insituform.com) or by using the following link: http://www.insituform.com/Investors/554/webcasts.aspx

EARNINGS RELEASE:

Tuesday, October 25, 2011.

LIVE CONFERENCE CALL WEBCAST:

Wednesday, October 26, 2011, 9:30 a.m. Eastern Daylight Time.Listen-only, Toll free: 877-331-4221Listen-only, Toll: 408-940-3819Confirmation Code: 18027045

The conference call will be webcast live via the Internet on Insituform’s website ( www.insituform.com). To access the webcast connect to the website five to ten minutes prior to the scheduled time.

CONFERENCE CALL REPLAY:

An audio archive of the webcast will be available beginning approximately two hours after the conclusion of the conference call through www.insituform.com. The webcast archive is available for one week.

About Insituform Technologies, Inc.

Insituform is a global leader in infrastructure protection, providing proprietary technologies and services to protect against the corrosion of industrial pipelines and for the rehabilitation and strengthening of sewer, water, energy and mining piping systems and buildings, bridges, tunnels and waterfront structures. More information about Insituform can be found on its internet site at www.insituform.com.

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