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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
353020	Insituform Technologies Inc	INSU	Water, Sewer, Pipeline, Comm & Power Line Construction (1623)	133032158

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1467058	R. Charles Gordon	C/O Insituform Technologies, Inc. 17988 Edison Avenue Chesterfield MO 63005-3700		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2011-05-12	350	$25.93	350	No	4	P	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Deferred Stock Units	12,025	Direct

Footnotes

Each Deferred stock unit ("DSU") represents the issuer's obligation to transfer one share of Class A common stock, $.01 par value per share ("Common Stock"), in accordance with the terms of the deferred stock unit agreement pursuant to which the DSUs were granted. The DSUs were granted under the issuer's 2006 Non-Employee Director Equity Incentive Plan, and are immediately vested upon grant. Promptly following termination of the undersigned's service on the issuer's Board of Directors or, at the undersigned's election, a specified distribution date, the issuer will distribute to the undersigned shares of Common Stock equal to the number of DSUs reflected in the undersigned's account at such time.