EXHIBIT 99.1 (INSITUFORM-TECH)(INSU) Insituform Technologies, Inc. Reports $0.13 Earnings Per Share for Third Quarter 2004; Revenues Increase 23% Chesterfield, MO - October 28, 2004 - Insituform Technologies, Inc. (Nasdaq National Market: INSU) (the "Company") today reported third quarter 2004 earnings of $3.5 million, or $0.13 per diluted share, compared to $3.3 million, or $0.12 per diluted share, for the same period last year. Revenues increased 23.4% to $144.8 million for the third quarter of 2004 from $117.4 million in the same period last year. This reflects growth in tunneling and several regional rehabilitation business units along with the impact of 2003 acquisitions. Year-to-date revenues increased 13.6% to $415.2 million from $365.5 million in the same period last year. As with third quarter revenues, this was principally due to the effect of acquisitions and growth in certain North American CIPP regions, as well as in Europe, Tite Liner (R) and tunneling. Year-to-date earnings were $7.2 million, or $0.27 per diluted share, in 2004 compared to $14.5 million, or $0.55 per diluted share, in the first nine months of 2003. Gross profit increased 10.4% to $30.3 million in the third quarter of 2004 from $27.4 million in the third quarter of 2003. Gross profit margin for the quarter for the Company's rehabilitation and Tite Liner segments increased from 24.5% to 25.2% and from 30.7% to 35.1%, respectively, compared with the third quarter of 2003. Gross profit margin for the tunneling segment declined from 16.8% to 6.3% in the third quarter of 2004 compared with the same period in 2003, primarily as a result of project performance issues described below. Gross profit margin for the Company as a whole declined from 23.4% to 20.9% due to the tunneling segment's performance. For the first nine months of 2004, gross profit increased 1.5% to $86.2 million from $85.0 million for the same period in 2003. The above performance was achieved despite some unexpected challenges during the quarter. A major tunneling job experienced a reduction in gross profit of $3.7 million ($2.2 million after tax). While this project is expected to remain profitable to the Company, it experienced a downward adjustment as a result of revisions to original estimates and production delays. Partially offsetting this performance in tunneling were the favorable resolutions of several claims in the ordinary course of business. The Company's operations in the southeast United States were interrupted by the four hurricanes that struck the region in the third quarter. The combination of deferred work and idled crew downtime costs resulted in an estimated $0.9 million ($0.5 million after tax) of unfavorable impact to gross profit. Third quarter 2004 operating expenses increased 13.0% to $22.2 million from $19.6 million in the third quarter of 2003. For the first nine months of 2004, operating expenses increased 20.6% to $67.2 million from $55.7 million for the same period last year. The higher level of operating expenses is consistent with management's emphasis on key initiatives in the areas of growth, technological innovation and operational excellence. The higher costs are primarily in the areas of compensation and employee related costs combined with increased professional and consulting fees. Acquisitions made in 2003 also added $0.7 million and $3.3 million, respectively, to operating expenses in the third quarter and first nine months of 2004. Interest and other expense was $2.2 million in the third quarter of 2004, compared to $2.1 million in the third quarter of 2003. Year to date, interest and other expense increased 29.6% to $6.7 million from $5.2 million a year ago, which reflects the placement of $65.0 million in Senior Notes in April 2003, causing higher interest expense during the first nine months of 2004 compared to the same period of 2003. The Company's unrestricted cash position was $77.7 million at September 30, 2004 compared to $93.9 million at December 31, 2003. Importantly, this is after the Company made $18.9 million in debt repayments and $25.5 million in capital expenditures during the nine-month period ended September 30, 2004. Capital expenditures in the first nine months of 2003 were $12.6 million. The Company's cash position at September 30, 2004 was also impacted by $3.0 million received from the exercise of stock options, and $9.1 million in tax refunds received earlier this year. The Company will host a conference call at 9:30 a.m. EDT on Friday, October 29. The call can be accessed by clicking on the Presentations tab on the Investor Relations page of the Company's Web site (www.insituform.com) or by using the following link: http://www.shareholder.com/insituform/MediaList.com. An audio archive of the webcast will be available approximately two hours after the call through www.insituform.com. The archive will be available for one week. Insituform Technologies, Inc. is a leading worldwide provider of proprietary technologies and services for rehabilitating sewer, water and other underground piping systems without digging and disruption. More information about the Company can be found on its Internet site at www.insituform.com. This news release contains forward-looking statements, which are inherently subject to risks and uncertainties that could cause actual results to differ materially from those projected. Factors which could affect results include, among others, the competitive environment for the Company's products and services, the geographical distribution and mix of the Company's work, and other factors set forth in reports and documents filed by the Company with the Securities and Exchange Commission from time to time. The Company does not assume a duty to update forward-looking statements. Please use caution and do not place reliance on forward-looking statements. INSITUFORM TECHNOLOGIES, INC. CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (In thousands, except per share amounts) <Table> <Caption> For the Three Months For the Nine Months Ended September 30, Ended September 30, 2004 2003 2004 2003 Revenues $ 144,821 $ 117,360 $ 415,169 $ 365,486 Cost of revenues 114,545 89,941 328,962 280,531 Gross profit 30,276 27,419 86,207 84,955 Selling, general and administrative 22,201 19,648 67,167 55,713 Operating income 8,075 7,771 19,040 29,242 Other (expense) income: Interest expense (2,318) (2,391) (7,113) (5,763) Other 102 331 389 573 Total other expense (2,216) (2,060) (6,724) (5,190) Income before taxes on income 5,859 5,711 12,316 24,052 Taxes on income 2,268 2,228 4,931 9,381 Income before minority interests, equity in earnings and discontinued operations 3,591 3,483 7,385 14,671 Minority interests (65) (84) (166) (144) Equity in earnings of affiliated companies 0 101 (35) 201 Income from continuing operations 3,526 3,500 7,184 14,728 Loss from discontinued operations -- (215) -- (231) Net income $ 3,526 $ 3,285 $ 7,184 $ 14,497 Earnings per share: Basic: Income from continuing operations $ 0.13 $ 0.13 $ 0.27 $ 0.56 Loss from discontinued operations -- (0.01) -- (0.01) Net income $ 0.13 $ 0.12 $ 0.27 $ 0.55 Diluted: Income from continuing operations $ 0.13 $ 0.13 $ 0.27 $ 0.56 Loss from discontinued operations -- (0.01) -- (0.01) Net income $ 0.13 $ 0.12 $ 0.27 $ 0.55 Weighted average common shares - basic 26,698 26,451 26,624 26,475 Weighted average common and equivalent shares - diluted 26,840 26,638 26,763 26,593 </Table> <Table> SEGMENT DATA Revenues Rehabilitation $ 102,924 $ 89,456 $ 303,178 $ 275,706 Tunneling 35,963 22,611 93,158 74,581 Tite Liner(R) 5,934 5,293 18,833 15,199 Total revenues $ 144,821 $ 117,360 $ 415,169 $ 365,486 Gross profit Rehabilitation $ 25,935 $ 22,005 $ 70,997 $ 70,478 Tunneling 2,255 3,791 8,638 9,725 Tite Liner(R) 2,086 1,623 6,572 4,752 Total gross profit $ 30,276 $ 27,419 $ 86,207 $ 84,955 Operating income Rehabilitation $ 7,309 $ 5,090 $ 14,400 $ 22,493 Tunneling (303) 1,876 1,028 4,293 Tite Liner(R) 1,069 805 3,612 2,456 Total operating income $ 8,075 $ 7,771 $ 19,040 $ 29,242 </Table> INSITUFORM TECHNOLOGIES, INC. CONSOLIDATED CONDENSED BALANCE SHEETS (Unaudited) (In thousands) <Table> <Caption> September 30, 2004 December 31, 2003 ASSETS CURRENT ASSETS Cash and cash equivalents $ 77,678 $ 93,865 Restricted cash 1,062 6,126 Receivables, net 95,616 90,814 Retainage 27,144 24,902 Costs and estimated earnings in excess of billings 40,012 27,853 Inventories 15,902 12,935 Prepaid expenses and other assets 12,289 19,515 Assets held for disposal -- 1,263 TOTAL CURRENT ASSETS 269,703 277,273 PROPERTY, PLANT AND EQUIPMENT, less accumulated depreciation 86,531 75,667 OTHER ASSETS Goodwill 131,558 131,613 Other assets 22,949 23,807 TOTAL OTHER ASSETS 154,507 155,420 TOTAL ASSETS $ 510,741 $ 508,360 LIABILITIES AND STOCKHOLDERS' EQUITY CURRENT LIABILITIES Current maturities of long-term debt and line of credit $ 15,856 $ 16,938 Accounts payable and accrued expenses 89,762 82,670 Billings in excess of costs and estimated earnings 9,995 8,495 Liabilities related to discontinued operations -- 1,770 TOTAL CURRENT LIABILITIES 115,613 109,873 LONG-TERM DEBT, less current maturities 96,528 114,323 OTHER LIABILITIES 3,501 3,530 TOTAL LIABILITIES 215,642 227,726 MINORITY INTERESTS 1,640 1,465 TOTAL STOCKHOLDERS' EQUITY 293,459 279,169 TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY $ 510,741 $ 508,360 </Table> INSITUFORM TECHNOLOGIES, INC. CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (In thousands) <Table> <Caption> For the Nine Months Ended September 30, 2004 2003 Cash flows from operating activities: Net income $ 7,184 $ 14,497 Loss from discontinued operations -- 231 Income from continuing operations 7,184 14,728 Adjustments to reconcile net cash provided by operating activities: Depreciation 12,149 11,213 Amortization 1,570 1,005 Deferred income taxes 430 (30) Loss on disposal of assets 717 518 Write-off of deferred financing fees 226 -- Loss (income) from equity investments 35 (201) Minority interest in net income 166 144 Restructuring charge -- (261) Other 3,759 2,037 Changes in operating assets and liabilities: Change in restricted cash related to operating activities 462 143 Receivables, including costs and estimated earnings in excess of billings (18,359) 2,451 Inventories (2,966) (415) Prepaid expenses and other assets 7,591 (3,693) Accounts payable and accrued expenses 6,822 (1,065) Net cash provided by operating activities of continuing operations 19,786 26,574 Net cash used by operating activities of discontinued operations -- (1,558) Net cash provided by operating activities 19,786 25,016 Cash flows from investing activities: Capital expenditures (25,521) (12,573) Proceeds from the sale of fixed assets 1,904 780 Purchases of businesses, net of cash acquired -- (6,337) Other investing activities (844) 1,406 Net cash used in investing activities (24,461) (16,724) Cash flows from financing activities: Proceeds from the issuance of common stock 3,042 557 Purchases of treasury stock -- (1,597) Principal payments on long-term debt (18,914) (22,734) Issuance of long-term debt -- 65,000 Increase (decrease) in line of credit -- (25,835) Change in restricted cash related to financing activities 4,602 (4,600) Deferred financing charges (633) (692) </Table> <Table> Net cash (used) provided in financing activities (11,903) 10,099 Effects of exchange rates on cash 391 673 Net increase (decrease) in cash and cash equivalents (16,187) 19,064 Cash and cash equivalents, beginning of period 93,865 71,401 Cash and cash equivalents, end of period 77,678 90,465 </Table> CONTACT: Insituform Technologies, Inc. Christian G. Farman, Vice President and CFO (636) 530-8000