The document presents the key financial results of CTEEP for the first quarter of 2011. It shows that net operating revenue increased 35.7% year-over-year to R$607 million due to increases in construction, operations and maintenance revenues. EBITDA grew 16.2% to R$317.2 million, while net income declined slightly by 0.5% to R$205.8 million. The company's capital structure and market performance are also summarized, including details of debt levels and trading volumes on the stock exchange in the quarter.