Nalco Holding Co.'s (NLC) second-quarter profit grew 3% as the water-treatment company reported revenue rose in all segments, led by paper services.

The latest results will likely be one of the last Nalco will report as a publicly traded company. Last month, cleaning-products company Ecolab Inc. (ECL) agreed to pay $5.38 billion to buy Nalco, which makes chemicals used in water treatment, pollution control and energy conservation. The deal is expected to close in the fourth quarter.

Nalco is broadly expected to benefit from economic improvements over the next few years, which would boost industrial demand for water, as well as lift energy costs, further stressing water-scarce regions. Ecolab said the deal will help the combined company address the global market for water treatment and management.

Nalco reported earnings of $58.4 million, or 42 cents a share, up from $56.7 million, or 41 cents a share, a year earlier. Excluding items, earnings rose to 47 cents a share. Sales climbed 8.2% to $1.18 billion.

Analysts surveyed by Thomson Reuters expected a per-share profit of 38 cents on revenue of $1.13 billion.

Paper services revenue rose 17%, while water services climbed 14% and energy services edged up 0.1%.

The company said its price increases are on track to fully offset raw material and freight headwinds by the end of the current quarter.

Shares closed Tuesday at $33.43 and were inactive premarket. The stock is up 4.7% so far this year.

-By John Kell and Lauren Pollock, Dow Jones Newswires; 212-416-2356; lauren.pollock@dowjones.com

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