ADS to acquire NDS in $1 billion deal, expanding stormwater and irrigation portfolio

Advanced Drainage Systems, Inc. (ADS) announced it will acquire National Diversified Sales (NDS), the water management business of Norma Group SE, in an all-cash transaction valued at approximately $1 billion.

The acquisition adds NDS’ residential water management, access boxes and irrigation solutions to ADS’ portfolio, strengthening its position as a comprehensive provider of stormwater and onsite wastewater systems. ADS leaders said the move broadens the company’s reach into retail and distributor channels, expands its addressable market into landscape irrigation and enhances resiliency with greater exposure to the residential repair and remodel segment.

NDS generated $313 million in revenue in the 12 months ending June 2025, with about 90% of sales in the U.S. The deal, approved by both companies’ boards, is expected to close in early 2026.