Morgan Stanley Infrastructure Partners (MSIP) has agreed to sell its majority stake in Seven Seas Water Group to EQT Infrastructure VI, marking a significant exit from the North American water and wastewater sector.

Seven Seas Water, which operates more than 220 plants across the United States, the Caribbean, and Latin America, delivers outsourced water and wastewater services through its Water-as-a-Service® (WaaS®) model. The business serves a diverse customer base, including municipalities, industrial clients, and hospitality operators, under long-term, inflation-linked contracts that ensure stable cashflows.

Since acquiring the company via a corporate carve-out, MSIP has scaled Seven Seas into the leading North American WaaS® platform. Under MSIP’s ownership, the firm expanded its footprint, particularly in Texas, secured major long-term agreements, and delivered several key infrastructure projects.

“Seven Seas Water exemplifies the infrastructure characteristics we prioritise – essential services, long-term inflation-protected cashflows, and operational excellence,” said Alberto Donzelli, Managing Director and Co-Head of Europe at MSIP.

Markus Hottenrott, Chief Investment Officer at MSIP, added: “Seven Seas Water is another example of MSIP’s differentiated ability to execute carve-outs and take-privates, and build institutional-grade platforms through active management.”

Seven Seas offers seawater reverse osmosis and advanced purification solutions, alongside scalable wastewater treatment technologies. The company’s Houston-based subsidiary, AUC Group, delivers modular and field-erected treatment systems for clients across water-stressed geographies.

This transaction reflects MSIP’s strategic focus on infrastructure assets that deliver essential services with resilient, inflation-linked returns. Terms of the deal were not disclosed, and the transaction is subject to customary closing conditions.

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