French-headquartered Antin Infrastructure to acquire Vigor Marine Group

Paris-headquartered Antin Infrastructure Partners has reached an agreement to acquire Portland, Oregon-headquartered Vigor Marine Group from an affiliate of Lone Star Funds.

Antin says that it will partner with Vigor Marine Group to expand capacity across its five locations, and will accelerate the company’s work to innovate in the maritime sector and grow its skilled workforce to meet increasing demand.

Vigor Marine Group CEO Francesco Valente and the U.S.-based management team will continue to lead the company, ensuring continuity of leadership and execution of Vigor’s long-term strategy.

Vigor Marine Group has grown over the past two decades through organic expansion and strategic acquisitions. During Lone Star’s ownership, the company brought five separate entities under the same brand and invested over $170 million in facility improvements and technology upgrades.

Vigor Marine Group operates shipyard and fabrication facilities in Seattle, Portland, Vancouver, San Diego and Norfolk, with six dry docks and 29 berths serving government and commercial clients. The company generated nearly $1 billion in revenue in 2024 and employs approximately 2,700 workers.

Antin says that its investment commitment will focus on ensuring capacity is aligned with the growing importance of the U.S.’s Pacific seaports, upgrading advanced infrastructure and technology across all facilities, and developing workforce training programs to grow the amount of skilled labor in the maritime sector.

The acquisition marks Antin’s continued investment in U.S. infrastructure, following significant investments in the transportation, energy and digital sectors. It represents the seventh investment by the firm’s $11.8 billion Flagship Fund V, which focuses on long-term investments in established infrastructure companies in North America and Europe.

Ryan Shockley, senior partner at Antin and co-head of its New York office, commented: “We’re thrilled to be partnering with Vigor Marine Group, which represents exactly the kind of long-term investment we pursue – essential U.S. infrastructure assets that require sustained capital commitment and operational continuity. We’re focused on expanding capacity, accelerating innovation and supporting workforce development so these shipyards can continue to serve their customers reliably over the long-term. We look forward to working closely with Francesco and the U.S.-based leadership team as they continue to lead the business and execute Vigor Marine Group’s strategy.”

Francesco Valente, CEO of Vigor Marine Group, added: “As a dedicated infrastructure investor, Antin is an excellent partner for our continued evolution as a leading repair, maintenance and modernization provider in the United States. Antin takes a disciplined, long-term approach to investing in facilities, technology and workforce development to ensure operational continuity and resilience. This partnership provides the added resources we need to take the next step in our long-term strategy and comes as our U.S.-based leadership team remains fully focused on operating our business and serving our customers.”

The transaction remains subject to customary regulatory approvals and is expected to close in 2026.

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