Key Takeaways
- • Antin Infrastructure Partners completed the acquisition of Vigor Marine Group from Lone Star Fund XI on August 17, 2026, marking the seventh investment from Antin's Flagship Fund V.
- • Vigor Marine is a Portland-based ship-repair and maintenance, repair, and overhaul (MRO) platform operating across five locations with approximately 2,700 employees and more than $1 billion in 2025 revenue.
- • The transaction represents a sponsor-to-sponsor transfer in U.S. maritime services; Antin agreed to purchase the business in February 2026 and closed following customary regulatory approvals.
- • Management continuity is preserved: CEO Francesco Valente and the U.S. management team remain in place post-close, signaling operational stability under new ownership.
- • Purchase price and transaction terms remain undisclosed, precluding calculation of entry multiples for Antin or distribution metrics for Lone Star Fund XI's exit.
Summary
Antin Infrastructure Partners has completed its acquisition of Vigor Marine Group, a scaled U.S. maritime services platform, from an affiliate of Lone Star Fund XI. The transaction closed on August 17, 2026, following an agreement announced in February 2026 and subsequent regulatory approvals. This represents the seventh investment deployed from Antin's Flagship Fund V into infrastructure assets.
Vigor Marine operates as a ship-repair and maintenance, repair, and overhaul (MRO) provider headquartered in Portland with a footprint across five operational locations. The platform generated more than $1 billion in revenue during 2025 and employs approximately 2,700 personnel. The asset's scale and operational depth position it as a significant infrastructure holding within the portfolio.
The transaction preserves operational management: Francesco Valente, the company's chief executive, and the broader U.S. management team will continue leading operations following the close. This retention of incumbent leadership is material for stakeholders evaluating operational continuity and execution risk under new ownership.
The parties did not disclose purchase price or transaction terms. Consequently, critical investment metrics remain opaque to the market: Antin's entry multiple on Vigor's revenue and EBITDA base cannot be calculated, nor can Lone Star Fund XI's distributed proceeds or net return on the investment be determined. The announcement confirms only that the sale has been completed, with the transaction itself representing a sponsor-to-sponsor capital deployment in domestic maritime infrastructure.
Vigor Marine operates as a ship-repair and maintenance, repair, and overhaul (MRO) provider headquartered in Portland with a footprint across five operational locations. The platform generated more than $1 billion in revenue during 2025 and employs approximately 2,700 personnel. The asset's scale and operational depth position it as a significant infrastructure holding within the portfolio.
The transaction preserves operational management: Francesco Valente, the company's chief executive, and the broader U.S. management team will continue leading operations following the close. This retention of incumbent leadership is material for stakeholders evaluating operational continuity and execution risk under new ownership.
The parties did not disclose purchase price or transaction terms. Consequently, critical investment metrics remain opaque to the market: Antin's entry multiple on Vigor's revenue and EBITDA base cannot be calculated, nor can Lone Star Fund XI's distributed proceeds or net return on the investment be determined. The announcement confirms only that the sale has been completed, with the transaction itself representing a sponsor-to-sponsor capital deployment in domestic maritime infrastructure.
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