Specialty re/insurance group Aventum has completed its first managing general agent (MGA) acquisition, purchasing marine underwriting specialist Post & Co as part of its strategy to build a leading independent specialty MGA platform.

The deal marks a significant milestone in Aventum’s international expansion, creating an immediate foothold in Continental Europe while strengthening its global marine offering. The acquisition also enhances the capabilities of Aventum’s global managing general specialist Rokstone, bringing the two businesses together under one platform.

According to Aventum, the transaction is both complementary and accretive, supporting its ambition to scale operations in strategically aligned markets. The group highlighted that the move opens up new growth opportunities across Europe and reinforces its position in marine insurance.

Founded in 1918 and headquartered in Rotterdam, Post & Co operates across four locations Rotterdam, Groningen, Antwerp and Frankfurt and is widely regarded as one of the most established marine underwriting businesses in Continental Europe. The firm offers a broad range of marine insurance products, including P&I, charterers’ and shipowners’ liability, war risk, cargo, and logistics-related cover.

Post & Co distributes its products through a network of around 250 brokers across Europe and Asia, supported by capacity from Lloyd’s and specialist company markets.

Following the acquisition, the business will continue to operate within the Aventum Group as part of Rokstone, with no changes to its management structure. CEO Roderick Post will remain actively involved, helping to drive growth and development across the enlarged group’s European platform and marine portfolio.

David Bearman, CEO of Aventum, said: “This acquisition opens up a significant new growth region for us in Continental Europe. It demonstrates how we will selectively use M&A to broaden our capabilities and accelerate growth where there is strong strategic alignment. Aventum is in a prime and enviable position – we’re independent with significant financial firepower that’s not constrained by punishing debt. That gives us the freedom to explore M&A opportunity in an environment where others are retreating.

“This is a landmark moment for Aventum, our first MGA acquisition, and one we are proud to be making. Post & Co is a business built over more than a century on deep sector expertise and an independent spirit.

“These are values that resonate strongly with Aventum. In welcoming Roderick and his team into the Aventum family, we gain not only a business of the highest calibre, but a leadership group whose experience and standing in the European MGA market will be invaluable.”

Roderick Post, CEO of Post & Co, added: “Post & Co has been part of our family for more than 100 years, and the decision to find the right long-term partner was one we approached with considerable care.

“Aventum’s values, its commitment to independence, to its people and to its ambition, align closely with everything Post & Co stands for. I am proud to be joining Rokstone and the Aventum Group and look forward to contributing to the development of the enlarged Group.”

The transaction remains subject to customary regulatory approvals, with financial terms not disclosed.