Mosaic Insurance, the Bermuda-based hybrid specialty MGA-insurer, has launched an excess casualty business, expanding its underwriting platform into a segment increasingly shaped by rising loss severity and volatility across North America.
The new operation becomes Mosaic’s eighth global product line and is led by April Andruczyk, who joined the group as head of Bermuda, excess casualty.
The facility has already begun underwriting and targets large corporate and multinational clients navigating sustained pressure from social inflation, litigation finance, and nuclear verdict trends.
The business offers capacity of up to $10 mn per risk through Mosaic’s Bermuda platform, which sits within the group’s global agency network and draws support from Mosaic Syndicate 1609 alongside syndicated partners.
The structure is designed to provide consistent capacity at a time when excess casualty limits remain tight.
Excess casualty now sits alongside Mosaic’s existing underwriting lines, which include cyber, environmental liability, transactional liability, political risk, political violence, financial institutions, and professional liability.
The expansion reflects a deliberate move toward classes where volatility demands specialist underwriting rather than commoditised capacity.
Target sectors for the new line include transportation, consumer goods, industrial manufacturing, utilities, construction, energy, hospitality, real estate, and life sciences.
According to Beinsure, those sectors continue to absorb the sharpest effects of jury awards and expanding liability theories.
The underwriting team combines Bermuda and UK expertise, including Andrew Watson and Chris Abraham in Bermuda, junior underwriter Skyler Powell, and UK-based consultant Mike Warwicker.
All bring long-standing experience in complex excess casualty placements.
Mark Wheeler, co-CEO of Mosaic, said the timing reflected both market demand and the availability of specialist underwriting talent.
He said the excess casualty market remains under strain, with reliable capacity still in short supply, and described the new line as a carefully planned addition rather than a tactical response.
Our approach has been carefully considered and, like all our lines, leverages the most outstanding talent- this time, in complex excess casualty. We have strong aspirations for the product to become a significant line of business for us.
Andruczyk brings nearly 30 years of underwriting and leadership experience. Most recently, she served as vice president of general casualty at Allied World Assurance Company, overseeing underwriting strategy, portfolio management, and broker relationships. Before that, she spent 18 years at ACE Bermuda, now part of Chubb, where she ran the excess liability division after starting her career at legacy Chubb in New York.
Toby Smith, Americas CEO at Mosaic, said Andruczyk’s appointment plays a central role in building the new unit. He pointed to her technical depth and long-standing broker and client relationships as essential in a market defined by complexity rather than volume.
Warwicker said Bermuda continues to anchor global excess casualty placement. He described the market as durable and strategically important, supported by capital efficiency, a long underwriting track record, and growing relevance for multinational risks.
In April, 2025, Mosaic Insurance has entered the digital asset market with a combined cyber and financial institutions (FI) crime insurance product aimed at a sector that continues to expand but remains underserved by traditional insurers.
The offering includes modular coverage across cyber, technology errors and omissions (E&O), and crime. Clients can choose stand-alone options or combine coverages based on their exposure profiles.
The policy provides up to $10 mn in cyber and tech capacity and up to $5 mn for crime, underwritten through Mosaic’s global agency network and backed by Lloyd’s Syndicate 1609 and A+-rated international carriers.
Target clients include digital asset exchanges, custodians, wallets, trading platforms, blockchain analytics providers, ETF structures, miners, and RWA platforms.
These companies frequently encounter limited underwriting appetite, narrow coverage terms, and declining capacity due to perceived regulatory volatility or operational complexity.
Read more on Beinsure – Insurance, Reinsurance, InsurTech Insights
