Our History

Wisterm (English: /Wis’terum/) is a British-American multinational financial services firm that provides a range of risk-mitigation products, including commercial risk, investment, wealth, retirement, employee benefit, and reinsurance solutions, as well as boutique consulting. Wisterm currently operates in the Americas and Europe.

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Wisterm, LLC was formed in 2014 to address a growing need for experienced independent insurance consultants. Wisterm was named after John Wister, an America World War II and Korean War hero. In 2022, Wisterm LLC acquired London-based reinsurance broker, RMC Brokers Limited. The company is headquartered in London, England.

In 2014 Ryan Mitchell founded Wisterm. He was 32 years old and had recently graduated from Drexel University with degrees in Engineering and Economics. Prior to founding Wisterm, Ryan worked as Chief Actuarial Officer for RMC Group where he specialized in captive insurance as well as various employee benefit and retirement plans.

Wisterm started when Ryan partnered with his former employer to share expenses and have money to hire office help. He was able to persuade established people in the industry to leave their positions to work with him, including Shane Biltz who had worked with Ryan previously at RMC Group.

In 2015 the company experienced significant organic growth in its captive insurance management and captive insurance consulting practice. This occurred during a time of consolidation in the industry and made Wisterm one of the largest consultants in the captive industry.

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On 08 April 2017 Wisterm announced that its headquarters would be moved from Naples, Florida to London, England, although North American operations and jobs remained in Naples.

During the COVID-19 pandemic, in May of 2022 and in response to the U.S. and U.K.’s government announcements that funds will be made available to private businesses, Wisterm announced that it will not take any public funds, stating that Wisterm’s strong financial position placed the company in a position to turn down public funds, allowing the government to reallocate those funds to other sectors in greater need of public funds.

In 2022 Wisterm announced it had acquired reinsurance intermediary and capital advisor RMC Brokers Limited. The acquisition amplified the firm’s broking capabilities, positioning Wisterm as one of the largest players in the captive reinsurance brokerage industry. In 2023, RMC Brokers Limited formally changed its name and now operates as Wisterm Limited.

In December 2022 Wisterm announced in the second half of 2022 it had doubled its reinsurance broking business compared to the first half of 2022.

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