Converium
A Swiss reinsurance group that operated internationally before being acquired by SCOR in 2007.
Last updated August 31, 2026
Overview
Converium was an international reinsurance group headquartered in Zurich, Switzerland. Established in 1995, the company operated through its holding company and subsidiaries across Europe, Asia, the Middle East, and Latin America. Its business was focused on assuming insurance risks from primary insurers rather than selling most policies directly to consumers. The company therefore served insurance institutions that needed to transfer part of their exposure, manage capital requirements, stabilize results, or obtain capacity for specialized risks. The group provided both life and non-life reinsurance. Its non-life activities covered standard liability classes as well as more specialized liability business, including workers' compensation. Its life and health portfolio included a range of reinsurance arrangements supporting insurers in those sectors. The available reference material also identifies an alliance with the Medical Defence Union, reflecting Converium's participation in arrangements connected with medical-profession liability and related insurance needs. Converium's corporate history was closely connected with the restructuring of Zurich's insurance interests. Although it developed a substantial international business and reported good underlying business performance, the company encountered severe pressure from credit-rating downgrades in 2004. Management argued that the downgrades damaged the company's franchise and commercial standing. The episode illustrates the importance of financial-strength ratings in reinsurance, where cedants and brokers often rely on ratings when selecting counterparties for long-duration and catastrophe-sensitive obligations. In 2007, Converium became the target of a hostile takeover effort. French reinsurer SCOR built a stake of almost 33 percent with assistance from investor Martin Ebner and Zürcher Kantonalbank. The acquisition campaign involved a controversial option arrangement and contributed to the collapse of Converium's management during its attempt to defend the company. SCOR ultimately purchased Converium in 2007. Following the transaction, Converium ceased to exist as an independent reinsurance group and its business was absorbed into SCOR's operations. Converium is therefore best understood as a former multinational reinsurance company rather than a current standalone brand. Its historical importance rests on its broad cross-border platform, its mix of life, health, and non-life reinsurance, the effect of rating-agency actions on its franchise, and the hostile takeover that brought it into the SCOR group.
History
Converium was founded in 1995 and developed as a specialist financial-services group focused on reinsurance. Its business model was based on accepting portions of insurers' life, health, and property-and-casualty risks in exchange for reinsurance premiums. Through its parent holding company and subsidiaries, the group served clients across Europe, Asia, the Middle East, and Latin America. The company operated across a broad set of reinsurance lines. In non-life reinsurance, it supported standard liability business and also participated in specialized liability classes, including workers' compensation. Its life and health activities covered multiple forms of insurance risk transfer in those sectors. Converium also maintained an alliance with the Medical Defence Union, linking the group to insurance arrangements involving medical-profession risks and related business concerns. A major challenge emerged in 2004, when Converium received a series of credit-rating downgrades. The downgrades occurred despite the company's stated view that its business performance was sound. Converium publicly objected to the ratings actions and said that they damaged its franchise. For a reinsurer, this was a particularly serious issue because insurers, brokers, and other counterparties commonly consider financial-strength ratings when deciding whether to place business with a carrier. The episode placed pressure on Converium's commercial credibility and corporate leadership. Converium's final major phase was the takeover contest that began in 2007. SCOR, a French reinsurer, made Converium the target of a hostile acquisition effort. Investor Martin Ebner and Zürcher Kantonalbank assisted SCOR in assembling a position of almost 33 percent. The position was associated with a controversial option deal. During the defensive struggle, Converium's management collapsed, weakening the company's ability to resist the bid. SCOR completed the purchase in 2007. The acquisition ended Converium's existence as an independent reinsurance group. Its business and operations were incorporated into SCOR, making Converium a historical predecessor and former operating brand rather than an active standalone company. The company's trajectory—from international expansion and multi-line reinsurance operations to rating pressure and eventual takeover—illustrates the strategic importance of scale, capital strength, ratings, and consolidation in the global reinsurance industry.
- 2007Acquisition by SCOR
SCOR acquired Converium after a hostile takeover campaign, ending Converium's independent existence.
- 2004Series of credit-rating downgrades
The company experienced multiple downgrades despite describing its business performance as good, and argued that the actions harmed its franchise.
- 1995Converium was founded
Converium was established as an international reinsurance business.
Products and positioning
An internationally active, multi-line reinsurer serving insurance companies across Europe, Asia, the Middle East, and Latin America.
Life reinsuranceLife insurance reinsurance
Converium provided life reinsurance for insurers seeking to transfer part of their life-insurance exposure. The reference material describes the business broadly as covering multiple life lines, but does not identify specific named contracts or product series.
Health reinsuranceHealth insurance reinsurance
The company offered health reinsurance alongside its life portfolio. These services enabled insurance companies to share or transfer health-related underwriting risks through reinsurance arrangements.
Non-life liability reinsuranceProperty and casualty reinsurance
Converium's non-life business included standard liability reinsurance and specialized liability classes. The portfolio supported insurers that needed additional capacity or risk diversification for liability exposures.
Workers' compensation reinsuranceSpecialty liability reinsurance
Workers' compensation was identified as one of the specialized liability areas in which Converium participated. The company accepted reinsured workers' compensation exposures from insurance-sector clients.
Flagship businesses
- International life and health reinsurance
- Standard and specialty non-life liability reinsurance
- Workers' compensation reinsurance
Brand decisions
- 2007Management pursued a defense against SCOR's hostile takeoverM&A
SCOR targeted Converium in a hostile acquisition effort and built a stake of almost 33 percent with assistance from Martin Ebner and Zürcher Kantonalbank.
What changed. Converium attempted to defend its independence, but the defensive struggle contributed to the collapse of its management.
Aftermath. SCOR purchased Converium in 2007, after which Converium ceased operating as an independent reinsurance group.
- SCOR — SCOR pursued the acquisition and ultimately incorporated Converium into its group.
Recent events
- 2007SCOR acquired Converium after a hostile takeover campaign
French reinsurer SCOR acquired Converium after becoming involved in a hostile takeover effort. Martin Ebner and Zürcher Kantonalbank helped SCOR build a stake of almost 33 percent through an option arrangement described as controversial in the reference material.
M&ALeadership change - 2004Converium faced a series of credit-rating downgrades
Converium experienced several downgrades despite what it described as good business performance. The company criticized the ratings actions, arguing that they harmed its franchise and commercial position.
RegulationOther
Sources
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