MS Reinsurance
MS Reinsurance is a Zurich-based global non-life treaty reinsurer and wholly-owned subsidiary of MS&AD, underwriting Property & Casualty and Specialty Lines capacity across the Americas, EMEA, and Asia-Pacific for insurance company clients.
- Company typePrivate
- Founded2023
- HeadquartersZürich, Switzerland
- Headcount251–500
- GTM typeB2B
- OfferingServices
What MS Reinsurance does
MS Reinsurance is a Zurich-headquartered global non-life treaty reinsurer and a wholly-owned subsidiary of MS&AD (Mitsui Sumitomo Insurance Group). The company underwrites proportional and non-proportional reinsurance capacity across two main product lines: Property & Casualty (catastrophe treaties, per risk treaties, general liability, D&O and E&O, workers' compensation, medical professional liability) and Specialty Lines (Agriculture, Cyber, Financial Risks, Engineering, Complex Industrial and Corporate Risks). Distribution is conducted through three underwriting units — Americas, International, and Global Specialty Lines — with offices in Zurich, Bermuda, Miami, New York, London, and Labuan, allowing the company to serve cedants across North America, Latin America, EMEA, and Asia-Pacific.
The platform operates on a traditional reinsurance underwriting model, generating revenue through gross written premiums, with underwriting teams structured by client type to align expertise with client need. The company does not disclose proprietary technology or AI/ML product capability; its core technology is the non-life reinsurance underwriting platform itself, augmented by a recently hired Chief Information and Data Officer leading digital transformation. The company reports financial strength ratings of A+ (Stable) from both AM Best and S&P Global Ratings, with $3.9B in gross written premiums, $415M in net profit, and a combined ratio of 87.4% for 2025.
MS Reinsurance is a sales-led enterprise, distributing reinsurance through direct underwriting relationships with insurance companies. The company is led by CEO Robert Wiest, a former Swiss Re Reinsurance COO, and a leadership team staffed heavily with alumni from Swiss Re, Munich Re, PartnerRe, and AXA XL. Its go-to-market emphasizes a portfolio mindset, long-term through-cycle partnership, responsive service, and customized coverage rather than price-led competition; it has a strategic partnership with Envelop for cyber reinsurance and is actively deepening its Americas underwriting bench in 2026.
MS Reinsurance firmographics
Firmographics- Name
- MS Reinsurance
- Legal name
- MS Amlin AG
- Website
- https://msreinsurance.com
- Company type
- Private
- Founded year
- 2023
- Operating status
- Operating
- Headcount range
- 251–500 employees
- Short description
- MS Reinsurance is a Zurich-based global non-life treaty reinsurer and wholly-owned subsidiary of MS&AD, underwriting Property & Casualty and Specialty Lines capacity across the Americas, EMEA, and Asia-Pacific for insurance company clients.
- Ownership category
- akta.pro rank
MS Reinsurance industry classification
Industry- Product category
- Non-life Reinsurance
- NAICS
- Reinsurance Carriers (524130), Insurance Carriers and Related Activities (524)
- SIC
- Fire, Marine & Casualty Insurance (6331)
- akta.pro primary industry
- Casualty Treaty Reinsurance (FSAOAEAD)
- akta.pro secondary industries
- Catastrophe Treaty Reinsurance (FSAOAEAE), Financial Lines Treaty Reinsurance (e.g., D&O, E&O, professional liability) (FSAOAEAG), Professional Liability (E&O) Reinsurance (FSAOADAH), Construction / Engineering (CAR/EAR) Reinsurance (FSAOADAG)
Keywords
Where MS Reinsurance is headquartered
LocationHeadquarters
- HQ city
- Zürich
- HQ country
- Switzerland
- HQ region
- Europe
Offices6 records
Markets served
MS Reinsurance business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Infrastructure, Marketing or Sales, Others
Revenue model
- Reinsurance Premiums: MS Reinsurance generates revenue through gross written premiums from non-life treaty reinsurance solutions. For the year ended 2025, gross written premiums grew to $3.9 billion from $3.6 billion in 2024.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels3 records
MS Reinsurance product offering
Product offeringCore offering
MS Reinsurance is a global non-life treaty reinsurer that provides proportional and non-proportional reinsurance capacity to insurance companies worldwide. The offering is organized into two product pillars — Property & Casualty Reinsurance (catastrophe treaties, per risk treaties, casualty lines including general liability, D&O/E&O, workers' compensation, and medical professional liability) and Specialty Lines Reinsurance (Agriculture, Cyber, Financial Risks, Engineering, and Complex Industrial and Corporate Risks) — delivered through three underwriting units (Americas, International, and Global Specialty Lines).
Product overview
MS Reinsurance is a global reinsurance company that provides non-life reinsurance solutions through two main product lines: Property & Casualty Reinsurance (covering catastrophe treaties, per risk treaties, proportional treaties, and casualty lines including general liability, D&O/E&O, workers compensation, and medical professional liability) and Specialty Lines Reinsurance (covering Agriculture, Cyber, Financial Risks, Engineering, and Complex Industrial and Corporate Risks). The company operates as a unified platform delivering tailored reinsurance capacity across Americas, International, and Global Specialty Lines business units, all supported by robust capacity and A+ ratings from both AM Best and S&P Global Ratings.
Differentiator
Problem solved
Functional benefit
Products and services
- Property & Casualty Reinsurance Non-life treaty reinsurance providing proportional and non-proportional capacity across a wide range of property and casualty risks, including catastrophe treaties, per risk treaties, proportional treaties for property, and casualty lines such as general liability, D&O and E&O liability, workers' compensation, and medical professional liability. Designed for insurance company cedents seeking reinsurance capacity and expertise across multiple lines of business.
- Specialty Lines Reinsurance Specialized non-life reinsurance solutions for unique and dynamic risks, covering Agriculture, Cyber (delivered in partnership with Envelop), Financial Risks, Engineering, and Complex Industrial and Corporate Risks. Targeted at insurance company cedents and corporate risk pools needing specialized underwriting expertise, customization, and capacity that standard treaty markets do not provide.
Quantifiable outcome
- Improved combined ratio to 87.4% in 2025 from 88.7% in 2024
- +1 more outcomes
Companies that use MS Reinsurance
Customer profileSegments4 records
Ideal customer profiles2 records
MS Reinsurance technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
MS Reinsurance partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- EnvelopminorMS Reinsurance has a strategic partnership with Envelop for cyber reinsurance offerings. This partnership enables the company to provide comprehensive cyber reinsurance protection to clients by combining Envelop's cyber expertise with MS Reinsurance's underwriting capabilities.
Scale indicators7 records
Recent moves7 records
Expansion highlights5 records
MS Reinsurance competitors and assessment
Company assessmentDirect peers
- AXIS Capital: AXIS Capital operates AXIS Re as a global P&C and specialty treaty reinsurer, with significant overlap to MS Reinsurance's product offering. MS Reinsurance's CIDO Benedikt Schmid previously held senior IT roles at AXIS Re, and both serve comparable cedant panels across specialty and treaty P&C lines.
- PartnerRe: PartnerRe is a Bermuda-based global multi-line reinsurer owned by Exor. Former Group CUO Charles Goldie served five years at MS Re but has industry depth; Jörg Bruniecki previously headed Global Client and Broker Management at PartnerRe. Both write P&C and specialty treaty with comparable geographies.
- Everest Re: Everest Re is a Bermuda-listed global P&C reinsurer with strong North American treaty presence. Both companies share a comparable product profile (cat, per risk, casualty treaty) and compete for the same North American cedant relationships that MS Reinsurance targets through its Miami and New York underwriting offices.
- Munich Re: Munich Re is the second-largest global reinsurer and the dominant specialty reinsurance platform. MS Reinsurance's Group CUO Jörg Bruniecki previously held senior roles at Munich Re, and both companies write proportional and non-proportional P&C and specialty treaty business on a worldwide basis.
- SCOR: SCOR is a French-listed global reinsurer writing P&C and Life treaty business across the Americas, EMEA and APAC. MS Reinsurance's Chief Technical Underwriting Officer Louis de Segonzac was previously VP, Latin America and Caribbean at SCOR. Both target the same cedant client base for non-life treaty solutions.
- Hannover Re: Hannover Re is the third-largest global reinsurer and one of the most disciplined underwriters in P&C treaty. Both companies write a similar mix of property catastrophe, non-proportional, and specialty treaty business globally, and compete for cedant panel positions in the same markets MS Reinsurance serves.
- RenaissanceRe: RenaissanceRe is a Bermuda-based specialty reinsurer dominant in property catastrophe and increasingly expanding into specialty casualty. While its product mix skews more cat-heavy, it competes for the same proportional and non-proportional P&C treaty placements that MS Reinsurance underwrites through its Americas unit.
- Swiss Re: Swiss Re is the world's largest dedicated reinsurer, offering both P&C and life/health treaty reinsurance globally. MS Reinsurance's CEO Robert Wiest spent 30 years at Swiss Re, most recently as COO of the Reinsurance division, and several other senior team members are former Swiss Re executives. Both companies compete head-to-head for the same treaty cedant relationships.
Others
- Envelop: Envelop is a specialty managing underwriting agent focused on cyber insurance. MS Reinsurance has an exclusive strategic partnership with Envelop to provide cyber reinsurance capacity, making Envelop a meaningful ecosystem partner rather than a direct competitor, given the limited overlap with MS Re's broader P&C and specialty treaty book.
Broad incumbents
- Lloyd's of London: Lloyd's of London is a global insurance and reinsurance marketplace where many of MS Reinsurance's cedant clients place specialty and complex risk business. While not a direct competitor to MS Re's treaty book, Lloyd's syndicates compete for similar proportional and non-proportional treaty placements and serve as a meaningful distribution channel for specialty reinsurance.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks5 records
Key highlights7 records
Customer concentration
MS Reinsurance social profiles
Digital presenceMS Reinsurance financial estimates
Financial estimateRevenue estimate
Valuation estimate
MS Reinsurance leadership team
Management profileNumber of profiles
Profiles12 records
MS Reinsurance subsidiaries and ownership
Company hierarchySubsidiaries2 records
MS Reinsurance funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
MS Reinsurance M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about MS Reinsurance
What does MS Reinsurance do?
MS Reinsurance is a global non-life treaty reinsurer that provides proportional and non-proportional reinsurance capacity to insurance companies worldwide. The offering is organized into two product pillars — Property & Casualty Reinsurance (catastrophe treaties, per risk treaties, casualty lines including general liability, D&O/E&O, workers' compensation, and medical professional liability) and Specialty Lines Reinsurance (Agriculture, Cyber, Financial Risks, Engineering, and Complex Industrial and Corporate Risks) — delivered through three underwriting units (Americas, International, and Global Specialty Lines).
Is MS Reinsurance a public or private company?
MS Reinsurance is a private company. It is classified as corporate owned and is currently operating.
When was MS Reinsurance founded?
MS Reinsurance was founded in 2023. It employs 251 to 500 people.
Where is MS Reinsurance based?
MS Reinsurance is headquartered in Zürich, Switzerland, in the Europe region.
How does MS Reinsurance make money?
One revenue line is on record: reinsurance Premiums.
Who are MS Reinsurance's main competitors?
Direct peers on record are AXIS Capital, PartnerRe, Everest Re, Munich Re, SCOR, Hannover Re, RenaissanceRe and Swiss Re. Envelop is listed as an others. Lloyd's of London is listed as a broad incumbent.
Does MS Reinsurance have an API?
No public API is recorded for MS Reinsurance.
What industry is MS Reinsurance in?
MS Reinsurance's product category is Non-life Reinsurance. Its primary akta.pro industry code is FSAOAEAD, Casualty Treaty Reinsurance, with a secondary code of FSAOAEAE, Catastrophe Treaty Reinsurance. Its NAICS code is 524130 and its SIC code is 6331.