MS&AD Insurance Group Holdings is a global firm known for its insurance and strong reinsurance arm. In 2024, its reinsurance business earned $3.6 billion in premiums and made a $322 million profit.
The group launched in 2010 through a merger of major Japanese insurers: Mitsui Sumitomo, Aioi, and Nissay Dowa. The company traces its roots to firms founded over 100 years ago in Japan.
It grew through mergers, global deals, and entry into top-tier reinsurance markets. Other milestones that shaped MS&AD’s position as a global reinsurance and insurance group:
- 1934: started direct underwriting in Thailand as the first Japanese insurer
- 1959: reinforced the business link with Toyota Motor Corporation
- 1975: led space insurance with cover for Japan’s first satellite, KIKU
- 2000: entered Lloyd’s market as first Japanese non-life company with own syndicate
- 2016: acquired UK-based Amlin, a top player in the Lloyd’s insurance market
- 2023: named among the world’s top 40 global reinsurance companies by S&P Global Ratings
MS&AD Insurance Group Holdings also reorganized to sharpen its business focus across global markets. By 2024, it operated in 48 countries and built a strong reinsurance brand under MS Reinsurance.
MS&AD Insurance Group Holdings runs its reinsurance business through MS Reinsurance, formerly known as Amlin AG:
- property reinsurance: covers catastrophe, commercial, and industrial risks using treaty-based proportional and non-proportional structures
- casualty reinsurance: insures long-tail liability risks across general, motor, and professional lines worldwide
- agriculture reinsurance: supports crop losses and weather-linked farming risks with global market solutions
- engineering reinsurance: protects construction projects and infrastructure with specialty technical and machinery cover
- cyber reinsurance: backs digital breach events with liability-focused treaty reinsurance protections
- financial risks reinsurance: provides credit and structured risk coverage in complex financial sectors
Other services and capabilities
- risk modeling and advisory: applies disaster modeling and simulations to guide underwriting and risk decisions
- global market coverage: delivers reinsurance services across international, regional, and niche specialty segments
- customized treaty solutions: structures multiline reinsurance packages with options for annual aggregate protection
Reinsurance now drives the group’s growth and helps spread earnings across regions. MS&AD Insurance Group Holdings plans to scale this in the US and Asia using stable, focused expansion.
MS&AD Insurance Group Holdings builds a workplace around autonomy, innovation, and mutual respect. Their “human asset strategy” focuses on self-growth, transformation, and shared group synergy.
Career development and education
- self-directed career development: post-challenge and free agent programs support employee-driven career moves
- digital learning programs: includes MS&AD Digital Academy, Digital College from Kyoto, and workshops
- actuarial qualification support: employees get help to pass exams by the Institute of Actuaries of Japan
- corporate university: AD University tracks skill growth and supports self-driven learning
- trainee programs: short-term placements build unity and cross-company skills
Work-life balance and flexibility
- remote and hybrid work: combines telework, satellite offices, and in-person days
- side jobs allowed: relaxed rules on second jobs to support skill use and growth
- no mandatory relocation: employees choose moves based on life events and goals
- flexible shifts: includes shift work and short-term schedules
- early finish culture: targets end-of-day by 5 p.m. to cut long hours
Health and wellness
- healthcare programs: checkups, smoke-free aid, fitness apps, and daily health campaigns
- mental health care: e-learning, stress checks, consultations, and return-to-work support
- paid medical leave: 32 days yearly, with 65 days carry-over for long-term needs
- balance support: offers remote work, short hours, and travel options during treatment
Parental and family support
- paternity leave: one-month leave goal with 100 percent participation target
- childcare leave: flexible leave options across all Group firms
Performance and engagement
- 360-degree feedback: reviews from peers, managers, and team for fair evaluation
- goal-based reviews: annual reviews align personal vision with company mission
- employee surveys: yearly input helps shape policies and systems
- direct dialogue with executives: open forums connect staff with leadership
Diversity, equity and inclusion
- inclusive leadership: training encourages open, respectful team culture
- female leadership targets: aims for 30 percent female managers by 2030
- support for athletes: employs Paralympic and Olympic athletes with flexible work setups
It empowers employees to lead change through value creation and business transformation. MS&AD Insurance Group Holdings’ people-first model strengthens resilience, diversity, and shared corporate value across the group.
The group issued two $100 million catastrophe bonds to boost disaster risk coverage worldwide. This supports smarter risk control and strengthens capital tools for future global challenges. MS&AD is shifting toward long-term strategies that use data, resilience, and financial innovation.
MS Amlin, a reinsurance and specialty unit of MS&AD, launched a partnerships division in 2025. The team works on expanding reinsurance offerings through internal group links and external partner deals. It fits MS&AD Insurance Group Holdings’ goal to boost specialty risk and global network synergy across all markets.
