Insurance Industry Overview: How Insurers Create Value

Introduction

The insurance industry is one of the three pillars of the financial services landscape that FIG investment bankers cover, alongside banking and asset management. In the United States, insurers took in roughly $1.8 trillion of premiums in 2025: property/casualty (P&C) net premiums written of $980.3 billion and life/annuity premiums, considerations and deposits of $798.0 billion, according to the Insurance Information Institute's industry overview. That is a split of roughly 55% P&C and 45% life/annuity.

Understanding how insurers create value is foundational for FIG professionals. Unlike banks (which earn the spread between lending rates and funding costs) or asset managers (which earn fees on AUM), insurers operate a dual-engine business model: they generate underwriting profit by pricing risk correctly and investment income by deploying the capital held between premium collection and claims payment. The interaction between these two engines, and their sensitivity to market cycles, is what makes insurance analysis distinct from other FIG subsectors.

The global insurance market reflects significant regional variation in size, growth, and structure. Global premiums grew 7.1% to about €6.9 trillion in 2025, according to the Allianz Global Insurance Report 2026. Health was the fastest-growing segment (+12.3%), life premiums rose 6.9% and P&C premiums 3.8%, while Asian life premiums grew 9.9%. North America remains the anchor of the P&C market, writing 52% of the world's P&C premiums, and Allianz expects the global pool to grow about 5.3% a year over the next decade. For FIG bankers at bulge bracket firms, this global footprint means that insurance coverage increasingly requires cross-border expertise: European insurers like Allianz, AXA, and Zurich operate globally, and the largest reinsurers (Munich Re, Swiss Re, Hannover Re) are European-headquartered institutions that underwrite risk worldwide.

The Underwriting Engine

Insurance companies collect premiums from policyholders in exchange for assuming risk. The underwriting engine generates profit when the premiums collected exceed the sum of claims paid and operating expenses. This relationship is captured by the combined ratio:

A combined ratio below 100% means the insurer is earning an underwriting profit (collecting more in premiums than it pays in claims and expenses). A combined ratio above 100% means an underwriting loss. The ratio swings with catastrophe losses, claims inflation and pricing: the US P&C industry ran at 102.5% in 2022 and 101.7% in 2023, then improved to 96.9% in 2024 and 92.9% in 2025, a $68.7 billion underwriting gain, according to the NAIC's year-end 2025 industry snapshot.

The underwriting engine is fundamentally different across the two major insurance segments:

Property and Casualty (P&C) insurance covers tangible risks: auto accidents, property damage, natural disasters, liability lawsuits. P&C policies are typically one-year contracts, meaning the insurer can reprice annually. This repricing ability allows P&C insurers to respond to changing loss trends relatively quickly, but it also creates the underwriting cycle (periods of hardening and softening markets) that drives earnings volatility.

Life and annuity insurance covers mortality and longevity risks: life insurance pays on death, annuities pay on survival. Life policies are long-duration contracts (often 20-30 years or longer), meaning the insurer commits to pricing for decades. The profitability of a life insurer depends heavily on the accuracy of its mortality assumptions and, critically, on the investment returns earned on the reserves held over those decades.

Underwriting Profit

The profit an insurance company earns from its core risk-transfer business, calculated as net premiums earned minus incurred losses, loss adjustment expenses, and underwriting expenses (commissions, policy acquisition costs, and general administrative expenses). Underwriting profit is distinct from investment income; together, they constitute total operating income for an insurer. A company that consistently earns underwriting profit is collecting premiums that more than compensate for the risks it assumes, demonstrating pricing discipline and risk selection skill. Underwriting profit is measured by the combined ratio: a ratio below 100% indicates underwriting profit, while a ratio above 100% indicates an underwriting loss. Investors pay most for carriers that earn it consistently across the cycle, not only in years with light catastrophe losses.

The Investment Engine

Between the time an insurer collects a premium and the time it pays a claim, the premium sits on the insurer's balance sheet as an investable asset. This pool of money is called float, and the investment income it generates is the second engine of insurer profitability.

The investment portfolio composition varies significantly by insurer type, as the NAIC's year-end 2025 asset mix report and its industry snapshot show:

Life insurers hold significantly larger investment portfolios relative to premiums because their liabilities extend decades into the future. US life insurers held about $6.1 trillion of cash and invested assets at year-end 2025, roughly twice the $3.1 trillion held by P&C insurers. A life insurer that sells a whole life policy to a 35-year-old may not pay the death benefit for 40+ years, earning investment income on the reserves throughout that period. This is why investment portfolio management is central to life insurance profitability, and why life insurer valuations are heavily influenced by interest rate environments.

P&C insurers hold shorter-duration portfolios because their claims are typically paid within 1-3 years. However, for "long-tail" lines (such as workers' compensation, medical malpractice, and general liability), reserves may be held for 5-10 years, allowing meaningful investment income accumulation.

The insurance industry operates through a three-layer value chain, and each layer represents a distinct business model, risk profile, and valuation approach for FIG professionals.

Carriers (Risk-Bearing Entities)

Carriers are the companies that actually assume risk and hold reserves against potential claims. They collect premiums, establish reserves, invest the float, and pay claims. Carriers require significant capital to support their underwriting (measured by Risk-Based Capital ratios in the US and Solvency II capital ratios in Europe) and are valued primarily on P/E, price-to-book, and (for life insurers) embedded value multiples.

The US carrier landscape is concentrated at the top but fragmented below:

Insurance Float

The total amount of money an insurer holds between collecting premiums and paying claims. Float represents a form of leverage: the insurer can invest the float and earn returns on money that belongs to policyholders (in the sense that it will eventually be paid out as claims). When an insurer earns an underwriting profit (combined ratio below 100%), the float is effectively free capital, as the insurer is being paid to hold it. Warren Buffett built Berkshire Hathaway around this idea: Berkshire's insurance float reached about $176 billion at year-end 2025, up from $171 billion a year earlier, and the investment returns on this float have been central to Berkshire's long-term value creation. Float grows as premiums grow, making it a self-reinforcing advantage for profitable, growing insurers.

Brokers and Distributors

Insurance brokers are intermediaries that place risk with carriers on behalf of policyholders. They do not assume risk or hold reserves; instead, they earn commissions and fees for distributing insurance products. This capital-light, fee-based model generates higher returns on equity and more predictable revenue streams than carriers, which is why brokers are valued on EV/EBITDA rather than book value and have historically traded at a premium to most of FIG (the valuation section below shows how that premium has narrowed).

The broker consolidation wave has been one of the most active areas of insurance M&A, with a string of platform deals reshaping the landscape:

The insurance brokerage mega-deal wave explains how these transactions reshaped the broker league table.

Reinsurers

Reinsurers are insurance companies that insure other insurance companies. When a primary carrier writes a policy with risk it does not want to retain entirely, it cedes a portion of the premium and risk to a reinsurer. Reinsurers provide capacity, capital relief, and catastrophe protection to the primary market. Global reinsurance leaders include Munich Re, Swiss Re, Hannover Re, and Berkshire Hathaway, and the market is headquartered in Bermuda and European financial centers.

The value chain maps directly onto how each business is valued. A carrier's balance sheet is its operating business: reserves are its main liability, investment income is core earnings, and capital caps how much premium it can write. EBITDA therefore says little about a carrier, which is why carriers trade on price-to-book and forward P/E, while capital-light brokers trade on EV/EBITDA like any fee business. Setting a carrier "EBITDA multiple" beside a broker's is a category error that interviewers notice.

Public market medians from Mercer Capital's Q1 2026 insurance valuation data show how far apart the frameworks sit:

Broker multiples move with the pricing cycle. As softer property pricing slowed organic growth, the public group's forward EBITDA multiple fell from 13.9x at year-end 2025 to 12.3x by March 2026, per Mercer Capital's first-quarter 2026 review, and Brown & Brown went from about 17.8x to 12.9x EBITDA during 2025, per Insurance Journal. Control deals for large platforms still clear at roughly 14-18x: Aon is paying about 14.5x synergized trailing adjusted EBITDA for USI, according to Aon's announcement. How insurance brokers are valued covers EBITDAC, earnouts and the tuck-in arbitrage in depth.

For carriers, the book multiple depends on how much the company earns on its equity relative to its cost of capital. The justified P/B framework makes the link explicit, where r is the cost of equity and g is the sustainable growth rate of book value:

Plugging in realistic carrier assumptions shows why underwriting discipline is worth so much to shareholders.

Life insurers sit lowest on both measures. Their earnings depend on interest rates, credit spreads and long-dated actuarial assumptions, and their returns are thinner: the US life industry's statutory ROE was 5.7% in 2025, against a 12.6% return on surplus for P&C insurers, per the NAIC snapshot. Many life companies, especially outside the US, are also valued on embedded value, which captures the present value of profits locked into in-force policies.

Insurance is one of the most active sources of FIG deal flow, and the dynamics differ from bank M&A: buyers are pricing underwriting books, distribution relationships and long-dated liabilities rather than deposit franchises.

The major transaction categories include:

Broker consolidation is the highest-volume deal type, driven by PE-backed platforms acquiring smaller agencies and brokerages to build scale. The fragmented distribution landscape (thousands of independent agencies) creates a long runway for roll-up strategies, although the pace has cooled: OPTIS Partners counted 439 US agency deals in the first three quarters of 2026, down 19%, with PE-backed and hybrid buyers behind 76% of them, as reported by Insurance Business. As platforms bought in 2019-2021 reach the end of typical hold periods, sponsor exits such as KKR's sale of USI to Aon are becoming a bigger part of the mandate flow.

Life insurance block transactions involve the sale of closed blocks of life insurance or annuity policies from primary carriers to specialized acquirers, often platforms backed by alternative asset managers (Apollo's Athene, KKR's Global Atlantic) or consolidators such as Resolution Life, which Nippon Life bought out for $8.2 billion in a deal completed in October 2025, as Reinsurance News reported. The acquirer takes on the liability and the investment portfolio, seeking to earn higher investment returns through active portfolio management.

P&C carrier M&A tends to be cyclical, accelerating after periods of underwriting profitability (when carriers have excess capital) and during hard markets (when acquired books of business are repricing favorably). Sompo's agreement in August 2025 to buy Bermuda-based specialty carrier Aspen for about $3.5 billion, reported by Insurance Business, fits the pattern: a well-capitalized strategic buyer adding specialty underwriting capacity after several years of strong pricing.

MGA/MGU acquisitions have surged as PE firms recognize managing general agents as capital-light platforms with underwriting authority, combining the economics of a broker with the underwriting expertise of a carrier.

Insurance regulation in the US is unique among financial services: it is primarily state-based rather than federal. Each state has its own insurance department and commissioner, and insurers must be licensed in every state where they operate. The National Association of Insurance Commissioners (NAIC) coordinates regulatory standards across states but does not have federal regulatory authority.

The key regulatory capital metric for US insurers is Risk-Based Capital (RBC), which measures an insurer's surplus relative to the risks it assumes (underwriting risk, asset risk, credit risk, and off-balance-sheet risk). Insurers must maintain RBC ratios above regulatory minimums (typically 200%+ of the Authorized Control Level) to avoid supervisory intervention. This framework differs fundamentally from banking regulation (which is federal, centralized, and structured around Basel capital standards) and creates distinct M&A considerations: regulatory approval for insurance transactions involves state-level reviews, and multi-state insurers may require approval from multiple commissioners.

For FIG bankers, understanding the regulatory approval process, RBC and Solvency II frameworks, and the state-based structure is essential for advising on insurance transactions.

The European insurance regulatory framework operates under a fundamentally different philosophy. Solvency II, implemented across the EU since 2016, is a principles-based, risk-sensitive regime whose Solvency Capital Requirement (SCR) is calibrated to withstand a 1-in-200-year loss over one year, rather than the factor-based formula behind US RBC. European insurers hold comfortable buffers above it: at end-2025 the median SCR ratio was 247.0% for life insurers, 219.0% for composites and 213.7% for non-life insurers, according to EIOPA's June 2026 Financial Stability Report. The UK, post-Brexit, has adapted Solvency II through its own reforms, and Lloyd's of London operates under PRA supervision with Lloyd's-specific Solvency II requirements. For FIG bankers advising on cross-border insurance transactions, the capital regime differences between US RBC and European Solvency II create both friction (different capital calculations, different statutory reporting) and opportunity (regulatory arbitrage in reinsurance structures, particularly through Bermuda vehicles that bridge the two regimes).

Insurance is a sector where deep specialization pays dividends. The interaction between underwriting and investment, the regulatory complexity of state-based oversight and cross-border capital regimes, and the diversity of business models across carriers, brokers, reinsurers, and specialty platforms create analytical challenges that generalist coverage bankers rarely encounter. For FIG professionals, insurance advisory represents a durable and growing revenue source: the structural forces driving consolidation (broker roll-ups, life block transactions, MGA acquisitions, carrier scale-seeking) remain in place even as agency deal counts cool, and the coming wave of sponsor exits from broker platforms adds a further source of mandates across market cycles.