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🎯 '''Concentration risk (M&A)''' is the exposure an acquirer or combined entity faces when a disproportionate share of revenue, [[Definition:Premium | premium volume]], [[Definition:Claims | claims liability]], or operational dependency is tied to a single source — whether that source is a line of business, geographic market, [[Definition:Reinsurance | reinsurer]], distribution partner, or customer segment. In [[Definition:Insurance mergers and acquisitions (M&A) | insurance M&A]], this risk demands specialized scrutiny because concentrations that appear manageable in normal conditions can become catastrophic when a [[Definition:Loss event | loss event]], market dislocation, or counterparty failure strikes. A buyer that acquires a [[Definition:Managing general agent (MGA) | MGA]] generating 80% of its [[Definition:Gross written premium (GWP) | gross written premium]] from a single [[Definition:Insurance carrier | carrier]] partner, for instance, holds a business whose value could evaporate if that relationship terminates.

📊 During [[Definition:Buyer-side due diligence | buyer-side due diligence]], analysts map concentration across multiple dimensions. On the underwriting side, they examine how [[Definition:Premium | premium]] distributes across [[Definition:Line of business | lines of business]], policy sizes, and geographies — a [[Definition:Property insurance | property]] carrier heavily weighted toward coastal wind exposure carries a very different concentration profile than one with a nationally diversified book. On the distribution side, reliance on a small number of [[Definition:Insurance broker | brokers]] or [[Definition:Program administrator | program administrators]] represents a revenue fragility that acquirers must price. [[Definition:Reinsurance | Reinsurance]] concentration — where a large share of ceded premium flows to one or two [[Definition:Reinsurer | reinsurers]] — creates [[Definition:Counterparty credit risk | counterparty credit risk]] that can impair [[Definition:Loss reserves | net reserves]] if a reinsurer becomes [[Definition:Insolvency | insolvent]] or disputes recoveries. Operational concentrations, such as dependence on a single [[Definition:Policy administration system | technology platform]] or a key individual for [[Definition:Underwriting | underwriting]] judgment, also factor into valuation.

💡 Failing to identify and address concentration risk before closing often leads to painful post-acquisition surprises. Acquirers have watched deal value collapse when a dominant distribution partner defected to a competitor, when a concentrated catastrophe-exposed [[Definition:Book of business | book of business]] produced outsized losses in a single event, or when a key [[Definition:Reinsurance | reinsurance treaty]] was non-renewed at terms that made the underlying business uneconomical. Sophisticated buyers quantify these exposures in their financial models — applying stressed scenarios to concentrated positions — and build protections into the deal through [[Definition:Escrow (insurance M&A) | escrow mechanisms]], [[Definition:Earnout | earnout structures]] tied to retention of key relationships, or [[Definition:Purchase price adjustment (insurance) | purchase price adjustments]] that account for diversification shortfalls.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Buyer-side due diligence]]
* [[Definition:Counterparty credit risk]]
* [[Definition:Catastrophe exposure]]
* [[Definition:Book of business]]
* [[Definition:Reinsurance]]
* [[Definition:Key person risk]]
{{Div col end}}

Definition:Concentration risk (M&A) - Revision history

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