# Aspen Insurance Holdings Ltd

Aspen Insurance Holdings Ltd is an Insurance based in Hamilton, Bermuda.

## Overview

- **Organization type:** Insurance
- **Headquarters:** Hamilton, Bermuda
- **Region:** North America
- **Address:** Hamilton, Bermuda
- **Founded:** 2002
- **Assets under management:** Undisclosed
- **Website:** www.aspen-insurance.com

## Regulatory record

- **Reports private funds:** No

## About

Aspen Insurance Holdings Ltd was founded in 2002 in Hamilton, Bermuda, by Mark Cloutier and a team of insurance executives. The firm went public on the New York Stock Exchange in 2003, listing under ticker AHL, and has since grown into a global specialty insurer and reinsurer with offices in London, Zurich, New York, and Singapore. The firm underwrites a diversified portfolio of property and casualty insurance, reinsurance, marine, aviation, and specialty lines. Aspen operates through two main segments: Aspen Insurance, which writes primary insurance, and Aspen Re, which writes treaty and facultative reinsurance. Notable recent developments include the 2019 acquisition of Aspen by Apollo Global Management and other investors for $2.6 billion, taking the firm private; however, Aspen remains one of the larger Bermuda-based insurers with a balance sheet rating of A (Excellent) from A.M. Best. Aspen employs approximately 1,200 staff globally. The firm's underwriting is driven by a team of senior executives including CEO Mark Cloutier and CFO Christian Dunleavy. Adjacent structures include the Aspen Insurance Foundation, a philanthropic entity that supports community and education initiatives. A notable recent event: in 2023, Aspen announced a strategic partnership with Anser Advisory to expand its construction-focused insurance offerings (per Business Insurance, 2023). Aspen's structural differentiator lies in its hybrid model: it operates as a publicly traded entity (until the 2019 take-private) with the underwriting culture of a Bermuda specialty insurer, combining capital-market access with the risk expertise of a Lloyd's-style syndicate. This structure allows Aspen to write long-tail casualty and short-tail property risks across cycles, a mandate that few firms match.

## Sectors

- Insurance
- Reinsurance
- Property & Casualty
- Specialty Insurance

## Offices

- London, United Kingdom
- Zurich, Switzerland
- New York, United States
- Singapore, Singapore

## People

- Mark Cloutier — Group Chief Executive Officer
- Christian Dunleavy — Group Chief Financial Officer

## Questions

### Who leads investment decisions at Aspen Insurance?

Underwriting and investment decisions at Aspen Insurance are overseen by the executive management team, led by Group CEO Mark Cloutier. The firm's investment portfolio is managed by an internal team, with oversight from the board. Specific investment allocations are not publicly detailed, but the firm holds a portfolio weighted toward fixed income and cash (per public filings).

### What insurance lines does Aspen underwrite?

Aspen underwrites a diversified range of property and casualty insurance, reinsurance, marine, aviation, and specialty lines. Its two main segments are Aspen Insurance (primary insurance) and Aspen Re (reinsurance), covering both short-tail property risks and long-tail casualty exposures (per the firm's website).

### Where does Aspen operate geographically?

Aspen has headquarters in Hamilton, Bermuda, and additional offices in London, Zurich, New York, and Singapore. The firm writes business globally, with a focus on the US, UK, and European markets (per the firm's website).

### How is Aspen related to Apollo Global Management?

In 2019, Apollo Global Management led a consortium to acquire Aspen Insurance for approximately $2.6 billion, taking the firm private. Apollo does not manage Aspen day-to-day, but it holds ownership through its funds. Aspen remains operationally independent with its own management team (per Reuters, 2019).

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- [Ares Real Estate Income Trust Inc.](https://altss.com/profile/ares-real-estate-income-trust-inc)
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Last updated: 2026-06-03T20:00:00.000Z

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