# American Centennial Insurance Company

American Centennial Insurance Company is an Insurance based in Wilmington, United States.

## Overview

- **Organization type:** Insurance
- **Headquarters:** Wilmington, United States
- **Region:** North America
- **Address:** Wilmington, DE, United States
- **Assets under management:** Undisclosed
- **Website:** https://aimagency.com

## Regulatory record

- **Reports private funds:** No

## About

American Centennial Insurance Company is a US-based insurance company headquartered in Wilmington. It oversees approximately $29 million in assets across one fund, primarily focused on North America.

## Sectors

- Insurance

## Offices

- Philadelphia, PA, United States

## People

- Warren Buffett — Chairman and CEO of parent company Berkshire Hathaway Inc.
- Tracy L. Gulden — Director and Senior Vice President at National Indemnity Company
- Nancy F. Peters — Director

## Questions

### Who controls investment decisions for American Centennial's float?

Investment allocation is directed by Berkshire Hathaway's Omaha headquarters, where Warren Buffett and his portfolio managers — Todd Combs and Ted Weschler — deploy insurance float across public equities and private opportunities. American Centennial does not maintain its own investment committee; premiums flow upward into the parent's consolidated capital pool alongside float from GEICO, General Re, and the broader National Indemnity group.

### How did American Centennial come under Berkshire Hathaway's ownership?

Berkshire Hathaway acquired American Centennial from White Mountains Insurance Group in 2008, folding it into the National Indemnity subsidiary group. The purchase reflected Berkshire's ongoing strategy of acquiring specialty carriers that generate underwriting discipline and durable float, rather than pursuing market-share growth through aggressive premium pricing.

### What lines of insurance does American Centennial underwrite?

The carrier writes commercial property-casualty lines, with confirmed participation in workers' compensation and rate-regulated markets through its membership in the Pennsylvania Compensation Rating Bureau and North Carolina Rate Bureau. Precise book composition beyond these bureau memberships is not separately disclosed from the broader National Indemnity group reporting.

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Last updated: 2026-08-10T23:49:37.812Z

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