[1] In 1874, Atlantic Mutual President John Divine Jones provided the money which established the permanent foundation of the New York Historical Society.
[16] Upon Bogardus' retirement in 1953,[17] Tuttle was elevated to board chairman and Miles F. York became the new president of the Atlantic Mutual and Centennial Insurance Companies.
The Tax Reform Act of 1986 altered the formula under which insurance companies could deduct additions to their financial reserves.
The Internal Revenue Service (IRS) determined that Atlantic Mutual had strengthened its reserves, but the company countered that it had merely engaged in a computational change.
[22] After the construction of the World Trade Center, Atlantic Mutual moved its headquarters from 45 Wall Street to 140 Broadway.
The company was one of many which insured buildings in and around the World Trade Center, and the firm suffered significant losses after the September 11 attacks.
[25] In 2004, the company "scaled down its operations to focus solely on personal lines business, particularly in the high net worth market.
[28] As the largest marine insurance firm in the United States for many years, Atlantic Mutual became involved in some of the most famous shipwrecks in American history.