Abigail Johnson – $ 13.1 billion
In October 2014 Abigail changed her father on the post of the executive director of the corporation Fidelity Investments, thus presenting the third generation of the family headed Johnson Foundation. Fidelity is the second largest open-end mutual fund in the US (after Vanguard), whose assets are estimated at $ 2 trillion. Abigail came to Fidelity in 1988 as an analyst with a Harvard MBA diploma. She is also the owner of 24% stake in the company.