Abigail Johnson

Fidelity posted $15.9 billion in revenue in 2016—its fourth consecutive record year—while assets under administration climbed some 11%, to $5.7 trillion. Yet it is still struggling to stop the bleeding from its actively managed equity mutual funds; investors pulled $58 billion out of the products last year. In response, Johnson, who assumed her father’s chairman title in 2016, is goosing other parts of the business—­lowering fees on passive ­investing products and allowing customers to track their Bitcoin holdings.