The Banker Behind the Trump Family’s Quick Wall Street Wins

One of the newest tenants of Trump Tower in New York City is a startup investment bank called Dominari Holdings Inc. It’s located only two stories below the headquarters of the Trump Organization—a proximity that Dominari’s president, Kyle Wool, considers a point of pride.

Wool spent years cultivating a relationship with the Trump family, and since last year’s election he’s emerged as a kind of financial fixer for the president’s two eldest sons and a cadre of senior Trump Organization employees. Together they’ve struck a succession of lucrative deals.

Dominari is on the 22nd and 23rd floors, in a ...