Makan was known for his full-service treatment of clients, even doing things such as picking up their laundry.
In an interview in a 2007 issue of Families in Business magazine, Makan bragged that he had planned a stag party in Las Vegas, edited business school applications for clients' kids and even served as a marriage broker.
Money management was but a small part of the job.
"People care a lot more about us running their life.
They want us to look after them," he said at the time.
In 2014, ICONIQ managed over $1.4 billion in client funds and advised on another $7.6 billion.