Article from last summer (sorry, CBS):
"Is Jared still involved with the building?
No, because he sold off his stake earlier this year to avoid worries about conflicts of interest.
Jared sold 49.5 percent of its office space to the massive real estate company Vornado. Thirty percent of the building remains vacant"
cbsnews.com/news/what-you-need-to-know-about-666-fifth-avenue/