SOP. Anyone formally connected that might be part of a joint and several liabilities judgement. Makes for deeper pockets but it's not likely to mean much.
He may have been an investor in some Weinstein projects.
It is common practice for civil suits to include anyone who had even tangential connections to the defendant and/or the event. I doubt there is anything more to this than that.
I have no idea tho I'm not an expert on litigation literature
BR article - ( New Window )