Yes, definitely m14x1.5, cone seat, BIG. I have yet to find black ones that look big enough; the nuts the car came with are pretty large.
I finally found official Ford documentation that proves the m14x1.5: http://www.fordparts.com/Commerce/PartDetail.aspx?n=nfVA5WHR1%2btegALlo3C8vg%3d%3d&id=389744058&m=2&search=true&year=2016&make=Ford&model=Edge
EDIT:
I am going to try gorilla automotive 96641bdx locks and 61147bcx lug nuts; those look big enough. I'll update this after I get them and let everyone know how they turn out.
(The gorillla automotive 91147BC nuts are definitely too small (talking about the cone, not the size)).