Mr. Geffen

But there was no mention of who had bought the nine-room American Thread Building duplex. According to city records, the lucky guy is Lawrence Guffey, a senior managing director of the monolithic Blackstone Group.

On the sales deed, Dreamworks mogul David Geffen happens to be listed as one of Ms. Klein's trustees. Maybe Mr. Geffen and Mr. Guffey are friends: the exec "leads Blackstone's media and communications investment activities." Reached through his office, Guffey had no comment.

Click here or here to read about his colleagues' Manhattan homes.

- Max Abelson