Mark Zuckerberg the founder of Facebook, does own Zuckerberg.com and Zuckerberg.net. They both forward to his Facebook page.
Zuckerberg.org was registered back in 2007 under privacy and was parked at Sedo and 1 & 1 domains, the domain registrar where the domain name was registered all these years.
With no emails from Mr.Zuckerberg or anyone else in his family, the domain name dropped and was caught by DropCatch.
Zuckerberg.org closed at $3,149. It will be interesting to see if Mark or someone in his family picked the name up.