Jerry and Rob, the father-and-son duo that run Tishman Speyer, own the iconic 70-story 30 Rock, in addition to all 12 buildings at Rockefeller Center. NBC bought the 1.6 million square feet it occupies at 30 Rock from the Speyers in 1996.

Now, they have some of it back. The Speyers purchased parts of floors 22, 23, 48 and 49 for $145.7 million and parts of floors 25 and 26 for $76.3 million. The deal was recorded in city records.

A third party, the New York City Industrial Development Agency, was also listed in city records as part of the deal. A spokeswoman for the agency, Janel Patterson, said there was a renewed agreement between the city and NBC, which gives the broadcast giant sales-tax breaks at the space. The spokeswoman said she was aware NBC wanted to sell the floors to Tishman Speyer, as long as NBC got a leaseback and retained the sales-tax breaks from the city.

Representatives for Tishman Speyer and NBC would not comment on the sale.

The Speyers bought control of Rockefeller Center in 1996, the same year they sold condominium interest in 30 Rock to NBC for $440 million.

More big deals in this week's Commercial Breaks.