"The adjacent property we've agreed to purchase is an investment in our future. We have no immediate plans to develop the property," a Facebook spokesperson told the Almanac.
TE Connectivity, an electronic components manufacturer based in Switzerland, currently has 600 employees and 10 buildings on its Menlo Park campus, located at 300 Constitution Drive. The campus was originally built in 1966 by Raychem.
Spokeswoman Jane Crawford said the agreement includes a multi-year lease back provision, although the company is looking at other locations, too, including within Menlo Park.
"TE has had deep roots in Silicon Valley for close to 50 years. Let me emphasize that this region is important to our future growth and is an innovation hub for TE Connectivity," she said in an email.
The company declined to release other terms of the sale.