SUNNYVALE — A big tech company has added two Sunnyvale buildings to its shopping spree for Silicon Valley properties in a purchase that shows the tech industry still hungers for prime South Bay real estate.

Fortinet has paid $10 million for two research and office buildings in Sunnyvale, according to documents filed on May 30 with the Santa Clara County Recorder’s Office.

With the latest deals, Sunnyvale-based Fortinet has now spent well over a half-billion dollars to collect an array of properties in the South Bay and East Bay.

The just-bought buildings have addresses of 130 and 139 Kifer Court in Sunnyvale, the county documents show.

Fortinet has paid $562.9 million to buy primarily nondescript office, research, or industrial buildings in Sunnyvale and Union City, according to this

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