|Born||1937 (age 81–82)|
|Residence||Portola Valley, California, US|
|Occupation||Real estate developer|
|Net worth||US $ 2.5 billion (October 2018)|
Frances Marion Cook Arrillaga
(m. 1968; her death 1995)
Gioia Fasi Arrillaga
|Children||2, including Laura Arrillaga-Andreessen|
|Relatives||Marc Andreessen (son-in-law)|
John Arrillaga is one of five children born into a lower-middle-class home with his mother, Freida, and father, Gabriel, who traced his roots to the Basque region. He attended Morningside High School in Inglewood, California and graduated in 1955. He attended Stanford University on a basketball scholarship, and was a first-team All-AAWU selection in 1960. He was a member of Delta Tau Delta, and graduated in 1960 with a bachelor's degree in geography .
In the 1960s, Arrillaga and business partner Richard Peery bought California farmland and converted it into office space. They became two of Silicon Valley's biggest commercial landlords with more than 12,000,000 square feet (1,100,000 m2).
In 2006, he sold 5,300,000 sq ft (490,000 m2) of his real estate holdings for roughly $1.1 billion.
Arrillaga is known for his support of Stanford University. The alumni center, the Frances C. Arrillaga Building, is named in memory of his first wife, and other athletic facilities carry his surname. In May 2006, Arrillaga gave $100 million to Stanford.
In 1968, Arrillaga married Frances Marion Cook Arrillaga, a teacher and librarian. She died on October 13, 1995 in her Palo Alto home of lung cancer, aged 54. They had two children together, John Jr and Laura. Their daughter Laura Arrillaga-Andreessen is married to Marc Andreessen, who co-authored the Mosaic and Netscape web browsers, and is co-founder of several web technology enterprises. His son John Arrillaga, Jr. is married to Justine Stamen Arrillaga, founder of the TEAK Fellowship.
- "Forbes profile::John Arrillaga". Forbes. 3 October 2018.
- Mangalindan, JP (7 July 2014). "The secretive billionaire who built Silicon Valley". Fortune. Retrieved 3 October 2018.
- "Basque Studies Debut" (March/April 2007) Stanford Magazine. Retrieved 05 June 2010.
- "Forbes World's Richest People 2003". Forbes. 2003.
- Fainaru-Wada, Mark (2001-02-25). "Silent Partner / Billionaire Arrillaga has quietly been the primary benefactor behind Stanford's athletic success". San Francisco Chronicle.
- "Arrillaga gives $100 million to Stanford in largest single gift ever from individual". Stanford Report. May 26, 2006.
- Stangel, Luke. "John Arrillaga writes $150 million check to Stanford, the largest donation from a living individual ever". Silicon Valley Business Journal. Retrieved 1 July 2013.
- "Deaths:Frances Arrillaga, philanthropist and volunteer". www.paloaltoonline.com. October 13, 1995. Retrieved 3 October 2018.
- "2012 In-Kind Gifts & Special Thanks". TEAK Fellowship. Archived from the original on 21 October 2014. Retrieved 9 October 2014.