Three Israelis -- Teddy Sagi, Gil Shwed and Adam Neumann -- feature prominently on Forbes magazine's third annual list of 100 richest high-tech billionaires in the world for 2017. Teddy Sagi, the founder and owner of gambling software developer Playtech, is the richest Israeli on the list in 69th place. Sagi has an estimated net worth of $3.6 billion. He founded Playtech in 1999 and has built it into a nearly $700 million operation. Sagi sold a 12% slice of Playtech for almost $400 million in 2016; he still owns about 21% of the company. He is currently ranked 630th on Forbes' list of wealthiest billionaires. Shwed, the founder of cybersecurity software giant Check Point, is 85th on the tech list ,with an estimated net worth of $2.9 billion. Shwed, considered the inventor of the modern firewall, founded Check Point in 1993 with Shlomo Kramer and Marius Nacht. He ranks 717th on Forbes' list of wealthiest billionaires. Neumann, who cofounded and serves as the CEO of communal work space giant WeWork, has an estimated net worth of $2.6 billion and is 93rd on the tech list. WeWork, founded in 2010, rents out offices in over 40 cities around the world, providing perks like arcade rooms and beer kegs. Neumann is number 814 on Forbes' list of wealthiest billionaires. At the top of the tech list is Microsoft founder Bill Gates, whose net worth is estimated at $85.4 billion. Jeff Bezos, the founder of Amazon.com, is in second place with an estimated net worth of $81.7 billion, and Facebook CEO Mark Zuckerberg ranks third, with an estimated net worth of $69.6 billion. For the first time on Forbes' annual Richest In Tech list, the 100 richest self-made tech billionaires are worth more than $1 trillion. Their combined net worth of $1.08 trillion is up 21% from last year.