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(clockwise from top left) Mark Zuckerberg, Sergey Brin, Larry Page, Jeff Bezos
(clockwise from top left) Mark Zuckerberg, Sergey Brin, Larry Page, Jeff Bezos
(clockwise from top left) Shutterstock; Getty Images (3)

Tech stocks soared on Tuesday, and the visionaries who created Amazon, Google, and Facebook reaped the financial benefits: The net worth of Amazon founder and CEO Jeff Bezos, Facebook founder and CEO Mark Zuckerberg, and Google co-founders Larry Page and Sergey Brin each rose by over $1 billion.

Like many billionaire entrepreneurs, the fortunes of these ultra-rich tech executives rise and fall based on the stock prices of the companies they created. Bezos, Zuckerberg, Page, and Brin retain significant ownership of the tech firms they founded, so their net worths have increased by billions as shares of Amazon, Facebook, and Google parent company Alphabet skyrocketed on Tuesday — and through nearly all of 2018, for that matter.

According to the Bloomberg Billionaire Index, which tracks the net worth of the world's richest people, Jeff Bezos, Mark Zuckerberg, Larry Page, and Sergey Brin — currently ranked as the first, third, eighth, and ninth richest people in the world — each made more than $1 billion on paper between the time the stock market opened and closed yesterday.

Here's how much money these tech billionaires made (theoretically) on Tuesday, and how much their net worths have increased so far in 2018 (all data comes from Bloomberg):

Jeff Bezos, Amazon Founder and CEO

Current Net Worth: $151 Billion
Net Worth Increase on July 24: $2.15 Billion
Net Worth Increase in 2018: $52 Billion
World's Richest People Ranking: #1

Mark Zuckerberg, Facebook Founder and CEO

Current Net Worth: $85.3 Billion
Net Worth Increase on July 24: $1.35 Billion
Net Worth Increase in 2018: $12.6 Billion
World's Richest People Ranking: #3

Larry Page, Google Co-Founder

Current Net Worth: $60.3 Billion
Net Worth Increase on July 24: $1.79 Billion
Net Worth Increase in 2018: $7.94 Billion
World's Richest People Ranking: #8

Sergey Brin, Google Co-Founder

Current Net Worth: $58.7 Billion
Net Worth Increase on July 24: $1.76 Billion
Net Worth Increase in 2018: $7.68 Billion
World's Richest People Ranking: #9

Not all tech CEOs have been making billions this week, however. One notable high-profile tech CEO who has actually seen his net worth decline lately is a Elon Musk, the boss of the electric car manufacturer Tesla.

What with a combination of controversial tweets from Elon Musk and Tesla's frantic scramble for cash as it struggles with production of the new Model 3 — its first electric car priced affordably for the masses — Tesla stock has suffered a multi-day slump. And Musk's net worth has dropped accordingly.

Bloomberg data indicates that Elon Musk's net worth is currently $21.4 billion. Musk's net worth was estimated at $22 billion as of Monday morning, but it dipped by roughly $600 million as Tesla shares declined early this week.