With the announcement of Alphabet, Brin got a title upgrade, transitioning from overseeing the moonshot factory Google X as "director of special projects" to being president of the new parent company.
All told, Brin is worth about $34.3 billion, according to Forbes.
But Brin comes from humble beginnings. He was born to parents Michael and Eugenia Brin in the Soviet Union during the summer of 1973.
At the time, his father Michael dreamed of being an astrophysicist, but anti-Semitism in Soviet Russia coupled with his Jewish background kept him from those ambitions and even made it hard for him to find work as a mathematician — he ended up working as an economist for a government planning agency, crunching numbers for Soviet propaganda. The family managed to get exit visas and flee the USSR when Sergey was six, but his family's stressful, troubled experience left the Google cofounder with a lasting appreciation for democracy and freedom.
next slide will load in 15 secondsSkip AdSkip Ad(Here he is "hanging out" with whistle-blower Edward Snowden at a 2014 TED conference.)
The Brins ended up in Maryland, and Sergey's parents enrolled him in a Montessori school that emphasized independence and fostering creativity (Google cofounder Larry Page also went to a Montessori school, as did Amazon founder and CEO Jeff Bezos).
Brin first re-visted Moscow when he was 17 on a class trip led by his father. "Thank you for taking us all out of Russia," he told Michael Brin solemnly. Spurred by a blossoming defiant streak, he threw pebbles at a police car, almost getting in serious trouble when the officers inside noticed.
Eventually, Brin earned his bachelor's in mathematics and computer science at the University of Maryland, and then flew west to Stanford to get his PhD. There, his love of high-adrenaline exercise flourished, as he tried out skating, skiing, gymnastics, and even trapeze.
At Stanford, Brin met Larry Page in 1995. The two became close friends, geeking out about computer science. They started collaborating on a search engine they initially called BackRub.
next slide will load in 15 secondsSkip AdSkip AdThey registered the domain Google.com in September 1997 with the mission to organize the world's information. The rest is history.
Both Brin and Page are "burners," meaning they're devout fans of Burning Man, the free-wheeling art festival in the middle of the Nevada desert. They created the first Google Doodle ever in 1998 to let people know they weren't around to do damage control if the site broke. They eventually only approved the hire of former CEO Eric Schmidt after they heard he loved Burning Man, too.
Even as the two cofounders started building what would become a multi-billion dollar company, Brin has remained loud-and-proud about his fitness obsession, counting workout clothes and Vibram barefoot shoes as his typical wardrobe and frequently zipping around on rollerblades, doing yoga stretches during meetings, or walking around on his hands for fun.
As Google ballooned from simply a search engine to a huge company with dozens of diverse projects, Brin has been the mastermind for some of the most ambitious, including self-driving cars, smart contact lenses, and Google Glass.
For a long time, you couldn't spot Brin *without* the computerized glasses. The New York Times reports that Brin may have played a big role in the product's rocky launch, rushing it into the world before it was ready for public scrutiny.
next slide will load in 15 secondsSkip AdSkip AdMeanwhile, Brin married Anne Wojcicki — CEO of genetics company 23andMe and sister of early Google employee Susan Wojcicki — in 2007.
Their wedding entailed inviting guests to a secret location in the Bahamas and they both wore bathing suits for the ceremony, which took place on a sandbar. They have two children together.
Over the years, the techie couple has donated hundreds of millions of dollars to charity, including at least $160 million to Parkinson's research. It's a cause that's particularly important for Brin. The neurodegenerative disease runs in his family — both his great aunt and mother had it — and a test through 23andMe revealed that Brin has a genetic mutation that makes him predisposed.
To lower his chances of getting Parkinson's, Brin started exercising even more intensely than he used to and drinking green tea twice a day. Thanks to his health regime and scientific progress, he estimated in 2010 that he has a roughly 10% chance of getting the diseases.
But not all of Brin's lavish wealth goes to charitable causes. In 2011, he, Page, and Schmidt collectively bought eight private jets. He owns property in New York City's hip West Village and Los Altos in California.
next slide will load in 15 secondsSkip AdSkip AdHe has actually invested quite a bit of money in Los Altos, principally through a real estate investment firm called Passerelle Investment Co which has helped mom-and-pop, kid-friendly stores and cafes spring up or stay in business.
Brin also employs at least 47 people to manage his personal affairs— including a yacht captain, personal shopper, and a former Navy SEAL — through a company called Bayshore Global Management.
Brin hasn't had the kind of smooth-sailing in his love-life as he did in starting a career though. Unfortunately, he and Wojicki's marriage hit the rocks when Brin allegedly had an affair with a fellow Google employee in 2013. The couple officially finalized a divorce in June 2015, after eight years of marriage.
Obviously everyone wants to be successful, but I want to be looked back on as being very innovative, very trusted and ethical," Brin has said. "And ultimately making a big difference in the world.
Those who have known him attest to the fact that he truly does believe in using knowledge and power for the greater good . The Economist once called him the Enlightenment Man for his dedication to using reason and science to solve huge world problems.
next slide will load in 15 secondsSkip AdSkip AdBrin admitted on stage at the 2014 Code Conference that he should never have worked on the company's now-dismantled social network Google+ because he's not very social and, actually, "kind of a weirdo."
But, certainly a rich one, at any rate. After Google delivered a bang-up Q1 earnings report, the stock had its largest one-day rally ever, and both Brin and Page added about $4 billion to their fortunes.
Now that he's president of Alphabet, he'll likely keep spouting innovative ideas to help steer the company. "We are still trying to do things other people think are crazy but we are super excited about," Page wrote about he and Brin's mission in the Alphabet announcement.