Tech entrepreneur Elon Musk is on fire right now.
His company SpaceX just ushered in a new era of spaceflight by launching a rocket into space, and then improbably landing it on a floating robotic ship in the Atlantic Ocean.
His electric car company Tesla also just made automobile history by raking in hundreds of thousands of pre-orders — worth about $14 billion in future sales — for its upcoming Model 3.
Musk himself is worth $14.3 billion as of April 2016, though he allegedly doesn’t believe in the word “business.”
Whatever Musk labels his efforts, he sure has entwined himself in a bunch of them — major online payment services, building and launching spacecraft, and trying to cover the world with solar panels, to name a few.
The breadth of his reach is astounding and enough to make anyone feel exhausted.
To cut through that complexity, we’ve highlighted 19 entities that Musk has reportedly founded, cofounded, invested in, or supported in some way.
1. Musk’s first company was Zip2 Corporation — the web’s first Yellow Pages — in 1995.
Musk was 24 when he dropped out of graduate school for physics at Stanford University to launch his first company, Zip2 Corporation— a dot-com media company that supplied maps and business directories to online newspapers.
He linked digital online maps from Navteq to a business directory and created the internet’s first online Yellow Pages.
Four years later, in 1999, Musk sold the company to computer-manufacturer Compaq for $307 million. At that time, it was the largest amount ever paid for an internet company.
2. He founded online payment company X.com in 1999, which eventually merged with PayPal.
The same year Musk sold Zip2, he used $10 million from the sale to found the online financial-services company X.com.
Musk wanted to focus on the new technology of making payments via email, so he merged his company with a competitor called Confinity— which started the online money transfer process PayPal.
In a heated clash of personalities and egos, however, the cofounders of Confinity fired Musk from the board, then renamed the company PayPal.
The online auction company eBay purchased PayPal in 2002 for $1.5 billion.
3. In 1998, Musk invested in IT company Everdream Corporation, which was eventually sold to Dell.
Cofounded in 1998 by Musk’s cousin, Lyndon Rive, Everdream sold desktop management services to small businesses. It also managed and fixed antivirus software, performed data backups, and administered data encryption.
Musk, who was still involved with PayPal at the time, invested in Everdream on the fourth round, according to the Silicon Valley Business Journal.
Rive and his twin brother, Russ, sold the company, headquartered in Fremont, California, to Dell in 2007.
4. In 2002, Musk founded Space Exploration Technologies, also called SpaceX.
In an interview with Inc., Musk explained why this project was one of the most important things to happen on Earth since its birth 4.5 billion years ago:
“There was the advent of single-celled life, multicelled life, the development of plants, then animals,” he said in the article. “On this time scale, I’d put the extension of life to another planet slightly above the transition from life in the oceans to life on land.”
To that end in 2002, Musk founded SpaceX, an aerospace manufacturer in Hawthorne, California, with the goal of making rockets more affordable. He just took a huge step toward that goal by launching and re-landing a Falcon 9 rocket on April 8, 2016.
SpaceX’s Dragon spacecraft became the first commercial spacecraft to shuttle cargo between the International Space Station and Earth in 2012. Musk eventually wants to send humans to space in the Dragon capsule and has plans to send humans to colonize Mars.
He teased his Martian ambitions on Instagram in September 2015, and has said he will describe them in detail in fall 2016.
5. Musk also began the Musk Foundation in 2002 with his younger brother Kimbal.
The Musk Foundation’s goal is award grants that support research into renewable energy, space exploration, education in science and engineering, and childhood diseases and disorders.
According to Inside Philanthropy, the foundation has given out a total of $783,700, including a donation of $250,000 to build a solar-power system in Soma City, in the Fukushima prefecture of Japan, following the tsunami disaster there in 2011.
Given the foundation’s bold ambitions, its low-tech website is pretty hilarious.
6. In 2004, Musk invested in Tesla Motors to change the world of electric cars.
After investing heavily in Tesla Motors, founded by Martin Eberhard and Marc Tarpenning in 2003, Musk joined the company’s board of directors.
Its first car, the Roadster, wowed consumers with its sports-car-like ability to accelerate from 0 to 60 mph in under four seconds and travel about 250 miles on a single charge.
After the 2008 market collapse, Musk took a more active role and became CEO of the company, a position he still holds today.
Their Model S is so good it broke the Consumer Reports rating system. The company has garnered so much excitement for the new affordable Model 3 sedan that it became “the single biggest one-week launch of any product ever.”
7. Musk also owns a stake in small-satellite company Surrey Satellite Technology.
Musk reportedly purchased a 10% stake in this small-satellite provider in early 2005, which “will give SpaceX a window on the thinking of the world’s most successful vendor of small, inexpensive spacecraft and ultimately could provide business for SpaceX,” according to Space News.
Surrey Satellite Technology got its start building amateur radio satellites, and now builds, launches, and operates small spacecraft for weather monitoring, communications, and other purposes.
8. He has invested in fixing our power-grid problems with a solar-power utility called SolarCity.
In keeping with the energy-saving ilk of Tesla, he invested heavily in SolarCity— one of the country’s largest installers of home solar panels — which was founded in 2006 by his cousins Lyndon and Peter Rive. He now acts as chairman of the company.
SolarCity designs and installs solar-powered clean-energy systems. It also audits and builds electric vehicle charging stations. In April 2015, it announced a partnership to incorporate Tesla batteries into a solar-battery backup system.
9. Musk has invested in the question-and-answer site Mahalo.com.
According to Crunchbase, Musk invested in Mahalo when the site was founded in 2007.
Mahalo is like Wikipedia, Ask Jeeves, and Quora all on one website. The site allows people to post and answer questions.
After Google overhauled its search function, however, the company was forced to lay off 10% of its staff in 2011. It has since shifted its strategy to create original how-to videos, plus live, user-generated question-and-answer sessions.
Musk did a series of videos with the website in 2011.
10. Musk invested in online-payment company Stripe, which launched in 2010.
Musk is no longer invested in PayPal, but he is invested in one of its biggest competitors: an online payment startup called Stripe.
The company aims to allow online apps and companies like Lyft and Facebook to accept payments from anyone anywhere.
It was recently valued at $5 billion. It also has a new partnership with Twitter that adds “buy” buttons to tweets.