Elon Reeve Musk (born June 28, 1971), a South African-born American entrepreneur, founded SpaceX on March 14, 2002, with roughly 100 million dollars of his own money[1][2] and serves as its chief executive officer, chief technical officer, and chairman of the board.[4] The company developed the first orbital-class reusable rockets under his direction[1][2] and had flown roughly 650 orbital launches by March 31, 2026.[4]

SpaceX under Musk also became NASA's primary crew transportation provider, built the world's largest satellite constellation, and is flight-testing Starship, the largest rocket ever flown, which first reached orbit in September 2026,[36] toward his stated goal of establishing a self-sustaining settlement on Mars.[1][2] Musk is also the chief executive of electric carmaker Tesla and controls several other companies, including the artificial intelligence firm SpaceXAI and the social platform X. His business record, political activity, and public statements have made him one of the most closely watched and most polarizing figures in technology. SpaceX's stock market listing in June 2026 pushed his paper fortune above one trillion dollars, the first time any individual fortune had been valued that highly, though the figure has since swung by hundreds of billions with the share price.[25][26] This article focuses on his role in space exploration.

Early life and first companies

Musk was born on June 28, 1971, in Pretoria, South Africa. He taught himself programming as a child and sold a video game he wrote at age 12. He left South Africa for Canada in 1989, then transferred to the University of Pennsylvania, earning bachelor's degrees in economics and physics in 1997. He enrolled in a Stanford graduate program in 1995 but left within days to start his first company.[1][2]

That company, the online city-guide firm Zip2, sold to Compaq in 1999 for about 307 million dollars. Musk then co-founded the online bank X.com, which merged into what became PayPal; eBay bought PayPal in 2002 for 1.5 billion dollars, leaving Musk, its largest shareholder, with the fortune he would soon spend on rockets.[1][2]

Founding SpaceX

Around 2001 Musk began exploring a project called Mars Oasis, a plan to land a small greenhouse on Mars to rekindle public interest in exploration. Trips to Russia to buy a refurbished missile as a launcher convinced him that launch prices, not public interest, were the limiting factor, and that a new company could build rockets far more cheaply than the incumbents. He founded Space Exploration Technologies Corp. on March 14, 2002, and invested roughly 100 million dollars of his own money.[1][2] He has said since that he expected to lose it, putting the odds that either SpaceX or Tesla would survive at around 10 percent.[32]

The gamble nearly failed. SpaceX's small Falcon 1 rocket failed on its first three flights, and by 2008 both SpaceX and Tesla were close to bankruptcy. On September 28, 2008, the fourth Falcon 1 reached orbit, making SpaceX the first private company to put a liquid-fueled rocket into Earth orbit, and in December NASA awarded SpaceX a 1.6 billion dollar cargo resupply contract that Musk has credited with saving the company.[1][2][4]

Role at SpaceX

SpaceX's IPO prospectus lists Musk as the company's founder, chief executive officer, chief technical officer, and chairman of the board, roles it says he has held since May 2002. Gwynne Shotwell is president and chief operating officer.[4] NASA identified him as SpaceX's "Chief Executive Officer and Chief Designer" at a 2012 briefing ahead of the company's first Dragon flight to the space station,[27] and a biography SpaceX supplied for a 2011 congressional hearing described his role the same way: "At SpaceX, Elon is the chief designer, overseeing development of rockets and spacecraft for missions to Earth orbit and ultimately to other planets."[35]

Colleagues and biographers describe him as directly involved in major design choices, from engine architecture to structures and materials.[1][2] The clearest documented example is the switch of Starship from carbon composite to stainless steel, which he announced and defended publicly in December 2018 on the grounds that steel is slightly better than composite in strength-to-weight terms at cryogenic temperatures, "vastly better" at high temperatures, needs much less thermal protection on reentry, and costs a fraction as much.[17]

The prospectus is also explicit about the limits of that involvement. It states that "although Mr. Musk devotes significant time to our businesses and is highly active in our management, he does not devote his full time and attention to our businesses and devotes time and attention to other significant roles", naming Tesla, Neuralink, and The Boring Company, and it lists dependence on him as a key-person risk for which SpaceX carries no insurance.[4]

His pay is tied directly to the Mars goal. On January 13, 2026, SpaceX's board granted him one billion performance-based restricted Class B shares that vest only if the company both clears 15 market-capitalization milestones and establishes "a permanent human colony on Mars with at least one million inhabitants". A separate grant of about 302 million shares depends on market-capitalization milestones plus completion of non-Earth-based data centers delivering 100 terawatts of compute a year. As of March 31, 2026, SpaceX judged both performance conditions improbable and had recorded no expense for either award.[4]

Key program decisions

Reusability was the central program decision of Musk's tenure at SpaceX. Against prevailing industry judgment that recovering orbital boosters could not pay, he directed the company to land and refly Falcon 9 first stages. The first successful landing came on December 21, 2015, and the first reflight of a recovered booster on March 30, 2017.[20][21] By March 31, 2026, the company counted roughly 650 orbital launches, more than 540 of them flown on a previously used booster, and said Falcon rockets had carried more than 80 percent of the world's payload mass to orbit every year since 2023.[4] The fleet-leading booster made its 36th flight on July 9, 2026,[22] and its 37th on August 25.[37] SpaceX flew 78 missions in the first half of the year.[5] The Dragon spacecraft that rides those boosters carried astronauts for the first time in May 2020 under NASA's Commercial Crew Program, the first crewed orbital flight by a private company, and continues to serve the International Space Station.[2]

A second decision was Starlink, approved in 2015 as a way to fund Mars development with satellite internet revenue. About 11,150 Starlink satellites were in orbit in mid-October 2026.[28] SpaceX reported 12.0 million subscribers at the end of the second quarter of 2026, double a year earlier, and 4.3 billion dollars of connectivity revenue for the quarter, which made Starlink both SpaceX's largest business by revenue and the only one of its three segments reporting operating income.[5]

The third is Starship, a fully reusable two-stage vehicle designed to lift more than 100 tonnes. Musk pushed unconventional calls that defined the program: methane-fueled Raptor engines, stainless steel construction instead of carbon fiber, rapid build-test-fly iteration at the Starbase site in South Texas, and catching returning boosters with the launch tower. Fourteen integrated test flights have flown since April 2023. Flight 12, on May 22, 2026, introduced the larger Version 3 design,[6] and Flight 13, on July 24, 2026, released 20 Starlink satellites and ended with the ship intact and afloat after the softest splashdown of the program, though the booster was again lost.[23] Flight 14, on September 28, 2026, was the first to reach orbit. Despite early engine shutdowns on both stages, the ship deployed 26 Starlink V3 satellites before controllers cut the planned six-orbit mission short and brought it down north of Hawaii about three hours after launch, where it tipped over and exploded after splashdown; the booster made a controlled splashdown in the Gulf of Mexico.[36][38] NASA selected Starship in April 2021, under a 2.89 billion dollar firm-fixed-price award, as the crewed lunar lander for the Artemis program,[18] which flew astronauts around the Moon in April 2026.[19] Under plans revised in 2026, Artemis 3 is to test Orion docking with lander test articles, including a Starship, in low Earth orbit in 2027 rather than land, and the first crewed landing attempt is Artemis 4, planned for 2028.[33][39][42]

In September 2026 Musk said the Version 3 design "is capable of full reusability",[40] and at the All-In Summit on September 14 he said SpaceX might try to catch a returning ship with the launch tower on Flight 15,[41] which had no confirmed launch date in mid-October.[42] On August 25, SpaceX and Louisiana officials announced a planned 100 billion dollar Starship launch site on former Exxon land in Vermilion Parish, with construction expected to begin in 2027 and a first launch targeted for as early as 2029.[43] Musk wrote on X that "Starbase Louisiana will ultimately have over a dozen launch towers, enabling more than 30 Starship flights per day".[40]

SpaceX milestones under Musk

YearMilestone
2002Founds SpaceX with roughly 100 million dollars of his own money
2008Falcon 1 reaches orbit; NASA cargo contract
2012Dragon is first commercial spacecraft to berth with the ISS
2015First landing of an orbital-class booster
2017First reflight of a recovered orbital booster
2020Demo-2, first private crewed orbital flight
2021NASA selects Starship as Artemis lunar lander
2023First integrated Starship flight test
2026SpaceX absorbs xAI; Starship Version 3 debut, first satellite deployment and first orbital flight; Nasdaq listing in the largest IPO on record

Going public and Musk's control

SpaceX listed on the Nasdaq on June 12, 2026, under the ticker SPCX, selling 555.6 million shares at 135 dollars each and raising about 75 billion dollars, the largest initial public offering on record.[24] The stock closed its first day at 160.95 dollars, up 19 percent, and the paper value of Musk's stake made him the first person credited with a fortune above one trillion dollars.[25]

The listing did not loosen his grip on the company. SpaceX uses a dual-class structure in which Class B shares carry ten votes and Class A shares one. Musk held 849,494,440 Class A and 5,219,053,075 Class B shares at the offering price, about 82.4 percent of total voting power immediately after the sale, and Class B holders elect a majority of the board. The prospectus states plainly that he "will have the power to control the outcome of matters requiring shareholder approval, including election of all our directors, and to control our business and affairs".[4] All of his shares are subject to a 366-day lock-up, with no early release, that expires in June 2027.[4] In a Schedule 13G filed on August 13, 2026, he reported beneficial ownership of about 6.42 billion shares as of June 30, counting his Class B shares (including about 1.3 billion unvested performance shares) and 350 million Class B shares obtainable through exercisable options as if converted to Class A stock; on that basis he held 48.4 percent of the Class A stock.[44]

What the listing did change is that SpaceX now reports its finances quarterly and its share price moves in public. Musk's fortune peaked near 1.33 trillion dollars on June 16, 2026, then fell to about 684 billion by August 1 as SpaceX shares dropped 46 percent from their June high ahead of an unlock of 911.5 million restricted shares.[26] The stock fell further after the company's first earnings report on August 4 showed capital spending more than twice its revenue.[49] The shares then recovered about 58 percent from their early-August low; a close of 171.09 dollars on October 5, the highest since mid-June, put Musk's paper fortune back above one trillion dollars,[45] though the Bloomberg Billionaires Index had it below that mark again, at 987 billion dollars, three days later.[46]

The Mars goal

Musk has framed SpaceX's purpose since its founding as making humanity multiplanetary, arguing that a self-sustaining city on Mars is insurance against civilization-ending events on Earth. He presented an architecture for Mars settlement at the International Astronautical Congress in Guadalajara on September 27, 2016: a 122-meter methane-fueled Interplanetary Transport System of reusable boosters, ships carrying more than 100 people, and tankers to refuel them in Earth orbit, with development costed at roughly 10 billion dollars and a stated aim of a million people on Mars within 40 to 100 years.[14]

A year later, at the 2017 congress in Adelaide, he presented a smaller version: 9 meters in diameter instead of 12, 106 meters tall, 31 engines instead of 42, and intended to replace Falcon 9, Falcon Heavy, and Dragon with a single vehicle whose commercial work would pay for the Mars campaign.[15][16] The design was renamed Starship in 2018 and shifted from carbon composite to stainless steel that December.[17]

Design detail2016 Guadalajara plan[14]2017 Adelaide revision[15][16]
Height122 meters106 meters
Diameter12 meters9 meters
Engines4231
Intended roleMars transport system with ships carrying more than 100 peopleSingle vehicle to replace Falcon 9, Falcon Heavy, and Dragon

The hard dependency in every version of the plan is orbital refueling. A Mars-bound Starship needs roughly 1,200 tonnes of propellant, about 933 tonnes of liquid oxygen and 267 tonnes of methane, which the consultant Donald Rapp has estimated at roughly a dozen tanker flights for every departing ship. SpaceX has transferred propellant between tanks inside a single vehicle but had not demonstrated a ship-to-ship transfer as of mid-October 2026.[7][42] Starship first reached orbit on its 14th flight, on September 28, 2026; the earlier test flights that released Starlink satellites did so on suborbital trajectories.[23][36]

Stated Mars timelines

Musk's target dates have consistently run ahead of what SpaceX delivered. He has often labeled them aspirational at the time he gave them.

StatedTarget given at the timeWhat followed
September 2016A robotic Dragon lander on Mars as early as 2018; crewed ships aspiring to launch in late 2024No Dragon Mars mission flew, and the vehicle design was replaced the next year[7][16]
September 2017Two uncrewed cargo ships in 2022, two crewed ships in 2024No Mars launch. Musk called the schedule "aspirational" when he presented it[15]
May 202550-50 odds of sending uncrewed Starships in the late 2026 transfer windowDropped in February 2026 in favor of the Moon.[13] The window opens in late October 2026 with no ship-to-ship refueling demonstration yet flown; the next opens in late 2028.[42]
February 2026A lunar city in under 10 years; a Mars city started in about five to seven yearsA stated intention; no mission has been scheduled[9][13]

The shift to the Moon

On February 8, 2026, Musk wrote that "SpaceX has already shifted focus to building a self-growing city on the Moon, as we can potentially achieve that in less than 10 years, whereas Mars would take 20-plus years", adding that the company "will also strive to build a Mars city and begin doing so in about five to seven years".[13] His stated reason was iteration speed: lunar launch opportunities come roughly every 10 days with a two-day transit, while Mars windows open about every 26 months with a six-month crossing.[9][13] Reporting at the time said SpaceX had dropped the late-2026 Mars window and was aiming instead at an uncrewed lunar landing demonstration as early as March 2027.[13]

FactorThe MoonMars
Launch opportunitiesRoughly every 10 daysAbout every 26 months[9][13]
Transit timeAbout two daysAbout six months[9][13]
Stated city timelineUnder 10 years20-plus years; a start in about five to seven years[13]

He has since sketched a larger lunar program. On SpaceX's August 2026 earnings call he described robotic satellite factories on the Moon, saying the idea "sounds like super sci-fi right now, but it's going to happen", and argued that manufacturing and generating power off Earth could eventually scale far beyond what the planet's surface allows.[29] None of it is a plan of record: no mission toward a lunar city or to Mars has been scheduled, and the near-term program remains Starship flight testing, reuse, and refueling.[7][23]

Tesla and other ventures

Musk joined Tesla as an early investor and chairman in 2004 and became CEO in 2008; the company's Model S, Model 3, and Model Y helped move electric cars into the mainstream, and it now also builds the Optimus humanoid robot. He co-founded Neuralink (brain-computer interfaces) and The Boring Company (tunneling), bought Twitter for 44 billion dollars in 2022 and renamed it X, and founded the AI company xAI in 2023, which absorbed X in a 2025 all-stock deal.[1][2] SpaceX acquired xAI on February 2, 2026, in a stock-for-stock deal that valued the AI firm at about 250 billion dollars and the combined business at 1.25 trillion; the AI arm was renamed SpaceXAI in July 2026, while the parent kept the SpaceX name.[10][11] On October 4, 2026, Musk said the unit would be renamed again, as SpaceXSI, after President Donald Trump ordered federal agencies to call artificial intelligence "super intelligence".[47] On SpaceX's August 2026 earnings call Musk announced Starmind, a planned constellation of AI-compute satellites developed with NVIDIA, saying SpaceX and its AI unit would rely exclusively on NVIDIA chips;[12] later that month he said SpaceX planned to put its first data center in space by the end of 2027.[43] AI Wiki's Elon Musk article covers his AI ventures in more detail. His compensation, workplace practices, and regulatory clashes, including a 2018 securities-fraud settlement with the SEC that cost him Tesla's chairmanship, have drawn repeated litigation and press scrutiny.[1]

Government service and politics

Musk spent heavily in support of Donald Trump's 2024 presidential campaign and, from January to May 2025, served as a special government employee leading the Department of Government Efficiency (DOGE), a cost-cutting initiative. He left the role on May 30, 2025, and had a brief, public falling-out with Trump in June 2025, for which he later expressed regret.[3][8] In July 2025 he said he had formed a new political party, the America Party;[30] as of August 2025 he had not filed the paperwork to register it with the Federal Election Commission, and no candidates had run under it.[34] He returned to running his companies full time, though he has kept spending on politics: by the end of June 2026 he had committed at least 90 million dollars to Republican campaigns in the midterm cycle, more than any other individual donor.[31] Figures his representatives released in October showed more than 276 million dollars in further gifts to Republican groups since July, including 158 million dollars to the Senate Leadership Fund, which brought his known federal political giving in the cycle to about 366 million dollars; by then he and Trump had repaired their relationship.[48] On September 30, 2026, Defense Secretary Pete Hegseth named Musk one of three leaders of Project Meridian, a 120-day Pentagon study of future warfare, alongside Anduril co-founder Palmer Luckey and former House Speaker Newt Gingrich.[45][50] The Pentagon did not say whether Musk would serve as a special government employee or as a contractor.[50] His political spending and statements, and content-moderation decisions at X, remain subjects of controversy in the United States and Europe; supporters credit him with reviving American launch capability, while critics fault his management style and public conduct.[1][3]

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