Bill Gates

William Henry Gates III (born October 28, 1955) is an American businessman and philanthropist. A pioneer of the microcomputer revolution of the 1970s and 1980s, he co-founded the software company Microsoft in 1975 with his childhood friend Paul Allen. Following Microsoft's initial public offering in 1986 and the subsequent increase in its stock price, Gates became the world's then-youngest billionaire in 1987, at age 31. Forbes magazine ranked him as the world's wealthiest person in their The World's Billionaires list for 18 out of 24 years between 1995 and 2017, including 13 years consecutively from 1995 to 2007. Gates became the first centibillionaire in 1999, when his net worth briefly surpassed US$100 billion. According to Forbes, as of July 2026, his net worth stood at US$106.5 billion, making him the 19th-wealthiest individual in the world.

Born and raised in Seattle, Washington, Gates was privately educated at Lakeside School, where he befriended Allen and developed his computing interests. In 1973, he enrolled at Harvard University, where he took classes including Math 55 and graduate-level computer science courses, but he dropped out in 1975 to co-found and lead Microsoft. He served as its CEO for the next 25 years and also became president and chairman of the board when the company was incorporated in 1981. Succeeded as CEO by Steve Ballmer in 2000, he transitioned to chief software architect, a position he held until 2008. He stepped down as chairman of the board in 2014 and became technology adviser to CEO Satya Nadella and other Microsoft leaders, a position he still holds. He resigned from the board in 2020.

Over time, Gates reduced his role at Microsoft to focus on his philanthropic work with the Bill & Melinda Gates Foundation, the world's largest private charitable organization, which he and his then-wife, Melinda French Gates, co-chaired from 2000 until 2024. Focusing on areas including health, education, and poverty alleviation, Gates became known for his efforts to combat transmissible diseases such as tuberculosis, malaria, and polio. After French Gates resigned as co-chair following the couple's divorce, the foundation was renamed the Gates Foundation, with Gates as its sole chair.

Gates is the founder and chairman of several other companies, including BEN, Cascade Investment, TerraPower, Gates Ventures, and Breakthrough Energy. In 2010, he and Warren Buffett founded the Giving Pledge, whereby they and other billionaires pledged to give at least half their wealth to philanthropy. Named as one of the 100 most influential people of the 20th century by Time magazine in 1999, he has received numerous other honors and accolades, including a Presidential Medal of Freedom, awarded jointly to him and French Gates in 2016 for their philanthropic work. The subject of several documentary films, he published the first of three planned memoirs, Source Code: My Beginnings, in 2025.

William Henry Gates III was born on October 28, 1955, in Seattle, Washington, as the only son of Bill Gates Sr. (1925–2020) and his first wife, Mary Maxwell Gates (1929–1994). His ancestry includes English, German, and Irish/Scots-Irish. His father was a prominent lawyer, and his mother served on the board of directors of First Interstate BancSystem and United Way of America. Gates's maternal grandfather, J. W. Maxwell, was a national bank president. Gates also has an older sister, Kristi (Kristianne), and a younger sister, Libby. He is the fourth of his name in his family, but is known as William Gates III or "Trey" (i.e., three) because his father had the "II" suffix. The family lived in the Sand Point area of Seattle in a home that was damaged by a rare tornado when Gates was 7.

When Gates was young, his parents wanted him to pursue a career in law. During his childhood, his family regularly attended a church of the Congregational Christian Churches, a Protestant Reformed denomination.

Gates was small for his age and was bullied as a child. The family encouraged competition; one visitor reported that "it didn't matter whether it was hearts or pickleball or swimming to the dock; there was always a reward for winning, and there was always a penalty for losing".

At age 13, Gates enrolled in the private Lakeside Prep School. When he was in the eighth grade, the Mothers' Club at the school used proceeds from Lakeside School's rummage sale to buy a Teletype Model 33 ASR terminal and a block of computer time on a General Electric (GE) computer for the students. Gates took an interest in programming the GE system in BASIC, and he was excused from math classes to pursue his interest. He wrote his first computer program on this machine, an implementation of tic-tac-toe that allowed users to play games against the computer. Gates was fascinated by the machine and how it would always execute software code perfectly.

After the Mothers Club donation was exhausted, Gates and other students sought time on systems, including DEC PDP minicomputers. One of these systems was a PDP-10 belonging to Computer Center Corporation (CCC), which banned Gates, Paul Allen, Ric Weiland, and Gates's best friend and first business partner, Kent Evans, for the summer after it caught them exploiting bugs in the operating system to obtain free computer time.

Gates read the January 1975 issue of Popular Electronics, which demonstrated the Altair 8800, and contacted Micro Instrumentation and Telemetry Systems (MITS) to inform them that he and others were working on a BASIC interpreter for the platform. In reality, Gates and Allen did not have an Altair and had not written code for it; they merely wanted to gauge MITS's interest. MITS president Ed Roberts agreed to meet them for a demonstration, and over the course of a few weeks, they developed an Altair emulator that ran on a minicomputer and then the BASIC interpreter.

The demonstration was held at MITS's offices in Albuquerque, New Mexico. It was a success and resulted in a deal with MITS to distribute the interpreter as Altair BASIC. MITS hired Allen, and Gates took a leave of absence from Harvard to work with him at MITS in November 1975. Allen named their partnership "Micro-Soft", a combination of "microcomputer" and "software". Their first office was in Albuquerque. The first employee Gates and Allen hired was their high school collaborator Ric Weiland. They dropped the hyphen within a year and officially registered the trade name "Microsoft" with the Secretary of the State of New Mexico on November 26, 1976. Gates never returned to Harvard to complete his studies.

Microsoft's Altair BASIC was popular with computer hobbyists, but Gates discovered that a pre-market copy had leaked out and was being widely copied and distributed. In February 1976, he wrote An Open Letter to Hobbyists in the MITS newsletter in which he asserted that more than 90% of the users of Microsoft Altair BASIC had not paid Microsoft for it, and the Altair "hobby market" was in danger of eliminating the incentive for any professional developers to produce, distribute, and maintain high-quality software. This letter was unpopular with many computer hobbyists, but Gates persisted in his belief that software developers should be able to demand payment. Microsoft became independent of MITS in late 1976, and it continued to develop programming language software for various systems. The company moved from Albuquerque to Bellevue, Washington, on January 1, 1979.

Gates said he personally reviewed and often rewrote every line of code that the company produced in its first five years. As the company grew, he transitioned into a manager role, then an executive. His ideas about programming and memories of the Altair BASIC project are described in the book Programmers at Work, a collection of interviews published by Microsoft Press in 1986.

IBM, the leading supplier of computer equipment to commercial enterprises at the time, approached Microsoft in July 1980 concerning software for its upcoming personal computer, the IBM PC, after Gates's mother mentioned Microsoft to John Opel, IBM's then CEO. IBM first proposed that Microsoft write the BASIC interpreter. IBM's representatives also mentioned that they needed an operating system, and Gates referred them to Digital Research (DRI), makers of the widely used CP/M operating system. IBM's discussions with Digital Research went poorly, and they did not reach a licensing agreement. IBM representative Jack Sams mentioned the licensing difficulties during a subsequent meeting with Gates and asked if Microsoft could provide an operating system. A few weeks later, Gates and Allen proposed using 86-DOS, an operating system similar to CP/M, that Tim Paterson of Seattle Computer Products (SCP) had made for hardware similar to the PC. Microsoft made a deal with SCP to be the exclusive licensing agent of 86-DOS, and later the full owner. Microsoft employed Paterson to adapt the operating system for the PC and delivered it to IBM as PC DOS for a one-time fee of $50,000.

Since leaving day-to-day operations at Microsoft, Gates has continued his philanthropy and works on other projects. He stepped down as chairman of Microsoft in February 2014 to become a technology advisor at the firm to support newly appointed CEO Satya Nadella.

Gates provided his perspective on a range of issues in an interview that was published in the March 2014 issue of Rolling Stone magazine. In the interview, he provided his perspective on climate change, his charitable activities, various tech companies and people involved in them, and the state of America. In response to a question about his greatest fear when he looks 50 years into the future, Gates stated: "there'll be some really bad things that'll happen in the next 50 or 100 years, but hopefully none of them on the scale of, say, a million people that you didn't expect to die from a pandemic, or nuclear or bioterrorism." Gates also identified innovation as the "real driver of progress" and pronounced that "America's way better today than it's ever been." Gates has often expressed concern about the potential harms of superintelligence; in a Reddit "ask me anything", he stated that:

First the machines will do a lot of jobs for us and not be super intelligent. That should be positive if we manage it well. A few decades after that though the intelligence is strong enough to be a concern. I agree with Elon Musk and some others on this and don't understand why some people are not concerned.

In an interview that was held at the TED conference in March 2015, with Baidu co-founder and CEO, Robin Li, Gates said he would "highly recommend" Nick Bostrom's recent work, Superintelligence: Paths, Dangers, Strategies. During the conference, Gates warned that the world was not prepared for the next pandemic, a situation that would come to pass in late 2019 when the COVID-19 pandemic began. In March 2018, Gates met at his home in Seattle with Mohammed bin Salman, the crown prince and de facto ruler of Saudi Arabia, to discuss investment opportunities for Saudi Vision 2030. In June 2019, Gates admitted that losing the mobile operating system race to Android was his biggest mistake. He stated that it was within their skill set of be the dominant player, but partially blames the antitrust litigation during that time. That same year, Gates became an advisory board member of the Bloomberg New Economy Forum.

In March 2020, Microsoft announced Gates would be leaving his board positions at Berkshire Hathaway and Microsoft to dedicate himself to philanthropic endeavors such as climate change, global health and development, and education. The Wall Street Journal reported in May 2021 that Gates stepped down before Microsoft's board finished its investigation into Gates's alleged inappropriate sexual relationship with a Microsoft employee, which an external law firm had begun probing in late 2019.

Gates considers climate change and global access to energy to be critical, interrelated issues. He has urged governments and the private sector to invest in research and development to make clean, reliable energy cheaper. Gates envisions that a breakthrough innovation in sustainable energy technology could drive down both greenhouse gas emissions and poverty, and bring economic benefits by stabilizing energy prices. In 2011, he said, "If you gave me the choice between picking the next 10 presidents or ensuring that energy is environmentally friendly and a quarter as costly, I'd pick the energy thing."

In 2015, he wrote about the challenge of transitioning the world's energy system from one based primarily on fossil fuels to one based on sustainable energy sources. Global energy transitions have historically taken decades. He wrote, "I believe we can make this transition faster, both because the pace of innovation is accelerating, and because we have never had such an urgent reason to move from one source of energy to another." This rapid transition, according to Gates, would depend on increased government funding for basic research and financially risky private-sector investment, to enable innovation in diverse areas such as nuclear energy, grid energy storage to facilitate greater use of solar and wind energy, and solar fuels.

Gates spearheaded two initiatives that he announced at the 2015 United Nations Climate Change Conference in Paris. One was Mission Innovation, in which 20 national governments pledged to double their spending on research and development for carbon-free energy in over five years' time. Another initiative was Breakthrough Energy, a group of investors who agreed to fund high-risk startups in clean energy technologies. Gates, who had already invested $1 billion of his own money in innovative energy startups, committed a further $1 billion to Breakthrough Energy. In December 2020, he called for the U.S. federal government to create institutes for clean energy research, analogous to the National Institutes of Health. Gates has also urged rich nations to shift to 100% synthetic beef industries to reduce greenhouse gas emissions from food production.

Gates has been criticized for holding a large stake in Signature Aviation, a company that services emissions-intensive private jets. In 2019, he began to divest from fossil fuels. He does not expect divestment itself to have much practical impact, but says that if his efforts to provide alternatives were to fail, he would not want to personally benefit from an increase in fossil fuel stock prices. After he published his book How to Avoid a Climate Disaster, parts of the climate activist community criticized Gates's approach as technological solutionism. In 2022, educational streamer Wondrium produced the series "Solving for Zero: The Search for Climate Innovation", inspired by the book.

In June 2021, Gates's company TerraPower and Warren Buffett's PacifiCorp announced the first sodium nuclear reactor in Wyoming. Wyoming Governor Mike Gordon hailed the project as a step toward carbon-negative nuclear power. Wyoming Senator John Barrasso also said that it could boost the state's once-active uranium mining industry.

Gates is an avid reader, and the ceiling of his large home library is engraved with a quotation from The Great Gatsby. He also enjoys bridge, golf, and tennis. His days are planned for him on a minute-by-minute basis, similarly to the U.S. president's schedule. Despite his wealth and extensive business travel, Gates flew coach (economy class) in commercial aircraft until 1997, when he bought a private jet.

In the 1990s, Gates built an earth-sheltered mansion, designed by James Cutler and Peter Bohlin, in the side of a hill overlooking Lake Washington in Medina, Washington. The estate has been nicknamed "Xanadu 2.0" by Gates's biographers. In 2009, property taxes on the mansion were reported to be US$1.063 million, on a total assessed value of US$147.5 million. The 66,000-square-foot (6,100 m2) estate has a 60-foot (18 m) swimming pool with an underwater music system, as well as a 2,500-square-foot (230 m2) gym and a 1,000-square-foot (93 m2) dining room.

Gates and financier Jeffrey Epstein were acknowledged to have first met in 1992, but would only start to have more frequent contact later on. A 2019 New York Times article reported that Gates's relationship with Epstein started in 2011, a few years after Epstein was convicted for procuring a child for prostitution, and continued for some years, including a visit to Epstein's house with his wife in the fall of 2013, despite her declared discomfort. Gates said in 2011 about Epstein: "His lifestyle is very different and kind of intriguing although it would not work for me".

The depth of the friendship between Gates and Epstein is unclear though Gates generally commented that "I met him. I didn't have any business relationship or friendship with him". However, Gates visited Epstein "many times, despite [Epstein's] past". It was reported that Epstein and Gates "discussed the Gates Foundation and philanthropy". Gates stated "Every meeting where I was with him were meetings with men. I was never at any parties or anything like that. He never donated any money to anything that I know about." In August 2021, Gates said the reason he had meetings with Epstein was because Gates hoped Epstein could provide money for philanthropic work, though nothing came of the idea. Gates added, "It was a huge mistake to spend time with him, to give him the credibility of being there." According to a fact check published by Reuters in 2020, Gates appears in the flight logs for the Lolita Express once in 2013, and there is no record of him ever travelling to Little Saint James.

It has also been reported that Epstein and Gates met with Nobel Committee chair Thorbjørn Jagland at his residence in Strasbourg, France, in March 2013 to discuss the Nobel Prize. Also in attendance were representatives of the International Peace Institute which has received millions in grants from the Gates Foundation, including a $2.5 million "community engagement" grant in October 2013. In 2023, it was reported that Epstein threatened to expose an alleged affair Gates had with a Russian bridge player.

In December 2025, Gates appeared in two photos released by the House Oversight and Government Reform Committee from documents in Jeffrey Epstein's estate. These photos were part of thousands of other files ordered to be released pursuant to the Epstein Files Transparency Act.

In January 2026, unsealed Epstein files revealed two 2013 draft emails by Epstein alleging Gates' extramarital affairs with "Russian girls" and "married women", resulting in him contracting an STD, and that an associate secretly obtained antibiotics for Melinda Gates while facilitating encounters. The emails accused Gates of ending their friendship after a failed Gates Foundation–JPMorgan deal and mentioned Epstein's resignation amid marital disputes and inappropriate activities. Unclear if sent and uncorroborated, the allegations were denied by Gates' spokesperson as "absolutely absurd and completely false", stemming from Epstein's frustration and efforts to "entrap and defame". It was also revealed that the emails by Epstein which involved discussion about Gates possibly contracting an STD and in need of antibiotics were in fact written on behalf of Boris Nikolić, an aggrieved employee of Gates who served as the Gates Foundation's chief advisor of science and technology, and was also planning to resign. Nikolic resigned from the Gates Foundation in 2014, and would also go on to serve as an executor to Epstein's estate.

Time magazine listed Gates as one of the 100 most influential people of the 20th century in 1999, as well as one of the 100 most influential people in 2004, 2005, and 2006 respectively.

Time also collectively named Gates, his wife Melinda and U2's lead singer Bono as the 2005 Persons of the Year for their humanitarian efforts. In 2006, he was voted eighth in the list of "Heroes of our time" published by New Statesman.

Gates was listed in the Sunday Times power list in 1999, named CEO of the year by Chief Executive Officers magazine in 1994, ranked number one in the "Top 50 Cyber Elite" by Time in 1998, ranked number two in the Upside Elite 100 in 1999, and was also included in The Guardian as one of the "Top 100 influential people in media" in 2001.

Gates has received honorary doctorates from Nyenrode Business Universiteit (1996), KTH Royal Institute of Technology (2002), Waseda University (2005), Tsinghua University (2007), Harvard University (2007), the Karolinska Institute (2007), the University of Cambridge (2009), and Northern Arizona University (2023). He was also made an honorary trustee of Peking University in 2007.

In 1994, he was honored as the 20th Distinguished Fellow of the British Computer Society (DFBCS). In 1999, Gates received New York Institute of Technology's President's Medal.