Twitter is now owned by Elon Musk — here’s a brief history from the app’s founding in 2006 to the present
In this photo illustration, former U.S. President Donald Trump’s archived Twitter account is shown on a phone screen with the Twitter logo in the background.
Sheldon Cooper | Lightrocket | Getty Images
A decade ago, Twitter’s future was looking bright. The company was benefiting from a flood of funding into the social-networking space, eventually leading to an IPO in 2013 that raised $1.8 billion.
Now the company is back in private hands. And they happen to be the hands of Elon Musk, the richest person in the world and one of the app’s most high-profile provocateurs.
It’s a massive moment. Twitter has become a key place for people to debate, joke and pontificate in their own circles of politics, sports, tech and finance. It’s also served as a platform that gives voice to the voiceless, helping protesters organize and express themselves in repressed regimes around the world.
In recent years, however, Twitter and social media rivals like Facebook have been at the center of controversy over the distribution of fake news and misinformation, sometimes leading to bullying and violence.
Investors had grown concerned about Twitter as a business. The company was generally unprofitable, struggled to keep pace with Google and Facebook, and often killed popular products with no real explanation.
What follows is a brief history of Twitter, which — despite its many flaws — is one of the most iconic companies to come out of Silicon Valley in the past 20 years.
2006
In March, Jack Dorsey, Noah Glass, Biz Stone, and Evan Williams created Twitter, which was originally a side project stemming from the podcasting tool Odeo. That month, Dorsey would send the first Tweet that read, “just setting up my twttr.”
2007
In July, Twitter received a $100,000 Series A funding round led by Union Square Ventures. The app’s popularity started to explode after being heavily promoted by the tech community during the annual South by Southwest conference.
2008
Dorsey stepped down as CEO in October, and was replaced by Williams. According to the book “Hatching Twitter” by journalist Nick Bilton, Twitter’s board fired Dorsey over concerns about the executive’s management style and public boastings.
2009
Twitter’s popularity continued to soar, leading to a high-profile appearance from Williams on Oprah Winfrey’s talk show alongside celebrity Ashton Kutcher. Kutcher would also write about Williams and Stone as part of Time Magazine’s Time 100 issue. Twitter was now a mainstream phenomenon.
2010
Twitter reached space, with NASA Astronaut Timothy Creamer sending the first tweet live from outer orbit. Behind the scenes, however, management woes continued with Williams stepping down as CEO, replaced by operating chief Dick Costolo.
2011
Twitter became an essential social media tool used during the Arab Spring, the wave of antigovernmental protests throughout Egypt, Libya and Tunisia. Protesters used the site to post reports and to organize. As the Pew Research Center noted, Twitter’s role in “disseminating breaking news” was not “not limited to the Arab uprisings – the death of Whitney Houston, for example, was announced on Twitter 55 minutes prior to the AP confirming the story.”
2012
Twitter’s reach expanded to 200 million active users. Barack Obama used the “platform to first declare victory publicly in the 2012 U.S. presidential election, with a Tweet that was viewed approximately 25 million times on our platform and widely distributed offline in print and broadcast media,” according to corporate filings.
2013
Twitter went public in November. The combined wealth of Williams, Dorsey, and Costolo hit roughly $4 billion.
“I think we’ve got a tremendous set of thoughts and strategies to increase the slope of the growth curve,” Costolo told CNBC at the time. “I would consider some of them tactics, some of them broader strategies, in service of doing what I referred to as bridge the gap between the massive awareness of Twitter and deep engagement of the platform.”
2014
Slowing user growth led to several stock drops and analyst downgrades. Twitter also deemed 2014 the year of the “selfie.”
2015
Compared to rivals like Google, Facebook, and even LinkedIn, Twitter was starting to look like the runt of the Internet litter. Twitter was still unprofitable as its ad business struggled mightily against its larger competitors. Dorsey would also return as CEO of the company, while still maintaining the top job at his other company, Square (now Block).
2016
Rumors began circulating that Twitter was looking to be acquired, with Salesforce as a potential suitor. Meanwhile, Twitter and Facebook were criticized for their role in letting prominent users like Donald Trump, who would win the U.S. presidential election that year, spread misleading information without consequence.
“Having the president-elect on our service using it as a direct line of communication allows everyone to see what is on his mind in the moment,” Dorsey said at the time. “We’re definitely entering a new world where everything is on the surface and we can all see that in real time and we can have conversations about it.”
2017
For a moment, Twitter appeared to be on the upswing. Its stock was finally trending upward as the company’s finances were improving. Meanwhile, Trump as president continued to use Twitter as his megaphone. According to Twitter’s own data, “Trump was the most-tweeted-about global leader in the world and in the United States” that year, CNBC reported.
2018
Dorsey and Facebook’s then-operating chief Sheryl Sandberg testified before the Senate Intelligence Committee about alleged interference by Russia-linked actors in the 2016 election. Trump and fellow Republicans became increasingly vocal about alleged political bias by Twitter and other social media sites.
“In fact, from a simple business perspective and to serve the public conversation, Twitter is incentivized to keep all voices on the platform,” Dorsey said at the time.
2019
Analysts found correlations between President Trump’s voracious use of Twitter and various markets, including gold, underscoring the cultural power of Twitter. Trump met with Dorsey — a Twitter spokesperson said “Jack had a constructive meeting with the President of the United States today at the president’s invitation.”
“They discussed Twitter’s commitment to protecting the health of the public conversation ahead of the 2020 U.S. elections and efforts underway to respond to the opioid crisis,” the spokesperson said.
2020
As Covid-19 spread across the globe, the spread of misinformation dominated the online conversation. And Twitter continued to struggle to grow its business. The service was also hacked that year, and miscreants gained access to over a dozen high-profile accounts, including those controlled by Joe Biden, Jeff Bezos, and Musk
2021
Twitter permanently banned Trump over inflammatory comments the president made during the U.S. Capitol riots in January that the company said could lead to “further incitement of violence.” Trump would allege that Twitter workers “coordinated with the Democrats and the Radical Left in removing my account from their platform, to silence me.” Later, Dorsey suddenly stepped down as CEO and was replaced by Parag Agrawal, the company’s chief technology officer.
2022
Musk took over Twitter after a protracted legal spat that would have culminated this week in a trial in Delaware’s Court of Chancery. The Tesla CEO agreed in April to pay $44 billion for Twitter, but then attempted to renege on the deal. He changed course and opted to proceed, walking into the company’s San Francisco office on Wednesday with what appeared to be a porcelain bathroom sink in his hands.
“Entering Twitter HQ – let that sink in!” he tweeted, with a video of his entrance.
Musk immediately began making changes, firing Agrawal, finance head Ned Segal, and head of legal policy Vijaya Gadde.
WATCH: Billionaire Elon Musk steps into Twitter HQ, sink in hand
The Hims app arranged on a smartphone in New York on Feb. 12, 2025.
Gabby Jones | Bloomberg | Getty Images
Hims & Hers Health shares closed up 5% on Tuesday after the company announced patients can access Eli Lilly‘s weight loss medication Zepbound and diabetes drug Mounjaro, as well as the generic injection liraglutide, through its platform.
Zepbound, Mounjaro and liraglutide are part of the class of weight loss medications called GLP-1s, which have exploded in popularity in recent years. Hims & Hers launched a weight loss program in late 2023, but its GLP-1 offerings have evolved as the company has contended with a volatile supply and regulatory environment.
Lilly’s weekly injections Zepbound and Mounjaro will cost patients $1,899 a month, according to the Hims & Hers website. The generic liraglutide will cost $299 a month, but it requires a daily injection and can be less effective than other GLP-1 medications.
“As we look ahead, we plan to continue to expand our weight loss offering to deliver an even more holistic, personalized experience,” Dr. Craig Primack, senior vice president of weight loss at Hims & Hers, wrote in a blog post.
A Lilly spokesperson said in a statement that the company has “no affiliation” with Hims & Hers and noted that Zepbound is available at lower costs for people who are insured for the product or for those who buy directly from the company.
In May, Hims & Hers started prescribing compounded semaglutide, the active ingredient in Novo Nordisk‘s GLP-1 weight loss medications Ozempic and Wegovy. The offering was immensely popular and helped generate more than $225 million in revenue for the company in 2024.
But compounded drugs can traditionally only be mass produced when the branded medications treatments are in shortage. The U.S. Food and Drug Administration announced in February that the shortage of semaglutide injections products had been resolved.
That meant Hims & Hers had to largely stop offering the compounded medications, though some consumers may still be able to access personalized doses if it’s clinically applicable.
During the company’s quarterly call with investors in February, Hims & Hers said its weight loss offerings will primarily consist of its oral medications and liraglutide. The company said it expects its weight loss offerings to generate at least $725 million in annual revenue, excluding contributions from compounded semaglutide.
But the company is still lobbying for compounded medications. A pop up on Hims & Hers’ website, which was viewed by CNBC, encourages users to “use your voice” and urge Congress and the FDA to preserve access to compounded treatments.
With Tuesday’s rally, Hims and Hers shares are up about 27% in 2025 after soaring 172% last year.
WATCH: Hims & Hers shares tumble over concerns around weight-loss business
Meta CEO Mark Zuckerberg holds a smartphone as he makes a keynote speech at the Meta Connect annual event at the company’s headquarters in Menlo Park, California, on Sept. 25, 2024.
Manuel Orbegozo | Reuters
Meta’s head of artificial intelligence research announced Tuesday that she will be leaving the company.
Joelle Pineau, the company’s vice president of AI research, announced her departure in a LinkedIn post, saying her last day at the social media company will be May 30.
Her departure comes at a challenging time for Meta. CEO Mark Zuckerberg has made AI a top priority, investing billions of dollars in an effort to become the market leader ahead of rivals like OpenAI and Google.
Zuckerberg has said that it is his goal for Meta to build an AI assistant with more than 1 billion users and artificial general intelligence, which is a term used to describe computers that can think and take actions comparable to humans.
“As the world undergoes significant change, as the race for AI accelerates, and as Meta prepares for its next chapter, it is time to create space for others to pursue the work,” Pineau wrote. “I will be cheering from the sidelines, knowing that you have all the ingredients needed to build the best AI systems in the world, and to responsibly bring them into the lives of billions of people.”
Vice President of AI Research and Head of FAIR at Meta Joelle Pineau attends a technology demonstration at the META research laboratory in Paris on February 7, 2025.
Stephane De Sakutin | AFP | Getty Images
Pineau was one of Meta’s top AI researchers and led the company’s fundamental AI research unit, or FAIR, since 2023. There, she oversaw the company’s cutting-edge computer science-related studies, some of which are eventually incorporated into the company’s core apps.
She joined the company in 2017 to lead Meta’s Montreal AI research lab. Pineau is also a computer science professor at McGill University, where she is a co-director of its reasoning and learning lab.
Some of the projects Pineau helped oversee include Meta’s open-source Llama family of AI models and other technologies like the PyTorch software for AI developers.
Pineau’s departure announcement comes a few weeks ahead of Meta’s LlamaCon AI conference on April 29. There, the company is expected to detail its latest version of Llama. Meta Chief Product Officer Chris Cox, to whom Pineau reported to, said in March that Llama 4 will help power AI agents, the latest craze in generative AI. The company is also expected to announce a standalone app for its Meta AI chatbot, CNBC reported in February.
“We thank Joelle for her leadership of FAIR,” a Meta spokesperson said in a statement. “She’s been an important voice for Open Source and helped push breakthroughs to advance our products and the science behind them.”
Pineau did not reveal her next role but said she “will be taking some time to observe and to reflect, before jumping into a new adventure.”
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