The announcement could launch a new chapter for the troubled company, which has laid off roughly three quarters of its workers and has struggled in recent weeks with major changes to the platform and frequent outages. Adding to the pressure, Musk already runs several other companies, including Tesla, where investors have grown discontented with his distractions at Twitter.

Yaccarino in particular could serve to calm advertiser fears while balancing Musk’s demand for sweeping changes to Twitter’s policies on content moderation.

Musk provided little information about his pick but said the new CEO, a woman, would start in several weeks and that he would stay on as executive chairman and chief technology officer, running products, software and system operations — also prompting questions about whether his involvement there will significantly change.

“Excited to announce that I’ve hired a new CEO for X/Twitter,” Musk wrote in the tweet. “She will be starting in ~6 weeks!”

Musk and Twitter did not immediately respond to a request for comment.

The Wall Street Journal and other outlets earlier Thursday reported that Yaccarino was in talks to take the job. Musk joined Yaccarino for an onstage interview at a marketing conference in Miami Beach, last month. The keynote event was called: “Twitter 2.0: From Conversations to Partnerships.”

NBC Universal spokesman Joe Benarroch said Yaccarino was unavailable for comment on Thursday. “Linda is in back-to-back rehearsals for Monday’s upfront,” he said, referring to an advertising presentation.

By Thursday afternoon, investors, former employees and even some of those in Musk’s orbit were still in the dark about Musk’s pick. Questions swirled around whether he would appoint a tech insider with a focus on engineering, the moonshot bet on artificial intelligence or a more traditional business leader who could serve as the public face of the company, winning back the trust of advertisers and confidence of users.

Musk also has a track record of making splashy announcements and big promises — and then failing to follow through.

Musk has faced criticism for his leadership of Twitter, which has ushered in sweeping job and budget cuts, transformative changes and erratic and unpredictable decision-making that has left advertisers fleeing. In an email to staff earlier this year, Musk valued the company at $20 billion, less than half the $44 billion he paid to obtain it.

Musk bought Twitter last year on a promise to restore his vision of “free speech,” bringing back banned users such as former president Donald Trump and his favorite satire site the Babylon Bee. He leaned heavily into a subscription model aimed at generating revenue and eradicating what he decried as a “lords & peasants system” for verifying users with Twitter’s signature blue badges.

But Musk’s actions have also spooked advertisers and prompted backlash from users, including some in his corner. Soon after taking over Twitter, Musk tweeted a conspiracy theory about the attack on the husband of then-House Speaker Nancy Pelosi (D), Paul Pelosi. And Musk’s changes to verification — awarding a blue check to users who paid $8 — resulted in a flood of impersonation attempts that eroded confidence in the site. After a fake account posing as pharmaceutical company Eli Lilly falsely announced insulin was free, Twitter likely lost millions as advertisers pulled back.

Last year, after making a controversial decision to limit users’ ability to promote outside social media websites — prompting massive backlash — Musk agreed to step down as Twitter CEO upon finding a person “foolish enough to take the job.”

In a December unscientific poll, Musk asked, “Should I step down as head of Twitter?”

“I will abide by the results of this poll,” he continued.

The poll amassed more than 17 million votes, with 57.5 percent of respondents calling for him to step aside.

In an interview with the BBC last month, Musk said he had fulfilled that pledge by appointing his dog Floki to the role.

“I said I would appoint a new CEO, and I did, and it’s my dog,” he said.

Earlier this year, Musk said he would probably need until the end of this year to find his replacement.

Tesla’s stock rose in after-hours trading following the news. Investors have hoped Musk would return to prioritizing Tesla, the electric car company where he also serves as CEO, and the key to his fortune.

Musk’s dueling roles have resulted in a frenetic schedule that leaves him bouncing from Austin, where he lives, to San Francisco, where Twitter is based — and where he has admitted to sleeping on a seventh floor couch. Tesla’s main factory is also in the Bay Area, in addition to its engineering headquarters. SpaceX, the rocket company Musk leads, has a major presence on Texas’ Gulf Coast, but is based in Southern California.

As a result, Musk spends significant time visiting the various locations from his private jet. Recently, after taking over Twitter, Musk has also been jetting to locations such as New York City and Washington, D.C., to meet with advertisers and government officials.

Even amid the criticism that he was stretched thin, Musk recently added a sixth company to his empire, X.AI, a firm that will focus on generative artificial intelligence, the field behind large-language model chatbots such as ChatGPT.