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Linda Yaccarino, the boss of Elon Musk’s social media site X, has announced she is stepping down.

Ms Yaccarino has been in the role since June, 2023.

In a post on the platform, she said was “immensely grateful” to Musk for “entrusting me with the responsibility of protecting free speech, turning the company around, and transforming X into the Everything App”.

Musk has posted a brief reply, saying only: “Thank you for your contributions.”

The BBC has approached X for comment.

Ms Yaccarino was previously head of advertising at NBCUniversal, where she was credited with helping to steer it through the upheaval caused by technology firms.

She joined X, then Twitter, at a time of tumult with advertisers quitting the site and Musk having overseen the firing of a huge number of staff.

In her departure post, she said that she had decided to step down after “two incredible years”.

She added: “When Elon Musk and I first spoke of his vision for X, I knew it would be the opportunity of a lifetime to carry out the extraordinary mission of this company.”

It is not clear whether there has been any break down in their relationship since she joined in 2023.

But the platform’s tone has changed in that time.

Its former incarnation Twitter was accused of leaning left, now X leans unashamedly to the right in terms of the content that gets the most visibility.

Though Musk stepped down as CEO he never truly stepped back from his favourite social network, and has if anything grown louder and more controversial since he appointed her.

People who have worked directly with Musk have described him as both a visionary and a workaholic, who others can only keep up with for so long.

Whatever the cause, her exit comes at a difficult time for Musk, who is dealing with falling sales at his car maker Tesla.

He is also embroiled in a war of words with his former political ally, US President Donald Trump, culminating in Musk planning a new political party.

X has also continued to attract controversy.

The most recent of these has seen Musk’s chatbot, Grok – which is embedded in X – speak favourably about Hitler.

In a statement, xAI said it was working to remove what it called “inappropriate” posts.

Christian Horner has been sacked as CEO and team principal of Red Bull Racing, the team announced Wednesday.

“We would like to thank Christian Horner for his exceptional work over the last 20 years,” Oliver Mintzlaff, Red Bull CEO of corporate projects and investments, said in a news release. “With his tireless commitment, experience, expertise and innovative thinking, he has been instrumental in establishing Red Bull Racing as one of the most successful and attractive teams in Formula 1. Thank you for everything, Christian, and you will forever remain an important part of our team history.”

The bombshell move comes at a tumultuous time for the Formula One team as it struggles to create a competitive car, sitting fourth in the constructors’ standings largely thanks to Max Verstappen’s performances this season.

“Red Bull has released Christian Horner from his operational duties with effect from today (Wednesday, 9 July 2025) and has appointed Laurent Mekies as CEO of Red Bull Racing,” a spokesperson from Red Bull said in the release.

From my first race win, to four world championships, we have shared incredible successes. Winning memorable races and breaking countless records. Thank you for everything, Christian! pic.twitter.com/au4XjMqhlH

— Max Verstappen (@Max33Verstappen) July 9, 2025

Mekies, who was the team principal of Racing Bulls, will immediately replace Horner as CEO, with racing director Alan Permane taking over as the team boss at the sister team.

“The last year and a half has been an absolute privilege to lead the team with Peter (Bayer, CEO of Racing Bulls). It has been an amazing adventure to contribute to the birth of Racing Bulls together with all our talented people,” Mekies said in a statement.

“The spirit of the whole team is incredible, and I strongly believe that this is just the beginning. Alan is the perfect man to take over now and continue our path. He knows the team inside out and has always been an important pillar of our early successes.”

Horner has led Red Bull since it joined the grid in 2005 and oversaw its successful eras, including Sebastian Vettel’s run of world championships in the 2010s and Verstappen’s four titles since 2021.

Under his leadership, the team secured 124 victories, 107 pole positions, 287 podium finishes, eight drivers’ world championships and six constructors’ titles (the last one being the dominant 2023 season). But this year, McLaren has dominated and neither the team nor Verstappen appear likely to battle for a title.

Horner already denied reports earlier this season about Ferrari reaching out to him to replace current team principal Fred Vasseur.

“It’s always flattering to be associated with other teams. But my commitment, 100 percent, is with Red Bull,” he said during the Spanish GP weekend, when asked about the matter. “It always has been and certainly will be for the long term.

“There’s a bunch of speculation — always in this business — people coming here, going there, whatever. I think people in the team know exactly what the situation is.”

The news comes at a time when rumors are also swirling about Verstappen’s racing future.

In recent weeks, the topic about whether the Dutchman would leave Red Bull for Mercedes before the end of his contract in 2028 has continued to arise. During the British Grand Prix weekend, George Russell, who is out of a contract at the end of this season, said: “The likelihood I’m not at Mercedes next year, I think, is exceptionally low.”

The last 18 months at Red Bull have been turbulent. Multiple senior figures have left the team in that span, such as Jonathan Wheatley to become Sauber’s team principal and Adrian Newey to Aston Martin. There’s been a downturn in performance as the team struggles with its car, so much so that Verstappen has wrestled with it — and been vocal about the issues. He’s only won two races this season, and then there’s the case of the underperforming second Red Bull seat, which has already seen one driver swap this year (from Liam Lawson to Yuki Tsunoda).

Newey and Horner were at Red Bull together for 19 years (Jim Watson/AFP via Getty Images)

Red Bull GmbH, the F1 team’s parent company, confirmed in early February 2024 that an independent investigation into allegations of controlling and inappropriate behavior against Horner by a female employee had been launched and “an external specialist barrister” would handle the matter.

Horner was questioned by a King’s Counsel (KC) on Feb. 9, and the season launch took place several days later. On Feb. 28, Red Bull GmbH announced the investigation was completed, and the grievance was dismissed.

In early March 2024, the employee was suspended, and this was related to the findings from the independent investigation, a person briefed on the matter told The Athletic. That same month, she filed an appeal.

Last August, Red Bull confirmed that the employee’s appeal was “not upheld.” Horner has denied the allegations.

The shock dismissal

Analysis by Madeline Coleman

There’s been a lot of smoke surrounding Red Bull this season, though it looked as if Verstappen was the one in question rather than Horner. Despite what had transpired over the last two years, on and off track, the 51-year-old had support from Thai majority shareholder Thai Chalerm Yoovidhya.

The news of Horner’s dismissal comes as a shock considering F1 is only halfway through the season, but Red Bull’s performance has been poor this year, as it struggles to address the issues with the car. Horner’s last race was at the British Grand Prix, where Verstappen secured pole position after key set-up changes to make the car lower in downforce. But the Dutchman struggled in the wet conditions and finished fifth, 56.781 seconds off winner Lando Norris.

The speculation and scrutiny around the drivers’ situation also does not help matters. Beyond Verstappen’s situation and ongoing questions from the media around his future, he is the only driver performing. Liam Lawson and Yuki Tsunoda struggled with the car, and the Japanese driver finished last (among those who didn’t DNF or DNS) for the second consecutive race weekend.

“The tire is just melting lap by lap, corner by corner,” Tsunoda said after the Austrian GP. “Whatever I do, it’s melting every lap, and I’m feeling less grip lap by lap. In that situation, it’s really hard to maintain the pace.”

(Top photo: Erwin Scheriau/APA/AFP via Getty Images)