Mark Zuckerberg sold $21 million worth of Meta stock amid the buzz surrounding the AI agent Muse

Meta CEO Mark Zuckerberg sold his shares for the first time in a year, netting more than $21 million, according to Barron's. In total, company insiders sold $50 million worth of shares. This coincided with a sharp rise in the stock price following the launch of the AI assistant Muse, which quickly gained popularity. Thanks to the rally, September became Meta’s best month since 2022—its market value increased by 27%.

On September 24, Zuckerberg sold a total of 27,474 Meta shares worth more than $21.3 million, according to documents filed with the U.S. Securities and Exchange Commission. According to the documents, this was the first reduction in the billionaire’s stake in the company since August 2025.

The transactions were carried out through two entities he controls and were conducted as part of a pre-approved trading plan that Zuckerberg adopted on January 31. Under the terms in effect through November 1, the CEO of Meta may sell 639,347 Class A shares and 1,268,340 Class B shares.

Christopher Cox, the company’s chief product officer, carried out an even larger transaction: On September 21, he sold 40,000 shares for $28.5 million. And on September 21 and 28, Chief Operating Officer Javier Oliván sold 1,575 shares on each occasion, for a total of approximately $2.3 million.

Sales of Meta executives’ shares coincided with a sharp rise in the stock price following the September 8 launch of Muse, an AI assistant capable of performing everyday tasks on behalf of the user. It was well received by both Wall Street analysts and ordinary users: just two weeks after its release, Muse rose to the top spot among free apps in U.S. iOS app stores, surpassing OpenAI’s ChatGPT.

As a result, September was the best month for Meta shares since 2022 and the fifth-best in terms of gains in recorded history, according to CNBC. The company’s stock price jumped 27%, while the Nasdaq Composite technology index gained about 2% over the same period.

At last week’s Meta Connect developer conference, Zuckerberg called Muse a “central element” of the company’s product and business strategy and unveiled new devices, including the AI-powered Muse Charm. And at the end of the month, the tech giant appointed MongoDB CEO C.J. Desai to lead the new Meta Enterprise Platform division and expanded the capabilities of its AI assistant specifically for small businesses.

"The market for enterprise AI solutions, including cloud computing power, is expected to exceed $1 trillion by 2028, and we believe that Meta’s consumer data and its communication apps could give the company an edge when working with consumer-focused clients,” wrote analysts at BofA Global Research. — “We believe that Meta’s model APIs will be available on the platforms of leading hyperscalers.”

This article was AI-translated and verified by a human editor