Mountainhead is a 2025 American satirical comedy-drama television film written and directed by Jesse Armstrong in his directorial debut, and starring Steve Carell, Jason Schwartzman, Cory Michael Smith, and Ramy Youssef.
The film follows four billionaire friends on a secluded weekend retreat as the world goes through major turmoil.
The retreat takes place at Souper's new remote Utah mountain home, dubbed "Mountainhead" (in reference to Ayn Rand's novel The Fountainhead). Though the gathering is ostensibly an opportunity for the four men to reconnect as friends (dubbed the "Brewsters") without the interference of their usual business concerns, all four have their own ulterior motives. Ven, having fast-tracked new features to Traam that enabled the disinformation to spread, wishes to acquire Bilter for its fact-checking technology to avoid rescinding the new features and taking accountability. Randall wishes to see Traam continue to grow and progress, believing Ven's ventures could lead to a transhumanist solution for his illness. Jeff sees his net worth skyrocket as the turmoil worsens due to Bilter's fact-checking abilities, and does not want his company subsumed into Traam. Souper, feeling inferior for never having made a billion dollars, wishes to petition the others to invest in Slowzo, his "lifestyle super-app".
The group tries to settle into the gathering, but soon after arriving Jeff and Ven begin arguing over Traam's effects, before the rest of them try to pressure Jeff into selling Bilter. They later snowmobile to and walk up a nearby mountain range, before conducting a Brewster ritual where they write their net worth on their chests in lipstick (ranked Ven, Randall, Jeff, and Souper). When they return, they realize the worldwide chaos caused by Traam has become worse and governments are beginning to falter, and the four get increasingly combative and exasperated. After Bilter's stock surges again, Jeff's net worth outranks Randall's, and Randall flips out on Jeff for making a big deal out of swapping Brewster hats.
After Ven has a call with the President where he rebuffs attempts to either roll back or limit Traam's features, Ven, Randall, and Souper decide to use their influence to accelerate the chaos in an attempt to bring about a global Technocracy dictatorship. Jeff privately approaches Randall, who is one of Traam's biggest investors, with a proposal to wrest control of the company from Ven and cooperate with the US government's desires to install security measures. Randall, believing Jeff's plan will ruin his hope of surviving cancer, discloses the scheme to Ven and Souper, and the three of them conceive a tenuous plot to kill Jeff and take control of Bilter.
After two bungled attempts on his life by the other three, Jeff leads them on a chase through the house, eventually hiding out in the sauna. He is found and barricaded in by the others, who prepare to immolate him with gasoline. In desperation, Jeff hastily drafts the terms of an agreement to sign Bilter over to Traam, with the others agreeing to release him after working out the details.
The next morning, Jeff is released after the contract is signed and awkwardly confronts his unapologetic friends at breakfast. The three also admit that they have lost interest in their plan to launch coups against multiple governments. As he prepares to leave Mountainhead, Jeff has a private conversation with Ven telling him he will try to fight the deal.
Ven then asks him to do the deal legitimately, to which Jeff agrees on the condition that Randall be excluded. Jeff tells Ven that he believes Traam will fail even with Bilter's help, while Ven professes faith in his company. Jeff tells Ven if he does become part of Ven's company, he will eventually try to force Ven out, to which Ven replies, that is what makes it exciting.
Randall witnesses the end of this exchange from afar, and rides away from Mountainhead looking dejected. The film comes to a close with Souper, having finally achieved billionaire status through the deal with Jeff, overlooking the scenery of the mountains surrounding his home while following a meditation exercise on Slowzo.
The film took under 6 months to produce, with production designer Stephen Carter being approached in December 2024 before a script, location, or cast had been decided. Armstrong began writing the script in January 2025, with the movie being fast-tracked for development by HBO. A number of locales were considered, including the tropics or a private island, before a " Shining-esque mansion" in the snow was decided on. After scouting for a suitable location in areas like British Columbia, Wyoming, and Colorado, principal photography took place in Park City, Utah in March 2025. It is set almost entirely in a single location, a 21,000 ft2 seven bedroom mansion that was between owners at the time of filming. Filming took around five weeks, with other locations like the private jet scenes being shot on green screen sets.
On June 4, 2025, it was reported that the film is the most-watched HBO Original film since Bad Education, drawing 1.3 million viewers across linear and streaming platforms to date.
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