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‘Obsession’ Just Joined the Elite Top 5 Highest-Grossing Horror Movies

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Blumhouse has built its entire reputation on turning shoestring budgets into massive theatrical paydays, but even by the studio’s own standards, ‘Obsession‘ has become something genuinely extraordinary. What started as a modest horror release has quietly transformed into one of the most improbable box office success stories of the entire decade.

The film’s path to theaters was unconventional from the start. Written and directed by YouTube filmmaker Curry Barker, one half of the sketch comedy duo That’s a Bad Idea, ‘Obsession’ premiered at the Toronto International Film Festival’s Midnight Madness section in September 2025, where Focus Features and Blumhouse acquired it for roughly $15 million after beating out competing bids from A24 and Neon. That price tag made it the highest amount ever commanded by a genre film at the festival.

That early confidence has paid off in a massive way. ‘Obsession’ is now sitting at roughly $514 million at the worldwide box office, placing it firmly among the top five highest-grossing horror movies of all time. That ranking puts it just behind ‘It’ at $720 million, ‘The Sixth Sense’ at $673 million, and ‘I Am Legend’ at $586 million, while pushing past ‘World War Z’s’ $540 million total.

The film also became the first original movie released in the 2020s to cross the $500 million mark worldwide, surpassing Pixar’s ‘Elemental’ as the highest-grossing original release of the entire post-pandemic era, a genuinely rare feat given how heavily modern box office success typically depends on established franchises rather than brand-new stories.

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What makes the climb even more remarkable is the film’s production budget of just $750,000, a figure that turns its box office haul into one of the most extreme cost-to-gross ratios in cinema history. ‘Obsession’ opened in North American theaters on May 15 with a stronger-than-expected $17.1 million from over 3,000 theaters, quickly becoming Focus Features’ highest-grossing release.

The film’s momentum only built from there rather than fading in typical fashion. It actually grew over its Memorial Day weekend frame with a $23.9 million three-day gross, a 39.4% increase over its opening numbers, an almost unheard-of trajectory for a wide theatrical release. It also became the cheapest film to top the domestic box office since 2009’s ‘Paranormal Activity,’ a comparison that speaks directly to the kind of low-budget horror lineage ‘Obsession’ now belongs to.

The film follows a hopeless romantic whose wish to earn his crush’s affection spirals into a sinister, increasingly disturbing nightmare once the object of his obsession becomes irrationally fixated on him in return. Its success has already reshaped plans for Barker’s career, with the filmmaker now attached to write, direct, and produce a new take on ‘The Texas Chainsaw Massacre’ for A24, alongside a follow-up horror-comedy titled ‘Anything But Ghosts’ that has already wrapped filming with Focus and Blumhouse once again attached.

For a genre that has always prided itself on delivering outsized returns relative to modest production costs, ‘Obsession’ has become something close to a new benchmark, proof that a viral internet sensibility and a shoestring budget can still translate into one of the biggest theatrical horror stories in years. With its total still climbing, there’s a real chance ‘Obsession’ keeps pushing further up the all-time chart before its run is finally finished.

How High Do You Think Obsession Can Climb at the Box Office?

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