LOS ANGELES — Both Pixar and zombies fell short in displacing “How to Train Your Dragon” from the top position at North American box offices this weekend. The live-action remake by Universal Pictures held its ground as the premier film, grossing $37 million in ticket sales during its second weekend, despite the significant releases of “Elio” and “28 Years Later,” based on studio estimates released Sunday. “How To Train Your Dragon” has swiftly garnered $358.2 million globally.

Under the direction of Dean DeBlois, “How To Train Your Dragon” has revitalized the DreamWorks Animation series, six years after its prior installment. Plans are underway for a sequel to the $150 million production, which reimagines the 2010 animated story of a Viking boy and his dragon companion.

Pixar’s “Elio” encountered a challenging debut. The Walt Disney Co. animation studio historically released some of its major hits in June, such as “Cars,” “WALL-E,” and “Toy Story 4.” However, “Elio,” a sci-fi adventure about a boy aspiring to encounter aliens, managed a modest $21 million, marking Pixar’s lowest opening to date.

“This is a weak opening for a new Pixar movie,” said David A. Gross, who runs the movie consulting firm FranchiseRe. “These would be solid numbers for another original animation film, but this is Pixar, and by Pixar’s remarkable standard, the opening is well below average.”

“Elio,” originally set for release in early 2024, had a bumpy road to the screen. Adrian Molina — co-director of “Coco” — was replaced mid-production by Domee Shi (“Turning Red”) and Madeline Sharafian. Back at Disney’s D23 conference in 2022, America Ferrera appeared to announce her role as Elio’s mother, but the character doesn’t even exist in the revamped film.

Disney and Pixar spent at least $150 million making “Elio,” which didn’t fare any better internationally than it did in North America, bringing in just $14 million from 43 territories. Pixar stumbled coming out of the pandemic before stabilizing performance with 2023’s “Elemental” ($496.4 million worldwide) and 2024’s “Inside Out 2” ($1.7 billion), which was the company’s biggest box office hit.

“Elemental” was Pixar’s previously lowest earning film, launching with $29.6 million. It rallied in later weeks to collect nearly half a billion dollars at the box office. The company’s first movie, “Toy Story,” opened with $29.1 million in 1995, or $60 when adjusted for inflation. It remains to be seen whether “Elio’s” decent reviews and “A” from CinemaScore audiences can lead it to repeat “Elemental’s” trajectory.

With most schools on summer break, the competition for family audiences was stiff. Disney’s own “Lilo & Stitch,” another live-action remake, continued to pull in young moviegoers. It grossed $9.7 million in its fifth weekend, bringing its global tally to $910.3 million. .

“28 Years Later” signaled the return of another, far gorier franchise. Director Danny Boyle reunited with screenwriter Alex Garland to resume their pandemic apocalypse thriller 25 years after “28 Days Later” and 18 years after its sequel, “28 Weeks Later.”

The Sony Pictures release opened with $30 million. That was good enough to give Boyle, the filmmaker of “Slumdog Millionaire” and “Trainspotting,” the biggest opening weekend of his career. The film, which cost $60 million to make, jumps ahead nearly three decades from the outbreak of the so-called rage virus for a coming-of-age story about a 12-year-old (Alfie Williams) venturing out of his family’s protected village. Aaron Taylor-Johnson, Jodie Comer and Ralph Fiennes co-star.

Reviews have been good (90% fresh on Rotten Tomatoes) for “28 Years Later,” though audience reaction (a “B” CinemaScore) is mixed. Boyle has more plans for the zombie franchise, which will next see the release of “28 Years Later: The Bone Temple” next year from director Nia DaCosta.

“28 Years Later” added another $30 million in 59 overseas markets.

After its strong start last weekend with $12 million, A24’s “Materialists” held well with $5.8 million in its second weekend. The romantic drama by writer-director Celine Song and starring Dakota Johnson, Pedro Pascal and Chris Evans has collected $24 million so far.

Next weekend should also be a competitive one in movie theaters, with both “F1,” from Apple and Warner Bros., and Universal’s “Megan 2.0” launching in cinemas.

With final domestic figures being released Monday, this list factors in the estimated ticket sales for Friday through Sunday at U.S. and Canadian theaters, according to Comscore:

1. “How to Train Your Dragon,” $37 million.
2. “28 Years Later,” $30 million.
3. “Elio,” $21 million.
4. “Lilo & Stitch,” $9.7 million.
5. “Mission: Impossible — The Final Reckoning,” $6.6 million.
6. “Materialists,” $5.8 million.
7. “Ballerina,” $4.5 million.
8. “Karate Kid: Legends,” $2.4 million.
9. “Final Destination: Bloodlines,” $1.9 million.
10. “Kuberaa,” $1.7 million.