Splinter’s editor in chief, Aleksander Chan, confirmed the shutdown on Twitter.

Mr. Maidment said that G/O Media did not plan to reduce its network’s overall editorial work force.

But Hamilton Nolan, a senior writer for the site, told The Times that all the employees had been laid off. He said they received an email on Wednesday night summoning them to a Thursday morning meeting, where they were told about the decision.

“There was no formal warning,” he said.

Gizmodo Media Group Union put out a statement on Twitter saying that Splinter’s staff members were working with the Writers Guild of America East to negotiate severance payments.

“Splinter did the kind of fearless and adversarial journalism that represents the very best of our sites,” the union’s statement said. “This loss hurts, and we’re worse off for it — particularly in the lead-up to one of the most consequential elections of our lifetime.”

Splinter was introduced in 2017 as a rebranding of the news site Fusion, which was owned by Univision’s Fusion Media Group. It was part of a bundle of sites that were sold off after the demise of Gawker.