With the Omicron COVID variant rapidly spreading in the U.S. and abroad, companies are on red alert when it comes to deciding what to do about their return-to-office plans. And while some employees might be itching to come back to headquarters, it’s unclear whether they’ll be able to do that anytime soon.

Apple

On December 16, Apple CEO Tim Cook sent out a memo to company employees sharing that the rise in COVID-19 cases and concerns around the new Omicron variant will push the initially planned Feb. 1 return-to-office date to “a date yet to be determined.” This is the latest of many delays in Apple’s return-to-office plans, which were originally scheduled for June of 2020. Cook also said in the memo that every employee, including retail workers, would receive a $1,000 bonus to be used for work-from-home needs.

Apple did not immediately respond to Fortune’s request for comment.

Nike

A leaked email published by Insider on December 16 showed Nike planned to push forward with its return-to-office schedule, mandating employees to come in three days a week beginning on Jan. 10. In the email, the company referred to January as an “on-ramp period…to ease back into a new normal.” Nike has not publicly announced its return-to-office plans, although it did delay a September return after a surge in cases of the Delta variant.

Nike did not immediately respond to Fortune’s request for comment.

Goldman Sachs

It looks like the global investment bank is preparing for the consequences of the Omicron variant, as it told its London staff on December 13 to work from home if they are able. The U.K. has been hit especially hard by the new variant, with around 200,000 new infections a day. Goldman Sachs brought most of its U.S. workers back to the office this summer, and has not recently announced any plans to change that due to the Omicron variant. Since October, CEO David Solomon has publicly been eager for a full return to office.

Goldman Sachs did not immediately respond to Fortune’s request for comment.

Morgan Stanley

On December 13, CEO James Gorman told CNBC he “was wrong” to believe that the pandemic wouldn’t last past Labor Day of this year. Now he believes COVID-19 will still be a concern for 2022 given the new variants.

"Everybody’s still finding their way and then you get the Omicron variant; who knows, we’ll have Pi, we’ll have Theta and Epsilon, and we’ll eventually run out of letters of the alphabet. It’s continuing to be an issue,” Gorman told CNBC.

He previously told employees over the summer that he’d be “very disappointed” if he didn’t see more staff returning to in-person work by September. Currently, more than half of Morgan Stanley employees are working at the headquarters in New York, although they have the option to work from home.

There is “no fixed date when employees are required to return to the workplace,” a spokesperson for Morgan Stanley told Fortune. The company is not planning to send home employees who are currently working in the office.

Lyft

With an original return-to-office date set in February of this year, the rideshare app company said last week that it will allow all employees to work from home throughout the entirety of 2022. Offices will fully reopen in February of next year for employees who want to come in, but being in-person will be optional for the whole year. The decision wasn’t “directly or exclusively tied” to the Omicron variant, but it was “a factor contributing to some uncertainty,” a Lyft spokesperson told Bloomberg.

A spokesperson for Lyft told Fortune that when it came to the decision to delay in-person returns, the “primary driver was to provide team members with the flexibility they'd been asking for for a number of reasons, including many that aren't related to the pandemic.”

Citi

With COVID cases spiking in the New York City metropolitan area, Citigroup advised its employees in New York and New Jersey to start working from home again through the holidays. The decision was made with the intent to protect employees’ holidays plans and reduce the number of people coming into the offices in New York City and Jersey City. Since September, Citi's New York City employees have been required to come into the office at least two times a week, although the company says it is unclear whether that mandate will stay in effect after the holiday. The bank’s CEO, Jane Fraser, has been a vocal proponent of the hybrid work model, promising staffers in March that they would be able to permanently work from home at least two days a week.

A spokesperson told Fortune that Citi will "continue closely monitoring the data" in determining next steps.

Google

Google has pushed back its plans for in-person work, postponing the Jan. 10 return date earlier this month for workers worldwide. The Omicron variant and new travel restrictions have “triggered global uncertainty,” Google’s president for Europe, the Middle East, and Africa, Matt Brittin, reportedly told employees in an email. So far, the tech giant has not announced a new return-to-office date.

Google did not immediately respond to Fortune’s request for comment.

Ford

The motor company’s plans to return to office by January have been pushed back to March, although there are still plans to bring back a limited number of employees in February to test a “flexible hybrid” system.

Ford did not immediately respond to Fortune’s request for comment.