Apple chief executive Tim Cook tweeted Sunday morning that he stands by the 250 Apple employees who have DACA status.

The message was the first time that Apple publicly disclosed how many employees with DACA status work at the technology behemoth.

Cook’s remarks come as he and hundreds of business executives from Google, Facebook, Microsoft, Amazon and many other technology companies are calling upon President Trump to preserve an Obama-era program that allows immigrants brought to the United States illegally as children to live and work without punishment.

The national coalition on Thursday petitioned Trump in an open letter to rethink his plans to scrap the 5-year-old Deferred Action for Childhood Arrivals (DACA) program. The White House said Trump will announce his decision Tuesday on whether to terminate the program.

For Cook and the other business leaders, ending the DACA protections would imperil the economy and jeopardize the futures of nearly 800,000 young people, known as “dreamers” — 97 percent of whom are in school or in the workforce, they wrote.

“Dreamers are vital to the future of our companies and our economy,” the executives wrote. “With them, we grow and create jobs. They are part of why we will continue to have a global competitive advantage.”

The letter was organized by Facebook chief executive Mark Zuckerberg’s FWD.us and was signed by leaders of nearly 400 other companies.