By Dave Sebastian

Zoom Video Communications Inc. plans to raise $1.5 billion through what would be its largest stock offering since its trading debut in 2019.

The San Jose, Calif.-based company, whose videoconferencing platform has become a pandemic essential, on Tuesday said it expects to grant its underwriter a 30-day option to buy up to an additional $225 million of Class A shares at the public offering price, less underwriting discounts and commissions.

Founded in 2011, Zoom raised $447.9 million in net proceeds through its initial public offering, according to one of its quarterly filings in 2019. Its shares fell 1.7% in premarket trading Tuesday but have surged over the past year as homebound workers and students have been using the company's services during the coronavirus pandemic.

Zoom's global boost in popularity has put it at the center of a rivalry among technology companies pushing their services for managing daily life during the pandemic, pitting it against far larger rivals such as Microsoft Corp. and Facebook Inc. The company in November posted a record $772.2 million in quarterly sales and lifted its outlook.

Zoom has seen a large increase in its paying subscriber numbers during the pandemic. The company expects its free service to continue weighing on profitability, Zoom said in November. "With the uncertainty of the longevity of the pandemic, it is unclear how long gross margins will be impacted as we remain committed to supporting the global community," Finance Chief Kelly Steckelberg said.

Write to Dave Sebastian at dave.sebastian@wsj.com

(END) Dow Jones Newswires

01-12-21 0937ET