In November, a report alleged that Amazon (NASDAQ: AMZN) would lay off around 10,000 employees in a round of peak-season job cuts. Now, the figure is confirmed to be significantly higher.

In an internal memo that was released publicly by Amazon Thursday morning, CEO Andy Jassy said that the number of employees affected by the layoffs will ultimately be over 18,000. Jassy added that several teams are being affected by the pullback but that the majority are in the firm’s Stores and People Experience and Technology (PXT) organizations.

The cuts represent one of the largest rounds of layoffs in history. It’s also the largest head count reduction among tech companies that have recently trimmed their workforces.