The two companies announced their plan on Monday to buy a majority stake in Dell and $10 billion in Office Depot shares.
The merger will give the two companies control of the world’s largest notebook and desktop printer and could allow them to build their business around the cloud computing industry, which has been gaining momentum in recent years.
Dell and Office are facing intense competition from Amazon and Apple as well as a growing number of smaller companies and consumers looking for a cheaper option.
Dell and Microsoft are the top two vendors of Windows PCs and Office, but Apple and Google dominate Android devices.
Shares of both companies have gained steadily in recent weeks.