Shares of Walgreens Boots Alliance (WBA) rose Tuesday premarket after the Wall Street Journal reported that Sycamore Partners was closing in on a deal to acquire the U.S. pharmacy chain for about $10 billion.

Sycamore Partners is nearing an acquisition of Walgreens Boots Alliance Inc., people with knowledge of the matter said, in a deal that could end the drugstore operator’s tumultuous run as a public company.

The companies are putting the final touches on a transaction that may be announced as soon as this week, sources said.