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.

Walgreens Boots Alliance is nearing a deal to sell itself to private equity firm Sycamore Partners for around $10 billion. The transaction could be announced as soon as Thursday, according to people familiar with the matter.

Bankers are working on funding packages of around $12 billion for Walgreens Boots Alliance Inc. to back a potential take-private deal by Sycamore Partners, in what would be one of the largest leverage buyout debt deals since the great financial crisis.