Walgreens Boots Alliance is being taken private in a deal valued up to $23.7 billion, following a largely disastrous run on the public markets where its market cap has lost billions and more than 10% of its locations have closed.

Shares of Walgreens Boots Alliance have lost about half their value in the past year, as the chain has faced pressure in its retail and pharmacy businesses.

Walgreens Boots Alliance says it has agreed to be acquired by private equity firm Sycamore Partners as the struggling retailer looks to turn itself around after years of losing money. Walgreens said Thursday that Sycamore will pay $11.