DoorDash Shares Rise 0.43% in Tuesday Premarket Trading.

DoorDash shares rose 0.43% in premarket trading Tuesday as the company and Instacart held advanced acquisition talks that could value the grocery platform at about $17 billion.

An agreement could come as soon as Wednesday, Oct. 28, though the talks could still fall apart. Neither company has announced a definitive agreement or disclosed payment terms.

A deal could value Instacart at about $17 billion, roughly 42% above its estimated $12 billion market capitalization before sale reports emerged Friday. That figure is not a confirmed price. The discussions follow Instacart's earlier sale exploration, covered in TokenPost's earlier account of the process.

DoorDash closed Monday at $168.44, down 6.1% for the session and 9.4% from its Oct. 22 close. Instacart shares rose 7.87% Monday, closing at $60.88, after gaining 9.21% Friday.

DoorDash's delivery network spans restaurants, groceries and retail. Instacart operates a grocery marketplace and provides retailer technology and advertising services.