SoftBank Group Corp. will this week launch a previously agreed tender offer for as much as $3 billion of WeWork shares, including up to $970 million owned by the office sharing company's cofounder, Adam Neumann, two people familiar with the matter said.

The tender offer to the founders, investors and employees owning stock was expected to launch earlier this month but was delayed after SoftBank sought technical revisions to the offer documents, according to the sources.

It will go ahead based on the previously announced terms at $19.19 a WeWork share as soon as Monday, these people said.