The company announced the deal earlier on Monday, a move that would end the Graham family's 80-year ownership of one of the US' most influential publications.
Williams Grand Prix Holdings (WGPH) published results for 2019 showing Formula One revenue slid to 95.4 million pounds ($117.6 million) in 2019, down from 130.7 million pounds the previous year.
Apple still has a request pending for a sales ban against newer Samsung phones in that proceeding.
The eight-year-old online messaging service gave potential investors their first glance at its financials on Thursday when it publicly filed its IPO documents, setting the stage for one of the most-anticipated debuts in over a year.