Thursday has been decided as the deadline for the bids to be submitted.
Boston Celtics co-owner Steve Pagliuca has submitted his bid on Tuesday who was a surpise name on the shortlist.
He is one of the four bidders to have reached this stage along with a consortium headed by LA Lakers owner Todd Boehly, Ricketts family that owns the Chicago Cubs and third by British businessman Sir Martin Broughton.
“This process has been a disconcerting time for the football club and fans,” Pagliuca said. “Throughout my life and career, my ethos has always been to operate quietly, with integrity, and let my actions and results speak loudly.
“However, it is imperative to clarify and assure supporters about our bid group and its commitments, to emphasise how seriously we take our potential responsibility to Chelsea.
“Later this week we will submit a substantial and credible bid proposal — one that we expect will meet the respective requirements and regulations of the Premier League, UK Government and UEFA — and we pledge to honour our commitment to credibility and good guardianship of Chelsea Football Club from day one.”