Appears that McLaren have lost key sponsorships of Chandon, NTT communications and Airgain according to their partners page on their website. Chandon presumably were a key partner monetary wise as they had good exposure on the overalls and car. NTT also we’re on the rear wing end plate. Airgain whilst a sponsor seemed minimal.
Given the fact that Chandon was on the side of the car and there was already vast space there, you’d like to think Zak has sponsors lined up otherwise the car may be looking threadbare. Hopefully some big brands and big sponsorships are to come.
Interesting to note that Kimoa and Coca-Cola are still listed as sponsors. Therefore the above comments noting about Alonso buying into the team may not be too far from the truth as well as McLaren potentially signing up Coca-Cola for the longer term.