The Sunday Sun sold 3,213,613 copies on its debut, with a cover price of 50p. Its impact on its tabloid rivals, which also ran with a 50p cover price, was immediate.
The Sunday Mirror was down 9.06% month on month to 1,594,293, The People dropped 9.02% to 701,246, and the Daily Star Sunday, fell 7.09% to 599,078.
Elsewhere, The Mail on Sunday was down 2.01% month on month to 1,882,469 and the Sunday Express was down 6.60% to 567,800.
Today’s figure for The Sun is in line with Rupert Murdoch's own estimation of 3.26 million announced in a tweet just one day after the launch issue.
Follow Arif Durrani on Twitter @DurraniMix