https://www.hollywoodreporter.com/heat-vision/tom-hollands-last-minute-appeal-helped-seal-a-spider-man-deal-1244688
In January, a more modest 25-25 proposal was put on the table.
Sources say Sony didn't counter for almost six months, so in June, before the opening of Spider-Man:

ディズニーは2019年1月には２５％の案も出してたが、ソニーはその案も6か月ずっと無視してたのか
それで8月についに決裂と