In SpaceX’s case, appetite was exceptionally high. The underwriters, which included Goldman Sachs, Bank of America, and JPMorgan, exercised the option in full, purchasing an additional 83.3 million shares directly from the company to meet the huge demand.
Source: https://www.bbc.com/news/articles/cgrk21wnvy9o?at_medium=RSS&at_campaign=rss