https://clinicaltrials.gov/ct2/show/NCT04368728 (Pfizer, >40000 participants)
https://clinicaltrials.gov/ct2/show/NCT04470427 (Moderna, 30000 participants)
https://www.fda.gov/media/144245/download (53 pages)
https://fda.report/media/144673/Moderna+COVID-19+Vaccine+rev... (61 pages)
I think the actual applications had a thousand pages or so, but I haven't found them online.
https://clinicaltrials.gov/ct2/show/NCT04368728 (Pfizer, >40000 participants)
https://clinicaltrials.gov/ct2/show/NCT04470427 (Moderna, 30000 participants)