0001818331 2021-10-08 2021-10-08 0001818331 us-gaap:CommonClassAMember 2021-10-08 2021-10-08 0001818331 false 8-K 2021-10-08 Sema4 Holdings Corp. DE 001-39482 85-1966622 333 Ludlow Street, North Tower, 8th Floor 06902 Stamford, CT 800 298-6470 false false false false Class A common stock, par value $0.0001 per share SMFR NASDAQ Warrants to purchase one share of Class A common stock, each at an exercise price of $11.50 per share SMFRW NASDAQ true false