0001709401 2022-08-09 2022-08-09 false 0001709401 8-K 2022-08-09 RUBIUS THERAPEUTICS, INC. DE 001-38586 46-2688109 399 Binney Street Suite 300 Cambridge MA 02139 (617) 679-9600 false false false false Common Stock, par value $0.001 per share RUBY NASDAQ false