0001590877 2020-11-04 2020-11-04 false 0001590877 8-K 2020-11-04 REGENXBIO Inc. DE 001-37553 47-1851754 9600 Blackwell Road Suite 210 Rockville MD 20850 240 552-8181 false false false false Common Stock, $0.0001 par value per share RGNX NASDAQ false