0001590877 2026-05-29 2026-05-29 0001590877 false 8-K 2026-05-29 REGENXBIO Inc. DE 001-37553 47-1851754 9804 Medical Center Drive Rockville MD 20850 240 552-8181 false false false false Common Stock, par value $0.0001 per share RGNX NASDAQ false