0001590877 2025-08-18 2025-08-18 0001590877 false 8-K 2025-08-18 REGENXBIO Inc. DE 001-37553 47-1851754 9804 Medical Center Drive Rockville MD 20850 240 552-8181 N/A false false false false Common Stock, par value $0.0001 per share RGNX NASDAQ false