X0508 4 2025-01-02 false 0001590877 REGENXBIO Inc. RGNX 0001789335 Chan Mitchell C/O REGENXBIO INC. 9804 MEDICAL CENTER DRIVE ROCKVILLE MD 20850 false true false false Chief Financial Officer false Stock Options (Right to buy) 7.86 2025-01-02 4 A false 62547.00 0.00 A 2035-01-02 Common Stock 62547.00 62547.00 D 25% of the shares subject to this option shall vest after 12 months of continuous service with the Issuer. The balance will vest in equal monthly installments over the 36 months following January 2, 2026 while the optionee provides continuous service to the Issuer. /s/ Patrick J. Christmas as attorney-in-fact 2025-01-06