REGENXBIO to Host Conference Call on March 6 to Discuss Fourth Quarter and Full-Year 2017 Financial Results and Recent Operational Highlights

REGENXBIO Inc. (Nasdaq:RGNX), a leading clinical-stage biotechnology company seeking to improve lives through the curative potential of gene therapy based on its proprietary NAV® Technology Platform, today announced that it will host a conference call on Tuesday, March 6, 2018 at 4:30 p.m. ET to discuss its financial results for the quarter and full year ended December 31, 2017 and recent operational highlights.

To access the live call by phone, dial (855) 422-8964 (domestic) or (210) 229-8819 (international), and enter the passcode 1584469. To access a live or recorded webcast of the call, please visit the “Investors” section of the REGENXBIO website at www.regenxbio.com . The recorded webcast will be available for approximately 30 days following the call.

About REGENXBIO Inc.

REGENXBIO is a leading clinical-stage biotechnology company seeking to improve lives through the curative potential of gene therapy. REGENXBIO’s NAV® Technology Platform, a proprietary adeno-associated virus (AAV) gene delivery platform, consists of exclusive rights to more than 100 novel AAV vectors, including AAV7, AAV8, AAV9 and AAVrh10. REGENXBIO and its third-party NAV Technology Platform Licensees are applying the NAV Technology Platform in the development of a broad pipeline of candidates in multiple therapeutic areas.

CONTACT:

Investors Natalie Wildenradt, 646-681-8192 [email protected]

Media Adam Pawluk, 202-591-4063 [email protected]