REGENXBIO Inc. — Director's Dealing 2017

May 10, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: REGENXBIO Inc. (RGNX)
CIK: 0001590877
Period of Report: 2017-05-08

Reporting Person: HAYDEN DONALD J JR (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-05-08	Common Stock	S	10000	$18.35	Disposed	8599	Direct

Footnotes

F1: This transaction was effected pursuant to a Rule 10b5-1 trading plan.

F2: This transaction was executed in multiple trades at prices ranging from $18.10 to $18.70. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.