13G Filing: RTW Investments, LP and Regenxbio Inc. (RGNX)

Item
1.

(a).

Name
of Issuer:

Regenxbio
Inc

(b).

Address
of issuer’s principal executive offices:

9600
Blackwell Road, Suite 210

Item
2.

(a).

Name
of person filing:

RTW
Investments, LP

(b).

Address
or principal business office or, if none, residence:

RTW
Investments, LP

Roderick
Wong

c/o
RTW Investments, LP

(c).

Citizenship:

RTW
Investments, LP – Delaware

(d).

Title
of class of securities:

Common
Stock, $0.001 par value per share

(e).

CUSIP
No.:

75901B107