REGENXBIO INC

Ticker: RGNX CUSIP: 75901B107 Class: Common Stock

Atika Capital Management LLC's Holding History (CIK: 0001599731)

Note: Option positions (PUT/CALL) are excluded.

Q4 2017

Shares 60,000 Value ($000) $1,995 Avg Close $30.13 Range $24.35 - $36.10

Q3 2017

Shares 30,000 Value ($000) $988 Avg Close $22.51 Range $17.60 - $33.85

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2017	60,000	$1,995	$30.13	$24.35 - $36.10
Q3 2017	30,000	$988	$22.51	$17.60 - $33.85