Avexis Inc. (AVXS): RA Capital Management Ups Its Stake

Page 2 of 8 – SEC Filing

CUSIP No. 05366U100

13G

	1.	Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only). RA Capital Management, LLC
	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)	¨
		(b)	¨
	3.	SEC Use Only
	4.	Citizenship or Place of Organization         Massachusetts
Number of Shares Beneficially Owned by Each Reporting Person With			5.	Sole Voting Power                           0 shares
			6.	Shared Voting Power            1,890,796 shares
			7.	Sole Dispositive Power                 0 shares
			8.	Shared Dispositive Power      1,890,796 shares
	9.	Aggregate Amount Beneficially Owned by Each Reporting Person 1,890,796 shares
	10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)      ¨
	11.	Percent of Class Represented by Amount in Row (9) 6.8%1
	12.	Type of Reporting Person (See Instructions) IA

¹
The reporting person is the beneficial owner of 1,890,796 shares of the Issuer’s Common Stock which constitute approximately
6.8% of the Issuer’s outstanding Common Stock shares. The percentage calculation assumes that there are currently 27,676,288
outstanding shares of Common Stock of the Issuer, based on the Issuer’s Form 10-Q as filed with the Securities and Exchange
Commission (“SEC”) on November 10, 2016.