13D Filing: James E. Flynn and AveXis Inc (AVXS)

CUSIP No.  05366U100

13D/A

Page 12 of 15 Pages

(4)       Deerfield
Private Design Fund III

Sole power to vote or direct the vote: 0

Shared power to vote or direct the vote:
1,077,997

Sole power to dispose or to direct the disposition:
0

Shared power to dispose or direct the disposition:
1,077,997

(5)       Deerfield
Partners

Sole power to vote or direct the vote: 0

Shared power to vote or direct the vote:
160,143

Sole power to dispose or to direct the disposition:
0

Shared power to dispose or direct the disposition:
160,143

(6)       Deerfield
International Master Fund

Sole power to vote or direct the vote: 0

Shared power to vote or direct the vote:
111,286

Sole power to dispose or to direct the disposition:
0

Shared power to dispose or direct the disposition:
111,286

(7)       Deerfield
Mgmt III

Sole power to vote or direct the vote: 0

Shared power to vote or direct the vote:
1,077,997

Sole power to dispose or to direct the disposition:
0

Shared power to dispose or direct the disposition:
1,077,997

(8)       Flynn

Sole power to vote or direct the vote: 0

Shared power to vote or direct the vote:
1,547,386

Sole power to dispose or to direct the disposition:
0

Shared power to dispose or direct the disposition:
1,547,386

Flynn is the sole member of the general
partner of each of Deerfield Mgmt, Deerfield Mgmt III and Deerfield Management. Deerfield Mgmt is the general partner, and Deerfield
Management is the investment advisor, of Deerfield Special Situations Fund, Deerfield Partners and Deerfield International Master
Fund. Deerfield Mgmt III is the general partner, and Deerfield Management is the investment advisor, of Deerfield Private Design
Fund III.

(c) Transactions in the Common Stock effected
by the Reporting Persons in the last sixty (60) days are set forth on Schedule A to this Amendment. All of the transactions reflected
in Schedule A to this Amendment were effected in open market transactions on the Nasdaq Global Select Market in the ordinary course
of the applicable Reporting Person’s business.