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

CUSIP No.  05366U100

13D/A

Page 11 of 15 Pages

(5)       Deerfield Partners

Number of Shares: 160,143

Percentage of Shares: 0.50%*

(6)       Deerfield
International Master Fund

Number of Shares: 111,286

Percentage of Shares: 0.35%*

(7)       Deerfield
Mgmt III

Number of shares: 1,077,997
(comprised of shares held by Deerfield Private Design Fund III)

Percentage of shares: 3.37%*

(8)       Flynn

Number of shares: 1,547,386
(comprised of shares held by Deerfield Special Situations Fund, Deerfield Partners, Deerfield International Master Fund, Deerfield
Private Design Fund III)

Percentage of shares: 4.84%*

*Percentage beneficial ownership reported herein reflects 31,976,418
shares of Common Stock outstanding as of November 8, 2017, as reported in the Company’s Quarterly Report on Form 10-Q for
the quarterly period ended September 30, 2017.

(b)

(1)        Deerfield
Mgmt

Sole power to vote or direct the vote: 0

Shared power to vote or direct the vote:
469,389

Sole power to dispose or to direct the disposition:
0

Shared power to dispose or direct the disposition:
469,389

(2)       Deerfield
Management

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

(3)       Deerfield
Special Situations Fund

Sole power to vote or direct the vote: 0

Shared power to vote or direct the vote:
197,960

Sole power to dispose or to direct the disposition: 0

Shared power to dispose or direct the disposition:
197,960