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

CUSIP No.  05366U100

13D/A

Page 11 of 15 Pages

(3)        Deerfield
Special Situations Fund

Number of shares: 413,611

Percentage
of shares 1.49%*

(4)       Deerfield
Private Design Fund III

Number of shares: 1,623,089

Percentage of shares: 5.84%*

(5)       Deerfield
Partners

Number of Shares: 88,000

Percentage of Shares: 0.32%*

(6)       Deerfield
International Master Fund

Number of Shares: 112,000

Percentage of Shares: 0.40%*

(7)       Deerfield
Mgmt III

Number of shares: 1,623,089
(comprised of shares held by Deerfield Private Design Fund III)

Percentage of shares: 5.84%*

(8)       Flynn

Number of shares:

2,252,128 (comprised of shares held by Deerfield Special Situations Fund, Deerfield Partners, Deerfield International Master Fund and Deerfield Private Design Fund III, and 15,428 shares underlying options held by Jonathan Leff, to the extent such options are vested)

Percentage of shares: 8.10%*

*Percentage beneficial ownership reported herein reflects 27,794,558
shares of Common Stock outstanding as of May 11, 2017, as reported in the Company’s Quarterly Report on Form 10-Q for the
quarterly period ended March 31, 2017.

(b)

(1)        Deerfield
Mgmt

Sole power to vote or direct the vote: 0

Shared power to vote or direct the vote:
613,611

Sole power to dispose or to direct the disposition:
0

Shared power to dispose or direct the disposition:
613,611