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

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Page 11 of 15 – SEC Filing

CUSIP
No.  05366U100
13D/A Page 11 of 15 Pages
Number of shares: 685,040
(comprised of shares held by Deerfield Special Situations Fund, Deerfield Partners and Deerfield International Master Fund)

Percentage of shares: 2.15%*

(2)       Deerfield
Management

Number of shares: 2,324,060
(comprised of shares held by Deerfield Special Situations Fund, Deerfield Private Design Fund III, Deerfield Partners and Deerfield
International Master Fund, and 15,931 shares underlying options held by Jonathan Leff, to the extent such options are vested)

Percentage of shares: 7.28%*

(3)       Deerfield
Special Situations Fund

Number of shares: 413,611

Percentage of shares: 1.30%*

(4)       Deerfield
Private Design Fund III

Number of shares: 1,623,089

Percentage of shares: 5.08%*

(5)       Deerfield
Partners

Number of Shares: 119,429

Percentage of Shares: 0.37%*

(6)       Deerfield
International Master Fund

Number of Shares: 152,000

Percentage of Shares: 0.48%*

(7)       Deerfield
Mgmt III

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

Percentage of shares: 5.08%*

(8)       Flynn

Number of shares: 2,324,060
(comprised of shares held by Deerfield Special Situations Fund, Deerfield Partners, Deerfield International Master Fund and Deerfield
Private Design Fund III, and 15,931 shares underlying options held by Jonathan Leff, to the extent such options are vested)

Percentage of shares: 7.28%*

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