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

(c) Transactions in the Common Stock effected
by the Reporting Persons since the filing of Amendment No. 3 to the Schedule 13D are set forth on Schedule A to this Amendment.
Except for the Leff Option Exercise (as defined in Schedule A to this Amendment) and the Rebalancing Trade (as defined in 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.