AVEXIS INC

CUSIP: 05366U100 Class: Common equity shares

BAKER BROS. ADVISORS LP's Holding History (CIK: 0001263508)

Note: Option positions (PUT/CALL) are excluded.

Q1 2018
Shares 1,167,157 Value ($000) $144,237 Avg Close — Range —
Q4 2017
Shares 775,000 Value ($000) $85,769 Avg Close — Range —
Q3 2017
Shares 775,000 Value ($000) $74,966 Avg Close — Range —
Q2 2017
Shares 625,000 Value ($000) $51,350 Avg Close — Range —
Q1 2017
Shares 500,000 Value ($000) $38,015 Avg Close — Range —
Q4 2016
Shares 315,300 Value ($000) $15,049 Avg Close — Range —