ARSANIS INC

CUSIP: 042873109 Class: COM

ORBIMED ADVISORS LLC's Holding History (CIK: 0001055951)

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

Q4 2018
Shares 1,868,966 Value ($000) $4,336 Avg Close — Range —
Q3 2018
Shares 1,868,966 Value ($000) $3,028 Avg Close — Range —
Q2 2018
Shares 1,868,966 Value ($000) $6,784 Avg Close — Range —
Q1 2018
Shares 1,868,966 Value ($000) $42,781 Avg Close — Range —
Q4 2017
Shares 1,868,966 Value ($000) $23,848 Avg Close — Range —