ARSANIS INC

CUSIP: 042873109 Class: COM

Tower Research Capital LLC (TRC)'s Holding History (CIK: 0001533421)

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

Q4 2018
Shares 30 Value ($000) $0 Avg Close — Range —
Q3 2018
Shares 1,427 Value ($000) $2 Avg Close — Range —
Q2 2018
Shares 2,570 Value ($000) $9 Avg Close — Range —
Q1 2018
Shares 1,913 Value ($000) $44 Avg Close — Range —