MERSANA THERAPEUTICS INC

CUSIP: 59045L106 Class: COM

FIRST TRUST ADVISORS LP's Holding History (CIK: 0001125816)

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

Q1 2021
Shares 59,685 Value ($000) $966 Avg Close — Range —
Q4 2020
Shares 44,997 Value ($000) $1,197 Avg Close — Range —