MERSANA THERAPEUTICS INC

CUSIP: 59045L106 Class: COM

WESTFIELD CAPITAL MANAGEMENT CO LP's Holding History (CIK: 0001177719)

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

Q2 2021
Shares 2,108,810 Value ($000) $28,638 Avg Close — Range —
Q1 2021
Shares 1,998,638 Value ($000) $32,338 Avg Close — Range —
Q4 2020
Shares 462,378 Value ($000) $12,304 Avg Close — Range —