MERSANA THERAPEUTICS INC

CUSIP: 59045L106 Class: COM

VIRGINIA RETIREMENT SYSTEMS ET AL's Holding History (CIK: 0001005354)

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

Q4 2020
Shares 15,100 Value ($000) $402 Avg Close — Range —
Q3 2020
Shares 19,500 Value ($000) $363 Avg Close — Range —
Q2 2020
Shares 21,500 Value ($000) $503 Avg Close — Range —