MERSANA THERAPEUTICS INC

CUSIP: 59045L205 Class: COM

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q4 2025
Shares 1,073 Value ($000) $31 Avg Close — Range —
Q3 2025
Shares 961 Value ($000) $7 Avg Close — Range —