BlackRock, Inc. - Mar 31, 2025 SCHEDULE 13G/A Report for MERSANA THERAPEUTICS INC Common Stock (MRSN)

Filing Manager: BlackRock, Inc.
Reporting Manager: BlackRock, Inc.
Security: MERSANA THERAPEUTICS INC Common Stock
Symbol: MRSN
Shares outstanding: 124M shares
Disclosed Ownership: 8.32M shares
Ownership: 6.7%
Form type: SCHEDULE 13G/A
Date filed: 4/17/2025, 09:35 AM
Date of event: Mar 31, 2025
Previous filing: Feb 5, 2025
Next filing: Jul 17, 2025
SEC: View on sec.gov

Reporting Managers (1)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
BlackRock, Inc.	6.7%	8.32M	8.22M	0	Spencer Fleming	Managing Director