Venrock Healthcare Capital Partners III, L.P. - Mar 31, 2025 SCHEDULE 13G/A Report for MERSANA THERAPEUTICS, INC. Common Stock, $0.0001 par value per share (MRSN)

Filing Manager: Venrock Healthcare Capital Partners III, L.P.
Reporting Manager: Venrock Healthcare Capital Partners III, L.P.
Security: MERSANA THERAPEUTICS, INC. Common Stock, $0.0001 par value per share
Symbol: MRSN
Shares outstanding: 123M shares
Disclosed Ownership: 3.57M shares
Ownership: 2.9%
Form type: SCHEDULE 13G/A
Date filed: 5/15/2025, 05:48 PM
Date of event: Mar 31, 2025
Previous filing: Feb 14, 2025
SEC: View on sec.gov

Reporting Managers (7)

Name	Ownership	Shares Owned	shared voting power	Signature	Title
Venrock Healthcare Capital Partners III, L.P.	2.9%	3.57M	3.57M	/s/ Sherman G. Souther	By VHCP Management III, LLC, its General Partner, By Sherman G. Souther, Authorized Signatory
VHCP Co-Investment Holdings III, LLC	2.9%	3.57M	3.57M	/s/ Sherman G. Souther	By VHCP Management III, LLC, its Manager, By Sherman G. Souther, Authorized Signatory
Venrock Healthcare Capital Partners EG, L.P.	2.9%	3.57M	3.57M	/s/ Sherman G. Souther	By VHCP Management EG, LLC, its General Partner, By Sherman G. Souther, Authorized Signatory
VHCP Management III, LLC	2.9%	3.57M	3.57M	/s/ Sherman G. Souther	By Sherman G. Souther, Authorized Signatory
VHCP Management EG, LLC	2.9%	3.57M	3.57M	/s/ Sherman G. Souther	By Sherman G. Souther, Authorized Signatory
Nimish Shah	2.9%	3.57M	3.57M	/s/ Sherman G. Souther	By Sherman G. Souther, Attorney-in-fact
Bong Y Koh	2.9%	3.57M	3.57M	/s/ Sherman G. Souther	By Sherman G. Souther, Attorney-in-fact

Showing 1 to 7 of 7 entries