SEC Seal
SEC Banner
Search the Next-Generation EDGAR System
Filing Detail
Form 3 - Initial statement of beneficial ownership of securities:
SEC Accession No. 0000935836-23-000535
Filing Date
2023-07-31
Accepted
2023-07-31 13:55:45
Documents
1
Period of Report
2023-07-27

Document Format Files

Seq Description Document Type Size
1 ownership.html 3  
1 ownership.xml 3 3556
  Complete submission text file 0000935836-23-000535.txt   5141
Mailing Address 840 MEMORIAL DRIVE CAMBRIDGE MA 02139
Business Address 840 MEMORIAL DRIVE CAMBRIDGE MA 02139 617-498-0020
Mersana Therapeutics, Inc. (Issuer) CIK: 0001442836 (see all company filings)

IRS No.: 000000000 | State of Incorp.: DE | Fiscal Year End: 1231
SIC: 2834 Pharmaceutical Preparations

Mailing Address 357 TEHAMA STREET #3 SAN FRANCISCO CA 94103
Business Address 357 TEHAMA STREET #3 SAN FRANCISCO CA 94103 415-448-6534
EcoR1 Capital, LLC (Reporting) CIK: 0001587114 (see all company filings)

State of Incorp.: DE | Fiscal Year End: 1231
Type: 3 | Act: 34 | File No.: 001-38129 | Film No.: 231126454