Mersana Therapeutics, Inc.

Symbol
MRSN on Nasdaq
Entity
Company
Business address
840 Memorial Drive, 02139 Cambridge, MA
Phone
617-498-0020
State of incorporation
DE
Fiscal year end
December 31
Category
Non-accelerated filer
Smaller reporting company
All SEC filings
View on sec.gov
Get insider transactions for this issuer
Mersana Therapeutics, Inc. has filed 652 SEC EDGAR filings since 8/12/2008

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
4 Open Document Open Filing OWNERSHIP DOCUMENT Sep 15, 2025 Sep 11, 2025
8-K Open Document | Data Open Filing FORM 8-K Sep 5, 2025 Sep 5, 2025 001-38129
SCHEDULE 13G/A Open Document Open Filing Aug 14, 2025 005-90033
10-Q Open Document | Data Open Filing 10-Q Aug 13, 2025 Jun 30, 2025 001-38129
8-K Open Document | Data Open Filing FORM 8-K Aug 13, 2025 Aug 13, 2025 001-38129
8-K Open Document | Data Open Filing FORM 8-K Jul 24, 2025 Jul 24, 2025 001-38129
SCHEDULE 13G/A Open Document Open Filing Jul 17, 2025 005-90033
8-K Open Document | Data Open Filing FORM 8-K Jul 3, 2025 Jul 1, 2025 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 13, 2025 Jun 12, 2025
4 Open Document Open Filing 4 Jun 13, 2025 Jun 12, 2025
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 13, 2025 Jun 12, 2025
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 13, 2025 Jun 12, 2025
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 13, 2025 Jun 12, 2025
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 13, 2025 Jun 12, 2025
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 13, 2025 Jun 12, 2025
8-K Open Document | Data Open Filing FORM 8-K Jun 13, 2025 Jun 12, 2025 001-38129
8-K Open Document | Data Open Filing FORM 8-K Jun 2, 2025 Jun 2, 2025 001-38129
SCHEDULE 13G/A Open Document Open Filing May 15, 2025 005-90033
SCHEDULE 13G Open Document Open Filing May 15, 2025 005-90033
SCHEDULE 13G/A Open Document Open Filing May 15, 2025 005-90033
10-Q Open Document | Data Open Filing 10-Q May 15, 2025 Mar 31, 2025 001-38129
8-K Open Document | Data Open Filing FORM 8-K May 15, 2025 May 15, 2025 001-38129
8-K Open Document | Data Open Filing FORM 8-K May 6, 2025 May 5, 2025 001-38129
SCHEDULE 13G/A Open Document Open Filing Apr 30, 2025 005-90033
ARS Open Document Open Filing ARS Apr 29, 2025 Dec 31, 2024 001-38129
DEFA14A Open Document Open Filing DEFA14A Apr 29, 2025 001-38129
DEF 14A Open Document | Data Open Filing DEF 14A Apr 29, 2025 Jun 12, 2025 001-38129
PRE 14A Open Document | Data Open Filing PRE 14A Apr 18, 2025 Jun 12, 2025 001-38129
SCHEDULE 13G/A Open Document Open Filing Apr 17, 2025 005-90033
10-K Open Document | Data Open Filing 10-K Mar 3, 2025 Dec 31, 2024 001-38129
8-K Open Document | Data Open Filing FORM 8-K Mar 3, 2025 Mar 3, 2025 001-38129
8-K Open Document | Data Open Filing FORM 8-K Feb 28, 2025 Feb 25, 2025 001-38129
SCHEDULE 13G/A Open Document Open Filing Feb 14, 2025 005-90033
SCHEDULE 13G/A Open Document Open Filing Feb 5, 2025 005-90033
8-K Open Document | Data Open Filing FORM 8-K Feb 5, 2025 Feb 5, 2025 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 17, 2025 Jan 15, 2025
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 17, 2025 Jan 15, 2025
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 17, 2025 Jan 15, 2025
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 17, 2025 Jan 15, 2025
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 17, 2025 Jan 15, 2025
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 17, 2025 Jan 15, 2025
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 17, 2025 Jan 15, 2025
144 Open Document Open Filing Jan 17, 2025 001-38129
144 Open Document Open Filing Jan 17, 2025 001-38129
144 Open Document Open Filing Jan 17, 2025 001-38129
144 Open Document Open Filing Jan 17, 2025 001-38129
144 Open Document Open Filing Jan 17, 2025 001-38129
144 Open Document Open Filing Jan 17, 2025 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 16, 2025 Jan 14, 2025
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 16, 2025 Jan 14, 2025
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 16, 2025 Jan 14, 2025
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 16, 2025 Jan 14, 2025
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 16, 2025 Jan 14, 2025
144 Open Document Open Filing Jan 16, 2025 001-38129
144 Open Document Open Filing Jan 16, 2025 001-38129
144 Open Document Open Filing Jan 16, 2025 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 15, 2025 Jan 13, 2025
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 15, 2025 Jan 13, 2025
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 15, 2025 Jan 13, 2025
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 15, 2025 Jan 13, 2025
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 15, 2025 Jan 13, 2025
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 15, 2025 Jan 13, 2025
144 Open Document Open Filing Jan 15, 2025 001-38129
S-8 Open Document Open Filing FORM S-8 Jan 14, 2025 333-284273
8-K Open Document | Data Open Filing FORM 8-K Jan 10, 2025 Jan 10, 2025 001-38129
8-K Open Document | Data Open Filing FORM 8-K Jan 10, 2025 Jan 10, 2025 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 3, 2025 Jan 2, 2025
3 Open Document Open Filing Dec 30, 2024 Dec 20, 2024
SCHEDULE 13G/A Open Document Open Filing Dec 26, 2024 005-90033
SCHEDULE 13G/A Open Document Open Filing Dec 23, 2024 005-90033
4 Open Document Open Filing Dec 23, 2024 Dec 19, 2024
8-K Open Document | Data Open Filing FORM 8-K Dec 19, 2024 Dec 19, 2024 001-38129
SC 13D/A Open Document Open Filing SC 13D/A Nov 15, 2024 005-90033
SC 13G/A Open Document Open Filing SC 13G/A Nov 14, 2024 005-90033
SC 13G/A Open Document Open Filing SC 13G/A Nov 14, 2024 005-90033
10-Q Open Document | Data Open Filing 10-Q Nov 13, 2024 Sep 30, 2024 001-38129
8-K Open Document | Data Open Filing FORM 8-K Nov 13, 2024 Nov 13, 2024 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Oct 29, 2024 Oct 25, 2024
144 Open Document Open Filing Oct 29, 2024 001-38129
SC 13G/A Open Document Open Filing SC 13G/A Oct 15, 2024 005-90033
4 Open Document Open Filing OWNERSHIP DOCUMENT Oct 7, 2024 Oct 1, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Oct 7, 2024 Oct 1, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Oct 7, 2024 Oct 1, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Oct 7, 2024 Oct 1, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Oct 7, 2024 Oct 1, 2024
144 Open Document Open Filing Oct 7, 2024 001-38129
144 Open Document Open Filing Oct 7, 2024 001-38129
144 Open Document Open Filing Oct 7, 2024 001-38129
144 Open Document Open Filing Oct 7, 2024 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Oct 3, 2024 Oct 1, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Sep 13, 2024 Sep 11, 2024
144 Open Document Open Filing Sep 13, 2024 001-38129
10-Q Open Document | Data Open Filing 10-Q Aug 13, 2024 Jun 30, 2024 001-38129
8-K Open Document | Data Open Filing FORM 8-K Aug 13, 2024 Aug 13, 2024 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Jul 2, 2024 Jul 1, 2024
4 Open Document Open Filing 4 Jun 12, 2024 Jun 11, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 12, 2024 Jun 11, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 12, 2024 Jun 11, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 12, 2024 Jun 11, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 12, 2024 Jun 11, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 12, 2024 Jun 11, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 12, 2024 Jun 11, 2024
8-K Open Document | Data Open Filing FORM 8-K Jun 11, 2024 Jun 11, 2024 001-38129
SC 13G Open Document Open Filing SC 13G May 17, 2024 005-90033
EFFECT Open Document Open Filing May 9, 2024 333-271766
424B5 Open Document Open Filing 424B5 May 9, 2024 333-271766
10-Q Open Document | Data Open Filing 10-Q May 9, 2024 Mar 31, 2024 001-38129
8-K Open Document | Data Open Filing FORM 8-K May 9, 2024 May 9, 2024 001-38129
ARS Open Document Open Filing ARS Apr 26, 2024 Dec 31, 2023 001-38129
DEFA14A Open Document Open Filing DEFA14A Apr 26, 2024 001-38129
DEF 14A Open Document Open Filing SCHEDULE 14A Apr 26, 2024 Jun 11, 2024 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Apr 3, 2024 Apr 1, 2024
8-K Open Document | Data Open Filing FORM 8-K Feb 28, 2024 Feb 28, 2024 001-38129
424B5 Open Document Open Filing 424B5 Feb 28, 2024 333-271766
POS AM Open Document Open Filing POS AM Feb 28, 2024 333-271766
10-K Open Document | Data Open Filing 10-K Feb 28, 2024 Dec 31, 2023 001-38129
POSASR Open Document Open Filing POSASR Feb 28, 2024 333-271766
8-K Open Document | Data Open Filing FORM 8-K Feb 28, 2024 Feb 28, 2024 001-38129
4/A Open Document Open Filing OWNERSHIP DOCUMENT Feb 16, 2024 Jan 13, 2024
SC 13G/A Open Document Open Filing SC 13G/A Feb 14, 2024 005-90033
SC 13G Open Document Open Filing SCHEDULE FILED TO REPORT ACQUISITION OF BENEFICIAL OWNERSHIP Feb 14, 2024 005-90033
SC 13G/A Open Document Open Filing AMENDMENT NO. 1 Feb 14, 2024 005-90033
SC 13G/A Open Document Open Filing MERSANA THERAPEUTICS, INC. Feb 14, 2024 005-90033
SC 13G Open Document Open Filing SC 13G Feb 14, 2024 005-90033
SC 13G Open Document Open Filing SCHEDULE 13G Feb 13, 2024 005-90033
SC 13G/A Open Document Open Filing Jan 29, 2024 005-90033
SC 13G/A Open Document Open Filing Jan 22, 2024 005-90033
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 17, 2024 Jan 13, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 17, 2024 Jan 13, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 17, 2024 Jan 13, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 17, 2024 Jan 13, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 17, 2024 Jan 15, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 17, 2024 Jan 13, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 17, 2024 Jan 13, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 17, 2024 Jan 13, 2024
144 Open Document Open Filing Jan 16, 2024 001-38129
144 Open Document Open Filing Jan 16, 2024 001-38129
144 Open Document Open Filing Jan 16, 2024 001-38129
144 Open Document Open Filing Jan 16, 2024 001-38129
S-8 Open Document Open Filing FORM S-8 Jan 12, 2024 333-276492
8-K Open Document | Data Open Filing FORM 8-K Jan 5, 2024 Jan 5, 2024 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 4, 2024 Jan 2, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 4, 2024 Jan 2, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 4, 2024 Jan 2, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 4, 2024 Jan 2, 2024
8-K Open Document | Data Open Filing FORM 8-K Dec 21, 2023 Dec 15, 2023 001-38129
10-Q Open Document | Data Open Filing 10-Q Nov 7, 2023 Sep 30, 2023 001-38129
8-K Open Document | Data Open Filing FORM 8-K Nov 7, 2023 Nov 7, 2023 001-38129
8-K Open Document | Data Open Filing FORM 8-K Oct 31, 2023 Oct 31, 2023 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Oct 27, 2023 Oct 25, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Oct 4, 2023 Oct 2, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Oct 4, 2023 Oct 2, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Oct 4, 2023 Oct 2, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Oct 4, 2023 Oct 2, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Oct 4, 2023 Oct 2, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Sep 13, 2023 Sep 11, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Sep 13, 2023 Sep 11, 2023
8-K Open Document | Data Open Filing FORM 8-K Sep 12, 2023 Sep 12, 2023 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Sep 7, 2023 Sep 5, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Sep 7, 2023 Sep 5, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Sep 7, 2023 Sep 5, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Sep 7, 2023 Sep 5, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Sep 7, 2023 Sep 5, 2023
3 Open Document Open Filing OWNERSHIP DOCUMENT Sep 7, 2023 Sep 5, 2023
8-K Open Document | Data Open Filing FORM 8-K Sep 6, 2023 Sep 1, 2023 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Aug 18, 2023 Aug 16, 2023
10-Q Open Document | Data Open Filing 10-Q Aug 8, 2023 Jun 30, 2023 001-38129
8-K Open Document | Data Open Filing FORM 8-K Aug 8, 2023 Aug 8, 2023 001-38129
SC 13G Open Document Open Filing SC 13G Aug 7, 2023 005-90033
3 Open Document Open Filing Jul 31, 2023 Jul 27, 2023
SC 13G Open Document Open Filing Jul 27, 2023 005-90033
8-K Open Document | Data Open Filing FORM 8-K Jul 27, 2023 Jul 26, 2023 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Jul 6, 2023 Jul 3, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Jul 6, 2023 Jul 3, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Jul 6, 2023 Jul 3, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Jul 6, 2023 Jul 3, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Jul 6, 2023 Jul 3, 2023
8-K Open Document | Data Open Filing FORM 8-K Jun 15, 2023 Jun 15, 2023 001-38129
4 Open Document Open Filing FORM 4 SUBMISSION Jun 12, 2023 Jun 8, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 12, 2023 Jun 8, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 12, 2023 Jun 8, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 12, 2023 Jun 8, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 12, 2023 Jun 8, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 12, 2023 Jun 8, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 12, 2023 Jun 8, 2023
8-K Open Document | Data Open Filing FORM 8-K Jun 9, 2023 Jun 8, 2023 001-38129
S-3ASR Open Document Open Filing S-3ASR May 9, 2023 333-271766
10-Q Open Document | Data Open Filing 10-Q May 9, 2023 Mar 31, 2023 001-38129
8-K Open Document | Data Open Filing FORM 8-K May 9, 2023 May 9, 2023 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Apr 28, 2023 Apr 26, 2023
ARS Open Document Open Filing ARS Apr 28, 2023 Dec 31, 2022 001-38129
DEFA14A Open Document Open Filing DEFA14A Apr 28, 2023 001-38129
DEF 14A Open Document Open Filing DEF 14A Apr 28, 2023 Jun 8, 2023 001-38129
PRE 14A Open Document Open Filing PRE 14A Apr 14, 2023 Jun 8, 2023 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Apr 5, 2023 Apr 3, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Apr 5, 2023 Apr 3, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Apr 5, 2023 Apr 3, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Apr 5, 2023 Apr 3, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Apr 5, 2023 Apr 3, 2023
8-K Open Document | Data Open Filing FORM 8-K Mar 31, 2023 Mar 31, 2023 001-38129
8-K Open Document | Data Open Filing FORM 8-K Mar 24, 2023 Mar 23, 2023 001-38129
8-K Open Document | Data Open Filing FORM 8-K Mar 13, 2023 Mar 10, 2023 001-38129
S-8 Open Document Open Filing FORM S-8 Feb 28, 2023 333-270110
10-K Open Document | Data Open Filing 10-K Feb 28, 2023 Dec 31, 2022 001-38129
8-K Open Document | Data Open Filing FORM 8-K Feb 28, 2023 Feb 28, 2023 001-38129
SC 13G Open Document Open Filing SCHEDULE 13G Feb 14, 2023 005-90033
SC 13G/A Open Document Open Filing SC 13G/A Feb 14, 2023 005-90033
SC 13G/A Open Document Open Filing MERSANA THERAPEUTICS, INC. Feb 14, 2023 005-90033
SC 13G/A Open Document Open Filing Feb 14, 2023 005-90033
SC 13G/A Open Document Open Filing SCHEDULE 13G/A Feb 9, 2023 005-90033
SC 13G/A Open Document Open Filing SEC SCHEDULE 13G Feb 6, 2023 005-90033
SC 13G/A Open Document Open Filing Feb 3, 2023 005-90033
8-K Open Document | Data Open Filing FORM 8-K Feb 1, 2023 Feb 1, 2023 001-38129
SC 13G/A Open Document Open Filing Jan 31, 2023 005-90033
8-K Open Document | Data Open Filing FORM 8-K Jan 25, 2023 Jan 25, 2023 001-38129
SC 13G/A Open Document Open Filing Jan 19, 2023 005-90033
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 18, 2023 Jan 13, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 18, 2023 Jan 13, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 18, 2023 Jan 13, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 18, 2023 Jan 13, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 18, 2023 Jan 13, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 18, 2023 Jan 13, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 18, 2023 Jan 13, 2023
8-K Open Document | Data Open Filing FORM 8-K Jan 6, 2023 Jan 6, 2023 001-38129
8-K Open Document | Data Open Filing FORM 8-K Dec 27, 2022 Dec 27, 2022 001-38129
8-K Open Document | Data Open Filing FORM 8-K Dec 22, 2022 Dec 22, 2022 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Dec 16, 2022 Dec 14, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Dec 2, 2022 Nov 30, 2022
8-K Open Document | Data Open Filing FORM 8-K Nov 7, 2022 Nov 7, 2022 001-38129
424B5 Open Document Open Filing 424B5 Nov 7, 2022 333-260895
10-Q Open Document | Data Open Filing 10-Q Nov 7, 2022 Sep 30, 2022 001-38129
8-K Open Document | Data Open Filing FORM 8-K Nov 7, 2022 Nov 7, 2022 001-38129
8-K Open Document | Data Open Filing FORM 8-K Oct 6, 2022 Oct 6, 2022 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Aug 18, 2022 Aug 16, 2022
8-K Open Document | Data Open Filing FORM 8-K Aug 16, 2022 Aug 16, 2022 001-38129
10-Q Open Document | Data Open Filing 10-Q Aug 8, 2022 Jun 30, 2022 001-38129
8-K Open Document | Data Open Filing FORM 8-K Aug 8, 2022 Aug 8, 2022 001-38129
8-K Open Document | Data Open Filing FORM 8-K Aug 8, 2022 Aug 6, 2022 001-38129
4 Open Document Open Filing FORM 4 SUBMISSION Jun 10, 2022 Jun 9, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 10, 2022 Jun 9, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 10, 2022 Jun 9, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 10, 2022 Jun 9, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 10, 2022 Jun 9, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 10, 2022 Jun 9, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 10, 2022 Jun 9, 2022
8-K Open Document | Data Open Filing FORM 8-K Jun 10, 2022 Jun 9, 2022 001-38129
4 Open Document Open Filing FORM 4 SUBMISSION Jun 2, 2022 May 31, 2022
4 Open Document Open Filing FORM 4 SUBMISSION May 26, 2022 May 24, 2022
4 Open Document Open Filing FORM 4 SUBMISSION May 23, 2022 May 19, 2022
4 Open Document Open Filing FORM 4 SUBMISSION May 18, 2022 May 16, 2022
SC 13D/A Open Document Open Filing SC 13D/A May 11, 2022 005-90033
10-Q Open Document | Data Open Filing 10-Q May 9, 2022 Mar 31, 2022 001-38129
8-K Open Document | Data Open Filing FORM 8-K May 9, 2022 May 9, 2022 001-38129
DEFA14A Open Document Open Filing DEFA14A Apr 29, 2022 001-38129
DEF 14A Open Document Open Filing DEF 14A Apr 29, 2022 Jun 9, 2022 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Apr 28, 2022 Apr 26, 2022
PRE 14A Open Document Open Filing PRE 14A Apr 18, 2022 Jun 9, 2022 001-38129
4 Open Document Open Filing FORM 4 SUBMISSION Apr 14, 2022 Apr 13, 2022
SC 13D/A Open Document Open Filing SC 13D/A Apr 14, 2022 005-90033
4 Open Document Open Filing FORM 4 SUBMISSION Apr 13, 2022 Apr 12, 2022
8-K Open Document | Data Open Filing FORM 8-K Feb 28, 2022 Feb 28, 2022 001-38129
424B5 Open Document Open Filing 424B5 Feb 28, 2022 333-260895
S-8 Open Document Open Filing FORM S-8 Feb 28, 2022 333-263085
10-K Open Document | Data Open Filing 10-K Feb 28, 2022 Dec 31, 2021 001-38129
8-K Open Document | Data Open Filing FORM 8-K Feb 28, 2022 Feb 28, 2022 001-38129
SC 13G Open Document Open Filing Feb 17, 2022 005-90033
SC 13G Open Document Open Filing Feb 11, 2022 005-90033
SC 13G Open Document Open Filing SCHEDULE 13G Feb 10, 2022 005-90033
4 Open Document Open Filing FORM 4 SUBMISSION Feb 8, 2022 Feb 7, 2022
SC 13D/A Open Document Open Filing SC 13D/A Feb 8, 2022 005-90033
SC 13G/A Open Document Open Filing SEC SCHEDULE 13G Feb 4, 2022 005-90033
8-K Open Document | Data Open Filing FORM 8-K Feb 3, 2022 Feb 2, 2022 001-38129
SC 13G Open Document Open Filing Jan 27, 2022 005-90033
SC 13G/A Open Document Open Filing Jan 26, 2022 005-90033
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 19, 2022 Jan 14, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 19, 2022 Jan 14, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 19, 2022 Jan 14, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 19, 2022 Jan 14, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 19, 2022 Jan 14, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 19, 2022 Jan 14, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 19, 2022 Jan 14, 2022
4 Open Document Open Filing FORM 4 SUBMISSION Jan 5, 2022 Jan 3, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 5, 2022 Jan 3, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 5, 2022 Jan 3, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 5, 2022 Jan 3, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 5, 2022 Jan 3, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 5, 2022 Jan 3, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 5, 2022 Jan 3, 2022
4 Open Document Open Filing FORM 4 SUBMISSION Jan 4, 2022 Dec 30, 2021
4 Open Document Open Filing FORM 4 SUBMISSION Jan 3, 2022 Dec 29, 2021
SC 13D/A Open Document Open Filing SC 13D/A Jan 3, 2022 005-90033
4 Open Document Open Filing OWNERSHIP DOCUMENT Dec 20, 2021 Dec 20, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Dec 2, 2021 Nov 30, 2021
8-K Open Document | Data Open Filing FORM 8-K Nov 23, 2021 Nov 23, 2021 001-38129
EFFECT Open Document Open Filing Nov 18, 2021 333-260895
CORRESP Open Document Open Filing Nov 16, 2021
UPLOAD Open Document Open Filing Nov 15, 2021
S-3 Open Document Open Filing S-3 Nov 9, 2021 333-260895
10-Q Open Document | Data Open Filing 10-Q Nov 9, 2021 Sep 30, 2021 001-38129
8-K Open Document | Data Open Filing FORM 8-K Nov 9, 2021 Nov 9, 2021 001-38129
8-K Open Document | Data Open Filing FORM 8-K Oct 29, 2021 Oct 29, 2021 001-38129
SC 13G Open Document Open Filing SC 13G Sep 16, 2021 005-90033
8-K Open Document | Data Open Filing FORM 8-K Sep 10, 2021 Sep 10, 2021 001-38129
4 Open Document Open Filing FORM 4 Aug 24, 2021 Aug 20, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Aug 18, 2021 Aug 16, 2021
3 Open Document Open Filing OWNERSHIP DOCUMENT Aug 18, 2021 Aug 16, 2021
8-K Open Document | Data Open Filing FORM 8-K Aug 16, 2021 Aug 16, 2021 001-38129
10-Q Open Document | Data Open Filing 10-Q Aug 6, 2021 Jun 30, 2021 001-38129
8-K Open Document | Data Open Filing FORM 8-K Aug 6, 2021 Aug 6, 2021 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Jul 22, 2021 Jul 20, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jul 19, 2021 Jul 15, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jul 19, 2021 Jul 15, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jul 19, 2021 Jul 15, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jul 9, 2021 Jul 8, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jul 2, 2021 Jul 1, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jul 2, 2021 Jul 1, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 23, 2021 Jun 21, 2021
8-K Open Document | Data Open Filing FORM 8-K Jun 17, 2021 Jun 11, 2021 001-38129
4 Open Document Open Filing FORM 4 SUBMISSION Jun 15, 2021 Jun 11, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 15, 2021 Jun 11, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 15, 2021 Jun 11, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 15, 2021 Jun 11, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 15, 2021 Jun 11, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 15, 2021 Jun 11, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 3, 2021 Jun 1, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT May 24, 2021 May 20, 2021
S-8 Open Document Open Filing FORM S-8 May 10, 2021 333-255975
8-K Open Document | Data Open Filing FORM 8-K May 10, 2021 May 10, 2021 001-38129
10-Q Open Document | Data Open Filing 10-Q May 10, 2021 Mar 31, 2021 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Apr 28, 2021 Apr 26, 2021
3 Open Document Open Filing OWNERSHIP DOCUMENT Apr 28, 2021 Apr 26, 2021
DEFA14A Open Document Open Filing DEFA14A Apr 27, 2021 001-38129
DEF 14A Open Document Open Filing DEF 14A Apr 27, 2021 Jun 11, 2021 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Apr 22, 2021 Apr 20, 2021
8-K Open Document | Data Open Filing FORM 8-K Apr 9, 2021 Apr 5, 2021 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Mar 24, 2021 Mar 22, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Mar 11, 2021 Mar 9, 2021
3 Open Document Open Filing OWNERSHIP DOCUMENT Mar 11, 2021 Mar 9, 2021
8-K Open Document | Data Open Filing FORM 8-K Mar 11, 2021 Mar 11, 2021 001-38129
10-K Open Document | Data Open Filing 10-K Feb 26, 2021 Dec 31, 2020 001-38129
8-K Open Document | Data Open Filing FORM 8-K Feb 26, 2021 Feb 26, 2021 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Feb 24, 2021 Feb 22, 2021
SC 13G/A Open Document Open Filing MERSANA THERAPEUTICS SC 13G/A Feb 12, 2021 005-90033
SC 13G Open Document Open Filing MERSANA THERAPEUTICS, INC. Feb 12, 2021 005-90033
SC 13G/A Open Document Open Filing AMENDMENT NO. 3 TO THE SCHEDULE 13G Feb 11, 2021 005-90033
SC 13G Open Document Open Filing SEC SCHEDULE 13G Feb 4, 2021 005-90033
SC 13G/A Open Document Open Filing Jan 27, 2021 005-90033
SC 13G Open Document Open Filing SCHEDULE 13G Jan 25, 2021 005-90033
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 22, 2021 Jan 20, 2021
4 Open Document Open Filing FORM 4 SUBMISSION Jan 20, 2021 Jan 15, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 20, 2021 Jan 15, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 20, 2021 Jan 15, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 20, 2021 Jan 15, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 20, 2021 Jan 15, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 20, 2021 Jan 15, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 20, 2021 Jan 15, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 20, 2021 Jan 15, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 20, 2021 Jan 15, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 20, 2021 Jan 15, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 20, 2021 Jan 15, 2021
4 Open Document Open Filing FORM 4 SUBMISSION Jan 12, 2021 Jan 8, 2021
SC 13D/A Open Document Open Filing SC 13D/A Jan 12, 2021 005-90033
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 6, 2021 Jan 4, 2021
8-K Open Document | Data Open Filing FORM 8-K Jan 5, 2021 Jan 5, 2021 001-38129
4 Open Document Open Filing OWNERSHIP DOCUMENT Dec 30, 2020 Dec 28, 2020
4 Open Document Open Filing OWNERSHIP DOCUMENT Dec 22, 2020 Dec 21, 2020
4 Open Document Open Filing OWNERSHIP DOCUMENT Dec 15, 2020 Dec 14, 2020
SC 13D/A Open Document Open Filing NEW ENTERPRISE ASSOCIATES 14, L.P. -- MERSANA THERAPEUTICS. 13DA5 Dec 10, 2020 005-90033
4 Open Document Open Filing 4 Dec 3, 2020 Dec 1, 2020
4 Open Document Open Filing 4 Dec 2, 2020 Nov 30, 2020
3 Open Document Open Filing 3 Dec 2, 2020 Nov 30, 2020
8-K Open Document | Data Open Filing FORM 8-K Nov 30, 2020 Nov 30, 2020 001-38129
4 Open Document Open Filing 4 Nov 24, 2020 Nov 20, 2020
SC 13D/A Open Document Open Filing NEW ENTERPRISE ASSOCIATES 14, L.P. -- MERSANA THERAPEUTICS. 13DA4 Nov 19, 2020 005-90033
4 Open Document Open Filing 4 Nov 12, 2020 Sep 14, 2020
10-Q Open Document | Data Open Filing 10-Q Nov 9, 2020 Sep 30, 2020 001-38129
8-K Open Document | Data Open Filing FORM 8-K Nov 9, 2020 Nov 9, 2020 001-38129
4 Open Document Open Filing 4 Oct 22, 2020 Oct 20, 2020
4 Open Document Open Filing 4 Sep 23, 2020 Sep 21, 2020
SC 13D/A Open Document Open Filing NEW ENTERPRISE ASSOCIATES 14, L.P. -- MERSANA THERAPEUTICS. 13DA3 Sep 22, 2020 005-90033
8-K Open Document | Data Open Filing FORM 8-K Sep 17, 2020 Sep 17, 2020 001-38129
4 Open Document Open Filing 4 Sep 16, 2020 Sep 14, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Sep 16, 2020 Sep 14, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Sep 16, 2020 Sep 14, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Sep 16, 2020 Sep 14, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Sep 16, 2020 Sep 14, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Sep 16, 2020 Sep 14, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Sep 16, 2020 Sep 14, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Sep 16, 2020 Sep 14, 2020
8-K Open Document | Data Open Filing FORM 8-K Sep 3, 2020 Aug 28, 2020 001-38129
10-Q Open Document | Data Open Filing 10-Q Aug 7, 2020 Jun 30, 2020 001-38129
8-K Open Document Open Filing FORM 8-K Aug 7, 2020 Aug 7, 2020 001-38129
SC 13G/A Open Document Open Filing Jul 10, 2020 005-90033
4 Open Document Open Filing 4 Jul 6, 2020 Jul 2, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Jun 29, 2020 Jun 25, 2020
4 Open Document Open Filing 4 Jun 29, 2020 Jun 25, 2020
4 Open Document Open Filing 4 Jun 29, 2020 Jun 25, 2020
4 Open Document Open Filing 4 Jun 29, 2020 Jun 25, 2020
4 Open Document Open Filing 4 Jun 29, 2020 Jun 25, 2020
4 Open Document Open Filing 4 Jun 24, 2020 Apr 13, 2020
3 Open Document Open Filing 3 Jun 24, 2020 Apr 13, 2020
8-K Open Document Open Filing FORM 8-K Jun 16, 2020 Jun 12, 2020 001-38129
4 Open Document Open Filing 4 Jun 3, 2020 Jun 1, 2020
8-K Open Document Open Filing FORM 8-K Jun 1, 2020 May 28, 2020 001-38129
424B5 Open Document Open Filing 424B5 May 29, 2020 333-238140
S-3MEF Open Document Open Filing S-3MEF May 28, 2020 333-238761
424B5 Open Document Open Filing 424B5 May 28, 2020 333-238140
8-K Open Document Open Filing FORM 8-K May 27, 2020 May 27, 2020 001-38129
EFFECT Open Document Open Filing May 15, 2020 333-238140
8-K Open Document Open Filing FORM 8-K May 14, 2020 May 14, 2020 001-38129
CORRESP Open Document Open Filing May 13, 2020
UPLOAD Open Document Open Filing May 13, 2020
S-3 Open Document Open Filing S-3 May 8, 2020 333-238140
10-Q Open Document | Data Open Filing 10-Q May 8, 2020 Mar 31, 2020 001-38129
8-K Open Document Open Filing FORM 8-K May 8, 2020 May 8, 2020 001-38129
SC 13D/A Open Document Open Filing NEW ENTERPRISE ASSOCIATES 14, L.P. -- MERSANA THERAPEUTICS. 13DA2 Apr 24, 2020 005-90033
DEFA14A Open Document Open Filing DEFA14A Apr 20, 2020 001-38129
DEF 14A Open Document Open Filing DEF 14A Apr 20, 2020 Jun 12, 2020 001-38129
SC 13D Open Document Open Filing SC 13D Apr 17, 2020 005-90033
8-K Open Document Open Filing FORM 8-K Apr 15, 2020 Apr 13, 2020 001-38129
4 Open Document Open Filing FORM 4 SUBMISSION Apr 14, 2020 Apr 13, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Apr 14, 2020 Apr 13, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Apr 13, 2020 Apr 9, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Apr 13, 2020 Apr 9, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Apr 13, 2020 Apr 9, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Apr 13, 2020 Apr 9, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Apr 13, 2020 Apr 9, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Apr 13, 2020 Apr 9, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Apr 13, 2020 Apr 9, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Apr 13, 2020 Apr 9, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Apr 13, 2020 Aug 28, 2019
4 Open Document Open Filing FORM 4 SUBMISSION Apr 9, 2020 Apr 7, 2020
424B5 Open Document Open Filing 424B5 Apr 9, 2020 333-226055
4 Open Document Open Filing 4 Apr 9, 2020 Apr 7, 2020
8-K Open Document Open Filing FORM 8-K Apr 8, 2020 Apr 7, 2020 001-38129
8-K Open Document Open Filing FORM 8-K Mar 30, 2020 Mar 30, 2020 001-38129
8-K Open Document Open Filing FORM 8-K Mar 20, 2020 Mar 20, 2020 001-38129
CT ORDER Open Document Open Filing Mar 17, 2020 333-218412
8-K Open Document Open Filing FORM 8-K Mar 16, 2020 Mar 11, 2020 001-38129
S-8 Open Document Open Filing FORM S-8 Feb 28, 2020 333-236775
10-K Open Document | Data Open Filing 10-K Feb 28, 2020 Dec 31, 2019 001-38129
8-K Open Document Open Filing FORM 8-K Feb 28, 2020 Feb 28, 2020 001-38129
SC 13G/A Open Document Open Filing SCHEDULE 13G HOLDINGS REPORT AMENDMENT Feb 14, 2020 005-90033
SC 13G/A Open Document Open Filing AMENDMENT NO. 2 TO THE SCHEDULE 13G Feb 14, 2020 005-90033
SC 13G Open Document Open Filing Feb 7, 2020 005-90033
4 Open Document Open Filing 4 Jan 16, 2020 Jan 15, 2020
4 Open Document Open Filing 4 Jan 16, 2020 Jan 15, 2020
4 Open Document Open Filing 4 Jan 16, 2020 Jan 15, 2020
4 Open Document Open Filing 4 Jan 16, 2020 Jan 15, 2020
4 Open Document Open Filing 4 Jan 16, 2020 Jan 15, 2020
4 Open Document Open Filing 4 Jan 16, 2020 Jan 15, 2020
4 Open Document Open Filing 4 Jan 16, 2020 Jan 15, 2020
8-K Open Document Open Filing FORM 8-K Jan 10, 2020 Jan 10, 2020 001-38129
4 Open Document Open Filing FORM 4 SUBMISSION Jan 3, 2020 Jan 2, 2020
4 Open Document Open Filing 4 Jan 3, 2020 Jan 2, 2020
4 Open Document Open Filing 4 Jan 3, 2020 Jan 2, 2020
4 Open Document Open Filing 4 Jan 3, 2020 Jan 2, 2020
SC 13G Open Document Open Filing SC 13G Dec 23, 2019 005-90033
8-K Open Document Open Filing FORM 8-K Nov 27, 2019 Nov 26, 2019 001-38129
10-Q Open Document | Data Open Filing 10-Q Nov 6, 2019 Sep 30, 2019 001-38129
8-K Open Document Open Filing 8-K Nov 6, 2019 Nov 6, 2019 001-38129
SC 13G/A Open Document Open Filing AMENDMENT NO. 1 TO SCHEDULE 13G Oct 9, 2019 005-90033
8-K Open Document Open Filing 8-K Aug 21, 2019 Aug 20, 2019 001-38129
10-Q Open Document | Data Open Filing 10-Q Aug 8, 2019 Jun 30, 2019 001-38129
8-K Open Document Open Filing 8-K Aug 8, 2019 Aug 8, 2019 001-38129
8-K Open Document Open Filing 8-K Jul 26, 2019 Jul 26, 2019 001-38129
4 Open Document Open Filing 4 Jul 19, 2019 Jul 17, 2019
4 Open Document Open Filing 4 Jul 19, 2019 Jul 17, 2019
4 Open Document Open Filing 4 Jul 19, 2019 Jul 17, 2019
4 Open Document Open Filing 4 Jul 19, 2019 Jul 17, 2019
4 Open Document Open Filing 4 Jul 19, 2019 Jul 17, 2019
4 Open Document Open Filing 4 Jul 12, 2019 Jul 10, 2019
3 Open Document Open Filing 3 Jul 12, 2019 Jul 10, 2019
8-K Open Document Open Filing 8-K Jun 12, 2019 Jun 7, 2019 001-38129
4 Open Document Open Filing FORM 4 SUBMISSION Jun 11, 2019 Jun 7, 2019
4 Open Document Open Filing 4 Jun 11, 2019 Jun 7, 2019
4 Open Document Open Filing 4 Jun 11, 2019 Jun 7, 2019
4 Open Document Open Filing 4 Jun 11, 2019 Jun 7, 2019
4 Open Document Open Filing 4 Jun 11, 2019 Jun 7, 2019
8-K Open Document Open Filing 8-K Jun 7, 2019 Jun 7, 2019 001-38129
8-K Open Document Open Filing 8-K Jun 5, 2019 Jun 1, 2019 001-38129
10-Q Open Document | Data Open Filing 10-Q May 9, 2019 Mar 31, 2019 001-38129
8-K Open Document Open Filing 8-K May 9, 2019 May 9, 2019 001-38129
DEFA14A Open Document Open Filing DEFA14A Apr 23, 2019 001-38129
DEF 14A Open Document Open Filing DEF 14A Apr 23, 2019 Jun 7, 2019 001-38129
8-K Open Document Open Filing 8-K Apr 8, 2019 Apr 8, 2019 001-38129
SC 13D/A Open Document Open Filing NEW ENTERPRISE ASSOCIATES 14, L.P. - MERSANA THERAPEUTICS 13D/A(#1) Mar 14, 2019 005-90033
SC 13G Open Document Open Filing THE SCHEDULE 13G Mar 11, 2019 005-90033
SC 13G Open Document Open Filing SCHEDULE 13G Mar 11, 2019 005-90033
S-8 Open Document Open Filing S-8 Mar 8, 2019 333-230159
10-K Open Document | Data Open Filing 10-K Mar 8, 2019 Dec 31, 2018 001-38129
8-K Open Document Open Filing 8-K Mar 8, 2019 Mar 8, 2019 001-38129
4 Open Document Open Filing FORM 4 SUBMISSION Mar 6, 2019 Mar 5, 2019
4 Open Document Open Filing FORM 4 SUBMISSION Mar 6, 2019 Mar 5, 2019
424B5 Open Document Open Filing 424B5 Mar 4, 2019 333-226055
8-K Open Document Open Filing 8-K Mar 4, 2019 Feb 28, 2019 001-38129
424B5 Open Document Open Filing 424B5 Feb 28, 2019 333-226055
8-K Open Document Open Filing 8-K Feb 28, 2019 Feb 28, 2019 001-38129
SC 13G/A Open Document Open Filing SCHEDULE 13G HOLDINGS REPORT AMENDMENT Feb 14, 2019 005-90033
SC 13G Open Document Open Filing Feb 14, 2019 005-90033
4 Open Document Open Filing 4 Jan 25, 2019 Jan 23, 2019
4 Open Document Open Filing 4 Jan 25, 2019 Jan 23, 2019
4 Open Document Open Filing 4 Jan 25, 2019 Jan 23, 2019
4 Open Document Open Filing 4 Jan 25, 2019 Jan 23, 2019
4 Open Document Open Filing 4 Jan 25, 2019 Jan 23, 2019
4 Open Document Open Filing 4 Jan 25, 2019 Jan 23, 2019
SC 13G/A Open Document Open Filing SEC SCHEDULE 13G Jan 10, 2019 005-90033
4 Open Document Open Filing FORM 4 SUBMISSION Jan 4, 2019 Jan 2, 2019
4 Open Document Open Filing 4 Jan 4, 2019 Jan 2, 2019
4 Open Document Open Filing 4 Jan 4, 2019 Jan 2, 2019
8-K Open Document Open Filing 8-K Jan 4, 2019 Jan 4, 2019 001-38129
8-K Open Document Open Filing 8-K Jan 4, 2019 Jan 2, 2019 001-38129
4 Open Document Open Filing 4 Dec 3, 2018 Nov 30, 2018
3 Open Document Open Filing 3 Dec 3, 2018 Nov 30, 2018
10-Q Open Document | Data Open Filing 10-Q Nov 13, 2018 Sep 30, 2018 001-38129
8-K Open Document Open Filing 8-K Nov 13, 2018 Nov 13, 2018 001-38129
4 Open Document Open Filing 4 Sep 25, 2018 Sep 24, 2018
4 Open Document Open Filing FORM 4 SUBMISSION Sep 21, 2018 Sep 20, 2018
4 Open Document Open Filing 4 Sep 21, 2018 Sep 20, 2018
4 Open Document Open Filing 4 Sep 21, 2018 Sep 20, 2018
4 Open Document Open Filing 4 Sep 21, 2018 Sep 20, 2018
EFFECT Open Document Open Filing Sep 17, 2018 333-226055
8-K Open Document Open Filing 8-K Sep 17, 2018 Sep 17, 2018 001-38129
S-3/A Open Document Open Filing S-3/A Sep 14, 2018 333-226055
CORRESP Open Document Open Filing Sep 12, 2018
4 Open Document Open Filing 4 Aug 29, 2018 Aug 27, 2018
10-Q Open Document | Data Open Filing 10-Q Aug 14, 2018 Jun 30, 2018 001-38129
8-K Open Document Open Filing 8-K Aug 14, 2018 Aug 14, 2018 001-38129
4 Open Document Open Filing 4 Jul 25, 2018 Jul 23, 2018
8-K Open Document Open Filing 8-K Jul 23, 2018 Jul 19, 2018 001-38129
CORRESP Open Document Open Filing Jul 16, 2018
CORRESP Open Document Open Filing Jul 12, 2018
CORRESP Open Document Open Filing Jul 12, 2018
S-3/A Open Document Open Filing S-3/A Jul 12, 2018 333-226055
UPLOAD Open Document Open Filing Jul 11, 2018
4 Open Document Open Filing 4 Jul 5, 2018 Jul 3, 2018
S-3 Open Document Open Filing S-3 Jul 2, 2018 333-226055
8-K Open Document Open Filing 8-K Jun 29, 2018 Jun 27, 2018 001-38129
DEFA14A Open Document Open Filing DEFA14A Jun 11, 2018 001-38129
10-Q Open Document | Data Open Filing 10-Q May 15, 2018 Mar 31, 2018 001-38129
8-K Open Document Open Filing 8-K May 14, 2018 May 14, 2018 001-38129
DEF 14A Open Document Open Filing DEF 14A Apr 30, 2018 Jun 27, 2018 001-38129
8-K Open Document Open Filing 8-K Apr 10, 2018 Apr 9, 2018 001-38129
10-K Open Document | Data Open Filing 10-K Mar 28, 2018 Dec 31, 2017 001-38129
8-K Open Document Open Filing 8-K Mar 28, 2018 Mar 28, 2018 001-38129
4 Open Document Open Filing 4 Mar 21, 2018 Mar 19, 2018
3 Open Document Open Filing 3 Mar 21, 2018 Mar 19, 2018
8-K Open Document Open Filing 8-K Mar 19, 2018 Mar 19, 2018 001-38129
4 Open Document Open Filing 4 Mar 14, 2018 Mar 12, 2018
3 Open Document Open Filing 3 Mar 14, 2018 Mar 12, 2018
8-K Open Document Open Filing 8-K Mar 12, 2018 Mar 12, 2018 001-38129
8-K Open Document Open Filing 8-K Mar 2, 2018 Feb 26, 2018 001-38129
4 Open Document Open Filing 4 Feb 23, 2018 Feb 21, 2018
SC 13G/A Open Document Open Filing 13G/A Feb 14, 2018 005-90033
SC 13G/A Open Document Open Filing SCHEDULE 13G AMENDMENT 1 Feb 13, 2018 005-90033
SC 13G/A Open Document Open Filing Feb 13, 2018 005-90033
SC 13G Open Document Open Filing Feb 9, 2018 005-90033
SC 13G/A Open Document Open Filing SEC SCHEDULE 13G Feb 8, 2018 005-90033
4 Open Document Open Filing 4 Feb 6, 2018 Feb 2, 2018
4 Open Document Open Filing 4 Feb 6, 2018 Feb 2, 2018
4 Open Document Open Filing 4 Feb 6, 2018 Feb 2, 2018
4 Open Document Open Filing 4 Feb 6, 2018 Feb 2, 2018
4 Open Document Open Filing 4 Feb 6, 2018 Feb 2, 2018
4 Open Document Open Filing 4 Feb 6, 2018 Feb 2, 2018
S-8 Open Document Open Filing S-8 Feb 2, 2018 333-222845
4 Open Document Open Filing 4 Feb 1, 2018 Jan 30, 2018
4 Open Document Open Filing FORM 4 SUBMISSION Jan 4, 2018 Jan 2, 2018
4 Open Document Open Filing FORM 4 SUBMISSION Jan 4, 2018 Jan 2, 2018
4 Open Document Open Filing 4 Jan 4, 2018 Jan 2, 2018
4 Open Document Open Filing 4 Jan 4, 2018 Jan 2, 2018
4 Open Document Open Filing 4 Dec 21, 2017 Dec 20, 2017
10-Q Open Document | Data Open Filing 10-Q Nov 13, 2017 Sep 30, 2017 001-38129
8-K Open Document Open Filing 8-K Nov 9, 2017 Nov 9, 2017 001-38129
4 Open Document Open Filing 4 Sep 7, 2017 Sep 5, 2017
3 Open Document Open Filing 3 Sep 7, 2017 Sep 5, 2017
8-K Open Document Open Filing 8-K Sep 6, 2017 Sep 5, 2017 001-38129
10-Q Open Document | Data Open Filing 10-Q Aug 11, 2017 Jun 30, 2017 001-38129
8-K Open Document Open Filing 8-K Aug 11, 2017 Aug 11, 2017 001-38129
SC 13G Open Document Open Filing SEC SCHEDULE 13G Aug 10, 2017 005-90033
S-8 Open Document Open Filing S-8 Jul 21, 2017 333-219388
SC 13G Open Document Open Filing SCHEDULE 13G Jul 13, 2017 005-90033
SC 13D Open Document Open Filing MERSANA THERAPEUTICS, INC. - SCHEDULE 13D Jul 11, 2017 005-90033
8-K Open Document Open Filing 8-K Jul 10, 2017 Jul 3, 2017 001-38129
SC 13G Open Document Open Filing 13G Jul 7, 2017 005-90033
4 Open Document Open Filing FORM 4 SUBMISSION Jul 6, 2017 Jul 3, 2017
4 Open Document Open Filing FORM 4 SUBMISSION Jul 6, 2017 Jul 3, 2017
4 Open Document Open Filing FORM 4 SUBMISSION Jul 6, 2017 Jul 3, 2017
4 Open Document Open Filing FORM 4 SUBMISSION Jul 6, 2017 Jul 3, 2017
4 Open Document Open Filing 4 Jul 6, 2017 Jul 3, 2017
4 Open Document Open Filing FORM 4 SUBMISSION Jul 6, 2017 Jul 3, 2017
4 Open Document Open Filing FORM 4 SUBMISSION Jul 6, 2017 Jul 3, 2017
4 Open Document Open Filing FORM 4 SUBMISSION Jul 6, 2017 Jul 3, 2017
4 Open Document Open Filing FORM 4 SUBMISSION Jul 6, 2017 Jul 3, 2017
4 Open Document Open Filing FORM 4 SUBMISSION Jul 6, 2017 Jul 3, 2017
4 Open Document Open Filing FORM 4 SUBMISSION Jul 6, 2017 Jul 3, 2017
SC 13G Open Document Open Filing Jul 6, 2017 005-90033
4 Open Document Open Filing PRIMARY DOCUMENT Jul 6, 2017 Jul 3, 2017
424B4 Open Document Open Filing 424B4 Jun 29, 2017 333-218412
CT ORDER Open Document Open Filing Jun 29, 2017 333-218412
EFFECT Open Document Open Filing Jun 27, 2017 333-218412
3/A Open Document Open Filing FORM 3/A SUBMISSION Jun 27, 2017 Jun 27, 2017
3 Open Document Open Filing PRIMARY DOCUMENT Jun 27, 2017 Jun 27, 2017
3 Open Document Open Filing FORM 3 SUBMISSION Jun 27, 2017 Jun 27, 2017
3 Open Document Open Filing FORM 3 SUBMISSION Jun 27, 2017 Jun 27, 2017
3 Open Document Open Filing FORM 3 SUBMISSION Jun 27, 2017 Jun 27, 2017
3 Open Document Open Filing FORM 3 SUBMISSION Jun 27, 2017 Jun 27, 2017
3 Open Document Open Filing FORM 3 SUBMISSION Jun 27, 2017 Jun 27, 2017
3 Open Document Open Filing FORM 3 SUBMISSION Jun 27, 2017 Jun 27, 2017
3 Open Document Open Filing FORM 3 SUBMISSION Jun 27, 2017 Jun 27, 2017
3 Open Document Open Filing FORM 3 SUBMISSION Jun 27, 2017 Jun 27, 2017
3 Open Document Open Filing FORM 3 SUBMISSION Jun 27, 2017 Jun 27, 2017
3 Open Document Open Filing FORM 3 SUBMISSION Jun 27, 2017 Jun 27, 2017
3 Open Document Open Filing FORM 3 SUBMISSION Jun 27, 2017 Jun 27, 2017
3 Open Document Open Filing 3 Jun 27, 2017 Jun 27, 2017
3 Open Document Open Filing 3 Jun 27, 2017 Jun 27, 2017
3 Open Document Open Filing 3 Jun 27, 2017 Jun 27, 2017
3 Open Document Open Filing 3 Jun 27, 2017 Jun 27, 2017
3 Open Document Open Filing 3 Jun 27, 2017 Jun 27, 2017
3 Open Document Open Filing 3 Jun 27, 2017 Jun 27, 2017
3 Open Document Open Filing 3 Jun 27, 2017 Jun 27, 2017
3 Open Document Open Filing 3 Jun 27, 2017 Jun 27, 2017
3 Open Document Open Filing 3 Jun 27, 2017 Jun 27, 2017
CERTNAS Open Document Open Filing AUTO-GENERATED PAPER DOCUMENT Jun 26, 2017 001-38129
CORRESP Open Document Open Filing Jun 23, 2017
CORRESP Open Document Open Filing Jun 23, 2017
8-A12B Open Document Open Filing 8-A12B Jun 23, 2017 001-38129
S-1/A Open Document Open Filing S-1/A Jun 16, 2017 333-218412
CORRESP Open Document Open Filing Jun 14, 2017
UPLOAD Open Document Open Filing Jun 7, 2017
CORRESP Open Document Open Filing Jun 2, 2017
CORRESP Open Document Open Filing Jun 1, 2017
S-1 Open Document Open Filing S-1 Jun 1, 2017 333-218412
UPLOAD Open Document Open Filing May 25, 2017
DRSLTR Open Document Open Filing May 12, 2017
DRS/A Open Document Open Filing May 12, 2017 377-01519
UPLOAD Open Document Open Filing May 8, 2017
DRSLTR Open Document Open Filing Apr 21, 2017
DRS/A Open Document Open Filing Apr 21, 2017 377-01519
UPLOAD Open Document Open Filing Apr 17, 2017
DRSLTR Open Document Open Filing Mar 17, 2017
DRS Open Document Open Filing Mar 17, 2017 377-01519
D Open Document Open Filing Jun 24, 2016 021-265754
D/A Open Document Open Filing Mar 1, 2016 021-235062
D Open Document Open Filing Mar 3, 2015 021-235062
D/A Open Document Open Filing Apr 8, 2014 021-204292