Mersana Therapeutics, Inc. SEC EDGAR Filings (CIK 0001442836)

SEC EDGAR filings, ownership reports, and insider transactions for Mersana Therapeutics, Inc..

Symbol
MRSN on Nasdaq
Industry
Pharmaceutical Preparations (Office Of Life Sciences)
Business address
840 Memorial Drive, Cambridge, MA, 02139
State of incorporation
DE
Fiscal year end
31 December
⭐ Add to watchlist ⭐
Get insider transactions for this issuer
Mersana Therapeutics, Inc. has filed 700 SEC EDGAR filings since 12 Aug 2008

Latest Filings

Recent SEC filings for Mersana Therapeutics, Inc. including 15-12G, SCHEDULE 13G/A, EFFECT and more.

Form type Document Filing Description Filing date Reporting date File number(s)
15-12G Open 15-12G document View SEC filing for 15-12G 15-12G 16 Jan 2026 001-38129
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 09 Jan 2026 005-90033
EFFECT Open EFFECT document View SEC filing for EFFECT 08 Jan 2026 333-271766
SCHEDULE 13D/A Open SCHEDULE 13D/A document View SEC filing for SCHEDULE 13D/A 08 Jan 2026 005-90033
4 Open 4 document View SEC filing for 4 4 06 Jan 2026 06 Jan 2026
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 06 Jan 2026 06 Jan 2026
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 06 Jan 2026 06 Jan 2026
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 06 Jan 2026 06 Jan 2026
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 06 Jan 2026 06 Jan 2026
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 06 Jan 2026 06 Jan 2026
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 06 Jan 2026 06 Jan 2026
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 06 Jan 2026 06 Jan 2026
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 06 Jan 2026 06 Jan 2026
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 06 Jan 2026 06 Jan 2026
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 06 Jan 2026 06 Jan 2026
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 06 Jan 2026 06 Jan 2026
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 06 Jan 2026 06 Jan 2026
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 06 Jan 2026 333-284273
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 06 Jan 2026 333-276492
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 06 Jan 2026 333-270110
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 06 Jan 2026 333-263085
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 06 Jan 2026 333-255975
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 06 Jan 2026 333-236775
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 06 Jan 2026 333-230159
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 06 Jan 2026 333-222845
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 06 Jan 2026 333-219388
POS AM Open POS AM document View SEC filing for POS AM POS AM 06 Jan 2026 333-271766
25-NSE Open 25-NSE document View SEC filing for 25-NSE 06 Jan 2026 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 06 Jan 2026 05 Jan 2026 001-38129
SC 14D9/A Open SC 14D9/A document View SEC filing for SC 14D9/A SC 14D9/A 06 Jan 2026 005-90033
SC TO-T/A Open SC TO-T/A document View SEC filing for SC TO-T/A SC TO-T/A 06 Jan 2026 005-90033
SC 14D9/A Open SC 14D9/A document View SEC filing for SC 14D9/A SC 14D9/A 29 Dec 2025 005-90033
SC TO-T/A Open SC TO-T/A document View SEC filing for SC TO-T/A SC TO-T/A 29 Dec 2025 005-90033
SC 14D9 Open SC 14D9 document View SEC filing for SC 14D9 SC 14D9 05 Dec 2025 005-90033
SC TO-T Open SC TO-T document | Open XBRL data View SEC filing for SC TO-T SC TO-T 05 Dec 2025 005-90033
SC TO-C Open SC TO-C document View SEC filing for SC TO-C SC TO-C 04 Dec 2025 005-90033
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 24 Nov 2025 005-90033
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 14 Nov 2025 005-90033
SC TO-C Open SC TO-C document View SEC filing for SC TO-C SC TO-C 14 Nov 2025 005-90033
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 14 Nov 2025 30 Sep 2025 001-38129
SC14D9C Open SC14D9C document View SEC filing for SC14D9C SC14D9C 14 Nov 2025 005-90033
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 14 Nov 2025 14 Nov 2025 001-38129
SCHEDULE 13D/A Open SCHEDULE 13D/A document View SEC filing for SCHEDULE 13D/A 13 Nov 2025 005-90033
SC TO-C Open SC TO-C document View SEC filing for SC TO-C SC TO-C 13 Nov 2025 005-90033
SC14D9C Open SC14D9C document View SEC filing for SC14D9C SC14D9C 13 Nov 2025 005-90033
SC TO-C Open SC TO-C document View SEC filing for SC TO-C SC TO-C 13 Nov 2025 005-90033
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 13 Nov 2025 12 Nov 2025 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 28 Oct 2025 25 Oct 2025
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 15 Sep 2025 11 Sep 2025
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 05 Sep 2025 05 Sep 2025 001-38129
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 14 Aug 2025 005-90033
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 13 Aug 2025 30 Jun 2025 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 13 Aug 2025 13 Aug 2025 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 24 Jul 2025 24 Jul 2025 001-38129
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 17 Jul 2025 005-90033
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 03 Jul 2025 01 Jul 2025 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 13 Jun 2025 12 Jun 2025
4 Open 4 document View SEC filing for 4 4 13 Jun 2025 12 Jun 2025
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 13 Jun 2025 12 Jun 2025
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 13 Jun 2025 12 Jun 2025
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 13 Jun 2025 12 Jun 2025
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 13 Jun 2025 12 Jun 2025
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 13 Jun 2025 12 Jun 2025
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 13 Jun 2025 12 Jun 2025 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 02 Jun 2025 02 Jun 2025 001-38129
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 15 May 2025 005-90033
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 15 May 2025 005-90033
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 15 May 2025 005-90033
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 15 May 2025 31 Mar 2025 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 15 May 2025 15 May 2025 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 06 May 2025 05 May 2025 001-38129
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 30 Apr 2025 005-90033
ARS Open ARS document View SEC filing for ARS ARS 29 Apr 2025 31 Dec 2024 001-38129
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 29 Apr 2025 001-38129
DEF 14A Open DEF 14A document | Open XBRL data View SEC filing for DEF 14A DEF 14A 29 Apr 2025 12 Jun 2025 001-38129
PRE 14A Open PRE 14A document | Open XBRL data View SEC filing for PRE 14A PRE 14A 18 Apr 2025 12 Jun 2025 001-38129
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 17 Apr 2025 005-90033
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 03 Mar 2025 31 Dec 2024 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 03 Mar 2025 03 Mar 2025 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 28 Feb 2025 25 Feb 2025 001-38129
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 14 Feb 2025 005-90033
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 05 Feb 2025 005-90033
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 05 Feb 2025 05 Feb 2025 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 17 Jan 2025 15 Jan 2025
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 17 Jan 2025 15 Jan 2025
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 17 Jan 2025 15 Jan 2025
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 17 Jan 2025 15 Jan 2025
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 17 Jan 2025 15 Jan 2025
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 17 Jan 2025 15 Jan 2025
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 17 Jan 2025 15 Jan 2025
144 Open 144 document View SEC filing for 144 17 Jan 2025 001-38129
144 Open 144 document View SEC filing for 144 17 Jan 2025 001-38129
144 Open 144 document View SEC filing for 144 17 Jan 2025 001-38129
144 Open 144 document View SEC filing for 144 17 Jan 2025 001-38129
144 Open 144 document View SEC filing for 144 17 Jan 2025 001-38129
144 Open 144 document View SEC filing for 144 17 Jan 2025 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 16 Jan 2025 14 Jan 2025
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 16 Jan 2025 14 Jan 2025
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 16 Jan 2025 14 Jan 2025
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 16 Jan 2025 14 Jan 2025
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 16 Jan 2025 14 Jan 2025
144 Open 144 document View SEC filing for 144 16 Jan 2025 001-38129
144 Open 144 document View SEC filing for 144 16 Jan 2025 001-38129
144 Open 144 document View SEC filing for 144 16 Jan 2025 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 15 Jan 2025 13 Jan 2025
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 15 Jan 2025 13 Jan 2025
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 15 Jan 2025 13 Jan 2025
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 15 Jan 2025 13 Jan 2025
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 15 Jan 2025 13 Jan 2025
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 15 Jan 2025 13 Jan 2025
144 Open 144 document View SEC filing for 144 15 Jan 2025 001-38129
S-8 Open S-8 document View SEC filing for S-8 FORM S-8 14 Jan 2025 333-284273
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 10 Jan 2025 10 Jan 2025 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 10 Jan 2025 10 Jan 2025 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 03 Jan 2025 02 Jan 2025
3 Open 3 document View SEC filing for 3 30 Dec 2024 20 Dec 2024
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 26 Dec 2024 005-90033
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 23 Dec 2024 005-90033
4 Open 4 document View SEC filing for 4 23 Dec 2024 19 Dec 2024
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 19 Dec 2024 19 Dec 2024 001-38129
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A SC 13D/A 15 Nov 2024 005-90033
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 14 Nov 2024 005-90033
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 14 Nov 2024 005-90033
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 13 Nov 2024 30 Sep 2024 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 13 Nov 2024 13 Nov 2024 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 29 Oct 2024 25 Oct 2024
144 Open 144 document View SEC filing for 144 29 Oct 2024 001-38129
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 15 Oct 2024 005-90033
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 07 Oct 2024 01 Oct 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 07 Oct 2024 01 Oct 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 07 Oct 2024 01 Oct 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 07 Oct 2024 01 Oct 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 07 Oct 2024 01 Oct 2024
144 Open 144 document View SEC filing for 144 07 Oct 2024 001-38129
144 Open 144 document View SEC filing for 144 07 Oct 2024 001-38129
144 Open 144 document View SEC filing for 144 07 Oct 2024 001-38129
144 Open 144 document View SEC filing for 144 07 Oct 2024 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 03 Oct 2024 01 Oct 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 13 Sep 2024 11 Sep 2024
144 Open 144 document View SEC filing for 144 13 Sep 2024 001-38129
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 13 Aug 2024 30 Jun 2024 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 13 Aug 2024 13 Aug 2024 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 02 Jul 2024 01 Jul 2024
4 Open 4 document View SEC filing for 4 4 12 Jun 2024 11 Jun 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Jun 2024 11 Jun 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Jun 2024 11 Jun 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Jun 2024 11 Jun 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Jun 2024 11 Jun 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Jun 2024 11 Jun 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Jun 2024 11 Jun 2024
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 11 Jun 2024 11 Jun 2024 001-38129
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 17 May 2024 005-90033
EFFECT Open EFFECT document View SEC filing for EFFECT 09 May 2024 333-271766
424B5 Open 424B5 document View SEC filing for 424B5 424B5 09 May 2024 333-271766
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 09 May 2024 31 Mar 2024 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 09 May 2024 09 May 2024 001-38129
ARS Open ARS document View SEC filing for ARS ARS 26 Apr 2024 31 Dec 2023 001-38129
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 26 Apr 2024 001-38129
DEF 14A Open DEF 14A document View SEC filing for DEF 14A SCHEDULE 14A 26 Apr 2024 11 Jun 2024 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 03 Apr 2024 01 Apr 2024
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 28 Feb 2024 28 Feb 2024 001-38129
424B5 Open 424B5 document View SEC filing for 424B5 424B5 28 Feb 2024 333-271766
POS AM Open POS AM document View SEC filing for POS AM POS AM 28 Feb 2024 333-271766
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 28 Feb 2024 31 Dec 2023 001-38129
POSASR Open POSASR document View SEC filing for POSASR POSASR 28 Feb 2024 333-271766
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 28 Feb 2024 28 Feb 2024 001-38129
4/A Open 4/A document View SEC filing for 4/A OWNERSHIP DOCUMENT 16 Feb 2024 13 Jan 2024
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 14 Feb 2024 005-90033
SC 13G Open SC 13G document View SEC filing for SC 13G SCHEDULE FILED TO REPORT ACQUISITION OF BENEFICIAL OWNERSHIP 14 Feb 2024 005-90033
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 1 14 Feb 2024 005-90033
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MERSANA THERAPEUTICS, INC. 14 Feb 2024 005-90033
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 14 Feb 2024 005-90033
SC 13G Open SC 13G document View SEC filing for SC 13G SCHEDULE 13G 13 Feb 2024 005-90033
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 29 Jan 2024 005-90033
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 22 Jan 2024 005-90033
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 17 Jan 2024 13 Jan 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 17 Jan 2024 13 Jan 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 17 Jan 2024 13 Jan 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 17 Jan 2024 13 Jan 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 17 Jan 2024 15 Jan 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 17 Jan 2024 13 Jan 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 17 Jan 2024 13 Jan 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 17 Jan 2024 13 Jan 2024
144 Open 144 document View SEC filing for 144 16 Jan 2024 001-38129
144 Open 144 document View SEC filing for 144 16 Jan 2024 001-38129
144 Open 144 document View SEC filing for 144 16 Jan 2024 001-38129
144 Open 144 document View SEC filing for 144 16 Jan 2024 001-38129
S-8 Open S-8 document View SEC filing for S-8 FORM S-8 12 Jan 2024 333-276492
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 05 Jan 2024 05 Jan 2024 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 04 Jan 2024 02 Jan 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 04 Jan 2024 02 Jan 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 04 Jan 2024 02 Jan 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 04 Jan 2024 02 Jan 2024
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 21 Dec 2023 15 Dec 2023 001-38129
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 07 Nov 2023 30 Sep 2023 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 07 Nov 2023 07 Nov 2023 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 31 Oct 2023 31 Oct 2023 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 27 Oct 2023 25 Oct 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 04 Oct 2023 02 Oct 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 04 Oct 2023 02 Oct 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 04 Oct 2023 02 Oct 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 04 Oct 2023 02 Oct 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 04 Oct 2023 02 Oct 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 13 Sep 2023 11 Sep 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 13 Sep 2023 11 Sep 2023
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 12 Sep 2023 12 Sep 2023 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 07 Sep 2023 05 Sep 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 07 Sep 2023 05 Sep 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 07 Sep 2023 05 Sep 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 07 Sep 2023 05 Sep 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 07 Sep 2023 05 Sep 2023
3 Open 3 document View SEC filing for 3 OWNERSHIP DOCUMENT 07 Sep 2023 05 Sep 2023
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 06 Sep 2023 01 Sep 2023 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 18 Aug 2023 16 Aug 2023
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 08 Aug 2023 30 Jun 2023 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 08 Aug 2023 08 Aug 2023 001-38129
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 07 Aug 2023 005-90033
3 Open 3 document View SEC filing for 3 31 Jul 2023 27 Jul 2023
SC 13G Open SC 13G document View SEC filing for SC 13G 27 Jul 2023 005-90033
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 27 Jul 2023 26 Jul 2023 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 06 Jul 2023 03 Jul 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 06 Jul 2023 03 Jul 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 06 Jul 2023 03 Jul 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 06 Jul 2023 03 Jul 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 06 Jul 2023 03 Jul 2023
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 15 Jun 2023 15 Jun 2023 001-38129
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 12 Jun 2023 08 Jun 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Jun 2023 08 Jun 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Jun 2023 08 Jun 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Jun 2023 08 Jun 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Jun 2023 08 Jun 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Jun 2023 08 Jun 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Jun 2023 08 Jun 2023
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 09 Jun 2023 08 Jun 2023 001-38129
S-3ASR Open S-3ASR document View SEC filing for S-3ASR S-3ASR 09 May 2023 333-271766
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 09 May 2023 31 Mar 2023 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 09 May 2023 09 May 2023 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 28 Apr 2023 26 Apr 2023
ARS Open ARS document View SEC filing for ARS ARS 28 Apr 2023 31 Dec 2022 001-38129
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 28 Apr 2023 001-38129
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 28 Apr 2023 08 Jun 2023 001-38129
PRE 14A Open PRE 14A document View SEC filing for PRE 14A PRE 14A 14 Apr 2023 08 Jun 2023 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 05 Apr 2023 03 Apr 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 05 Apr 2023 03 Apr 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 05 Apr 2023 03 Apr 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 05 Apr 2023 03 Apr 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 05 Apr 2023 03 Apr 2023
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 31 Mar 2023 31 Mar 2023 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 24 Mar 2023 23 Mar 2023 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 13 Mar 2023 10 Mar 2023 001-38129
S-8 Open S-8 document View SEC filing for S-8 FORM S-8 28 Feb 2023 333-270110
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 28 Feb 2023 31 Dec 2022 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 28 Feb 2023 28 Feb 2023 001-38129
SC 13G Open SC 13G document View SEC filing for SC 13G SCHEDULE 13G 14 Feb 2023 005-90033
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 14 Feb 2023 005-90033
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MERSANA THERAPEUTICS, INC. 14 Feb 2023 005-90033
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2023 005-90033
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SCHEDULE 13G/A 09 Feb 2023 005-90033
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SEC SCHEDULE 13G 06 Feb 2023 005-90033
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 03 Feb 2023 005-90033
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 01 Feb 2023 01 Feb 2023 001-38129
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 31 Jan 2023 005-90033
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 25 Jan 2023 25 Jan 2023 001-38129
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 19 Jan 2023 005-90033
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 18 Jan 2023 13 Jan 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 18 Jan 2023 13 Jan 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 18 Jan 2023 13 Jan 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 18 Jan 2023 13 Jan 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 18 Jan 2023 13 Jan 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 18 Jan 2023 13 Jan 2023
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 18 Jan 2023 13 Jan 2023
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 06 Jan 2023 06 Jan 2023 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 27 Dec 2022 27 Dec 2022 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 22 Dec 2022 22 Dec 2022 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 16 Dec 2022 14 Dec 2022
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 02 Dec 2022 30 Nov 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 07 Nov 2022 07 Nov 2022 001-38129
424B5 Open 424B5 document View SEC filing for 424B5 424B5 07 Nov 2022 333-260895
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 07 Nov 2022 30 Sep 2022 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 07 Nov 2022 07 Nov 2022 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 06 Oct 2022 06 Oct 2022 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 18 Aug 2022 16 Aug 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 16 Aug 2022 16 Aug 2022 001-38129
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 08 Aug 2022 30 Jun 2022 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 08 Aug 2022 08 Aug 2022 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 08 Aug 2022 06 Aug 2022 001-38129
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 10 Jun 2022 09 Jun 2022
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 10 Jun 2022 09 Jun 2022
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 10 Jun 2022 09 Jun 2022
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 10 Jun 2022 09 Jun 2022
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 10 Jun 2022 09 Jun 2022
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 10 Jun 2022 09 Jun 2022
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 10 Jun 2022 09 Jun 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 10 Jun 2022 09 Jun 2022 001-38129
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 02 Jun 2022 31 May 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 26 May 2022 24 May 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 23 May 2022 19 May 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 May 2022 16 May 2022
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A SC 13D/A 11 May 2022 005-90033
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 09 May 2022 31 Mar 2022 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 09 May 2022 09 May 2022 001-38129
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 29 Apr 2022 001-38129
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 29 Apr 2022 09 Jun 2022 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 28 Apr 2022 26 Apr 2022
PRE 14A Open PRE 14A document View SEC filing for PRE 14A PRE 14A 18 Apr 2022 09 Jun 2022 001-38129
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 14 Apr 2022 13 Apr 2022
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A SC 13D/A 14 Apr 2022 005-90033
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 13 Apr 2022 12 Apr 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 28 Feb 2022 28 Feb 2022 001-38129
424B5 Open 424B5 document View SEC filing for 424B5 424B5 28 Feb 2022 333-260895
S-8 Open S-8 document View SEC filing for S-8 FORM S-8 28 Feb 2022 333-263085
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 28 Feb 2022 31 Dec 2021 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 28 Feb 2022 28 Feb 2022 001-38129
SC 13G Open SC 13G document View SEC filing for SC 13G 17 Feb 2022 005-90033
SC 13G Open SC 13G document View SEC filing for SC 13G 11 Feb 2022 005-90033
SC 13G Open SC 13G document View SEC filing for SC 13G SCHEDULE 13G 10 Feb 2022 005-90033
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 08 Feb 2022 07 Feb 2022
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A SC 13D/A 08 Feb 2022 005-90033
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SEC SCHEDULE 13G 04 Feb 2022 005-90033
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 03 Feb 2022 02 Feb 2022 001-38129
SC 13G Open SC 13G document View SEC filing for SC 13G 27 Jan 2022 005-90033
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 26 Jan 2022 005-90033
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 19 Jan 2022 14 Jan 2022
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 19 Jan 2022 14 Jan 2022
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 19 Jan 2022 14 Jan 2022
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 19 Jan 2022 14 Jan 2022
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 19 Jan 2022 14 Jan 2022
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 19 Jan 2022 14 Jan 2022
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 19 Jan 2022 14 Jan 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 Jan 2022 03 Jan 2022
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 05 Jan 2022 03 Jan 2022
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 05 Jan 2022 03 Jan 2022
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 05 Jan 2022 03 Jan 2022
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 05 Jan 2022 03 Jan 2022
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 05 Jan 2022 03 Jan 2022
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 05 Jan 2022 03 Jan 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 04 Jan 2022 30 Dec 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Jan 2022 29 Dec 2021
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A SC 13D/A 03 Jan 2022 005-90033
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 20 Dec 2021 20 Dec 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 02 Dec 2021 30 Nov 2021
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 23 Nov 2021 23 Nov 2021 001-38129
EFFECT Open EFFECT document View SEC filing for EFFECT 18 Nov 2021 333-260895
CORRESP Open CORRESP document View SEC filing for CORRESP 16 Nov 2021
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 15 Nov 2021
S-3 Open S-3 document View SEC filing for S-3 S-3 09 Nov 2021 333-260895
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 09 Nov 2021 30 Sep 2021 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 09 Nov 2021 09 Nov 2021 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 29 Oct 2021 29 Oct 2021 001-38129
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 16 Sep 2021 005-90033
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 10 Sep 2021 10 Sep 2021 001-38129
4 Open 4 document View SEC filing for 4 FORM 4 24 Aug 2021 20 Aug 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 18 Aug 2021 16 Aug 2021
3 Open 3 document View SEC filing for 3 OWNERSHIP DOCUMENT 18 Aug 2021 16 Aug 2021
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 16 Aug 2021 16 Aug 2021 001-38129
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 06 Aug 2021 30 Jun 2021 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 06 Aug 2021 06 Aug 2021 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 22 Jul 2021 20 Jul 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 19 Jul 2021 15 Jul 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 19 Jul 2021 15 Jul 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 19 Jul 2021 15 Jul 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 09 Jul 2021 08 Jul 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 02 Jul 2021 01 Jul 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 02 Jul 2021 01 Jul 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 23 Jun 2021 21 Jun 2021
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 17 Jun 2021 11 Jun 2021 001-38129
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 15 Jun 2021 11 Jun 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 15 Jun 2021 11 Jun 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 15 Jun 2021 11 Jun 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 15 Jun 2021 11 Jun 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 15 Jun 2021 11 Jun 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 15 Jun 2021 11 Jun 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 03 Jun 2021 01 Jun 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 24 May 2021 20 May 2021
S-8 Open S-8 document View SEC filing for S-8 FORM S-8 10 May 2021 333-255975
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 10 May 2021 10 May 2021 001-38129
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 10 May 2021 31 Mar 2021 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 28 Apr 2021 26 Apr 2021
3 Open 3 document View SEC filing for 3 OWNERSHIP DOCUMENT 28 Apr 2021 26 Apr 2021
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 27 Apr 2021 001-38129
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 27 Apr 2021 11 Jun 2021 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 22 Apr 2021 20 Apr 2021
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 09 Apr 2021 05 Apr 2021 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 24 Mar 2021 22 Mar 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 11 Mar 2021 09 Mar 2021
3 Open 3 document View SEC filing for 3 OWNERSHIP DOCUMENT 11 Mar 2021 09 Mar 2021
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 11 Mar 2021 11 Mar 2021 001-38129
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 26 Feb 2021 31 Dec 2020 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 26 Feb 2021 26 Feb 2021 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 24 Feb 2021 22 Feb 2021
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MERSANA THERAPEUTICS SC 13G/A 12 Feb 2021 005-90033
SC 13G Open SC 13G document View SEC filing for SC 13G MERSANA THERAPEUTICS, INC. 12 Feb 2021 005-90033
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 3 TO THE SCHEDULE 13G 11 Feb 2021 005-90033
SC 13G Open SC 13G document View SEC filing for SC 13G SEC SCHEDULE 13G 04 Feb 2021 005-90033
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 27 Jan 2021 005-90033
SC 13G Open SC 13G document View SEC filing for SC 13G SCHEDULE 13G 25 Jan 2021 005-90033
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 22 Jan 2021 20 Jan 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 20 Jan 2021 15 Jan 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 20 Jan 2021 15 Jan 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 20 Jan 2021 15 Jan 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 20 Jan 2021 15 Jan 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 20 Jan 2021 15 Jan 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 20 Jan 2021 15 Jan 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 20 Jan 2021 15 Jan 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 20 Jan 2021 15 Jan 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 20 Jan 2021 15 Jan 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 20 Jan 2021 15 Jan 2021
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 20 Jan 2021 15 Jan 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 12 Jan 2021 08 Jan 2021
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A SC 13D/A 12 Jan 2021 005-90033
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 06 Jan 2021 04 Jan 2021
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 05 Jan 2021 05 Jan 2021 001-38129
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 30 Dec 2020 28 Dec 2020
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 22 Dec 2020 21 Dec 2020
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 15 Dec 2020 14 Dec 2020
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A NEW ENTERPRISE ASSOCIATES 14, L.P. -- MERSANA THERAPEUTICS. 13DA5 10 Dec 2020 005-90033
4 Open 4 document View SEC filing for 4 4 03 Dec 2020 01 Dec 2020
4 Open 4 document View SEC filing for 4 4 02 Dec 2020 30 Nov 2020
3 Open 3 document View SEC filing for 3 3 02 Dec 2020 30 Nov 2020
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 30 Nov 2020 30 Nov 2020 001-38129
4 Open 4 document View SEC filing for 4 4 24 Nov 2020 20 Nov 2020
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A NEW ENTERPRISE ASSOCIATES 14, L.P. -- MERSANA THERAPEUTICS. 13DA4 19 Nov 2020 005-90033
4 Open 4 document View SEC filing for 4 4 12 Nov 2020 14 Sep 2020
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 09 Nov 2020 30 Sep 2020 001-38129
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 09 Nov 2020 09 Nov 2020 001-38129
4 Open 4 document View SEC filing for 4 4 22 Oct 2020 20 Oct 2020
4 Open 4 document View SEC filing for 4 4 23 Sep 2020 21 Sep 2020
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A NEW ENTERPRISE ASSOCIATES 14, L.P. -- MERSANA THERAPEUTICS. 13DA3 22 Sep 2020 005-90033
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 17 Sep 2020 17 Sep 2020 001-38129
4 Open 4 document View SEC filing for 4 4 16 Sep 2020 14 Sep 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 16 Sep 2020 14 Sep 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 16 Sep 2020 14 Sep 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 16 Sep 2020 14 Sep 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 16 Sep 2020 14 Sep 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 16 Sep 2020 14 Sep 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 16 Sep 2020 14 Sep 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 16 Sep 2020 14 Sep 2020
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 03 Sep 2020 28 Aug 2020 001-38129
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 07 Aug 2020 30 Jun 2020 001-38129
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 07 Aug 2020 07 Aug 2020 001-38129
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 10 Jul 2020 005-90033
4 Open 4 document View SEC filing for 4 4 06 Jul 2020 02 Jul 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 29 Jun 2020 25 Jun 2020
4 Open 4 document View SEC filing for 4 4 29 Jun 2020 25 Jun 2020
4 Open 4 document View SEC filing for 4 4 29 Jun 2020 25 Jun 2020
4 Open 4 document View SEC filing for 4 4 29 Jun 2020 25 Jun 2020
4 Open 4 document View SEC filing for 4 4 29 Jun 2020 25 Jun 2020
4 Open 4 document View SEC filing for 4 4 24 Jun 2020 13 Apr 2020
3 Open 3 document View SEC filing for 3 3 24 Jun 2020 13 Apr 2020
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 16 Jun 2020 12 Jun 2020 001-38129
4 Open 4 document View SEC filing for 4 4 03 Jun 2020 01 Jun 2020
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 01 Jun 2020 28 May 2020 001-38129
424B5 Open 424B5 document View SEC filing for 424B5 424B5 29 May 2020 333-238140
S-3MEF Open S-3MEF document View SEC filing for S-3MEF S-3MEF 28 May 2020 333-238761
424B5 Open 424B5 document View SEC filing for 424B5 424B5 28 May 2020 333-238140
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 27 May 2020 27 May 2020 001-38129
EFFECT Open EFFECT document View SEC filing for EFFECT 15 May 2020 333-238140
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 14 May 2020 14 May 2020 001-38129
CORRESP Open CORRESP document View SEC filing for CORRESP 13 May 2020
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 13 May 2020
S-3 Open S-3 document View SEC filing for S-3 S-3 08 May 2020 333-238140
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 08 May 2020 31 Mar 2020 001-38129
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 08 May 2020 08 May 2020 001-38129
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A NEW ENTERPRISE ASSOCIATES 14, L.P. -- MERSANA THERAPEUTICS. 13DA2 24 Apr 2020 005-90033
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 20 Apr 2020 001-38129
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 20 Apr 2020 12 Jun 2020 001-38129
SC 13D Open SC 13D document View SEC filing for SC 13D SC 13D 17 Apr 2020 005-90033
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 15 Apr 2020 13 Apr 2020 001-38129
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 14 Apr 2020 13 Apr 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 14 Apr 2020 13 Apr 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 13 Apr 2020 09 Apr 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 13 Apr 2020 09 Apr 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 13 Apr 2020 09 Apr 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 13 Apr 2020 09 Apr 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 13 Apr 2020 09 Apr 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 13 Apr 2020 09 Apr 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 13 Apr 2020 09 Apr 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 13 Apr 2020 09 Apr 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 13 Apr 2020 28 Aug 2019
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 09 Apr 2020 07 Apr 2020
424B5 Open 424B5 document View SEC filing for 424B5 424B5 09 Apr 2020 333-226055
4 Open 4 document View SEC filing for 4 4 09 Apr 2020 07 Apr 2020
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 08 Apr 2020 07 Apr 2020 001-38129
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 30 Mar 2020 30 Mar 2020 001-38129
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 20 Mar 2020 20 Mar 2020 001-38129
CT ORDER Open CT ORDER document View SEC filing for CT ORDER 17 Mar 2020 333-218412
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 16 Mar 2020 11 Mar 2020 001-38129
S-8 Open S-8 document View SEC filing for S-8 FORM S-8 28 Feb 2020 333-236775
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 28 Feb 2020 31 Dec 2019 001-38129
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 28 Feb 2020 28 Feb 2020 001-38129
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SCHEDULE 13G HOLDINGS REPORT AMENDMENT 14 Feb 2020 005-90033
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 2 TO THE SCHEDULE 13G 14 Feb 2020 005-90033
SC 13G Open SC 13G document View SEC filing for SC 13G 07 Feb 2020 005-90033
4 Open 4 document View SEC filing for 4 4 16 Jan 2020 15 Jan 2020
4 Open 4 document View SEC filing for 4 4 16 Jan 2020 15 Jan 2020
4 Open 4 document View SEC filing for 4 4 16 Jan 2020 15 Jan 2020
4 Open 4 document View SEC filing for 4 4 16 Jan 2020 15 Jan 2020
4 Open 4 document View SEC filing for 4 4 16 Jan 2020 15 Jan 2020
4 Open 4 document View SEC filing for 4 4 16 Jan 2020 15 Jan 2020
4 Open 4 document View SEC filing for 4 4 16 Jan 2020 15 Jan 2020
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 10 Jan 2020 10 Jan 2020 001-38129
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Jan 2020 02 Jan 2020
4 Open 4 document View SEC filing for 4 4 03 Jan 2020 02 Jan 2020
4 Open 4 document View SEC filing for 4 4 03 Jan 2020 02 Jan 2020
4 Open 4 document View SEC filing for 4 4 03 Jan 2020 02 Jan 2020
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 23 Dec 2019 005-90033
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 27 Nov 2019 26 Nov 2019 001-38129
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 06 Nov 2019 30 Sep 2019 001-38129
8-K Open 8-K document View SEC filing for 8-K 8-K 06 Nov 2019 06 Nov 2019 001-38129
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 1 TO SCHEDULE 13G 09 Oct 2019 005-90033
8-K Open 8-K document View SEC filing for 8-K 8-K 21 Aug 2019 20 Aug 2019 001-38129
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 08 Aug 2019 30 Jun 2019 001-38129
8-K Open 8-K document View SEC filing for 8-K 8-K 08 Aug 2019 08 Aug 2019 001-38129
8-K Open 8-K document View SEC filing for 8-K 8-K 26 Jul 2019 26 Jul 2019 001-38129
4 Open 4 document View SEC filing for 4 4 19 Jul 2019 17 Jul 2019
4 Open 4 document View SEC filing for 4 4 19 Jul 2019 17 Jul 2019
4 Open 4 document View SEC filing for 4 4 19 Jul 2019 17 Jul 2019
4 Open 4 document View SEC filing for 4 4 19 Jul 2019 17 Jul 2019
4 Open 4 document View SEC filing for 4 4 19 Jul 2019 17 Jul 2019
4 Open 4 document View SEC filing for 4 4 12 Jul 2019 10 Jul 2019
3 Open 3 document View SEC filing for 3 3 12 Jul 2019 10 Jul 2019
8-K Open 8-K document View SEC filing for 8-K 8-K 12 Jun 2019 07 Jun 2019 001-38129
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 11 Jun 2019 07 Jun 2019
4 Open 4 document View SEC filing for 4 4 11 Jun 2019 07 Jun 2019
4 Open 4 document View SEC filing for 4 4 11 Jun 2019 07 Jun 2019
4 Open 4 document View SEC filing for 4 4 11 Jun 2019 07 Jun 2019
4 Open 4 document View SEC filing for 4 4 11 Jun 2019 07 Jun 2019
8-K Open 8-K document View SEC filing for 8-K 8-K 07 Jun 2019 07 Jun 2019 001-38129
8-K Open 8-K document View SEC filing for 8-K 8-K 05 Jun 2019 01 Jun 2019 001-38129
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 09 May 2019 31 Mar 2019 001-38129
8-K Open 8-K document View SEC filing for 8-K 8-K 09 May 2019 09 May 2019 001-38129
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 23 Apr 2019 001-38129
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 23 Apr 2019 07 Jun 2019 001-38129
8-K Open 8-K document View SEC filing for 8-K 8-K 08 Apr 2019 08 Apr 2019 001-38129
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A NEW ENTERPRISE ASSOCIATES 14, L.P. - MERSANA THERAPEUTICS 13D/A(#1) 14 Mar 2019 005-90033
SC 13G Open SC 13G document View SEC filing for SC 13G THE SCHEDULE 13G 11 Mar 2019 005-90033
SC 13G Open SC 13G document View SEC filing for SC 13G SCHEDULE 13G 11 Mar 2019 005-90033
S-8 Open S-8 document View SEC filing for S-8 S-8 08 Mar 2019 333-230159
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 08 Mar 2019 31 Dec 2018 001-38129
8-K Open 8-K document View SEC filing for 8-K 8-K 08 Mar 2019 08 Mar 2019 001-38129
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Mar 2019 05 Mar 2019
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Mar 2019 05 Mar 2019
424B5 Open 424B5 document View SEC filing for 424B5 424B5 04 Mar 2019 333-226055
8-K Open 8-K document View SEC filing for 8-K 8-K 04 Mar 2019 28 Feb 2019 001-38129
424B5 Open 424B5 document View SEC filing for 424B5 424B5 28 Feb 2019 333-226055
8-K Open 8-K document View SEC filing for 8-K 8-K 28 Feb 2019 28 Feb 2019 001-38129
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SCHEDULE 13G HOLDINGS REPORT AMENDMENT 14 Feb 2019 005-90033
SC 13G Open SC 13G document View SEC filing for SC 13G 14 Feb 2019 005-90033
4 Open 4 document View SEC filing for 4 4 25 Jan 2019 23 Jan 2019
4 Open 4 document View SEC filing for 4 4 25 Jan 2019 23 Jan 2019
4 Open 4 document View SEC filing for 4 4 25 Jan 2019 23 Jan 2019
4 Open 4 document View SEC filing for 4 4 25 Jan 2019 23 Jan 2019
4 Open 4 document View SEC filing for 4 4 25 Jan 2019 23 Jan 2019
4 Open 4 document View SEC filing for 4 4 25 Jan 2019 23 Jan 2019
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SEC SCHEDULE 13G 10 Jan 2019 005-90033
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 04 Jan 2019 02 Jan 2019
4 Open 4 document View SEC filing for 4 4 04 Jan 2019 02 Jan 2019
4 Open 4 document View SEC filing for 4 4 04 Jan 2019 02 Jan 2019
8-K Open 8-K document View SEC filing for 8-K 8-K 04 Jan 2019 04 Jan 2019 001-38129
8-K Open 8-K document View SEC filing for 8-K 8-K 04 Jan 2019 02 Jan 2019 001-38129
4 Open 4 document View SEC filing for 4 4 03 Dec 2018 30 Nov 2018
3 Open 3 document View SEC filing for 3 3 03 Dec 2018 30 Nov 2018
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 13 Nov 2018 30 Sep 2018 001-38129
8-K Open 8-K document View SEC filing for 8-K 8-K 13 Nov 2018 13 Nov 2018 001-38129
4 Open 4 document View SEC filing for 4 4 25 Sep 2018 24 Sep 2018
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 21 Sep 2018 20 Sep 2018
4 Open 4 document View SEC filing for 4 4 21 Sep 2018 20 Sep 2018
4 Open 4 document View SEC filing for 4 4 21 Sep 2018 20 Sep 2018
4 Open 4 document View SEC filing for 4 4 21 Sep 2018 20 Sep 2018
EFFECT Open EFFECT document View SEC filing for EFFECT 17 Sep 2018 333-226055
8-K Open 8-K document View SEC filing for 8-K 8-K 17 Sep 2018 17 Sep 2018 001-38129
S-3/A Open S-3/A document View SEC filing for S-3/A S-3/A 14 Sep 2018 333-226055
CORRESP Open CORRESP document View SEC filing for CORRESP 12 Sep 2018
4 Open 4 document View SEC filing for 4 4 29 Aug 2018 27 Aug 2018
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 14 Aug 2018 30 Jun 2018 001-38129
8-K Open 8-K document View SEC filing for 8-K 8-K 14 Aug 2018 14 Aug 2018 001-38129
4 Open 4 document View SEC filing for 4 4 25 Jul 2018 23 Jul 2018
8-K Open 8-K document View SEC filing for 8-K 8-K 23 Jul 2018 19 Jul 2018 001-38129
CORRESP Open CORRESP document View SEC filing for CORRESP 16 Jul 2018
CORRESP Open CORRESP document View SEC filing for CORRESP 12 Jul 2018
CORRESP Open CORRESP document View SEC filing for CORRESP 12 Jul 2018
S-3/A Open S-3/A document View SEC filing for S-3/A S-3/A 12 Jul 2018 333-226055
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 11 Jul 2018
4 Open 4 document View SEC filing for 4 4 05 Jul 2018 03 Jul 2018
S-3 Open S-3 document View SEC filing for S-3 S-3 02 Jul 2018 333-226055
8-K Open 8-K document View SEC filing for 8-K 8-K 29 Jun 2018 27 Jun 2018 001-38129
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 11 Jun 2018 001-38129
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 15 May 2018 31 Mar 2018 001-38129
8-K Open 8-K document View SEC filing for 8-K 8-K 14 May 2018 14 May 2018 001-38129
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 30 Apr 2018 27 Jun 2018 001-38129
8-K Open 8-K document View SEC filing for 8-K 8-K 10 Apr 2018 09 Apr 2018 001-38129
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 28 Mar 2018 31 Dec 2017 001-38129
8-K Open 8-K document View SEC filing for 8-K 8-K 28 Mar 2018 28 Mar 2018 001-38129
4 Open 4 document View SEC filing for 4 4 21 Mar 2018 19 Mar 2018
3 Open 3 document View SEC filing for 3 3 21 Mar 2018 19 Mar 2018
8-K Open 8-K document View SEC filing for 8-K 8-K 19 Mar 2018 19 Mar 2018 001-38129
4 Open 4 document View SEC filing for 4 4 14 Mar 2018 12 Mar 2018
3 Open 3 document View SEC filing for 3 3 14 Mar 2018 12 Mar 2018
8-K Open 8-K document View SEC filing for 8-K 8-K 12 Mar 2018 12 Mar 2018 001-38129
8-K Open 8-K document View SEC filing for 8-K 8-K 02 Mar 2018 26 Feb 2018 001-38129
4 Open 4 document View SEC filing for 4 4 23 Feb 2018 21 Feb 2018
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 13G/A 14 Feb 2018 005-90033
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SCHEDULE 13G AMENDMENT 1 13 Feb 2018 005-90033
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 13 Feb 2018 005-90033
SC 13G Open SC 13G document View SEC filing for SC 13G 09 Feb 2018 005-90033
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SEC SCHEDULE 13G 08 Feb 2018 005-90033
4 Open 4 document View SEC filing for 4 4 06 Feb 2018 02 Feb 2018
4 Open 4 document View SEC filing for 4 4 06 Feb 2018 02 Feb 2018
4 Open 4 document View SEC filing for 4 4 06 Feb 2018 02 Feb 2018
4 Open 4 document View SEC filing for 4 4 06 Feb 2018 02 Feb 2018
4 Open 4 document View SEC filing for 4 4 06 Feb 2018 02 Feb 2018
4 Open 4 document View SEC filing for 4 4 06 Feb 2018 02 Feb 2018
S-8 Open S-8 document View SEC filing for S-8 S-8 02 Feb 2018 333-222845
4 Open 4 document View SEC filing for 4 4 01 Feb 2018 30 Jan 2018
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 04 Jan 2018 02 Jan 2018
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 04 Jan 2018 02 Jan 2018
4 Open 4 document View SEC filing for 4 4 04 Jan 2018 02 Jan 2018
4 Open 4 document View SEC filing for 4 4 04 Jan 2018 02 Jan 2018
4 Open 4 document View SEC filing for 4 4 21 Dec 2017 20 Dec 2017
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 13 Nov 2017 30 Sep 2017 001-38129
8-K Open 8-K document View SEC filing for 8-K 8-K 09 Nov 2017 09 Nov 2017 001-38129
4 Open 4 document View SEC filing for 4 4 07 Sep 2017 05 Sep 2017
3 Open 3 document View SEC filing for 3 3 07 Sep 2017 05 Sep 2017
8-K Open 8-K document View SEC filing for 8-K 8-K 06 Sep 2017 05 Sep 2017 001-38129
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 11 Aug 2017 30 Jun 2017 001-38129
8-K Open 8-K document View SEC filing for 8-K 8-K 11 Aug 2017 11 Aug 2017 001-38129
SC 13G Open SC 13G document View SEC filing for SC 13G SEC SCHEDULE 13G 10 Aug 2017 005-90033
S-8 Open S-8 document View SEC filing for S-8 S-8 21 Jul 2017 333-219388
SC 13G Open SC 13G document View SEC filing for SC 13G SCHEDULE 13G 13 Jul 2017 005-90033
SC 13D Open SC 13D document View SEC filing for SC 13D MERSANA THERAPEUTICS, INC. - SCHEDULE 13D 11 Jul 2017 005-90033
8-K Open 8-K document View SEC filing for 8-K 8-K 10 Jul 2017 03 Jul 2017 001-38129
SC 13G Open SC 13G document View SEC filing for SC 13G 13G 07 Jul 2017 005-90033
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jul 2017 03 Jul 2017
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jul 2017 03 Jul 2017
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jul 2017 03 Jul 2017
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jul 2017 03 Jul 2017
4 Open 4 document View SEC filing for 4 4 06 Jul 2017 03 Jul 2017
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jul 2017 03 Jul 2017
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jul 2017 03 Jul 2017
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jul 2017 03 Jul 2017
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jul 2017 03 Jul 2017
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jul 2017 03 Jul 2017
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jul 2017 03 Jul 2017
SC 13G Open SC 13G document View SEC filing for SC 13G 06 Jul 2017 005-90033
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 06 Jul 2017 03 Jul 2017
424B4 Open 424B4 document View SEC filing for 424B4 424B4 29 Jun 2017 333-218412
CT ORDER Open CT ORDER document View SEC filing for CT ORDER 29 Jun 2017 333-218412
EFFECT Open EFFECT document View SEC filing for EFFECT 27 Jun 2017 333-218412
3/A Open 3/A document View SEC filing for 3/A FORM 3/A SUBMISSION 27 Jun 2017 27 Jun 2017
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 27 Jun 2017 27 Jun 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 27 Jun 2017 27 Jun 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 27 Jun 2017 27 Jun 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 27 Jun 2017 27 Jun 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 27 Jun 2017 27 Jun 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 27 Jun 2017 27 Jun 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 27 Jun 2017 27 Jun 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 27 Jun 2017 27 Jun 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 27 Jun 2017 27 Jun 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 27 Jun 2017 27 Jun 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 27 Jun 2017 27 Jun 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 27 Jun 2017 27 Jun 2017
3 Open 3 document View SEC filing for 3 3 27 Jun 2017 27 Jun 2017
3 Open 3 document View SEC filing for 3 3 27 Jun 2017 27 Jun 2017
3 Open 3 document View SEC filing for 3 3 27 Jun 2017 27 Jun 2017
3 Open 3 document View SEC filing for 3 3 27 Jun 2017 27 Jun 2017
3 Open 3 document View SEC filing for 3 3 27 Jun 2017 27 Jun 2017
3 Open 3 document View SEC filing for 3 3 27 Jun 2017 27 Jun 2017
3 Open 3 document View SEC filing for 3 3 27 Jun 2017 27 Jun 2017
3 Open 3 document View SEC filing for 3 3 27 Jun 2017 27 Jun 2017
3 Open 3 document View SEC filing for 3 3 27 Jun 2017 27 Jun 2017
CERTNAS Open CERTNAS document View SEC filing for CERTNAS AUTO-GENERATED PAPER DOCUMENT 26 Jun 2017 001-38129
CORRESP Open CORRESP document View SEC filing for CORRESP 23 Jun 2017
CORRESP Open CORRESP document View SEC filing for CORRESP 23 Jun 2017
8-A12B Open 8-A12B document View SEC filing for 8-A12B 8-A12B 23 Jun 2017 001-38129
S-1/A Open S-1/A document View SEC filing for S-1/A S-1/A 16 Jun 2017 333-218412
CORRESP Open CORRESP document View SEC filing for CORRESP 14 Jun 2017
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 07 Jun 2017
CORRESP Open CORRESP document View SEC filing for CORRESP 02 Jun 2017
CORRESP Open CORRESP document View SEC filing for CORRESP 01 Jun 2017
S-1 Open S-1 document View SEC filing for S-1 S-1 01 Jun 2017 333-218412
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 25 May 2017
DRSLTR Open DRSLTR document View SEC filing for DRSLTR 12 May 2017
DRS/A Open DRS/A document View SEC filing for DRS/A 12 May 2017 377-01519
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 08 May 2017
DRSLTR Open DRSLTR document View SEC filing for DRSLTR 21 Apr 2017
DRS/A Open DRS/A document View SEC filing for DRS/A 21 Apr 2017 377-01519
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 17 Apr 2017
DRSLTR Open DRSLTR document View SEC filing for DRSLTR 17 Mar 2017
DRS Open DRS document View SEC filing for DRS 17 Mar 2017 377-01519
D Open D document View SEC filing for D 24 Jun 2016 021-265754
D/A Open D/A document View SEC filing for D/A 01 Mar 2016 021-235062
D Open D document View SEC filing for D 03 Mar 2015 021-235062
D/A Open D/A document View SEC filing for D/A 08 Apr 2014 021-204292
D Open D document View SEC filing for D 09 Oct 2013 021-204292
D Open D document View SEC filing for D 09 Aug 2012 021-182471
D/A Open D/A document View SEC filing for D/A 18 Apr 2012 021-158771
D Open D document View SEC filing for D 21 Apr 2011 021-158771
D Open D document View SEC filing for D 26 Feb 2010 021-121447

About this filer

Mersana Therapeutics, Inc. files with the SEC under CIK 0001442836. This page aggregates EDGAR filings and related ownership activity.

Industry: Pharmaceutical Preparations.

See insider transactions for this issuer.

FAQ

What is a CIK?
A Central Index Key (CIK) is a unique identifier assigned by the SEC to each filer.
Why are some filings missing?
New filings appear as the SEC updates EDGAR, and older records can vary by availability.
How often is this page updated?
Updates follow new EDGAR submissions and periodic data refreshes.

Related pages