Mersana Therapeutics, Inc. 

MA

  SEC # 1442836

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541  SEC Filings   from  8/14/08  to  4/3/24  (2 Weeks Ago)

List All Filings	or	Filer / Offerer   Owner / Insider   Issuer / Subject Company   Filing Agent
Most-Recent Filing:		‘4’ — Statement of Changes in Beneficial Ownership of Securities by an Insider — Form 4 — for 4/1/24 — Filed re:  Issuer / Subject Company — Filed by:  Alleva Lawrence M
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Forms , Documents & Exhibits  in  198 Filings  Filed as:  Filer / Offerer  or  Owner / Insider

        

Latest Filing			Type		Category	Description		Documents
2/28/24			8-K		Update:		Current Reports — Form 8-K — Press Releases & Conference Calls  — Financial Reports	92
					8-K Items:
2/28/24			Business & Operations:			•	Entry into a Material Definitive Agreement — Item 1.01 — ↓‘EX-10’	16
12/21/23			"			•	Termination of a Material Definitive Agreement — Item 1.02 — ↓‘EX-10’	3
2/28/24			Financial Info:			•	Results of Operations and Financial Condition — Item 2.02 — Financial Reports	30
12/27/22	OLD		"			•	Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant — Item 2.03  OLD  — ↓‘EX-10’	3
7/27/23			"			•	Cost Associated with Exit or Disposal Activities — Item 2.05	1
11/27/19	OLD		Securities & Trading:			•	Unregistered Sales of Equity Securities — Item 3.02  OLD  — ↓‘EX-1’	1
9/6/23			Governance & Management:			•	Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers — Item 5.02 — List of Directors & Officers	12
6/9/23			"			•	Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year — Item 5.03 — ↓‘EX-3’	4
6/9/23			"			•	Submission of Matters to a Vote of Security Holders — Item 5.07	6
2/28/24			Disclosures:			•	Regulation FD Disclosure — Item 7.01 — ↓‘EX-99’	17
1/5/24			Events:			•	Other Events — Item 8.01	33
2/28/24			Financials:			•	Financial Statements and Exhibits — Item 9.01 — Financial Reports	76
2/28/24			424B5		Registration:		Prospectuses – Primary Offerings and Shelf Securities – New Facts or Events	8
2/28/24			POS AM		Registration:		Post-Effective Amendment of a Registration Statement	1
2/28/24			10-K		Update:		Annual Reports — Form 10-K — Financial Reports	7
2/28/24			POSASR		Registration:		Post-Effective Amendment of an Automatic Shelf Registration Statement — Form S-3/F-3ASR	1
1/12/24			S-8		Registration:		Registration Statements – Securities for Certain Employee Benefit Plans — Form S-8	8
11/7/23			10-Q		Update:		Quarterly Reports — Form 10-Q — Financial Reports	20
5/9/23			S-3ASR		Registration:		Automatic Shelf Registration Statement by a Well-Known Issuer — Form S-3	1
4/28/23			ARS		Update:		Annual Report to Security Holders	1
4/28/23			DEFA14A		Proxy:		Definitive Additional Proxy Soliciting Materials — Schedule 14A	6
4/28/23			DEF 14A		Proxy:		Definitive Proxy Statements — Schedule 14A	6
4/14/23	OLD		PRE 14A		Proxy:		Preliminary Proxy Statements — Schedule 14A  OLD	2
11/19/21	OLD		EFFECT		SEC:		SEC Notices of Effectiveness  OLD	4
11/16/21	OLD		CORRESP		Comment:		Comment-Response and Other Letters to the SEC  [ a.k.a. COVER ]  OLD  — All Correspondence with the SEC	11
11/9/21	OLD		S-3		Registration:		Registration Statements – Securities for Transactions — Form S-3  OLD	5
5/28/20	OLD		S-3MEF		Registration:		Registration Statement to Add Securities to a Prior Form S-3 Registration  OLD	1
3/17/20	OLD		CT ORDER		SEC:		SEC Confidential Treatment Orders  OLD	2
6/29/17	OLD		424B4		Registration:		Prospectus – Info Previously Omitted & New Facts or Events  OLD	1
6/26/17	OLD		CERTNAS		Trading:		Certification by the Nasdaq Stock Market Approving a Listing — Form CERT  OLD	1
6/23/17	OLD		8-A12B		Registration:		Registration Statement for a Class of Securities — Form 8-A  OLD	1
6/16/17	OLD		S-1		Registration:		Registration Statements (General Form) — Form S-1  OLD	2
5/12/17	OLD		DRSLTR		Comment:		Comment-Response and Draft-Registration-Statement Letters to the SEC  [ a.k.a. CORRESP ]  OLD  — All Correspondence with the SEC	3
5/12/17	OLD		DRS		Registration:		Draft Registration Statements by Emerging Growth Companies and Foreign Issuers — Form DRS  OLD	3
6/24/16	OLD		D		Registration:		Notices of Exempt Offerings of Securities — Form D  OLD	9
3/3/09	OLD		REGDEX		Registration:		Notices of Exempt Offerings of Securities — Form D  OLD	2
					General Exhibits:
2/28/24			EX-5		Opinions of Counsel re: Legality			22
2/28/24			EX-1		Underwriting Agreements  (and mislabeled “1st Exhibits”)			8
2/28/24			EX-23		Consents of Experts and Counsel			26
2/28/24			EX-97		Clawback Policies re: Recovery of Erroneously Awarded Compensation			2
2/28/24			EX-10		Material Contracts			100
2/28/24			EX-FILING FEES		Filing Fees			5
6/9/23			EX-3		Articles of Incorporation/Organization and Bylaws			13
2/28/23	OLD		EX-4		Instruments, Including Indentures, Defining the Rights of Security Holders  OLD			7
2/28/23	OLD		EX-21		Subsidiaries Lists  OLD			8
					Additional Exhibits:
2/28/24			EX-99		Miscellaneous Exhibits, such as Press Releases — Press Releases & Conference Calls			69
					Financials:
2/28/24			XML  &  R#		IDEA Financial Reports Info — Financial Reports			1,856
2/28/24			EXCEL		IDEA Workbooks of Financial Reports Info — Workbooks of Financial Reports			76
2/28/24			EX-101.*		XBRL Data  (XBRL Files)			294
2/28/24			JSON		XBRL Instances as JavaScript Object Notation Data  (JSON Files)			64
2/28/24			ZIP		XBRL Zipped Folders   (Folders of XBRL Files)			76
2/28/24			EX-31		Certifications — §302 – SOA’02			54
2/28/24			EX-32		Certifications — §906 – SOA’02			27
					Graphics:
2/28/24			GRAPHIC		Photos, Images and Graphs			524

Forms , Documents & Exhibits  in  343 Filings  Filed re:  Issuer / Subject Company

        

List all Money Managers that own this Security Issuer:  CUSIP 59045L

        

Latest Filing			Type		Category	Description		Documents
4/3/24			4		Ownership:		Statements of Changes in Beneficial Ownership of Securities by Insiders — Form 4	234
2/14/24			SC 13G		Ownership:		Statements of Acquisitions of Beneficial Ownership by “Passive” Investors — Schedule 13G	52
1/16/24			144		Ownership:		Notices of Proposed Sales of Securities by Insiders — Form 144	4
9/7/23			3		Ownership:		Initial Statements of Beneficial Ownership of Securities by Insiders — Form 3	34
5/11/22	OLD		SC 13D		Ownership:		Statements of Acquisitions of Beneficial Ownership by “Active” Investors — Schedule 13D  OLD	12
					Letters:
11/15/21	OLD		LETTER		Comment and Other Letters from the SEC  [ a.k.a. UPLOAD ]  OLD  — All Correspondence with the SEC			7
11/15/21	OLD		TEXT-EXTRACT		Comment and Other Letters from the SEC – PDFs’ Text  [ a.k.a. LETTER ]  OLD			3
					General Exhibits:
9/7/23			EX-24		Powers of Attorney			42
					Additional Exhibits:
2/14/24			EX-99		Miscellaneous Exhibits, such as Press Releases			13

        

Filings History

Year		# of Filings
2024		34
2023		79
2022		67
2021		73
2020		93
2019		55
2018		58
2017		71
2016		2
2015		1
2014		1
2013		1
2012		2
2011		1
2010		1
2009		1
2008		1