Log in

NASDAQ:MACKMerrimack Pharmaceuticals SEC Filings & 10K Form

$3.39
+0.06 (+1.80 %)
(As of 06/1/2020 04:00 PM ET)
Add
Compare
Today's Range
$3.28
Now: $3.39
$3.39
50-Day Range
$3.33
MA: $3.56
$3.88
52-Week Range
$1.49
Now: $3.39
$7.09
Volume9,600 shs
Average Volume38,942 shs
Market Capitalization$45.36 million
P/E RatioN/A
Dividend YieldN/A
Beta2.44

SEC Filings

Merrimack Pharmaceuticals (NASDAQ:MACK) SEC Filings

DateFilerForm TypeView
05/28/2020
4:00 PM
Merrimack Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
04/22/2020
1:30 PM
Ledo Capital, LLC (Reporting)
Levy Noah G. (Reporting)
Merrimack Pharmaceuticals (Issuer)
Newtyn Capital Partners, LP (Reporting)
Newtyn Management, LLC (Reporting)
NEWTYN PARTNERS, LP (Reporting)
NEWTYN TE PARTNERS, LP (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
04/22/2020
1:27 PM
Andersen Eric (Reporting)
Merrimack Pharmaceuticals (Issuer)
Western Standard LLC (Reporting)
WESTERN STANDARD PARTNERS LP (Reporting)
Western Standard Partners QP, L.P. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
04/10/2020
3:35 PM
Merrimack Pharmaceuticals (Filer)
Form PRE 14A
04/08/2020
4:40 PM
Andersen Eric (Reporting)
Merrimack Pharmaceuticals (Issuer)
Western Standard LLC (Reporting)
WESTERN STANDARD PARTNERS LP (Reporting)
Western Standard Partners QP, L.P. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
04/08/2020
4:37 PM
Ledo Capital, LLC (Reporting)
Levy Noah G. (Reporting)
Merrimack Pharmaceuticals (Issuer)
Newtyn Capital Partners, LP (Reporting)
Newtyn Management, LLC (Reporting)
NEWTYN PARTNERS, LP (Reporting)
NEWTYN TE PARTNERS, LP (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
04/07/2020
6:24 PM
Ledo Capital, LLC (Reporting)
Levy Noah G. (Reporting)
Merrimack Pharmaceuticals (Issuer)
Newtyn Capital Partners, LP (Reporting)
Newtyn Management, LLC (Reporting)
NEWTYN PARTNERS, LP (Reporting)
NEWTYN TE PARTNERS, LP (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
04/07/2020
6:23 PM
Andersen Eric (Reporting)
Merrimack Pharmaceuticals (Issuer)
Western Standard LLC (Reporting)
WESTERN STANDARD PARTNERS LP (Reporting)
Western Standard Partners QP, L.P. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/30/2020
7:12 AM
Merrimack Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
03/12/2020
4:17 PM
Merrimack Pharmaceuticals (Filer)
Form 10-K
Annual report pursuant to Section 13 or 15(d)  
02/14/2020
2:17 PM
BIOTECHNOLOGY VALUE FUND L P (Filed by)
Merrimack Pharmaceuticals (Subject)
Form SC 13G/A
02/14/2020
11:23 AM
Merrimack Pharmaceuticals (Subject)
Nantahala Capital Management, LLC (Filed by)
Form SC 13G
12/03/2019
8:16 AM
Merrimack Pharmaceuticals (Filer)
Form 8-A12G
12/03/2019
8:14 AM
Merrimack Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
11/19/2019
3:00 PM
JFL Capital Management, LLC (Filed by)
Merrimack Pharmaceuticals (Subject)
Form SC 13D/A
11/12/2019
3:16 PM
Merrimack Pharmaceuticals (Filer)
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
10/21/2019
7:01 AM
Merrimack Pharmaceuticals (Issuer)
Nielsen Ulrik B. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
10/21/2019
6:58 AM
Merrimack Pharmaceuticals (Issuer)
RAY RUSSELL T (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
10/21/2019
6:55 AM
CROCKER GARY L (Reporting)
Merrimack Pharmaceuticals (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
10/21/2019
6:23 AM
Merrimack Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
09/27/2019
5:58 PM
Ledo Capital, LLC (Reporting)
Levy Noah G. (Reporting)
Merrimack Pharmaceuticals (Issuer)
Newtyn Capital Partners, LP (Reporting)
Newtyn Management, LLC (Reporting)
NEWTYN PARTNERS, LP (Reporting)
NEWTYN TE PARTNERS, LP (Reporting)
Form 3
Initial statement of beneficial ownership of securities  
09/27/2019
5:15 PM
Andersen Eric (Reporting)
Merrimack Pharmaceuticals (Issuer)
Western Standard LLC (Reporting)
WESTERN STANDARD PARTNERS LP (Reporting)
Western Standard Partners QP, L.P. (Reporting)
Form 3
Initial statement of beneficial ownership of securities  
09/26/2019
3:31 PM
Merrimack Pharmaceuticals (Filer)
Form DEF 14A
09/24/2019
3:52 PM
JFL Capital Management, LLC (Filed by)
Merrimack Pharmaceuticals (Subject)
Form SC 13D/A
09/24/2019
3:49 PM
JFL Capital Management, LLC (Filed by)
Merrimack Pharmaceuticals (Subject)
Form DFAN14A
09/20/2019
3:32 PM
Merrimack Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
09/20/2019
3:31 PM
Merrimack Pharmaceuticals (Filer)
Form DEFA14A
09/20/2019
7:02 AM
Merrimack Pharmaceuticals (Filer)
Form PRER14A
09/19/2019
11:40 AM
Merrimack Pharmaceuticals (Subject)
Newtyn Management, LLC (Filed by)
Form SC 13D
09/19/2019
11:31 AM
Merrimack Pharmaceuticals (Subject)
Western Standard LLC (Filed by)
Form SC 13D
09/19/2019
9:23 AM
Merrimack Pharmaceuticals (Filer)
Form DEFA14A
09/05/2019
9:15 AM
Merrimack Pharmaceuticals (Filer)
Form DEFA14A
08/26/2019
2:36 PM
Merrimack Pharmaceuticals (Filer)
Form DEFA14A
08/22/2019
3:13 PM
JFL Capital Management, LLC (Filed by)
Merrimack Pharmaceuticals (Subject)
Form DFAN14A
08/19/2019
12:27 PM
JFL Capital Management, LLC (Filed by)
Merrimack Pharmaceuticals (Subject)
Form PRRN14A
08/16/2019
4:23 PM
Merrimack Pharmaceuticals (Filer)
Form PRER14A
08/16/2019
9:50 AM
Merrimack Pharmaceuticals (Filer)
Form DEFA14A
08/13/2019
2:32 PM
JFL Capital Management, LLC (Filed by)
Merrimack Pharmaceuticals (Subject)
Form PRRN14A
08/06/2019
4:21 PM
JFL Capital Management, LLC (Filed by)
Merrimack Pharmaceuticals (Subject)
Form PREC14A
08/05/2019
4:21 PM
Merrimack Pharmaceuticals (Subject)
Form PREC14A
07/26/2019
3:15 PM
Merrimack Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
07/25/2019
7:36 PM
22NW GP, Inc. (Reporting)
Merrimack Pharmaceuticals (Issuer)
Form 3
Initial statement of beneficial ownership of securities  
07/24/2019
3:47 PM
JFL Capital Management, LLC (Filed by)
Merrimack Pharmaceuticals (Subject)
Form SC 13D/A
07/18/2019
6:38 PM
Aryeh Jason (Reporting)
Merrimack Pharmaceuticals (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
07/17/2019
7:17 AM
Merrimack Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
07/17/2019
6:01 AM
Merrimack Pharmaceuticals (Filer)
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
07/15/2019
3:32 PM
Aryeh Jason (Reporting)
Merrimack Pharmaceuticals (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
07/12/2019
4:00 PM
Merrimack Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
07/02/2019
6:01 PM
JFL Capital Holdings LLC (Reporting)
JFL Capital Management LP (Reporting)
JFL Capital Management, LLC (Reporting)
JFL Partners Fund LP (Reporting)
Lawler Joseph F. (Reporting)
Merrimack Pharmaceuticals (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
07/01/2019
3:13 PM
Merrimack Pharmaceuticals (Filer)
Form 8-K/A
07/01/2019
3:11 PM
Merrimack Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
07/01/2019
6:09 AM
Merrimack Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
06/24/2019
3:26 PM
Merrimack Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
05/30/2019
3:16 PM
Merrimack Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
05/13/2019
3:00 PM
Merrimack Pharmaceuticals (Subject)
Newtyn Management, LLC (Filed by)
Form SC 13G/A
05/10/2019
7:31 AM
Merrimack Pharmaceuticals (Filer)
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
05/10/2019
6:45 AM
Merrimack Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
05/10/2019
6:39 AM
Merrimack Pharmaceuticals (Issuer)
Peters Richard (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
04/30/2019
3:15 PM
Merrimack Pharmaceuticals (Filer)
Form 10-K/A
04/30/2019
6:34 AM
Merrimack Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
04/17/2019
7:15 PM
22NW Fund GP, LLC (Reporting)
22NW Fund, LP (Reporting)
22NW, LP (Reporting)
English Aron R. (Reporting)
Merrimack Pharmaceuticals (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
04/17/2019
4:17 PM
JFL Capital Management, LLC (Filed by)
Merrimack Pharmaceuticals (Subject)
Form SC 13D/A
04/16/2019
3:15 PM
Merrimack Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
04/09/2019
5:39 PM
22NW Fund GP, LLC (Reporting)
22NW Fund, LP (Reporting)
22NW, LP (Reporting)
English Aron R. (Reporting)
Merrimack Pharmaceuticals (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
04/09/2019
5:30 PM
JFL Capital Holdings LLC (Reporting)
JFL Capital Management LP (Reporting)
JFL Capital Management, LLC (Reporting)
JFL Partners Fund LP (Reporting)
Lawler Joseph F. (Reporting)
Merrimack Pharmaceuticals (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
03/20/2019
6:46 PM
Lin Kenneth (Reporting)
Merrimack Pharmaceuticals (Issuer)
Form 3
Initial statement of beneficial ownership of securities  
03/20/2019
6:44 PM
Aryeh Jason (Reporting)
Merrimack Pharmaceuticals (Issuer)
Form 3
Initial statement of beneficial ownership of securities  
03/20/2019
6:41 PM
22NW Fund GP, LLC (Reporting)
22NW Fund, LP (Reporting)
22NW, LP (Reporting)
English Aron R. (Reporting)
Merrimack Pharmaceuticals (Issuer)
Form 3
Initial statement of beneficial ownership of securities  
03/20/2019
6:38 PM
JFL Capital Holdings LLC (Reporting)
JFL Capital Management LP (Reporting)
JFL Capital Management, LLC (Reporting)
JFL Partners Fund LP (Reporting)
Lawler Joseph F. (Reporting)
Merrimack Pharmaceuticals (Issuer)
Form 3
Initial statement of beneficial ownership of securities  
03/14/2019
8:00 AM
JFL Capital Management, LLC (Filed by)
Merrimack Pharmaceuticals (Subject)
Form SC 13D/A
03/06/2019
6:46 AM
Merrimack Pharmaceuticals (Filer)
Form S-8
Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans  
03/06/2019
6:32 AM
Merrimack Pharmaceuticals (Filer)
Form 10-K
Annual report pursuant to Section 13 or 15(d)  
03/06/2019
6:14 AM
Merrimack Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
02/14/2019
3:37 PM
BIOTECHNOLOGY VALUE FUND L P (Filed by)
Merrimack Pharmaceuticals (Subject)
Form SC 13G/A
02/08/2019
3:01 PM
22NW, LP (Filed by)
Merrimack Pharmaceuticals (Subject)
Form SC 13G
12/19/2018
3:10 PM
JFL Capital Management, LLC (Filed by)
Merrimack Pharmaceuticals (Subject)
Form SC 13D/A
12/13/2018
3:20 PM
Merrimack Pharmaceuticals (Issuer)
Santillana Sergio L. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
12/13/2018
3:18 PM
Merrimack Pharmaceuticals (Issuer)
Peters Richard (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
12/13/2018
3:17 PM
Merrimack Pharmaceuticals (Issuer)
Munsie Jeffrey A (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
12/13/2018
3:16 PM
Franchi Jean M. (Reporting)
Merrimack Pharmaceuticals (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
12/13/2018
3:15 PM
Drummond Daryl C (Reporting)
Merrimack Pharmaceuticals (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
11/07/2018
8:01 AM
Merrimack Pharmaceuticals (Filer)
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
11/07/2018
6:19 AM
Merrimack Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
11/02/2018
4:15 PM
JFL Capital Management, LLC (Filed by)
Merrimack Pharmaceuticals (Subject)
Form SC 13D
08/07/2018
7:01 AM
Merrimack Pharmaceuticals (Filer)
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
08/07/2018
6:13 AM
Merrimack Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
07/10/2018
7:26 AM
BlackRock Inc. (Filed by)
Merrimack Pharmaceuticals (Subject)
Form SC 13G/A
07/03/2018
7:33 AM
Merrimack Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
06/15/2018
3:34 PM
Merrimack Pharmaceuticals (Issuer)
RAY RUSSELL T (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/15/2018
3:34 PM
Merrimack Pharmaceuticals (Issuer)
Quigley James H. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/15/2018
3:33 PM
Merrimack Pharmaceuticals (Issuer)
Nielsen Ulrik B. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/15/2018
3:32 PM
Dineen John M. (Reporting)
Merrimack Pharmaceuticals (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
06/15/2018
3:32 PM
Demetri George (Reporting)
Merrimack Pharmaceuticals (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
06/15/2018
3:31 PM
CROCKER GARY L (Reporting)
Merrimack Pharmaceuticals (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
06/15/2018
3:15 PM
Merrimack Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
05/10/2018
9:50 AM
FMR LLC (Filed by)
Merrimack Pharmaceuticals (Subject)
Form SC 13G/A
05/08/2018
9:40 AM
Merrimack Pharmaceuticals (Filer)
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
05/08/2018
6:38 AM
Merrimack Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
04/27/2018
11:09 AM
Merrimack Pharmaceuticals (Filer)
Form DEFA14A
04/27/2018
11:03 AM
Merrimack Pharmaceuticals (Filer)
Form DEF 14A
This page was last updated on 6/2/2020 by MarketBeat.com Staff

Enter your email address below to receive a concise daily summary of analysts' upgrades, downgrades and new coverage with MarketBeat.com's FREE daily email newsletter.