Merrimack Pharmaceuticals, Inc. (MACK) has 20 known insider and institutional holders on record. The largest holder is 22NW GP, Inc. with 1,241,896 shares. Other notable holders include 22NW, LP and Levy Noah G..
MACK Insider Ownership
Top Holder
22NW GP, Inc.
1,241,896 shares
Buys (12 mo)
0
$0.00 value
Sells (12 mo)
0
$0.00 value
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
22nw Gp, Inc. |
10 Percent Owner |
1,241,896 |
2019-07-25 |
|
| 2 |
22nw, Lp |
10 Percent Owner |
1,205,246 |
2019-04-17 |
|
| 3 |
Levy Noah G. |
Director |
1,119,586 |
2023-01-17 |
|
| 4 |
Ledo Capital, Llc |
Director |
754,108 |
2022-07-15 |
|
| 5 |
Andersen Eric |
Director |
533,151 |
2023-12-28 |
|
| 6 |
Jfl Capital Management, Llc |
10 Percent Owner |
499,194 |
2019-07-02 |
|
| 7 |
Needham Thomas E. Jr. |
Chief Business Officer |
450,000 |
2017-08-03 |
|
| 8 |
Mulroy Robert J. |
President and CEO |
250,000 |
2016-02-10 |
|
| 9 |
Peters Richard |
President and CEO |
225,000 |
2018-12-13 |
|
| 10 |
Stewart Edward J. |
Head of Commercial |
150,000 |
2016-02-10 |
|
| 11 |
Laivins Peter N |
Head of Development |
150,000 |
2016-02-10 |
|
| 12 |
Crocker Gary L |
See Remarks |
133,105 |
2023-08-14 |
|
| 13 |
Schoeberl Birgit M. |
Head of Discovery |
125,000 |
2016-02-10 |
|
| 14 |
Al-wakeel Yasir B. |
CFO and Head of Corp Dev |
105,000 |
2016-02-10 |
|
| 15 |
Khan Fazal R. |
SVP of Manufacturing |
75,000 |
2014-02-13 |
|
| 16 |
Sullivan William A. |
Principal Accounting Officer |
60,000 |
2016-02-10 |
|
| 17 |
Niyikiza Clet M. |
EVP of Development |
50,000 |
2013-03-13 |
|
| 18 |
Franchi Jean M. |
Chief Financial Officer |
45,000 |
2018-12-13 |
|
| 19 |
Santillana Sergio L. |
Chief Medical Officer |
45,000 |
2018-12-13 |
|
| 20 |
Drummond Daryl C |
Head of Research |
45,000 |
2018-12-13 |
|
No ownership data available for MACK.
