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Transaction Types Key To InsiderInsights' Infobase
 B  AB  JB*  OB  OE*  OE
 S  AS  JS*  OS  OS*  3
 JB
 JS
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Detailed Insider History for:
MERRIMACK PHARMACEUTICALS INC: MACK
Price: 5/17/13 52-Wk
High		 52-Wk
Low		 Mkt Cap (mm) Shrs Out (mm) 3-Mth Ave
Vol (m)		 Ind. Yield Short Int
% Float		 Inst. Owned Insider Owned
$5.52 $11.11 $4.06 $530 96 345 0.0% 2.9% 42.21% 2.40%
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#:
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Filer Name
Insider Title
Trans Type
Dollar Value
Shares Traded
Trans Date From
Trans Date To
Trans Price From
Trans Price To
Total Holdings
Delta % Owned
Owned
Other Info
Input Date
1
MULROY ROBERT J
PR,CEO,DIR
OB
$109,500
50,000
---
5/6/13
---
$2.19
956,544
5.5
D
---
5/6/13 - 4:55:52 pm
2
STEWART EDWARD J
VP,PR
OB
$10,950
5,000
---
4/29/13
---
$2.19
21,385
30.5
D
---
4/30/13 - 4:34:01 pm
3
DRESSER JAMES VAN B
DIR
OB
$32,850
15,000
---
4/25/13
---
$2.19
143,974
11.6
D
---
4/26/13 - 5:18:23 pm
4
NIELSEN ULRIK B
VP
OS
$56,566
10,483
---
4/24/13
---
$5.40
176,811
-5.6
D
10b
4/26/13 - 5:18:03 pm
5
NIELSEN ULRIK B
VP
OE
$22,958
10,483
---
4/24/13
---
$2.19
187,294
5.9
D
10b
4/26/13 - 5:18:03 pm
6
SINSKEY ANTHONY J
DIR
OB
$32,850
15,000
---
4/24/13
---
$2.19
388,743
4.0
D
---
4/26/13 - 5:17:15 pm
7
FEHR GORDON J
DIR
OS
$90,645
15,000
---
4/15/13
---
$6.04
190,143
-7.3
D
10b
4/16/13 - 6:02:08 pm
8
FEHR GORDON J
DIR
OE
$32,850
15,000
---
4/15/13
---
$2.19
205,143
7.9
D
10b
4/16/13 - 6:02:08 pm
9
NIYIKIZA CLET M
VP
OB
$87,995
41,507
---
2/5/13
---
$2.12
141,507
41.5
D
---
2/6/13 - 12:15:28 pm
10
MULROY ROBERT J
PR,CEO,DIR
JB
---
7,443
---
1/4/13
---
---
848,254
0.9
D
---
2/13/13 - 10:00:56 am
11
MULROY ROBERT J
PR,CEO,DIR
JB
---
58,290
---
1/4/13
---
---
906,544
6.9
I
---
2/13/13 - 10:00:56 am
12
CROCKER GARY L
DIR
JS
---
129,090
---
12/19/12
---
---
2,441,241
-5.0
I
---
2/13/13 - 10:03:32 am
13
CROCKER GARY L
DIR
JB
---
69,030
---
12/19/12
---
---
2,531,331
2.8
I
---
2/13/13 - 10:03:32 am
14
NIYIKIZA CLET M
VP
OB
$212,000
100,000
---
12/18/12
---
$2.12
100,000
New
D
---
12/19/12 - 10:41:00 am
15
PORTER MICHAEL E
DIR
OB
$32,850
15,000
---
12/17/12
---
$2.19
277,865
5.7
D
---
12/18/12 - 2:25:17 pm
16
KHAN FAZAL R
VP
OS
$328,663
50,000
12/13/12
12/17/12
---
$6.41
---
All
D
---
12/17/12 - 5:10:30 pm
17
KHAN FAZAL R
VP
OE
$85,500
50,000
12/13/12
12/17/12
---
$1.71
25,000
---
D
---
12/17/12 - 5:10:30 pm
18
MENDELSOHN JOHN
DIR
B
$33,145
5,000
---
12/14/12
---
$6.63
5,000
New
D
---
12/18/12 - 2:25:31 pm
19
CROCKER GARY L
DIR
B
$247,215
36,500
---
12/13/12
---
$6.77
2,531,331
1.5
I
---
12/17/12 - 5:11:49 pm
20
PORTER MICHAEL E
DIR
B
$60,800
10,000
---
12/10/12
---
$6.08
262,865
4.0
D
---
12/12/12 - 4:19:42 pm
21
NIELSEN ULRIK B
VP
S
$552,750
75,000
---
12/3/12
---
$7.37
176,811
-29.8
D
---
12/4/12 - 4:06:35 pm
22
CROCKER GARY L
DIR
B
$539,609
64,800
---
9/14/12
$8.32
$8.34
2,494,831
2.7
I
---
9/18/12 - 9:30:21 am
23
SINSKEY ANTHONY J
DIR
JS
---
81,736
---
9/7/12
---
---
324,782
-20.1
I
---
2/13/13 - 10:09:59 am
24
SINSKEY ANTHONY J
DIR
JB
---
16,185
---
9/7/12
---
---
340,967
5.0
D
---
2/13/13 - 10:09:59 am
25
SINSKEY ANTHONY J
DIR
JB
---
32,776
---
9/7/12
---
---
373,743
9.6
I
---
2/13/13 - 10:09:59 am
26
QUIGLEY JAMES H
DIR
B
$94,360
12,500
---
8/24/12
$7.50
$7.55
12,500
New
D
---
8/27/12 - 2:06:13 pm
27
SINSKEY ANTHONY J
DIR
OB
$43,800
20,000
---
8/1/12
---
$2.19
406,518
5.2
D
---
8/2/12 - 7:26:09 am
28
DRESSER JAMES VAN B
DIR
OB
$43,800
20,000
---
7/24/12
---
$2.19
128,974
18.4
D
---
7/25/12 - 10:17:48 am
29
NIELSEN ULRIK B
VP
OB
$9,566
4,368
---
7/16/12
---
$2.19
251,811
1.8
D
---
7/17/12 - 2:54:03 pm
30
QUIGLEY JAMES H
DIR
3
---
---
---
7/12/12
---
---
---
---
---
---
7/17/12 - 1:27:55 pm
31
FEHR GORDON J
DIR
OB
$43,800
20,000
---
7/3/12
---
$2.19
190,143
11.8
D
---
7/5/12 - 8:39:17 am
32
MULROY ROBERT J
PR,CEO,DIR
OB
$164,250
75,000
---
6/15/12
---
$2.19
840,811
9.8
D
---
2/13/13 - 9:57:30 am
33
MULROY ROBERT J
PR,CEO,DIR
OB
$164,250
75,000
---
6/15/12
---
$2.19
680,819
12.4
D
---
6/19/12 - 9:05:59 am
34
MENDELSOHN JOHN
DIR
3
---
---
---
6/13/12
---
---
---
---
---
---
6/19/12 - 8:43:51 am
35
STEWART EDWARD J
VP,PR
OB
$35,883
16,385
---
4/27/12
---
$2.19
16,385
New
D
---
4/30/12 - 8:31:47 am
36
LOVENBERG WALTER M PHD
DIR
OB
$11,962
5,462
---
4/25/12
---
$2.19
84,033
7.0
D
A
5/1/12 - 8:26:13 am
37
LOVENBERG WALTER M PHD
DIR
OB
$11,962
5,462
---
4/25/12
---
$2.19
84,033
7.0
D
---
4/27/12 - 2:13:18 pm
38
SINSKEY ANTHONY J
DIR
OB
$11,962
5,462
---
4/19/12
---
$2.19
386,518
1.4
D
A
5/1/12 - 8:27:46 am
39
SINSKEY ANTHONY J
DIR
OB
$11,962
5,462
---
4/19/12
---
$2.19
386,518
1.4
D
---
4/20/12 - 7:02:34 am
40
FEHR GORDON J
DIR
OB
$11,962
5,462
---
4/17/12
---
$2.19
170,143
3.3
D
A
5/1/12 - 8:24:43 am
41
FEHR GORDON J
DIR
OB
$11,962
5,462
---
4/17/12
---
$2.19
170,143
3.3
D
---
4/18/12 - 4:26:48 pm
42
DRESSER JAMES VAN B
DIR
OB
$11,962
5,462
---
4/10/12
---
$2.19
108,974
5.3
D
A
5/1/12 - 8:23:27 am
43
DRESSER JAMES VAN B
DIR
OB
$11,962
5,462
---
4/10/12
---
$2.19
108,974
5.3
D
---
4/13/12 - 3:11:21 pm
44
MULROY ROBERT J
PR,CEO,DIR
JB
---
159,992
---
4/3/12
---
---
765,811
26.4
I
---
2/13/13 - 9:57:30 am
45
SINSKEY ANTHONY J
DIR
JB*
$49,994
7,142
---
4/3/12
---
$7.00
326,309
2.2
D
---
4/5/12 - 4:23:51 pm
46
SINSKEY ANTHONY J
DIR
JB
---
36,723
---
4/3/12
---
---
363,032
11.3
D
---
4/5/12 - 4:23:51 pm
47
SINSKEY ANTHONY J
DIR
JB
---
18,024
---
4/3/12
---
---
381,056
5.0
I
---
4/5/12 - 4:23:51 pm
48
PORTER MICHAEL E
DIR
JB*
$87,500
12,500
---
4/3/12
---
$7.00
75,500
19.8
D
---
4/5/12 - 4:22:27 pm
49
PORTER MICHAEL E
DIR
JB
---
177,365
---
4/3/12
---
---
252,865
234.9
D
---
4/5/12 - 4:22:27 pm
50
NASH SARAH E
DIR
JB
---
330,822
---
4/3/12
---
---
929,494
55.3
I
---
4/5/12 - 4:21:14 pm
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