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 JS
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Detailed Insider History for:
ACUMEN PHARMACEUTICALS INC: ABOS
Price: 1/30/26 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
$2.60 $3.05 $0.86 $157 61 538 0.0% 1.3% 64.73% 7.32%
Exch Sector Industry Sub-Industry
NasdaqGS Manufacturing Chemicals And Allied Products Biological Products, (No Disgnostic Substances)
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Insider Statistics
T N H M S
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
    
 
MEISNER DEREK M
LO,SEC
OS
$53,280
17,756
1/26/26
1/28/26
---
$3.00
173,999
-9.3
D
10b
1/28/26 - 7:50:04 pm
2
    
 
MEISNER DEREK M
LO,SEC
OE
$32,849
17,756
1/26/26
1/28/26
---
$1.85
189,084
10.4
D
10b
1/28/26 - 7:50:04 pm
3
    
 
MEISNER DEREK M
LO,SEC
AS
$16,721
8,934
1/21/26
1/23/26
$1.81
$1.90
173,999
-4.9
D
10b
1/23/26 - 6:12:54 pm
4
    
 
SIEMERS ERIC
O
AS
$5,833
3,226
1/21/26
1/22/26
$1.80
$1.82
255,371
-1.2
D
10b
1/23/26 - 6:12:03 pm
5
1y
3
33%
-10%
2
ZUGA MATT
CFO
AS
$7,607
4,160
1/21/26
1/22/26
$1.81
$1.86
304,924
-1.3
D
10b
1/23/26 - 6:11:25 pm
6
    
 
OCONNELL DANIEL JOSEPH
CEO,DIR
AS
$21,993
12,035
1/21/26
1/22/26
$1.81
$1.88
881,275
-1.3
D
10b
1/23/26 - 6:10:48 pm
7
    
 
BARTON RUSSELL
COO
AS
$5,031
2,777
1/21/26
1/22/26
$1.81
$1.84
205,092
-1.3
D
10b
1/23/26 - 6:10:06 pm
8
    
 
OCONNELL DANIEL JOSEPH
CEO,DIR
JB
---
299,800
---
1/20/26
---
---
893,310
50.5
D
R
1/21/26 - 6:32:39 pm
9
    
 
ZUGA MATT
CFO
JB
---
99,133
---
1/16/26
---
---
309,084
47.2
D
R
1/21/26 - 6:32:05 pm
10
    
 
MEISNER DEREK M
LO,SEC
JB
---
99,133
---
1/16/26
---
---
182,933
118.3
D
R
1/21/26 - 6:31:39 pm
11
    
 
SIEMERS ERIC
O
JB
---
99,133
---
1/16/26
---
---
258,597
62.2
D
R
1/21/26 - 6:31:11 pm
12
    
 
BARTON RUSSELL
COO
JB
---
84,600
---
1/16/26
---
---
207,869
68.6
D
R
1/21/26 - 6:30:23 pm
13
    
 
SCHACTERLE AMY
LO
JB
---
84,600
---
1/16/26
---
---
92,303
1,098.3
D
R
1/21/26 - 6:29:51 pm
14
    
 
DOHERTY JAMES J
PR
JB
---
166,867
---
1/16/26
---
---
220,900
308.8
D
R
1/21/26 - 6:29:25 pm
15
    
 
MEISNER DEREK M
LO,SEC
AS
$91,073
50,659
1/8/26
1/12/26
---
$1.71
83,800
-37.7
D
10b
1/12/26 - 6:51:10 pm
16
    
 
OCONNELL DANIEL JOSEPH
CEO,DIR
AS
$46,954
26,472
1/8/26
1/12/26
---
$1.73
593,510
-4.3
D
10b
1/12/26 - 6:50:33 pm
17
1y
3
33%
-10%
2
ZUGA MATT
CFO
AS
$12,513
6,888
---
1/8/26
---
$1.82
209,951
-3.2
D
10b
1/12/26 - 6:52:52 pm
18
    
 
BARTON RUSSELL
COO
AS
$6,562
3,530
---
1/8/26
---
$1.86
123,269
-2.8
D
10b
1/12/26 - 6:52:20 pm
19
    
 
DOHERTY JAMES J
PR
AS
$15,148
8,167
1/7/26
1/8/26
---
$1.82
54,033
-13.1
D
10b
1/9/26 - 4:39:25 pm
20
    
 
SCHACTERLE AMY
LO
AS
$2,176
1,097
---
1/7/26
---
$1.98
7,703
-12.5
D
10b
1/9/26 - 4:38:43 pm
21
1y
3
33%
-10%
2
ZUGA MATT
CFO
AS
$29,436
14,905
1/5/26
1/7/26
$1.96
$1.99
216,839
-6.4
D
10b
1/7/26 - 9:31:50 pm
22
    
 
OCONNELL DANIEL JOSEPH
CEO,DIR
AS
$94,176
47,506
1/5/26
1/7/26
$1.97
$1.99
619,982
-7.1
D
10b
1/7/26 - 9:31:07 pm
23
    
 
MEISNER DEREK M
LO,SEC
AS
$52,690
26,668
1/5/26
1/7/26
$1.96
$1.99
134,459
-16.6
D
10b
1/7/26 - 9:30:43 pm
24
    
 
BARTON RUSSELL
COO
AS
$18,325
9,318
1/5/26
1/7/26
$1.96
$1.99
126,799
-6.8
D
10b
1/7/26 - 9:30:15 pm
25
    
 
SIEMERS ERIC
O
AS
$21,277
10,834
1/5/26
1/6/26
$1.96
$1.97
159,464
-6.4
D
10b
1/7/26 - 9:31:31 pm
26
    
 
GOLUMBESKI GEORGE
DIR
3
---
---
---
11/6/25
---
---
---
---
---
---
11/10/25 - 4:46:17 pm
27
    
 
RA CAPITAL MANAGEMENT L P
DIR,BO
JB
---
12,800
---
6/4/25
---
---
12,800
New
I
R
6/5/25 - 6:12:53 pm
28
    
 
STOPPEL LAURA
DIR
JB
---
12,800
---
6/4/25
---
---
12,800
New
D
R
6/5/25 - 6:05:34 pm
29
    
 
STALFORT JOHN A III
DIR
JB
---
12,800
---
6/4/25
---
---
185,124
7.4
D
R
6/5/25 - 4:59:03 pm
30
    
 
FOUNTAIN NATHAN B
DIR
JB
---
12,800
---
6/4/25
---
---
19,050
204.8
D
R
6/5/25 - 4:57:56 pm
31
    
 
DRAPKIN KIMBERLEE C
DIR
JB
---
12,800
---
6/4/25
---
---
12,800
New
D
R
6/5/25 - 4:57:43 pm
32
    
 
IVES JEFFREY L
DIR
JB
---
12,800
---
6/4/25
---
---
12,800
New
D
R
6/5/25 - 4:52:10 pm
33
    
 
PORTER DERRELL
DIR
JB
---
12,800
---
6/4/25
---
---
12,800
New
D
R
6/5/25 - 4:51:20 pm
34
1y
3
33%
-10%
2
ZUGA MATT
CFO
AS
$56,620
33,266
1/21/25
1/23/25
$1.60
$1.72
231,744
-12.6
D
10b
1/23/25 - 9:19:28 pm
35
    
 
OCONNELL DANIEL JOSEPH
CEO,DIR
AS
$20,102
12,619
---
1/21/25
---
$1.59
667,488
-1.9
D
10b
1/23/25 - 5:18:02 pm
36
    
 
MEISNER DEREK M
LO,SEC
AS
$5,435
3,418
---
1/21/25
---
$1.59
161,127
-2.1
D
10b
1/23/25 - 5:16:46 pm
37
    
 
BARTON RUSSELL
COO
AS
$4,692
2,914
---
1/21/25
---
$1.61
136,117
-2.1
D
10b
1/23/25 - 5:14:45 pm
38
    
 
SIEMERS ERIC
O
AS
$5,118
3,219
---
1/21/25
---
$1.59
170,298
-1.9
D
10b
1/23/25 - 5:06:50 pm
39
    
 
OCONNELL DANIEL JOSEPH
CEO,DIR
JB
---
225,400
---
1/7/25
---
---
680,107
49.6
D
10b
1/7/25 - 8:09:04 pm
40
    
 
SCHACTERLE AMY
LO
JB
---
8,800
---
1/6/25
---
---
8,800
New
D
R
1/7/25 - 8:02:56 pm
41
    
 
DOHERTY JAMES J
PR
JB
---
62,600
---
1/6/25
---
---
62,600
New
D
R
1/7/25 - 8:00:48 pm
42
    
 
MEISNER DEREK M
LO,SEC
JB
---
66,800
---
1/6/25
---
---
164,545
68.3
D
10b
1/7/25 - 7:57:37 pm
43
    
 
BARTON RUSSELL
COO
JB
---
49,800
---
1/6/25
---
---
139,031
55.8
D
10b
1/7/25 - 7:55:46 pm
44
    
 
ZUGA MATT
CFO
JB
---
66,800
---
1/6/25
---
---
265,010
33.7
D
10b
1/7/25 - 7:53:29 pm
45
    
 
SIEMERS ERIC
O
JB
---
66,800
---
1/6/25
---
---
173,517
62.6
D
10b
1/7/25 - 7:48:53 pm
46
    
 
OCONNELL DANIEL JOSEPH
CEO,DIR
AS
$87,873
47,778
---
1/3/25
---
$1.84
454,707
-9.5
D
10b
1/7/25 - 8:09:04 pm
47
    
 
MEISNER DEREK M
LO,SEC
AS
$20,506
11,122
---
1/3/25
---
$1.84
97,745
-10.2
D
10b
1/7/25 - 7:57:37 pm
48
    
 
BARTON RUSSELL
COO
AS
$14,225
7,636
---
1/3/25
---
$1.86
89,231
-7.9
D
10b
1/7/25 - 7:55:46 pm
49
1y
3
33%
-10%
2
ZUGA MATT
CFO
AS
$24,367
13,235
---
1/3/25
---
$1.84
198,210
-6.3
D
10b
1/7/25 - 7:53:29 pm
50
    
 
SIEMERS ERIC
O
AS
$20,047
10,859
---
1/3/25
---
$1.85
106,717
-9.2
D
10b
1/7/25 - 7:48:53 pm
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