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Detailed Insider History for:
IONIS PHARMACEUTICALS INC: IONS
Price: 7/24/26 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
$56.55 $86.74 $40.03 $9,346 165 2,740 0.0% 16.1% 107.19% 0.61%
Exch Sector Industry Sub-Industry
NasdaqGS Manufacturing Chemicals And Allied Products Pharmaceutical Preparations
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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
    
 
HERMAN JOAN E
DIR
JB
---
5,220
---
7/15/26
---
---
51,306
11.3
D
R
7/17/26 - 5:12:37 pm
2
    
 
BERTHELSEN SPENCER R
DIR
JB
---
5,220
---
7/15/26
---
---
161,233
3.3
D
R
7/17/26 - 5:12:26 pm
3
1y
31
45%
-2%
1
BENNETT C FRANK
VP
AS
$462,693
5,536
---
7/7/26
---
$83.58
75,018
-6.9
D
R,10b
7/9/26 - 7:26:31 pm
4
1y
31
45%
-2%
1
BENNETT C FRANK
VP
AS
$1,281,930
15,000
---
7/7/26
---
$85.46
---
All
I
R,10b
7/9/26 - 7:26:31 pm
5
    
 
BENNETT C FRANK
VP
JB
---
15,000
---
7/7/26
---
---
15,000
New
I
R,10b
7/9/26 - 7:26:31 pm
6
    
 
DIAZ ALLENE M
DIR
OS
$863,637
10,111
---
7/7/26
---
$85.42
3,811
-72.6
D
10b
7/9/26 - 6:07:56 pm
7
    
 
DIAZ ALLENE M
DIR
OE
$476,329
10,111
---
7/7/26
---
$47.11
13,922
265.3
D
10b
7/9/26 - 6:07:56 pm
8
    
 
KORDASIEWICZ HOLLY B
VP
AS
$30,517
362
---
7/7/26
---
$84.30
22,096
-1.6
D
10b
7/9/26 - 6:07:45 pm
9
1y
25
72%
-33%
8
KLEIN JOSEPH III
DIR
OS
$910,416
11,518
---
7/1/26
---
$79.04
11,014
-51.1
D
R,10b
7/6/26 - 6:49:29 pm
10
    
 
KLEIN JOSEPH III
DIR
OE
$460,029
11,518
---
7/1/26
---
$39.94
22,532
104.6
D
R,10b
7/6/26 - 6:49:29 pm
11
    
 
BAROLDI JOSEPH
VP
OS
$451,699
5,635
---
6/26/26
---
$80.16
4,669
-54.7
I
10b
6/30/26 - 5:48:32 pm
12
    
 
BAROLDI JOSEPH
VP
OE
$277,181
5,635
---
6/26/26
---
$32.60
10,304
120.7
I
10b
6/30/26 - 5:48:32 pm
13
1y
42
76%
-45%
1
O NEIL PATRICK R
VP,LO,GC
AS
$245,520
3,069
---
6/26/26
---
$80.00
61,470
-4.8
D
10b
6/30/26 - 5:48:21 pm
14
    
 
SCHNEIDER EUGENE
VP
OS
$2,107,196
26,000
---
6/26/26
---
$81.05
77,114
-25.2
D
10b
6/30/26 - 5:48:12 pm
15
    
 
SCHNEIDER EUGENE
VP
OE
$1,583,140
26,000
---
6/26/26
---
$60.89
103,114
33.7
D
10b
6/30/26 - 5:48:12 pm
16
1y
38
63%
-19%
1
MONIA BRETT P
CEO,DIR
OS
$6,825,524
85,637
6/24/26
6/26/26
$78.41
$80.59
245,571
-25.9
D
10b
6/26/26 - 7:09:50 pm
17
    
 
MONIA BRETT P
CEO,DIR
OE
$4,000,766
85,637
6/24/26
6/26/26
$32.60
$56.78
295,571
40.8
D
10b
6/26/26 - 7:09:50 pm
18
    
 
SWAYZE ERIC
VP
AS
$839,492
10,602
---
6/25/26
---
$79.18
21,759
-32.8
D
10b
6/26/26 - 7:09:43 pm
19
1y
7
43%
35%
1
BERTHELSEN SPENCER R
DIR
OS
$587,920
8,000
---
6/15/26
---
$73.49
156,013
-4.9
D
10b
6/16/26 - 5:26:11 pm
20
    
 
BERTHELSEN SPENCER R
DIR
OE
$195,360
8,000
---
6/15/26
---
$24.42
164,013
5.1
D
10b
6/16/26 - 5:26:11 pm
21
    
 
KORDASIEWICZ HOLLY B
VP
OS
$4,466,428
60,846
---
6/12/26
$73.09
$74.05
22,458
-73.0
D
10b
6/16/26 - 5:26:18 pm
22
    
 
KORDASIEWICZ HOLLY B
VP
OE
$3,283,665
60,846
---
6/12/26
$32.60
$56.78
83,304
270.9
D
10b
6/16/26 - 5:26:18 pm
23
    
 
REIKES PETER N
DIR
3
---
---
---
6/4/26
---
---
---
---
---
---
6/8/26 - 4:59:02 pm
24
    
 
HANTSON LUDWIG
DIR
3
---
---
---
6/4/26
---
---
---
---
---
---
6/8/26 - 4:58:41 pm
25
1y
7
43%
35%
1
BERTHELSEN SPENCER R
DIR
OS
$605,360
8,000
---
6/1/26
---
$75.67
156,013
-4.9
D
10b
6/3/26 - 5:34:36 pm
26
    
 
BERTHELSEN SPENCER R
DIR
OE
$195,360
8,000
---
6/1/26
---
$24.42
164,013
5.1
D
10b
6/3/26 - 5:34:36 pm
27
1y
38
63%
-19%
1
MONIA BRETT P
CEO,DIR
OS
$356,012
4,536
5/13/26
5/14/26
$78.01
$78.68
242,662
-1.8
D
10b
5/15/26 - 6:15:03 pm
28
    
 
MONIA BRETT P
CEO,DIR
OE
$147,874
4,536
5/13/26
5/14/26
---
$32.60
245,882
1.9
D
10b
5/15/26 - 6:15:03 pm
29
1y
1
0%
92%
2
LOSCALZO JOSEPH
DIR
OS
$5,801,226
77,289
---
5/4/26
$74.90
$75.58
36,330
-68.0
D
10b
5/6/26 - 5:27:00 pm
30
    
 
LOSCALZO JOSEPH
DIR
OE
$3,767,309
77,289
---
5/4/26
$38.06
$64.80
113,619
212.7
D
10b
5/6/26 - 5:27:00 pm
31
1y
25
72%
-33%
8
KLEIN JOSEPH III
DIR
OS
$743,238
10,111
---
5/1/26
$73.35
$74.45
11,014
-47.9
D
10b
5/5/26 - 4:30:25 pm
32
    
 
KLEIN JOSEPH III
DIR
OE
$476,329
10,111
---
5/1/26
---
$47.11
21,125
91.8
D
10b
5/5/26 - 4:30:25 pm
33
    
 
BAROLDI JOSEPH
VP
AS
$116,727
1,626
---
4/28/26
---
$71.79
44,909
-3.5
D
10b
4/30/26 - 4:21:24 pm
34
    
 
JENNE KYLE
VP
S
$368,488
4,902
---
4/16/26
---
$75.17
23,713
-17.1
D
R
4/17/26 - 7:19:32 pm
35
    
 
BIRCHLER BRIAN
VP,OO
S
$73,016
973
---
4/16/26
---
$75.04
67,500
-1.4
D
R
4/17/26 - 7:19:21 pm
36
    
 
BAROLDI JOSEPH
VP
S
$418,953
5,619
---
4/16/26
---
$74.56
46,535
-10.8
D
R
4/17/26 - 7:19:15 pm
37
1y
23
70%
-34%
3
PARSHALL B LYNNE
DIR
AS
$381,367
5,000
---
4/15/26
$76.19
$76.97
51,344
-8.9
D
10b
4/17/26 - 7:19:39 pm
38
    
 
JENNE KYLE
VP
JB
---
12,226
---
4/15/26
---
---
28,615
74.6
D
R
4/17/26 - 7:19:32 pm
39
    
 
BIRCHLER BRIAN
VP,OO
JB
---
1,875
---
4/15/26
---
---
68,473
2.8
D
R
4/17/26 - 7:19:21 pm
40
    
 
BAROLDI JOSEPH
VP
JB
---
10,837
---
4/15/26
---
---
52,154
26.2
D
R
4/17/26 - 7:19:15 pm
41
    
 
DEVERS SHANNON L
VP,HR
AS
$458,613
6,193
---
4/2/26
---
$74.05
16,348
-27.5
D
10b
4/2/26 - 7:43:36 pm
42
1y
25
72%
-33%
8
KLEIN JOSEPH III
DIR
OS
$1,686,302
22,321
---
4/1/26
$75.50
$75.95
11,014
-67.0
D
10b
4/2/26 - 7:43:46 pm
43
    
 
KLEIN JOSEPH III
DIR
OE
$880,707
22,321
---
4/1/26
$38.06
$41.08
33,335
202.7
D
10b
4/2/26 - 7:43:46 pm
44
    
 
SCHNEIDER EUGENE
VP
AS
$412,486
5,812
---
3/19/26
---
$70.97
63,890
-8.3
D
10b
3/23/26 - 7:36:40 pm
45
1y
24
67%
-37%
1
HOUGEN ELIZABETH L
VP,CFO
AS
$16,313,676
225,220
3/16/26
3/17/26
$72.38
$73.21
82,660
-73.2
D
10b
3/18/26 - 5:19:18 pm
46
    
 
HOUGEN ELIZABETH L
VP,CFO
OE
$8,989,092
174,999
---
3/16/26
$32.60
$37.58
307,880
131.7
D
10b
3/18/26 - 5:19:18 pm
47
1y
38
63%
-19%
1
MONIA BRETT P
CEO,DIR
OS
$12,114,155
160,773
3/9/26
3/10/26
$74.11
$76.34
242,662
-39.9
D
10b
3/11/26 - 4:19:03 pm
48
    
 
MONIA BRETT P
CEO,DIR
OE
$9,039,364
148,454
3/9/26
3/10/26
---
$60.89
369,332
67.2
D
10b
3/11/26 - 4:19:03 pm
49
    
 
JENNE KYLE
VP
OS
$2,827,325
37,277
---
3/10/26
$75.50
$76.30
11,714
-76.1
D
10b
3/11/26 - 4:18:53 pm
50
    
 
JENNE KYLE
VP
OE
$1,665,128
37,277
---
3/10/26
---
$34.69
48,991
318.2
D
10b
3/11/26 - 4:18:53 pm
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