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 JS
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Detailed Insider History for:
AVIDITY BIOSCIENCES INC: RNA
Price: 12/19/25 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
$72.34 $72.61 $21.51 $10,900 151 4,779 0.0% 5.9% 104.51% 4.08%
Exch Sector Industry Sub-Industry
NasdaqGM 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
    
 
BOYCE SARAH
PR,CEO,DIR
JS
$1,131,378
44,901
12/17/25
12/18/25
---
$71.87
291,970
-13.3
D
R
12/19/25 - 8:27:38 am
2
    
 
CALDERARO CHARLES III
CTO
JS
$699,008
9,726
---
12/17/25
---
$71.87
53,524
-15.4
D
R
12/19/25 - 8:30:49 am
3
    
 
CALDERARO CHARLES III
CTO
JB
---
23,250
---
12/17/25
---
---
63,250
58.1
D
R
12/19/25 - 8:30:49 am
4
    
 
FLANAGAN W MICHAEL
O
JS
$984,260
13,695
---
12/17/25
---
$71.87
94,000
-12.7
D
R
12/19/25 - 8:30:03 am
5
    
 
FLANAGAN W MICHAEL
O
JB
---
27,500
---
12/17/25
---
---
107,695
34.3
D
R
12/19/25 - 8:30:03 am
6
    
 
MOSBROOKER ERIC
O
JS
$3,449,041
47,990
---
12/17/25
---
$71.87
79,010
-37.8
D
R
12/19/25 - 8:29:16 am
7
    
 
MOSBROOKER ERIC
O
JB
---
72,000
---
12/17/25
---
---
127,000
130.9
D
R
12/19/25 - 8:29:16 am
8
    
 
BOYCE SARAH
PR,CEO,DIR
JB
---
31,000
---
12/17/25
---
---
336,871
10.1
D
R
12/19/25 - 8:27:38 am
9
    
 
MORIARTY JOHN B
LO
JS
$1,927,841
26,824
---
12/17/25
---
$71.87
76,931
-25.9
D
R
12/19/25 - 8:26:08 am
10
    
 
MORIARTY JOHN B
LO
JB
---
56,000
---
12/17/25
---
---
103,755
117.3
D
R
12/19/25 - 8:26:08 am
11
    
 
GALLAGHER KATHLEEN P
O
JS
$2,972,975
41,366
---
12/17/25
---
$71.87
80,838
-33.8
D
R
12/19/25 - 8:24:01 am
12
    
 
GALLAGHER KATHLEEN P
O
JB
---
72,000
---
12/17/25
---
---
122,204
143.4
D
R
12/19/25 - 8:24:01 am
13
    
 
MCCARTHY TERESA
HR
JS
$1,243,207
17,298
---
12/17/25
---
$71.87
118,832
-12.7
D
R
12/19/25 - 8:22:57 am
14
    
 
MCCARTHY TERESA
HR
JB
---
39,000
---
12/17/25
---
---
136,130
40.2
D
R
12/19/25 - 8:22:57 am
15
9m
2
0%
97%
2
HUGHES STEVEN GEORGE
O
OS
$105,015
2,209
---
10/22/25
---
$47.54
38,867
-5.4
D
10b
10/24/25 - 4:56:40 pm
16
    
 
HUGHES STEVEN GEORGE
O
OE
$22,443
2,209
---
10/22/25
---
$10.16
41,076
5.7
D
10b
10/24/25 - 4:56:40 pm
17
    
 
MCCARTHY TERESA
HR
OS
$1,003,058
20,000
---
10/15/25
---
$50.15
97,130
-17.1
D
10b
10/17/25 - 4:27:05 pm
18
    
 
MCCARTHY TERESA
HR
OE
$446,800
20,000
---
10/15/25
---
$22.34
117,130
20.6
D
10b
10/17/25 - 4:27:05 pm
19
    
 
MOSBROOKER ERIC
O
OS
$297,771
6,562
---
10/3/25
---
$45.38
55,000
-10.7
D
10b
10/7/25 - 4:11:08 pm
20
    
 
MOSBROOKER ERIC
O
OE
$59,386
6,562
---
10/3/25
---
$9.05
61,562
11.9
D
10b
10/7/25 - 4:11:08 pm
21
9m
2
0%
97%
2
HUGHES STEVEN GEORGE
O
OS
$89,601
2,208
---
9/22/25
---
$40.58
38,867
-5.4
D
10b
9/23/25 - 4:57:37 pm
22
    
 
HUGHES STEVEN GEORGE
O
OE
$22,433
2,208
---
9/22/25
---
$10.16
41,075
5.7
D
10b
9/23/25 - 4:57:37 pm
23
    
 
MCCARTHY TERESA
HR
OS
$621,143
15,000
---
9/15/25
---
$41.41
97,130
-13.4
D
10b
9/17/25 - 4:03:37 pm
24
    
 
MCCARTHY TERESA
HR
OE
$335,100
15,000
---
9/15/25
---
$22.34
112,130
15.4
D
10b
9/17/25 - 4:03:37 pm
25
9m
2
0%
97%
2
HUGHES STEVEN GEORGE
O
OS
$70,022
1,542
---
9/15/25
---
$45.41
38,867
-3.8
D
10b
9/17/25 - 4:02:14 pm
26
    
 
HUGHES STEVEN GEORGE
O
OE
$10,131
1,542
---
9/15/25
---
$6.57
40,409
4.0
D
10b
9/17/25 - 4:02:14 pm
27
    
 
FLANAGAN W MICHAEL
O
OS
$778,702
20,000
---
9/11/25
---
$38.94
80,195
-20.0
D
10b
9/12/25 - 4:07:49 pm
28
    
 
FLANAGAN W MICHAEL
O
OE
$284,400
20,000
---
9/11/25
---
$14.22
100,195
24.9
D
10b
9/12/25 - 4:07:49 pm
29
3m
3
0%
52%
3
WILSON TROY EDWARD
DIR
OS
$1,475,000
29,500
---
9/5/25
---
$50.00
54,425
-35.2
D
10b
9/9/25 - 5:53:21 pm
30
    
 
WILSON TROY EDWARD
DIR
OE
$180,960
14,500
---
9/5/25
---
$12.48
83,925
20.9
D
10b
9/9/25 - 5:53:21 pm
31
1y
15
47%
15%
5
BOYCE SARAH
PR,CEO,DIR
OS
$2,497,435
50,000
---
9/5/25
---
$49.95
305,871
-14.1
D
10b
9/5/25 - 6:56:01 pm
32
    
 
BOYCE SARAH
PR,CEO,DIR
OE
$62,000
50,000
---
9/5/25
---
$1.24
355,871
16.3
D
10b
9/5/25 - 6:56:01 pm
33
    
 
MOSBROOKER ERIC
O
OS
$308,936
6,563
---
9/3/25
---
$47.07
55,000
-10.7
D
10b
9/5/25 - 6:32:51 pm
34
    
 
MOSBROOKER ERIC
O
OE
$59,395
6,563
---
9/3/25
---
$9.05
61,563
11.9
D
10b
9/5/25 - 6:32:51 pm
35
    
 
GALLAGHER KATHLEEN P
O
AS
$8,915
188
---
9/2/25
---
$47.42
50,204
-0.4
D
10b
9/2/25 - 8:30:31 pm
36
1y
15
47%
15%
5
BOYCE SARAH
PR,CEO,DIR
OS
$1,234,700
25,000
---
8/28/25
---
$49.39
305,871
-7.6
D
10b
8/29/25 - 4:28:35 pm
37
    
 
BOYCE SARAH
PR,CEO,DIR
OE
$31,000
25,000
---
8/28/25
---
$1.24
330,871
8.2
D
10b
8/29/25 - 4:28:35 pm
38
9m
2
0%
97%
2
HUGHES STEVEN GEORGE
O
OS
$102,462
2,208
---
8/22/25
---
$46.40
38,867
-5.4
D
10b
8/22/25 - 5:20:01 pm
39
    
 
HUGHES STEVEN GEORGE
O
OE
$22,433
2,208
---
8/22/25
---
$10.16
41,075
5.7
D
10b
8/22/25 - 5:20:01 pm
40
    
 
MCCARTHY TERESA
HR
OS
$465,632
10,000
---
8/15/25
---
$46.56
97,130
-9.3
D
10b
8/15/25 - 5:50:29 pm
41
    
 
MCCARTHY TERESA
HR
OE
$223,400
10,000
---
8/15/25
---
$22.34
107,130
10.3
D
10b
8/15/25 - 5:50:29 pm
42
9m
2
0%
97%
2
HUGHES STEVEN GEORGE
O
OS
$71,950
1,542
---
8/13/25
---
$46.66
38,867
-3.8
D
10b
8/15/25 - 4:07:19 pm
43
    
 
HUGHES STEVEN GEORGE
O
OE
$10,131
1,542
---
8/13/25
---
$6.57
40,409
4.0
D
10b
8/15/25 - 4:07:19 pm
44
1y
8
38%
46%
2
MACLEAN MICHAEL F
CFO
AS
$1,320,844
30,914
---
8/6/25
---
$42.73
65,806
-32.0
D
10b
8/15/25 - 4:09:38 pm
45
    
 
MOSBROOKER ERIC
O
OS
$5,763,697
130,807
---
8/6/25
---
$44.06
55,000
-70.4
D
10b
8/8/25 - 5:45:20 pm
46
    
 
MOSBROOKER ERIC
O
OE
$1,128,417
124,687
---
8/6/25
---
$9.05
185,807
204.0
D
10b
8/8/25 - 5:45:20 pm
47
3m
3
0%
52%
3
WILSON TROY EDWARD
DIR
OS
$2,949,930
65,554
---
8/6/25
---
$45.00
17,776
-78.7
I
10b
8/8/25 - 5:42:43 pm
48
3m
3
0%
52%
3
WILSON TROY EDWARD
DIR
OS
$1,327,500
29,500
---
8/6/25
---
$45.00
69,425
-29.8
D
10b
8/8/25 - 5:42:43 pm
49
    
 
WILSON TROY EDWARD
DIR
OE
$358,260
29,500
---
8/6/25
$12.03
$12.48
91,425
47.6
D
10b
8/8/25 - 5:42:43 pm
50
1y
23
61%
-6%
3
LEVIN ARTHUR A
DIR
OS
$5,118,881
107,500
---
8/6/25
---
$47.62
19,650
-84.5
D
10b
8/8/25 - 5:41:14 pm
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