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Detailed Insider History for:
TWIST BIOSCIENCE CORP: TWST
Price: 6/5/26 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
$69.22 $73.70 $23.30 $4,310 62 1,339 0.0% 34.2% 123.93% 1.26%
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
    
 
CHO DENNIS
O
S
$28,077
402
---
6/8/26
---
$69.84
119,692
-0.3
D
R
6/10/26 - 4:05:51 pm
2
    
 
GREEN PAULA
VP,HR
S
$61,742
884
---
6/8/26
---
$69.84
120,705
-0.7
D
R
6/10/26 - 4:05:35 pm
3
    
 
LEPROUST EMILY M
CEO,DIR
S
$158,197
2,265
---
6/8/26
---
$69.84
844,607
-0.3
D
R
6/10/26 - 4:05:20 pm
4
    
 
WERNER ROBERT F
CAO
S
$94,046
1,359
---
6/8/26
---
$69.07
46,827
-2.8
D
R
6/10/26 - 4:05:02 pm
5
    
 
WERNER ROBERT F
CAO
JS
---
500
---
6/8/26
---
---
46,327
-1.1
D
R
6/10/26 - 4:05:02 pm
6
    
 
CHO DENNIS
O
AS
$990,799
14,205
---
5/29/26
---
$69.75
120,094
-10.6
D
10b
6/2/26 - 4:05:31 pm
7
    
 
LAPONIS ADAM
CFO
AS
$280,000
4,000
---
5/29/26
---
$70.00
112,675
-3.4
D
10b
6/2/26 - 4:05:30 pm
8
    
 
LEPROUST EMILY M
CEO,DIR
OS
$1,118,555
16,470
---
5/28/26
$65.33
$68.61
846,872
-1.9
D
10b
6/1/26 - 4:05:09 pm
9
    
 
LEPROUST EMILY M
CEO,DIR
OE
$145,265
16,470
---
5/28/26
---
$8.82
863,342
1.9
D
10b
6/1/26 - 4:05:09 pm
10
    
 
STAROVASNIK MELISSA A
DIR
AS
$170,000
2,500
---
5/28/26
---
$68.00
22,222
-10.1
D
10b
6/1/26 - 4:05:05 pm
11
    
 
LEPROUST EMILY M
CEO,DIR
OS
$3,213,653
49,299
5/26/26
5/27/26
$65.08
$66.28
846,872
-5.5
D
10b
5/28/26 - 4:05:13 pm
12
    
 
LEPROUST EMILY M
CEO,DIR
OE
$434,817
49,299
5/26/26
5/27/26
---
$8.82
871,889
6.0
D
10b
5/28/26 - 4:05:13 pm
13
    
 
STAROVASNIK MELISSA A
DIR
AS
$30,520
500
---
5/26/26
---
$61.04
24,722
-2.0
D
10b
5/28/26 - 4:05:21 pm
14
    
 
WERNER ROBERT F
CAO
S
$49,987
800
---
5/26/26
---
$62.48
48,186
-1.6
D
R
5/28/26 - 4:05:09 pm
15
    
 
GREEN PAULA
VP,HR
S
$74,507
1,399
---
5/21/26
---
$53.26
121,589
-1.1
D
R
5/26/26 - 4:05:27 pm
16
1y
51
61%
37%
1
FINN PATRICK JOHN
PR,COO
S
$221,549
4,160
---
5/21/26
---
$53.26
274,804
-1.5
D
R
5/26/26 - 4:05:23 pm
17
    
 
CHO DENNIS
O
S
$87,448
1,642
---
5/21/26
---
$53.26
134,299
-1.2
D
R
5/26/26 - 4:05:19 pm
18
    
 
WERNER ROBERT F
CAO
S
$36,641
688
---
5/21/26
---
$53.26
48,986
-1.4
D
R
5/26/26 - 4:05:16 pm
19
    
 
LEPROUST EMILY M
CEO,DIR
S
$366,834
6,888
---
5/21/26
---
$53.26
846,872
-0.8
D
R
5/26/26 - 4:05:15 pm
20
    
 
LAPONIS ADAM
CFO
S
$107,526
2,019
---
5/21/26
---
$53.26
116,675
-1.7
D
R
5/26/26 - 4:05:13 pm
21
    
 
JOHANNESSEN JAN
DIR
OS
$673,440
12,000
---
5/12/26
---
$56.12
17,754
-40.3
D
---
5/14/26 - 4:05:09 pm
22
    
 
JOHANNESSEN JAN
DIR
OE
$168,000
12,000
---
5/12/26
---
$14.00
29,754
67.6
D
---
5/14/26 - 4:05:09 pm
23
    
 
WERNER ROBERT F
CAO
S
$282,187
4,961
---
5/8/26
---
$56.88
49,674
-9.1
D
---
5/12/26 - 4:05:15 pm
24
    
 
CHO DENNIS
O
S
$112,126
1,962
---
5/4/26
---
$57.15
135,941
-1.4
D
R
5/6/26 - 4:05:17 pm
25
    
 
LEPROUST EMILY M
CEO,DIR
S
$293,002
5,127
---
5/4/26
---
$57.15
853,760
-0.6
D
R
5/6/26 - 4:05:15 pm
26
    
 
GREEN PAULA
VP,HR
S
$63,778
1,116
---
5/4/26
---
$57.15
122,988
-0.9
D
R
5/6/26 - 4:05:13 pm
27
1y
51
61%
37%
1
FINN PATRICK JOHN
PR,COO
S
$162,531
2,844
---
5/4/26
---
$57.15
278,964
-1.0
D
R
5/6/26 - 4:05:13 pm
28
    
 
WERNER ROBERT F
CAO
S
$9,372
164
---
5/4/26
---
$57.15
54,635
-0.3
D
R
5/6/26 - 4:05:10 pm
29
    
 
STAROVASNIK MELISSA A
DIR
AS
$30,915
500
---
4/27/26
---
$61.83
25,222
-1.9
D
10b
4/29/26 - 4:05:16 pm
30
1y
51
61%
37%
1
FINN PATRICK JOHN
PR,COO
S
$141,026
2,321
---
4/23/26
---
$60.76
281,808
-0.8
D
R
4/27/26 - 4:05:14 pm
31
    
 
LEPROUST EMILY M
CEO,DIR
OS
$630,957
9,671
4/21/26
4/22/26
$65.01
$66.00
858,887
-1.1
D
10b
4/23/26 - 4:05:09 pm
32
    
 
LEPROUST EMILY M
CEO,DIR
OE
$85,298
9,671
4/21/26
4/22/26
---
$8.82
866,948
1.1
D
10b
4/23/26 - 4:05:09 pm
33
    
 
LAPONIS ADAM
CFO
AS
$240,000
4,000
---
4/17/26
---
$60.00
118,694
-3.3
D
10b
4/21/26 - 4:05:10 pm
34
    
 
LAPONIS ADAM
CFO
AS
$165,000
3,000
---
4/14/26
---
$55.00
122,694
-2.4
D
10b
4/16/26 - 4:05:07 pm
35
    
 
LAPONIS ADAM
CFO
S
$129,562
2,597
---
4/9/26
---
$49.89
125,694
-2.0
D
R
4/13/26 - 4:05:14 pm
36
    
 
STAROVASNIK MELISSA A
DIR
AS
$51,000
1,000
---
4/1/26
---
$51.00
25,722
-3.7
D
10b
4/3/26 - 4:00:10 pm
37
    
 
CHO DENNIS
O
S
$15,500
354
---
3/20/26
---
$43.79
137,903
-0.3
D
R
3/24/26 - 4:05:12 pm
38
    
 
GREEN PAULA
VP,HR
S
$13,005
297
---
3/20/26
---
$43.79
124,104
-0.2
D
R
3/24/26 - 4:05:11 pm
39
    
 
LEPROUST EMILY M
CEO,DIR
S
$76,276
1,742
---
3/20/26
---
$43.79
858,887
-0.2
D
R
3/24/26 - 4:05:10 pm
40
1y
13
85%
-44%
2
CHESS ROBERT
DIR
OS
$470,000
10,000
---
3/17/26
---
$47.00
21,084
-32.2
D
10b
3/19/26 - 4:05:15 pm
41
    
 
CHESS ROBERT
DIR
OE
$118,900
10,000
---
3/17/26
---
$11.89
31,084
47.4
D
10b
3/19/26 - 4:05:15 pm
42
    
 
WERNER ROBERT F
CAO
S
$11,421
246
---
3/6/26
---
$46.43
54,799
-0.4
D
R
3/10/26 - 4:06:25 pm
43
    
 
CHO DENNIS
O
S
$19,731
425
---
3/6/26
---
$46.43
138,257
-0.3
D
R
3/10/26 - 4:05:15 pm
44
    
 
GREEN PAULA
VP,HR
S
$43,408
935
---
3/6/26
---
$46.43
124,401
-0.7
D
R
3/10/26 - 4:05:13 pm
45
    
 
LEPROUST EMILY M
CEO,DIR
S
$112,490
2,423
---
3/6/26
---
$46.43
860,629
-0.3
D
R
3/10/26 - 4:05:10 pm
46
1y
51
61%
37%
1
FINN PATRICK JOHN
PR,COO
S
$200,572
4,294
---
2/23/26
---
$46.71
284,129
-1.5
D
R
2/25/26 - 4:05:21 pm
47
    
 
WERNER ROBERT F
CAO
S
$79,080
1,693
---
2/23/26
---
$46.71
55,045
-3.0
D
R
2/25/26 - 4:05:19 pm
48
    
 
LAPONIS ADAM
CFO
S
$97,390
2,085
---
2/23/26
---
$46.71
128,291
-1.6
D
R
2/25/26 - 4:05:17 pm
49
    
 
LEPROUST EMILY M
CEO,DIR
S
$336,544
7,205
---
2/23/26
---
$46.71
863,052
-0.8
D
R
2/25/26 - 4:05:16 pm
50
    
 
GREEN PAULA
VP,HR
S
$68,430
1,465
---
2/23/26
---
$46.71
125,336
-1.2
D
R
2/25/26 - 4:05:13 pm
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