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United States Pharmaceuticals

Twist Bioscience Corp (TWST)

Track

Over the last 90 days, Twist Bioscience Corp. has seen significant insider selling, with a net value of over $3.3 million. Executives contributed over $2.6 million to this net selling. Notable transactions include proposed and actual sales by officers Paula Green, Robert F. Werner, and Emily M. Leproust, totaling substantial amounts.
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Ticker: TWST Exchange: NSM
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings
Top insiders
Trades
Green Paula
SVP of Human Resources
3 sales — total 300,000 USD
Sale 15 Jun 2026
Value US$409,085.20 | Price 341.18 | Shares 38,689
Sale 15 Jun 2026
Value US$1,292,750.20 | Price 234.18 | Shares 52,055
Proposed sale 15 Jun 2026
Value US$100,000.00 | Price 81.67 | Shares 1,000
Sale 8 Jun 2026
Value US$4,348,344.04 | Price 95.39 | Shares 837
Sale 8 Jun 2026
Value US$1,998,954.12 | Price 182.56 | Shares 40,282
Sale 8 Jun 2026
Value US$100,000.00 | Price 69.84 | Shares 1,000
Proposed sale 8 Jun 2026
Value US$100,000.00 | Price 69.07 | Shares 1,000
Proposed sale 8 Jun 2026
Value US$100,000.00 | Price 69.84 | Shares 1,000
Proposed sale 8 Jun 2026
Value US$100,000.00 | Price 69.84 | Shares 1,000
Sale 8 Jun 2026
Value US$100,000.00 | Price 69.84 | Shares 1,000
Proposed sale 8 Jun 2026
Value US$100,000.00 | Price 69.84 | Shares 1,000
Proposed sale 8 Jun 2026
Value US$100,000.00 | Price 69.84 | Shares 1,000
Sale 8 Jun 2026
Value US$100,000.00 | Price 69.84 | Shares 1,000
Proposed sale 8 Jun 2026
Value US$100,000.00 | Price 69.84 | Shares 1,000
Sale 8 Jun 2026
Value US$100,000.00 | Price 69.84 | Shares 1,000
Proposed sale 8 Jun 2026
Value US$100,000.00 | Price 69.84 | Shares 1,000
Planned sale 29 May 2026
Value US$100,000.00 | Price 70.00 | Shares 1,000
Planned sale 29 May 2026
Value US$100,000.00 | Price 70.00 | Shares 1,000
Proposed sale 29 May 2026
Value US$280,000.00 | Price 70.00 | Shares 4,000
Planned sale 29 May 2026
Value US$100,000.00 | Price 69.75 | Shares 1,000
Planned sale 29 May 2026
Value US$100,000.00 | Price 69.75 | Shares 1,000
Proposed sale 29 May 2026
Value US$990,798.75 | Price 69.75 | Shares 14,205
Planned sale 28 May 2026
Value US$100,000.00 | Price 68.00 | Shares 1,000
Proposed sale 28 May 2026
Value US$170,000.00 | Price 68.00 | Shares 2,500
Planned sale 28 May 2026
Value US$100,000.00 | Price 68.61 | Shares 1,000
Planned sale 28 May 2026
Value US$100,000.00 | Price 67.95 | Shares 1,000
Planned sale 28 May 2026
Value US$100,000.00 | Price 66.85 | Shares 1,000
Planned sale 28 May 2026
Value US$100,000.00 | Price 65.33 | Shares 1,000
Proposed sale 28 May 2026
Value US$1,118,555.16 | Price 67.91 | Shares 16,470
Planned sale 27 May 2026
Value US$83,845.84 | Price 66.28 | Shares 1,265
Planned sale 27 May 2026
Value US$1,549,561.48 | Price 65.24 | Shares 23,752
Proposed sale 27 May 2026
Value US$1,633,407.23 | Price 65.29 | Shares 25,017
Planned sale 26 May 2026
Value US$30,520.00 | Price 61.04 | Shares 500
Proposed sale 26 May 2026
Value US$30,520.00 | Price 61.04 | Shares 500
Planned sale 26 May 2026
Value US$1,580,245.85 | Price 65.08 | Shares 24,282
Proposed sale 26 May 2026
Value US$1,580,246.60 | Price 65.08 | Shares 24,282
Sale 26 May 2026
Value US$49,987.20 | Price 62.48 | Shares 800
Proposed sale 26 May 2026
Value US$49,987.20 | Price 62.48 | Shares 800
Sale 21 May 2026
Value US$107,525.88 | Price 53.26 | Shares 2,019
Proposed sale 21 May 2026
Value US$107,525.08 | Price 53.26 | Shares 2,019
Proposed sale 21 May 2026
Value US$107,525.08 | Price 53.26 | Shares 2,019
Sale 21 May 2026
Value US$221,549.12 | Price 53.26 | Shares 4,160
Proposed sale 21 May 2026
Value US$221,547.45 | Price 53.26 | Shares 4,160
Sale 21 May 2026
Value US$36,640.82 | Price 53.26 | Shares 688
Proposed sale 21 May 2026
Value US$36,640.54 | Price 53.26 | Shares 688
Proposed sale 21 May 2026
Value US$36,640.54 | Price 53.26 | Shares 688
Sale 21 May 2026
Value US$74,506.54 | Price 53.26 | Shares 1,399
Proposed sale 21 May 2026
Value US$74,505.99 | Price 53.26 | Shares 1,399
Sale 21 May 2026
Value US$87,447.99 | Price 53.26 | Shares 1,642
Proposed sale 21 May 2026
Value US$87,447.34 | Price 53.26 | Shares 1,642
Sale 21 May 2026
Value US$366,834.22 | Price 53.26 | Shares 6,888
Proposed sale 21 May 2026
Value US$366,831.46 | Price 53.26 | Shares 6,888
Sale 12 May 2026
Value US$673,440.00 | Price 56.12 | Shares 12,000
Proposed sale 12 May 2026
Value US$673,440.00 | Price 56.12 | Shares 12,000
Sale 8 May 2026
Value US$282,186.64 | Price 56.88 | Shares 4,961
Proposed sale 8 May 2026
Value US$282,186.64 | Price 56.88 | Shares 4,961
Sale 4 May 2026
Value US$162,531.19 | Price 57.15 | Shares 2,844
Proposed sale 4 May 2026
Value US$162,531.19 | Price 57.15 | Shares 2,844
Sale 4 May 2026
Value US$112,125.95 | Price 57.15 | Shares 1,962
Proposed sale 4 May 2026
Value US$112,125.95 | Price 57.15 | Shares 1,962
Sale 4 May 2026
Value US$293,001.90 | Price 57.15 | Shares 5,127
Proposed sale 4 May 2026
Value US$293,001.90 | Price 57.15 | Shares 5,127
Sale 4 May 2026
Value US$63,778.06 | Price 57.15 | Shares 1,116
Proposed sale 4 May 2026
Value US$63,778.06 | Price 57.15 | Shares 1,116
Sale 4 May 2026
Value US$9,372.40 | Price 57.15 | Shares 164
Proposed sale 4 May 2026
Value US$9,372.40 | Price 57.15 | Shares 164
Planned sale 27 Apr 2026
Value US$30,915.00 | Price 61.83 | Shares 500
Proposed sale 27 Apr 2026
Value US$30,915.00 | Price 61.83 | Shares 500
Sale 23 Apr 2026
Value US$141,026.28 | Price 60.76 | Shares 2,321
Proposed sale 23 Apr 2026
Value US$141,026.51 | Price 60.76 | Shares 2,321
Planned sale 22 Apr 2026
Value US$9,966.00 | Price 66.00 | Shares 151
Planned sale 22 Apr 2026
Value US$516,325.25 | Price 65.28 | Shares 7,910
Proposed sale 22 Apr 2026
Value US$526,289.75 | Price 65.29 | Shares 8,061
Planned sale 21 Apr 2026
Value US$104,666.10 | Price 65.01 | Shares 1,610
Proposed sale 21 Apr 2026
Value US$104,665.00 | Price 65.01 | Shares 1,610
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-06-17 2026-06-15 S Sale
2.5
Green Paula

SVP of Human Resources

Officer
38,689 -34.0%
341.18
US$409,085 		38,689 -34.0% 341.18 US$409,085
2026-06-17 2026-06-15 S Sale
2.5
Green Paula

SVP of Human Resources

Officer
52,055 +10.3%
234.18
US$1,292,750 		52,055 +10.3% 234.18 US$1,292,750
2026-06-15 2026-06-15 PrS Proposed sale
2.5
Green Paula

Officer

Officer
44,053
483.59
US$3,695,466 		44,053 483.59 US$3,695,466
2026-06-10 2026-06-08 S Sale
2.3
WERNER ROBERT F.

Chief Accounting Officer

Officer
1,000 -2.4%
69.07
US$100,000 		1,000 -2.4% 69.07 US$100,000
2026-06-10 2026-06-08 S Sale
3.2
Leproust Emily M.

Chief Executive Officer

Executive Director
1,000 -0.3%
69.84
US$100,000 		1,000 -0.3% 69.84 US$100,000
2026-06-10 2026-06-08 S Sale
2.3
WERNER ROBERT F.

Chief Accounting Officer

Officer
1,000 -2.4%
69.07
US$100,000 		1,000 -2.4% 69.07 US$100,000
2026-06-10 2026-06-08 S Sale
2.3
WERNER ROBERT F.

Chief Accounting Officer

Officer
1,000 -0.5%
69.84
US$100,000 		1,000 -0.5% 69.84 US$100,000
2026-06-10 2026-06-08 S Sale
2.5
Green Paula

SVP of Human Resources

Officer
1,000 -0.7%
69.84
US$100,000 		1,000 -0.7% 69.84 US$100,000
2026-06-10 2026-06-08 S Sale
3.7
Cho Dennis

See Remarks

Officer
1,000 -0.3%
69.84
US$100,000 		1,000 -0.3% 69.84 US$100,000
2026-06-08 2026-06-08 PrS Proposed sale
2.3
WERNER ROBERT F.

Officer

Officer
1,000
69.07
US$100,000 		1,000 69.07 US$100,000
2026-06-08 2026-06-08 PrS Proposed sale
3.7
Cho Dennis

Officer

Officer
1,000
69.84
US$100,000 		1,000 69.84 US$100,000
2026-06-08 2026-06-08 PrS Proposed sale
2.3
WERNER ROBERT F.

Officer

Officer
1,000
69.84
US$100,000 		1,000 69.84 US$100,000
2026-06-08 2026-06-08 PrS Proposed sale
2.3
WERNER ROBERT F.

Officer

Officer
1,000
69.84
US$100,000 		1,000 69.84 US$100,000
2026-06-08 2026-06-08 PrS Proposed sale
3.2
Leproust Emily M.

Officer; Director

Executive Director
1,000
69.84
US$100,000 		1,000 69.84 US$100,000
2026-06-08 2026-06-08 PrS Proposed sale
3.2
Leproust Emily M.

Officer; Director

Executive Director
1,000
69.84
US$100,000 		1,000 69.84 US$100,000
2026-06-08 2026-06-08 PrS Proposed sale
2.5
Green Paula

Officer

Officer
1,000
69.84
US$100,000 		1,000 69.84 US$100,000
2026-06-02 2026-05-29 PlS Planned sale
2.6
Laponis Adam

Chief Financial Officer

Officer
1,000 -3.4%
70.00
US$100,000 		1,000 -3.4% 70.00 US$100,000
2026-06-02 2026-05-29 PlS Planned sale
2.6
Laponis Adam

Chief Financial Officer

Officer
1,000 -3.4%
70.00
US$100,000 		1,000 -3.4% 70.00 US$100,000
2026-06-02 2026-05-29 PlS Planned sale
3.7
Cho Dennis

See Remarks

Officer
1,000 -10.6%
69.75
US$100,000 		1,000 -10.6% 69.75 US$100,000
2026-06-02 2026-05-29 PlS Planned sale
3.7
Cho Dennis

See Remarks

Officer
1,000 -10.6%
69.75
US$100,000 		1,000 -10.6% 69.75 US$100,000
2026-05-29 2026-05-29 PrS Proposed sale
3.7
Cho Dennis

Officer

Officer
14,205
69.75
US$990,799 		14,205 69.75 US$990,799
2026-05-29 2026-05-29 PrS Proposed sale
2.6
Laponis Adam

Officer

Officer
4,000
70.00
US$280,000 		4,000 70.00 US$280,000
2026-06-01 2026-05-28 PlS Planned sale
3.3
Starovasnik Melissa A.
Non-Executive Director
1,000 -10.1%
68.00
US$100,000 		1,000 -10.1% 68.00 US$100,000
2026-06-01 2026-05-28 PlS Planned sale
3.2
Leproust Emily M.

Chief Executive Officer

Executive Director
1,000 -0.8%
68.61
US$100,000 		1,000 -0.8% 68.61 US$100,000
2026-06-01 2026-05-28 PlS Planned sale
3.2
Leproust Emily M.

Chief Executive Officer

Executive Director
1,000 -0.9%
67.95
US$100,000 		1,000 -0.9% 67.95 US$100,000
2026-06-01 2026-05-28 PlS Planned sale
3.2
Leproust Emily M.

Chief Executive Officer

Executive Director
1,000 -0.1%
66.85
US$100,000 		1,000 -0.1% 66.85 US$100,000
2026-06-01 2026-05-28 PlS Planned sale
3.2
Leproust Emily M.

Chief Executive Officer

Executive Director
1,000 -0.2%
65.33
US$100,000 		1,000 -0.2% 65.33 US$100,000
2026-05-28 2026-05-28 PrS Proposed sale
3.2
Leproust Emily M.

Officer; Director

Executive Director
16,470
67.91
US$1,118,555 		16,470 67.91 US$1,118,555
2026-05-28 2026-05-28 PrS Proposed sale
3.3
Starovasnik Melissa A.

Director

Non-Executive Director
2,500
68.00
US$170,000 		2,500 68.00 US$170,000
2026-05-28 2026-05-27 PlS Planned sale
3.2
Leproust Emily M.

Chief Executive Officer

Executive Director
1,265 -0.1%
66.28
US$83,846 		1,265 -0.1% 66.28 US$83,846
2026-05-28 2026-05-27 PlS Planned sale
3.2
Leproust Emily M.

Chief Executive Officer

Executive Director
23,752 -2.7%
65.24
US$1,549,561 		23,752 -2.7% 65.24 US$1,549,561
2026-05-27 2026-05-27 PrS Proposed sale
3.2
Leproust Emily M.

Officer; Director

Executive Director
25,017
65.29
US$1,633,407 		25,017 65.29 US$1,633,407
2026-05-28 2026-05-26 PlS Planned sale
3.3
Starovasnik Melissa A.
Non-Executive Director
500 -2.0%
61.04
US$30,520 		500 -2.0% 61.04 US$30,520
2026-05-28 2026-05-26 PlS Planned sale
3.2
Leproust Emily M.

Chief Executive Officer

Executive Director
24,282 -2.8%
65.08
US$1,580,246 		24,282 -2.8% 65.08 US$1,580,246
2026-05-28 2026-05-26 S Sale
2.3
WERNER ROBERT F.

Chief Accounting Officer

Officer
800 -1.6%
62.48
US$49,987 		800 -1.6% 62.48 US$49,987
2026-05-26 2026-05-26 PrS Proposed sale
3.2
Leproust Emily M.

Officer; Director

Executive Director
24,282
65.08
US$1,580,247 		24,282 65.08 US$1,580,247
2026-05-26 2026-05-26 PrS Proposed sale
2.3
WERNER ROBERT F.

Officer

Officer
800
62.48
US$49,987 		800 62.48 US$49,987
2026-05-26 2026-05-26 PrS Proposed sale
3.3
Starovasnik Melissa A.

Director

Non-Executive Director
500
61.04
US$30,520 		500 61.04 US$30,520
2026-05-26 2026-05-21 S Sale
2.6
Laponis Adam

Chief Financial Officer

Officer
2,019 -1.7%
53.26
US$107,526 		2,019 -1.7% 53.26 US$107,526
2026-05-26 2026-05-21 S Sale
2.8
Finn Patrick John

President and COO

Officer
4,160 -1.5%
53.26
US$221,549 		4,160 -1.5% 53.26 US$221,549
2026-05-26 2026-05-21 S Sale
2.3
WERNER ROBERT F.

Chief Accounting Officer

Officer
688 -1.4%
53.26
US$36,641 		688 -1.4% 53.26 US$36,641
2026-05-26 2026-05-21 S Sale
2.5
Green Paula

SVP of Human Resources

Officer
1,399 -1.1%
53.26
US$74,507 		1,399 -1.1% 53.26 US$74,507
2026-05-26 2026-05-21 S Sale
3.7
Cho Dennis

See Remarks

Officer
1,642 -1.2%
53.26
US$87,448 		1,642 -1.2% 53.26 US$87,448
2026-05-26 2026-05-21 S Sale
3.2
Leproust Emily M.

Chief Executive Officer

Executive Director
6,888 -0.8%
53.26
US$366,834 		6,888 -0.8% 53.26 US$366,834
2026-05-21 2026-05-21 PrS Proposed sale
2.3
WERNER ROBERT F.

Officer

Officer
688
53.26
US$36,641 		688 53.26 US$36,641
2026-05-21 2026-05-21 PrS Proposed sale
2.3
WERNER ROBERT F.

Officer

Officer
688
53.26
US$36,641 		688 53.26 US$36,641
2026-05-21 2026-05-21 PrS Proposed sale
3.7
Cho Dennis

Officer

Officer
1,642
53.26
US$87,447 		1,642 53.26 US$87,447
2026-05-21 2026-05-21 PrS Proposed sale
2.6
Laponis Adam

Officer

Officer
2,019
53.26
US$107,525 		2,019 53.26 US$107,525
2026-05-21 2026-05-21 PrS Proposed sale
2.6
Laponis Adam

Officer

Officer
2,019
53.26
US$107,525 		2,019 53.26 US$107,525
2026-05-21 2026-05-21 PrS Proposed sale
2.5
Green Paula

Officer

Officer
1,399
53.26
US$74,506 		1,399 53.26 US$74,506
2026-05-21 2026-05-21 PrS Proposed sale
2.8
Finn Patrick John

Officer

Officer
4,160
53.26
US$221,547 		4,160 53.26 US$221,547
2026-05-21 2026-05-21 PrS Proposed sale
3.2
Leproust Emily M.

Officer; Director

Executive Director
6,888
53.26
US$366,831 		6,888 53.26 US$366,831
2026-05-14 2026-05-12 S Sale
1.8
JOHANNESSEN JAN
Non-Executive Director
12,000 -40.3%
56.12
US$673,440 		12,000 -40.3% 56.12 US$673,440
2026-05-12 2026-05-12 PrS Proposed sale
1.8
JOHANNESSEN JAN

Director

Non-Executive Director
12,000
56.12
US$673,440 		12,000 56.12 US$673,440
2026-05-12 2026-05-08 S Sale
2.3
WERNER ROBERT F.

Chief Accounting Officer

Officer
4,961 -9.1%
56.88
US$282,187 		4,961 -9.1% 56.88 US$282,187
2026-05-08 2026-05-08 PrS Proposed sale
2.3
WERNER ROBERT F.

Officer

Officer
4,961
56.88
US$282,187 		4,961 56.88 US$282,187
2026-05-06 2026-05-04 S Sale
2.8
Finn Patrick John

President and COO

Officer
2,844 -1.0%
57.15
US$162,531 		2,844 -1.0% 57.15 US$162,531
2026-05-06 2026-05-04 S Sale
3.7
Cho Dennis

See Remarks

Officer
1,962 -1.4%
57.15
US$112,126 		1,962 -1.4% 57.15 US$112,126
2026-05-06 2026-05-04 S Sale
3.2
Leproust Emily M.

Chief Executive Officer

Executive Director
5,127 -0.6%
57.15
US$293,002 		5,127 -0.6% 57.15 US$293,002
2026-05-06 2026-05-04 S Sale
2.5
Green Paula

SVP of Human Resources

Officer
1,116 -0.9%
57.15
US$63,778 		1,116 -0.9% 57.15 US$63,778
2026-05-06 2026-05-04 S Sale
2.3
WERNER ROBERT F.

Chief Accounting Officer

Officer
164 -0.3%
57.15
US$9,372 		164 -0.3% 57.15 US$9,372
2026-05-04 2026-05-04 PrS Proposed sale
3.2
Leproust Emily M.

Officer; Director

Executive Director
5,127
57.15
US$293,002 		5,127 57.15 US$293,002
2026-05-04 2026-05-04 PrS Proposed sale
2.5
Green Paula

Officer

Officer
1,116
57.15
US$63,778 		1,116 57.15 US$63,778
2026-05-04 2026-05-04 PrS Proposed sale
2.8
Finn Patrick John

Officer

Officer
2,844
57.15
US$162,531 		2,844 57.15 US$162,531
2026-05-04 2026-05-04 PrS Proposed sale
2.3
WERNER ROBERT F.

Officer

Officer
164
57.15
US$9,372 		164 57.15 US$9,372
2026-05-04 2026-05-04 PrS Proposed sale
3.7
Cho Dennis

Officer

Officer
1,962
57.15
US$112,126 		1,962 57.15 US$112,126
2026-04-29 2026-04-27 PlS Planned sale
3.3
Starovasnik Melissa A.
Non-Executive Director
500 -1.9%
61.83
US$30,915 		500 -1.9% 61.83 US$30,915
2026-04-27 2026-04-27 PrS Proposed sale
3.3
Starovasnik Melissa A.

Director

Non-Executive Director
500
61.83
US$30,915 		500 61.83 US$30,915
2026-04-27 2026-04-23 S Sale
2.8
Finn Patrick John

President and COO

Officer
2,321 -0.8%
60.76
US$141,026 		2,321 -0.8% 60.76 US$141,026
2026-04-23 2026-04-23 PrS Proposed sale
2.8
Finn Patrick John

Officer

Officer
2,321
60.76
US$141,027 		2,321 60.76 US$141,027
2026-04-23 2026-04-22 PlS Planned sale
3.2
Leproust Emily M.

Chief Executive Officer

Executive Director
151 -0.0%
66.00
US$9,966 		151 -0.0% 66.00 US$9,966
2026-04-23 2026-04-22 PlS Planned sale
3.2
Leproust Emily M.

Chief Executive Officer

Executive Director
7,910 -0.9%
65.28
US$516,325 		7,910 -0.9% 65.28 US$516,325
2026-04-22 2026-04-22 PrS Proposed sale
3.2
Leproust Emily M.

Officer; Director

Executive Director
8,061
65.29
US$526,290 		8,061 65.29 US$526,290
2026-04-23 2026-04-21 PlS Planned sale
3.2
Leproust Emily M.

Chief Executive Officer

Executive Director
1,610 -0.2%
65.01
US$104,666 		1,610 -0.2% 65.01 US$104,666
2026-04-21 2026-04-21 PrS Proposed sale
3.2
Leproust Emily M.

Officer; Director

Executive Director
1,610
65.01
US$104,665 		1,610 65.01 US$104,665
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