Quick Takeaways
- TWST - Twist Bioscience Corp has 19 insiders with reported activity on this page.
- Net insider value flow over the last year: -$20,427,950.
- Recent transaction rows are available for direct filing-level review.
Insider Transactions Reported by 19 Insiders of Twist Bioscience Corp
- Symbol
- TWST on Nasdaq
- Location
- South San Francisco, CA
What Changed
- Buy value: ; sell value: $20,427,949.
- Net share flow: -492,750.
Why This Matters
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Source Evidence
Filed on Form 4
See Original Filing
Issuer insider activity is sourced from SEC Forms 3, 4, and 5.
Insider trading overview
Last 12 monthsNet insider flow leans to selling over the last 12 months. Net value: -$20,427,950.
Buys
$0
Shares: 0
Insiders: 0
Sells
$20,427,950
Shares: 492,750
Insiders: 9
Net
-$20,427,950
Shares: -492,750
Insiders: -9
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 193,642 | $0 | $10,195,352 | -$10,195,352 |
| 3-6 | 0 | 90,953 | $0 | $3,703,173 | -$3,703,173 |
| 6-9 | 0 | 177,864 | $0 | $5,584,592 | -$5,584,592 |
| 9-12 | 0 | 30,291 | $0 | $944,832 | -$944,832 |
Twist Bioscience Corp executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Emily M. Leproust | Chief Executive Officer, Director | $48,791,359 | -$4,612,432 | -8.6% | Filing P/S | 04 May 2026 |
| Patrick John Finn | President and COO | $15,942,457 | -$7,304,352 | -31% | Filing P/S | 04 May 2026 |
| William Banyai | Senior Vice President of Advanced Development and General Manager of Data Storage | $12,818,211 | Filing P/S | 03 May 2024 | ||
| Dennis Cho | Senior Vice President, Chief Legal Officer & Corporate Secretary | $7,768,865 | -$989,258 | -11% | Filing P/S | 04 May 2026 |
| Adam Laponis | Chief Financial Officer | $7,121,640 | -$1,905,994 | -21% | Filing P/S | 17 Apr 2026 |
| Paula Green | SVP of Human Resources | $7,028,616 | -$3,076,796 | -30% | Filing P/S | 04 May 2026 |
| Keith Crandell | Director | $3,558,241 | Mixed | 05 Feb 2026 | ||
| Robert Chess | Director | $3,099,486 | -$575,402 | -16% | Mixed | 17 Mar 2026 |
| James M. Thorburn | Chief Financial Officer | $3,000,970 | Mixed | 02 Jan 2024 | ||
| Robert F. Werner | Chief Accounting Officer | $2,825,506 | -$928,486 | -25% | Filing P/S | 08 May 2026 |
| Patrick Weiss | Chief Operating Officer | $1,647,659 | Mixed | 01 Apr 2022 | ||
| Melissa A. Starovasnik | Director | $1,559,476 | -$81,915 | -5% | Filing P/S | 27 Apr 2026 |
| Nelson Chan | Director | $1,141,839 | Mixed | 05 Feb 2026 | ||
| Xiaoying Mai | Director | $1,086,498 | Mixed | 06 Feb 2024 | ||
| Jan Johannessen | Director | $996,354 | -$953,315 | -49% | Filing P/S | 12 May 2026 |
| Robert P. Ragusa | Director | $995,276 | Mixed | 05 Feb 2026 | ||
| Nicolas Barthelemy | Director | $800,210 | Mixed | 21 Nov 2022 | ||
| Katryn Blake | Director | $667,844 | Mixed | 05 Feb 2026 | ||
| Kevin B. Yankton | Chief Accounting Officer | $316,837 | Mixed | 17 May 2023 |
Top shareholders of Twist Bioscience Corp (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| ARK Investment Management LLC |
13D/G
13F
|
Company |
10%
|
6,342,733
|
$301,406,672 | -$57,820,530 | 31 Mar 2026 | |
| Artisan Partners Limited Partnership |
13D/G
13F
|
Artisan Partners Asset Management Inc. · Company |
10%
|
6,217,213
|
$296,312,372 | +$18,444,801 | 27 Feb 2026 | |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC |
13D/G
13F
|
Company |
8.6%
|
5,269,718
|
$264,592,541 | -$34,379,339 | 31 Mar 2026 | |
| BlackRock, Inc. |
13D/G
13F
|
Company |
8.3%
|
4,927,750
|
$197,947,718 | $0 | 31 Mar 2025 | |
| EdgePoint Investment Group Inc. |
13D/G
13F
|
Company |
8.8%
|
5,377,991
|
$184,680,211 | +$44,493,376 | 31 Dec 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
9.4%
|
5,776,198
|
$183,221,001 | — | 31 Dec 2025 | |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
|
Vanguard Capital Management |
5%
|
3,101,909
|
$147,402,716 | $0 | 31 Mar 2026 | |
| STATE STREET CORP |
13F
13D/G
|
Company · STATE STREET CORPORATION |
5.1%
from 13D/G
|
3,627,818
|
$115,074,387 | — | 31 Dec 2025 | |
| Invesco Ltd. |
13D/G
13F
|
Company |
3.9%
|
2,347,929
|
$91,850,982 | $0 | 30 Jun 2025 | |
| Sumitomo Mitsui Trust Group, Inc. |
13F
|
Company |
3.1%
|
1,902,829
|
$60,357,736 | — | 31 Dec 2025 | |
| Amova Asset Management Americas, Inc. |
13F
|
Company |
3.1%
|
1,902,829
|
$60,262,594 | — | 31 Dec 2025 | |
| Soleus Capital Management, L.P. |
13F
|
Company |
3%
|
1,861,802
|
$59,056,359 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
2.8%
|
1,696,594
|
$53,815,962 | — | 31 Dec 2025 | |
| Emily M. Leproust |
3/4/5
|
Chief Executive Officer, Director |
—
mixed-class rows
|
918,710
mixed-class rows
|
$48,791,359 | -$4,612,432 | 04 May 2026 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
2.4%
|
1,497,746
|
$47,508,503 | — | 31 Dec 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
2.4%
|
1,459,274
|
$46,296,523 | — | 31 Dec 2025 | |
| THRIVENT FINANCIAL FOR LUTHERANS |
13F
|
Company |
2.2%
|
1,361,355
|
$43,182,000 | — | 31 Dec 2025 | |
| BAILLIE GIFFORD & CO |
13F
|
Company |
2.1%
|
1,276,195
|
$40,480,906 | — | 31 Dec 2025 | |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC |
13F
|
Company |
1.9%
|
1,173,100
|
$37,210,731 | — | 31 Dec 2025 | |
| First Light Asset Management, LLC |
13F
|
Company |
1.9%
|
1,140,771
|
$36,185,256 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
1.4%
|
866,356
|
$27,480,827 | — | 31 Dec 2025 | |
| AMERICAN CENTURY COMPANIES INC |
13F
|
Company |
1.4%
|
865,634
|
$27,457,993 | — | 31 Dec 2025 | |
| Tao Capital Management LP |
13F
|
Company |
1.4%
|
828,815
|
$26,290,012 | — | 31 Dec 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
1.3%
|
815,369
|
$25,864,898 | — | 31 Dec 2025 | |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
|
Company |
1.3%
|
813,122
|
$25,792,229 | — | 31 Dec 2025 | |
| UBS Group AG |
13F
|
Company |
1.1%
|
662,317
|
$21,008,695 | — | 31 Dec 2025 | |
| JENNISON ASSOCIATES LLC |
13F
|
Company |
1%
|
618,933
|
$19,632,554 | — | 31 Dec 2025 | |
| NEW YORK STATE COMMON RETIREMENT FUND |
13F
|
Company |
0.96%
|
591,180
|
$18,752,230 | — | 31 Dec 2025 | |
| BALYASNY ASSET MANAGEMENT L.P. |
13F
|
Company |
0.95%
|
579,370
|
$18,377,616 | — | 31 Dec 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.89%
|
548,392
|
$17,394,994 | — | 31 Dec 2025 | |
| STEMPOINT CAPITAL LP |
13F
|
Company |
0.85%
|
518,355
|
$16,442,221 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.82%
|
504,838
|
$16,013,461 | — | 31 Dec 2025 | |
| Patrick John Finn |
3/4/5
|
President and COO |
0.46%
|
278,964
|
$15,942,457 | -$7,304,352 | 04 May 2026 | |
| Freshford Capital Management, LLC |
13F
|
Company |
0.69%
|
420,171
|
$13,327,824 | — | 31 Dec 2025 | |
| BNP PARIBAS FINANCIAL MARKETS |
13F
|
Company |
0.68%
|
415,609
|
$13,183,117 | — | 31 Dec 2025 | |
| William Banyai |
3/4/5
|
Senior Vice President of Advanced Development and General Manager of Data Storage |
—
class O/S missing
|
345,188
|
$12,818,211 | — | 03 May 2024 | |
| CITIGROUP INC |
13F
|
Company |
0.65%
|
401,282
|
$12,728,665 | — | 31 Dec 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0.65%
|
399,354
|
$12,667,509 | — | 31 Dec 2025 | |
| Blue Water Life Science Advisors, LP |
13F
|
Company |
0.63%
|
383,000
|
$12,148,760 | — | 31 Dec 2025 | |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd |
13F
|
Company |
0.61%
|
371,552
|
$11,785,629 | — | 31 Dec 2025 | |
| Aberdeen Group plc |
13F
|
Company |
0.5%
|
308,116
|
$9,773,440 | — | 31 Dec 2025 | |
| Nuveen, LLC |
13F
|
Company |
0.47%
|
290,556
|
$9,216,436 | — | 31 Dec 2025 | |
| PEREGRINE CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.47%
|
288,283
|
$9,144,337 | — | 31 Dec 2025 | |
| SEI INVESTMENTS CO |
13F
|
Company |
0.44%
|
270,099
|
$8,567,569 | — | 31 Dec 2025 | |
| SILVERCREST ASSET MANAGEMENT GROUP LLC |
13F
|
Company |
0.44%
|
269,093
|
$8,535,630 | — | 31 Dec 2025 | |
| OSTERWEIS CAPITAL MANAGEMENT INC |
13F
|
Company |
0.42%
|
256,878
|
$8,148,170 | — | 31 Dec 2025 | |
| Dennis Cho |
3/4/5
|
Senior Vice President, Chief Legal Officer & Corporate Secretary |
0.22%
|
135,941
|
$7,768,865 | -$989,258 | 04 May 2026 | |
| JUPITER ASSET MANAGEMENT LTD |
13F
|
Company |
0.4%
|
243,669
|
$7,729,181 | — | 31 Dec 2025 | |
| Pictet Asset Management Holding SA |
13F
|
Company |
0.36%
|
222,647
|
$7,302,353 | — | 31 Dec 2025 | |
| Adam Laponis |
3/4/5
|
Chief Financial Officer |
0.19%
|
118,694
|
$7,121,640 | -$1,905,994 | 17 Apr 2026 |
Recent Insider Transactions by Companies or Individuals for Twist Bioscience Corp
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Jan Johannessen | TWST | Common Stock | Sale | -40.3% | $673,440 | $56.12 | -12,000 | 17,754 | 12 May 2026 | Direct |
| Jan Johannessen | TWST | Common Stock | Options Exercise | 67.6% | 12,000 | 29,754 | 12 May 2026 | Direct | ||
| Jan Johannessen | TWST | Employee Stock Option (right to buy) | Options Exercise | 12,000 | 10,304 | 12 May 2026 | Direct | |||
| Robert F. Werner | TWST | Common Stock | Sale | -9.08% | $282,187 | $56.88 | -4,961 | 49,674 | 08 May 2026 | Direct |
| Dennis Cho | TWST | Common Stock | Sale | -1.42% | $112,126 | $57.15 | -1,962 | 135,941 | 04 May 2026 | Direct |
| Emily M. Leproust | TWST | Common Stock | Sale | -0.6% | $293,002 | $57.15 | -5,127 | 853,760 | 04 May 2026 | Direct |
| Patrick John Finn | TWST | Common Stock | Sale | -1.01% | $162,531 | $57.15 | -2,844 | 278,964 | 04 May 2026 | Direct |
| Paula Green | TWST | Common Stock | Sale | -0.9% | $63,778 | $57.15 | -1,116 | 122,988 | 04 May 2026 | Direct |
| Robert F. Werner | TWST | Common Stock | Sale | -0.3% | $9,372 | $57.15 | -164 | 54,635 | 04 May 2026 | Direct |
| Melissa A. Starovasnik | TWST | Common Stock | Sale | -1.94% | $30,915 | $61.83 | -500 | 25,222 | 27 Apr 2026 | Direct |
| Patrick John Finn | TWST | Common Stock | Sale | -0.82% | $141,026 | $60.76 | -2,321 | 281,808 | 23 Apr 2026 | Direct |
| Emily M. Leproust | TWST | Common Stock | Sale | -0.93% | $526,291 | $65.29 | -8,061 | 858,887 | 22 Apr 2026 | Direct |
| Emily M. Leproust | TWST | Common Stock | Options Exercise | 0.94% | 8,061 | 866,948 | 22 Apr 2026 | Direct | ||
| Emily M. Leproust | TWST | Employee Stock Option (right to buy) | Options Exercise | 6.05% | 8,061 | 141,208 | 22 Apr 2026 | Direct | ||
| Emily M. Leproust | TWST | Common Stock | Sale | -0.19% | $104,666 | $65.01 | -1,610 | 858,887 | 21 Apr 2026 | Direct |
| Emily M. Leproust | TWST | Common Stock | Options Exercise | 0.19% | 1,610 | 860,497 | 21 Apr 2026 | Direct | ||
| Emily M. Leproust | TWST | Employee Stock Option (right to buy) | Options Exercise | 1.09% | 1,610 | 149,269 | 21 Apr 2026 | Direct | ||
| Adam Laponis | TWST | Common Stock | Sale | -3.26% | $240,000 | $60.00 | -4,000 | 118,694 | 17 Apr 2026 | Direct |
| Adam Laponis | TWST | Common Stock | Sale | -2.39% | $165,000 | $55.00 | -3,000 | 122,694 | 14 Apr 2026 | Direct |
| Adam Laponis | TWST | Common Stock | Sale | -2.02% | $129,562 | $49.89 | -2,597 | 125,694 | 09 Apr 2026 | Direct |
| Melissa A. Starovasnik | TWST | Common Stock | Sale | -3.74% | $51,000 | $51.00 | -1,000 | 25,722 | 01 Apr 2026 | Direct |
| Dennis Cho | TWST | Common Stock | Sale | -0.26% | $15,500 | $43.79 | -354 | 137,903 | 20 Mar 2026 | Direct |
| Paula Green | TWST | Common Stock | Sale | -0.24% | $13,005 | $43.79 | -297 | 124,104 | 20 Mar 2026 | Direct |
| Emily M. Leproust | TWST | Common Stock | Sale | -0.2% | $76,276 | $43.79 | -1,742 | 858,887 | 20 Mar 2026 | Direct |
| Robert Chess | TWST | Common Stock | Sale | -32.2% | $470,000 | $47.00 | -10,000 | 21,084 | 17 Mar 2026 | Direct |
| Robert Chess | TWST | Common Stock | Options Exercise | 47.4% | 10,000 | 31,084 | 17 Mar 2026 | Direct | ||
| Robert Chess | TWST | Stock Option (right to buy) | Options Exercise | -35.2% | -10,000 | 18,417 | 17 Mar 2026 | Direct | ||
| Robert F. Werner | TWST | Common Stock | Sale | -0.45% | $11,421 | $46.43 | -246 | 54,799 | 06 Mar 2026 | Direct |
| Dennis Cho | TWST | Common Stock | Sale | -0.31% | $19,731 | $46.43 | -425 | 138,257 | 06 Mar 2026 | Direct |
| Paula Green | TWST | Common Stock | Sale | -0.75% | $43,408 | $46.43 | -935 | 124,401 | 06 Mar 2026 | Direct |
| Emily M. Leproust | TWST | Common Stock | Sale | -0.28% | $112,490 | $46.43 | -2,423 | 860,629 | 06 Mar 2026 | Direct |
| Patrick John Finn | TWST | Common Stock | Sale | -1.49% | $200,572 | $46.71 | -4,294 | 284,129 | 23 Feb 2026 | Direct |
| Robert F. Werner | TWST | Common Stock | Sale | -2.98% | $79,080 | $46.71 | -1,693 | 55,045 | 23 Feb 2026 | Direct |
| Adam Laponis | TWST | Common Stock | Sale | -1.6% | $97,390 | $46.71 | -2,085 | 128,291 | 23 Feb 2026 | Direct |
| Emily M. Leproust | TWST | Common Stock | Sale | -0.83% | $336,544 | $46.71 | -7,205 | 863,052 | 23 Feb 2026 | Direct |
| Paula Green | TWST | Common Stock | Sale | -1.16% | $68,430 | $46.71 | -1,465 | 125,336 | 23 Feb 2026 | Direct |
| Dennis Cho | TWST | Common Stock | Sale | -0.6% | $39,423 | $46.71 | -844 | 138,682 | 23 Feb 2026 | Direct |
| Paula Green | TWST | Common Stock | Sale | -23.8% | $2,064,770 | $52.40 | -39,404 | 126,041 | 17 Feb 2026 | Direct |
| Patrick John Finn | TWST | Common Stock | Sale | -19.3% | $3,562,417 | $51.65 | -68,967 | 287,788 | 17 Feb 2026 | Direct |
| Patrick John Finn | TWST | Common Stock | Options Exercise | 16.5% | 50,505 | 356,755 | 17 Feb 2026 | Direct | ||
| Patrick John Finn | TWST | Stock Option (right to buy) | Options Exercise | -100% | -50,505 | 0 | 17 Feb 2026 | Direct | ||
| Robert Chess | TWST | Common Stock | Sale | -9.39% | $105,402 | $48.26 | -2,184 | 21,084 | 13 Feb 2026 | Direct |
| Patrick John Finn | TWST | Common Stock | Sale | -0.57% | $87,572 | $50.04 | -1,750 | 306,250 | 13 Feb 2026 | Direct |
| Patrick John Finn | TWST | Common Stock | Options Exercise | 0.4% | 1,212 | 308,000 | 13 Feb 2026 | Direct | ||
| Patrick John Finn | TWST | Stock Option (right to buy) | Options Exercise | -6.29% | -1,212 | 18,052 | 13 Feb 2026 | Direct | ||
| Patrick John Finn | TWST | Common Stock | Sale | -1.13% | $175,788 | $50.22 | -3,500 | 306,788 | 12 Feb 2026 | Direct |
| Patrick John Finn | TWST | Common Stock | Options Exercise | 0.81% | 2,500 | 310,288 | 12 Feb 2026 | Direct | ||
| Patrick John Finn | TWST | Stock Option (right to buy) | Options Exercise | -11.8% | -2,500 | 18,705 | 12 Feb 2026 | Direct | ||
| Adam Laponis | TWST | Common Stock | Sale | -5.11% | $350,000 | $50.00 | -7,000 | 130,031 | 12 Feb 2026 | Direct |
| Dennis Cho | TWST | Common Stock | Sale | -3.48% | $249,650 | $49.93 | -5,000 | 138,581 | 11 Feb 2026 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.