Quick Takeaways
- TWST - Twist Bioscience Corp has 19 insiders with reported activity on this page.
- Net insider value flow over the last year: -$18,843,854.
- Recent transaction rows are available for direct filing-level review.
- Info
- Insider Trading
- Financials
- Holders
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: $18,843,854.
- Net share flow: -481,881.
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.
Official SEC Source
Insider trading overview
Last 12 monthsNet insider flow leans to selling over the last 12 months. Net value: -$18,843,854.
Buys
$0
Shares: 0
Insiders: 0
Sells
$18,843,854
Shares: 481,881
Insiders: 9
Net
-$18,843,854
Shares: -481,881
Insiders: -9
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 210,856 | $0 | $10,287,152 | -$10,287,152 |
| 3-6 | 0 | 104,574 | $0 | $3,232,562 | -$3,232,562 |
| 6-9 | 0 | 109,998 | $0 | $3,421,285 | -$3,421,285 |
| 9-12 | 0 | 56,453 | $0 | $1,902,855 | -$1,902,855 |
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 | $37,607,569 | -$3,878,309 | -9.3% | Filing P/S | 20 Mar 2026 |
| Patrick John Finn | President and COO | $13,271,608 | -$7,834,787 | -37% | Filing P/S | 23 Feb 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 | $6,038,275 | -$1,066,664 | -15% | Filing P/S | 20 Mar 2026 |
| Adam Laponis | Chief Financial Officer | $5,992,446 | -$1,371,432 | -19% | Filing P/S | 23 Feb 2026 |
| Paula Green | SVP of Human Resources | $5,434,067 | -$3,054,472 | -36% | Filing P/S | 20 Mar 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 | $2,544,098 | -$643,026 | -20% | Filing P/S | 06 Mar 2026 |
| Patrick Weiss | Chief Operating Officer | $1,647,659 | Mixed | 01 Apr 2022 | ||
| Melissa A. Starovasnik | Director | $1,311,822 | -$51,000 | -3.7% | Filing P/S | 01 Apr 2026 |
| Nelson Chan | Director | $1,141,839 | Mixed | 05 Feb 2026 | ||
| Xiaoying Mai | Director | $1,086,498 | Mixed | 06 Feb 2024 | ||
| Robert P. Ragusa | Director | $995,276 | Mixed | 05 Feb 2026 | ||
| Jan Johannessen | Director | $850,535 | -$279,875 | -25% | Filing P/S | 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 |
|---|---|---|---|---|---|---|---|---|
| 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 | |
| ARK Investment Management LLC |
13F
13D/G
|
Company |
12%
from 13D/G
|
7,559,495
|
$239,787,194 | — | 31 Dec 2025 | |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC |
13D/G
13F
|
Company |
9.7%
|
5,954,429
|
$204,475,092 | +$73,747,279 | 31 Dec 2025 | |
| 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 | |
| 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 | |
| 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 | |
| Emily M. Leproust |
3/4/5
|
Chief Executive Officer, Director |
—
mixed-class rows
|
923,837
mixed-class rows
|
$37,607,569 | -$3,878,309 | 20 Mar 2026 | |
| 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 |
1.3%
|
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 |
0.94%
|
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 |
0.84%
|
518,355
|
$16,442,221 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.82%
|
504,838
|
$16,013,461 | — | 31 Dec 2025 | |
| Freshford Capital Management, LLC |
13F
|
Company |
0.68%
|
420,171
|
$13,327,824 | — | 31 Dec 2025 | |
| Patrick John Finn |
3/4/5
|
President and COO |
0.46%
|
284,129
|
$13,271,608 | -$7,834,787 | 23 Feb 2026 | |
| 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 |
0.62%
|
383,000
|
$12,148,760 | — | 31 Dec 2025 | |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd |
13F
|
Company |
0.6%
|
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 | |
| 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 | |
| JPMORGAN CHASE & CO |
13F
|
Company |
0.35%
|
215,147
|
$6,824,462 | — | 31 Dec 2025 | |
| Ensign Peak Advisors, Inc |
13F
|
Company |
0.35%
|
212,593
|
$6,743,450 | — | 31 Dec 2025 | |
| Trexquant Investment LP |
13F
|
Company |
0.32%
|
198,473
|
$6,295,564 | — | 31 Dec 2025 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
| Robert F. Werner | TWST | Common Stock | Gift | -3.4% | -2,000 | 56,738 | 09 Feb 2026 | Direct | ||
| Jan Johannessen | TWST | Common Stock | Sale | -11% | $105,395 | $47.91 | -2,200 | 17,754 | 06 Feb 2026 | Direct |
| Keith Crandell | TWST | Common Stock | Award | 22.7% | 5,095 | 27,571 | 05 Feb 2026 | Direct | ||
| Melissa A. Starovasnik | TWST | Common Stock | Award | 23.6% | 5,095 | 26,722 | 05 Feb 2026 | Direct | ||
| Robert P. Ragusa | TWST | Common Stock | Award | 21.3% | 5,095 | 28,983 | 05 Feb 2026 | Direct | ||
| Robert Chess | TWST | Common Stock | Award | 28% | 5,095 | 23,268 | 05 Feb 2026 | Direct | ||
| Nelson Chan | TWST | Common Stock | Award | 18.1% | 5,095 | 33,251 | 05 Feb 2026 | Direct | ||
| Katryn Blake | TWST | Common Stock | Award | 35.5% | 5,095 | 19,448 | 05 Feb 2026 | Direct | ||
| Jan Johannessen | TWST | Common Stock | Award | 34.3% | 5,095 | 19,954 | 05 Feb 2026 | Direct | ||
| Robert F. Werner | TWST | Common Stock | Sale | -10.6% | $319,536 | $45.65 | -7,000 | 58,738 | 04 Feb 2026 | Direct |
| Emily M. Leproust | TWST | Common Stock | Sale | -0.57% | $232,927 | $46.58 | -5,001 | 869,312 | 03 Feb 2026 | Direct |
| Robert F. Werner | TWST | Common Stock | Sale | -0.27% | $8,151 | $46.58 | -175 | 65,738 | 03 Feb 2026 | Direct |
| Paula Green | TWST | Common Stock | Sale | -0.72% | $55,612 | $46.58 | -1,194 | 165,445 | 03 Feb 2026 | Direct |
| Patrick John Finn | TWST | Common Stock | Sale | -0.87% | $125,988 | $46.58 | -2,705 | 307,788 | 03 Feb 2026 | Direct |
| Dennis Cho | TWST | Common Stock | Sale | -0.76% | $51,187 | $46.58 | -1,099 | 143,581 | 03 Feb 2026 | Direct |
| Patrick John Finn | TWST | Common Stock | Sale | -0.76% | $107,330 | $44.91 | -2,390 | 310,493 | 23 Jan 2026 | Direct |
| Adam Laponis | TWST | Common Stock | Sale | -2.14% | $120,000 | $40.00 | -3,000 | 137,031 | 13 Jan 2026 | Direct |
| Patrick John Finn | TWST | Common Stock | Sale | -6.92% | $931,160 | $40.00 | -23,279 | 312,883 | 13 Jan 2026 | Direct |
| Patrick John Finn | TWST | Common Stock | Options Exercise | 0.99% | 3,279 | 336,162 | 13 Jan 2026 | Direct | ||
| Patrick John Finn | TWST | Stock Option (right to buy) | Options Exercise | -100% | -3,279 | 0 | 13 Jan 2026 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.