Comparable stake leader
BlackRock, Inc.
SEC ownership of Twist Bioscience Corp
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001581280.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
21 Aug 2026
- Public ticker
- TWST on Nasdaq
- Parsed ownership sources
-
13F, 13D/G, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
BlackRock, Inc.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
BlackRock, Inc.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
21 Aug 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001581280
- Issuer location
- South San Francisco, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Twist Bioscience Corp (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
21 Aug 2026
13F
13D/G
3/4/5
Lead comparable stake: 8.3%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 8.3%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
8.3%
Artisan Partners Limited Partnership
7.7%
FMR LLC
7.6%
ARK Investment Management LLC
7.3%
PRICE T ROWE ASSOCIATES INC /MD/
5.8%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
8.3%
from 13D/G
|
$600,190,704
5,833,891 shares
|
— | 30 Jun 2026 |
| Artisan Partners Limited Partnership |
13F
13D/G
Company · Artisan Partners Asset Management Inc.
|
7.7%
from 13D/G
|
$494,031,558
4,802,017 shares
|
— | 30 Jun 2026 |
| FMR LLC |
13F
13D/G
Company
|
7.6%
from 13D/G
|
$483,849,178
4,703,044 shares
|
— | 30 Jun 2026 |
| ARK Investment Management LLC |
13F
13D/G
Company
|
7.3%
from 13D/G
|
$468,083,756
4,549,803 shares
|
— | 30 Jun 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
13D/G
Company · T. Rowe Price Associates, Inc.
|
5.8%
from 13D/G
|
$373,934,000
3,634,652 shares
|
— | 30 Jun 2026 |
| STATE STREET CORP |
13F
13D/G
Company · STATE STREET CORPORATION
|
5.1%
from 13D/G
|
$332,562,892
3,232,532 shares
|
— | 30 Jun 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
13D/G
Company · Vanguard Capital Management
|
5%
from 13D/G
|
$277,701,926
2,699,280 shares
|
— | 30 Jun 2026 |
| EdgePoint Investment Group Inc. |
13F
13D/G
Company
|
4.2%
from 13D/G
|
$259,425,809
2,521,635 shares
|
— | 30 Jun 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$73,415,298.
Buys
$0
Insiders: 0
Sells
$73,415,298
Insiders: 10
Net
-$73,415,298
Shares: -960,170
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 960,170
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 400,846 | $0 | $47,385,688 | -$47,385,688 |
| 3-6 | 0 | 172,255 | $0 | $10,494,746 | -$10,494,746 |
| 6-9 | 0 | 202,134 | $0 | $9,770,579 | -$9,770,579 |
| 9-12 | 0 | 184,935 | $0 | $5,764,285 | -$5,764,285 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-19 of 19 reporting-owner rows connected to Twist Bioscience Corp. Open a relationship link for the CIK-to-CIK filing trail.
Rows
19
Largest Forms 3/4/5 holder
Emily M. Leproust
Net 12M change
-$73,415,298
Latest report
25 Aug 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Emily M. Leproust | Chief Executive Officer, Director | $119,036,011 | -$35,307,068 | -23% | Filing P/S | 25 Aug 2026 |
| Patrick John Finn | President and COO | $29,315,390 | -$17,481,309 | -37% | Filing P/S | 21 Aug 2026 |
| Paula Green | SVP of Human Resources | $16,398,801 | -$5,545,611 | -25% | Filing P/S | 21 Aug 2026 |
| Adam Laponis | Chief Financial Officer | $15,107,156 | -$2,647,994 | -15% | Filing P/S | 21 Aug 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 | $10,299,645 | -$7,040,670 | -41% | Filing P/S | 21 Aug 2026 |
| Robert Chess | Director | $6,713,284 | -$2,617,663 | -28% | Mixed | 07 Aug 2026 |
| Robert F. Werner | Chief Accounting Officer | $6,283,684 | -$1,263,982 | -17% | Filing P/S | 21 Aug 2026 |
| Keith Crandell | Director | $3,558,241 | Mixed | 05 Feb 2026 | ||
| James M. Thorburn | Chief Financial Officer | $3,000,970 | Mixed | 02 Jan 2024 | ||
| Katryn Blake | Director | $2,114,519 | -$275,251 | -12% | Filing P/S | 12 Aug 2026 |
| Patrick Weiss | Chief Operating Officer | $1,647,659 | Mixed | 01 Apr 2022 | ||
| Melissa A. Starovasnik | Director | $1,511,096 | -$282,435 | -16% | Filing P/S | 28 May 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 | ||
| Kevin B. Yankton | Chief Accounting Officer | $316,837 | Mixed | 17 May 2023 |
Recent insider transactions for Twist Bioscience Corp
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Emily M. Leproust | TWST | Common Stock | Sale | -5.12% | $6,317,760 | $151.98 | -41,570 | 770,729 | 25 Aug 2026 | Direct |
| Robert F. Werner | TWST | Common Stock | Sale | -1.88% | $120,220 | $140.77 | -854 | 44,637 | 24 Aug 2026 | Direct |
| Dennis Cho | TWST | Common Stock | Sale | -2.11% | $222,227 | $139.07 | -1,598 | 74,063 | 21 Aug 2026 | Direct |
| Patrick John Finn | TWST | Common Stock | Sale | -1.88% | $562,661 | $139.07 | -4,046 | 210,802 | 21 Aug 2026 | Direct |
| Paula Green | TWST | Common Stock | Sale | -1.14% | $189,130 | $139.07 | -1,360 | 117,921 | 21 Aug 2026 | Direct |
| Adam Laponis | TWST | Common Stock | Sale | -1.78% | $273,265 | $139.07 | -1,965 | 108,633 | 21 Aug 2026 | Direct |
| Emily M. Leproust | TWST | Common Stock | Sale | -0.81% | $923,259 | $139.07 | -6,639 | 812,299 | 21 Aug 2026 | Direct |
| Robert F. Werner | TWST | Common Stock | Sale | -1.45% | $93,035 | $139.07 | -669 | 45,491 | 21 Aug 2026 | Direct |
| Dennis Cho | TWST | Common Stock | Sale | -15.8% | $1,843,099 | $129.75 | -14,205 | 75,661 | 19 Aug 2026 | Direct |
| Patrick John Finn | TWST | Common Stock | Sale | -26.7% | $9,217,607 | $117.64 | -78,355 | 214,678 | 18 Aug 2026 | Direct |
| Patrick John Finn | TWST | Common Stock | Options Exercise | 8.66% | 23,355 | 293,033 | 18 Aug 2026 | Direct | ||
| Patrick John Finn | TWST | Stock Option (right to buy) | Options Exercise | -100% | -23,355 | 0 | 18 Aug 2026 | Direct | ||
| Emily M. Leproust | TWST | Common Stock | Sale | -2.38% | $2,495,508 | $125.08 | -19,952 | 818,938 | 12 Aug 2026 | Direct |
| Emily M. Leproust | TWST | Common Stock | Options Exercise | 2.44% | 19,952 | 838,890 | 12 Aug 2026 | Direct | ||
| Emily M. Leproust | TWST | Employee Stock Option (right to buy) | Options Exercise | -13% | -19,952 | 133,269 | 12 Aug 2026 | Direct | ||
| Katryn Blake | TWST | Common Stock | Sale | -11.5% | $275,251 | $122.88 | -2,240 | 17,208 | 12 Aug 2026 | Direct |
| Emily M. Leproust | TWST | Common Stock | Sale | -12.2% | $14,183,051 | $125.16 | -113,318 | 818,938 | 10 Aug 2026 | Direct |
| Emily M. Leproust | TWST | Common Stock | Options Exercise | 13.8% | 113,318 | 932,256 | 10 Aug 2026 | Direct | ||
| Emily M. Leproust | TWST | Employee Stock Option (right to buy) | Options Exercise | -42.5% | -113,318 | 153,221 | 10 Aug 2026 | Direct | ||
| Robert Chess | TWST | Common Stock | Sale | -46.6% | $2,042,261 | $110.89 | -18,417 | 21,084 | 07 Aug 2026 | Direct |
| Robert Chess | TWST | Common Stock | Options Exercise | 87.4% | 18,417 | 39,501 | 07 Aug 2026 | Direct | ||
| Robert Chess | TWST | Stock Option (right to buy) | Options Exercise | -100% | -18,417 | 0 | 07 Aug 2026 | Direct | ||
| Dennis Cho | TWST | Common Stock | Sale | -13.6% | $1,558,999 | $109.75 | -14,205 | 89,866 | 05 Aug 2026 | Direct |
| Patrick John Finn | TWST | Common Stock | Sale | -1.06% | $246,408 | $85.32 | -2,888 | 269,678 | 03 Aug 2026 | Direct |
| Paula Green | TWST | Common Stock | Sale | -0.94% | $96,669 | $85.32 | -1,133 | 119,281 | 03 Aug 2026 | Direct |
| Emily M. Leproust | TWST | Common Stock | Sale | -0.62% | $435,223 | $85.32 | -5,101 | 818,938 | 03 Aug 2026 | Direct |
| Robert F. Werner | TWST | Common Stock | Sale | -0.36% | $14,249 | $85.32 | -167 | 46,160 | 03 Aug 2026 | Direct |
| Dennis Cho | TWST | Common Stock | Sale | -1.02% | $91,294 | $85.32 | -1,070 | 104,071 | 03 Aug 2026 | Direct |
| Patrick John Finn | TWST | Common Stock | Sale | -0.81% | $210,133 | $93.89 | -2,238 | 272,566 | 23 Jul 2026 | Direct |
| Adam Laponis | TWST | Common Stock | Sale | -2.13% | $226,307 | $94.33 | -2,399 | 110,276 | 09 Jul 2026 | Direct |
| Emily M. Leproust | TWST | Common Stock | Sale | -2.24% | $1,793,600 | $95.00 | -18,880 | 824,039 | 25 Jun 2026 | Direct |
| Dennis Cho | TWST | Common Stock | Sale | -11.9% | $1,274,899 | $89.75 | -14,205 | 105,141 | 24 Jun 2026 | Direct |
| Paula Green | TWST | Common Stock | Sale | -0.24% | $25,411 | $87.32 | -291 | 120,414 | 22 Jun 2026 | Direct |
| Dennis Cho | TWST | Common Stock | Sale | -0.29% | $30,214 | $87.32 | -346 | 119,346 | 22 Jun 2026 | Direct |
| Emily M. Leproust | TWST | Common Stock | Sale | -0.2% | $147,400 | $87.32 | -1,688 | 842,919 | 22 Jun 2026 | Direct |
| Paula Green | TWST | Common Stock | Sale | -17.8% | $2,134,488 | $81.67 | -26,137 | 120,705 | 15 Jun 2026 | Direct |
| Paula Green | TWST | Common Stock | Options Exercise | 21.6% | 26,137 | 146,842 | 15 Jun 2026 | Direct | ||
| Paula Green | TWST | Employee Stock Option (right to buy) | Options Exercise | -100% | -26,137 | 0 | 15 Jun 2026 | Direct | ||
| Dennis Cho | TWST | Common Stock | Sale | -0.33% | $28,077 | $69.84 | -402 | 119,692 | 08 Jun 2026 | Direct |
| Paula Green | TWST | Common Stock | Sale | -0.73% | $61,742 | $69.84 | -884 | 120,705 | 08 Jun 2026 | Direct |
| Emily M. Leproust | TWST | Common Stock | Sale | -0.27% | $158,197 | $69.84 | -2,265 | 844,607 | 08 Jun 2026 | Direct |
| Robert F. Werner | TWST | Common Stock | Gift | -1.07% | -500 | 46,327 | 08 Jun 2026 | Direct | ||
| Robert F. Werner | TWST | Common Stock | Sale | -2.82% | $94,046 | $69.20 | -1,359 | 46,827 | 08 Jun 2026 | Direct |
| Dennis Cho | TWST | Common Stock | Sale | -10.6% | $990,799 | $69.75 | -14,205 | 120,094 | 29 May 2026 | Direct |
| Adam Laponis | TWST | Common Stock | Sale | -3.43% | $280,000 | $70.00 | -4,000 | 112,675 | 29 May 2026 | Direct |
| Emily M. Leproust | TWST | Common Stock | Sale | -1.91% | $1,118,555 | $67.91 | -16,470 | 846,872 | 28 May 2026 | Direct |
| Emily M. Leproust | TWST | Common Stock | Options Exercise | 1.94% | 16,470 | 863,342 | 28 May 2026 | Direct | ||
| Emily M. Leproust | TWST | Employee Stock Option (right to buy) | Options Exercise | -17.9% | -16,470 | 75,439 | 28 May 2026 | Direct | ||
| Melissa A. Starovasnik | TWST | Common Stock | Sale | -10.1% | $170,000 | $68.00 | -2,500 | 22,222 | 28 May 2026 | Direct |
| Emily M. Leproust | TWST | Common Stock | Sale | -2.87% | $1,633,407 | $65.29 | -25,017 | 846,872 | 27 May 2026 | Direct |
* marks a reported price that did not pass the local price check.