🕵️ Twist Bioscience Corp ($TWST)
SEC insider & ownership activity, last 12 months · CIK 1581280 · every row links its SEC filing
Over the last 12 months insiders sold $73.8M with no open-market buying against it. Emily M. Leproust sold $35.5M through a program of 13 sale notices averaging $2.4M (Sep–Sep). 8 planned sales are pending, the largest $14.2M (Emily M. Leproust). No red-flag 8-Ks in the window.
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 10 sellers, $73.8M (160 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Emily M. Leproust | 0 | – | 37 | $35.5M | Sep 8, 2026 |
| Finn Patrick John | 0 | – | 29 | $17.5M | Aug 21, 2026 |
| Cho Dennis | 0 | – | 25 | $7.1M | Sep 8, 2026 |
| Green Paula | 0 | – | 22 | $5.6M | Sep 8, 2026 |
| Laponis Adam | 0 | – | 16 | $2.6M | Aug 21, 2026 |
| Chess Robert | 0 | – | 3 | $2.6M | Aug 7, 2026 |
| Robert F. Werner | 0 | – | 20 | $1.3M | Sep 8, 2026 |
| Johannessen Jan | 0 | – | 3 | $953K | May 12, 2026 |
| Melissa A. Starovasnik | 0 | – | 4 | $282K | May 28, 2026 |
| Blake Katryn | 0 | – | 1 | $275K | Aug 12, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| FMR LLC | 13.2% | 13G | Sep 8, 2026 | filing ↗ | |
| Abigail P. Johnson | 13.2% | 13G | Sep 8, 2026 | filing ↗ | |
| ARK Investment Management LLC | 10.7% | 13G | Mar 7, 2025 | filing ↗ | |
| BlackRock, Inc. | 8.3% | 13G | Apr 17, 2025 | filing ↗ | |
| Artisan Partners Asset Management Inc. | 7.7% | 13G | Aug 13, 2026 | filing ↗ | |
| Artisan Partners Holdings LP | 7.7% | 13G | Aug 13, 2026 | filing ↗ | |
| Artisan Investments GP LLC | 7.7% | 13G | Aug 13, 2026 | filing ↗ | |
| Artisan Partners Limited Partnership | 7.7% | 13G | Aug 13, 2026 | filing ↗ | |
| T. ROWE Price Associates, Inc. | 5.8% | 13G | Aug 14, 2026 | filing ↗ | |
| ARK Investment Management LLC | 5.1% | 13G | Sep 8, 2026 | filing ↗ | |
| Catherine D. Wood | 5.1% | 13G | Sep 8, 2026 | filing ↗ | |
| State Street Corporation | 5.1% | 13G | Nov 10, 2025 | filing ↗ | |
| Vanguard Capital Management | 5.0% | 13G | Apr 30, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Emily M. Leproust | $282K | Sep 8, 2026 | filing ↗ |
| Green Paula | $111K | Sep 8, 2026 | filing ↗ |
| Robert F. Werner | $29K | Sep 8, 2026 | filing ↗ |
| Cho Dennis | $51K | Sep 8, 2026 | filing ↗ |
| Emily M. Leproust | $6.3M | Aug 25, 2026 | filing ↗ |
| Robert F. Werner | $120K | Aug 24, 2026 | filing ↗ |
| Emily M. Leproust | $923K | Aug 21, 2026 | filing ↗ |
| Green Paula | $189K | Aug 21, 2026 | filing ↗ |
| Laponis Adam | $273K | Aug 21, 2026 | filing ↗ |
| Cho Dennis | $222K | Aug 21, 2026 | filing ↗ |
| Robert F. Werner | $93K | Aug 21, 2026 | filing ↗ |
| Finn Patrick John | $563K | Aug 21, 2026 | filing ↗ |
| Cho Dennis | $1.8M | Aug 19, 2026 | filing ↗ |
| Finn Patrick John | $9.5M | Aug 18, 2026 | filing ↗ |
| Emily M. Leproust | $2.5M | Aug 12, 2026 | filing ↗ |
| Blake Katryn | $275K | Aug 12, 2026 | filing ↗ |
| Emily M. Leproust | $14.2M | Aug 10, 2026 | filing ↗ |
| Chess Robert | $2.0M | Aug 7, 2026 | filing ↗ |
| Cho Dennis | $1.6M | Aug 5, 2026 | filing ↗ |
| Emily M. Leproust | $435K | Aug 3, 2026 | filing ↗ |
| Green Paula | $97K | Aug 3, 2026 | filing ↗ |
| Cho Dennis | $91K | Aug 3, 2026 | filing ↗ |
| Finn Patrick John | $246K | Aug 3, 2026 | filing ↗ |
| Robert F. Werner | $14K | Aug 3, 2026 | filing ↗ |
| Finn Patrick John | $210K | Jul 23, 2026 | filing ↗ |
| Laponis Adam | $226K | Jul 9, 2026 | filing ↗ |
| Emily M. Leproust | $1.8M | Jun 25, 2026 | filing ↗ |
| Cho Dennis | $1.3M | Jun 24, 2026 | filing ↗ |
| Emily M. Leproust | $147K | Jun 22, 2026 | filing ↗ |
| Cho Dennis | $30K | Jun 22, 2026 | filing ↗ |
| Green Paula | $25K | Jun 22, 2026 | filing ↗ |
| Green Paula | $2.1M | Jun 15, 2026 | filing ↗ |
| Robert F. Werner | $78K | Jun 8, 2026 | filing ↗ |
| Cho Dennis | $28K | Jun 8, 2026 | filing ↗ |
| Robert F. Werner | $16K | Jun 8, 2026 | filing ↗ |
| Green Paula | $62K | Jun 8, 2026 | filing ↗ |
| Emily M. Leproust | $158K | Jun 8, 2026 | filing ↗ |
| Cho Dennis | $991K | May 29, 2026 | filing ↗ |
| Laponis Adam | $280K | May 29, 2026 | filing ↗ |
| Emily M. Leproust | $1.1M | May 28, 2026 | filing ↗ |
| Melissa A. Starovasnik | $170K | May 28, 2026 | filing ↗ |
| Emily M. Leproust | $1.6M | May 27, 2026 | filing ↗ |
| Emily M. Leproust | $1.6M | May 26, 2026 | filing ↗ |
| Robert F. Werner | $50K | May 26, 2026 | filing ↗ |
| Melissa A. Starovasnik | $31K | May 26, 2026 | filing ↗ |
| Green Paula | $75K | May 21, 2026 | filing ↗ |
| Laponis Adam | $108K | May 21, 2026 | filing ↗ |
| Emily M. Leproust | $367K | May 21, 2026 | filing ↗ |
| Cho Dennis | $87K | May 21, 2026 | filing ↗ |
| Robert F. Werner | $37K | May 21, 2026 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Other events (8.01) | Aug 19, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 19, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Aug 18, 2026 | filing ↗ |
| Material agreement (1.01) | Aug 4, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Aug 4, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 4, 2026 | filing ↗ |
| Earnings (2.02) | Aug 3, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 3, 2026 | filing ↗ |
| Earnings (2.02) | May 4, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 4, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Feb 11, 2026 | filing ↗ |
| Other events (8.01) | Feb 11, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 11, 2026 | filing ↗ |
| Shareholder vote (5.07) | Feb 5, 2026 | filing ↗ |
| Earnings (2.02) | Feb 2, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 2, 2026 | filing ↗ |
| Earnings (2.02) | Jan 12, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 12, 2026 | filing ↗ |
| Earnings (2.02) | Nov 14, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 14, 2025 | filing ↗ |