🕵️ 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 $32.7M with no open-market buying against it. Emily M. Leproust sold $11.2M through a program of 12 sale notices averaging $659K (Aug–Jun). 6 planned sales are pending, the largest $1.6M (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) · 9 sellers, $32.7M (142 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Emily M. Leproust | 0 | – | 30 | $11.2M | Jun 25, 2026 |
| Finn Patrick John | 0 | – | 22 | $7.6M | Jul 23, 2026 |
| Green Paula | 0 | – | 22 | $5.3M | Jun 22, 2026 |
| Cho Dennis | 0 | – | 23 | $3.4M | Jun 24, 2026 |
| Laponis Adam | 0 | – | 16 | $2.4M | Jul 9, 2026 |
| Robert F. Werner | 0 | – | 20 | $1.1M | Jun 8, 2026 |
| Johannessen Jan | 0 | – | 3 | $953K | May 12, 2026 |
| Chess Robert | 0 | – | 2 | $575K | Mar 17, 2026 |
| Melissa A. Starovasnik | 0 | – | 4 | $282K | May 28, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| ARK Investment Management LLC | 10.7% | 13G | Mar 7, 2025 | filing ↗ | |
| ARK Investment Management LLC | 10.3% | 13G | Apr 30, 2026 | filing ↗ | |
| Catherine D. Wood | 10.3% | 13G | Apr 30, 2026 | filing ↗ | |
| Artisan Partners Asset Management Inc. | 10.1% | 13G | Mar 6, 2026 | filing ↗ | |
| Artisan Partners Holdings LP | 10.1% | 13G | Mar 6, 2026 | filing ↗ | |
| Artisan Investments GP LLC | 10.1% | 13G | Mar 6, 2026 | filing ↗ | |
| Artisan Partners Limited Partnership | 10.1% | 13G | Mar 6, 2026 | filing ↗ | |
| Edgepoint Investment Group Inc. | 8.8% | 13G | Feb 17, 2026 | filing ↗ | |
| William Blair Investment Management, LLC | 8.6% | 13G | May 7, 2026 | filing ↗ | |
| Blackrock, Inc. | 8.3% | 13G | Apr 17, 2025 | 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 | |
|---|---|---|---|
| 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 ↗ |
| Finn Patrick John | $222K | May 21, 2026 | filing ↗ |
| Johannessen Jan | $673K | May 12, 2026 | filing ↗ |
| Robert F. Werner | $282K | May 8, 2026 | filing ↗ |
| Emily M. Leproust | $293K | May 4, 2026 | filing ↗ |
| Green Paula | $64K | May 4, 2026 | filing ↗ |
| Finn Patrick John | $163K | May 4, 2026 | filing ↗ |
| Robert F. Werner | $9K | May 4, 2026 | filing ↗ |
| Cho Dennis | $112K | May 4, 2026 | filing ↗ |
| Melissa A. Starovasnik | $31K | Apr 27, 2026 | filing ↗ |
| Finn Patrick John | $141K | Apr 23, 2026 | filing ↗ |
| Emily M. Leproust | $526K | Apr 22, 2026 | filing ↗ |
| Emily M. Leproust | $105K | Apr 21, 2026 | filing ↗ |
| Laponis Adam | $240K | Apr 17, 2026 | filing ↗ |
| Laponis Adam | $165K | Apr 14, 2026 | filing ↗ |
| Laponis Adam | $130K | Apr 9, 2026 | filing ↗ |
| Melissa A. Starovasnik | $51K | Apr 1, 2026 | filing ↗ |
| Emily M. Leproust | $76K | Mar 20, 2026 | filing ↗ |
| Cho Dennis | $16K | Mar 20, 2026 | filing ↗ |
| Green Paula | $13K | Mar 20, 2026 | filing ↗ |
| Chess Robert | $470K | Mar 17, 2026 | filing ↗ |
| Robert F. Werner | $11K | Mar 6, 2026 | filing ↗ |
| Green Paula | $43K | Mar 6, 2026 | filing ↗ |
| Cho Dennis | $20K | Mar 6, 2026 | filing ↗ |
| Emily M. Leproust | $112K | Mar 6, 2026 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| 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 ↗ |
| Officer/director changes (5.02) | Aug 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 5, 2025 | filing ↗ |
| Earnings (2.02) | Aug 4, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 4, 2025 | filing ↗ |