SEC Form 4Coverage since Aug 21, 2025Open-market trades only
$TWST insider trading
Over the last 12 months, Twist Bioscience insiders reported no purchases and 133 sales totaling $72.8M across SEC Form 4 filings. 23% of those filings were made under pre-arranged 10b5-1 trading plans.
- Bought · 12m
- — 0 events
- Sold · 12m
- $72.8M 133 events
- Events · 12m
- 133 Form 4 filings, grouped
- Insiders · 12m
- 10 distinct reporters
- 10b5-1 share
- 23% of events, not dollars
Side
Price · $TWST · 3Mvia TradingView
Top insiders · 12m
Leproust Emily M.Chief Executive Officer29× · $35.5M
Cho DennisSee Remarks24× · $7.1M
Green PaulaSVP of Human Resources21× · $5.6M
Finn Patrick JohnPresident and COO19× · $17.5M
WERNER ROBERT F.Chief Accounting Officer15× · $1.0M
All insider trades
50 of 145 events
Scroll the table sideways for price, value and marks.
| Date | Insider | Type | Shares | Avg price | Value | Δ stake | Marks |
|---|---|---|---|---|---|---|---|
| Sep 8, 2026 | Cho DennisSee Remarks · O | ▼ Sale | 412 | $122.62 | $51K | -0.6% | — |
| Sep 8, 2026 | Green PaulaSVP of Human Resources · O | ▼ Sale | 907 | $122.62 | $111K | -0.8% | — |
| Sep 8, 2026 | Leproust Emily M.Chief Executive Officer · O·D | ▼ Sale | 2,302 | $122.62 | $282K | -0.3% | — |
| Sep 8, 2026 | WERNER ROBERT F.Chief Accounting Officer · O | ▼ Sale | 238 | $122.62 | $29K | -0.5% | — |
| Aug 25, 2026 | Leproust Emily M.Chief Executive Officer · O·D | ▼ Sale | 41,570 | $151.98 | $6.3M | -5.1% | plan · 5 tranches |
| Aug 24, 2026 | WERNER ROBERT F.Chief Accounting Officer · O | ▼ Sale | 1,523 | $140.02 | $213K | -3.3% | 2 tranches |
| Aug 21, 2026 | Cho DennisSee Remarks · O | ▼ Sale | 1,598 | $139.07 | $222K | -2.1% | — |
| Aug 21, 2026 | Finn Patrick JohnPresident and COO · O | ▼ Sale | 4,046 | $139.07 | $563K | -1.9% | — |
| Aug 21, 2026 | Green PaulaSVP of Human Resources · O | ▼ Sale | 1,360 | $139.07 | $189K | -1.1% | — |
| Aug 21, 2026 | Laponis AdamChief Financial Officer · O | ▼ Sale | 1,965 | $139.07 | $273K | -1.8% | — |
| Aug 21, 2026 | Leproust Emily M.Chief Executive Officer · O·D | ▼ Sale | 6,639 | $139.07 | $923K | -0.8% | — |
| Aug 19, 2026 | Cho DennisSee Remarks · O | ▼ Sale | 14,205 | $129.75 | $1.8M | -15.8% | plan |
| Aug 18, 2026 | Finn Patrick JohnPresident and COO · O | ▼ Sale | 78,355 | $117.64 | $9.2M | -26.7% | plan · 7 tranches |
| Aug 12, 2026 | Leproust Emily M.Chief Executive Officer · O·D | ▼ Sale | 19,952 | $125.08 | $2.5M | -2.4% | plan |
| Aug 12, 2026 | BLAKE KATRYND | ▼ Sale | 2,240 | $122.88 | $275K | -11.5% | — |
| Aug 10, 2026 | Leproust Emily M.Chief Executive Officer · O·D | ▼ Sale | 113,318 | $125.16 | $14.2M | -12.2% | plan |
| Aug 7, 2026 | CHESS ROBERTD | ▼ Sale | 18,417 | $110.89 | $2.0M | -46.6% | plan |
| Aug 5, 2026 | Cho DennisSee Remarks · O | ▼ Sale | 14,205 | $109.75 | $1.6M | -13.6% | plan |
| Aug 3, 2026 | Finn Patrick JohnPresident and COO · O | ▼ Sale | 2,888 | $85.32 | $246K | -1.1% | — |
| Aug 3, 2026 | Green PaulaSVP of Human Resources · O | ▼ Sale | 1,133 | $85.32 | $97K | -0.9% | — |
| Aug 3, 2026 | Leproust Emily M.Chief Executive Officer · O·D | ▼ Sale | 5,101 | $85.32 | $435K | -0.6% | — |
| Aug 3, 2026 | WERNER ROBERT F.Chief Accounting Officer · O | ▼ Sale | 167 | $85.32 | $14K | -0.4% | — |
| Aug 3, 2026 | Cho DennisSee Remarks · O | ▼ Sale | 1,070 | $85.32 | $91K | -1% | — |
| Jul 23, 2026 | Finn Patrick JohnPresident and COO · O | ▼ Sale | 2,238 | $93.89 | $210K | -0.8% | — |
| Jul 9, 2026 | Laponis AdamChief Financial Officer · O | ▼ Sale | 2,399 | $94.33 | $226K | -2.1% | — |
| Jun 25, 2026 | Leproust Emily M.Chief Executive Officer · O·D | ▼ Sale | 18,880 | $95 | $1.8M | -2.2% | plan |
| Jun 24, 2026 | Cho DennisSee Remarks · O | ▼ Sale | 14,205 | $89.75 | $1.3M | -11.9% | plan |
| Jun 22, 2026 | Green PaulaSVP of Human Resources · O | ▼ Sale | 291 | $87.32 | $25K | -0.2% | — |
| Jun 22, 2026 | Cho DennisSee Remarks · O | ▼ Sale | 346 | $87.32 | $30K | -0.3% | — |
| Jun 22, 2026 | Leproust Emily M.Chief Executive Officer · O·D | ▼ Sale | 1,688 | $87.32 | $147K | -0.2% | — |
| Jun 15, 2026 | Green PaulaSVP of Human Resources · O | ▼ Sale | 26,137 | $81.67 | $2.1M | -17.8% | 2 tranches |
| Jun 8, 2026 | Cho DennisSee Remarks · O | ▼ Sale | 402 | $69.84 | $28K | -0.3% | — |
| Jun 8, 2026 | Green PaulaSVP of Human Resources · O | ▼ Sale | 884 | $69.84 | $62K | -0.7% | — |
| Jun 8, 2026 | Leproust Emily M.Chief Executive Officer · O·D | ▼ Sale | 2,265 | $69.84 | $158K | -0.3% | — |
| Jun 8, 2026 | WERNER ROBERT F.Chief Accounting Officer · O | ▼ Sale | 1,359 | $69.2 | $94K | -2.8% | 2 tranches |
| May 29, 2026 | Cho DennisSee Remarks · O | ▼ Sale | 14,205 | $69.75 | $991K | -10.6% | plan |
| May 29, 2026 | Laponis AdamChief Financial Officer · O | ▼ Sale | 4,000 | $70 | $280K | -3.4% | plan |
| May 28, 2026 | Leproust Emily M.Chief Executive Officer · O·D | ▼ Sale | 6,465 | $68.61 | $444K | -0.8% | plan |
| May 28, 2026 | Leproust Emily M.Chief Executive Officer · O·D | ▼ Sale | 7,623 | $67.95 | $518K | -0.9% | plan |
| May 28, 2026 | Leproust Emily M.Chief Executive Officer · O·D | ▼ Sale | 900 | $66.85 | $60K | -0.1% | plan |
| May 28, 2026 | Leproust Emily M.Chief Executive Officer · O·D | ▼ Sale | 1,482 | $65.33 | $97K | -0.2% | plan |
| May 28, 2026 | Starovasnik Melissa A.D | ▼ Sale | 2,500 | $68 | $170K | -10.1% | plan |
| May 27, 2026 | Leproust Emily M.Chief Executive Officer · O·D | ▼ Sale | 49,299 | $65.19 | $3.2M | -5.5% | plan · 3 tranches |
| May 26, 2026 | WERNER ROBERT F.Chief Accounting Officer · O | ▼ Sale | 800 | $62.48 | $50K | -1.6% | — |
| May 26, 2026 | Starovasnik Melissa A.D | ▼ Sale | 500 | $61.04 | $31K | -2% | plan |
| May 21, 2026 | Green PaulaSVP of Human Resources · O | ▼ Sale | 1,399 | $53.26 | $75K | -1.1% | — |
| May 21, 2026 | Finn Patrick JohnPresident and COO · O | ▼ Sale | 4,160 | $53.26 | $222K | -1.5% | — |
| May 21, 2026 | Cho DennisSee Remarks · O | ▼ Sale | 1,642 | $53.26 | $87K | -1.2% | — |
| May 21, 2026 | WERNER ROBERT F.Chief Accounting Officer · O | ▼ Sale | 688 | $53.26 | $37K | -1.4% | — |
| May 21, 2026 | Leproust Emily M.Chief Executive Officer · O·D | ▼ Sale | 6,888 | $53.26 | $367K | -0.8% | — |
Every $TWST filing on this page is one API call away
The same Form 4 data over REST or MCP, already grouped into events with the plan flag and the dollar value read. A free key does 100 calls a day and needs no card. Prefer email? Twist Bioscience filings can reach your inbox instead.
About Form 4
Corporate insiders — officers, directors and 10%+ owners — must report their trades to the SEC on Form 4 within two business days. This page shows open-market activity: purchases (code P), sales (S) and dispositions back to the issuer (D). Scheduled compensation events such as stock grants and option exercises are also filed on Form 4 but carry no trading signal, so they are not shown and counts here can be lower than the raw EDGAR filing total. We group each filing's transactions into one economic event (a laddered 10b5-1 sale is one event, not 25 rows), flag pre-arranged plans and late filings, and link every event to its AI-scored article in the $TWST feed.