As of the latest Form 4 filed Jun 26, 2026.
What Twist Bioscience Corp insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 38 most recent filings for TWST.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-06-26 | 2026-06-25 | Leproust Emily M. Chief Executive Officer | SSale | −18.9K | $95.00 | $1.79M | Yes (planned) | Form 4 ↗ |
| 2026-06-26 | 2026-06-24 | Cho Dennis See Remarks | SSale | −14.2K | $89.75 | $1.27M | Yes (planned) | Form 4 ↗ |
| 2026-06-24 | 2026-06-22 | Green Paula SVP of Human Resources | SSale | −291.00 | $87.32 | $25.4K | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-22 | Cho Dennis See Remarks | SSale | −346.00 | $87.32 | $30.2K | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-22 | Leproust Emily M. Chief Executive Officer | SSale | −1.69K | $87.32 | $147K | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | Green Paula SVP of Human Resources | SSale | −2.03K | $82.17 | $167K | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | Green Paula, SVP of Human Resources | SSale | −24.1K | $81.62 | $1.97M | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | Green Paula, SVP of Human Resources | MExercise | +26.1K | $23.33 | $610K | No | Form 4 ↗ |
| 2026-06-10 | 2026-06-08 | Cho Dennis See Remarks | SSale | −402.00 | $69.84 | $28.1K | No | Form 4 ↗ |
| 2026-06-10 | 2026-06-08 | Green Paula SVP of Human Resources | SSale | −884.00 | $69.84 | $61.7K | No | Form 4 ↗ |
| 2026-06-10 | 2026-06-08 | Leproust Emily M. Chief Executive Officer | SSale | −2.27K | $69.84 | $158K | No | Form 4 ↗ |
| 2026-06-10 | 2026-06-08 | WERNER ROBERT F. Chief Accounting Officer | GGift | −500.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-10 | 2026-06-08 | WERNER ROBERT F., Chief Accounting Officer | SSale | −1.13K | $69.07 | $77.8K | No | Form 4 ↗ |
| 2026-06-10 | 2026-06-08 | WERNER ROBERT F., Chief Accounting Officer | SSale | −232.00 | $69.84 | $16.2K | No | Form 4 ↗ |
| 2026-05-28 | 2026-05-27 | Leproust Emily M. Chief Executive Officer | SSale | −1.26K | $66.28 | $83.8K | Yes (planned) | Form 4 ↗ |
| 2026-05-28 | 2026-05-27 | Leproust Emily M., Chief Executive Officer | SSale | −23.8K | $65.24 | $1.55M | Yes (planned) | Form 4 ↗ |
| 2026-05-28 | 2026-05-27 | Leproust Emily M., Chief Executive Officer | MExercise | +25.0K | $8.82 | $221K | Yes (planned) | Form 4 ↗ |
| 2026-05-28 | 2026-05-26 | Leproust Emily M., Chief Executive Officer | SSale | −24.3K | $65.08 | $1.58M | Yes (planned) | Form 4 ↗ |
| 2026-05-28 | 2026-05-26 | Leproust Emily M., Chief Executive Officer | MExercise | +24.3K | $8.82 | $214K | Yes (planned) | Form 4 ↗ |
| 2026-05-28 | 2026-05-26 | WERNER ROBERT F. Chief Accounting Officer | SSale | −800.00 | $62.48 | $50.0K | No | Form 4 ↗ |
| 2026-05-28 | 2026-05-26 | Starovasnik Melissa A. Director | SSale | −500.00 | $61.04 | $30.5K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Cho Dennis See Remarks | SSale | −1.96K | $57.15 | $112K | No | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Leproust Emily M. Chief Executive Officer | SSale | −5.13K | $57.15 | $293K | No | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Finn Patrick John President and COO | SSale | −2.84K | $57.15 | $163K | No | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Green Paula SVP of Human Resources | SSale | −1.12K | $57.15 | $63.8K | No | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | WERNER ROBERT F. Chief Accounting Officer | SSale | −164.00 | $57.15 | $9.37K | No | Form 4 ↗ |
| 2026-04-29 | 2026-04-27 | Starovasnik Melissa A. Director | SSale | −500.00 | $61.83 | $30.9K | Yes (planned) | Form 4 ↗ |
| 2026-04-27 | 2026-04-23 | Finn Patrick John President and COO | SSale | −2.32K | $60.76 | $141K | No | Form 4 ↗ |
| 2026-04-23 | 2026-04-22 | Leproust Emily M. Chief Executive Officer | SSale | −151.00 | $66.00 | $9.97K | Yes (planned) | Form 4 ↗ |
| 2026-04-23 | 2026-04-22 | Leproust Emily M., Chief Executive Officer | SSale | −7.91K | $65.28 | $516K | Yes (planned) | Form 4 ↗ |
| 2026-04-23 | 2026-04-22 | Leproust Emily M., Chief Executive Officer | MExercise | +8.06K | $8.82 | $71.1K | Yes (planned) | Form 4 ↗ |
| 2026-04-23 | 2026-04-21 | Leproust Emily M., Chief Executive Officer | SSale | −1.61K | $65.01 | $105K | Yes (planned) | Form 4 ↗ |
| 2026-04-23 | 2026-04-21 | Leproust Emily M., Chief Executive Officer | MExercise | +1.61K | $8.82 | $14.2K | Yes (planned) | Form 4 ↗ |
| 2026-04-21 | 2026-04-17 | Laponis Adam Chief Financial Officer | SSale | −4.00K | $60.00 | $240K | Yes (planned) | Form 4 ↗ |
| 2026-04-16 | 2026-04-14 | Laponis Adam Chief Financial Officer | SSale | −3.00K | $55.00 | $165K | Yes (planned) | Form 4 ↗ |
| 2026-04-13 | 2026-04-09 | Laponis Adam Chief Financial Officer | SSale | −2.60K | $49.89 | $130K | No | Form 4 ↗ |
| 2026-03-19 | 2026-03-17 | CHESS ROBERT Director | SSale | −10.0K | $47.00 | $470K | Yes (planned) | Form 4 ↗ |
| 2026-03-19 | 2026-03-17 | CHESS ROBERT, Director | MExercise | +10.0K | $11.89 | $119K | Yes (planned) | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also TWST’s full analysis or the market-wide insider trading feed. The tabs above jump to TWST’s other SEC data.
Source: SEC Form 4 filings for TWST, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.