TWST (Twist Bioscience Corporation Common Stock)
Insider Trading Activity
Every open-market purchase and sale reported by TWST officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-27 | Emily M. Leproust | Chief Executive Officer | Sell | — | — |
| 2026-08-25 | Adam Laponis | Chief Financial Officer | Sell | — | — |
| 2026-08-25 | Paula Green | SVP of Human Resources | Sell | — | — |
| 2026-08-25 | Patrick John Finn | President and COO | Sell | — | — |
| 2026-08-25 | Dennis Cho | See Remarks | Sell | — | — |
| 2026-08-25 | ROBERT F. WERNER | Chief Accounting Officer | Sell | — | — |
| 2026-08-25 | Emily M. Leproust | Chief Executive Officer | Sell | — | — |
| 2026-08-21 | Dennis Cho | See Remarks | Sell | — | — |
| 2026-08-20 | Patrick John Finn | President and COO | MIXED | — | — |
| 2026-08-14 | KATRYN BLAKE | Director | Sell | — | — |
| 2026-08-14 | Emily M. Leproust | Chief Executive Officer | MIXED | — | — |
| 2026-08-12 | Emily M. Leproust | Chief Executive Officer | MIXED | — | — |
| 2026-08-11 | ROBERT CHESS | Director | MIXED | — | — |
| 2026-08-07 | Dennis Cho | See Remarks | Sell | — | — |
| 2026-08-07 | Dennis Cho | See Remarks | Sell | — | — |
| 2026-08-05 | Paula Green | SVP of Human Resources | Sell | — | — |
| 2026-08-05 | Patrick John Finn | President and COO | Sell | — | — |
| 2026-08-05 | Emily M. Leproust | Chief Executive Officer | Sell | — | — |
| 2026-08-05 | Dennis Cho | See Remarks | Sell | — | — |
| 2026-08-05 | ROBERT F. WERNER | Chief Accounting Officer | Sell | — | — |
| 2026-07-27 | Patrick John Finn | President and COO | Sell | — | — |
| 2026-07-13 | Adam Laponis | Chief Financial Officer | Sell | — | — |
| 2026-06-26 | Dennis Cho | See Remarks | Sell | — | — |
| 2026-06-26 | Emily M. Leproust | Chief Executive Officer | Sell | — | — |
| 2026-06-24 | Dennis Cho | See Remarks | Sell | — | — |
| 2026-06-24 | Paula Green | SVP of Human Resources | Sell | — | — |
| 2026-06-24 | Emily M. Leproust | Chief Executive Officer | Sell | — | — |
| 2026-06-17 | Paula Green | SVP of Human Resources | MIXED | — | — |
| 2026-06-10 | Paula Green | SVP of Human Resources | Sell | — | — |
| 2026-06-10 | Dennis Cho | See Remarks | Sell | — | — |
| 2026-06-10 | Emily M. Leproust | Chief Executive Officer | Sell | — | — |
| 2026-06-10 | ROBERT F. WERNER | Chief Accounting Officer | MIXED | — | — |
| 2026-06-02 | Dennis Cho | See Remarks | Sell | — | — |
| 2026-06-02 | Adam Laponis | Chief Financial Officer | Sell | — | — |
| 2026-06-01 | Melissa A. Starovasnik | Director | Sell | — | — |
| 2026-06-01 | Emily M. Leproust | Chief Executive Officer | MIXED | — | — |
| 2026-05-28 | ROBERT F. WERNER | Chief Accounting Officer | Sell | — | — |
| 2026-05-28 | Melissa A. Starovasnik | Director | Sell | — | — |
| 2026-05-28 | Emily M. Leproust | Chief Executive Officer | MIXED | — | — |
| 2026-05-26 | Adam Laponis | Chief Financial Officer | Sell | — | — |
| 2026-05-26 | Dennis Cho | See Remarks | Sell | — | — |
| 2026-05-26 | Paula Green | SVP of Human Resources | Sell | — | — |
| 2026-05-26 | Patrick John Finn | President and COO | Sell | — | — |
| 2026-05-26 | ROBERT F. WERNER | Chief Accounting Officer | Sell | — | — |
| 2026-05-26 | Emily M. Leproust | Chief Executive Officer | Sell | — | — |
| 2026-05-14 | JAN JOHANNESSEN | Director | MIXED | — | — |
| 2026-05-12 | ROBERT F. WERNER | Chief Accounting Officer | Sell | — | — |
| 2026-05-06 | Paula Green | SVP of Human Resources | Sell | — | — |
| 2026-05-06 | Patrick John Finn | President and COO | Sell | — | — |
| 2026-05-06 | Emily M. Leproust | Chief Executive Officer | Sell | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | 10%+ Owner | 3,294,961 | — |
| — | 10%+ Owner | 2,392,422 | — |
| — | Chief Executive Officer | 805,566 | — |
| — | Chief Technology Officer | 646,112 | — |
| — | See Remark | 345,188 | — |
| — | President and COO | 210,802 | — |
| — | SVP of Human Resources | 117,921 | — |
| — | Chief Financial Officer | 108,633 | — |
| — | Director | 103,618 | — |
| — | Chief Financial Officer | 86,334 | — |
| — | Director | 82,029 | — |
| — | See Remarks | 74,063 | — |
| — | See Remarks | 66,736 | — |
| — | Director | 58,168 | — |
| — | Chief Operating Officer | 47,401 | — |
| — | Chief Accounting Officer | 44,637 | — |
| — | Director | 33,251 | — |
| — | Director | 31,057 | — |
| — | Director | 29,754 | — |
| — | Director | 28,983 | — |
| — | Director | 23,021 | — |
| — | Director | 22,222 | — |
| — | SVP, Operations | 20,346 | — |
| — | Director | 17,208 | — |
| — | Chief Accounting Officer | 9,115 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the TWST quote page; the site-wide leaderboard is on the insider transactions hub.