CIK 0001581280 · Large accelerated filer
Twist Bioscience Corp
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- TWST
- Exchange
- Nasdaq
- Industry
- Biological Products, (No Diagnostic Substances)
- FY end
- Sep 30
- Incorporated
- DE
- Entity type
- operating
- EIN
- 462058888
- Phone
- 800-719-0671
- Business address
- 681 GATEWAY BLVD., SOUTH SAN FRANCISCO, CA, 94080
- Open-market buys, last 90 days
- $0
- in 0 filings
- Open-market sales, last 90 days
- $99,863,292
- in 32 filings, $84.3M under 10b5-1 plans
Net −$99,863,292. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.
Who's trading
90 days
Reading 100 more Form 4s from the SEC; this list fills in as they're read.
| Date | Insider | Transaction | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-03-17 | CHESS ROBERT Director | Option exercise 10b5-1 | +10,000 | $11.89 | $119K | 31,084 |
| 2026-03-17 | CHESS ROBERT Director | Sale 10b5-1 | −10,000 | $47.00 | $470K | 21,084 |
| 2026-03-17 | CHESS ROBERT Director | Option exercise · Stock Option (right to buy) 10b5-1 | −10,000 | 18,417 | ||
| 2026-03-06 | WERNER ROBERT F. Chief Accounting Officer | Sale | −246 | $46.43 | $11K | 54,799 |
| 2026-03-06 | Cho Dennis See Remarks | Sale | −425 | $46.43 | $20K | 138,257 |
| 2026-03-06 | Green Paula SVP of Human Resources | Sale | −935 | $46.43 | $43K | 124,401 |
| 2026-03-06 | Leproust Emily M. Chief Executive Officer | Sale | −2,423 | $46.43 | $112K | 860,629 |
| 2026-02-23 | Green Paula SVP of Human Resources | Sale | −1,465 | $46.71 | $68K | 125,336 |
| 2026-02-23 | Cho Dennis See Remarks | Sale | −844 | $46.71 | $39K | 138,682 |
| 2026-02-23 | Finn Patrick John President and COO | Sale | −4,294 | $46.71 | $201K | 284,129 |
| 2026-02-23 | WERNER ROBERT F. Chief Accounting Officer | Sale | −1,693 | $46.71 | $79K | 55,045 |
| 2026-02-23 | Laponis Adam Chief Financial Officer | Sale | −2,085 | $46.71 | $97K | 128,291 |
| 2026-02-23 | Leproust Emily M. Chief Executive Officer | Sale | −7,205 | $46.71 | $337K | 863,052 |
| 2026-02-17 | Green Paula SVP of Human Resources | Sale | −39,404 | $52.40 | $2.1M | 126,041 |
| 2026-02-17 | Finn Patrick John President and COO | Option exercise 10b5-1 | +18,205 | $23.33 | $425K | 324,455 |
| 2026-02-17 | Finn Patrick John President and COO | Option exercise 10b5-1 | +32,300 | $26.66 | $861K | 356,755 |
| 2026-02-17 | Finn Patrick John President and COO | Sale 10b5-1 | −21,858 | $50.32 | $1.1M | 334,897 |
| 2026-02-17 | Finn Patrick John President and COO | Sale 10b5-1 | −16,616 | $51.42 | $854K | 318,281 |
| 2026-02-17 | Finn Patrick John President and COO | Sale 10b5-1 | −26,952 | $52.69 | $1.4M | 291,329 |
| 2026-02-17 | Finn Patrick John President and COO | Sale 10b5-1 | −3,541 | $53.11 | $188K | 287,788 |
Page 9 of 10 · 194 trades