Twist Bioscience Corp (TWST)
Data as of , from SEC Form 4 filings.
Net insider selling (90d)Watch TWST
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Adam Laponis - OfficerOpen-market sale$385K
About Twist Bioscience Corp (TWST)
Twist Bioscience Corp files with the SEC under CIK 0001581280 and is classified as biological products (no diagnostic substances). We track it alongside the rest of the Health Care sector.
TWST Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market sale | 77 | 808,183 | $119.96M |
| Option exercise | 12 | 767,500 |
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
TWST insider transactions (Form 4)
40219 Form 4 filings on record, the earliest from Oct 4, 2024, newest first. Filing history page 3 of 3.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Adam Laponis - Officer | Open-market sale | Common Stock | 2,019 footnote F1 | $53.26 | $108K | |
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| Jan Johannessen | Option exercise | Common Stock | 12,000 | $14.00 | $168K | |
| Jan Johannessen | Open-market sale | Common Stock | 12,000 | $56.12 | $673K | |
| Jan Johannessen | Option exercise | Employee Stock Option (right to buy) | 12,000 | $0.00 | - | |
 Robert F. Werner - Officer | Open-market sale | Common Stock | 4,961 | $56.88 | $282K | |
| Dennis Cho - Officer | Open-market sale | Common Stock | 1,962 footnote F1 | $57.15 | $112K | |
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| Emily M. Leproust - Officer | Open-market sale | Common Stock | 5,127 footnote F1 | $57.15 | $293K | |
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| Paula Green - Officer | Open-market sale | Common Stock | 1,116 footnote F1 | $57.15 | $64K | |
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 Patrick John Finn - Officer | Open-market sale | Common Stock | 2,844 | $57.15 | $163K | |
| Robert F. Werner - Officer | Open-market sale | Common Stock | 164 footnote F1 | $57.15 | $9K | |
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| Melissa A. Starovasnik | Open-market sale | Common Stock | 500 | $61.83 | $31K | |
| Patrick John Finn - Officer | Open-market sale | Common Stock | 2,321 | $60.76 | $141K | |
| Emily M. Leproust - Officer | Option exercise | Common Stock | 1,610 | $8.82 | $14K | |
| Emily M. Leproust - Officer | Open-market sale | Common Stock | 1,610 | $65.01 footnote F2 | $105K | |
| Emily M. Leproust - Officer | Option exercise | Common Stock | 8,061 | $8.82 | $71K | |
| Emily M. Leproust - Officer | Open-market sale | Common Stock | 7,910 | $65.28 footnote F3 | $516K | |
| Emily M. Leproust - Officer | Open-market sale | Common Stock | 151 | $66.00 footnote F4 | $10K | |
| Emily M. Leproust - Officer | Option exercise | Employee Stock Option (right to buy) | 1,610 | $0.00 | - | |
| Emily M. Leproust - Officer | Option exercise | Employee Stock Option (right to buy) | 8,061 | $0.00 | - | |
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| Adam Laponis - Officer | Open-market sale | Common Stock | 4,000 footnote F1 | $60.00 | $240K | |
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| Adam Laponis - Officer | Open-market sale | Common Stock | 3,000 footnote F1 | $55.00 | $165K | |
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| Adam Laponis - Officer | Open-market sale | Common Stock | 2,597 footnote F1 | $49.89 | $130K | |
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| Melissa A. Starovasnik | Open-market sale | Common Stock | 1,000 | $51.00 | $51K | |
| Dennis Cho - Officer | Open-market sale | Common Stock | 354 footnote F1 | $43.79 | $16K | |
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| Paula Green - Officer | Open-market sale | Common Stock | 297 footnote F1 | $43.79 | $13K | |
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| Emily M. Leproust - Officer | Open-market sale | Common Stock | 1,742 footnote F1 | $43.79 | $76K | |
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 Robert Chess | Option exercise | Common Stock | 10,000 | $11.89 | $119K | |
| Robert Chess | Open-market sale | Common Stock | 10,000 | $47.00 | $470K | |
| Robert Chess | Option exercise | Stock Option (right to buy) | 10,000 | $0.00 | - | |
| Robert F. Werner - Officer | Open-market sale | Common Stock | 246 footnote F1 | $46.43 | $11K | |
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| Dennis Cho - Officer | Open-market sale | Common Stock | 425 footnote F1 | $46.43 | $20K | |
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| Paula Green - Officer | Open-market sale | Common Stock | 935 footnote F1 | $46.43 | $43K | |
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| Emily M. Leproust - Officer | Open-market sale | Common Stock | 2,423 footnote F1 | $46.43 | $112K | |
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| Patrick John Finn - Officer | Open-market sale | Common Stock | 4,294 footnote F1 | $46.71 | $201K | |
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| Robert F. Werner - Officer | Open-market sale | Common Stock | 1,693 footnote F1 | $46.71 | $79K | |
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| Adam Laponis - Officer | Open-market sale | Common Stock | 2,085 footnote F1 | $46.71 | $97K | |
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| Emily M. Leproust - Officer | Open-market sale | Common Stock | 7,205 footnote F1 | $46.71 | $337K | |
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| Paula Green - Officer | Open-market sale | Common Stock | 1,465 footnote F1 | $46.71 | $68K | |
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| Dennis Cho - Officer | Open-market sale | Common Stock | 844 footnote F1 | $46.71 | $39K | |
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| Paula Green - Officer | Open-market sale | Common Stock | 39,404 footnote F1 | $52.40 | $2.06M | |
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See every TWST filing on record
These pages show the latest 90 of 219 Form 4 filings on record. The 7-day demo shows all 219, and sign-up brings you back to this table.
Item 8.01, 9.01
Item 7.01
Item 1.01, 7.01, 9.01
Item 2.02, 9.01
Recent TWST Form 144 notices of proposed sale
3An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| Laponis Adam | Officer | 2,462 | $385K | View on EDGAR | |
| Leproust Emily M. | Officer, Director | 4,548 |
TWST insider trading FAQ
What is the latest insider trade for TWST?
Twist Bioscience Corp (TWST) had 37 insider filings in the last 90 days, with the most recent on 2026-10-13. The full record for TWST runs to 219 Form 4 filings, the earliest from 2024-10-04. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying TWST stock?
No insider purchases of TWST were filed in the last 90 days.
How many insiders are selling TWST stock?
77 insider sales of TWST were filed in the last 90 days, totaling $119.96M.
Where can I see TWST SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects TWST Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Health Care companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Adam Laponis view on EDGAR
- - Emily M. Leproust view on EDGAR
- - Adam Laponis view on EDGAR
- - Paula Green view on EDGAR
- - Patrick John Finn view on EDGAR
- - Emily M. Leproust view on EDGAR
- - Dennis Cho view on EDGAR
- - Robert F. Werner view on EDGAR
- - Emily M. Leproust view on EDGAR
Related companies with recent insider activity
Learn more
- Insider selling: signal or noise?
- Why most insider sales are routine, and the few patterns worth a second look.
- Form 144 vs Form 4
- A Form 144 announces a planned sale; the Form 4 reports it after it happens.
- Insider activity in Health Care
- Where TWST's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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