Total buying$00 buys
TWST
Twist Bioscience Corp
NasdaqHealthcareBiological Products, (No Diagnostic Substances)
Insider activity for last month from 09/19 to 10/19.
How these metrics are calculated
Counts use processed Form 4 rows. Purchase and sale metrics use codes P and S; totals remain unknown when any matching value is missing. Rows without a usable transaction date cannot be assigned to a rolling period and are excluded.
Total selling$20.8M19 sells
Net open-market−$20.8MBuying minus selling
Active insiders6Distinct reporting owners
Insider activity report
Calendar-month buckets within the selected date range
Latest filing: Oct 13, 2026
Open-market transaction mix · 19 transactions in the selected period
Code A includes awards, grants and other acquisitions; these are not open-market buys. A rolling period can include partial calendar months.
View exact monthly counts and disclosed values
| Month | Buys | Sells | Awards (A) | Buy value | Sell value | Net P/S value |
|---|---|---|---|---|---|---|
| Sep 2026 | 0 | 3 | 0 | $0 | $385k | -$385k |
| Oct 2026 | 0 | 16 | 0 | $0 | $20.4M | -$20.4M |
Distinct insiders active
Reporting-owner CIKs by month · peak Oct 2026 (6)Sep 2026Oct 2026
Largest insider activity
By absolute net disclosed value · current transaction page- LM-$10.0M
- FJ-$4.9M
- GP-$2.0M
- LA-$1.9M
- CD-$1.9M
TWST transaction history
Newest filings · 20 transactions per pageLatest insider transactions
Form 4 filings from last month.Filing-only signals
Deterministic matches in the selected period
Filing detail checks
Secondary metrics for the selected periodTransaction codes
By Form 4 transaction code in selected period19transactionstxns
- S · Open-market sells · dominant19 · 100%
Activity by reported role
A joint filing can contribute to multiple rolesChief executive officer11
Chief financial officer2
SHR2
SR2
CAO1
PRES1
Reported Holdings After
Separated by insider, security, and ownership type
Leproust Emily M.Common Stock · Direct
562,760Oct 05, 2026
Green PaulaCommon Stock · Direct
106,632Oct 02, 2026
Cho DennisCommon Stock · Direct
63,789Oct 02, 2026
Laponis AdamCommon Stock · Direct
98,114Oct 09, 2026
Werner Robert F.Common Stock · Direct
42,917Oct 02, 2026
Finn Patrick JohnCommon Stock · Direct
185,088Oct 02, 2026
These are reported post-transaction holdings, not company-wide ownership percentages. Securities, indirect vehicles, and amendments are kept separate.
Filing activity heatmap
Current transaction page only · each cell is a filing date · buys green, sells redSep 19 → Oct 19
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Twist Bioscience Corp Insider Activity FAQ
SEC Form 4 contextWho recently reported transactions at Twist Bioscience Corp?
Laponis Adam, Leproust Emily M., Green Paula, Finn Patrick John, Cho Dennis, WERNER ROBERT F..
When was the latest reported open-market purchase?
No code-P purchase is available for this period.
When was the latest reported open-market sale?
Laponis Adam reported a sale on Oct 09, 2026 valued at $384k. Read the SEC filing.
What is the recent purchase and sale balance?
Net open-market selling in the selected period was $20,820,655.31. Sales can occur for many non-investment reasons.
Where can I see the original SEC filing?
Every transaction row and latest-activity fact links to its original SEC filing.
What do these Form 4 transaction codes mean?
P and S generally describe open-market or private purchases and sales. A, D, F, M, X, G, J, and V describe awards, issuer dispositions, tax withholding, exercises, gifts, other transactions, and voluntary early reports; review each filing and its footnotes for context.