Dennis Cho insider trades: Twist Bioscience (TWST) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Dennis reports to the SEC
Open-market buys and sales
63 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Nov 3, 2026 | TWST | ↓ Sell | 949 | $135.40 | $128K | Direct | Nov 5, 2026 (2d) |
| Oct 2, 2026 | TWST | ↓ Sell | 9,514 | $188.88 | $1.8M | Direct | Oct 5, 2026 (3d) |
| Sep 21, 2026 | TWST | ↓ Sell | 348 | $165.49 | $58K | Direct | Sep 23, 2026 (2d) |
| Aug 21, 2026 | TWST | ↓ Sell | 1,598 | $139.07 | $222K | Direct | Aug 25, 2026 (4d) |
| Aug 19, 2026 | TWST | ↓ Sell10b5-1 | 14,205 | $129.75 | $1.8M | Direct | Aug 21, 2026 (2d) |
| Aug 5, 2026 | TWST | ↓ Sell10b5-1 | 14,205 | $109.75 | $1.6M | Direct | Aug 7, 2026 (2d) |
| Aug 3, 2026 | TWST | ↓ Sell | 1,070 | $85.32 | $91K | Direct | Aug 5, 2026 (2d) |
| Jun 22, 2026 | TWST | ↓ Sell | 346 | $87.32 | $30K | Direct | Jun 24, 2026 (2d) |
| Jun 8, 2026 | TWST | ↓ Sell | 402 | $69.84 | $28K | Direct | Jun 10, 2026 (2d) |
| May 29, 2026 | TWST | ↓ Sell10b5-1 | 14,205 | $69.75 | $991K | Direct | Jun 2, 2026 (4d) |
| May 21, 2026 | TWST | ↓ Sell | 1,642 | $53.26 | $87K | Direct | May 26, 2026 (5d) |
| May 4, 2026 | TWST | ↓ Sell | 1,962 | $57.15 | $112K | Direct | May 6, 2026 (2d) |
| Mar 20, 2026 | TWST | ↓ Sell | 354 | $43.79 | $16K | Direct | Mar 24, 2026 (4d) |
| Mar 6, 2026 | TWST | ↓ Sell | 425 | $46.43 | $20K | Direct | Mar 10, 2026 (4d) |
| Feb 23, 2026 | TWST | ↓ Sell | 844 | $46.71 | $39K | Direct | Feb 25, 2026 (2d) |
| Feb 3, 2026 | TWST | ↓ Sell | 1,099 | $46.58 | $51K | Direct | Feb 5, 2026 (2d) |
| Dec 22, 2025 | TWST | ↓ Sell | 324 | $34.56 | $11K | Direct | Dec 23, 2025 (1d) |
| Dec 8, 2025 | TWST | ↓ Sell | 398 | $32.88 | $13K | Direct | Dec 10, 2025 (2d) |
| Nov 21, 2025 | TWST | ↓ Sell | 757 | $26.50 | $20K | Direct | Nov 25, 2025 (4d) |
| Nov 3, 2025 | TWST | ↓ Sell | 1,019 | $32.08 | $33K | Direct | Nov 5, 2025 (2d) |
| Oct 30, 2025 | TWST | ↓ Sell | 6,515 | $31.44 | $205K | Direct | Nov 3, 2025 (4d) |
| Oct 6, 2025 | TWST | ↓ Sell | 3,876 | $32.19 | $125K | Direct | Oct 8, 2025 (2d) |
| Oct 2, 2025 | TWST | ↓ Sell | 124 | $29.16 | $4K | Direct | Oct 6, 2025 (4d) |
| Sep 22, 2025 | TWST | ↓ Sell | 233 | $27.56 | $6K | Direct | Sep 24, 2025 (2d) |
| Sep 15, 2025 | TWST | ↓ Sell | 94 | $25.33 | $2K | Direct | Sep 17, 2025 (2d) |
| Sep 8, 2025 | TWST | ↓ Sell | 269 | $25.76 | $7K | Direct | Sep 10, 2025 (2d) |
| Aug 21, 2025 | TWST | ↓ Sell | 521 | $25.96 | $14K | Direct | Aug 25, 2025 (4d) |
| Aug 4, 2025 | TWST | ↓ Sell | 785 | $28.36 | $22K | Direct | Aug 6, 2025 (2d) |
| Jul 2, 2025 | TWST | ↓ Sell | 125 | $36.19 | $5K | Direct | Jul 7, 2025 (5d) |
| Jun 20, 2025 | TWST | ↓ Sell | 230 | $35.76 | $8K | Direct | Jun 24, 2025 (4d) |
| Jun 16, 2025 | TWST | ↓ Sell | 94 | $33.48 | $3K | Direct | Jun 18, 2025 (2d) |
| Jun 6, 2025 | TWST | ↓ Sell | 257 | $31.75 | $8K | Direct | Jun 10, 2025 (4d) |
| May 21, 2025 | TWST | ↓ Sell | 531 | $29.75 | $16K | Direct | May 23, 2025 (2d) |
| May 7, 2025 | TWST | ↓ Sell | 5,000 | $32.72 | $164K | Direct | May 9, 2025 (2d) |
| May 5, 2025 | TWST | ↓ Sell | 689 | $37.65 | $26K | Direct | May 7, 2025 (2d) |
| Apr 2, 2025 | TWST | ↓ Sell | 124 | $38.73 | $5K | Direct | Apr 4, 2025 (2d) |
| Mar 20, 2025 | TWST | ↓ Sell | 230 | $41.68 | $10K | Direct | Mar 24, 2025 (4d) |
| Mar 14, 2025 | TWST | ↓ Sell | 92 | $40.05 | $4K | Direct | Mar 18, 2025 (4d) |
| Mar 6, 2025 | TWST | ↓ Sell | 277 | $40.91 | $11K | Direct | Mar 10, 2025 (4d) |
| Feb 21, 2025 | TWST | ↓ Sell | 526 | $44.18 | $23K | Direct | Feb 25, 2025 (4d) |
| Feb 3, 2025 | TWST | ↓ Sell | 806 | $49.35 | $40K | Direct | Feb 5, 2025 (2d) |
| Jan 3, 2025 | TWST | ↓ Sell | 144 | $45.59 | $7K | Direct | Jan 7, 2025 (4d) |
| Dec 20, 2024 | TWST | ↓ Sell | 316 | $44.90 | $14K | Direct | Dec 26, 2024 (6d) |
| Dec 16, 2024 | TWST | ↓ Sell | 133 | $46.81 | $6K | Direct | Dec 18, 2024 (2d) |
| Dec 6, 2024 | TWST | ↓ Sell | 367 | $52.70 | $19K | Direct | Dec 10, 2024 (4d) |
| Nov 11, 2024 | TWST | ↓ Sell | 1,507 | $48.00 | $72K | Direct | Nov 13, 2024 (2d) |
| Nov 6, 2024 | TWST | ↓ Sell | 1,811 | $44.60 | $81K | Direct | Nov 8, 2024 (2d) |
| Nov 4, 2024 | TWST | ↓ Sell | 659 | $41.56 | $27K | Direct | Nov 6, 2024 (2d) |
| Oct 2, 2024 | TWST | ↓ Sell | 3,104 | $43.21 | $134K | Direct | Oct 4, 2024 (2d) |
| Sep 20, 2024 | TWST | ↓ Sell | 234 | $46.94 | $11K | Direct | Sep 24, 2024 (4d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other TWST insiders
Open-market trades in the last 12 months
About Dennis Cho's insider trades
Dennis Cho is See Remarks at Twist Bioscience (TWST). Since May 10, 2023, Dennis has reported 1 open-market purchase worth $132K and 62 sales worth $8.4M on SEC Form 4. In the last 12 months: 19 sales ($7.1M).
3 sales (53% of the value sold) were made under a Rule 10b5-1 trading plan, which is set up months in advance and runs on a schedule, so they say little about how the insider sees the stock today.
Their filings also include shares withheld for taxes (23 filings), grants and awards (9 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every TWST insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.