Dennis Cho files SEC Form 4 disclosures for Twist Bioscience Corp. They have made 60 open-market trades across 1 company since 2023, most recently 2026-10-02.
CIK 0001883451
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
1 open-market purchase totalling $132K since 2023, against 59 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| TWST | 63,789 | $8.5M |
Shares reported on the most recent Form 4, priced at the 2026-10-05 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| TWST | SELL | 2026-10-02 | 2026-10-05 | $188.88 | $1.8M | -31.2% | — | — |
| TWST | SELL | 2026-09-21 | 2026-09-23 | $165.49 | $58K | +30.3% | — | — |
| TWST | SELL | 2026-09-08 | 2026-09-10 | $122.62 | $51K | +28.0% | +18.1% | — |
| TWST | SELL | 2026-08-21 | 2026-08-25 | $139.07 | $222K | -16.1% | +23.7% | — |
| TWST | SELL · 10b5-1 | 2026-08-19 | 2026-08-21 | $129.75 | $1.8M | -9.0% | +15.1% | — |
| TWST | SELL · 10b5-1 | 2026-08-05 | 2026-08-07 | $109.75 | $1.6M | +24.7% | +12.1% | — |
| TWST | SELL | 2026-08-03 | 2026-08-05 | $85.32 | $91K | +12.1% | +12.4% | — |
| TWST | SELL · 10b5-1 | 2026-06-24 | 2026-06-26 | $89.75 | $1.3M | -6.2% | -13.4% | +84.5% |
| TWST | SELL | 2026-06-22 | 2026-06-24 | $87.32 | $30K | -3.4% | -4.2% | +74.8% |
| TWST | SELL | 2026-06-08 | 2026-06-10 | $69.84 | $28K | +22.8% | +31.0% | +84.8% |
| TWST | SELL · 10b5-1 | 2026-05-29 | 2026-06-02 | $69.75 | $991K | +8.8% | +41.8% | +98.8% |
| TWST | SELL | 2026-05-21 | 2026-05-26 | $53.26 | $87K | +5.6% | +47.8% | +114.9% |
| TWST | SELL | 2026-05-04 | 2026-05-06 | $57.15 | $112K | -16.4% | +16.1% | +67.0% |
| TWST | SELL | 2026-03-20 | 2026-03-24 | $43.79 | $31K | +4.8% | +20.5% | +74.3% |
| TWST | SELL | 2026-03-06 | 2026-03-10 | $46.43 | $20K | -5.1% | +10.2% | +58.0% |
| TWST | SELL | 2026-02-23 | 2026-02-25 | $46.71 | $39K | -2.1% | -9.8% | +31.5% |
| TWST | SELL · 10b5-1 | 2026-02-11 | 2026-02-13 | $49.93 | $250K | -0.3% | -7.9% | +8.4% |
| TWST | SELL | 2026-02-03 | 2026-02-05 | $46.58 | $51K | +12.7% | -0.8% | +22.2% |
| TWST | SELL | 2025-12-22 | 2025-12-23 | $34.56 | $11K | +9.1% | +33.5% | +31.6% |
| TWST | SELL | 2025-12-08 | 2025-12-10 | $32.88 | $13K | +7.8% | +8.6% | +39.6% |
| TWST | SELL | 2025-11-21 | 2025-11-25 | $26.50 | $20K | +3.9% | +6.6% | +55.1% |
| TWST | SELL | 2025-11-03 | 2025-11-05 | $32.08 | $33K | -14.4% | +4.5% | +49.9% |
| TWST | SELL | 2025-10-30 | 2025-11-03 | $31.44 | $410K | -3.5% | +0.5% | +51.0% |
| TWST | SELL | 2025-10-06 | 2025-10-08 | $32.19 | $250K | -0.0% | -7.6% | +12.6% |
| TWST | SELL | 2025-10-02 | 2025-10-06 | $29.16 | $4K | -4.3% | -1.9% | +6.8% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.