Emily M. Leproust is CEO & President at Twist Bioscience Corp (TWST). They have made 83 open-market trades across 1 company since 2020, most recently 2026-10-05.
CIK 0001753655
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.
0 open-market purchases, against 83 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| TWST | 562,760 | $74.8M |
| WGS | 24,852 | $1.6M |
| SMFR | 37,836 | $12K |
| Total | $76.4M |
Shares reported on the most recent Form 4, priced at the 2026-10-07 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 · 10b5-1 | 2026-10-05 | 2026-10-07 | $202.15 | $919K | — | — | — |
| TWST | SELL · 10b5-1 | 2026-10-01 | 2026-10-05 | $189.04 | $8.8M | -31.2% | — | — |
| TWST | SELL · 10b5-1 | 2026-09-24 | 2026-09-25 | $177.38 | $923K | -14.4% | — | — |
| TWST | SELL | 2026-09-21 | 2026-09-23 | $165.49 | $279K | +30.3% | — | — |
| TWST | SELL · 10b5-1 | 2026-09-17 | 2026-09-21 | $157.99 | $56.3M | +13.7% | — | — |
| TWST | SELL | 2026-09-08 | 2026-09-10 | $122.62 | $282K | +28.0% | +18.1% | — |
| TWST | SELL · 10b5-1 | 2026-08-25 | 2026-08-27 | $151.98 | $6.3M | -17.1% | +18.4% | — |
| TWST | SELL | 2026-08-21 | 2026-08-25 | $139.07 | $923K | -16.1% | +23.7% | — |
| TWST | SELL · 10b5-1 | 2026-08-12 | 2026-08-14 | $125.08 | $2.5M | +28.1% | +15.0% | — |
| TWST | SELL · 10b5-1 | 2026-08-10 | 2026-08-12 | $125.16 | $14.2M | +12.3% | +1.5% | — |
| TWST | SELL | 2026-08-03 | 2026-08-05 | $85.32 | $435K | +12.1% | +12.4% | — |
| TWST | SELL · 10b5-1 | 2026-06-25 | 2026-06-26 | $95.00 | $1.8M | -6.2% | -13.4% | +84.5% |
| TWST | SELL | 2026-06-22 | 2026-06-24 | $87.32 | $147K | -3.4% | -4.2% | +74.8% |
| TWST | SELL | 2026-06-08 | 2026-06-10 | $69.84 | $158K | +22.8% | +31.0% | +84.8% |
| TWST | SELL · 10b5-1 | 2026-05-28 | 2026-06-01 | $67.91 | $1.1M | +10.0% | +51.6% | +106.4% |
| TWST | SELL · 10b5-1 | 2026-05-26 | 2026-05-28 | $65.19 | $3.2M | +1.0% | +42.2% | +116.8% |
| TWST | SELL | 2026-05-21 | 2026-05-26 | $53.26 | $367K | +5.6% | +47.8% | +114.9% |
| TWST | SELL | 2026-05-04 | 2026-05-06 | $57.15 | $293K | -16.4% | +16.1% | +67.0% |
| TWST | SELL · 10b5-1 | 2026-04-21 | 2026-04-23 | $65.24 | $631K | -5.0% | +8.8% | +58.0% |
| TWST | SELL | 2026-03-20 | 2026-03-24 | $43.79 | $153K | +4.8% | +20.5% | +74.3% |
| TWST | SELL | 2026-03-06 | 2026-03-10 | $46.43 | $112K | -5.1% | +10.2% | +58.0% |
| TWST | SELL | 2026-02-23 | 2026-02-25 | $46.71 | $337K | -2.1% | -9.8% | +31.5% |
| TWST | SELL | 2026-02-03 | 2026-02-05 | $46.58 | $233K | +12.7% | -0.8% | +22.2% |
| TWST | SELL | 2025-12-22 | 2025-12-23 | $34.56 | $111K | +9.1% | +33.5% | +31.6% |
| TWST | SELL | 2025-12-08 | 2025-12-10 | $32.88 | $148K | +7.8% | +8.6% | +39.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.