Robert F. Werner is CAO at Twist Bioscience Corp (TWST). They have made 47 open-market trades across 2 companies since 2020, most recently 2026-09-08.
CIK 0001590947
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 47 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| TWST | 44,399 | $5.9M |
| NVTA | 354,748 | $32K |
| Total | $5.9M |
Shares reported on the most recent Form 4, priced at the 2026-09-10 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 | 2026-09-08 | 2026-09-10 | $122.62 | $29K | +28.0% | +18.1% | — |
| TWST | SELL | 2026-08-21 | 2026-08-25 | $140.02 | $213K | -16.1% | +23.7% | — |
| TWST | SELL | 2026-08-03 | 2026-08-05 | $85.32 | $14K | +12.1% | +12.4% | — |
| TWST | SELL | 2026-06-08 | 2026-06-10 | $69.20 | $94K | +22.8% | +31.0% | +84.8% |
| TWST | SELL | 2026-05-26 | 2026-05-28 | $62.48 | $50K | +1.0% | +42.2% | +116.8% |
| TWST | SELL | 2026-05-21 | 2026-05-26 | $53.26 | $37K | +5.6% | +47.8% | +114.9% |
| TWST | SELL | 2026-05-08 | 2026-05-12 | $56.88 | $282K | +9.8% | +34.4% | +126.2% |
| TWST | SELL | 2026-05-04 | 2026-05-06 | $57.15 | $9K | -16.4% | +16.1% | +67.0% |
| TWST | SELL | 2026-03-06 | 2026-03-10 | $46.43 | $11K | -5.1% | +10.2% | +58.0% |
| TWST | SELL | 2026-02-23 | 2026-02-25 | $46.71 | $79K | -2.1% | -9.8% | +31.5% |
| TWST | SELL | 2026-02-03 | 2026-02-05 | $45.67 | $328K | +12.7% | -0.8% | +22.2% |
| TWST | SELL | 2025-12-08 | 2025-12-10 | $32.88 | $8K | +7.8% | +8.6% | +39.6% |
| TWST | SELL | 2025-11-21 | 2025-11-25 | $28.23 | $30K | +3.9% | +6.6% | +55.1% |
| TWST | SELL | 2025-11-03 | 2025-11-05 | $32.08 | $5K | -14.4% | +4.5% | +49.9% |
| TWST | SELL | 2025-10-30 | 2025-11-03 | $31.44 | $32K | -3.5% | +0.5% | +51.0% |
| TWST | SELL | 2025-10-06 | 2025-10-08 | $32.19 | $131K | -0.0% | -7.6% | +12.6% |
| TWST | SELL | 2025-09-08 | 2025-09-10 | $25.76 | $6K | +14.5% | +28.4% | +30.0% |
| TWST | SELL | 2025-08-25 | 2025-08-27 | $27.69 | $24K | -8.1% | -1.5% | +13.9% |
| TWST | SELL | 2025-08-21 | 2025-08-25 | $25.96 | $6K | -6.3% | -1.7% | +6.7% |
| TWST | SELL | 2025-08-04 | 2025-08-06 | $28.36 | $5K | +7.8% | -0.9% | +15.6% |
| TWST | SELL | 2025-06-06 | 2025-06-10 | $31.75 | $7K | +1.3% | +10.4% | -24.7% |
| TWST | SELL | 2025-05-23 | 2025-05-28 | $27.73 | $23K | +16.8% | +25.8% | -3.0% |
| TWST | SELL | 2025-05-21 | 2025-05-23 | $29.75 | $7K | +4.4% | +21.6% | -8.9% |
| TWST | SELL | 2025-05-05 | 2025-05-07 | $37.65 | $6K | -7.2% | -3.6% | -15.9% |
| TWST | SELL | 2025-03-06 | 2025-03-10 | $40.91 | $10K | +15.1% | +10.2% | -8.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.