Robert F. Werner is CAO at Twist Bioscience Corp (TWST). They have made 1 open-market trade across 1 company since 2026, most recently 2026-10-02.
CIK 1581280
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 1 sale. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| TWST | 42,917 | $5.7M |
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 | $280K | -31.2% | — | — |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.