Wei Jiang is Director at WATERS CORP /DE/ (WAT). They have made 1 open-market trade across 1 company since 2026, most recently 2026-09-30.
CIK 0001867980
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 $145K since 2026, never a sale. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| STAA | 77,127 | $1.6M |
| WAT | 3,630 | $1.6M |
| Total | $3.2M |
Shares reported on the most recent Form 4, priced at the 2026-10-02 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 |
|---|---|---|---|---|---|---|---|---|
| WAT | BUY | 2026-03-16 | 2026-03-18 | $289.46 | $145K | -0.1% | +11.5% | +22.8% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.