Insider · CIK 0001867980
Wei Jiang
Files at STAA (STAAR SURGICAL CO), WAT (WATERS CORP /DE/). First filing Mar 18, 2026, latest Mar 18, 2026.
Wei Jiang files SEC Form 4 as director at WAT (WATERS CORP /DE/), and also at STAA (STAAR SURGICAL CO). Since Mar 18, 2026, Wei Jiang has reported 1 open-market buy worth $145k and 0 open-market sells worth $0, the latest filed on Mar 18, 2026.
A track record needs three past buys with six months of prices behind them; Wei Jiang has 0, so none is measured yet.
The newest scored trade: bought $145k of WAT on Mar 16, 2026, filed Mar 18, 2026, scored 51 (moderate). In the last 12 months: 1 buy worth $145k and 0 sells worth $0.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
WAT: WATERS CORP /DE/
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 51Moderate | WATERS CORP /DE/ | $145k 500 shares | +17% | +4% from low-30% from high |
Transactions
Every row this insider has filed, 26 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 30, 2026 | WAT WATERS CORP /DE/ | AGrant or award Common Stock | +57 | $0.00 | $0 | 3,630 | 11 d ago |
| Jun 30, 2026 | WAT WATERS CORP /DE/ | AGrant or award Common Stock | +67 | $0.00 | $0 | 3,573 | Jul 2, 2026 |
| Jun 18, 2026 | STAA STAAR SURGICAL CO | MOption exercise Common Stock | +10,683 | $0.00 | $0 | 77,127 | Jun 22, 2026 |
| Jun 18, 2026 | STAA STAAR SURGICAL CO | MOption exercise Restricted Stock Unitsderivative | -10,683 | $0.00 | $0 | 0 | Jun 22, 2026 |
| Jun 18, 2026 | STAA STAAR SURGICAL CO | AGrant or award Restricted Stock Unitsderivative | +6,182 | $0.00 | $0 | 6,182 | Jun 22, 2026 |
| Mar 31, 2026 | WAT WATERS CORP /DE/ | AGrant or award Common Stock | +64 | $0.00 | $0 | 3,505 | Apr 2, 2026 |
| Mar 16, 2026 | WAT WATERS CORP /DE/ | POpen-market purchase Common Stock | +500 | $289.46 | $145k | 3,441 | Mar 18, 2026 |
| Feb 25, 2026 | WAT WATERS CORP /DE/ | AGrant or award Common Stock | +23 | $0.00 | $0 | 2,941 | Feb 27, 2026 |
| Feb 25, 2026 | WAT WATERS CORP /DE/ | AGrant or award Stock Option (Right to Buy)derivative | +57 | $0.00 | $0 | 57 | Feb 27, 2026 |
| Jan 12, 2026 | STAA STAAR SURGICAL CO | MOption exercise Common Stock | +20,967 | $0.00 | $0 | 66,444 | Jan 14, 2026 |
| Jan 12, 2026 | STAA STAAR SURGICAL CO | MOption exercise Restricted Stock Unitsderivative | -20,967 | $0.00 | $0 | 0 | Jan 14, 2026 |
| Dec 31, 2025 | WAT WATERS CORP /DE/ | AGrant or award Common Stock | +60 | $0.00 | $0 | 2,611 | Jan 5, 2026 |
| Jan 2, 2026 | WAT WATERS CORP /DE/ | AGrant or award Common Stock | +307 | $0.00 | $0 | 2,918 | Jan 5, 2026 |
| Jan 2, 2026 | WAT WATERS CORP /DE/ | AGrant or award Stock Option (Right to Buy)derivative | +828 | $0.00 | $0 | 828 | Jan 5, 2026 |
| Nov 12, 2025 | STAA STAAR SURGICAL CO | MOption exercise Common Stock | +20,967 | $0.00 | $0 | 45,477 | Nov 14, 2025 |
| Nov 12, 2025 | STAA STAAR SURGICAL CO | MOption exercise Restricted Stock Unitsderivative | -20,967 | $0.00 | $0 | 20,967 | Nov 14, 2025 |
| Sep 30, 2025 | WAT WATERS CORP /DE/ | AGrant or award Common Stock | +73 | $0.00 | $0 | 2,551 | Oct 2, 2025 |
| Aug 12, 2025 | STAA STAAR SURGICAL CO | MOption exercise Common Stock | +20,967 | $0.00 | $0 | 24,510 | Aug 13, 2025 |
| Aug 12, 2025 | STAA STAAR SURGICAL CO | MOption exercise Restricted Stock Unitsderivative | -20,967 | $0.00 | $0 | 41,934 | Aug 13, 2025 |
| Jun 30, 2025 | WAT WATERS CORP /DE/ | AGrant or award Common Stock | +68 | $0.00 | $0 | 2,479 | Jul 1, 2025 |
| Jun 18, 2025 | STAA STAAR SURGICAL CO | AGrant or award Restricted Stock Unitsderivative | +10,683 | $0.00 | $0 | 10,683 | Jun 20, 2025 |
| May 12, 2025 | STAA STAAR SURGICAL CO | AGrant or award Restricted Stock Unitsderivative | +62,901 | $0.00 | $0 | 62,901 | May 13, 2025 |
| Mar 31, 2025 | WAT WATERS CORP /DE/ | AGrant or award Common Stock | +53 | $0.00 | $0 | 2,410 | Apr 2, 2025 |
| Jan 2, 2025 | WAT WATERS CORP /DE/ | AGrant or award Common Stock | +319 | $0.00 | $0 | 2,357 | Jan 6, 2025 |
| Jan 2, 2025 | WAT WATERS CORP /DE/ | AGrant or award Stock Option (Right to Buy)derivative | +818 | $0.00 | $0 | 818 | Jan 6, 2025 |
| Dec 31, 2024 | WAT WATERS CORP /DE/ | AGrant or award Common Stock | +81 | $0.00 | $0 | 2,038 | Jan 3, 2025 |
Questions about Wei Jiang
Answered from the filings on this page, as of the latest one.
Is Wei Jiang buying or selling?
In the last 12 months Wei Jiang reported 1 open-market buy worth $145k and 0 open-market sells worth $0 on SEC Form 4; the latest was bought $145k of WAT on Mar 16, 2026. Grants, option exercises and tax withholding are not counted.
How did Wei Jiang's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Wei Jiang has 0.
Where does Wei Jiang file Form 4?
Wei Jiang has filed Form 4 at WAT (WATERS CORP /DE/); STAA (STAAR SURGICAL CO). A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.