Insider txns (12m)
75
Stock / equity
WAT WATERS CORP /DE/
- Company
- WATERS CORP /DE/
- Security
- Equity
- Size, estimated from filings
- Large cap ($10B – $200B)
- Insiders on record
- 14
- Members of Congress
- 6
- Latest trade on record
- September 30, 2026
WAT (WATERS CORP /DE/) has 75 disclosed insider transactions from 14 insiders in the last 12 months (2 open-market buys, 12 sales, about $5.1M at reported prices) and 10 congressional trades from 6 members of Congress. The most recent disclosure was filed October 2, 2026.
Open-market buys / sales
2 / 12
Congress trades (12m)
10
Distinct filers (12m)
20
Share price
Price and chart by TradingView for WATERS CORP /DE/. US share prices here are delayed, not real-time. The trade records on this page come from government filings, not from this chart.
WAT in charts
Who is trading this stock
Which people account for the buying and selling over the last 12 months?
BoughtSold
8 people account for the disclosed buying and selling in WAT over the last 12 months; the most active is KUEBLER CHRISTOPHER A with $1.9M.
Prices insiders traded at
What price did insiders buy and sell at? Each marker is one open-market trade at the share price reported on its Form 4.
▲ Bought▼ SoldAverage reported price that day
Insiders reported 3 open-market trades in WAT since Mar 6, 2026, at prices from $289 to $398; the most recent was a sale at $398 on Aug 6, 2026. These are the prices on the filings, not adjusted for stock splits, and not a market price series.
Insider holdings over time
Is an insider building or unwinding a position? Shares held directly after each filing.
Jiang WeiKnight Heather
Jiang Wei reported 3,630 shares held after the latest filing, against 2,551 at the first on record.
Insiders trading WAT
Everyone who filed a Form 4 for this ticker, by number of rows on record. "Bought" and "sold" count open-market purchases (code P) and sales only; awards, option exercises and shares withheld for tax are in the row count but not in those two columns.
| Insider | Role | Rows | Bought | Sold | Value bought | Value sold | Latest |
|---|---|---|---|---|---|---|---|
| Jiang Wei | Director | 10 | 1 | 0 | $145K | — | September 30, 2026 |
| KUEBLER CHRISTOPHER A | Director | 10 | 0 | 2 | — | $1.9M | August 6, 2026 |
| Knight Heather | Director | 9 | 0 | 0 | — | — | September 30, 2026 |
| Chaubal Amol | SVP & Chief Financial Officer | 6 | 0 | 3 | — | $324K | May 12, 2026 |
| Bennett Jianqing | SVP TA Instruments Division | 6 | 0 | 3 | — | $234K | April 6, 2026 |
| FEARON RICHARD H | Director | 5 | 1 | 0 | $306K | — | March 6, 2026 |
| Batra Udit | President and CEO | 5 | 0 | 2 | — | $1.1M | March 2, 2026 |
| Carpio Robert L III | SVP, Waters Division | 4 | 0 | 2 | — | $84K | June 24, 2026 |
| BADDOUR LINDA | Director | 4 | 0 | 0 | — | — | February 25, 2026 |
| Brennan Daniel J. | Director | 4 | 0 | 0 | — | — | February 25, 2026 |
| Huang Pearl S | Director | 4 | 0 | 0 | — | — | February 25, 2026 |
| Ornskov Flemming | Director | 4 | 0 | 0 | — | — | February 25, 2026 |
| Vergnano Mark | Director | 4 | 0 | 0 | — | — | February 25, 2026 |
| Fraser Claire | Director | 2 | 0 | 0 | — | — | February 25, 2026 |
What kind of transactions these are 5 Form 4 codes
| Code | Meaning | Rows | Shares | Value at reported prices |
|---|---|---|---|---|
| A | Grant or award | 59 | 74,187 | — |
| F | Shares withheld for tax | 11 | 6,941 | $2.3M |
| M | Option exercise or conversion | 4 | 14,774 | $985K |
| P | Open-market purchase | 2 | 1,500 | $451K |
| S | Open-market sale | 1 | 3,626 | $1.4M |
What each code means: Form 4 transaction codes.
Members of Congress trading WAT
Members whose periodic transaction reports name this ticker. Amounts are the sums of the ranges as filed.
| Member | Seat | Trades | Bought | Sold | Range as filed | Latest |
|---|---|---|---|---|---|---|
| Julia Letlow | Representative (LA, District 5), Republican | 3 | 2 | 1 | $3,003–$45K | December 8, 2025 |
| Kevin Hern | Representative (OK, District 1), Republican | 2 | 0 | 1 | $2,002–$30K | August 13, 2026 |
| Gilbert Ray Cisneros, Jr. | Representative (CA, District 31), Democrat | 2 | 2 | 0 | $2,002–$30K | March 18, 2026 |
| Thomas H. Kean, Jr. | Representative (NJ, District 7), Republican | 2 | 0 | 2 | $2,002–$30K | March 10, 2026 |
| Debbie Dingell | Representative (MI, District 6), Democrat | 1 | 0 | 0 | $1,001–$15K | February 10, 2026 |
| Tommy Tuberville | Senator (AL), Republican | 1 | 0 | 1 | $1,001–$15K | May 3, 2024 |
Insider transactions
| Filer | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| Knight Heather | Other A | September 30, 2026 | October 2, 2026 | 2d | 57 | — | — | Form 4 ↗ | ||
| Jiang Wei | Other A | September 30, 2026 | October 2, 2026 | 2d | 57 | — | — | Form 4 ↗ | ||
| KUEBLER CHRISTOPHER A | Option / conversion M | August 6, 2026 | August 7, 2026 | 1d | 3,626 | — | — | derivative | Form 4 ↗ | |
| KUEBLER CHRISTOPHER A | Sell S | August 6, 2026 | August 7, 2026 | 1d | 3,626 | $398 | $1.4M | Form 4 ↗ | ||
| KUEBLER CHRISTOPHER A | Option / conversion M | August 6, 2026 | August 7, 2026 | 1d | 3,626 | $136 | $495K | Form 4 ↗ | ||
| Knight Heather | Other A | June 30, 2026 | July 2, 2026 | 2d | 63 | — | — | Form 4 ↗ | ||
| Jiang Wei | Other A | June 30, 2026 | July 2, 2026 | 2d | 67 | — | — | Form 4 ↗ | ||
| Carpio Robert L III | Sell F | June 24, 2026 | June 25, 2026 | 1d | 189 | $369 | $70K | Form 4 ↗ | ||
| Chaubal Amol | Sell F | May 12, 2026 | May 14, 2026 | 2d | 239 | $352 | $84K | Form 4 ↗ | ||
| Bennett Jianqing | Sell F | April 6, 2026 | April 7, 2026 | 1d | 302 | $304 | $92K | Form 4 ↗ | ||
| Jiang Wei | Other A | March 31, 2026 | April 2, 2026 | 2d | 64 | — | — | Form 4 ↗ | ||
| Knight Heather | Other A | March 31, 2026 | April 2, 2026 | 2d | 68 | — | — | Form 4 ↗ | ||
| Jiang Wei | Buy P | March 16, 2026 | March 18, 2026 | 2d | 500 | $289 | $145K | Form 4 ↗ | ||
| FEARON RICHARD H | Buy P | March 6, 2026 | March 10, 2026 | 4d | 1,000 | $306 | $306K | Form 4 ↗ | ||
| Batra Udit | Sell F | March 2, 2026 | March 3, 2026 | 1d | 3,417 | $307 | $1.0M | Form 4 ↗ | ||
| Chaubal Amol | Sell F | March 2, 2026 | March 3, 2026 | 1d | 709 | $307 | $218K | Form 4 ↗ | ||
| Bennett Jianqing | Sell F | March 2, 2026 | March 3, 2026 | 1d | 410 | $307 | $126K | Form 4 ↗ | ||
| Carpio Robert L III | Other A | February 25, 2026 | February 27, 2026 | 2d | 4,884 | — | — | derivative | Form 4 ↗ | |
| Carpio Robert L III | Other A | February 25, 2026 | February 27, 2026 | 2d | 997 | — | — | Form 4 ↗ | ||
| Bennett Jianqing | Other A | February 25, 2026 | February 27, 2026 | 2d | 4,826 | — | — | derivative | Form 4 ↗ | |
| Bennett Jianqing | Other A | February 25, 2026 | February 27, 2026 | 2d | 986 | — | — | Form 4 ↗ | ||
| Chaubal Amol | Other A | February 25, 2026 | February 27, 2026 | 2d | 7,125 | — | — | derivative | Form 4 ↗ | |
| Chaubal Amol | Other A | February 25, 2026 | February 27, 2026 | 2d | 1,455 | — | — | Form 4 ↗ | ||
| Batra Udit | Other A | February 25, 2026 | February 27, 2026 | 2d | 25,283 | — | — | derivative | Form 4 ↗ | |
| Batra Udit | Other A | February 25, 2026 | February 27, 2026 | 2d | 5,165 | — | — | Form 4 ↗ | ||
| Vergnano Mark | Other A | February 25, 2026 | February 27, 2026 | 2d | 57 | — | — | derivative | Form 4 ↗ | |
| Vergnano Mark | Other A | February 25, 2026 | February 27, 2026 | 2d | 23 | — | — | Form 4 ↗ | ||
| KUEBLER CHRISTOPHER A | Other A | February 25, 2026 | February 27, 2026 | 2d | 57 | — | — | derivative | Form 4 ↗ | |
| KUEBLER CHRISTOPHER A | Other A | February 25, 2026 | February 27, 2026 | 2d | 23 | — | — | Form 4 ↗ | ||
| Knight Heather | Other A | February 25, 2026 | February 27, 2026 | 2d | 57 | — | — | derivative | Form 4 ↗ | |
| Knight Heather | Other A | February 25, 2026 | February 27, 2026 | 2d | 23 | — | — | Form 4 ↗ | ||
| Jiang Wei | Other A | February 25, 2026 | February 27, 2026 | 2d | 57 | — | — | derivative | Form 4 ↗ | |
| Jiang Wei | Other A | February 25, 2026 | February 27, 2026 | 2d | 23 | — | — | Form 4 ↗ | ||
| Huang Pearl S | Other A | February 25, 2026 | February 27, 2026 | 2d | 57 | — | — | derivative | Form 4 ↗ | |
| Huang Pearl S | Other A | February 25, 2026 | February 27, 2026 | 2d | 23 | — | — | Form 4 ↗ | ||
| Fraser Claire | Other A | February 25, 2026 | February 27, 2026 | 2d | 877 | — | — | derivative | Form 4 ↗ | |
| Fraser Claire | Other A | February 25, 2026 | February 27, 2026 | 2d | 358 | — | — | Form 4 ↗ | ||
| FEARON RICHARD H | Other A | February 25, 2026 | February 27, 2026 | 2d | 57 | — | — | derivative | Form 4 ↗ | |
| FEARON RICHARD H | Other A | February 25, 2026 | February 27, 2026 | 2d | 23 | — | — | Form 4 ↗ | ||
| Brennan Daniel J. | Other A | February 25, 2026 | February 27, 2026 | 2d | 57 | — | — | derivative | Form 4 ↗ | |
| Brennan Daniel J. | Other A | February 25, 2026 | February 27, 2026 | 2d | 23 | — | — | Form 4 ↗ | ||
| BADDOUR LINDA | Other A | February 25, 2026 | February 27, 2026 | 2d | 57 | — | — | derivative | Form 4 ↗ | |
| BADDOUR LINDA | Other A | February 25, 2026 | February 27, 2026 | 2d | 23 | — | — | Form 4 ↗ | ||
| Ornskov Flemming | Other A | February 25, 2026 | February 27, 2026 | 2d | 57 | — | — | derivative | Form 4 ↗ | |
| Ornskov Flemming | Other A | February 25, 2026 | February 27, 2026 | 2d | 336 | — | — | Form 4 ↗ | ||
| Carpio Robert L III | Sell F | February 5, 2026 | February 6, 2026 | 1d | 38 | $377 | $14K | Form 4 ↗ | ||
| Bennett Jianqing | Sell F | February 5, 2026 | February 6, 2026 | 1d | 43 | $377 | $16K | Form 4 ↗ | ||
| Bennett Jianqing | Other A | February 4, 2026 | February 6, 2026 | 2d | 1,385 | — | — | Form 4 ↗ | ||
| Chaubal Amol | Sell F | February 5, 2026 | February 6, 2026 | 1d | 58 | $377 | $22K | Form 4 ↗ | ||
| Chaubal Amol | Other A | February 4, 2026 | February 6, 2026 | 2d | 1,884 | — | — | Form 4 ↗ | ||
| Batra Udit | Sell F | February 5, 2026 | February 6, 2026 | 1d | 218 | $377 | $82K | Form 4 ↗ | ||
| Batra Udit | Other A | February 4, 2026 | February 6, 2026 | 2d | 7,066 | — | — | Form 4 ↗ | ||
| Vergnano Mark | Other A | January 2, 2026 | January 5, 2026 | 3d | 828 | — | — | derivative | Form 4 ↗ | |
| Vergnano Mark | Other A | January 2, 2026 | January 5, 2026 | 3d | 307 | — | — | Form 4 ↗ | ||
| KUEBLER CHRISTOPHER A | Other A | January 2, 2026 | January 5, 2026 | 3d | 828 | — | — | derivative | Form 4 ↗ | |
| KUEBLER CHRISTOPHER A | Other A | January 2, 2026 | January 5, 2026 | 3d | 307 | — | — | Form 4 ↗ | ||
| Huang Pearl S | Other A | January 2, 2026 | January 5, 2026 | 3d | 828 | — | — | derivative | Form 4 ↗ | |
| Huang Pearl S | Other A | January 2, 2026 | January 5, 2026 | 3d | 307 | — | — | Form 4 ↗ | ||
| FEARON RICHARD H | Other A | January 2, 2026 | January 5, 2026 | 3d | 828 | — | — | derivative | Form 4 ↗ | |
| FEARON RICHARD H | Other A | January 2, 2026 | January 5, 2026 | 3d | 307 | — | — | Form 4 ↗ | ||
| Brennan Daniel J. | Other A | January 2, 2026 | January 5, 2026 | 3d | 828 | — | — | derivative | Form 4 ↗ | |
| Brennan Daniel J. | Other A | January 2, 2026 | January 5, 2026 | 3d | 307 | — | — | Form 4 ↗ | ||
| BADDOUR LINDA | Other A | January 2, 2026 | January 5, 2026 | 3d | 828 | — | — | derivative | Form 4 ↗ | |
| BADDOUR LINDA | Other A | January 2, 2026 | January 5, 2026 | 3d | 307 | — | — | Form 4 ↗ | ||
| Ornskov Flemming | Other A | January 2, 2026 | January 5, 2026 | 3d | 828 | — | — | derivative | Form 4 ↗ | |
| Ornskov Flemming | Other A | January 2, 2026 | January 5, 2026 | 3d | 307 | — | — | Form 4 ↗ | ||
| Jiang Wei | Other A | January 2, 2026 | January 5, 2026 | 3d | 828 | — | — | derivative | Form 4 ↗ | |
| Jiang Wei | Other A | January 2, 2026 | January 5, 2026 | 3d | 307 | — | — | Form 4 ↗ | ||
| Jiang Wei | Other A | December 31, 2025 | January 5, 2026 | 5d | 60 | — | — | late | Form 4 ↗ | |
| Knight Heather | Other A | January 2, 2026 | January 5, 2026 | 3d | 828 | — | — | derivative | Form 4 ↗ | |
| Knight Heather | Other A | January 2, 2026 | January 5, 2026 | 3d | 307 | — | — | Form 4 ↗ | ||
| Knight Heather | Other A | December 31, 2025 | January 5, 2026 | 5d | 60 | — | — | late | Form 4 ↗ | |
| KUEBLER CHRISTOPHER A | Option / conversion M | November 5, 2025 | November 7, 2025 | 2d | 3,761 | — | — | derivative | Form 4 ↗ | |
| KUEBLER CHRISTOPHER A | Sell F | November 5, 2025 | November 7, 2025 | 2d | 1,318 | $372 | $490K | Form 4 ↗ | ||
| KUEBLER CHRISTOPHER A | Option / conversion M | November 5, 2025 | November 7, 2025 | 2d | 3,761 | $130 | $490K | Form 4 ↗ | ||
| Knight Heather | Other A | September 30, 2025 | October 2, 2025 | 2d | 78 | — | — | Form 4 ↗ | ||
| Jiang Wei | Other A | September 30, 2025 | October 2, 2025 | 2d | 73 | — | — | Form 4 ↗ |
Congressional trades
| Filer | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| Kevin Hern | Sell | August 13, 2026 | September 1, 2026 | 19d | — | — | $1,001–$15K | joint | House PTR ↗ | |
| Tommy Tuberville | Sell | May 3, 2024 | August 5, 2026 | — | — | — | $1,001–$15K | joint | Senate PTR ↗ | |
| Thomas H. Kean, Jr. | Sell | March 10, 2026 | April 13, 2026 | 34d | — | — | $1,001–$15K | House PTR ↗ | ||
| Gilbert Ray Cisneros, Jr. | Buy | March 18, 2026 | April 7, 2026 | 20d | — | — | $1,001–$15K | House PTR ↗ | ||
| Thomas H. Kean, Jr. | Sell | February 13, 2026 | March 18, 2026 | 33d | — | — | $1,001–$15K | House PTR ↗ | ||
| Kevin Hern | Exchange | February 9, 2026 | March 6, 2026 | 25d | — | — | $1,001–$15K | joint | House PTR ↗ | |
| Debbie Dingell | Exchange | February 10, 2026 | February 23, 2026 | 13d | — | — | $1,001–$15K | House PTR ↗ | ||
| Julia Letlow | Buy | December 8, 2025 | January 13, 2026 | 36d | — | — | $1,001–$15K | House PTR ↗ | ||
| Julia Letlow | Sell | November 19, 2024 | January 13, 2026 | 420d | — | — | $1,001–$15K | late | House PTR ↗ | |
| Julia Letlow | Buy | October 23, 2024 | January 13, 2026 | 447d | — | — | $1,001–$15K | late | House PTR ↗ | |
| Gilbert Ray Cisneros, Jr. | Buy | September 30, 2025 | October 10, 2025 | 10d | — | — | $1,001–$15K | House PTR ↗ |
Related stocks
Tickers traded by the same people who traded WAT, by number of filers in common. It shows overlap in public filings and nothing else.
- AAPL Apple Inc. - Common Stock 5 filers in common
- MSFT Microsoft Corporation - Common Stock 5 filers in common
- ADBE Adobe Inc. - Common Stock 4 filers in common
- ACN Accenture plc Class A Ordinary Shares 4 filers in common
- CVX Chevron Corporation Common Stock 4 filers in common
- GOOGL Alphabet Inc. - Class A Common Stock 4 filers in common
- PG Procter & Gamble Company 4 filers in common
- HON Honeywell International Inc. 4 filers in common
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- How to read a congressional trade report Owner tells you whose asset it was: the member, the spouse, a dependent child, or held jointly.
- Why congressional trade amounts are ranges There are ten ranges; the lowest is $1,001–$15,000 and the highest is over $50,000,000.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| House Clerk, periodic transaction reports | 8 | 10 | October 10, 2025 | September 1, 2026 | House Clerk search |
| Senate eFD, periodic transaction reports | 1 | 1 | August 5, 2026 | August 5, 2026 | Senate eFD search |
| SEC EDGAR, Form 4 | 45 | 77 | October 2, 2025 | October 2, 2026 | Form 4 list on EDGAR |
Site built October 22, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Insider rows are Form 4 filings for this issuer from SEC EDGAR; congressional rows are periodic transaction reports parsed from the House Clerk and the Senate eFD. Values use the reported price for Form 4 and the disclosed range for Congress. See methodology and corrections.
Not investment advice. Disclosures are shown as filed and may lag the trade or be amended. No recommendation is made or implied.