Company / CIK 0001000697
WATERS CORP /DE/
- Ticker
- WAT
- Size, estimated from filings
- Large cap ($10B – $200B)
- Insiders on file
- 14
- Members of Congress who traded it
- 6
- Federal contracts on record
- none matched
- Lobbying filings on record
- none matched
- SEC filings
- EDGAR ↗
- Latest trade on record
- September 30, 2026
WATERS CORP /DE/ (WAT) has 14 insiders on file who disclosed 75 transactions in the last 12 months (2 open-market buys, 12 sales, about $5.1M at reported prices), and 11 congressional trades in its stock are on record. No federal contract award that started in the last 180 days was found for a recipient with exactly this name; no lobbying filing names it as client this year.
WATERS CORP /DE/ 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 WATERS CORP /DE/ over the last 12 months; the most active is KUEBLER CHRISTOPHER A with $1.9M.
Insiders
| Name | Role | Rows | Bought | Sold | Last filed |
|---|---|---|---|---|---|
| Jiang Wei | Director | 10 | 1 | 0 | October 2, 2026 |
| Knight Heather | Director | 9 | 0 | 0 | October 2, 2026 |
| FEARON RICHARD H | Director | 5 | 1 | 0 | October 2, 2026 |
| KUEBLER CHRISTOPHER A | Director | 10 | 0 | 2 | August 7, 2026 |
| Carpio Robert L III | SVP, Waters Division | 4 | 0 | 2 | June 25, 2026 |
| Chaubal Amol | SVP & Chief Financial Officer | 6 | 0 | 3 | May 14, 2026 |
| Bennett Jianqing | SVP TA Instruments Division | 6 | 0 | 3 | April 7, 2026 |
| Vergnano Mark | Director | 4 | 0 | 0 | March 6, 2026 |
| Batra Udit | President and CEO | 5 | 0 | 2 | March 3, 2026 |
| Ornskov Flemming | Director | 4 | 0 | 0 | February 27, 2026 |
| BADDOUR LINDA | Director | 4 | 0 | 0 | February 27, 2026 |
| Brennan Daniel J. | Director | 4 | 0 | 0 | February 27, 2026 |
| Huang Pearl S | Director | 4 | 0 | 0 | February 27, 2026 |
| Fraser Claire | Director | 2 | 0 | 0 | February 27, 2026 |
Rows are this company's Form 4 rows for each person. "Bought" and "sold" count open-market purchases (code P) and sales only. More in insider buying and insider selling.
Members of Congress who traded WAT
From periodic transaction reports that name the company's stock. Amounts are the sums of the ranges as filed. Every row is on the WAT page.
| 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 | Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Knight Heather | WAT | Other A | September 30, 2026 | October 2, 2026 | 2d | 57 | — | — | Form 4 ↗ | ||
| Jiang Wei | WAT | Other A | September 30, 2026 | October 2, 2026 | 2d | 57 | — | — | Form 4 ↗ | ||
| KUEBLER CHRISTOPHER A | WAT | Option / conversion M | August 6, 2026 | August 7, 2026 | 1d | 3,626 | — | — | derivative | Form 4 ↗ | |
| KUEBLER CHRISTOPHER A | WAT | Sell S | August 6, 2026 | August 7, 2026 | 1d | 3,626 | $398 | $1.4M | Form 4 ↗ | ||
| KUEBLER CHRISTOPHER A | WAT | Option / conversion M | August 6, 2026 | August 7, 2026 | 1d | 3,626 | $136 | $495K | Form 4 ↗ | ||
| Knight Heather | WAT | Other A | June 30, 2026 | July 2, 2026 | 2d | 63 | — | — | Form 4 ↗ | ||
| Jiang Wei | WAT | Other A | June 30, 2026 | July 2, 2026 | 2d | 67 | — | — | Form 4 ↗ | ||
| Carpio Robert L III | WAT | Sell F | June 24, 2026 | June 25, 2026 | 1d | 189 | $369 | $70K | Form 4 ↗ | ||
| Chaubal Amol | WAT | Sell F | May 12, 2026 | May 14, 2026 | 2d | 239 | $352 | $84K | Form 4 ↗ | ||
| Bennett Jianqing | WAT | Sell F | April 6, 2026 | April 7, 2026 | 1d | 302 | $304 | $92K | Form 4 ↗ | ||
| Jiang Wei | WAT | Other A | March 31, 2026 | April 2, 2026 | 2d | 64 | — | — | Form 4 ↗ | ||
| Knight Heather | WAT | Other A | March 31, 2026 | April 2, 2026 | 2d | 68 | — | — | Form 4 ↗ | ||
| Jiang Wei | WAT | Buy P | March 16, 2026 | March 18, 2026 | 2d | 500 | $289 | $145K | Form 4 ↗ | ||
| FEARON RICHARD H | WAT | Buy P | March 6, 2026 | March 10, 2026 | 4d | 1,000 | $306 | $306K | Form 4 ↗ | ||
| Batra Udit | WAT | Sell F | March 2, 2026 | March 3, 2026 | 1d | 3,417 | $307 | $1.0M | Form 4 ↗ | ||
| Chaubal Amol | WAT | Sell F | March 2, 2026 | March 3, 2026 | 1d | 709 | $307 | $218K | Form 4 ↗ | ||
| Bennett Jianqing | WAT | Sell F | March 2, 2026 | March 3, 2026 | 1d | 410 | $307 | $126K | Form 4 ↗ | ||
| Carpio Robert L III | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 4,884 | — | — | derivative | Form 4 ↗ | |
| Carpio Robert L III | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 997 | — | — | Form 4 ↗ | ||
| Bennett Jianqing | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 4,826 | — | — | derivative | Form 4 ↗ | |
| Bennett Jianqing | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 986 | — | — | Form 4 ↗ | ||
| Chaubal Amol | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 7,125 | — | — | derivative | Form 4 ↗ | |
| Chaubal Amol | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 1,455 | — | — | Form 4 ↗ | ||
| Batra Udit | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 25,283 | — | — | derivative | Form 4 ↗ | |
| Batra Udit | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 5,165 | — | — | Form 4 ↗ | ||
| Vergnano Mark | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 57 | — | — | derivative | Form 4 ↗ | |
| Vergnano Mark | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 23 | — | — | Form 4 ↗ | ||
| KUEBLER CHRISTOPHER A | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 57 | — | — | derivative | Form 4 ↗ | |
| KUEBLER CHRISTOPHER A | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 23 | — | — | Form 4 ↗ | ||
| Knight Heather | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 57 | — | — | derivative | Form 4 ↗ | |
| Knight Heather | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 23 | — | — | Form 4 ↗ | ||
| Jiang Wei | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 57 | — | — | derivative | Form 4 ↗ | |
| Jiang Wei | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 23 | — | — | Form 4 ↗ | ||
| Huang Pearl S | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 57 | — | — | derivative | Form 4 ↗ | |
| Huang Pearl S | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 23 | — | — | Form 4 ↗ | ||
| Fraser Claire | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 877 | — | — | derivative | Form 4 ↗ | |
| Fraser Claire | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 358 | — | — | Form 4 ↗ | ||
| FEARON RICHARD H | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 57 | — | — | derivative | Form 4 ↗ | |
| FEARON RICHARD H | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 23 | — | — | Form 4 ↗ | ||
| Brennan Daniel J. | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 57 | — | — | derivative | Form 4 ↗ | |
| Brennan Daniel J. | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 23 | — | — | Form 4 ↗ | ||
| BADDOUR LINDA | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 57 | — | — | derivative | Form 4 ↗ | |
| BADDOUR LINDA | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 23 | — | — | Form 4 ↗ | ||
| Ornskov Flemming | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 57 | — | — | derivative | Form 4 ↗ | |
| Ornskov Flemming | WAT | Other A | February 25, 2026 | February 27, 2026 | 2d | 336 | — | — | Form 4 ↗ | ||
| Carpio Robert L III | WAT | Sell F | February 5, 2026 | February 6, 2026 | 1d | 38 | $377 | $14K | Form 4 ↗ | ||
| Bennett Jianqing | WAT | Sell F | February 5, 2026 | February 6, 2026 | 1d | 43 | $377 | $16K | Form 4 ↗ | ||
| Bennett Jianqing | WAT | Other A | February 4, 2026 | February 6, 2026 | 2d | 1,385 | — | — | Form 4 ↗ | ||
| Chaubal Amol | WAT | Sell F | February 5, 2026 | February 6, 2026 | 1d | 58 | $377 | $22K | Form 4 ↗ | ||
| Chaubal Amol | WAT | Other A | February 4, 2026 | February 6, 2026 | 2d | 1,884 | — | — | Form 4 ↗ | ||
| Batra Udit | WAT | Sell F | February 5, 2026 | February 6, 2026 | 1d | 218 | $377 | $82K | Form 4 ↗ | ||
| Batra Udit | WAT | Other A | February 4, 2026 | February 6, 2026 | 2d | 7,066 | — | — | Form 4 ↗ | ||
| Vergnano Mark | WAT | Other A | January 2, 2026 | January 5, 2026 | 3d | 828 | — | — | derivative | Form 4 ↗ | |
| Vergnano Mark | WAT | Other A | January 2, 2026 | January 5, 2026 | 3d | 307 | — | — | Form 4 ↗ | ||
| KUEBLER CHRISTOPHER A | WAT | Other A | January 2, 2026 | January 5, 2026 | 3d | 828 | — | — | derivative | Form 4 ↗ | |
| KUEBLER CHRISTOPHER A | WAT | Other A | January 2, 2026 | January 5, 2026 | 3d | 307 | — | — | Form 4 ↗ | ||
| Huang Pearl S | WAT | Other A | January 2, 2026 | January 5, 2026 | 3d | 828 | — | — | derivative | Form 4 ↗ | |
| Huang Pearl S | WAT | Other A | January 2, 2026 | January 5, 2026 | 3d | 307 | — | — | Form 4 ↗ | ||
| FEARON RICHARD H | WAT | Other A | January 2, 2026 | January 5, 2026 | 3d | 828 | — | — | derivative | Form 4 ↗ | |
| FEARON RICHARD H | WAT | Other A | January 2, 2026 | January 5, 2026 | 3d | 307 | — | — | Form 4 ↗ | ||
| Brennan Daniel J. | WAT | Other A | January 2, 2026 | January 5, 2026 | 3d | 828 | — | — | derivative | Form 4 ↗ | |
| Brennan Daniel J. | WAT | Other A | January 2, 2026 | January 5, 2026 | 3d | 307 | — | — | Form 4 ↗ | ||
| BADDOUR LINDA | WAT | Other A | January 2, 2026 | January 5, 2026 | 3d | 828 | — | — | derivative | Form 4 ↗ | |
| BADDOUR LINDA | WAT | Other A | January 2, 2026 | January 5, 2026 | 3d | 307 | — | — | Form 4 ↗ | ||
| Ornskov Flemming | WAT | Other A | January 2, 2026 | January 5, 2026 | 3d | 828 | — | — | derivative | Form 4 ↗ | |
| Ornskov Flemming | WAT | Other A | January 2, 2026 | January 5, 2026 | 3d | 307 | — | — | Form 4 ↗ | ||
| Jiang Wei | WAT | Other A | January 2, 2026 | January 5, 2026 | 3d | 828 | — | — | derivative | Form 4 ↗ | |
| Jiang Wei | WAT | Other A | January 2, 2026 | January 5, 2026 | 3d | 307 | — | — | Form 4 ↗ | ||
| Jiang Wei | WAT | Other A | December 31, 2025 | January 5, 2026 | 5d | 60 | — | — | late | Form 4 ↗ | |
| Knight Heather | WAT | Other A | January 2, 2026 | January 5, 2026 | 3d | 828 | — | — | derivative | Form 4 ↗ | |
| Knight Heather | WAT | Other A | January 2, 2026 | January 5, 2026 | 3d | 307 | — | — | Form 4 ↗ | ||
| Knight Heather | WAT | Other A | December 31, 2025 | January 5, 2026 | 5d | 60 | — | — | late | Form 4 ↗ | |
| KUEBLER CHRISTOPHER A | WAT | Option / conversion M | November 5, 2025 | November 7, 2025 | 2d | 3,761 | — | — | derivative | Form 4 ↗ | |
| KUEBLER CHRISTOPHER A | WAT | Sell F | November 5, 2025 | November 7, 2025 | 2d | 1,318 | $372 | $490K | Form 4 ↗ | ||
| KUEBLER CHRISTOPHER A | WAT | Option / conversion M | November 5, 2025 | November 7, 2025 | 2d | 3,761 | $130 | $490K | Form 4 ↗ | ||
| Knight Heather | WAT | Other A | September 30, 2025 | October 2, 2025 | 2d | 78 | — | — | Form 4 ↗ | ||
| Jiang Wei | WAT | Other A | September 30, 2025 | October 2, 2025 | 2d | 73 | — | — | Form 4 ↗ |
Federal contracts (USAspending, awards started in the last 180 days)
No contract award starting in the last 180 days was found for a recipient named exactly "WATERS CORP /DE/". Subsidiaries and differently-spelled recipients are not matched — search contracts.
Lobbying (Senate LDA, as client)
No LDA filing posted since October 2025 names "WATERS CORP /DE/" as the client. Filings under a subsidiary or trade-association name are not matched — search lobbying.
Related companies
Companies whose stock was traded by the same people who traded WAT, by number of filers in common. It shows overlap in public filings and nothing else.
- Apple Inc. AAPL 5 filers in common
- MICROSOFT CORP MSFT 5 filers in common
- ADOBE INC. ADBE 4 filers in common
- Accenture plc ACN 4 filers in common
- CHEVRON CORP CVX 4 filers in common
- Alphabet Inc. GOOGL 4 filers in common
- PROCTER & GAMBLE Co PG 4 filers in common
- HONEYWELL INTERNATIONAL INC HON 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.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
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.
Insiders and their transactions come from SEC EDGAR Form 4 filings for this issuer. Contracts and lobbying are matched by exact normalized name (suffixes like Inc./Corp. ignored) to USAspending recipients and LDA clients — a conservative match that misses subsidiaries on purpose. See methodology and corrections.
Not investment advice. Public records shown as filed; no recommendation is made or implied.