WAT
Waters Corporation
NYSE: WAT · HEALTHCARE · DIAGNOSTICS & RESEARCH
$476.88
+1.78% today
Updated 2026-10-28
Market cap
$42.90B
P/E ratio
110.62
P/S ratio
9.24x
EPS (TTM)
$3.95
Dividend yield
—
52W range
$283 – $455
Volume
0.8M
Waters Corporation (WAT) Insider transactions
Net insider activity
Net buying (107,964 shares)
Buy transactions
80
Sell transactions
20
All transactions
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-09-30 | KNIGHT, HEATHER | Director | Buy | 57 | — | — |
| 2026-09-30 | JIANG, WEI | Director | Buy | 57 | — | — |
| 2026-08-06 | KUEBLER, CHRISTOPHER A | Director | Sale | 3,626 | — | — |
| 2026-08-06 | KUEBLER, CHRISTOPHER A | Director | Sale | 3,626 | $397.94 | $1.44M |
| 2026-06-30 | KNIGHT, HEATHER | Director | Buy | 63 | — | — |
| 2026-06-30 | JIANG, WEI | Director | Buy | 67 | — | — |
| 2026-06-24 | CARPIO, ROBERT L III | SVP Waters Analytical Sciences | Sale | 189 | $369.18 | $69775.02 |
| 2026-05-12 | CHAUBAL, AMOL | SVP & Chief Financial Officer | Sale | 239 | $352.21 | $84178.19 |
| 2026-04-06 | BENNETT, JIANQING | SVP Waters Adv. Diagnostics | Sale | 302 | $304.09 | $91835.18 |
| 2026-03-31 | KNIGHT, HEATHER | Director | Buy | 68 | — | — |
| 2026-03-31 | JIANG, WEI | Director | Buy | 64 | — | — |
| 2026-03-16 | JIANG, WEI | Director | Buy | 500 | $289.46 | $144730.00 |
| 2026-03-06 | FEARON, RICHARD H | Director | Buy | 1,000 | $306.34 | $306340.00 |
| 2026-03-02 | CHAUBAL, AMOL | SVP & Chief Financial Officer | Sale | 709 | $307.23 | $217826.07 |
| 2026-03-02 | BENNETT, JIANQING | SVP Waters Adv. Diagnostics | Sale | 410 | $307.23 | $125964.30 |
| 2026-03-02 | BATRA, UDIT | Director, President and CEO | Sale | 3,417 | $307.23 | $1.05M |
| 2026-02-25 | VERGNANO, MARK | Director | Buy | 57 | — | — |
| 2026-02-25 | VERGNANO, MARK | Director | Buy | 23 | — | — |
| 2026-02-25 | ORNSKOV, FLEMMING | Director | Buy | 57 | — | — |
| 2026-02-25 | ORNSKOV, FLEMMING | Director | Buy | 336 | — | — |
| 2026-02-25 | KUEBLER, CHRISTOPHER A | Director | Buy | 57 | — | — |
| 2026-02-25 | KUEBLER, CHRISTOPHER A | Director | Buy | 23 | — | — |
| 2026-02-25 | KNIGHT, HEATHER | Director | Buy | 57 | — | — |
| 2026-02-25 | KNIGHT, HEATHER | Director | Buy | 23 | — | — |
| 2026-02-25 | JIANG, WEI | Director | Buy | 57 | — | — |
| 2026-02-25 | JIANG, WEI | Director | Buy | 23 | — | — |
| 2026-02-25 | HUANG, PEARL S | Director | Buy | 57 | — | — |
| 2026-02-25 | HUANG, PEARL S | Director | Buy | 23 | — | — |
| 2026-02-25 | FRASER, CLAIRE | Director | Buy | 877 | — | — |
| 2026-02-25 | FRASER, CLAIRE | Director | Buy | 358 | — | — |
| 2026-02-25 | FEARON, RICHARD H | Director | Buy | 57 | — | — |
| 2026-02-25 | FEARON, RICHARD H | Director | Buy | 23 | — | — |
| 2026-02-25 | CHAUBAL, AMOL | SVP & Chief Financial Officer | Buy | 7,125 | — | — |
| 2026-02-25 | CHAUBAL, AMOL | SVP & Chief Financial Officer | Buy | 1,455 | — | — |
| 2026-02-25 | CARPIO, ROBERT L III | SVP Waters Analytical Sciences | Buy | 4,884 | — | — |
| 2026-02-25 | CARPIO, ROBERT L III | SVP Waters Analytical Sciences | Buy | 997 | — | — |
| 2026-02-25 | BRENNAN, DANIEL J. | Director | Buy | 57 | — | — |
| 2026-02-25 | BRENNAN, DANIEL J. | Director | Buy | 23 | — | — |
| 2026-02-25 | BENNETT, JIANQING | SVP Waters Adv. Diagnostics | Buy | 4,826 | — | — |
| 2026-02-25 | BENNETT, JIANQING | SVP Waters Adv. Diagnostics | Buy | 986 | — | — |
| 2026-02-25 | BATRA, UDIT | Director, President and CEO | Buy | 25,283 | — | — |
| 2026-02-25 | BATRA, UDIT | Director, President and CEO | Buy | 5,165 | — | — |
| 2026-02-25 | BADDOUR, LINDA | Director | Buy | 57 | — | — |
| 2026-02-25 | BADDOUR, LINDA | Director | Buy | 23 | — | — |
| 2026-02-05 | CHAUBAL, AMOL | SVP & Chief Financial Officer | Sale | 58 | $376.89 | $21859.62 |
| 2026-02-05 | CARPIO, ROBERT L III | SVP, Waters Division | Sale | 38 | $376.89 | $14321.82 |
| 2026-02-05 | BENNETT, JIANQING | SVP TA Instruments Division | Sale | 43 | $376.89 | $16206.27 |
| 2026-02-05 | BATRA, UDIT | Director, President and CEO | Sale | 218 | $376.89 | $82162.02 |
| 2026-02-04 | CHAUBAL, AMOL | SVP & Chief Financial Officer | Buy | 1,884 | — | — |
| 2026-02-04 | BENNETT, JIANQING | SVP TA Instruments Division | Buy | 1,385 | — | — |
| 2026-02-04 | BATRA, UDIT | Director, President and CEO | Buy | 7,066 | — | — |
| 2026-01-02 | VERGNANO, MARK | Director | Buy | 828 | — | — |
| 2026-01-02 | VERGNANO, MARK | Director | Buy | 307 | — | — |
| 2026-01-02 | ORNSKOV, FLEMMING | Director | Buy | 828 | — | — |
| 2026-01-02 | ORNSKOV, FLEMMING | Director | Buy | 307 | — | — |
| 2026-01-02 | KUEBLER, CHRISTOPHER A | Director | Buy | 828 | — | — |
| 2026-01-02 | KUEBLER, CHRISTOPHER A | Director | Buy | 307 | — | — |
| 2026-01-02 | KNIGHT, HEATHER | Director | Buy | 828 | — | — |
| 2026-01-02 | KNIGHT, HEATHER | Director | Buy | 307 | — | — |
| 2026-01-02 | JIANG, WEI | Director | Buy | 828 | — | — |
| 2026-01-02 | JIANG, WEI | Director | Buy | 307 | — | — |
| 2026-01-02 | HUANG, PEARL S | Director | Buy | 828 | — | — |
| 2026-01-02 | HUANG, PEARL S | Director | Buy | 307 | — | — |
| 2026-01-02 | FEARON, RICHARD H | Director | Buy | 828 | — | — |
| 2026-01-02 | FEARON, RICHARD H | Director | Buy | 307 | — | — |
| 2026-01-02 | BRENNAN, DANIEL J. | Director | Buy | 828 | — | — |
| 2026-01-02 | BRENNAN, DANIEL J. | Director | Buy | 307 | — | — |
| 2026-01-02 | BADDOUR, LINDA | Director | Buy | 828 | — | — |
| 2026-01-02 | BADDOUR, LINDA | Director | Buy | 307 | — | — |
| 2025-12-31 | KNIGHT, HEATHER | Director | Buy | 60 | — | — |
| 2025-12-31 | JIANG, WEI | Director | Buy | 60 | — | — |
| 2025-11-05 | KUEBLER, CHRISTOPHER A | Director | Sale | 3,761 | — | — |
| 2025-11-05 | KUEBLER, CHRISTOPHER A | Director | Buy | 3,761 | $130.35 | $490246.35 |
| 2025-11-05 | KUEBLER, CHRISTOPHER A | Director | Sale | 1,318 | $371.97 | $490256.46 |
| 2025-09-30 | KNIGHT, HEATHER | Director | Buy | 78 | — | — |
| 2025-09-30 | JIANG, WEI | Director | Buy | 73 | — | — |
| 2025-06-30 | KNIGHT, HEATHER | Director | Buy | 68 | — | — |
| 2025-06-30 | JIANG, WEI | Director | Buy | 68 | — | — |
| 2025-06-24 | CARPIO, ROBERT L III | SVP, Waters Division | Sale | 134 | $346.80 | $46471.20 |
| 2025-05-12 | CHAUBAL, AMOL | SVP & Chief Financial Officer | Sale | 239 | $366.67 | $87634.13 |
| 2025-04-07 | BENNETT, JIANQING | SVP TA Instruments Division | Sale | 303 | $325.80 | $98717.40 |
| 2025-03-31 | KNIGHT, HEATHER | Director | Buy | 53 | — | — |
| 2025-03-31 | JIANG, WEI | Director | Buy | 53 | — | — |
| 2025-03-01 | CHAUBAL, AMOL | SVP & Chief Financial Officer | Sale | 1,076 | $371.79 | $400046.04 |
| 2025-03-01 | BENNETT, JIANQING | SVP TA Instruments Division | Sale | 786 | $371.79 | $292226.94 |
| 2025-03-01 | BATRA, UDIT | Director, President and CEO | Sale | 4,976 | $371.79 | $1.85M |
| 2025-02-05 | CHAUBAL, AMOL | SVP & Chief Financial Officer | Buy | 4,287 | — | — |
| 2025-02-05 | CHAUBAL, AMOL | SVP & Chief Financial Officer | Buy | 3,317 | — | — |
| 2025-02-05 | CHAUBAL, AMOL | SVP & Chief Financial Officer | Buy | 833 | — | — |
| 2025-02-05 | CARPIO, ROBERT L III | SVP, Waters Division | Buy | 2,796 | — | — |
| 2025-02-05 | CARPIO, ROBERT L III | SVP, Waters Division | Buy | 543 | — | — |
| 2025-02-05 | BENNETT, JIANQING | SVP TA Instruments Division | Buy | 3,168 | — | — |
| 2025-02-05 | BENNETT, JIANQING | SVP TA Instruments Division | Buy | 2,618 | — | — |
| 2025-02-05 | BENNETT, JIANQING | SVP TA Instruments Division | Buy | 615 | — | — |
| 2025-02-05 | BATRA, UDIT | Director, President and CEO | Buy | 18,640 | — | — |
| 2025-02-05 | BATRA, UDIT | Director, President and CEO | Buy | 11,349 | — | — |
| 2025-02-05 | BATRA, UDIT | Director, President and CEO | Buy | 3,622 | — | — |
| 2025-01-02 | VERGNANO, MARK P | Director | Buy | 818 | — | — |
| 2025-01-02 | VERGNANO, MARK P | Director | Buy | 319 | — | — |
| 2025-01-02 | ORNSKOV, FLEMMING | Director | Buy | 818 | — | — |
Frequently asked questions
Are WAT insiders buying or selling?
Over the transactions on record, WAT insiders have been net buyers, with about $6.48M in stock sold across 20 sales, against 3 open-market purchases.
Does insider selling at WAT mean the stock will fall?
Not by itself. Most executive selling is pre-scheduled through 10b5-1 plans filed months in advance, and insiders sell for diversification, taxes, and liquidity far more often than out of any view on the price. Insider buying is the stronger signal, especially when several insiders buy around the same time, because there is usually only one reason to put personal cash into the stock.
Which WAT insiders are selling the most?
Recent selling is concentrated in a few names. BATRA, UDIT accounts for the largest share on record, with about $2.98M sold. Selling by one or two individuals matters less than broad selling across the whole leadership team, which is the pattern worth watching.