Waters Corporation (WAT) has 20 known insider and institutional holders on record. The largest holder is BERTHIAUME DOUGLAS A with 2,144,365 shares. Other notable holders include Batra Udit and OConnell Christopher J.
Over the last 12 months, insiders have made 48 transactions in WAT stock — 36 buys (valued at $15.36M) and 0 sells (valued at RSU Award). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
WAT Insider Ownership
Top Holder
BERTHIAUME DOUGLAS A
2,144,365 shares
Buys (12 mo)
36
$15.36M value
Sells (12 mo)
0
$0.00 value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Berthiaume Douglas A |
Director |
2,144,365 |
2017-11-06 |
|
| 2 |
Batra Udit |
President and CEO |
33,140 |
2026-03-03 |
|
| 3 |
Oconnell Christopher J |
CEO and President |
27,595 |
2020-08-03 |
|
| 4 |
Berendt Michael J |
Director |
16,449 |
2021-08-16 |
|
| 5 |
Hendrickson Gary E |
Director |
8,245 |
2022-05-09 |
|
| 6 |
Chaubal Amol |
SVP & Chief Financial Officer |
7,796 |
2026-03-03 |
|
| 7 |
Bennett Jianqing |
SVP Waters Adv. Diagnostics |
6,532 |
2026-04-07 |
|
| 8 |
Rae Elizabeth B |
SVP, Global HR |
6,380 |
2020-08-21 |
|
| 9 |
Cassis Eugene G |
SVP |
5,905 |
2018-02-16 |
|
| 10 |
King Ian |
SVP, Global Products |
5,529 |
2021-03-03 |
|
| 11 |
Hyde Belinda |
SVP, Global Human Resources |
4,675 |
2022-02-22 |
|
| 12 |
Pratt Jonathan M |
SVP Waters Division |
3,887 |
2023-10-11 |
|
| 13 |
Buck Sherry |
SVP and CFO |
3,720 |
2020-11-02 |
|
| 14 |
Carpio Robert L Iii |
SVP Waters Analytical Sciences |
3,615 |
2026-02-27 |
|
| 15 |
Jiang Wei |
Director |
3,505 |
2026-04-02 |
|
| 16 |
Fearon Richard H |
Director |
3,302 |
2026-03-10 |
|
| 17 |
Silveira Michael F |
VP, Corporate Controller |
3,288 |
2022-05-04 |
|
| 18 |
Terricciano David |
SVP, Global Operations |
3,000 |
2018-03-01 |
|
| 19 |
Welch Daniel J. |
SVP Global Operations |
2,847 |
2022-02-25 |
|
| 20 |
Harrington Michael C |
SVP, Global Markets |
2,660 |
2021-03-03 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-04-06 |
Bennett Jianqing |
SVP Waters Adv. Diagnostics |
Tax Withholding of RSU |
302 |
$304.09 |
$91.84K |
| 2026-03-31 |
Knight Heather |
Director |
RSU Award |
68 |
- |
- |
| 2026-03-31 |
Jiang Wei |
Director |
RSU Award |
64 |
- |
- |
| 2026-03-16 |
Jiang Wei |
Director |
Informative Buy |
500 |
$289.46 |
$144.73K |
| 2026-03-06 |
Fearon Richard H |
Director |
Informative Buy |
1,000 |
$306.34 |
$306.34K |
| 2026-03-02 |
Bennett Jianqing |
SVP Waters Adv. Diagnostics |
Tax Withholding of RSU |
410 |
$307.23 |
$125.96K |
| 2026-03-02 |
Batra Udit |
President and CEO |
Tax Withholding of RSU |
3,417 |
$307.23 |
$1.05M |
| 2026-03-02 |
Chaubal Amol |
SVP & Chief Financial Officer |
Tax Withholding of RSU |
709 |
$307.23 |
$217.83K |
| 2026-02-25 |
Carpio Robert L Iii |
SVP Waters Analytical Sciences |
RSU Award |
997 |
- |
- |
| 2026-02-25 |
Knight Heather |
Director |
RSU Award |
57 |
$319.44 |
$18.21K |
| 2026-02-25 |
Jiang Wei |
Director |
RSU Award |
57 |
$319.44 |
$18.21K |
| 2026-02-25 |
Bennett Jianqing |
SVP Waters Adv. Diagnostics |
RSU Award |
4,826 |
$319.44 |
$1.54M |
| 2026-02-25 |
Huang Pearl S |
Director |
RSU Award |
57 |
$319.44 |
$18.21K |
| 2026-02-25 |
Batra Udit |
President and CEO |
RSU Award |
25,283 |
$319.44 |
$8.08M |
| 2026-02-25 |
Chaubal Amol |
SVP & Chief Financial Officer |
RSU Award |
7,125 |
$319.44 |
$2.28M |
| 2026-02-25 |
Ornskov Flemming |
Director |
RSU Award |
57 |
$319.44 |
$18.21K |
| 2026-02-25 |
Brennan Daniel J. |
Director |
RSU Award |
57 |
$319.44 |
$18.21K |
| 2026-02-25 |
Vergnano Mark |
Director |
RSU Award |
57 |
$319.44 |
$18.21K |
| 2026-02-25 |
Fraser Claire |
Director |
RSU Award |
358 |
- |
- |
| 2026-02-25 |
Kuebler Christopher A |
Director |
RSU Award |
57 |
$319.44 |
$18.21K |
| 2026-02-25 |
Fearon Richard H |
Director |
RSU Award |
57 |
$319.44 |
$18.21K |
| 2026-02-25 |
Baddour Linda |
Director |
RSU Award |
57 |
$319.44 |
$18.21K |
| 2026-02-09 |
Fraser Claire |
Director |
Unknown |
- |
- |
- |
| 2026-02-05 |
Carpio Robert L Iii |
SVP, Waters Division |
Tax Withholding of RSU |
38 |
$376.89 |
$14.32K |
| 2026-02-05 |
Bennett Jianqing |
SVP Ta Instruments Division |
Tax Withholding of RSU |
43 |
$376.89 |
$16.21K |
