WAT

insider transactions

WATERS CORP /DE/ — buys & sells by directors, officers and 10% owners (SEC Form 4).

30D 90D 1Y

Cluster buy signal: 2 different insiders made open-market purchases in the last 365 days, totalling $451.1K.

Net shares · 365d

+1.5K

1.5K buy · 0 sell

Net value · 365d

$451.1K

$451.1K in · $0 out

Sentiment · 365d

Net buying

100% buying · 0% selling

Open-market trades · 365d

1.5K buy · 0 sell

Net buy / sell volume

Tap or hover the chart for daily net volume. Green = net buying, red = net selling.

All transactions

Other·F
May 12, 26

Chaubal Amol KEY

SVP & Chief Financial Officer

$84.2K

239 sh · $352.21

Own -3%
Other·F
Apr 6, 26

Bennett Jianqing

SVP Waters Adv. Diagnostics

$91.8K

302 sh · $304.09

Own -4%
Grant·A
Mar 31, 26

Knight Heather

Director

$0

68 sh

Own +6%
Grant·A
Mar 31, 26

Jiang Wei

Director

$0

64 sh

Own +2%
Buy·P
Mar 16, 26

Jiang Wei

Director

$144.7K

500 sh · $289.46

Own +17%
Buy·P
Mar 6, 26

FEARON RICHARD H

Director

$306.3K

1.0K sh · $306.34

Own +43%
Other·F
Mar 2, 26

Batra Udit KEY

President and CEO

$1.0M

3.4K sh · $307.23

Own -9%
Other·F
Mar 2, 26

Chaubal Amol KEY

SVP & Chief Financial Officer

$217.8K

709 sh · $307.23

Own -8%
Other·F
Mar 2, 26

Bennett Jianqing

SVP Waters Adv. Diagnostics

$126.0K

410 sh · $307.23

Own -6%
Grant·A
Feb 25, 26

Huang Pearl S

Director

$0

57 sh

Own New
Grant·A
Feb 25, 26

Huang Pearl S

Director

$0

23 sh

Own +1%
Grant·A
Feb 25, 26

Batra Udit KEY

President and CEO

$0

25.3K sh

Own New
Grant·A
Feb 25, 26

Batra Udit KEY

President and CEO

$0

5.2K sh

Own +16%
Grant·A
Feb 25, 26

Chaubal Amol KEY

SVP & Chief Financial Officer

$0

7.1K sh

Own New
Grant·A
Feb 25, 26

Chaubal Amol KEY

SVP & Chief Financial Officer

$0

1.5K sh

Own +21%
Grant·A
Feb 25, 26

Bennett Jianqing

SVP Waters Adv. Diagnostics

$0

4.8K sh

Own New
Grant·A
Feb 25, 26

Bennett Jianqing

SVP Waters Adv. Diagnostics

$0

986 sh

Own +16%
Grant·A
Feb 25, 26

Ornskov Flemming

Director

$0

57 sh

Own New
Grant·A
Feb 25, 26

Ornskov Flemming

Director

$0

336 sh

Own +7%
Grant·A
Feb 25, 26

VERGNANO MARK P

Director

$0

57 sh

Own New
Grant·A
Feb 25, 26

VERGNANO MARK P

Director

$0

23 sh

Own +1%
Grant·A
Feb 25, 26

KUEBLER CHRISTOPHER A

Director

$0

57 sh

Own New
Grant·A
Feb 25, 26

KUEBLER CHRISTOPHER A

Director

$0

23 sh

Own +0%
Grant·A
Feb 25, 26

BADDOUR LINDA

Director

$0

57 sh

Own New
Grant·A
Feb 25, 26

BADDOUR LINDA

Director

$0

23 sh

Own +1%
Grant·A
Feb 25, 26

Brennan Daniel J.

Director

$0

57 sh

Own New
Grant·A
Feb 25, 26

Brennan Daniel J.

Director

$0

23 sh

Own +2%
Grant·A
Feb 25, 26

Carpio Robert L III

SVP Waters Analytical Sciences

$0

4.9K sh

Own New
Grant·A
Feb 25, 26

Carpio Robert L III

SVP Waters Analytical Sciences

$0

997 sh

Own +38%
Grant·A
Feb 25, 26

Fraser Claire

Director

$0

877 sh

Own New
Grant·A
Feb 25, 26

Fraser Claire

Director

$0

358 sh

Own +273%
Grant·A
Feb 25, 26

FEARON RICHARD H

Director

$0

57 sh

Own New
Grant·A
Feb 25, 26

FEARON RICHARD H

Director

$0

23 sh

Own +1%
Grant·A
Feb 25, 26

Knight Heather

Director

$0

57 sh

Own New
Grant·A
Feb 25, 26

Knight Heather

Director

$0

23 sh

Own +2%
Grant·A
Feb 25, 26

Jiang Wei

Director

$0

57 sh

Own New
Grant·A
Feb 25, 26

Jiang Wei

Director

$0

23 sh

Own +1%
Other·F
Feb 5, 26

Bennett Jianqing

SVP TA Instruments Division

$16.2K

43 sh · $376.89

Own -1%
Other·F
Feb 5, 26

Batra Udit KEY

President and CEO

$82.2K

218 sh · $376.89

Own -1%
Other·F
Feb 5, 26

Carpio Robert L III

SVP, Waters Division

$14.3K

38 sh · $376.89

Own -1%
Other·F
Feb 5, 26

Chaubal Amol KEY

SVP & Chief Financial Officer

$21.9K

58 sh · $376.89

Own -1%
Grant·A
Feb 4, 26

Bennett Jianqing

SVP TA Instruments Division

$0

1.4K sh

Own +28%
Grant·A
Feb 4, 26

Batra Udit KEY

President and CEO

$0

7.1K sh

Own +29%
Grant·A
Feb 4, 26

Chaubal Amol KEY

SVP & Chief Financial Officer

$0

1.9K sh

Own +36%
Grant·A
Jan 2, 26

VERGNANO MARK P

Director

$0

828 sh

Own New
Grant·A
Jan 2, 26

VERGNANO MARK P

Director

$0

307 sh

Own +7%
Grant·A
Jan 2, 26

Huang Pearl S

Director

$0

828 sh

Own New
Grant·A
Jan 2, 26

Huang Pearl S

Director

$0

307 sh

Own +10%
Grant·A
Jan 2, 26

Brennan Daniel J.

Director

$0

828 sh

Own New
Grant·A
Jan 2, 26

Brennan Daniel J.

Director

$0

307 sh

Own +30%
Grant·A
Jan 2, 26

FEARON RICHARD H

Director

$0

828 sh

Own New
Grant·A
Jan 2, 26

FEARON RICHARD H

Director

$0

307 sh

Own +16%
Grant·A
Jan 2, 26

Ornskov Flemming

Director

$0

828 sh

Own New
Grant·A
Jan 2, 26

Ornskov Flemming

Director

$0

307 sh

Own +7%
Grant·A
Jan 2, 26

BADDOUR LINDA

Director

$0

828 sh

Own New
Grant·A
Jan 2, 26

BADDOUR LINDA

Director

$0

307 sh

Own +12%
Grant·A
Jan 2, 26

Jiang Wei

Director

$0

828 sh

Own New
Grant·A
Jan 2, 26

Jiang Wei

Director

$0

307 sh

Own +12%
Grant·A
Jan 2, 26

KUEBLER CHRISTOPHER A

Director

$0

828 sh

Own New
Grant·A
Jan 2, 26

KUEBLER CHRISTOPHER A

Director

$0

307 sh

Own +2%
Grant·A
Jan 2, 26

Knight Heather

Director

$0

828 sh

Own New
Grant·A
Jan 2, 26

Knight Heather

Director

$0

307 sh

Own +37%
Grant·A
Dec 31, 25

Jiang Wei

Director

$0

60 sh

Own +2%
Grant·A
Dec 31, 25

Knight Heather

Director

$0

60 sh

Own +8%
Exercise·M
Nov 5, 25

KUEBLER CHRISTOPHER A

Director

$0

3.8K sh

Own New
Exercise·M
Nov 5, 25

KUEBLER CHRISTOPHER A

Director

$490.2K

3.8K sh · $130.35

Own +25%
Other·F
Nov 5, 25

KUEBLER CHRISTOPHER A

Director

$490.3K

1.3K sh · $371.97

Own -7%
Grant·A
Sep 30, 25

Jiang Wei

Director

$0

73 sh

Own +3%
Grant·A
Sep 30, 25

Knight Heather

Director

$0

78 sh

Own +11%
Grant·A
Jun 30, 25

Jiang Wei

Director

$0

68 sh

Own +3%
Grant·A
Jun 30, 25

Knight Heather

Director

$0

68 sh

Own +11%
Other·F
Jun 24, 25

Carpio Robert L III

SVP, Waters Division

$46.5K

134 sh · $346.80

Own -5%

Date▾	Insider	Role	Type	Shares	Own Δ	Price	Value
May 12, 2026	Chaubal Amol KEY	SVP & Chief Financial Officer	Other F	239	-3%	$352.21	$84.2K
Apr 6, 2026	Bennett Jianqing	SVP Waters Adv. Diagnostics	Other F	302	-4%	$304.09	$91.8K
Mar 31, 2026	Knight Heather	Director	Grant A	68	+6%	—	$0
Mar 31, 2026	Jiang Wei	Director	Grant A	64	+2%	—	$0
Mar 16, 2026	Jiang Wei	Director	Buy P	500	+17%	$289.46	$144.7K
Mar 6, 2026	FEARON RICHARD H	Director	Buy P	1.0K	+43%	$306.34	$306.3K
Mar 2, 2026	Batra Udit KEY	President and CEO	Other F	3.4K	-9%	$307.23	$1.0M
Mar 2, 2026	Chaubal Amol KEY	SVP & Chief Financial Officer	Other F	709	-8%	$307.23	$217.8K
Mar 2, 2026	Bennett Jianqing	SVP Waters Adv. Diagnostics	Other F	410	-6%	$307.23	$126.0K
Feb 25, 2026	Huang Pearl S	Director	Grant A	57	New	—	$0
Feb 25, 2026	Huang Pearl S	Director	Grant A	23	+1%	—	$0
Feb 25, 2026	Batra Udit KEY	President and CEO	Grant A	25.3K	New	—	$0
Feb 25, 2026	Batra Udit KEY	President and CEO	Grant A	5.2K	+16%	—	$0
Feb 25, 2026	Chaubal Amol KEY	SVP & Chief Financial Officer	Grant A	7.1K	New	—	$0
Feb 25, 2026	Chaubal Amol KEY	SVP & Chief Financial Officer	Grant A	1.5K	+21%	—	$0
Feb 25, 2026	Bennett Jianqing	SVP Waters Adv. Diagnostics	Grant A	4.8K	New	—	$0
Feb 25, 2026	Bennett Jianqing	SVP Waters Adv. Diagnostics	Grant A	986	+16%	—	$0
Feb 25, 2026	Ornskov Flemming	Director	Grant A	57	New	—	$0
Feb 25, 2026	Ornskov Flemming	Director	Grant A	336	+7%	—	$0
Feb 25, 2026	VERGNANO MARK P	Director	Grant A	57	New	—	$0
Feb 25, 2026	VERGNANO MARK P	Director	Grant A	23	+1%	—	$0
Feb 25, 2026	KUEBLER CHRISTOPHER A	Director	Grant A	57	New	—	$0
Feb 25, 2026	KUEBLER CHRISTOPHER A	Director	Grant A	23	+0%	—	$0
Feb 25, 2026	BADDOUR LINDA	Director	Grant A	57	New	—	$0
Feb 25, 2026	BADDOUR LINDA	Director	Grant A	23	+1%	—	$0
Feb 25, 2026	Brennan Daniel J.	Director	Grant A	57	New	—	$0
Feb 25, 2026	Brennan Daniel J.	Director	Grant A	23	+2%	—	$0
Feb 25, 2026	Carpio Robert L III	SVP Waters Analytical Sciences	Grant A	4.9K	New	—	$0
Feb 25, 2026	Carpio Robert L III	SVP Waters Analytical Sciences	Grant A	997	+38%	—	$0
Feb 25, 2026	Fraser Claire	Director	Grant A	877	New	—	$0
Feb 25, 2026	Fraser Claire	Director	Grant A	358	+273%	—	$0
Feb 25, 2026	FEARON RICHARD H	Director	Grant A	57	New	—	$0
Feb 25, 2026	FEARON RICHARD H	Director	Grant A	23	+1%	—	$0
Feb 25, 2026	Knight Heather	Director	Grant A	57	New	—	$0
Feb 25, 2026	Knight Heather	Director	Grant A	23	+2%	—	$0
Feb 25, 2026	Jiang Wei	Director	Grant A	57	New	—	$0
Feb 25, 2026	Jiang Wei	Director	Grant A	23	+1%	—	$0
Feb 5, 2026	Bennett Jianqing	SVP TA Instruments Division	Other F	43	-1%	$376.89	$16.2K
Feb 5, 2026	Batra Udit KEY	President and CEO	Other F	218	-1%	$376.89	$82.2K
Feb 5, 2026	Carpio Robert L III	SVP, Waters Division	Other F	38	-1%	$376.89	$14.3K
Feb 5, 2026	Chaubal Amol KEY	SVP & Chief Financial Officer	Other F	58	-1%	$376.89	$21.9K
Feb 4, 2026	Bennett Jianqing	SVP TA Instruments Division	Grant A	1.4K	+28%	—	$0
Feb 4, 2026	Batra Udit KEY	President and CEO	Grant A	7.1K	+29%	—	$0
Feb 4, 2026	Chaubal Amol KEY	SVP & Chief Financial Officer	Grant A	1.9K	+36%	—	$0
Jan 2, 2026	VERGNANO MARK P	Director	Grant A	828	New	—	$0
Jan 2, 2026	VERGNANO MARK P	Director	Grant A	307	+7%	—	$0
Jan 2, 2026	Huang Pearl S	Director	Grant A	828	New	—	$0
Jan 2, 2026	Huang Pearl S	Director	Grant A	307	+10%	—	$0
Jan 2, 2026	Brennan Daniel J.	Director	Grant A	828	New	—	$0
Jan 2, 2026	Brennan Daniel J.	Director	Grant A	307	+30%	—	$0
Jan 2, 2026	FEARON RICHARD H	Director	Grant A	828	New	—	$0
Jan 2, 2026	FEARON RICHARD H	Director	Grant A	307	+16%	—	$0
Jan 2, 2026	Ornskov Flemming	Director	Grant A	828	New	—	$0
Jan 2, 2026	Ornskov Flemming	Director	Grant A	307	+7%	—	$0
Jan 2, 2026	BADDOUR LINDA	Director	Grant A	828	New	—	$0
Jan 2, 2026	BADDOUR LINDA	Director	Grant A	307	+12%	—	$0
Jan 2, 2026	Jiang Wei	Director	Grant A	828	New	—	$0
Jan 2, 2026	Jiang Wei	Director	Grant A	307	+12%	—	$0
Jan 2, 2026	KUEBLER CHRISTOPHER A	Director	Grant A	828	New	—	$0
Jan 2, 2026	KUEBLER CHRISTOPHER A	Director	Grant A	307	+2%	—	$0
Jan 2, 2026	Knight Heather	Director	Grant A	828	New	—	$0
Jan 2, 2026	Knight Heather	Director	Grant A	307	+37%	—	$0
Dec 31, 2025	Jiang Wei	Director	Grant A	60	+2%	—	$0
Dec 31, 2025	Knight Heather	Director	Grant A	60	+8%	—	$0
Nov 5, 2025	KUEBLER CHRISTOPHER A	Director	Exercise M	3.8K	New	—	$0
Nov 5, 2025	KUEBLER CHRISTOPHER A	Director	Exercise M	3.8K	+25%	$130.35	$490.2K
Nov 5, 2025	KUEBLER CHRISTOPHER A	Director	Other F	1.3K	-7%	$371.97	$490.3K
Sep 30, 2025	Jiang Wei	Director	Grant A	73	+3%	—	$0
Sep 30, 2025	Knight Heather	Director	Grant A	78	+11%	—	$0
Jun 30, 2025	Jiang Wei	Director	Grant A	68	+3%	—	$0
Jun 30, 2025	Knight Heather	Director	Grant A	68	+11%	—	$0
Jun 24, 2025	Carpio Robert L III	SVP, Waters Division	Other F	134	-5%	$346.80	$46.5K

About WAT insider trading

This page tracks insider transactions for WATERS CORP /DE/ (WAT) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.