Director at Waters (NYSE: WAT) makes open-market share purchase

Rhea-AI Filing Summary

Waters Corp director Wei Jiang bought 500 shares of common stock in an open-market transaction at $289.46 per share. After this purchase, Jiang directly owns 3,441.27 Waters shares, increasing their personal stake in the company.

Insider Trade Summary

Net Buyer: 500 shares ($144,730)

Net Buy 1 txn

Insider Jiang Wei

Role Director

Bought 500 shs ($145K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	500	$289.46	$145K

Holdings After Transaction: Common Stock — 3,441.27 shares (Direct)

Footnotes (1)

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Jiang Wei

(Last) (First) (Middle)

34 MAPLE STREET

(Street)

MILFORD MASSACHUSETTS 01757

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
WATERS CORP /DE/ [ WAT ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/16/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/16/2026		P		500	A	$289.46	3,441.27	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Michael Lynn, attorney-in-fact for Wei Jiang	03/18/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Wei Jiang report at WAT?

Wei Jiang reported an open-market purchase of 500 Waters common shares. The shares were bought at a price of $289.46 per share, increasing Jiang’s direct ownership stake in the company to 3,441.27 shares.

How many Waters (WAT) shares does Wei Jiang now own?

After the reported transaction, Wei Jiang directly owns 3,441.27 Waters shares. This reflects the addition of 500 shares acquired in an open-market purchase at $289.46 per share, as disclosed in the Form 4 filing.

Was the Wei Jiang Waters (WAT) trade a purchase or sale?

The transaction was a purchase of Waters common stock. Wei Jiang acquired 500 shares in an open-market transaction at $289.46 per share, as indicated by the Form 4 transaction code “P” for purchase.

What price did Wei Jiang pay for Waters (WAT) shares?

Wei Jiang paid $289.46 per share for 500 Waters common shares. This open-market purchase increased Jiang’s direct holdings to 3,441.27 shares, according to the reported Form 4 insider transaction details.

Is Wei Jiang’s ownership in Waters (WAT) direct or indirect?

Wei Jiang’s reported ownership is direct, as indicated by the direct ownership code. Following the 500-share open-market purchase, Jiang directly holds 3,441.27 Waters common shares, with no indirect holding entity noted in the filing.