Director Pearl Huang receives new equity awards at Waters (NYSE: WAT)

Rhea-AI Filing Summary

Waters Corporation director Pearl S. Huang reported receiving new equity awards. On February 25, 2026, she was granted stock options for 57 shares of common stock at an exercise price of $0.00 per share. All of these option shares will vest and become exercisable on February 9, 2027.

On the same date, she also acquired 23 shares of common stock at $0.00 per share as a restricted stock award. The restrictions on 100% of these shares are scheduled to lapse on February 9, 2027. Following these awards, her directly held common stock position increased to 3,276.3 shares.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Huang Pearl S

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (Right to Buy)	57	$0.00	--
Grant/Award	Common Stock	23	$0.00	--

Holdings After Transaction: Stock Option (Right to Buy) — 57 shares (Direct); Common Stock — 3,276.3 shares (Direct)

Footnotes (1)

1. Represents shares of common stock subject to restrictions that lapse with respect to 100% of the shares on February 9, 2027. All of the shares of common stock underlying this stock option will vest and become exercisable on February 9, 2027.

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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^*

Huang Pearl S

(Last) (First) (Middle)

34 MAPLE STREET

(Street)

MILFORD MA 01757

(City) (State) (Zip)

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)

3. Date of Earliest Transaction (Month/Day/Year)
02/25/2026

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

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

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

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	02/25/2026		A		23(1)	A	$0	3,276.3	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
Stock Option (Right to Buy)	$319.44	02/25/2026		A		57(2)		02/09/2027	02/25/2036	Common Stock	57	$0	57	D

Explanation of Responses:

1. Represents shares of common stock subject to restrictions that lapse with respect to 100% of the shares on February 9, 2027.

2. All of the shares of common stock underlying this stock option will vest and become exercisable on February 9, 2027.

	/s/ Michael Lynn, attorney-in-fact for Pearl S. Huang	02/27/2026
	** 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.

FAQ

What did Waters (WAT) director Pearl S. Huang report in this Form 4?

Pearl S. Huang reported receiving equity awards from Waters. She was granted 57 stock options and 23 restricted common shares at $0.00 per share, both scheduled to vest or lapse on February 9, 2027, increasing her directly held common stock to 3,276.3 shares.

How many stock options did Pearl S. Huang receive from Waters (WAT)?

She received stock options covering 57 shares of Waters common stock. These options have a $0.00 exercise price and will fully vest and become exercisable on February 9, 2027, according to the Form 4 footnote describing the vesting schedule for the option grant.

What restricted stock award did Pearl S. Huang receive from Waters (WAT)?

She was granted 23 shares of Waters common stock as restricted stock. The restrictions on 100% of these shares are scheduled to lapse on February 9, 2027, meaning they become fully unrestricted on that date if award conditions are satisfied.

When do Pearl S. Huang’s Waters (WAT) equity awards vest or lapse?

Both awards reference February 9, 2027. All 57 option shares vest and become exercisable on February 9, 2027, while restrictions on all 23 restricted common shares lapse on the same date, aligning the vesting and restriction-lapse timelines.

What is Pearl S. Huang’s direct common stock ownership in Waters (WAT) after these awards?

After the February 25, 2026 transactions, her directly held Waters common stock totals 3,276.3 shares. This figure reflects her ownership following the grant of 23 restricted shares, as disclosed in the Form 4 transaction detail and holdings summary.

Did Pearl S. Huang buy or sell Waters (WAT) shares on the open market?

The Form 4 shows grant or award acquisitions, not open-market trades. Both transactions are coded as “A,” representing grants or other acquisitions at $0.00 per share, indicating compensation-related awards rather than purchases or sales in the market.