Waters SVP Carpio receives options and RSUs

Carpio Robert L III reported acquisition or exercise transactions in this Form 4 filing.

Accepted by SEC EDGAR 02/27/2026 - 07:33 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Carpio Robert L III reported acquisition or exercise transactions in this Form 4 filing.

Waters Corp senior vice president Robert L. Carpio III received new equity awards, not open-market purchases or sales. He was granted 4,884 stock options and 997 restricted stock units as of February 25, 2026. The options and RSUs both vest in four equal annual installments starting on February 25, 2027, contingent on his continued service. Following the RSU grant, his directly held common stock position is 3,615 shares.

Insider Trade Summary

Grant/Award: 5,881 shares

Grant/Award 2 txns

Insider Carpio Robert L III

Role SVP Waters Analytical Sciences

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (Right to Buy)	4,884	$0.00	$0.00
Grant/Award	Common Stock	997	$0.00	$0.00

Holdings After Transaction: Stock Option (Right to Buy) — 4,884 contracts (Direct); Common Stock — 3,615 shares (Direct)

Holdings Before and After: Stock Option (Right to Buy), 0 to 4,884 contracts (Direct); Common Stock, 2,618 to 3,615 shares (Direct)

Footnotes (2)

1. F1. Represents restricted stock units ("RSUs"), which will vest in four equal annual installments, with the first such installment vesting on February 25, 2027, subject to the Reporting Person's continued service with the Issuer on each such vesting date. The RSUs are convertible into shares of the Issuer's common stock on a one-to-one basis upon vesting and settlement.
2. F2. The shares of common stock underlying this stock option will vest and become exercisable in four equal annual installments, with the first such installment vesting and becoming exercisable on February 25, 2027, subject to the Reporting Person's continued service with the Issuer on each such vesting date.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Waters (WAT) executive Robert L. Carpio III report on this Form 4?

Robert L. Carpio III reported equity awards from Waters Corp, not market trades. He received 4,884 stock options and 997 restricted stock units as of February 25, 2026, as part of his compensation, increasing his directly held common stock to 3,615 shares after the grant.

How many stock options did Robert L. Carpio III receive from Waters (WAT)?

He received 4,884 stock options with a reported grant price of $0.00 per share. These options vest in four equal annual installments beginning on February 25, 2027, and each installment becomes exercisable on its vesting date, subject to his continued service with Waters Corp.

What are the vesting terms of Robert L. Carpio III’s Waters (WAT) RSUs?

The 997 restricted stock units vest in four equal annual installments starting February 25, 2027. Vesting requires Carpio’s continued service with Waters on each vesting date. Upon vesting and settlement, each RSU converts into one share of Waters Corp common stock, on a one-to-one basis.

How many Waters (WAT) common shares does Robert L. Carpio III own after this filing?

After the reported RSU equity award, Carpio directly holds 3,615 shares of Waters Corp common stock. This figure reflects his ownership immediately following the grant of 997 restricted stock units reported as common stock, as disclosed in the Form 4 transaction table.

Are Robert L. Carpio III’s Waters (WAT) option and RSU awards immediately exercisable or vested?

No, both awards vest over time and are not fully available immediately. The 4,884 stock options and 997 RSUs vest in four equal annual installments, with the first vesting on February 25, 2027, provided Carpio continues to serve Waters on each vesting date.

Did Robert L. Carpio III buy or sell Waters (WAT) shares on the open market in this Form 4?

He did not report any open-market buys or sells. The Form 4 only shows equity compensation awards: 4,884 stock options and 997 restricted stock units granted at a price of $0.00 per share as part of his role as an executive at Waters Corp.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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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^*

Carpio Robert L III

(Last) (First) (Middle)

C/O WATERS CORPORATION

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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP Waters Analytical Sciences

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		997(1)	A	$0	3,615	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		4,884		(2)	02/25/2036	Common Stock	4,884	$0	4,884	D

Explanation of Responses:

1. Represents restricted stock units ("RSUs"), which will vest in four equal annual installments, with the first such installment vesting on February 25, 2027, subject to the Reporting Person's continued service with the Issuer on each such vesting date. The RSUs are convertible into shares of the Issuer's common stock on a one-to-one basis upon vesting and settlement.

2. The shares of common stock underlying this stock option will vest and become exercisable in four equal annual installments, with the first such installment vesting and becoming exercisable on February 25, 2027, subject to the Reporting Person's continued service with the Issuer on each such vesting date.

	/s/ Michael Lynn, attorney-in-fact for Robert L. Carpio III	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.
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