Waters director receives option and stock awards

Waters Corporation director Mark Vergnano reported equity awards rather than open-market trades.

Accepted by SEC EDGAR 02/27/2026 - 07:25 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Waters Corporation director Mark Vergnano reported equity awards rather than open-market trades. On February 25, 2026, he received a grant of stock options for 57 shares at an exercise price of $0.00 per share and an award of 23 shares of common stock, both as acquisitions.

The 23 common shares are restricted stock that remain subject to restrictions until February 9, 2027, when 100% of these restrictions lapse. All 57 shares underlying the stock option will vest and become exercisable on February 9, 2027. After these awards, he directly owns 4,540 shares of Waters common stock.

Insider Trade Summary

Grant/Award: 80 shares

Grant/Award 2 txns

Insider Vergnano Mark

Role Director

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

Holdings After Transaction: Stock Option (Right to Buy) — 57 contracts (Direct); Common Stock — 4,540 shares (Direct)

Holdings Before and After: Stock Option (Right to Buy), 0 to 57 contracts (Direct); Common Stock, 4,517 to 4,540 shares (Direct)

Footnotes (2)

1. F1. Represents shares of common stock subject to restrictions that lapse with respect to 100% of the shares on February 9, 2027.
2. F2. All of the shares of common stock underlying this stock option will vest and become exercisable on February 9, 2027.

FAQ

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

What did Waters (WAT) director Mark Vergnano report in this Form 4?

Mark Vergnano reported equity awards, not market trades. He received a grant of 57 stock options and 23 shares of restricted common stock on February 25, 2026, both classified as grant or award acquisitions rather than purchases or sales.

Were any Waters (WAT) shares bought or sold on the market in this filing?

No market purchases or sales occurred in this filing. Both reported transactions are coded as awards or other acquisitions, meaning the director received options and restricted shares from the company rather than trading Waters stock in the open market.

How many Waters (WAT) stock options were granted to Mark Vergnano?

He was granted stock options covering 57 shares of Waters common stock. These options were awarded at an exercise price of $0.00 per share and will fully vest and become exercisable on February 9, 2027, according to the disclosure footnote.

What restricted stock did Mark Vergnano receive from Waters (WAT)?

He received 23 shares of Waters common stock subject to restrictions. The restrictions on 100% of these shares lapse on February 9, 2027, at which point the shares will be fully vested and no longer subject to the stated restrictions.

What is Mark Vergnano’s Waters (WAT) share ownership after these awards?

After these transactions, Mark Vergnano directly owns 4,540 shares of Waters common stock. This total reflects the addition of the 23 restricted shares reported in the filing, as indicated by the post-transaction share balance in the non-derivative holding line.

When do the Waters (WAT) equity awards to Mark Vergnano vest?

Both awards vest on February 9, 2027. All 57 shares underlying the stock option become exercisable on that date, and the restrictions on 23 shares of restricted common stock lapse entirely then, making both grants fully vested simultaneously.

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^*

Vergnano Mark

(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	4,540	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 Mark Vergnano	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.