BlackRock (NYSE: WAT) holds 7.64M shares of Waters, a 7.8% stake

Rhea-AI Filing Summary

BlackRock, Inc. filed an Amendment No. 18 to a Schedule 13G/A reporting beneficial ownership of 7,637,586 shares of Waters Corporation Common Stock, representing 7.8% of the class as of 03/31/2026.

The filing lists 6,999,247 shares as sole voting power and 7,637,586 shares as sole dispositive power. The amendment reflects holdings aggregated across certain Reporting Business Units of BlackRock and is signed by a Managing Director on 04/24/2026.

Insights

Institutional Ownership Analyst

BlackRock reports a sizable passive stake in Waters at 7.8%.

BlackRock's Schedule 13G/A amendment shows beneficial ownership of 7,637,586 shares as of 03/31/2026, with full dispositive and substantial sole voting authority recorded in the filing. The position is reported under aggregated Reporting Business Units.

Because this is a 13G/A disclosure, it is presented as a passive/investment management holding rather than an active acquisition. Subsequent filings would reveal any change in intent or voting plans.

Key Figures

Beneficial ownership: 7,637,586 shares Percent of class: 7.8% Sole voting power: 6,999,247 shares +3 more

6 metrics

Beneficial ownership 7,637,586 shares Amount beneficially owned as of 03/31/2026

Percent of class 7.8% Percent of Waters common stock as reported

Sole voting power 6,999,247 shares Shares with sole power to vote reported in Item 4

Sole dispositive power 7,637,586 shares Shares with sole power to dispose reported in Item 4

Filing type Schedule 13G/A (Amendment No. 18) Form type reported on the cover

Amendment signature date 04/24/2026 Signed by Spencer Fleming, Managing Director

Key Terms

Schedule 13G/A, beneficially owned, sole dispositive power, Reporting Business Units

4 terms

Schedule 13G/A regulatory

"Amendment No. 18 to a Schedule 13G/A reporting beneficial ownership"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

beneficially owned financial

"Amount beneficially owned: 7637586"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole dispositive power financial

"Sole power to dispose or to direct the disposition of: 7637586"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

Reporting Business Units other

"aggregated across certain Reporting Business Units of BlackRock"

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 18)

WATERS CORPORATION

(Name of Issuer)

Common Stock

(Title of Class of Securities)

941848103

(CUSIP Number)

03/31/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 941848103

1

Names of Reporting Persons

BlackRock, Inc.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 6,999,247.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 7,637,586.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

7,637,586.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.8 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: WATERS CORPORATION
(b)	Address of issuer's principal executive offices: 34 MAPLE STREET MILFORD MA 01757
Item 2.
(a)	Name of person filing: BlackRock, Inc. In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by certain business units (collectively, the "Reporting Business Units") of BlackRock, Inc. and its subsidiaries and affiliates. It does not include securities, if any, beneficially owned by other business units whose beneficial ownership of securities are disaggregated from that of the Reporting Business Units in accordance with such release.
(b)	Address or principal business office or, if none, residence: BlackRock, Inc., 50 Hudson Yards New York, NY 10001
(c)	Citizenship: See Item 4 of Cover Page
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 941848103
Item 4.	Ownership
(a)	Amount beneficially owned: 7637586
(b)	Percent of class: 7.8 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 6999247
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 7637586
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. Various persons have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of the common stock of WATERS CORPORATION. No one person's interest in the common stock of WATERS CORPORATION is more than five percent of the total outstanding common shares.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See Exhibit 99
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

BlackRock, Inc.

Signature:	Spencer Fleming
Name/Title:	Managing Director
Date:	04/24/2026

Exhibit Information

Exhibit 24: Power of Attorney Exhibit 99: Item 7

FAQ

How many Waters (WAT) shares does BlackRock report owning?

BlackRock reports beneficial ownership of 7,637,586 shares. The Schedule 13G/A amendment states this figure explicitly and ties it to 03/31/2026 as the reporting date for the holdings.

What percentage of Waters does BlackRock's stake represent?

BlackRock's holding represents 7.8% of Waters' common stock. The filing gives the percent of class as 7.8%, based on the reported 7,637,586 shares in the amendment.

Does BlackRock have voting power over these Waters shares?

Yes; the filing lists 6,999,247 shares with sole voting power. The Schedule 13G/A shows sole voting power and sole dispositive power figures for the Reporting Business Units named in the filing.

Is this an active takeover filing or a passive holding?

This Schedule 13G/A indicates passive/investment management ownership. The amendment aggregates holdings across Reporting Business Units and follows the Schedule 13G reporting framework used for passive institutional holdings.

What date is the Schedule 13G/A ownership tied to?

The reported ownership is as of 03/31/2026. The cover information and Item 4 ownership figures are anchored to that reporting date; the amendment was signed on 04/24/2026.