# EDGAR Filing Document

**Accession Number:** 0001000697
**File Stem:** 0001193125-25-145691
**Filing Date:** 2025-6
**Character Count:** 36173
**Document Hash:** 1310102826da7eaae26b9025d7562409
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-145691.hdr.sgml**: 20250624

**ACCESSION NUMBER**: 0001193125-25-145691

**CONFORMED SUBMISSION TYPE**: 11-K

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20241231

**FILED AS OF DATE**: 20250624

**DATE AS OF CHANGE**: 20250624

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** WATERS CORP /DE/
- **CENTRAL INDEX KEY:** 0001000697
- **STANDARD INDUSTRIAL CLASSIFICATION:** LABORATORY ANALYTICAL INSTRUMENTS [3826]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 133668640
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 11-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-14010
- **FILM NUMBER:** 251068472

**BUSINESS ADDRESS:**
- **STREET 1:** 34 MAPLE ST
- **CITY:** MILFORD
- **STATE:** MA
- **ZIP:** 01757
- **BUSINESS PHONE:** 5084782000

**MAIL ADDRESS:**
- **STREET 1:** 34 MAPLE STREET
- **CITY:** MILFORD
- **STATE:** MA
- **ZIP:** 01757

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** WCD INVESTORS INC /DE/
- **DATE OF NAME CHANGE:** 19960605

##### [**Table of Contents**](#toc)
**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

**Form 11-K** 

☒ **ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934** 

**For the fiscal year ended December 31, 2024** 

**Or** 

☐ **TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934** 

**For the transition period from<u> </u> to<u> </u>** 

**Commission File Number: 001-14010** 

A. Full title of the plan and the address of the plan, if different from that of the issuer name below:

## Waters Employee Investment Plan
B. Name of issuer of the securities held pursuant to the plan and the address of its principal executive office:

**Waters Corporation** 

**34 Maple Street** 

**Milford, Massachusetts 01757** 

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##### [**Table of Contents**](#toc)

---

| |
|:---|
|  **<u>Required Information</u>** |
|  <u>Financial Statements and Supplemental Schedule</u> |
|  Report of Independent Registered Public Accounting Firm |
|  Statements of Net Assets Available for Benefits as of December 31, 2024 and 2023 |
|  Statement of Changes in Net Assets Available for Benefits for the Year Ended December 31, 2024 |
|  Notes to Financial Statements |
|  Form 5500 – Schedule H, Part IV, Line 4i – Schedule of Assets (Held at End of Year) as of December 31, 2024 |

---

**<u>Exhibit</u>** 

---

| | | |
|:---|:---|:---|
| **Designation** | **Description** | **Method of Filing** |
| Exhibit 23.1 | [Consent of Grant Thornton LLP](d878671dex231.htm) | Filed with this Report |

---

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##### [**Table of Contents**](#toc)
**SIGNATURE** 

*The Plan.* Pursuant to the requirements of the Securities Exchange Act of 1934, the trustees (or other persons who administer the employee benefit plan) have duly caused this annual report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | | |
|:---|:---|:---|
|  | Waters Employee Investment Plan | Waters Employee Investment Plan |
| Date: June 24, 2025 | By: | /s/ Amol Chaubal |
|  |  | Amol Chaubal |
|  |  | Senior Vice President and Chief Financial Officer |

---

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##### [**Table of Contents**](#toc)
**WATERS EMPLOYEE INVESTMENT PLAN** 

**INDEX TO FINANCIAL STATEMENTS AND SUPPLEMENTAL SCHEDULE** 

as of December 31, 2024 and 2023

and for the Year Ended December 31, 2024

---

| | | |
|:---|:---|:---|
|  | **Page** | **Page** |
|  [Report of Independent Registered Public Accounting Firm](#fin878671_1) |  | 1 |
|  Financial Statements: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [Statements of Net Assets Available for Benefits](#fin878671_2) |  | 2 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [Statement of Changes in Net Assets Available for Benefits](#fin878671_3) |  | 3 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [Notes to Financial Statements](#fin878671_4) |  | 4 |
|  Supplemental Schedule \*: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [Form 5500 – Schedule H, Part IV, Line 4i – Schedule of Assets (Held at End of Year) as of December 31, 2024](#fin878671_5) |  | 9 |

---

\* Other supplemental schedules required by Section 2520.103-10 of the Department of Labor's Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974 have been omitted because they are not applicable.

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##### [**Table of Contents**](#toc)
**REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM** 

Employee Benefits Administration Committee, Plan Administrator, and Plan Participants

Waters Employee Investment Plan

**Opinion on the financial statements** 

We have audited the accompanying statements of net assets available for benefits of Waters Employee Investment Plan (the "Plan") as of December 31, 2024 and 2023, the related statement of changes in net assets available for benefits for the year ended December 31, 2024, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the net assets available for benefits of the Plan as of December 31, 2024 and 2023, and the changes in net assets available for benefits for the year ended December 31, 2024 in conformity with accounting principles generally accepted in the United States of America.

**Basis for opinion** 

These financial statements are the responsibility of the Plan's management. Our responsibility is to express an opinion on the Plan's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) ("PCAOB") and are required to be independent with respect to the Plan in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Plan is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Plan's internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

**Supplemental information** 

The supplemental schedule of assets (held at end of year) as of December 31, 2024 ("supplemental information") has been subjected to audit procedures performed in conjunction with the audit of the Plan's financial statements. The supplemental information is the responsibility of the Plan's management. Our audit procedures included determining whether the supplemental information reconciles to the financial statements or the underlying accounting and other records, as applicable, and performing procedures to test the completeness and accuracy of the information presented in the supplemental information. In forming our opinion on the supplemental information, we evaluated whether the supplemental information, including its form and content, is presented in conformity with the Department of Labor's Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. In our opinion, the supplemental information is fairly stated, in all material respects, in relation to the financial statements as a whole.

/s/ GRANT THORNTON LLP

We have served as the Plan's auditor since 2006.

Melville, New York

June 24, 2025

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##### [**Table of Contents**](#toc)
**WATERS EMPLOYEE INVESTMENT PLAN** 

Statements of Net Assets Available for Benefits

as of December 31, 2024 and 2023

---

| | | |
|:---|:---|:---|
|  | **December 31,** | **December 31,** |
|  | **2024** | **2023** |
|  Assets |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Investments, at fair value (Note 3) | $1240408037 | $1125279892 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Notes receivable from participants | 8282684 | 7863313 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Employer contributions receivable | 935778 | 1379350 |
|  Net assets available for benefits | $1249626499 | $1134522555 |

---

See accompanying notes to the financial statements.

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##### [**Table of Contents**](#toc)
**WATERS EMPLOYEE INVESTMENT PLAN** 

Statement of Changes in Net Assets Available for Benefits

for the Year Ended December 31, 2024

---

| | |
|:---|:---|
|  Additions |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Net investment income: |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Net appreciation in fair value of investments | $169345069.0 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Interest income | 2578837.0 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Dividend income | 11075663.0 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total investment income | 182999569.0 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Interest income on notes receivable from participants | 528175.0 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Contributions: |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Employer's contributions | 20005412.0 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Participants' contributions | 34888524.0 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Rollovers | 3860855.0 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total contributions | 58754791.0 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Other income | 76967.0 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total additions | 242359502.0 |
|  Deductions |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Benefits paid directly to beneficiaries and participants | 126709051.0 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Administrative expenses | 546507.0 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total deductions | 127255558.0 |
|  Net increase | 115103944.0 |
|  Net assets available for benefits: |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Beginning of year | 1134522555.0 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; End of year | $1249626499.0 |

---

See accompanying notes to the financial statements.

------

##### [**Table of Contents**](#toc)
**WATERS EMPLOYEE INVESTMENT PLAN** 

**Notes to Financial Statements** 

**December 31, 2024 and 2023** 

**1 Description of Plan** 

The following description of the Waters Employee Investment Plan (the "Plan") provides only general information. Participants should refer to the Plan document for a more complete description of the Plan's provisions.

*General* 

The Plan, effective August 19, 1994, was created to provide an opportunity for eligible employees of Waters Technologies Corporation ("Waters" or the "Company") and any eligible legally affiliated company to provide for their future financial security through participation in a systematic savings program to which each participating employer (the "Employer") also contributes. The Plan is a defined contribution plan covering substantially all employees of the Company and its affiliates who work in the United States. The Plan is designed to take advantage of provisions of the Internal Revenue Code of 1986, as amended (the "Code"), which allow a participant to elect to reduce taxable compensation (subject to certain limitations) with the amount of such reduction being contributed to the Plan by the Employer on behalf of the electing participant. The Plan is subject to the provisions of the Employee Retirement Income Security Act of 1974, as amended ("ERISA").

*Eligibility* 

Employees are eligible to participate and are automatically enrolled in the Plan immediately upon their date of hire or rehire. Unless the employee elects to suspend automatic contributions, the automatic participation will commence at 3% of annual eligible compensation and increase 1% each year until contributions reach 6% of annual eligible compensation.

*Contributions* 

Subject to certain limitations under the Code, participants may elect to voluntarily contribute to the Plan through payroll deductions from 1% to 60% of their annual compensation, as defined in the Plan document, on a pretax basis and/or on an after-tax basis as a Roth 401(k) contribution. Participants who have attained age 50, or who will reach age 50 during the year, may elect to make an additional pretax contribution or Roth 401(k) contribution, or both, to the Plan. As of December 31, 2024 and 2023, participants had various investment options in which to direct the investment of their contributions and Company contributions. Each investment option offers a different level of risk and expected rate of return.

For contribution purposes, compensation includes salary, lump sum cash payments of merit pay increases, commissions, overtime pay, shift differentials, short-term disability pay, unused vacation pay, bonuses paid under the performance bonus plan and annual incentive bonuses or certain other designated incentive plans. The Employer will match 100% of the first 6% of compensation contributed by the participant to the Plan on a combined pretax and Roth 401(k) basis. The Employer matching contribution is effective immediately upon date of eligibility and follows the investment elections selected by the participant for employee contributions.

Participants direct their elective contributions into various investment options offered by the Plan, which include a self-directed brokerage account feature and a Company stock fund, and can change their investments options on a daily basis.

The Plan is a Safe Harbor Plan, which provides for catch-up contributions by participants who have attained age 50 before the close of the Plan year, to satisfy the alternative methods of meeting nondiscrimination requirements, and redefine employer matching contributions.

*Participant Accounts* 

Each participant's account is credited with the participant's contributions, any applicable Employer matching contributions and an allocation of Plan earnings, and is charged with an allocation of administrative expenses to the extent that they are paid by the Plan. Certain administrative expenses are charged directly against participants' accounts. Allocations of earnings and expenses are based on the participant account balances, as defined. The benefit to which a participant is entitled is the benefit that can be provided from the participant's account balance.

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##### [**Table of Contents**](#toc)
**WATERS EMPLOYEE INVESTMENT PLAN** 

**Notes to Financial Statements** 

**December 31, 2024 and 2023** 

*Vesting* 

Participants are immediately vested in their voluntary contributions as well as Employer matching contributions, plus actual earnings thereon.

*Rollover Election* 

Employees may make an eligible rollover contribution to the Plan at any time.

*Administration* 

Fidelity Management Trust Company ("Fidelity") is the trustee and custodian for the Plan. Fidelity Investments Institutional Operations Company ("FIIOC") is the record keeper for the Plan.

*Benefits* 

Upon termination of service due to death, disability, retirement or other reason, a participant or beneficiary may elect to receive a lump-sum amount equal to the value of the participant's vested interest in his or her account balance or annual or more frequent installments over a period not to extend beyond the life expectancy of the participant. The Plan also allows participants who are actively employed and have attained the age of 59 1/2 to withdraw all or any portion of their account balance for any reason. The Plan also provides for certain hardship withdrawals.

*Administrative Expenses* 

Certain administrative expenses, including loan maintenance, brokerage account fees, Waters Corporation Stock Fund ("Stock Fund") administrative fees and in-service withdrawal fees, are paid by the participants. Other expenses, such as legal, audit and consulting fees, incurred in the administration of the Plan are paid by the Company. A portion of the operating expenses and management fees is returned to the Plan on revenue sharing arrangements. The revenue sharing amounts received are recorded as other income in the statement of changes in net assets available for benefits.

*Notes Receivable from Participants* 

Participants in the Plan may borrow from their account balance, with a maximum of two loans permitted per participant. A participant may borrow an amount greater than or equal to $1,000 but not to exceed the lesser of (a) $50,000 minus the largest outstanding loan balance in the twelve months preceding the loan request or (b) 50% of the total account balance minus current outstanding loan balances. Principal and interest are repaid through payroll deductions for a period of up to five years, except for loans made for purchasing or constructing a principal residence for which the repayment term may be up to 20 years. The loans bear interest at a fixed rate equal to the prime rate on the first business day of the calendar quarter in which the loan is funded and are collateralized by the participant's account balances. At December 31, 2024, interest rates on outstanding loans ranged from 3.25% to 8.50%.

**2 Summary of Significant Accounting Policies** 

*Basis of Accounting* 

The financial statements of the Plan are prepared on the accrual basis of accounting in conformity with accounting principles generally accepted in the United States of America ("U.S. GAAP").

*Investment Transactions and Investment Income* 

The Plan's investments are stated at fair value. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The Plan's Employee Benefits Administration Committee determines the Plan's valuation policies utilizing information provided by the investment advisers, custodians and insurance company. Purchases and sales of securities are recorded on a trade-date basis. Dividends are recorded on the ex-dividend date. Interest income is recorded on the accrual basis as earned.

Waters Corporation common stock is traded on a national securities exchange and is valued at the last reported sales price on the last business day of the year. The common stock was valued at $370.98 and $329.23 per share at December 31, 2024 and 2023, respectively.

Net appreciation includes the Plan's gains and losses on investments bought and sold as well as held during the year.

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##### [**Table of Contents**](#toc)
**WATERS EMPLOYEE INVESTMENT PLAN** 

**Notes to Financial Statements** 

**December 31, 2024 and 2023** 

*Contributions* 

Employer and participant contributions are recorded in the period in which payroll deductions are made from the participant's compensation.

*Benefit Payments* 

Benefit distributions are recorded when paid.

*Notes Receivable from Participants* 

Notes receivable from participants are measured at their unpaid principal balance plus any accrued but unpaid interest. Interest income on notes receivable from participants is recorded when it is earned. Related fees are recorded as administrative expenses and are expensed when they are incurred. If a participant ceases to make loan repayments, the Plan administrator will deem the participant loan to be a distribution in accordance with applicable legal requirements, and the participant's account balance will be reduced at the earliest permitted date as outlined in the Plan document.

*Use of Estimates* 

The preparation of the Plan's financial statements in conformity with U.S. GAAP requires the Plan administrator to make significant estimates and assumptions that affect the reported amounts of assets and liabilities and changes therein, and, when applicable, disclosures of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates.

*Risks and Uncertainties* 

The Plan provides for various investment options in any combination of stocks, bonds, fixed income securities, mutual funds and other investment securities. Investment securities are exposed to various risks, such as interest rate, market and credit risks. Due to the level of risk associated with certain investment securities, it is at least reasonably possible that changes in the values of investment securities will occur in the near term and that such changes could materially affect participants' account balances and the amounts reported in the statements of net assets available for benefits.

**3 Fair Value Measurements** 

In accordance with the accounting standards for fair value measurements and disclosures, the Plan's assets are measured at fair value on a recurring basis as of December 31, 2024 and 2023. Fair values determined by Level 1 inputs utilize observable data, such as quoted prices in active markets. Fair values determined by Level 2 inputs utilize observable data points other than quoted prices in active markets that are observable either directly or indirectly. Fair values determined by Level 3 inputs utilize unobservable data points for which there is little or no market data, which require the reporting entity to develop its own assumptions. If the Plan were to change its valuation inputs for measuring financial assets and liabilities at fair value, either due to changes in current market conditions or other factors, it would need to transfer those assets or liabilities to another level in the hierarchy based on the new inputs used. The Plan would recognize these transfers at the beginning of the reporting period in which the transfers occurred. During the years ended December 31, 2024 and 2023, there were no transfers of financial assets or financial liabilities between the hierarchy levels.

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##### [**Table of Contents**](#toc)
**WATERS EMPLOYEE INVESTMENT PLAN** 

**Notes to Financial Statements** 

**December 31, 2024 and 2023** 

The following table discloses the Plan's assets measured at fair value on a recurring basis as of December 31, 2024:

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| | | | | |
|:---|:---|:---|:---|:---|
|  | **Total**<br>**December 31, 2024** | **Quoted Prices in<br>Active Market for<br>Identical Assets**<br>**(Level 1)** | **Significant Other<br>Observable Inputs**<br>**(Level 2)** | **Significant<br>Unobservable<br>Inputs**<br>**(Level 3)** |
|  Waters Corporation Common Stock | $68447665 | $68447665 | $— | $— |
|  Interest-bearing cash | 2037077 | 2037077 |  |  |
|  Mutual funds | 108329133 | 108329133 |  |  |
|  Self-directed brokerage assets | 55331574 | 55331574 |  |  |
|  Common collective trusts | 1006262588 |  | 1006262588 |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total assets in the fair value hierarchy | $1240408037 | $234145449 | $1006262588 | $— |

---

The following table discloses the Plan's assets measured at fair value on a recurring basis as of December 31, 2023:

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| | | | | |
|:---|:---|:---|:---|:---|
|  | **Total**<br>**December 31, 2023** | **Quoted Prices in<br>Active Market for<br>Identical Assets**<br>**(Level 1)** | **Significant Other<br>Observable Inputs**<br>**(Level 2)** | **Significant<br>Unobservable<br>Inputs**<br>**(Level 3)** |
|  Waters Corporation Common Stock | $70668232 | $70668232 | $— | $— |
|  Interest-bearing cash | 1942963 | 1942963 |  |  |
|  Mutual funds | 382842675 | 382842675 |  |  |
|  Self-directed brokerage assets | 49461154 | 49461154 |  |  |
|  Common collective trusts | 620364868 |  | 620364868 |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total assets in the fair value hierarchy | $1125279892 | $504915024 | $620364868 | $— |

---

Investments in the Stock Fund are stated at fair value based on the quoted market price on the last business day of the year for the Company's common stock.

Investments with original maturities of three months or less when purchased are considered interest-bearing cash. The fair values are based on observable market prices and, therefore, have been categorized in Level 1 of the fair value hierarchy.

Investments in mutual funds are valued at the daily closing price as reported by the fund. Mutual funds held by the Plan are open-end mutual funds that are registered with the Securities and Exchange Commission ("SEC"). These funds are required to publish their daily net asset value ("NAV") and transact at that price. The mutual funds held by the Plan are deemed to be actively traded.

Investments under the self-directed brokerage account are participant-directed investments that primarily include common stocks, mutual funds, certificates of deposit ("CDs"), and cash. Common stocks are valued at the closing price as reported on the active market on which the individual securities are traded. Mutual funds are valued at the daily closing price as reported by the fund. Mutual funds held by the Plan are open-end mutual funds that are registered with the SEC. These funds are required to publish their daily NAV and transact at that price. The mutual funds held by the Plan are deemed to be actively traded. CDs are valued at amortized cost, which approximates fair value.

Investments in common collective trusts are stated at fair value based on the published NAV per unit in the trust at year end. While participant transactions for common collective trusts take place daily, certain events, such as the premature termination of the contract by the Plan or the termination of the Plan, would require a redemption notice period of up to twelve months.

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##### [**Table of Contents**](#toc)
**WATERS EMPLOYEE INVESTMENT PLAN** 

**Notes to Financial Statements** 

**December 31, 2024 and 2023** 

The methods described above may produce a fair value that may not be indicative of the net realizable value or reflective of future fair value. Furthermore, while the Plan believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date.

**4 Related-Party Transactions** 

Certain Plan investments are shares of mutual funds or collective trusts managed by an affiliate of Fidelity, a subsidiary of which is the trustee of the Plan and, therefore, these transactions qualify as party-in-interest transactions. Fees paid by the Plan to Fidelity or its affiliates for administrative services amounted to $546,507 for the year ended December 31, 2024. Transactions with respect to participant loans and the Stock Fund also qualify as party-in-interest transactions.

The Plan has investments in shares of the Company's common stock through the Stock Fund. During the year ended December 31, 2024, the Plan purchased units in the Stock Fund in the amount of $1,548,002; sold units in the Stock Fund in the amount of $12,166,203; and had net investment appreciation of $8,439,011, administrative expenses of $47,496 and interest and dividend income of $100,233. The total value of the Plan's investment in the Stock Fund, which includes the Company's common stock and related interest-bearing cash, was $70,484,742 and $72,611,195 at December 31, 2024 and 2023, respectively.

Certain operating expenses and management fees are returned to the Plan based on revenue sharing arrangements with Fidelity. As Fidelity is the trustee and custodian of the Plan, these transactions qualify as party-in-interest transactions. The revenue sharing amounts received are recorded as other income in the statement of changes in net assets available for benefits. The Plan received $76,967 in revenue sharing payments for the year ended December 31, 2024, which was used to offset $546,507 of administrative expenses incurred by the Plan.

**5 Plan Amendment and Termination** 

Although it has not expressed any intent to do so, the Company has the right under the Plan to discontinue its contributions at any time and to terminate the Plan subject to the provisions of ERISA. In the event of Plan termination, participants would remain 100% vested in their account balances.

**6 Tax Status** 

The Internal Revenue Service ("IRS") has determined and informed the Company by a letter dated October 16, 2014, that the Plan and related trust are designed in accordance with applicable sections of the Code. Although the Plan has been amended since the effective date of the determination letter, the Plan administrator believes that the Plan is designed and is currently being operated in compliance with the applicable requirements of the Code, and, therefore, believe that the Plan is qualified, and the related trust is tax-exempt.

U.S. GAAP requires Plan management to evaluate uncertain tax positions taken by the Plan. The financial statement effects of a tax position are recognized when the position is more likely than not, based on the technical merits, to be sustained upon examination by the IRS. The Plan administrator has analyzed the tax positions taken by the Plan and has concluded that as of December 31, 2024 and 2023, there are no uncertain positions taken or expected to be taken. The Plan is subject to routine audits by taxing jurisdictions; however, there are currently no audits for any tax periods in progress.

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##### [**Table of Contents**](#toc)
**WATERS EMPLOYEE INVESTMENT PLAN** 

**Form 5500 – Schedule H, Part IV, Line 4i** 

**Schedule of Assets (Held at End of Year) as of December 31, 2024** 

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| | | | | |
|:---|:---|:---|:---|:---|
|  EIN: | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;04-3234558 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;04-3234558 |  |  |
|  Plan Number 002 | Plan Number 002 |  |  |  |
| (a)<br>| (b)<br> Identity of issue, borrower, lessor or similar<br>party | (c)<br> Description of investment including maturity date,<br> rate of interest, collateral, par, or maturity value | (d)<br> Cost | (e)<br>Current<br>value |
|  **Waters Corporation Stock Fund** | **Waters Corporation Stock Fund** | **Waters Corporation Stock Fund** |  |  |
|  \* | Fidelity Management Trust Company (FMTC) | Interest-Bearing Cash | N/A | $2037077 |
|  \* | FMTC | Waters Corporation Common Stock | N/A | 68447665 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total Waters Corporation Stock Fund | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total Waters Corporation Stock Fund |  | 70484742 |
|  **Mutual funds** | **Mutual funds** |  |  |  |
|  | Allspring | Allspring Special Mid Cap Value Fund – Class R6 | N/A | 5880614 |
|  | American Funds | American Funds Washington Mutual Investors Fund - Class R6 | N/A | 31822379 |
|  | MassMutual | MassMutual Mid Cap Growth Fund – Class I | N/A | 19408038 |
|  | Invesco | Invesco Developing Markets Fund – Class R6 | N/A | 11871946 |
|  \* | FMTC | Fidelity Investments Money Market Government Portfolio - Institutional Class | N/A | 39346156 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total mutual funds | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total mutual funds |  | 108329133 |
|  **Notes receivable from participants** | **Notes receivable from participants** | **Notes receivable from participants** |  |  |
|  \* | Notes receivable from participants | Interest rates ranging from 3.25% to 8.50%; maturity dates through 2044 |  | 8282684 |
|  **Self-directed brokerage assets** | **Self-directed brokerage assets** | **Self-directed brokerage assets** |  |  |
|  \* | FMTC | Self-Directed BrokerageLink | N/A | 55331574 |
|  **Collective trusts** | **Collective trusts** |  |  |  |
|  \* | FMTC | Fidelity Freedom Blend 2010 Fund - Class R | N/A | 902809 |
|  \* | FMTC | Fidelity Freedom Blend 2015 Fund - Class R | N/A | 4005411 |
|  \* | FMTC | Fidelity Freedom Blend 2020 Fund - Class R | N/A | 33384134 |
|  \* | FMTC | Fidelity Freedom Blend 2025 Fund - Class R | N/A | 45029542 |
|  \* | FMTC | Fidelity Freedom Blend 2030 Fund - Class R | N/A | 87105065 |
|  \* | FMTC | Fidelity Freedom Blend 2035 Fund - Class R | N/A | 50680442 |
|  \* | FMTC | Fidelity Freedom Blend 2040 Fund - Class R | N/A | 57737694 |
|  \* | FMTC | Fidelity Freedom Blend 2045 Fund - Class R | N/A | 38031767 |
|  \* | FMTC | Fidelity Freedom Blend 2050 Fund - Class R | N/A | 35816889 |
|  \* | FMTC | Fidelity Freedom Blend 2055 Fund - Class R | N/A | 24892000 |
|  \* | FMTC | Fidelity Freedom Blend 2060 Fund - Class R | N/A | 13133148 |
|  \* | FMTC | Fidelity Freedom Blend 2065 Fund - Class R | N/A | 4528753 |
|  \* | FMTC | Fidelity Freedom Blend Income Fund – Class R | N/A | 5279712 |
|  \* | FMTC | Fidelity Diversified International Commingled Pool | N/A | 29328457 |
|  \* | FMTC | Fidelity Managed Income Portfolio Class II | N/A | 15805864 |
|  \* | FMTC | Fidelity Growth Company Commingled Pool | N/A | 240115755 |
|  \* | FMTC | Fidelity Institutional Asset Management U.S. Bond Index Commingled Pool - Class D | N/A | 52879433 |
|  | Geode Capital Management Trust Company | Spartan 500 Index Pool - Class D | N/A | 184235360 |
|  | Geode Capital Management Trust Company | Spartan Extended Market Index Pool - Class D | N/A | 49638023 |
|  | Geode Capital Management Trust Company | Spartan Total International Index Pool - Class D | N/A | 16910084 |
|  | American Century Funds | American Century U.S Small Cap Value Fund - Class F | N/A | 16822246 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total collective trusts | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total collective trusts |  | 1006262588 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Total investments** |  |  | $1248690721 |

---

\* Party-in-interest

## Exhibit 23.1

Exhibit 23.1

**CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM** 

We have issued our report dated June 24, 2025, with respect to the financial statements and supplemental information included in the Annual Report of Waters Employee Investment Plan on Form 11-K for the year ended December 31, 2024. We consent to the incorporation by reference of said report in the Registration Statements of Waters Corporation on Form S-8 (File No. 333-60054, File No. 333-160507, File No. 333-239020, and File No. 333-288030) and Form S-8 POS (File No. 333-183721).

/s/ GRANT THORNTON LLP

Melville, New York

June 24, 2025