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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

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FORM 11-K

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(Mark One)

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OR

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ECOLAB SAVINGS PLAN AND ESOP

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ECOLAB INC.

1 Ecolab Place

Saint Paul, Minnesota 55102

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ECOLAB SAVINGS PLAN AND ESOP

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REPORT ON AUDITS OF FINANCIAL STATEMENTS

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As of December 31, 2020 and 2019

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and

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for the year ended December 31, 2020

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AND SUPPLEMENTAL SCHEDULE

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as of December 31, 2020

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

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To the Plan Administrator, Trustees, and Plan Participants of the

Ecolab Savings Plan and ESOP

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Opinion on the Financial Statements

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We have audited the accompanying statements of net assets available for benefits of Ecolab Savings Plan and ESOP (the “Plan”) as of December 31, 2020 and 2019 and the related statement of changes in net assets available for benefits for the year ended December 31, 2020, 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, 2020 and 2019, and the changes in net assets available for benefits for the year ended December 31, 2020, in conformity with accounting principles generally accepted in the United States of America.

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Basis for Opinion

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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.

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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 the Plan’s 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.

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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.

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Emphasis of Matter

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As discussed in Note 1 to the financial statements, effective December 31, 2020, the Ecolab Savings Plan and ESOP for Traditional Benefit Employees merged into the Plan. In addition, the Master Trust was terminated and converted to a trust associated with one employer plan concurrently with the merger of the Ecolab Savings Plan and ESOP for Traditional Benefit Employees into the Plan, effective December 31, 2020. Our opinion was not modified with respect to this matter.

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Supplemental Information

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The supplemental information included in Schedule H, Line 4i – Schedule of Assets (Held at End of Year) as of December 31, 2020, referred to as “supplemental information”, has been subjected to the auditing procedures performed in conjunction with 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 Department of Labor’s Rules and Regulations for Reporting and Disclosure under 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.

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We have served as the Plan’s auditor since 2015.

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STATEMENT OF NET ASSETS AVAILABLE FOR BENEFITS

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The accompanying notes are an integral part of the financial statements.

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STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS

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The accompanying notes are an integral part of the financial statements.

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NOTES TO FINANCIAL STATEMENTS

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1. DESCRIPTION OF PLAN

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The following brief description of the Ecolab Savings Plan and ESOP (the “Plan”) is provided for general information purposes only. Participants should refer to the Plan document for more complete information regarding the Plan's definitions, benefits, eligibility and other matters.

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Transfer to ChampionX Savings Plan

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Effective June 3, 2020, the Company completed the separation of its Upstream Energy business, ChampionX Holding Inc. (“ChampionX”) and ChampionX’s merger into a subsidiary of Apergy Corporation. In connection with these transactions, the accounts of active employees of ChampionX entities who were participants in the Ecolab Savings Plan and ESOP, and the corresponding $301.6 million of net assets, were transferred into the newly established ChampionX Savings Plan, and these individuals became participants in that plan.

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Transfer from the Ecolab Savings Plan and ESOP for Traditional Benefit Employees

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A participant in the Ecolab Savings Plan and ESOP for Traditional Benefit Employees ("Ecolab Traditional Benefit Savings Plan") who ceases to be employed with Ecolab Inc. and its subsidiaries and certain affiliates, and is later re-hired by the Company, becomes a participant in this Plan after satisfying the eligibility requirements.

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In that case, the Ecolab Traditional Benefit Savings Plan requires that the participant's balance in the Ecolab Traditional Benefit Savings Plan be automatically transferred to this Plan. These transfers of approximately $1.5 million during 2020 are shown as a transfer to the Plan on the Statement of Changes in Net Assets Available for Benefits.

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Plan Mergers

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During 2020, the Plan had the following plans merge into and become part of the Plan:

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Effective January 13, 2020, the Bioquell, Inc. 401(k) Profit Sharing Plan (the “Bioquell Plan”) merged into and became part of the Plan. Following the merger, participants in the Bioquell Plan became participants in the Plan and approximately $1.0 million of net assets of the Bioquell Plan transferred to the Plan.

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Effective December 31, 2020, the Ecolab Traditional Benefit Savings Plan merged into and became part of the Plan. Following the merger, participants in the Ecolab Traditional Benefit Savings Plan became participants in the Plan and $1.7 billion of net assets of the Ecolab Traditional Benefit Savings Plan transferred to the Plan.

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Master Trust

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Effective December 31, 2020, the Master Trust was terminated and converted to a trust associated with one employer plan concurrently with the merger of the Ecolab Traditional Benefit Savings Plan into the Plan. Prior to the termination, the Plan was a participating entity in the Ecolab Savings Plan Master Trust (the “Master Trust”) with assets held by Fidelity Management Trust Company (“Fidelity” or “trustee”). The Master Trust was established on January 1, 2013 to hold the qualified defined contribution investment assets of both the Plan and the Ecolab Traditional Benefit Savings Plan as sponsored by Ecolab Inc. and its subsidiaries and certain affiliates (“the Company”).

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General and Eligibility

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The Plan is a contributory qualified defined contribution plan available to certain individuals employed by the Company who are accruing benefits under the 3% cash balance formula of the Ecolab Pension Plan and employees of Nalco Company eligible for certain legacy final average pay benefits. Eligible employees regularly scheduled to work at least 20 hours per week may participate immediately in the Plan provided they are not subject to a collective bargaining agreement which does not provide for their participation. Part-time employees working fewer than 20 hours a week must be employed for a twelve consecutive month period during which they have worked at least 1,000 hours to be eligible to participate. Employee participation in the Plan is voluntary.

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The Plan is subject to the provisions of the Employee Retirement Income Security Act of 1974, as amended (“ERISA”) and the Internal Revenue Code of 1986, as amended (the “Code”).

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The Benefits Finance Committee determines the appropriateness of the Plan’s investment offerings and monitors investment performance. The Plan Administrator is responsible for administration of the Plan.

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Contributions

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Contributions are made to the Plan as participant savings contributions, participant rollover contributions, and employer matching contributions.

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Participant savings contributions are either pre-tax contributions made by the Company on behalf of participants who have agreed to have their taxable compensation reduced or Roth Savings contributions made by the Company on behalf of participants who have

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agreed to have their after-tax compensation reduced. Participants may reduce their compensation by up to 50%, subject to a statutory annual maximum of $19,500 for 2020, for the purpose of making savings contributions to the Plan.

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Participants who are at least age 50 are allowed to make additional catch-up contributions up to the statutory annual maximum ($6,500 in 2020).

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Participants may also contribute amounts representing distributions from other qualified plans (rollover).

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Participant contributions of up to 4% of eligible compensation are matched 100% by the Company and participant contributions over 4% and up to 8% of eligible compensation are matched 50% by the Company. The Plan also allows additional employer matching contributions to true-up the employer match. This true-up ensures all participants receive their full annualized employer match. The levels of matching contributions made by or on behalf of participants who are highly compensated, as defined in the Code, are subject to limitations under the code.

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The Plan contains a separate Employee Stock Ownership Plan (“ESOP”) account for employer and participant contributions which are invested in the Ecolab Stock Fund. The ESOP allows participants to elect the withdrawal of dividends paid on shares to the ESOP account.

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Vesting

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Participants are fully vested in their account at all times.

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Plan Benefits

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As participants are fully vested at all times, benefits to participants are equal to their account balances. Upon retirement, death, disability or separation from service, a distribution may be made to the participant or beneficiary equal to the participant's account balance. Employees are able to withdraw any part or all of their account balance upon attainment of age 59 1/2. Loans and in-service withdrawals for hardships are also available. A participant distribution or withdrawal from the Plan generally is subject to federal income tax and may be subject to an early withdrawal penalty, unless rolled over to a qualified plan or an individual retirement account.

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The Plan adopted certain provisions of the Coronavirus Aid, Relief, and Economic Security (“CARES”) Act which, in accordance with section 2202(a) of the CARES Act, allowed eligible participants to take a distribution of up to $100,000 from the Plan between April 1, 2020 and December 31, 2020. Participants have the option to repay the Plan’s distribution over a three-year period beginning on the day after the distribution. The Plan will execute a formal Plan amendment within the timeframe required by law.

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Notes Receivable from Participants

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Active participants (and beneficiaries who are parties in interest as defined by ERISA) are permitted to borrow from their accounts. The total amount of a participant's note may not exceed the lesser of (a) $50,000 minus the participant's highest outstanding note balance for the previous twelve-month period, or (b) 50% of the participant's interest in his or her account. When a note is granted, the appropriate account balances are reduced and a separate note account is created.

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Note payments, together with interest at a market rate determined by the Plan Administrator, are repaid generally over 5 years unless the note is for the purchase of a principal residence, in which case the term can be up to 15 years.

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Notes receivable from participants at December 31, 2020 had interest rates ranging from 3.25% to 9.44% and are due at various dates through December 2035. A participant can have no more than two notes outstanding at any time. Notes receivable from participants are collateralized by the borrower’s account balance and are repaid through ratable payroll deductions.

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Participant Accounts and Allocation

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Fidelity provides investment management, recordkeeping and trustee services for the Plan directly or indirectly through one or more of its subsidiaries. The Master Trust agreement authorizes services to be performed by the trustee, its agents or affiliates.

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Each participant's account is credited with the participant's contributions, the employer matching contributions and investment income thereon, net of Plan expenses. Allocations are based on participant earnings, account balances, or specific participant transactions, as defined. The benefit to which a participant is entitled is the benefit that can be provided from the participant’s vested account.

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All participant contributions made under the Plan are paid to and invested by Fidelity in one or more of the available investment options as directed by the participants.

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Participants are allowed to allocate their entire account balance in any combination of the available investment options. Participants can transfer their account balance among the investment options and/or change the investment of their future contributions, and earnings thereon, daily. These transfers and changes must be made in whole dollar amounts of at least $250 and/or in whole percent increments.

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Plan Termination

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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.

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2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

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Basis of Presentation

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The accompanying financial statements have been prepared on the accrual basis of accounting.

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Fully benefit-responsive investment contracts are required to be reported at contract value. Contract value is the relevant measurement attribute for that portion of the net assets available for benefits of a defined contribution plan attributable to fully benefit-responsive investment contracts because contract value is the amount participants would receive if they were to initiate permitted transactions under the terms of the Plan. Contract value represents contributions made under each contract, plus earnings, less participant withdrawals, and administrative expenses. The Statement of Net Assets Available for Benefits presents the Plan’s fully benefit-responsive investment contracts at contract value at both December 31, 2020 and 2019.

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Use of Estimates

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The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and changes therein, and disclosure of contingent assets and liabilities. Actual results could differ from those estimates.

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Valuation of Investments and Income Recognition

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Fidelity holds the Plan’s assets and executes transactions therein based upon instructions received from the Plan Administrator, the Company and the participants in the Plan. The Plan’s investments are stated at fair value, except for fully benefit-responsive investment contracts, which are reported at contract value. Fair value is the amount 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. See Note 4 for a discussion of fair value measurements.

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Interest income is recorded as earned on an accrual basis and dividend income is recorded on the ex-dividend date. Purchases and sales of securities and realized gains and losses related to sales of investments are recorded on a trade-date basis. Unrealized gains and losses are recorded based on the fair values as of the reporting date. Investment income and investment expenses of the Master Trust were allocated to the Plan according to the investment elections of participants within the Plan. In addition, certain administrative expenses were allocated to the Plan based on its pro rata share of the net assets of the Master Trust prior to its termination.

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Notes Receivable from Participants

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Notes receivable from participants are measured at their unpaid principal balances plus any accrued interest. Interest income is recorded on the accrual basis of accounting. Related fees are recorded as administrative expenses and are expensed when they are incurred. No allowance for credit losses has been recorded as of December 31, 2020 or 2019. If a participant ceases to make loan repayments and the Plan Administrator deems the participant loan to be in default, the participant loan balance is reduced and a benefit payment is recorded.

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Notes receivable from participants have been classified as an investment asset for Form 5500 reporting purposes and, accordingly, have been included as an investment in the supplemental schedule, Schedule H, line 4i – Schedule of Assets (Held at End of Year).

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Contributions

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Participant contributions are recorded in the period the employer makes the payroll deductions. Employer matching contributions are recorded based on participant contributions in the same period.

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Risks and Uncertainties

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The Plan provides for a range of investment options in various combinations of investment funds. Investments are exposed to a number of risks, such as interest rate, market and credit risks. Due to the level of risk associated with certain investment securities, including Ecolab Inc. common stock, it is at least reasonably possible that changes in the values of investment securities will occur in the near term and those changes could materially affect participants' account balances and the amounts reported in the 2020 Statement of Net Assets Available for Benefits.

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As a result of COVID-19, there has been heightened market risk and volatility associated with the pandemic, and this could materially affect participants' account balances and the amounts reported in the statements of net assets available for benefits and the statements of changes in net assets available for benefits, as mentioned above.

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Concentration of Market Risk

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At December 31, 2020 and 2019, approximately 21% and 7%, respectively, of the Plan’s total assets were invested in the common stock of the Company. The underlying value of the Ecolab Stock Fund is dependent on the performance of the Company and the market’s evaluation of such performance.

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Distributions to Participants

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Distributions to participants are recorded when paid.

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Plan Expenses

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The Company pays a portion of the administrative expenses of the Plan, which are excluded from these financial statements, and a portion is paid by Plan participants within the Plan. Certain asset management and administrative fees of the Plan are charged against the Plan’s investment results.

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New Accounting Pronouncements

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In August 2018, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement. The focus of ASU 2018-13 is to improve the effectiveness of the disclosure requirements for fair value measurements. The changes affect all plans that are required to include fair value measurement disclosures. The Plan adopted this standard effective January 1, 2020 and did not have a significant impact on the Plan’s financial statements.

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Subsequent Events

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The Plan Administrator has evaluated subsequent events through the date and time the financial statements were issued.

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The Plan was amended in December 2020 to incorporate changes in the law prior to year-end and in connection with the merger of Ecolab Traditional Benefit Savings Plan into this Plan. The restated plan document is effective January 1, 2021.  Participants should refer to the restated Plan document for more complete information regarding the Plan's definitions, benefits, eligibility, and other matters.

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3. PLAN INTEREST IN THE MASTER TRUST

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As discussed in Note 1 – Master Trust, the Master Trust was terminated concurrently with the merger of the Ecolab Traditional Benefit Savings Plan into the Plan, effective December 31, 2020.

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The Plan’s investments were included in the investments of the Master Trust prior to the merger of the Plan. Each participating retirement plan had a divided interest in the Master Trust. The value of the Plan’s interest in the Master Trust was based on the value of the Plan’s interest in the Master Trust at the beginning of the year, plus current year actual contributions and allocated investment income (loss), less actual distributions and allocated administrative expenses. Investment income (loss), investment management fees and other direct expenses relating to the Master Trust were allocated to the individual participating plans based on the average daily balances. At December 31, 2019 the Plan’s interest in the Master Trust included dividends receivable of $0.4 million.

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The following is a summary of the Master Trust investments, the Plan’s interest in the investments of the Master Trust, and the Plan’s interest percentage ownership of the Master Trust investments as of December 31, 2019:

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The following are changes in the Master Trust for the year ended December 31, 2020:

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4. FAIR VALUE MEASUREMENTS

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Accounting guidance establishes a framework for measuring fair value. That framework provides a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (level 1 measurements) and the lowest priority to unobservable inputs (level 3 measurements). The three levels of the fair value hierarchy under accounting guidance are described below:

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Level 1 - Unadjusted quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date.

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Level 2 - Inputs other than quoted prices within Level 1 that are observable for the asset or liability, either directly or indirectly; and fair value is determined through the use of models or other valuation methodologies. If the asset or liability has a specific (contractual) term, the Level 2 input must be observable for substantially the full term of the asset or liability. A significant adjustment to a Level 2 input could result in the Level 2 measurement becoming a Level 3 measurement.

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Level 3 - Inputs are unobservable for the asset or liability and include situations where there is little, if any, market activity for the asset or liability. The inputs into the determination of fair value are based upon the best information in the circumstances and may require significant management judgment or estimation.

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The asset’s or liability’s fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Valuation techniques used need to maximize the use of observable inputs and minimize the use of unobservable inputs.

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The following is a description of the valuation methodologies used for investments measured at fair value. There have been no changes in the methodologies used at December 31, 2020 and 2019.

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Registered investment companies and common stock: Investments in registered investment companies are valued at the daily closing price as reported by the fund. Investments in registered investment companies held by the Master Trust are open-end mutual funds that are registered with the Securities and Exchange Commission. These funds are required to publish their daily net asset value and to transact at that price. Investments in Ecolab Inc. and ChampionX Inc. common stock are recorded at fair value based on the quoted market price of Ecolab Inc.'s and ChampionX Inc.’s common stock on the New York Stock Exchange.

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Interest bearing cash: Investments in interest bearing cash are valued at cost plus accrued interest.

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Common/collective trusts: Investments in common/collective trusts, with the exception of the investment in fully benefit-responsive investment contracts which are measured at contract value, are recorded at the underlying net asset value per unit, which approximates fair value based on the audited financial statements of these funds. This practical expedient would not be used if it is determined to be probable that the fund will sell the investment for an amount different from the reported net asset value.

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The Plan reviews the fair value hierarchy classification on an annual basis. Changes in the ability to observe valuation inputs may result in a reclassification of levels for certain securities within the fair value hierarchy. The Plan’s policy is to recognize transfers into and out of levels within the fair value hierarchy at the end of the fiscal year in which the actual event or change in circumstances that caused the transfer occurs. There were no transfers between Levels during the years ended December 31, 2020 and 2019. When a determination is made to classify an asset or liability within Level 3, the determination is based upon the significance of the unobservable inputs to the overall fair value measurement. At December 31, 2020 and 2019, the Plan did not have any assets or liabilities classified within Level 2 or Level 3.

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The methods described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. 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.

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The following table represents the Plan’s fair value hierarchy for those assets measured at fair value on a recurring basis as of December 31, 2020:

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The following table represents the Master Trust’s fair value hierarchy for those assets measured at fair value on a recurring basis as of December 31, 2019:

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(*) Certain investments that were measured at net asset value per share (or its equivalent) have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the line items presented in Note 3.

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The following table sets forth additional disclosures of the Plan investments whose fair value is estimated using net asset value per share as of December 31, 2020:

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The following table sets forth additional disclosures of the Master Trust investments whose fair value is estimated using net asset value per share as of December 31, 2019:

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The fair value of investments in this category has been estimated using the net asset value per share of the underlying investments. All of these funds are subject to potential withdrawal safeguards to protect the interest of all participants, while providing the maximum level of liquidity that can be prudently made available to all participants. These withdrawal safeguards permit redemptions resulting from ordinary course activity, subject to certain thresholds.

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5. INVESTMENT CONTRACTS

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The investment contracts represent synthetic investment contracts. These contracts meet the fully benefit-responsive investment contract criteria and therefore are reported at contract value.

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Synthetic investment contracts – The synthetic investment contracts include wrapper contracts, which are agreements for the wrap issuer, such as a bank or insurance company, to make payments to the Plan in certain circumstances. The wrapper contracts include certain conditions and limitations on the underlying assets owned by the Plan. The wrapper contracts provide a guarantee that the credit rate will not fall below zero percent. Cash flow volatility (for example, timing of benefit payments) as well as asset underperformance can be passed through to the Plan through adjustments to future contract crediting rates. Formulas are provided in each contract that adjust renewal crediting rates to recognize the difference between the fair value and the book value of the underlying assets.

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Transacting at contract value – The Plan’s investment contracts provide for benefit responsive withdrawals and investment exchanges at contract value; however, withdrawals or investment changes prompted by an employer-initiated event, such as withdrawals resulting from the sale of a division of the Plan Sponsor, a corporate layoff or early retirement program, change(s) in the investment options of the Plan, or termination or partial termination of the Plan, may be paid at the contract’s market value, which may be less than contract value. The Plan’s ability to receive amounts due in accordance with fully benefit responsive investment contracts is dependent on the third-party issuer’s ability to meet its financial obligations. The issuer’s ability to meet its contractual obligations may be affected by future economic and regulatory developments. No events are probable of occurring that would limit the ability of the Plan to transact at contract value with the contract issuers, and that also would limit the ability of the Plan to transact at contract value with the participants.

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6. TAX STATUS

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The Plan constitutes a qualified plan and trust under Section 401(a) of the Code and therefore is exempt from federal income taxes under provisions of Section 501(a). The Plan consists of a profit sharing portion and a stock bonus portion. The stock bonus portion constitutes an employee stock ownership plan within the meaning of Section 4975(e)(7) of the Code. The Plan also complies with the provisions of Section 401(k) of the Code. A tax qualification letter, dated May 25, 2017, was received from the Internal Revenue Service (IRS). The letter stated that the Plan, as designed through February 13, 2015, was in compliance with the applicable requirements of the Code. The Plan has been amended since receiving the tax qualification letter. However, the Plan Administrator believes the Plan is currently designed and being operated in compliance with the applicable requirements of the Code and therefore believes the Plan is qualified and tax-exempt, as described above. Therefore, no provision for income taxes has been included in the Plan's financial statements.

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With the merger of the Nalco Savings Plan in 2013, the Plan acquired a small number of Puerto Rico participants. The Plan was amended to incorporate required provisions of the Puerto Rico tax code and has received a favorable determination letter dated June 11, 2018 from the Puerto Rico Treasury Department that the Plan as amended is designed in accordance with the applicable provisions of the 2011 Puerto Rico tax code. The Plan has been amended since receiving the tax qualification letter. However, the Plan Administrator believes the Plan is currently designed and being operated in compliance with the applicable requirements of the Puerto Rico Internal Revenue Code and therefore believes the Plan is qualified and tax-exempt. Therefore, no provision for Puerto Rico income taxes has been included in the Plan’s financial statements.

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U.S. GAAP requires plan management to evaluate tax positions taken by the Plan and recognize a tax liability (or asset) if the Plan has taken an uncertain position that more likely than not would not be sustained upon examination by the IRS. The Plan Administrator has analyzed tax positions taken by the Plan and has concluded that, as of December 31, 2020, there are no uncertain tax positions taken, or expected to be taken, that would require recognition of a liability or that would require disclosure in the financial statements. The Plan is subject to routine audits by taxing jurisdictions; however, there are currently no tax audits for any periods in progress.

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7. RELATED PARTY AND PARTY-IN-INTEREST TRANSACTIONS

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The trustee is authorized under contract provisions, or by ERISA regulations providing an administrative or statutory exemption, to invest in funds under its control and in securities of the Company. Participant contributions and employer matching contributions are invested in one or more of the investment fund options offered under the Plan, including the Ecolab Stock Fund. The Ecolab Stock Fund consists primarily of Ecolab Inc. common stock and also short-term investment funds under the trustee's control.

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During 2020 and 2019, the Plan and Master Trust, respectively, invested in Ecolab Inc. common stock. The Plan held 3,902,073 shares and the Master Trust held 4,825,594 shares of Ecolab Inc. common stock at December 31, 2020 and 2019, respectively. During the year ended December 31, 2020, purchases and sales of shares totaled approximately $387 million and $563 million, respectively.

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During 2020, Ecolab offered shareholders the opportunity to tender all or part of their Ecolab Inc. common stock in exchange for ChampionX Holding Inc. common stock, in advance of the June 3, 2020 merger of ChampionX Holding Inc. into Apergy Corporation, with ChampionX Inc. as the surviving publicly traded company. Participants in the Plan holding an investment in the Ecolab stock fund in the Plan as of April 24, 2020, were included in this tender offer. Participants in the Plan who chose to participate in the tender offer tendered all or part of their investment in the Ecolab stock fund for an investment in the newly created ChampionX stock fund, a unitized fund consisting of ChampionX Inc. shares and a small cash component. The ChampionX stock fund was frozen to new investments after the transaction was completed, although participants can exchange out of the ChampionX stock fund at any time prior to approximately June 2, 2022, when it is anticipated to be removed as an investment option in the Plan.  

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8. RECONCILIATION OF FINANCIAL STATEMENTS TO FORM 5500

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The following is a reconciliation of net assets available for benefits per the Plan financial statements at December 31, 2020 and 2019 to the Form 5500:

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The following is a reconciliation of the net increase in net assets available for benefits per the Plan financial statements for the year ended December 31, 2020 to the Form 5500:

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The fair value of fully benefit-responsive investment contracts is calculated using a discounted cash flow model which considers recent fee bids as determined by recognized dealers, discount rate and the duration of the underlying portfolio securities.

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SCHEDULE H, LINE 4i – SCHEDULE OF ASSETS (HELD AT END OF YEAR)

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As of December 31, 2020

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EIN 41-0231510

Plan Number: 003

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EXHIBITS

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The following documents are filed as exhibits to this Report:

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SIGNATURE

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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.

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