DESCRIPTION OF PLAN	12 Months Ended
Dec. 31, 2025
ECOLAB PUERTO RICO SAVINGS PLAN
DESCRIPTION OF PLAN
DESCRIPTION OF PLAN	Notes to financial statements 1. Description of Plan The following brief description of the Ecolab Puerto Rico Savings Plan (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. The Plan is sponsored by Ecolab Inc. (“Ecolab”) for the benefit of certain individuals employed by Ecolab’s wholly owned subsidiary, Ecolab Manufacturing Inc. (the “Company”), and is subject to income taxation under Puerto Rico laws. General and Eligibility The Plan is a contributory qualified defined contribution plan available to certain employees of the Company in Puerto Rico. Eligible employees who are employed by the Company and who are subject to income taxation under the laws of Puerto Rico may participate in the Plan as of the first day of the month on or after their date of hire, provided they are not subject to a collective bargaining agreement which does not provide for their participation in the Plan. Employee participation in the Plan is voluntary. The Plan is subject to the provisions of the Employee Retirement Income Security Act of 1974, as amended (“ERISA”) and the Puerto Rico tax code (“the Code”). The Plan and trust are located and qualified only in Puerto Rico. 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. Contributions Contributions are made to the Plan as pre-tax savings contributions, participant rollover contributions and employer matching contributions. Pre-tax savings contributions are contributions made by the Company on behalf of participants who have agreed to have their taxable compensation reduced. Participants may reduce their compensation (subject to a Puerto Rico statutory annual maximum of $15,000 for 2025) for the purpose of making pre-tax savings contributions to the Plan. Participants who have attained age 50 or above are allowed to make additional catch-up contributions in accordance with Puerto Rico laws (up to $1,500 in 2025). Participants may also contribute amounts representing distributions from other qualified plans (rollover). 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 contributions made by or on behalf of participants who are highly compensated, as defined in the Code, are subject to limitations under the Code. The Plan contains a separate Ecolab Inc. Common Stock account for employer and participant contributions which are invested in Ecolab common stock. The fund allows participants to elect the withdrawal of dividends paid on shares to the account. Vesting Participants are fully vested in their accounts at all times. Plan Benefits 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 may be eligible to withdraw 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 taxation under the tax rules applicable to Puerto Rico residents. Notes Receivable from Participants 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. 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 10 years. Notes receivable from participants at December 31, 2025 had interest rates ranging from 4.25% to 9.50% and are due at various dates through August 2030. 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. Participant Accounts and Allocation Banco Popular de Puerto Rico (“Banco Popular” or “trustee”) provides investment management, recordkeeping and trustee services for the Plan directly or indirectly through one or more of its subsidiaries. The trust agreement authorizes services to be performed by the trustee, its agents or affiliates. 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. All participant contributions made under the Plan are paid to and invested by Banco Popular in one or more of the available investment options as directed by the participants. 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. Plan 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 Ecolab has the right to terminate the Plan subject to the provisions of ERISA.

DESCRIPTION OF PLAN

12 Months Ended

Dec. 31, 2025

Notes to financial statements

1. Description of Plan

The following brief description of the Ecolab Puerto Rico Savings Plan (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.

The Plan is sponsored by Ecolab Inc. (“Ecolab”) for the benefit of certain individuals employed by Ecolab’s wholly owned subsidiary, Ecolab Manufacturing Inc. (the “Company”), and is subject to income taxation under Puerto Rico laws.

General and Eligibility

The Plan is a contributory qualified defined contribution plan available to certain employees of the Company in Puerto Rico. Eligible employees who are employed by the Company and who are subject to income taxation under the laws of Puerto Rico may participate in the Plan as of the first day of the month on or after their date of hire, provided they are not subject to a collective bargaining agreement which does not provide for their participation in the Plan. Employee participation in the Plan is voluntary.

The Plan is subject to the provisions of the Employee Retirement Income Security Act of 1974, as amended (“ERISA”) and the Puerto Rico tax code (“the Code”). The Plan and trust are located and qualified only in Puerto Rico.

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.

Contributions

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

Pre-tax savings contributions are contributions made by the Company on behalf of participants who have agreed to have their taxable compensation reduced. Participants may reduce their compensation (subject to a Puerto Rico statutory annual maximum of $15,000 for 2025) for the purpose of making pre-tax savings contributions to the Plan.

Participants who have attained age 50 or above are allowed to make additional catch-up contributions in accordance with Puerto Rico laws (up to $1,500 in 2025).

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

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 contributions made by or on behalf of participants who are highly compensated, as defined in the Code, are subject to limitations under the Code.

The Plan contains a separate Ecolab Inc. Common Stock account for employer and participant contributions which are invested in Ecolab common stock. The fund allows participants to elect the withdrawal of dividends paid on shares to the account.

Vesting

Participants are fully vested in their accounts at all times.

Plan Benefits

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 may be eligible to withdraw 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 taxation under the tax rules applicable to Puerto Rico residents.

Notes Receivable from Participants

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.

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 10 years.

Notes receivable from participants at December 31, 2025 had interest rates ranging from 4.25% to 9.50% and are due at various dates through August 2030. 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.

Participant Accounts and Allocation

Banco Popular de Puerto Rico (“Banco Popular” or “trustee”) provides investment management, recordkeeping and trustee services for the Plan directly or indirectly through one or more of its subsidiaries. The trust agreement authorizes services to be performed by the trustee, its agents or affiliates.

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.

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

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.

Plan 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 Ecolab has the right to terminate the Plan subject to the provisions of ERISA.