ECOLAB INC. — Director's Dealing 2025

May 16, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ECOLAB INC. (ECL)
CIK: 0000031462
Period of Report: 2025-05-15

Reporting Person: Cook Gregory B (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-05-15	Common Stock	M	2234	$117.730	Acquired	11369.380	Direct
2025-05-15	Common Stock	S	2234	$253	Disposed	9135.380	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-05-15	Employee Stock Option (Right to Buy)	$117.73	M	2234	Disposed	2026-12-07	Common Stock (2234)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	3515.612	Indirect

Footnotes

F1: Number of UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan (401(k) Plan) as of April 30, 2025. Includes 62.954 UNITS acquired since the reporting person's last report. (The 3,515.612 UNITS are the equivalent of approximately 6,450 shares of the issuer's Common Stock.)

F2: Option granted under the Ecolab Inc. 2010 Stock Incentive Plan. The option became or becomes exercisable, on a cumulative basis, as to one-third of the option shares (excluding any fractional portion less than one share), on each of the first and second anniversaries of the date of grant and as to the remaining shares on the third anniversary of the date of grant. The date listed in the "Date Exercisable" column is the first anniversary of the date of grant.