ECOLAB INC. — Director's Dealing 2025

May 9, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ECOLAB INC. (ECL)
CIK: 0000031462
Period of Report: 2025-05-07

Reporting Person: Alfano Nicholas J. (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-05-07	Common Stock	M	9930	$117.730	Acquired	14638.166	Direct
2025-05-07	Common Stock	S	9930	$253.750	Disposed	4708.166	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-05-07	Employee Stock Option (Right to Buy)	$117.730	M	9930	Disposed	2026-12-07	Common Stock (9930)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	3246.715	Indirect

Footnotes

F1: Since the date of the reporting person's last ownership report, he transferred 10,749 shares of Ecolab common stock to his ex-spouse pursuant to a domestic relations order. The reporting person no longer reports as beneficially owned any securities owned by his ex-spouse.

F2: Number of UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan (401(k) Plan) as of April 30, 2025. Includes 7.375 UNITS acquired since the reporting person's last report. (The 3,246.715 UNITS are the equivalent of approximately 5,956 SHARES of the issuer's Common Stock.)

F3: 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.