ECOLAB INC. — Director's Dealing 2025

Dec 5, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ECOLAB INC. (ECL)
CIK: 0000031462
Period of Report: 2025-12-03

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

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-12-03	Employee Stock Option (Right to Buy)	$268.515	A	8119	Acquired	2035-12-03	Common Stock (8119)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	4718.139	Direct
Common Stock	1477.031	Indirect

Footnotes

F1: The total includes 9.972 shares resulting from automatic dividend reinvestment in transactions exempt pursuant to Rule 16a-11 under Section 16 of the Securities Exchange Act of 1934.

F2: Number of UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan (401(k) Plan) as of November 30, 2025. Includes 12.533 UNITS acquired since the reporting person's last report. Since the last report, the reporting person transferred 3,265.492 SHARES (equivalent to 1,782.217 UNITS) 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. (The 1,477.031 UNITS are the equivalent of approximately 2,710 SHARES of the issuer's Common Stock.)

F3: The option will be 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.