Nicholas J. Alfano - 07 May 2025 Form 4 Insider Report for ECOLAB INC. (ECL)

Role: EVP & PRES - GLOBAL INDUSTRIAL
Signature: /s/ Youhao Dong, as Attorney-in-Fact for Nicholas J. Alfano
Issuer symbol: ECL
Transactions as of: 07 May 2025
Transactions value $: -$1,350,679
Form type: 4
Filing time: 09 May 2025, 16:51:25
Previous filing: 21 Feb 2025
Next filing: 05 Dec 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Alfano Nicholas J.	EVP & PRES - GLOBAL INDUSTRIAL	1 ECOLAB PLACE, SAINT PAUL	/s/ Youhao Dong, as Attorney-in-Fact for Nicholas J. Alfano	2025-05-09	0001972462

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ECL	Common Stock	Options Exercise	$1.17M	+9.93K	+210.91%	$117.73	14.6K	07 May 2025	Direct	F1
transaction	ECL	Common Stock	Sale	-$2.52M	-9.93K	-67.84%	$253.75	4.71K	07 May 2025	Direct
holding	ECL	Common Stock						3.25K	07 May 2025	By Ecolab Savings Plan	F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	ECL	Employee Stock Option (Right to Buy)	Options Exercise	$0	-9.93K	-100%	$0.00	0	07 May 2025	Common Stock	9.93K	$117.73	Direct	F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
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.