Gregory B. Cook - May 15, 2025 Form 4 Insider Report for ECOLAB INC. (ECL)

Role: EVP & PRES - INST GROUP
Signature: /s/ Youhao Dong, as Attorney-in-Fact for Gregory B. Cook
Stock symbol: ECL
Transactions as of: May 15, 2025
Transactions value $: -$302,193
Form type: 4
Date filed: 5/16/2025, 05:13 PM
Previous filing: Feb 21, 2025
Next filing: May 21, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Cook Gregory B	EVP & PRES - INST GROUP	1 ECOLAB PLACE, ST. PAUL	/s/ Youhao Dong, as Attorney-in-Fact for Gregory B. Cook	2025-05-16	0001989181

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ECL	Common Stock	Options Exercise	$263K	+2.23K	+24.45%	$117.73	11.4K	May 15, 2025	Direct
transaction	ECL	Common Stock	Sale	-$565K	-2.23K	-19.65%	$253.00	9.14K	May 15, 2025	Direct
holding	ECL	Common Stock						3.52K	May 15, 2025	By Ecolab Savings Plan	F1

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	-2.23K	-100%	$0.00	0	May 15, 2025	Common Stock	2.23K	$117.73	Direct	F2

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

Explanation of Responses:

Id	Content
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.

Content

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.)

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.