Gregory B. Cook - 19 May 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
Issuer symbol: ECL
Transactions as of: 19 May 2025
Net transactions value: $0
Form type: 4
Filing time: 21 May 2025, 17:28:53 UTC
Previous filing: 16 May 2025
Next filing: 05 Dec 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	21 May 2025	0001989181

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ECL	Common Stock	Gift	$0	-65	-0.71%	$0.000000	9,070	19 May 2025	Direct	F1
holding	ECL	Common Stock						3,516	19 May 2025	By Ecolab Savings Plan	F2

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

Explanation of Responses:

Id	Content
F1	Represents a charitable donation of shares.
F2	Number of UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan (401(k) Plan) as of April 30, 2025. (The 3,515.612 UNITS are the equivalent of approximately 6,450 shares of the issuer's Common Stock.)