MICHAEL LARSON - 12 May 2025 Form 4 Insider Report for ECOLAB INC. (ECL)

Role: Director
Signature: /s/ Youhao Dong, as Attorney-in-Fact for Michael Larson
Issuer symbol: ECL
Transactions as of: 12 May 2025
Net transactions value: $0
Form type: 4
Filing time: 14 May 2025, 16:56:42 UTC
Previous filing: 17 Apr 2025
Next filing: 02 Jul 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
LARSON MICHAEL	Director	C/O ECOLAB INC., 1 ECOLAB PLACE, ST. PAUL	/s/ Youhao Dong, as Attorney-in-Fact for Michael Larson	14 May 2025	0001098825

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	ECL	Common Stock						17,095	12 May 2025	Direct

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	Non-Employee Director Stock Option (Right to Buy)	Award	$0	+810		$0.000000	810	12 May 2025	Common Stock	810	$255.76	Direct	F1

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

Explanation of Responses:

Id	Content
F1	The option will become exercisable, on a cumulative basis, as to 25% of the option shares (excluding any fractional portion less than one share), on the last day of each of the first, second and third three-month periods following its date of grant and as to the remaining shares on the last day of the fourth three-month period following its date of grant; provided, however, that if a Change in Control of the Company (as that term is defined in the Ecolab Inc. 2001 Non-Employee Director Stock Option and Deferred Compensation Plan) will occur, then the option will become immediately exercisable in full. The date listed in the Date Exercisable column represents the first vesting date.

Content

The option will become exercisable, on a cumulative basis, as to 25% of the option shares (excluding any fractional portion less than one share), on the last day of each of the first, second and third three-month periods following its date of grant and as to the remaining shares on the last day of the fourth three-month period following its date of grant; provided, however, that if a Change in Control of the Company (as that term is defined in the Ecolab Inc. 2001 Non-Employee Director Stock Option and Deferred Compensation Plan) will occur, then the option will become immediately exercisable in full. The date listed in the Date Exercisable column represents the first vesting date.