Margeaux M. King - 25 Feb 2026 Form 4 Insider Report for ECOLAB INC. (ECL)

Role: EVP - Human Resources
Signature: /s/ Corinne Lawson, as Attorney-in-Fact for Margeaux M. King
Issuer symbol: ECL
Transactions as of: 25 Feb 2026
Net transactions value: -$161,334
Form type: 4
Filing time: 26 Feb 2026, 16:36:53 UTC
Previous filing: 05 Dec 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
King Margeaux	EVP - Human Resources	1 ECOLAB PLACE, ST. PAUL	/s/ Corinne Lawson, as Attorney-in-Fact for Margeaux M. King	25 Feb 2026	0001940649

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ECL	Common Stock	Options Exercise	$0	+1,662	+13850%	$0.000000	1,674	25 Feb 2026	Direct
transaction	ECL	Common Stock	Tax liability	$161,334	-527	-31%	$306.04	1,147	25 Feb 2026	Direct	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	Restricted Stock Units	Options Exercise	$0	-1,662	-33%	$0.000000	3,326	25 Feb 2026	Common Stock	1,662		Direct	F2, F3

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

Explanation of Responses:

Id	Content
F1	Reflects the reporting person's payment of minimum statutory tax obligations by withholding shares of Ecolab Common Stock incident to the vesting of restricted stock units in accordance with Rule 16b-3.
F2	Restricted stock units convert into common stock on a one-for-one basis.
F3	Represents the first (out of three) vesting of units from the grant of 4,988 restricted stock units made on February 25, 2025. The vesting schedule for the grant provided for the units to vest, subject to continued employment, as to one-third of the units (excluding any fractional portion less than one unit), on each of the first and second anniversaries of the date of grant and as to the remaining units on the third anniversary of the date of grant.