Alexander A. De Boo - 24 Nov 2025 Form 4 Insider Report for ECOLAB INC. (ECL)

Role: EVP & PRES - GLOBAL MARKETS
Signature: /s/ Youhao Dong, as Attorney-in-Fact for Alexander A. De Boo
Issuer symbol: ECL
Transactions as of: 24 Nov 2025
Transactions value $: -$124,986
Form type: 4
Filing time: 25 Nov 2025, 18:28:50 UTC
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
De Boo Alexander A.	EVP & PRES - GLOBAL MARKETS	1 ECOLAB PLACE, SAINT PAUL	/s/ Youhao Dong, as Attorney-in-Fact for Alexander A. De Boo	25 Nov 2025	0001844358

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ECL	Common Stock	Options Exercise	$256K	+2.15K	+43.11%	$119.12	7.15K	24 Nov 2025	Direct
transaction	ECL	Common Stock	Sale	-$381K	-1.42K	-19.89%	$268.25	5.73K	24 Nov 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	Employee Stock Option (Right to Buy)	Options Exercise	$0	-2.15K	-100%	$0.00	0	24 Nov 2025	Common Stock	2.15K	$119.12	Direct	F1

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

Explanation of Responses:

Id	Content
F1	Option granted under the Ecolab Inc. 2010 Stock Incentive Plan. The option became 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

Option granted under the Ecolab Inc. 2010 Stock Incentive Plan. The option became 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.