Nicholas J. Alfano - 17 Feb 2026 Form 4 Insider Report for ECOLAB INC. (ECL)

Role: EVP & PRES - GLOBAL WATER
Signature: /s/ Corinne Lawson, as Attorney-in-Fact for Nicholas J. Alfano
Issuer symbol: ECL
Transactions as of: 17 Feb 2026
Net transactions value: -$1,581,821
Form type: 4
Filing time: 18 Feb 2026, 16:40:59 UTC
Previous filing: 05 Dec 2025
Next filing: 20 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Alfano Nicholas J.	EVP & PRES - GLOBAL WATER	1 ECOLAB PLACE, SAINT PAUL	/s/ Corinne Lawson, as Attorney-in-Fact for Nicholas J. Alfano	18 Feb 2026	0001972462

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ECL	Common Stock	Options Exercise	$1,302,492	+9,501	+201%	$137.09	14,223	17 Feb 2026	Direct	F1
transaction	ECL	Common Stock	Sale	$2,884,314	-9,501	-67%	$303.58	4,722	17 Feb 2026	Direct	F2
holding	ECL	Common Stock						1,481	17 Feb 2026	By Ecolab Savings Plan	F3

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	-9,501	-100%	$0.000000	0	17 Feb 2026	Common stock	9,501	$137.09	Direct	F4

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

Explanation of Responses:

Id	Content
F1	The total includes 3.5 shares resulting from automatic dividend reinvestment in transactions exempt pursuant to Rule 16a-11 under Section 16 of the Securities Exchange Act of 1934 since the reporting person's last report.
F2	This transaction was executed in multiple trades at prices ranging from $303.49 to $303.65, inclusive. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
F3	Number of UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan (401(k) Plan) as of January 31, 2026. Includes 4.002 UNITS acquired since the reporting person's last report. (The 1,481.033 UNITS are the equivalent of approximately 2,715 SHARES of the issuer's Common Stock.)
F4	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.