Gregory B. Cook - 26 Feb 2026 Form 4 Insider Report for ECOLAB INC. (ECL)

Reporting relationship: EVP & PRES - INST GROUP
Issuer ticker: ECL
Reported as of: 26 Feb 2026
Net transaction value: -$549,725
SEC form: 4
Accepted by SEC: 27 Feb 2026, 16:37:39 UTC
Prior SEC filing: 20 Feb 2026
Next SEC filing: 06 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Corinne Lawson, as Attorney-in-Fact for Gregory B. Cook

Key filing fact

Gregory B. Cook filed Form 4 for ECOLAB INC. (ECL) on 27 Feb 2026.

Key facts

This page summarizes Gregory B. Cook's Form 4 filing for ECOLAB INC. (ECL).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 27 Feb 2026, 16:37.

Change

Previous filing in this sequence was filed on 20 Feb 2026.
Current net transaction value: -$549,725.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001989181 Primary reporting owner

Cook Gregory B

Relationship: EVP & PRES - INST GROUP
Address: 1 ECOLAB PLACE, ST. PAUL
Signature: /s/ Corinne Lawson, as Attorney-in-Fact for Gregory B. Cook
Signature date: 27 Feb 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ECL transaction

Common Stock

Options Exercise

Transaction value: $520,931
Shares: +3,800
Change %: +33%
Price: $137.09
Shares after: 15,192
Date: 26 Feb 2026
Ownership: Direct

ECL transaction

Common Stock

Sale

Transaction value: $1,070,656
Shares: -3,519
Change %: -23%
Price: $304.25
Shares after: 11,673
Date: 26 Feb 2026
Ownership: Direct

ECL holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 3,556
Date: 26 Feb 2026
Ownership: By Ecolab Savings Plan
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ECL transaction Derivative

Employee Stock Option (Right to Buy)

Options Exercise

Transaction value: $0
Shares: -3,800
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 26 Feb 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 3,800
Exercise price: $137.09
Footnotes: F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Number of UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan (401(k) Plan) as of January 31, 2026. (The 3,556.129 UNITS are the equivalent of approximately 6,519 SHARES of the issuer's Common Stock.)

Footnote F2

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.