Gregory B. Cook - 04 May 2026 Form 4 Insider Report for ECOLAB INC. (ECL)

Reporting relationship: Co-COO - Global Businesses
Issuer ticker: ECL
Reported as of: 04 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 06 May 2026, 16:58:25 UTC
Prior SEC filing: 27 Feb 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 06 May 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: 06 May 2026, 16:58.

Change

Previous filing in this sequence was filed on 27 Feb 2026.
Current net transaction value: $0.

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: Co-COO - Global Businesses
Address: 1 ECOLAB PLACE, ST. PAUL
Signature: /s/ Corinne Lawson, as Attorney-in-Fact for Gregory B. Cook
Signature date: 06 May 2026

Reported non-derivative transactions

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

ECL transaction

Common Stock

Options Exercise

Transaction value
Shares: +8,396
Change %: +72%
Price
Shares after: 20,069
Date: 04 May 2026
Ownership: Direct
Footnotes: F1

ECL transaction

Common Stock

Tax liability

Transaction value
Shares: -3,829
Change %: -19%
Price: $257.92^*
Shares after: 16,241
Date: 04 May 2026
Ownership: Direct
Footnotes: F2

ECL holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 3,615
Date: 04 May 2026
Ownership: By Ecolab Savings Plan
Footnotes: F3

Reported derivative securities

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

ECL transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -8,396
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 04 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 8,396
Exercise price
Footnotes: F1, F4

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

On May 4, 2022, the reporting person was granted 8,396 restricted stock units, vesting as to 100% of the units on the fourth anniversary of the date of grant.

Footnote F2

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.

Footnote F3

Number of UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan (401(k) Plan) as of April 30, 2026. Includes 58.726 UNITS acquired since the reporting person's last report. (The 3,614.855 UNITS are the equivalent of approximately 6,635 shares of the issuer's Common Stock.)

Footnote F4

Restricted stock units convert into common stock on a one-for-one basis.