Ecolab (NYSE: ECL) EVP exercises options and sells 3,519 common shares

Rhea-AI Filing Summary

ECOLAB INC. executive Gregory B. Cook reported mixed insider activity involving stock options and common shares. On February 26, 2026, he exercised an Employee Stock Option for 3,800 shares at a stated price of $0.00 per option under the company’s 2010 Stock Incentive Plan, receiving 3,800 shares of common stock at $137.087 per share.

On the same date, he executed an open-market sale of 3,519 common shares at an average price of $304.25 per share, leaving 11,673.394 common shares held directly after these transactions. He also reported indirect holdings of 3,556.129 units in the Ecolab Stock Fund of the Ecolab Savings Plan as of January 31, 2026, equivalent to approximately 6,519 common shares.

Insider Trade Summary

Net Seller: 3,519 shares ($1,070,656)

Net Sell 4 txns

Insider Cook Gregory B

Role EVP & PRES - INST GROUP

Sold 3,519 shs ($1.07M)

Type	Security	Shares	Price	Value
Exercise	Employee Stock Option (Right to Buy)	3,800	$0.00	--
Exercise	Common Stock	3,800	$137.087	$521K
Sale	Common Stock	3,519	$304.25	$1.07M
holding	Common Stock	--	--	--

Holdings After Transaction: Employee Stock Option (Right to Buy) — 0 shares (Direct); Common Stock — 15,192.394 shares (Direct); Common Stock — 3,556.129 shares (Indirect, By Ecolab Savings Plan)

Footnotes (1)

1. 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.) 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.

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Cook Gregory B

(Last) (First) (Middle)

1 ECOLAB PLACE

(Street)

ST. PAUL MN 55102

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
ECOLAB INC. [ ECL ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP & PRES - INST GROUP

3. Date of Earliest Transaction (Month/Day/Year)
02/26/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	02/26/2026		M		3,800	A	$137.087	15,192.394	D
Common Stock	02/26/2026		S		3,519	D	$304.25	11,673.394	D
Common Stock								3,556.129(1)	I	By Ecolab Savings Plan

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Employee Stock Option (Right to Buy)	$137.087	02/26/2026		M			3,800	12/06/2018(2)	12/06/2027	Common Stock	3,800	$0	0	D

Explanation of Responses:

1. 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.)

2. 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.

	/s/ Corinne Lawson, as Attorney-in-Fact for Gregory B. Cook	02/27/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transactions did Ecolab (ECL) executive Gregory B. Cook report?

Gregory B. Cook reported exercising employee stock options and selling common shares. He exercised options for 3,800 shares and then sold 3,519 common shares in an open-market transaction, all dated February 26, 2026, while retaining a direct and indirect ownership stake in Ecolab.

How many ECL shares did Gregory B. Cook sell in the latest Form 4?

Gregory B. Cook sold 3,519 shares of Ecolab common stock. The transaction was an open-market sale at an average price of $304.25 per share, dated February 26, 2026, and left him with 11,673.394 common shares held directly afterward.

At what prices did Gregory B. Cook exercise options and sell Ecolab (ECL) shares?

Cook’s employee stock options were exercised at a stated price of $0.00 per option for 3,800 shares, with the resulting common stock valued at $137.087 per share. He then sold 3,519 common shares at an average price of $304.25 per share on February 26, 2026.

What is Gregory B. Cook’s remaining direct ownership in Ecolab common stock?

After the reported option exercise and share sale, Gregory B. Cook directly holds 11,673.394 shares of Ecolab common stock. These figures come from his Form 4 filing dated around February 26, 2026, which details post-transaction balances for his direct holdings.

How are Gregory B. Cook’s indirect Ecolab (ECL) holdings through the Savings Plan reported?

Cook’s indirect holdings are reported as 3,556.129 units in the Ecolab Stock Fund of the Ecolab Savings Plan as of January 31, 2026. A footnote explains these units equal approximately 6,519 shares of Ecolab’s common stock, reflecting his indirect retirement-plan exposure.

What equity plan governed Gregory B. Cook’s exercised Ecolab stock options?

The exercised stock options were granted under the Ecolab Inc. 2010 Stock Incentive Plan. A footnote states the option vested in one-third increments on each of the first and second anniversaries of grant and fully on the third anniversary, determining when shares became exercisable.