Ecolab Inc. (NYSE: ECL) Co-COO Cook sells 4,567 shares around $285

Rhea-AI Filing Summary

ECOLAB INC. officer Gregory B. Cook, Co-COO – Global Businesses, reported an open-market sale of 4,567.424 shares of Common Stock on August 11, 2026 at a weighted average price of $285.128 per share, with individual trades executed between $285.1277 and $285.265. After this sale, Cook directly holds 11,673.394 shares. In addition, he has an indirect interest through 3,624.511 UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan, which are stated as the equivalent of approximately 6,650 shares of Common Stock.

Insider Trade Summary

Net Seller: 4,567.424 shares

Net Sell 2 txns

Insider Cook Gregory B

Role Co-COO - Global Businesses

Sold 4,567.424 shs ($1.30M)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	4,567.424	$285.128	$1.30M
holding	Common Stock F2	--	--	--

Holdings After Transaction: Common Stock — 11,673.394 shares (Direct); Common Stock — 3,624.511 shares (Indirect, By Ecolab Savings Plan)

Footnotes (2)

1. F1. This transaction was executed in multiple trades at prices ranging from $285.1277 to $285.265, inclusive. The price reported above reflects the weighted average purchase 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.
2. F2. Number of UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan (401(k) Plan) as of July 31, 2026. Includes 9.656 UNITS acquired since the reporting person's last report. (The 3,624.511 UNITS are the equivalent of approximately 6,650 SHARES of the issuer's Common Stock.)

Key Figures

Shares sold: 4,567.424 shares Weighted average sale price: $285.128 per share Sale price range: $285.1277–$285.265 per share +3 more

6 metrics

Shares sold 4,567.424 shares Common Stock sale on August 11, 2026

Weighted average sale price $285.128 per share Weighted average across multiple trades

Sale price range $285.1277–$285.265 per share Price range for the executed trades

Direct holdings after sale 11,673.394 shares Direct Common Stock position following the transaction

Savings Plan UNITS 3,624.511 UNITS Ecolab Stock Fund units, ≈6,650 shares equivalent as of July 31, 2026

Share equivalent of UNITS ≈6,650 shares Equivalence of 3,624.511 UNITS in Ecolab Savings Plan

Key Terms

weighted average purchase price, Ecolab Savings Plan (401(k) Plan), Ecolab Stock Fund, UNITS

4 terms

weighted average purchase price financial

"The price reported above reflects the weighted average purchase price."

The weighted average purchase price is the average cost per share you paid across multiple buys, calculated so larger purchases count more than smaller ones. Imagine buying apples at different prices: the overall price you effectively paid depends on how many apples you bought at each price. Investors use it to measure true cost basis, calculate gains or losses, decide when to sell, and manage taxes and portfolio performance.

Ecolab Savings Plan (401(k) Plan) financial

"Number of UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan (401(k) Plan)..."

Ecolab Stock Fund financial

"Number of UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan..."

UNITS financial

"Includes 9.656 UNITS acquired since the reporting person's last report."

Units are bundled securities sold as one package in a financing—commonly a share paired with an instrument that gives the holder the right to buy more shares later. For investors this matters because a unit’s extra component can change future supply of shares and potential returns, similar to buying a combo with a coupon that can be redeemed later and alter what you actually receive and what others might own.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/11/2026 - 04:59 PM Accepted by SEC EDGAR 08/11/2026 - 04:58 PM Learn about SEC filing dates

FAQ

What transaction did ECL insider Gregory B. Cook report on this Form 4?

Gregory B. Cook reported an open-market sale of 4,567.424 shares of ECOLAB INC. Common Stock on August 11, 2026 at a weighted average price of $285.128 per share, with trades between $285.1277 and $285.265.

How many ECL shares does Gregory B. Cook hold directly after the reported sale?

Following the reported sale, Gregory B. Cook directly holds 11,673.394 shares of ECOLAB INC. Common Stock. This figure reflects his direct ownership position after selling 4,567.424 shares at a weighted average price of $285.128 per share.

Does Gregory B. Cook have indirect holdings in ECOLAB INC. (ECL)?

Yes. Cook has an indirect interest in 3,624.511 UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan, described as equivalent to approximately 6,650 shares of ECOLAB INC. Common Stock as of July 31, 2026.

At what prices were Gregory B. Cook’s ECL share sales executed?

The sale was executed in multiple trades at prices ranging from $285.1277 to $285.265 per share. The Form 4 reports a weighted average price of $285.128 per share for the 4,567.424 shares sold.

What is Gregory B. Cook’s role at ECOLAB INC. (ECL) related to this Form 4?

Gregory B. Cook is an officer of ECOLAB INC., serving as Co-COO – Global Businesses. The Form 4 reports his personal trading activity and his post-transaction direct and indirect holdings in the company’s Common Stock.

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 MINNESOTA 55102

(City) (State) (Zip)

UNITED STATES

(Country)

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)
	Co-COO - Global Businesses

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/11/2026

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

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

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

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	08/11/2026		S		4,567.424	D	$285.128(1)	11,673.394	D
Common Stock								3,624.511(2)	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

Explanation of Responses:

1. This transaction was executed in multiple trades at prices ranging from $285.1277 to $285.265, inclusive. The price reported above reflects the weighted average purchase 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.

2. Number of UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan (401(k) Plan) as of July 31, 2026. Includes 9.656 UNITS acquired since the reporting person's last report. (The 3,624.511 UNITS are the equivalent of approximately 6,650 SHARES of the issuer's Common Stock.)

Remarks:

	/s/ Corinne Lawson, as Attorney-in-Fact for Gregory B. Cook	08/11/2026
	** 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.
* Form 4: SEC 1474 (03-26)