[Form 4] ECOLAB INC. Insider Trading Activity

Rhea-AI Filing Summary

Ecolab EVP - Human Resources Margeaux King reported routine equity transactions tied to restricted stock units. On February 25, 2026, 1,662 restricted stock units were converted into 1,662 shares of common stock on a one-for-one basis.

To cover minimum statutory tax obligations at vesting, 527.166 shares of Ecolab common stock were withheld at $306.04 per share. After these transactions, King directly holds 1,146.834 shares of common stock and 3,326 restricted stock units.

Insider Trade Summary

1,662 shares exercised/converted

Mixed 3 txns

Insider King Margeaux

Role EVP - Human Resources

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	1,662	$0.00	--
Exercise	Common Stock	1,662	$0.00	--
Tax Withholding	Common Stock	527.166	$306.04	$161K

Holdings After Transaction: Restricted Stock Units — 3,326 shares (Direct); Common Stock — 1,674 shares (Direct)

Footnotes (1)

1. 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. Restricted stock units convert into common stock on a one-for-one basis. Represents the first (out of three) vesting of units from the grant of 4,988 restricted stock units made on February 25, 2025. The vesting schedule for the grant provided for the units to vest, subject to continued employment, as to one-third of the units (excluding any fractional portion less than one unit), on each of the first and second anniversaries of the date of grant and as to the remaining units on the third 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^*

King Margeaux

(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 - Human Resources

3. Date of Earliest Transaction (Month/Day/Year)
02/25/2026

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	02/25/2026		M		1,662	A	$0	1,674	D
Common Stock	02/25/2026		F(1)		527.166	D	$306.04	1,146.834	D

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
Restricted Stock Units	(2)	02/25/2026		M			1,662	02/25/2026(3)	02/25/2028(3)	Common Stock	1,662	$0	3,326	D

Explanation of Responses:

1. 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.

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

3. Represents the first (out of three) vesting of units from the grant of 4,988 restricted stock units made on February 25, 2025. The vesting schedule for the grant provided for the units to vest, subject to continued employment, as to one-third of the units (excluding any fractional portion less than one unit), on each of the first and second anniversaries of the date of grant and as to the remaining units on the third anniversary of the date of grant.

	/s/ Corinne Lawson, as Attorney-in-Fact for Margeaux M. King	02/25/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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