Ecolab Form 4: Michael Larson Reports 17,396.17 Shares Held

Rhea-AI Filing Summary

Michael Larson, a director of Ecolab Inc. (ECL), reported a transaction dated 09/30/2025 on Form 4 showing an acquisition of 123.23 shares of Ecolab common stock at a reported price of $0. The filing states the position after the transaction was 17,396.17 shares beneficially owned. An explanatory note clarifies that 24.57 of the shares were acquired through a dividend reinvestment feature of the company’s 2001 Non-Employee Director Stock Option and Deferred Compensation Plan. The form is signed by an attorney-in-fact on behalf of Mr. Larson with a signature date of 10/02/2025.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider LARSON MICHAEL

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	123.23	$0.00	--

Holdings After Transaction: Common Stock — 17,396.17 shares (Direct)

Footnotes (1)

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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
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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).

1. Name and Address of Reporting Person^*

LARSON MICHAEL

(Last) (First) (Middle)

C/O ECOLAB INC.

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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
09/30/2025

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	09/30/2025		A		123.23	A	$0	17,396.17(1)	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

Explanation of Responses:

1. Includes 24.57 shares acquired pursuant to a dividend reinvestment feature of the Ecolab Inc. 2001 Non-Employee Director Stock Option and Deferred Compensation Plan.

	/s/ Corinne Lawson, as Attorney-in-Fact for Michael Larson	10/02/2025
	** 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.
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FAQ

What transaction did Michael Larson report for ECL?

The Form 4 reports an acquisition of 123.23 shares of Ecolab common stock on 09/30/2025.

How many ECL shares does Michael Larson own after the reported transaction?

The filing shows beneficial ownership of 17,396.17 shares following the transaction.

Why is the reported purchase price listed as $0 on the Form 4?

The Form 4 lists the transaction price as $0 and includes a note that 24.57 shares were acquired via a dividend reinvestment feature of the director plan.

When was the Form 4 signed and by whom?

The Form 4 was signed on behalf of Michael Larson by Corinne Lawson, as Attorney-in-Fact with a signature date of 10/02/2025.

What position does Michael Larson hold at Ecolab?

The filing indicates Michael Larson is a Director of Ecolab Inc.