Ecolab (NYSE: ECL) director David MacLennan adds to shareholdings

Rhea-AI Filing Summary

Ecolab Inc. director David W. MacLennan reported acquiring additional Ecolab common stock on 12/31/2025. He obtained 128 shares at a price of $0 and 43.85 shares at a price of $263.675 per share, increasing his directly held position to 23,224.05 shares of Ecolab common stock. The filing also shows indirect ownership of 3,500 shares through the Kathleen F. MacLennan Revocable Trust and 709 shares through sibling trusts. The reported total includes 17.12 shares acquired via the dividend reinvestment feature of Ecolab’s 2001 Non-Employee Director Stock Option and Deferred Compensation Plan.

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).

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^*

MacLennan David

(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)
12/31/2025

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	12/31/2025		A		128	A	$0	23,180.2(1)	D
Common Stock	12/31/2025		A		43.85	A	$263.675	23,224.05	D
Common Stock								3,500	I	By Kathleen F. MacLennan Revocable Trust u/a dated 11/07/2002
Common Stock								709	I	By sibling's trusts

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 17.12 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 David W. MacLennan	01/05/2026
	** 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.
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FAQ

What insider transaction did Ecolab (ECL) report for David W. MacLennan?

David W. MacLennan, a director of Ecolab Inc., reported acquiring additional shares of Ecolab common stock on 12/31/2025, as disclosed in a Form 4 filing.

How many Ecolab (ECL) shares did David W. MacLennan acquire and at what prices?

On 12/31/2025, he acquired 128 shares of Ecolab common stock at $0 per share and 43.85 shares at $263.675 per share.

How many Ecolab (ECL) shares does David W. MacLennan own after this transaction?

Following these transactions, David W. MacLennan beneficially owns 23,224.05 shares of Ecolab common stock directly.

Does David W. MacLennan have indirect ownership of Ecolab (ECL) shares?

Yes. He indirectly holds 3,500 shares through the Kathleen F. MacLennan Revocable Trust and 709 shares through sibling trusts.

What role did dividend reinvestment play in David W. MacLennan’s Ecolab (ECL) holdings?

The reported holdings include 17.12 shares acquired via a dividend reinvestment feature of Ecolab’s 2001 Non-Employee Director Stock Option and Deferred Compensation Plan.

What is David W. MacLennan’s relationship to Ecolab (ECL)?

David W. MacLennan is reported as a director of Ecolab Inc. in the Form 4 filing.