Ecolab (NYSE: ECL) director David MacLennan reports 750-share open-market buy

Rhea-AI Filing Summary

Ecolab Inc. director David W. MacLennan reported an open-market purchase of 750 shares of Ecolab common stock. The transaction took place on 12/08/2025 at a price of $257.597 per share, as shown in the Form 4 filing. Following this purchase, he beneficially owns 23,035.08 shares directly. He also has indirect ownership of 3,500 shares through the Kathleen F. MacLennan Revocable Trust and 709 shares through sibling's trusts. The filing is signed by an attorney-in-fact on his behalf, confirming the director-level insider ownership update.

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^*

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)
12/08/2025

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	12/08/2025		P		750	A	$257.597	23,035.08	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:

	/s/ Youhao Dong, as Attorney-in-Fact for David W. MacLennan	12/08/2025
	** 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.
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 transaction did Ecolab (ECL) disclose in this Form 4?

The filing shows that director David W. MacLennan bought 750 shares of Ecolab Inc. common stock on 12/08/2025 in an open-market transaction.

At what price did the Ecolab (ECL) director buy the shares?

David W. MacLennan purchased the 750 Ecolab shares at a price of $257.597 per share, according to the reported transaction details.

How many Ecolab (ECL) shares does the director own after this transaction?

After the reported purchase, David W. MacLennan beneficially owns 23,035.08 Ecolab common shares directly, plus additional indirect holdings through trusts.

What indirect Ecolab (ECL) holdings are reported for the director?

The filing lists indirect ownership of 3,500 shares through the Kathleen F. MacLennan Revocable Trust and 709 shares through sibling's trusts.

What is the relationship of the reporting person to Ecolab (ECL)?

The reporting person, David W. MacLennan, is identified as a director of Ecolab Inc. in the filing.

Is this Ecolab (ECL) Form 4 filed for one or multiple reporting persons?

The Form 4 is indicated as being filed by one reporting person, covering the transactions of David W. MacLennan only.