Ecolab (ECL) director John J. Zillmer reports 128-share acquisition

Rhea-AI Filing Summary

Ecolab Inc. director John J. Zillmer reported acquiring 128 shares of Ecolab common stock on 12/31/2025 at a price of $0 per share. After this transaction, he beneficially owned 47,591.24 shares held directly. The filing notes that this total includes 37.38 shares obtained through a dividend reinvestment feature of the Ecolab Inc. 2001 Non-Employee Director Stock Option and Deferred Compensation Plan. No derivative securities transactions were reported.

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

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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^*

ZILLMER JOHN J

(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	47,591.24(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 37.38 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 John J. Zillmer	01/05/2026
	** 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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FAQ

What insider transaction did Ecolab (ECL) report for John J. Zillmer?

Director John J. Zillmer reported acquiring 128 shares of Ecolab common stock on 12/31/2025 at a price of $0 per share.

How many Ecolab (ECL) shares does John J. Zillmer now beneficially own?

Following the reported transaction, John J. Zillmer beneficially owned 47,591.24 Ecolab common shares held directly.

What is the significance of the fractional Ecolab (ECL) shares reported?

The ownership total includes 37.38 shares acquired through a dividend reinvestment feature of the Ecolab Inc. 2001 Non-Employee Director Stock Option and Deferred Compensation Plan.

Did the Ecolab (ECL) director report any derivative securities transactions?

The filing’s derivative securities table shows no reported acquisitions or dispositions of derivative securities for this transaction.

Is John J. Zillmer a director or officer of Ecolab (ECL)?

The report identifies John J. Zillmer’s relationship to Ecolab as a Director, with the filing made for one reporting person.

How was the Form 4 for Ecolab (ECL) signed?

The Form 4 was signed by /s/ Corinne Lawson acting as Attorney-in-Fact for John J. Zillmer, dated 01/05/2026.