Ecolab director reports acquisition of 128 shares of common stock

Ecolab Inc. director Marion K. Gross acquired 128 shares of Ecolab common stock on 12/31/2025 at a stated price of $0, increasing her directly held stake to 327.67 shares.

Accepted by SEC EDGAR 01/05/2026 - 04:48 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Ecolab Inc. director Marion K. Gross acquired 128 shares of Ecolab common stock on 12/31/2025 at a stated price of $0, increasing her directly held stake to 327.67 shares.

The reported holdings include 0.18 shares credited through the dividend reinvestment feature of the Ecolab Inc. 2001 Non-Employee Director Stock Option and Deferred Compensation Plan. The filing is made as a Form 4 by a single reporting person in her capacity as a director of Ecolab.

Insider Trade Summary

Grant/Award: 128 shares

Grant/Award 1 txn

Insider Gross Marion K.

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	128	$0.00	$0.00

Holdings After Transaction: Common Stock — 327.67 shares (Direct)

Holdings Before and After: Common Stock, 199.67 to 327.67 shares (Direct)

Footnotes (1)

1. F1. Includes 0.18 shares acquired pursuant to a dividend reinvestment feature of the Ecolab Inc. 2001 Non-Employee Director Stock Option and Deferred Compensation Plan.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Ecolab Inc. (ECL) report in this Form 4?

Director Marion K. Gross reported acquiring 128 shares of Ecolab Inc. common stock on 12/31/2025 at a stated price of $0 per share.

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

Following the reported transaction, Marion K. Gross beneficially owns 327.67 shares of Ecolab Inc. common stock in direct ownership.

What type of security was involved in this Ecolab Inc. (ECL) insider transaction?

The transaction involved common stock of Ecolab Inc., reported in Table I for non-derivative securities.

Was any derivative security activity reported for Ecolab Inc. (ECL) in this filing?

No derivative securities were reported as acquired, disposed of, or held in Table II for this Form 4.

What plan feature contributed to the fractional Ecolab Inc. (ECL) shares reported?

The position includes 0.18 shares acquired through the dividend reinvestment feature of the Ecolab Inc. 2001 Non-Employee Director Stock Option and Deferred Compensation Plan.

What is the reporting person’s relationship to Ecolab Inc. (ECL)?

The reporting person, Marion K. Gross, is identified as a Director of Ecolab Inc. and filed the form as a single reporting person.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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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^*

Gross Marion K.

(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	327.67(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 0.18 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 Marion K. Gross	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.
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.