[Form 4] ECOLAB INC. Insider Trading Activity

Rhea-AI Filing Summary

Ecolab director Marion K. Gross reported a purchase of 123.23 shares of Ecolab common stock on 09/30/2025, increasing her beneficial ownership to 199.49 shares. The transaction is reported on a Form 4 signed by an attorney-in-fact on 10/02/2025. The filing shows the acquisition as a non-derivative transaction (code V) with a reported price of $0 on the line item; the form lists ownership as Direct (D). No additional explanatory text or material context is provided in the filing.

Positive

• Director acquisition of 123.23 shares, increasing holdings to 199.49

Negative

• None.

Insights

Corporate Governance Expert

Insider purchase of 123.23 shares raised direct holdings to 199.49.

The Form 4 discloses a non-derivative acquisition on 09/30/2025 by director Marion K. Gross. The filing records the transaction code V and indicates direct beneficial ownership of 199.49 shares following the trade.

This is a routine disclosure of an insider purchase and helps investors see changes in director-level ownership. The filing contains no further detail on the reason for the transfer or any accompanying derivative activity.

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).

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)
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	199.49	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:

	/s/ Corinne Lawson, as Attorney-in-Fact for Marion K. Gross	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.
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 transaction did the ECL Form 4 report?

The filing reports a non-derivative acquisition of 123.23 shares of Ecolab common stock on 09/30/2025.

Who reported the transaction on the Form 4 for ECL?

The reporting person is Marion K. Gross, listed as a Director of Ecolab; the form is signed by an attorney-in-fact on 10/02/2025.

How many Ecolab shares does the reporting person own after the transaction?

The Form 4 shows beneficial ownership of 199.49 shares following the reported transaction.

What transaction code and ownership form are shown on the Form 4?

The entry uses transaction code V and lists the ownership form as Direct (D).

Does the Form 4 provide the purchase price for the shares?

The line item in the filing lists a price of $0 for the reported acquisition; no additional price explanation is provided in the filing.