Ecolab’s Bryce L. Mewhorter converts 2,948 stock units

The vesting included 1,344 shares withheld for minimum statutory tax obligations; a separate savings-plan position was equivalent to approximately 538 common shares.

Available on EDGAR 11/04/2026 - 04:41 PM EST Accepted by SEC EDGAR 11/04/2026 - 04:40 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Ecolab Inc. SVP & Corporate Controller Bryce L. Mewhorter converted 2,948 restricted stock units into 2,948 common shares on November 2, 2026. The units convert one-for-one and were granted on November 2, 2023, with all units vesting on the third anniversary. 1,344 shares were withheld for minimum statutory tax obligations tied to vesting. As of October 31, 2026, he reported an indirect position of 293.552 units in the Ecolab Stock Fund of the Ecolab Savings Plan, equivalent to approximately 538 common shares.

Insider Trade Summary

2,948 shares exercised/converted

Exercise 3 txns

Insider Mewhorter Bryce L

Role SVP & Corporate Controller

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units F4, F5	2,948	$0.00	$0.00
Exercise	Common Stock F1	2,948	$0.00	$0.00
Tax Withholding	Common Stock F2	1,344.289	$0.00	$0.00
Holding	Common Stock F3	--	--	--

Holdings After Transaction: Restricted Stock Units — 0 contracts (Direct); Common Stock — 3,054.734 shares (Direct); Common Stock — 293.552 shares (Indirect, By Ecolab Savings Plan)

Holdings Before and After: Restricted Stock Units, 2,948 to 0 contracts (Direct); Common Stock, 1,451.023 to 3,054.734 shares (Direct)

Footnotes (5)

1. F1. Includes approximately 1 share acquired under the Company's employee stock purchase plan since the last report.
2. F2. Reflects the reporting person's payment of minimum statutory tax obligations by withholding shares of Ecolab Common Stock incident to the vesting of restricted stock units in accordance with Rule 16b-3.
3. F3. Number of UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan (401(k) Plan) as of October 31, 2026. Includes 0.726 UNITS acquired since the reporting person's last report. (The 293.552 UNITS are the equivalent of approximately 538 SHARES of the issuer's Common Stock.)
4. F4. Restricted stock units convert into common stock on a one-for-one basis.
5. F5. On November 2, 2023, the reporting person was granted 2,948 restricted stock units, vesting as to 100% of the units on the third anniversary of the date of grant.

Key Figures

Restricted stock units converted: 2,948 units Common shares acquired through conversion: 2,948 shares Shares withheld for statutory taxes: 1,344 shares +2 more

5 metrics

Restricted stock units converted 2,948 units Converted on November 2, 2026

Common shares acquired through conversion 2,948 shares On November 2, 2026

Shares withheld for statutory taxes 1,344 shares Withheld in connection with vesting on November 2, 2026

Ecolab Stock Fund position 293.552 units As of October 31, 2026

Equivalent common shares Approximately 538 shares Equivalent to the reported Ecolab Stock Fund units

Key Terms

restricted stock units, Rule 16b-3, Ecolab Stock Fund

3 terms

restricted stock units technical

"Restricted stock units convert into common stock on a one-for-one basis."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Rule 16b-3 regulatory

"in accordance with Rule 16b-3"

Rule 16b-3 is a Securities and Exchange Commission regulation that exempts certain routine, pre-approved transactions by company insiders from automatic liability for short-term trading profits. It acts like a safe harbor: if an insider follows a formal plan or the board approves specific transactions in advance, profits from buying and selling company stock within six months are not automatically reclaimed. Investors care because the rule clarifies when insider trades are permissible and reduces uncertainty about potential clawbacks.

Ecolab Stock Fund technical

"Number of UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan"

FAQ

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

How many ECL restricted stock units did Bryce L. Mewhorter convert?

On November 2, 2026, Ecolab Inc. SVP & Corporate Controller Bryce L. Mewhorter converted 2,948 restricted stock units into 2,948 common shares. The units convert one-for-one and were granted on November 2, 2023, with all units vesting on the third anniversary.

How many ECL shares were withheld for taxes?

1,344 shares were withheld from Bryce L. Mewhorter's restricted-stock-unit vesting on November 2, 2026, to pay minimum statutory tax obligations in accordance with Rule 16b-3.

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^*

Mewhorter Bryce L

(Last) (First) (Middle)

1 ECOLAB PLACE

(Street)

SAINT PAUL MINNESOTA 55102

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
ECOLAB INC. [ ECL ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP & Corporate Controller

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
11/02/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	11/02/2026		M		2,948	A	$0	4,399.023(1)	D
Common Stock	11/02/2026		F(2)		1,344.289	D	$0	3,054.734	D
Common Stock								293.552	I(3)	By Ecolab Savings Plan

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
Restricted Stock Units	$0(4)	11/02/2026		M			2,948	11/02/2026(5)	11/02/2026	Common Stock	2,948	$0	0	D

Explanation of Responses:

1. Includes approximately 1 share acquired under the Company's employee stock purchase plan since the last report.

2. Reflects the reporting person's payment of minimum statutory tax obligations by withholding shares of Ecolab Common Stock incident to the vesting of restricted stock units in accordance with Rule 16b-3.

3. Number of UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan (401(k) Plan) as of October 31, 2026. Includes 0.726 UNITS acquired since the reporting person's last report. (The 293.552 UNITS are the equivalent of approximately 538 SHARES of the issuer's Common Stock.)

4. Restricted stock units convert into common stock on a one-for-one basis.

5. On November 2, 2023, the reporting person was granted 2,948 restricted stock units, vesting as to 100% of the units on the third anniversary of the date of grant.

Remarks:

	/s/ Corinne Lawson, as Attorney-in-Fact for Bryce L. Mewhorter	11/04/2026
	** 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.
* Form 4: SEC 1474 (03-26)