Ecolab director buys 3,690 shares at ~$277

An Ecolab director disclosed open-market purchases totaling 3,690 ECL shares on September 11, 2026.

Rhea-AI Filing Summary

ECOLAB INC. (ECL) director Eric Mark Green reported open-market purchases of the company’s common stock on September 11, 2026. He bought a total of 3,690 shares in two transactions at weighted average prices of $276.58 and $277.29 per share, with each trade executed in multiple lots within narrow price ranges. No Rule 10b5-1 trading plan is reported for these purchases.

Insider Trade Summary

Net Buyer: 3,690 shares

Net Buy 2 txns

Insider Green Eric Mark

Role Director

Bought 3,690 shs ($1.02M)

Type	Security	Shares	Price	Value
Purchase	Common Stock F1	3,370	$276.577	$932K
Purchase	Common Stock F2	320	$277.291	$89K

Holdings After Transaction: Common Stock — 7,947.28 shares (Direct)

Footnotes (2)

1. F1. This transaction was executed in multiple trades at prices ranging from $276.370 to $276.890, inclusive. The price reported above reflects the weighted average purchase price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
2. F2. This transaction was executed in multiple trades at prices ranging from $277.120 to $277.410, inclusive. The price reported above reflects the weighted average purchase price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

Key Figures

Total shares purchased: 3,690 shares Shares in first transaction: 3,370 shares Weighted average price (first transaction): $276.5770 per share +2 more

5 metrics

Total shares purchased 3,690 shares Common stock bought by director on September 11, 2026

Shares in first transaction 3,370 shares Common stock purchase on September 11, 2026

Weighted average price (first transaction) $276.5770 per share Executed in multiple trades from $276.370 to $276.890

Shares in second transaction 320 shares Common stock purchase on September 11, 2026

Weighted average price (second transaction) $277.2910 per share Executed in multiple trades from $277.120 to $277.410

Key Terms

weighted average purchase price, open market or private transaction, Rule 10b5-1

3 terms

weighted average purchase price financial

"The price reported above reflects the weighted average purchase price."

The weighted average purchase price is the average cost per share you paid across multiple buys, calculated so larger purchases count more than smaller ones. Imagine buying apples at different prices: the overall price you effectively paid depends on how many apples you bought at each price. Investors use it to measure true cost basis, calculate gains or losses, decide when to sell, and manage taxes and portfolio performance.

open market or private transaction financial

"Purchase in open market or private transaction"

Rule 10b5-1 regulatory

"No Rule 10b5-1 trading plan is reported for these purchases"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

FAQ

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

What did ECL director Eric Mark Green report in this Form 4?

He reported open-market purchases of Ecolab common stock totaling 3,690 shares on September 11, 2026 in two separate transactions.

How many ECL shares did the director buy in each transaction?

He purchased 3,370 shares at a weighted average price of $276.58 per share and an additional 320 shares at a weighted average price of $277.29 per share.

What prices were paid for the ECL shares in these transactions?

The first purchase had a weighted average price of $276.5770, with individual trades between $276.370 and $276.890. The second had a weighted average of $277.2910, with trades between $277.120 and $277.410.

Were the ECL share purchases under a Rule 10b5-1 trading plan?

No. The filing’s Rule 10b5-1 checkbox is not marked as being made under such a plan, and the footnotes do not indicate any trading plan.

Is there detail on the individual trade prices for the ECL purchases?

Yes. Footnotes state that each transaction was executed in multiple trades within specified price ranges and that full trade-level details will be provided upon request to the SEC staff, Ecolab, or any security holder.

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

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Available on EDGAR 09/14/2026 - 04:40 PM Accepted by SEC EDGAR 09/14/2026 - 04:35 PM Learn about SEC filing dates

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^*

Green Eric Mark

(Last) (First) (Middle)

C/O ECOLAB INC.

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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/11/2026

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	09/11/2026		P		3,370	A	$276.577(1)	7,627.28	D
Common Stock	09/11/2026		P		320	A	$277.291(2)	7,947.28	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. This transaction was executed in multiple trades at prices ranging from $276.370 to $276.890, inclusive. The price reported above reflects the weighted average purchase price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

2. This transaction was executed in multiple trades at prices ranging from $277.120 to $277.410, inclusive. The price reported above reflects the weighted average purchase price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

Remarks:

	/s/ Youhao Dong, as Attorney-in-Fact for Eric M. Green	09/14/2026
	** 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)