Sec Form 4 Filing - BAKER DOUGLAS M JR @ ECOLAB INC. - 2020-06-03

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

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, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person BAKER DOUGLAS M JR 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 X __ Officer (give title below) _____ Other (specify below) Chairman and CEO (Last) (First) (Middle) 1 ECOLAB PLACE 3. Date of Earliest Transaction (MM/DD/YY) 06/03/2020 (Street) SAINT PAUL, MN55102 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 03/04/2020 G V 19,576 D $ 0 581,152 D Common Stock 06/03/2020 S( 1 ) 2,353 ( 2 ) D 578,799 ( 2 ) D Common Stock 7,050 I By Wife Common Stock 72,850 I By Julie M. Baker 2012 Irrevocable Trust Common Stock 72,500 I By Douglas M. Baker, Jr. 2012 Irrevocable Trust Common Stock 5,668.227 ( 3 ) I 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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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 of Derivative Security: 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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other BAKER DOUGLAS M JR 1 ECOLAB PLACE SAINT PAUL, MN55102 X Chairman and CEO Signatures /s/ David F. Duvick, as Attorney-in-Fact for Douglas M. Baker, Jr. 06/05/2020 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The foregoing transaction relates to the reporting person's participation in an exchange offer whereby Ecolab Inc. ("Ecolab") offered to its stockholders the ability to exchange all or a portion of their shares of Ecolab common stock for shares of ChampionX Holding Inc. ("ChampionX") common stock, which shares were immediately exchanged for Apergy Corporation ("Apergy") common stock in connection with the merger of ChampionX into a merger subsidiary of Apergy, with ChampionX surviving the merger as a wholly-owned subsidiary of Apergy. Pursuant to the terms of the exchange offer, the reporting person received 24.6667 shares of ChampionX common stock for each share of Ecolab common stock accepted in the exchange offer. ( 2 )The amount represents the number of shares of Ecolab common stock that the reporting person elected to exchange multiplied by the final proration factor of 4.7060% and represents a preliminary calculation. If the number of shares of Ecolab common stock that were actually disposed of by the reporting person in connection with the exchange offer differs from this calculation, the reporting person will file an amendment to this report, including an adjustment to the end of period holdings. ( 3 )Number of UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan (401(k) Plan) as of May 31, 2020. Includes 15.076 UNITS acquired since the reporting person's last report. (The 5,668.227 UNITS are the equivalent of approximately 10,391 SHARES of the issuer's Common Stock.)

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).

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