Ownership Submission
FORM 3
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Aronson Martha Goldberg
2. Date of Event Requiring Statement (Month/Day/Year)
05/08/2014
3. Issuer Name and Ticker or Trading Symbol
ECOLAB INC [ECL]
(Last)
(First)
(Middle)
370 WABASHA STREET NORTH
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
EVP & Pres.-Global Healthcare
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

SAINT PAUL, MN 55102
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 Beneficially Owned
1.Title of Security
(Instr. 4)
2. Amount of Securities Beneficially Owned
(Instr. 4)
3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)
4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 1,646
D
 
Common Stock 4,000
I
By Martha G. Aronson Revocable Trust

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)
2. Date Exercisable and Expiration Date
(Month/Day/Year)
3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)
4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)
6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Restricted Stock Units   (1)   (1) Common Stock 4,960 $ (1) D  
Employee Stock Option (Right to Buy) 08/01/2013(2) 08/01/2022 Common Stock 31,000 $ 65.595 D  
Employee Stock Option (Right to Buy) 12/05/2013(3) 12/05/2022 Common Stock 19,600 $ 71.54 D  
Employee Stock Option (Right to Buy) 12/04/2014(4) 12/04/2023 Common Stock 13,990 $ 103.265 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Aronson Martha Goldberg
370 WABASHA STREET NORTH
SAINT PAUL, MN 55102
      EVP & Pres.-Global Healthcare  

Signatures

David F. Duvick, as Attorney-in-Fact for Martha Goldberg Aronson 05/16/2014
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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).
(1) Award granted under the Ecolab Inc. 2010 Stock Incentive Plan on August 1, 2012. Each restricted stock unit represents a contingent right to receive one share of Ecolab Inc. common stock. The units will vest, subject to continued employment, as to 2,480 units on the second anniversary of the date of grant and as to the remaining 2,480 units on the third anniversary of the date of grant.
(2) Option granted under the Ecolab Inc. 2010 Stock Incentive Plan on August 1, 2012. The option will become exercisable, on a cumulative basis, as to one-third of the option shares (excluding any fractional portion less than one share), on each of the first and second anniversaries of the date of grant and as to the remaining shares on the third anniversary of the date of grant.
(3) Option granted under the Ecolab Inc. 2010 Stock Incentive Plan on December 5, 2012. The option will become exercisable, on a cumulative basis, as to one-third of the option shares (excluding any fractional portion less than one share), on each of the first and second anniversaries of the date of grant and as to the remaining shares on the third anniversary of the date of grant.
(4) Option granted under the Ecolab Inc. 2010 Stock Incentive Plan on December 4, 2013. The option will become exercisable, on a cumulative basis, as to one-third of the option shares (excluding any fractional portion less than one share), on each of the first and second anniversaries of the date of grant and as to the remaining shares on the third anniversary of the date of grant.

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