XNYS:ECL Ecolab Inc Insider Activity 4 Filing - 6/1/2012

Effective Date 6/1/2012

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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 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 *
GATES WILLIAM H III
  2. Issuer Name and Ticker or Trading Symbol
ECOLAB INC [ECL]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) __X__ Other (specify below)
See footnotes (2) and (3)
(Last)
(First)
(Middle)
ONE MICROSOFT WAY
3. Date of Earliest Transaction (Month/Day/Year)
06/01/2012
(Street)

REDMOND, WA 98052
4. If Amendment, Date Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
___ Form filed by One Reporting Person
_X_ 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 (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 06/01/2012   P   383,656 A $61.8359(1) 27,385,004 I(2) by Cascade Investment, L.L.C.(3)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 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
GATES WILLIAM H III
ONE MICROSOFT WAY
REDMOND, WA 98052
    X   See footnotes (2) and (3)
CASCADE INVESTMENT LLC
2365 CARILLON POINT
KIRKLAND, WA 98033
      See footnote (2)

Signatures

 /s/ Alan Heuberger, Attorney-in-fact for William H. Gates III   06/05/2012
** Signature of Reporting Person Date

 /s/ Cascade Investment, L.L.C. by Alan Heuberger as attorney-in-fact for Michael Larson, Business Manager   06/05/2012
** Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) This transaction was executed in multiple trades at prices ranging from $61.72 to $61.9550. The price set forth above reflects the weighted-average price per share. 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 transactions were effected.
(2) For purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended (the "Act"), Mr. Gates, as the sole member of Cascade Investment, L.L.C. ("Cascade") and co-trustee of Bill & Melinda Gates Foundation Trust ("Trust"), may be deemed to beneficially own more than 10% of the common stock of the Issuer. Mr. Gates has no pecuniary interest in the shares held by the Trust. Neither the filing of this Form 4 nor any of its contents shall be deemed an admission that Mr. Gates and any other person or persons constitute a "group" under Section 13(d) and Mr. Gates expressly disclaims membership in a group.
(3) For purposes of Section 13(d) of the Act, Cascade may be deemed to be a member of a "group" that beneficially owns more than 10% of the common stock of the Issuer. Neither the filing of this Form 4 nor any of its contents shall be deemed an admission that Cascade and any other person or persons constitute a "group" under Section 13(d) or is otherwise subject to Section 16 of the Act and Cascade expressly disclaims membership in a group.

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XNYS:ECL Ecolab Inc Insider Activity 4 Filling

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XNYS:ECL Ecolab Inc Insider Activity 4 Filing - 6/1/2012
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