ECOLAB INC. — Director's Dealing 2010

Apr 13, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ECOLAB INC (ECL)
CIK: 0000031462
Period of Report: 2010-04-12

Reporting Person: BILLER LESLIE S (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-04-12	Common Stock	M	24000	$20.2344	Acquired	82322.47	Direct
2010-04-12	Common Stock	F	10788	$45.015	Disposed	71534.47	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-04-12	Stock Option (Right to Buy)	$20.2344	M	24000	Disposed	2010-05-12	Common Stock (24000)	Direct

Footnotes

F1: Reflects the reporting person's payment of the exercise price and withholding taxes for a stock option issued in accordance with Rule 16b-3 by delivering or withholding shares of Ecolab Common Stock.

F2: The exercise price for the stock option has been halved and the number of shares subject to the option doubled to reflect a 2-for-1 stock split paid June 6, 2003 subsequent to the original reporting of the option.