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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
29644	Donaldson Co Inc	DCI	Industrial & Commercial Fans & Blowers & Air Purifing Equip (3564)	410222640

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1226579	C Norman Linnell	1400 West 94Th Street Bloomington MN 55413	Vice President	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2010-03-30	21,534	$12.94	92,515	No	4	M	Direct
Common Stock	Disposition	2010-03-30	21,534	$46.03	70,981	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Stock Option (right to buy)	Disposition	2010-03-30	21,534	$0.00	21,534	$12.94

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
7,626	2001-03-27	2010-08-01	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	2,739	Indirect	By Benefit Plan Trust
Common Stock	8,187	Indirect	By Benefit Plan Trust

Footnotes

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at a price ranging from $44.00 - $44.19, inclusive. The reporting person undertakes to provide to Donaldson Company, Inc., any security holder of Donaldson Company, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4.