Donaldson Company, Inc. (NYSE: DCI), announced today that its Annual Report on Form 10-K and Notice of Annual Meeting and Proxy Statement have been filed with the U.S. Securities and Exchange Commission. Electronic copies of our Form 10-K, our Notice of Annual Meeting and Proxy Statement, and our 2009 Shareholder Letter are available on our website at http://ir.donaldson.com/shareholder_meeting.html. Shareholders may request free email or paper copies of these documents through one of the following methods:

1. By internet: www.proxyvote.com

2. By telephone: 1-800-579-1639

3. By email*: sendmaterial@proxyvote.com

* Shareholders requesting materials by email must send a blank email with your 12-digit Control Number (located on your Notice Card) in the subject line.

If you are not a current shareholder, you may request free email or paper copies of the documents by contacting Rich Sheffer, Donaldson’s Director of Investor Relations, at Richard.Sheffer@Donaldson.com or (952) 887-3753.

Donaldson has also issued its 2009 Sustainability Report in electronic format only. You can access this report at http://ir.donaldson.com.

About Donaldson Company, Inc.

Donaldson is a leading worldwide provider of filtration systems that improve people’s lives, enhance our Customers’ equipment performance, and protect our environment. We are a technology-driven company committed to satisfying our Customers’ needs for filtration solutions through innovative research and development, application expertise, and global presence. Our employees contribute to the Company’s success by supporting our Customers at our more than 100 sales, manufacturing, and distribution locations around the world.

Donaldson is a member of the S&P MidCap 400 and Russell 1000 indices, and our shares trade on the NYSE under the symbol DCI. Additional information is available at www.donaldson.com.