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X UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 Form 10 - K Annual Report Pursuant to Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 for the fiscal year ended July 31 , 2021 or Transition Report Pursuant to Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 for the transition period from to Delaware ( State or other jurisdiction of incorporation or organization ) Title of each class Common Stock , $ 5.00 par value Commission File Number : 1-7891 d Donaldson . DONALDSON COMPANY , INC . ( Exact name of registrant as specified in its charter ) 1400 West 94th Street , Minneapolis , Minnesota 55431 ( Address of principal executive offices ) ( Zip Code ) FILTRATION SOLUTIONS 41-0222640 ( I.R.S. Employer Identification No. ) Registrant's telephone number , including area code : ( 952 ) 887-3131 Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) DCI ■ Name of each exchange on which registered New York Stock Exchange Securities registered pursuant to Section 12 ( g ) of the Act : NONE Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes No Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes > No Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes No Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . Yes No Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , a smaller reporting company or an emerging growth company . See the definitions of " large accelerated filer , " " accelerated filer , " " smaller reporting company " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . Large accelerated filer Non - accelerated filer Accelerated filer Smaller reporting company U Emerging growth company If an emerging growth company , indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13 ( a ) of the Exchange Act.O Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404 ( b ) of the Sarbanes - Oxley Act ( 15 U.S.C. 7262 ( b ) ) by the registered public accounting firm that prepared or issued its audit report . Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes > No As of January 31 , 2021 , the last business day of the registrant's most recently completed second fiscal quarter , the aggregate market value of voting and non - voting common stock held by non - affiliates of the registrant was $ 7,459,060,097 ( based on the closing price of $ 59.44 as reported on the New York Stock Exchange as of that date ) . As of September 10 , 2021 , 124,010,864 shares of the registrant's common stock , par value $ 5.00 per share , were outstanding . Documents Incorporated by Reference Portions of the registrant's Proxy Statement for its 2021 annual meeting of stockholders ( the " 2021 Proxy Statement " ) are incorporated by reference in Part III , as specifically set forth in Part III .