UNITED STATES
 SECURITIES AND EXCHANGE COMMISSION
 WASHINGTON, D.C. 20549
 _____________________________________________________________
 FORM 10-Q/A
 Amendment No. 1
 _____________________________________________________________
 (Mark One)
 xQUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED APRIL 30, 2019 ORoTRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM _________________ TO _________________.
 Commission File Number 1-7891
 DONALDSON COMPANY, INC.
 (Exact name of registrant as specified in its charter)
 Delaware41-0222640(State or other jurisdiction of(I.R.S. Employerincorporation or organization)Identification No.)
 1400 West 94th Street
 Minneapolis, Minnesota 55431
 (Address of principal executive offices, including zip code)
 Registrant’s telephone number, including area code: (952) 887-3131
 Not Applicable
 (Former name, former address and former fiscal year, if changed since last report)
 Securities registered pursuant to Section 12(b) of the Act:
 Title of each classTrading Symbol(s)Name of each exchange on which registeredCommon Stock, $5.00 par valueDCINew York Stock Exchange
 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. x Yes o 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). x Yes o No
 Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, 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. (Check one):
 Large accelerated filerxAccelerated fileroNon-accelerated fileroSmaller reporting companyoEmerging growth companyo
 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 is a shell company (as defined in Rule 12b-2 of the Exchange Act).
 o Yes x No
 Indicate the number of shares outstanding of each of the issuer's classes of common stock, as of the latest practicable date: common stock, $5 par value - 127,527,035 shares as of May 31, 2019 .
 
 
  
 
 
 EXPLANATORY NOTE
 
 This Amendment No. 1 to Quarterly Report on Form 10-Q for the fiscal quarter ended April 30, 2019 is filed solely to correct the date of the quarter end included in Exhibit 32, which was incorrectly stated in the original filing.  This amendment comprises the revised text of Part II, Item 6, amended to reflect the filing of currently dated certificates as Exhibit 31 and Exhibit 32.
 
 
 PART II. OTHER INFORMATION
 
 Item 6.Exhibits31-A – Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 200231-B – Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 200232 – Certifications of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
 
 
 
 
 
  
 
 
 SIGNATURES
 Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this Amendment, to be signed on its behalf by the undersigned thereunto duly authorized.
 DONALDSON COMPANY, INC.(Registrant)
 
 Date: December 6, 2019By:/s/ Tod E. CarpenterTod E. CarpenterChairman, President andChief Executive Officer(duly authorized officer)Date: December 6, 2019By:/s/ Scott J. RobinsonScott J. RobinsonSenior Vice President andChief Financial Officer(principal financial officer)Date: December 6, 2019By:/s/ Peter J. KellerPeter J. KellerCorporate Controller(principal accounting officer)
 
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