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( Mark One ) ☐ 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 September 30 , 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 ) Commission file number 001-27038 NUANCE COMMUNICATIONS , INC . ( Exact name of Registrant as Specified in its Charter ) 1 Wayside Road Burlington , Massachusetts ( Address of Principal Executive Offices ) Title of Each Class Common stock , $ 0.001 par value ( Zip Code ) Registrant's telephone number , including area code : ( 781 ) 565-5000 SECURITIES REGISTERED PURSUANT TO SECTION 12 ( b ) OF THE ACT : Name of Each Exchange on Which Registered Nasdaq Stock Market LLC Trading Symbol ( s ) NUAN 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 o No p 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 o No p 94-3156479 ( I.R.S. Employer Identification No. ) 01803 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 þ No o Large accelerated filer Non - accelerated filer Indicate by check mark whether the registrant has submitted electronically and every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S - T ( § 232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . Yes þ No o 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 . ( Check one ) : Accelerated filer Emerging growth company Smaller reporting company ooo 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 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 . Yes No Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes □ No þ As of March 31 , 2021 , the aggregate market value of the registrant's common stock held by non - affiliates of the registrant was $ 10.0 billion based on the closing sale price as reported on the Nasdaq Global Select Market for such date . The number of shares of the registrant's common stock , outstanding as of October 31 , 2021 , was 319,452,053 . DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant's definitive Proxy Statement to be delivered to stockholders in connection with the registrant's 2022 Annual Meeting of Stockholders are incorporated by reference into Part III of this Form 10 - K .