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Table of Contents ( 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 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 Commission File Number : 0-25434 Brooks Automation , Inc. ( Exact name of Registrant as Specified in Its Charter ) Delaware ( State or Other Jurisdiction of Incorporation or Organization ) 15 Elizabeth Drive Chelmsford , Massachusetts ( Address of Principal Executive Offices ) Title of Each Class Common Stock , $ 0.01 par value Non - accelerated filer 978-262-2400 ( Registrant's telephone number , including area code ) Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbols BRKS Securities registered pursuant to Section 12 ( g ) of the Act : None 04-3040660 ( I.R.S. Employer Identification No. ) No Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15 ( d ) of the Securities Exchange Act of 1934. Yes No 01824 ( Zip Code ) Name of Each Exchange on Which Registered The Nasdaq Stock Market LLC 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 da 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 ( §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 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 Accelerated filer Smaller reporting company 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 . □ 0 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 . No Indicate by check mark whether the registrant is a shell company ( as defined in Exchange Act Rule 12b - 2 ) . Yes The aggregate market value of the registrant's Common Stock , $ 0.01 par value , held by non - affiliates of the registrant as of March 31 , 2021 , was approximately $ 4,368,656,224 based on the closing price per share of $ 81.65 on March 31 , 2021 on the Nasdaq Stock Market . As of March 31 , 2021 , 74,293,797 shares of the registrant's Common Stock , $ 0.01 par value , were outstanding . As of November 8 , 2021 , 74,347,053 shares of the registrant's Common Stock , $ 0.01 , par value , were outstanding . DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant's Proxy Statement involving the election of directors , which is expected to be filed within 120 days after the end of the registrant's fiscal year , are incorporated by reference in Part III of this Report .