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Table of Contents 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 Commission file number : 1-10596 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON , DC 20549 Missouri ( State or other jurisdiction of incorporation or organization ) Title of each class Common Stock , par value $ 0.01 per share 9900A Clayton Road St. Louis , Missouri ( Address of principal executive offices ) to ESCO Technologies Inc. ( Exact name of registrant as specified in its charter ) Large accelerated filer > Non - accelerated filer Registrant's telephone number , including area code : ( 314 ) 213-7200 Securities registered pursuant to section 12 ( b ) of the Act : Trading Symbol ( s ) ESE Securities registered pursuant to section 12 ( g ) of the Act : None 43-1554045 ( I.R.S. Employer Identification No. ) 63124-1186 ( Zip Code ) 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 Section 15 ( d ) of the Act . □ Yes 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 No No Name of each exchange on which registered New York Stock Exchange 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 , 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 . 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 . □ 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 Act ) . Yes No Aggregate market value of the Common Stock held by non - affiliates of the registrant as of the close of trading on March 31 , 2021 , the last business day of the registrant's most recently completed second fiscal quarter , based on the New York Stock Exchange closing price on March 31 , 2021 : approximately $ 2,770,000,000 . * * For purpose of this calculation only , without determining whether the following are affiliates of the registrant , the registrant has assumed that ( i ) its directors and executive officers are affiliates , and ( ii ) no party who has filed a Schedule 13D or 13G is an affiliate . Number of shares of Common Stock outstanding at November 20 , 2021 : 26,101,172 DOCUMENTS INCORPORATED BY REFERENCE : Part III of this Report incorporates by reference certain portions of the registrant's definitive Proxy Statement for its 2022 Annual Meeting of Shareholders , which the registrant currently anticipates first sending to shareholders on or about December 15 , 2021 ( hereinafter , the " 2021 Proxy Statement " ) .