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☑ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D. C. 20549 FORM 10 - Q QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period 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 : 01-07698 to ACME UNITED CORPORATION ( Exact Name of Registrant as Specified in Its Charter ) Connecticut State or Other Jurisdiction of Incorporation or Organization 1 Waterview Drive , Shelton , Connecticut Address of Principal Executive Offices Registrant's telephone number , including area code : ( 203 ) 254-6060 06-0236700 I.R.S. Employer Identification No. Securities registered pursuant to Section 12 ( b ) of the Act : Title of each class $ 2.50 par value Common Stock Trading Symbol ACU 06484 Zip Code Name of each exchange on which registered NYSE American 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 ( sec . 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 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 filer Non - accelerated filer Emerging growth company ☐ Accelerated filer Smaller Reporting Company No ☑ 凶 ☑ 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 ( s ) of the Exchange Act □ Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes ☐ 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 USC . 7262 ( b ) ) by the registered public accounting firm that prepared or issued its audit report . Yes ☑ No □ Registrant had 3,559,687 shares of its $ 2.50 par value Common Stock outstanding as of November 5 , 2021 .