Results of Operations

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 December 11, 2025 0-7928 Date of Report (Date of earliest event reported) Commission File Number (Exact name of registrant as specified in its charter) Delaware 11-2139466 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification Number) 305 N 54th Street , Chandler , Arizona 85226 (Address of Principal Executive Offices) (Zip Code) ( 480 ) 333-2200 (Registrant’s telephone number, including area code) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol(s) Name of exchange on which registered Common Stock, par value $0.10 per share CMTL Nasdaq Stock Market LLC Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).                                      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. Item 2.02    Results of Operations and Financial Condition. On December 11, 2025, Comtech Telecommunications Corp. (the “Company”) issued a press release announcing its results of operations for its first quarter ended October 31, 2025. A copy of the press release issued by the Company concerning the foregoing results is furnished herewith as Exhibit 99.1 and is incorporated herein by reference. The information in this Item 2.02 (including the exhibit hereto) relating to this announcement shall not be deemed filed under the Securities and Exchange Commission’s rules and regulations and shall not be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended. Item 9.01    Financial Statements and Exhibits. (d) Exhibits. Exhibit Number Description 99.1 Press Release, dated December 11, 2025, reporting the financial results of the Company for its fiscal quarter ended October 31, 2025 (furnished and not filed herewith solely pursuant to Item 2.02). 104 Cover Page Interactive Data File (embedded within the Inline XBRL Document) SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, Comtech Telecommunications Corp. has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. COMTECH TELECOMMUNICATIONS CORP. Dated:    December 11, 2025 By:     /s/ Michael A. Bondi     Name:    Michael A. Bondi Title:    Chief Financial Officer