Company Update

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 Date of Report (Date of earliest event reported): January 15, 2026     Parsons Corporation (Exact name of Registrant as Specified in Its Charter)     Delaware 001-07782 95-3232481 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)           14291 Park Meadow Drive, Suite 100   Chantilly , Virginia   20151 (Address of Principal Executive Offices)   (Zip Code)   Registrant’s Telephone Number, Including Area Code: (703) 988-8500   Not Applicable (Former Name or Former Address, if Changed Since Last Report)   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 each exchange on which registered Common Stock, $1 par value   PSN   New York Stock Exchange 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 8.01 Other Events. On January 15, 2026, Parsons Corporation announced the signing and closing of a Stock Purchase Agreement for the acquisition of Altamira Technologies Corporation by Parsons Government Service, Inc. A copy of the press release is attached hereto. Item 9.01 Financial Statements and Exhibits.   (d) Exhibits: The following exhibits are furnished as part of this Report pursuant to Item 8.01 99.1 See attached press release 104 Cover Page Interactive Data File (embedded within the Inline XBRL document) The information disclosed pursuant to Items 9.01 of this Current Report on Form 8-K, including the exhibit, shall not be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, of the Securities Exchange Act of 1934, as amended. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.       Parsons Corporation         Date: January 15, 2026 By: /s/ Michael R. Kolloway       Michael R. Kolloway       Chief Legal Officer