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    Merck & Company Inc. filed SEC Form 8-K: Other Events, Financial Statements and Exhibits

    12/4/25 4:36:38 PM ET
    $MRK
    Biotechnology: Pharmaceutical Preparations
    Health Care
    Get the next $MRK alert in real time by email
    mrk-20251204
    0000310158False00003101582025-12-042025-12-040000310158us-gaap:CommonStockMember2025-12-042025-12-040000310158mrk:A1.875NotesDue2026Member2025-12-042025-12-040000310158mrk:A3.250NotesDue2032Member2025-12-042025-12-040000310158mrk:A2.500NotesDue2034Member2025-12-042025-12-040000310158mrk:A1.375NotesDue2036Member2025-12-042025-12-040000310158mrk:A3.500NotesDue2037Member2025-12-042025-12-040000310158mrk:A3.700NotesDue2044Member2025-12-042025-12-040000310158mrk:A3.750NotesDue2054Member2025-12-042025-12-04

    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) December 4, 2025
    Merck & Co., Inc.
    (Exact name of registrant as specified in its charter)
    New Jersey
    1-6571
    22-1918501
    (State or other jurisdiction(Commission(I.R.S Employer
    of incorporation)File Number)Identification No.)
    126 East Lincoln Avenue, Rahway, New Jersey
    07065
    (Address of principal executive offices)(Zip Code)
    (Registrant’s telephone number, including area code) (908) 740-4000
    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 classTrading Symbol(s)Name of each exchange on which registered
    Common Stock ($0.50 par value)MRKNew York Stock Exchange
    1.875% Notes due 2026MRK/26New York Stock Exchange
    3.250% Notes due 2032MRK/32New York Stock Exchange
    2.500% Notes due 2034MRK/34New York Stock Exchange
    1.375% Notes due 2036MRK 36ANew York Stock Exchange
    3.500% Notes due 2037MRK/37New York Stock Exchange
    3.700% Notes due 2044MRK/44New York Stock Exchange
    3.750% Notes due 2054MRK/54New 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 December 4, 2025, Merck & Co., Inc. (the “Company”) closed an underwritten public offering of $500,000,000 aggregate principal amount of Floating Rate Notes due 2029 (the “Floating Rate Notes”), $750,000,000 aggregate principal amount of 3.850% Notes due 2029 (the “2029 Notes”), $1,000,000,000 aggregate principal amount of 4.150% Notes due 2031 (the “2031 Notes”), $1,000,000,000 aggregate principal amount of 4.450% Notes due 2032 (the “2032 Notes”), $1,500,000,000 aggregate principal amount of 4.750% Notes due 2035 (the “2035 Notes”), $750,000,000 aggregate principal amount of 5.500% Notes due 2046 (the “2046 Notes”), $1,500,000,000 aggregate principal amount of 5.550% Notes due 2055 (the “2055 Notes”) and $1,000,000,000 aggregate principal amount of 5.700% Notes due 2065 (the “2065 Notes” and, together with the Floating Rate Notes, the 2029 Notes, the 2031 Notes, the 2032 Notes, the 2035 Notes, the 2046 notes and the 2055 Notes, collectively, the “Notes”) under the Company’s Registration Statement on Form S-3ASR (Registration No. 333-278066), originally filed with the Securities and Exchange Commission (the “Commission”) on March 19, 2024, as amended by Post-Effective Amendment No. 1, filed with the Commission on May 14, 2024.
    The Notes are being issued under an indenture dated as of January 6, 2010, between the Company and U.S. Bank Trust National Association, as trustee, a copy of which was attached as Exhibit 4.1 to the Company’s Current Report on Form 8-K previously filed with the Securities and Exchange Commission on December 10, 2010 and is incorporated herein by reference. Copies of the officers’ certificate for each series of the Notes (including forms of each of the respective Notes attached thereto) pursuant to Section 301 of the indenture governing the Notes are attached hereto as Exhibits 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7 and 4.8 and are incorporated herein by reference. The legal opinion related to these Notes is attached hereto as Exhibit 5.1 and is incorporated herein by reference.
    Item 9.01 Financial Statements and Exhibits.
    (d) Exhibits 
    Exhibit 4.1
    Floating Rate Notes due 2029 Officers’ Certificate of the Company dated December 4, 2025, including form of the Floating Rate Notes.
    Exhibit 4.2
    3.850% Notes due 2029 Officers’ Certificate of the Company dated December 4, 2025, including form of the 2029 Notes.
    Exhibit 4.3
    4.150% Notes due 2031 Officers’ Certificate of the Company dated December 4, 2025, including form of the 2031 Notes.
    Exhibit 4.4
    4.450% Notes due 2032 Officers’ Certificate of the Company dated December 4, 2025, including form of the 2032 Notes.
    Exhibit 4.5
    4.750% Notes due 2035 Officers’ Certificate of the Company dated December 4, 2025, including form of the 2035 Notes.
    Exhibit 4.6
    5.500% Notes due 2046 Officers’ Certificate of the Company dated December 4, 2025, including form of the 2046 Notes.
    Exhibit 4.7
    5.550% Notes due 2055 Officers’ Certificate of the Company dated December 4, 2025, including form of the 2055 Notes.
    Exhibit 4.8
    5.700% Notes due 2065 Officers’ Certificate of the Company dated December 4, 2025, including form of the 2065 Notes.
    Exhibit 5.1
    Opinion and Consent of Jennifer Zachary, Esq., Executive Vice President and General Counsel of the Company.
    Exhibit 23.1
    Consent of Jennifer Zachary, Esq., Executive Vice President and General Counsel of the Company (contained in Exhibit 5.1 to this Current Report on Form 8-K).
    Exhibit 104Cover Page Interactive Data File (embedded within the Inline XBRL document).



    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.
    Date: December 4, 2025
    Merck & Co., Inc.
    By:/s/ Kelly E. W. Grez
    Kelly E. W. Grez
    Corporate Secretary

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