Executive Change · Reg FD Disclosure

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)       July 30, 2025   SELECTIVE INSURANCE GROUP, INC. (Exact name of registrant as specified in its charter)   New Jersey   001-33067   22-2168890 (State or other jurisdiction of incorporation)   (Commission File Number)   (I.R.S. Employer Identification No.)   40 Wantage Avenue , Branchville , New Jersey   07890 (Address of principal executive offices) (Zip Code)   Registrant's telephone number, including area code   ( 973 ) 948-3000   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, par value $2 per share SIGI The Nasdaq Stock Market LLC Depositary Shares, each representing a 1/1,000th interest in a share of 4.60% Non-Cumulative Preferred Stock, Series B, without par value. SIGIP The 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. ¨           Section 5 – Corporate Governance and Management   Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.   On July 30, 2025, Wole Coaxum informed Selective Insurance Group, Inc. (“Selective”) of his resignation from the Board of Directors (“Board”), effective immediately (the “Resignation”). Mr. Coaxum’s decision to resign from the Board relates to other professional responsibilities – not any disagreement with the Company regarding its operations, policies, or practices.   With Mr. Coaxum’s Resignation, the Board size has been fixed at 11 directors, 10 of whom are independent.   Section 7 – Regulation FD   Item 7.01. Regulation FD Disclosure. On July 30, 2025, Selective issued a press release regarding the Resignation, a copy of which is included as Exhibit 99.1 attached hereto and incorporated herein by reference.   The information contained in Item 7.01 of this Current Report on Form 8-K, including Exhibit 99.1 attached hereto, is being furnished and shall not be deemed “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing. The Company makes no admission as to the materiality of any information in this report or the exhibits attached hereto.   Important information may be disseminated initially or exclusively via the Company’s corporate website, www.selective.com/investors. Investors should consult the site to access this information. Any website addresses included herein are inactive textual references only. The information contained on any such website referenced herein is not incorporated into this Current Report on Form 8-K.   Section 9 – Financial Statements and Exhibits   Item 9.01. Financial Statements and Exhibits.   (d)        Exhibits   Exhibit No.   Description of Exhibit   99.1 Press Release of Selective Insurance Group, Inc. dated July 30, 2025 104 The cover page from this Current Report on Form 8-K, formatted in Inline XBRL         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.       SELECTIVE INSURANCE GROUP, INC.         Date:   July 30, 2025 By:   /s/ Michael H. Lanza       Michael H. Lanza       Executive Vice President and General Counsel