Entry into a Material Definitive Agreement. On August 20, 2026, Jefferson Capital Holdings, LLC (the “Issuer”), an indirect wholly-owned subsidiary of Jefferson Capital, Inc. (the “Company”) issued $100 million aggregate principal amount of 8.250% Senior Notes due 2030 (the “Add-On Notes”), pursuant to an indenture, dated as of May 2, 2025 (the “Existing Indenture”), among the Issuer, the guarantors thereto and U.S. Bank Trust Company, National Association, as trustee (the “Trustee”), as furt…

Other Events. On August 18, 2026, Jefferson Capital, Inc. (the “Company”) issued a press release regarding the proposed offering by its indirect wholly-owned subsidiary, Jefferson Capital Holdings, LLC (the “Issuer”), of $100 million aggregate principal amount of 8.250% senior notes due 2030 (the “Add-On Notes”). The Add-On Notes are proposed to be issued as additional notes under the Indenture, dated as of May 2, 2025, pursuant to which the Issuer previously issued $500 million in aggregate…

of this Current Report on Form 8-K (including Exhibit 99.1 attached hereto) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), 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, or the Exchange Act, except as expressly provided by specific reference in such a filing. ​

of this Current Report on Form 8-K (including Exhibit 99.1 attached hereto) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), 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, or the Exchange Act, except as expressly provided by specific reference in such a filing. ​

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant The information set forth under

Entry into a Material Definitive Agreement On April 22, 2026 (the “Amendment Effective Date”), CL Holdings, LLC, a Georgia limited liability company (“CL Holdings”), Jefferson Capital Systems, LLC, a Georgia limited liability company (“JCap”), JC International Acquisition, LLC, a Georgia limited liability company (“JCIA”), CFG Canada Funding, LLC, a Delaware limited liability company (“CFG” and, together with CL Holdings, JCap and JCIA, the “Borrowers”), and certain subsidiaries of the Borrow…

Director — Christopher Giles: Mr. Giles resigned to focus on his other professional commitments and as part of the Board's evolution.

The filing is about the disclosure of annual bonuses and commissions for named executive officers.

of this Current Report on Form 8-K (including Exhibit 99.1 attached hereto) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), 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, or the Exchange Act, except as expressly provided by specific reference in such a filing. ​

Completion of Acquisition or Disposition of Assets. As previously reported in the Current Report on Form 8-K filed by Jefferson Capital, Inc., a Delaware corporation (the “Company”), with the Securities and Exchange Commission (the “SEC”) on October 29, 2025, the Company entered into an Asset Purchase Agreement (the “Purchase Agreement”) with BLST Holding Company LLC, BLST Operating Company, LLC, BLST FinCo, LLC and BLST FinCo SubCo, LLC (collectively, “Bluestem”). On December 4, 2025, pursua…

of this Current Report on Form 8-K (including Exhibit 99.1 attached hereto) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), 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, or the Exchange Act, except as expressly provided by specific reference in such a filing. ​

Entry into a Material Definitive Agreement Asset Purchase Agreement On October 27, 2025, Jefferson Capital, Inc. (the “Company”) announced that its wholly owned subsidiary, Jefferson Capital Systems, LLC (“Buyer”), entered into an Asset Purchase Agreement (the “Asset Purchase Agreement”) on October 24, 2025 with BLST Holding Company LLC, BLST Operating Company, LLC, BLST FinCo, LLC and BLST FinCo SubCo, LLC (collectively, “Bluestem” or the “Sellers”) to acquire certain assets related to Selle…

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. Jefferson Capital, Inc. Date: October 28, 2025 By: /s/ Christo Realov Name: Christo Realov Title: Chief Financial Officer 3

of this Current Report on Form 8-K (including Exhibit 99.1 attached hereto) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), 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, or the Exchange Act, except as expressly provided by specific reference in such a filing. ​