X0202 SCHEDULE 13G/A 0000950170-25-020377 0001218749 XXXXXXXX LIVE 1 Common Stock, par value $0.01 per share 06/30/2026 0001090009 Southern First Bancshares, Inc. 842873101 6 Verdae Boulevard Greenville SC 29607 Rule 13d-1(c) Endeavour Capital Advisors Inc. DE 0 662860 0 662860 662860 N 7.0 IA Endeavour Regional Bank Opportunities Fund II L.P. DE 0 388364 0 388364 388364 N 4.1 PN Laurence M. Austin X1 0 662860 0 662860 662860 N 7.0 IN HC Mitchell J. Katz X1 0 662860 0 662860 662860 N 7.0 IN HC Jonah Marcus X1 0 662860 0 662860 662860 N 7.0 IN HC Southern First Bancshares, Inc. 6 Verdae Boulevard, Greenville, SC 29607 This Schedule 13G is being jointly filed by each of the following persons pursuant to Rule 13d-1(k)(1) promulgated by the Securities and Exchange Commission pursuant to Section 13 of the Act, with respect to shares of Common Stock, par value $0.01 per share (the "Common Stock") of Southern First Bancshares, Inc. (the "Issuer"): (i) Endeavour Capital Advisors Inc. ("Endeavour"), (ii) Endeavour Regional Bank Opportunities Fund II L.P. (the "Fund"), (iii) Laurence M. Austin, (iv) Mitchell J. Katz and (v) Jonah Marcus. Endeavour Capital Advisors Inc. 410 Greenwich Avenue Greenwich, CT 06830 Endeavour is a Delaware corporation, the Fund is a Delaware limited partnership and Messrs. Austin, Katz and Marcus are citizens of the United States of America. Y The information in items 5 through 9 on the cover pages of this Schedule 13G is hereby incorporated by reference. The ownership percentages are based on 9,471,755 shares of Common Stock outstanding as of July 28, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 3, 2026. The information in item 11 of the cover pages of this Schedule 13G is hereby incorporated by reference. The information in item 5 of the cover pages of this Schedule 13G is hereby incorporated by reference. The information in item 6 of the cover pages of this Schedule 13G is hereby incorporated by reference. The information in item 7 of the cover pages of this Schedule 13G is hereby incorporated by reference. The information in item 8 of the cover pages of this Schedule 13G is hereby incorporated by reference. Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. Endeavour Capital Advisors Inc. /s/ Glenn Hofsess* 08/14/2026 Endeavour Regional Bank Opportunities Fund II L.P. /s/ Glenn Hofsess* 08/14/2026 Laurence M. Austin /s/ Laurence M. Austin* 08/14/2026 Mitchell J. Katz /s/ Mitchell J. Katz* 08/14/2026 Jonah Marcus /s/ Jonah Marcus* 08/14/2026 *The Reporting Persons disclaim beneficial ownership in the shares reported herein except to the extent of their pecuniary interest therein, and this report shall not otherwise be deemed an admission that any of them is the beneficial owner of such securities for purposes of Section 13(d) or Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.