Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant To Section 13 Or 15(d) of The Securities Exchange Act of 1934 For The Fiscal Year December 31, 2021. Or ☐ Transition Report Pursuant To Section 13 Or 15(d) of The Securities Exchange Act of 1934 For the Transition Period from _________ to __________ Commission file number 000-27719 Southern First Bancshares, Inc. (Exact name of registrant as specified in its charter) South Carolina 58 ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended September 30, 2021 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission file number 000-27719 Southern First Bancshares, Inc. (Exact name of registrant as specified in its charter) South Carolina 58-2459561 (State or other ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended June 30, 2021 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission file number 000-27719 Southern First Bancshares, Inc. (Exact name of registrant as specified in its charter) South Carolina 58-2459561 Greenville, S.C. 296 ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended March 31, 2021 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission file number 000-27719 Southern First Bancshares, Inc. (Exact name of registrant as specified in its charter) South Carolina 58-2459561 (State or other jur ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant To Section 13 Or 15(d) of The Securities Exchange Act of 1934 For The Fiscal Year December 31, 2020. Or ☐ Transition Report Pursuant To Section 13 Or 15(d) of The Securities Exchange Act of 1934 For the Transition Period from _________ to __________ Commission file number 000-27719 Southern First Bancshares, Inc. (Exact name of registrant as specified in its charter) South Carolina 58 ...