Exhibit 99.1

Unless otherwise expressly stated or the context otherwise requires, as used in this Exhibit 99.1, the terms “we,” “us,” “the Company,” “Southern First,” and “our” refer collectively to Southern First Bancshares, Inc. and its subsidiaries on a combined basis. References to the “Bank” refer to Southern First Bank, our banking subsidiary.

This Exhibit 99.1 contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, Section 21E of the Securities Exchange Act of 1934, as amended, and the U.S. Private Securities Litigation Reform Act of 1995. Statements included in this Exhibit 99.1 that are not historical in nature are intended to be, and are hereby identified as, forward-looking statements. The words “may,” “will,” “anticipate,” “should,” “would,” “believe,” “contemplate,” “expect,” “estimate,” “continue,” “could,” “seek to,” “strive,” “focus,” “predict,” “project,” “potential,” “assume,” and “intend,” as well as other similar words and expressions of the future, are intended to identify forward-looking statements. We caution readers that forward-looking statements are estimates reflecting our judgment based on current information and are subject to certain risks and uncertainties that could cause actual results to differ materially from anticipated results, including the matters described under “Risk Factors” and “Special Note Regarding Forward-Looking Statements” in the Preliminary Prospectus Supplement and the accompanying prospectus and in our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q and other reports filed with the Securities and Exchange Commission. In addition, actual results for the three months ended March 31, 2026 may differ materially from the preliminary financial information included in this Exhibit 99.1 as a result of the completion of our financial closing procedures, our consideration of subsequent events and other developments arising prior to the finalization of our financial statements for such period. You should not place undue reliance on our forward-looking statements. Each forward-looking statement speaks only as of the date of the particular statement, and we do not intend, and assume no obligation, to update any forward-looking statement, except as required by law.

Excerpt from Preliminary Prospectus Supplement, dated April 15, 2026

Preliminary First Quarter 2026 Financial Information (Unaudited)

Our unaudited consolidated financial statements as of and for the three months ended March 31, 2026 are not yet available. The following preliminary financial information for the quarter ended March 31, 2026 is based solely on management’s estimates derived from internal management reports and currently available preliminary information and remains subject to the completion of our financial closing procedures and other customary quarter-end review procedures, including our consideration of subsequent events. These procedures may result in material changes to the preliminary financial information set forth below. Our independent registered public accounting firm has not audited, reviewed, compiled or performed any procedures with respect to this preliminary financial information and, accordingly, does not express an opinion or any other form of assurance with respect thereto. The preliminary financial information set forth below is not a complete presentation of our financial results as of and for the three months ended March 31, 2026, and the final results as of and for the three months ended March 31, 2026 may differ materially from the preliminary results set forth below. Accordingly, you should not place undue reliance on this preliminary financial information. In addition, the estimates set forth below constitute forward-looking statements and are subject to risks and uncertainties. These estimates should be read together with our Annual Report on Form 10-K and other filings with the SEC, as well as the section captioned “Special Note Regarding Forward-Looking Statements” in this prospectus supplement. We undertake no obligation to update or revise this preliminary financial information prior to the release of our final financial results for the quarter ended March 31, 2026, except as required by law.

The following tables present selected preliminary financial information for the quarter ended or as of March 31, 2026, as applicable:

Selected Preliminary Operating Metrics

Selected Preliminary Balance Sheet, Asset Quality and Capital Metrics

Compared to the quarter ended December 31, 2025, we expect:

For the quarter ended March 31, 2026 or as of March 31, 2026, as applicable, we also expect:

Non-GAAP Financial Measures

Tangible common equity to tangible assets and efficiency ratio are non-GAAP financial measures. Tangible common equity to tangible assets is calculated as total common equity less total intangible assets, divided by total assets less total intangible assets. Efficiency ratio is calculated as total noninterest expense divided by total revenue, adjusted to exclude net gains on sale of securities. Management believes these non-GAAP financial measures provide investors with useful supplemental information regarding the Company’s capital strength and operating performance. These non-GAAP financial measures should not be considered in isolation or as substitutes for their most directly comparable GAAP measures. Reconciliations of these non-GAAP financial measures to the most directly comparable GAAP measures are set forth below.

Tangible Common Equity / Tangible Assets

Efficiency Ratio

Exhibit 99.2

Southern First Bancshares, Inc. Announces Public Offering of Common Stock

Greenville, South Carolina, April 15, 2026 – Southern First Bancshares, Inc. (NASDAQ: SFST) (the “Company,” “we,” “us,” or “our”) today announced that it has launched an underwritten public offering of shares of its common stock. The Company intends to grant the underwriters a 30-day option to purchase up to an additional 15 percent of the shares of common stock sold in connection with the offering. The Company intends to use the net proceeds of the offering for general corporate purposes, which may include, among other things, supporting organic growth initiatives, providing capital to our bank subsidiary, redeeming or repurchasing outstanding indebtedness, including subordinated debt, and for working capital purposes.

Piper Sandler & Co. is serving as the sole book-running manager for the offering. Keefe, Bruyette & Woods, A Stifel Company, is serving as co-manager.

This announcement is for informational purposes only and shall not constitute an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of these securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of such jurisdiction. The Company has filed a shelf registration statement (File No. 333-293279), including a base prospectus, and a preliminary prospectus supplement with the Securities and Exchange Commission (“SEC”) relating to the offering, and expects to file a prospectus supplement relating to the offering. The offering is being made only by means of the prospectus supplement and accompanying base prospectus. Before you invest, you should read the prospectus in the registration statement, the preliminary prospectus supplement, the prospectus supplement when available, and other documents the Company has filed with the SEC for more complete information about the Company and this offering. You may get these documents for free by visiting EDGAR on the SEC website at www.sec.gov or, alternatively, copies of the preliminary prospectus supplement and the accompanying base prospectus relating to the offering, and the prospectus supplement when available, may be obtained by contacting Piper Sandler & Co., Attn: Prospectus Department, by Telephone: (800) 747-3924 or Email: [email protected] or Keefe, Bruyette & Woods, Inc., Attn: Equity Capital Markets, by Telephone: (800) 966-1559 or Email: [email protected].

ABOUT SOUTHERN FIRST BANCSHARES, INC.

Southern First Bancshares, Inc., Greenville, South Carolina, is a registered bank holding company incorporated under the laws of South Carolina. The Company’s wholly owned subsidiary, Southern First Bank, is the second largest bank headquartered in South Carolina. Southern First Bank has been providing financial services since 1999 and now operates in 12 locations in the Greenville, Columbia, and Charleston markets of South Carolina as well as the Charlotte, Triangle and Triad regions of North Carolina and Atlanta, Georgia. Southern First Bancshares has consolidated assets of approximately $4.4 billion and its common stock is traded on The NASDAQ Global Market under the symbol “SFST.”

FORWARD-LOOKING STATEMENTS

Certain statements in this news release contain “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, such as statements relating to the completion, timing and expected size of the offering, the anticipated closing date of the offering, the anticipated use of proceeds from the offering, future plans and expectations, and are thus prospective. Such forward-looking statements are identified by words such as “believe,” “expect,” “anticipate,” “estimate,” “preliminary”, “intend,” “plan,” “target,” “continue,” “lasting,” and “project,” as well as similar expressions. Such statements are subject to risks, uncertainties, and other factors which could cause actual results to differ materially from future results expressed or implied by such forward-looking

statements. Although we believe that the assumptions underlying the forward-looking statements are reasonable, any of the assumptions could prove to be inaccurate. Therefore, we can give no assurance that the results contemplated in the forward-looking statements will be realized. The inclusion of forward-looking information should not be construed as a representation by the Company or any other person that the future events, plans or expectations described herein will be achieved.

The following factors, among others, could cause actual results to differ materially from the anticipated results or other expectations expressed in the forward-looking statements: (1) competitive pressures among depository and other financial institutions may increase significantly and have an effect on pricing, spending, third-party relationships and revenues; (2) the strength of the United States economy in general and the strength of the local economies in which the Company conducts operations may be different than expected; (3) the rate of delinquencies and amounts of charge-offs, the level of allowance for credit loss, the rates of loan and deposit growth as well as pricing of each product, or adverse changes in asset quality in our loan portfolio, which may result in increased credit risk-related losses and expenses; (4) changes in legislation, regulation, policies or administrative practices, whether by judicial, governmental or legislative action, including, but not limited to, changes affecting oversight of the financial services industry or consumer protection, the regulatory landscape or capital market; (5) adverse conditions in the stock market, the public debt market and other capital markets (including changes in interest rate conditions) could continue to have a negative impact on the Company, including the timing, size, pricing or completion of the offering; (6) changes in interest rates, which may continue to affect the Company’s net income, interest expense, prepayment penalty income, mortgage banking income, and other future cash flows, or the market value of the Company’s assets, including its investment securities; (7) trade wars, government shutdowns, or a potential recession which may cause adverse risk to the overall economy, and could indirectly pose challenges to our clients and to our business; (8) any increase in FDIC assessments which have increased and may continue to increase our cost of doing business; and (9) changes in accounting principles, policies, practices, or guidelines. Additional factors that could cause our results to differ materially from those described in the forward-looking statements can be found in our reports (such as Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q and Current Reports on Form 8-K) filed with the SEC and available at the SEC’s Internet site (www.sec.gov). All subsequent written and oral forward-looking statements concerning the Company or any person acting on its behalf are expressly qualified in their entirety by the cautionary statements above. We do not undertake any obligation to update any forward-looking statement to reflect circumstances or events that occur after the date the forward-looking statements are made, except as required by law.

MEDIA CONTACT:

ART SEAVER 864-679-9010

FINANCIAL CONTACT:

CHRIS ZYCH 864-679-9070

WEB SITE: www.southernfirst.com

SOURCE: Southern First Bancshares, Inc.