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STATES\n\nSECURITIES AND EXCHANGE COMMISSION\n\nWashington, D.C. 20549\n\n \n\nForm 10-Q\n\n \n\n☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934\n\n \n\nFor the quarterly period ended March 31, 2026\n\nor\n\n☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT\n\nFor the transition period from __________ to __________\n\nCommission File Number: 001-37621\n\nFIRST GUARANTY BANCSHARES, INC.\n\n(Exact name of registrant as specified in its charter)\n\n \n\nLouisiana26-0513559\n\n(State or other jurisdiction incorporation or organization)(I.R.S. Employer Identification Number)\n\n  \n\n400 East Thomas Street \n\nHammond,Louisiana70401\n\n(Address of principal executive offices)(Zip Code)\n\n  \n\n(985)345-7685\n\n(Registrant's telephone number, including area code)\n\n \n\nSecurities registered pursuant to Section 12(b) of the Act:\n\nTitle of each classTrading Symbol(s)Name of each exchange on which registered\n\nCommon Stock, $1 par valueFGBIThe Nasdaq Stock Market LLC\n\nDepository Shares (each representing a 1/40th interest in a share of 6.75% Series A Fixed-Rate Non-Cumulative perpetual preferred stock)FGBIPThe Nasdaq Stock Market LLC\n\nIndicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.\n\nYes ☒ No ☐\n\n \n\nIndicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).\n\nYes ☒ No ☐\n\nIndicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of \"large accelerated filers,\" \"accelerated filers,\" \"smaller reporting company,\" and \"emerging growth company\" in Rule 12b-2 of the Exchange Act.\n\nLarge accelerated filer ☐     Accelerated filer ☐    Non-accelerated filer ☒\n\nSmaller reporting company ☒\n\nEmerging growth company ☐\n\nIf 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.   ☐\n\n \n\nIndicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).\n\nYes ☐ No ☒\n\nAs of May 12, 2026 the registrant had 16,464,248 shares of $1 par value common stock outstanding.\n\nTable of Contents\n\n  Page\n\n[Part I.](#i2372cf0cb9a445ee9b91db39aa1599ea_10)\n\n[Financial Information](#i2372cf0cb9a445ee9b91db39aa1599ea_10)\n\n [4](#i2372cf0cb9a445ee9b91db39aa1599ea_10)\n\n   \n\n[Item 1.](#i2372cf0cb9a445ee9b91db39aa1599ea_13)\n\n[Financial Statements (unaudited)](#i2372cf0cb9a445ee9b91db39aa1599ea_13)\n\n[4](#i2372cf0cb9a445ee9b91db39aa1599ea_13)\n\n   \n\n \n[Consolidated Balance Sheets](#i2372cf0cb9a445ee9b91db39aa1599ea_16)\n\n[4](#i2372cf0cb9a445ee9b91db39aa1599ea_16)\n\n   \n\n \n[Consolidated Statements of Income](#i2372cf0cb9a445ee9b91db39aa1599ea_22)\n\n[5](#i2372cf0cb9a445ee9b91db39aa1599ea_22)\n\n   \n\n \n[Consolidated Statements of Comprehensive Income](#i2372cf0cb9a445ee9b91db39aa1599ea_25)\n\n[6](#i2372cf0cb9a445ee9b91db39aa1599ea_25)\n\n \n[Consolidated Statements of Shareholders' Equity](#i2372cf0cb9a445ee9b91db39aa1599ea_28)\n\n[7](#i2372cf0cb9a445ee9b91db39aa1599ea_28)\n\n   \n\n \n[Consolidated Statements of Cash Flows](#i2372cf0cb9a445ee9b91db39aa1599ea_31)\n\n[8](#i2372cf0cb9a445ee9b91db39aa1599ea_31)\n\n   \n\n \n[Notes to Unaudited Consolidated Financial Statements](#i2372cf0cb9a445ee9b91db39aa1599ea_34)\n\n[9](#i2372cf0cb9a445ee9b91db39aa1599ea_34)\n\n   \n\n[Item 2.](#i2372cf0cb9a445ee9b91db39aa1599ea_79)\n\n[Management's Discussion and Analysis of Financial Condition and Results of Operations](#i2372cf0cb9a445ee9b91db39aa1599ea_79)\n\n[33](#i2372cf0cb9a445ee9b91db39aa1599ea_79)\n\n   \n\n[Item 3.](#i2372cf0cb9a445ee9b91db39aa1599ea_91)\n\n[Quantitative and Qualitative Disclosures About Market Risk](#i2372cf0cb9a445ee9b91db39aa1599ea_91)\n\n[53](#i2372cf0cb9a445ee9b91db39aa1599ea_91)\n\n   \n\n[Item 4.](#i2372cf0cb9a445ee9b91db39aa1599ea_94)\n\n[Controls and Procedures](#i2372cf0cb9a445ee9b91db39aa1599ea_94)\n\n[56](#i2372cf0cb9a445ee9b91db39aa1599ea_94)\n\n   \n\n[Part II.](#i2372cf0cb9a445ee9b91db39aa1599ea_97)\n\n[Other Information](#i2372cf0cb9a445ee9b91db39aa1599ea_97)\n\n[57](#i2372cf0cb9a445ee9b91db39aa1599ea_97)\n\n   \n\n[Item 1.](#i2372cf0cb9a445ee9b91db39aa1599ea_100)\n\n[Legal Proceedings](#i2372cf0cb9a445ee9b91db39aa1599ea_100)\n\n[57](#i2372cf0cb9a445ee9b91db39aa1599ea_100)\n\n   \n\n[Item 1A.](#i2372cf0cb9a445ee9b91db39aa1599ea_103)\n\n[Risk Factors](#i2372cf0cb9a445ee9b91db39aa1599ea_103)\n\n[57](#i2372cf0cb9a445ee9b91db39aa1599ea_103)\n\n   \n\n[Item 2.](#i2372cf0cb9a445ee9b91db39aa1599ea_103)\n\n[Unregistered Sales of Equity Securities and Use of Proceeds](#i2372cf0cb9a445ee9b91db39aa1599ea_103)\n\n[57](#i2372cf0cb9a445ee9b91db39aa1599ea_103)\n\n[Item 3.](#i2372cf0cb9a445ee9b91db39aa1599ea_103)\n\n[Defaults Upon Senior Securities](#i2372cf0cb9a445ee9b91db39aa1599ea_103)\n\n[57](#i2372cf0cb9a445ee9b91db39aa1599ea_103)\n\n[Item 4.](#i2372cf0cb9a445ee9b91db39aa1599ea_103)\n\n[Mine Safety Disclosures](#i2372cf0cb9a445ee9b91db39aa1599ea_103)\n\n[57](#i2372cf0cb9a445ee9b91db39aa1599ea_103)\n\n[Item 5.](#i2372cf0cb9a445ee9b91db39aa1599ea_103)\n\n[Other Information](#i2372cf0cb9a445ee9b91db39aa1599ea_103)\n\n[57](#i2372cf0cb9a445ee9b91db39aa1599ea_103)\n\n[Item 6.](#i2372cf0cb9a445ee9b91db39aa1599ea_106)\n\n[Exhibits](#i2372cf0cb9a445ee9b91db39aa1599ea_106)\n\n[58](#i2372cf0cb9a445ee9b91db39aa1599ea_106)\n\n  \n\n[Signatures](#i2372cf0cb9a445ee9b91db39aa1599ea_109)\n\n[60](#i2372cf0cb9a445ee9b91db39aa1599ea_109)\n\n-3-\n\nPART I. FINANCIAL INFORMATION"}