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For Immediate Release Exhibit 99.1 Investar Holding Corporation Announces 2021 Third Quarter Results BATON ROUGE , LA / ACCESSWIRE / October 21 , 2021 / Investar Holding Corporation ( " Investar ” ) ( NASDAQ : ISTR ) , the holding company for Investar Bank , National Association ( the " Bank ” ) , today announced financial results for the quarter ended September 30 , 2021. Investar reported a net loss of $ 10.0 million , or $ 0.95 per diluted common share , for the third quarter of 2021 , compared to net income of $ 5.7 million , or $ 0.53 per diluted common share , for the quarter ended June 30 , 2021 , and net income of $ 4.5 million , or $ 0.41 per diluted common share , for the quarter ended September 30 , 2020. As previously reported , Investar's third quarter results reflect a large impairment charge recorded as a result of Hurricane Ida , discussed in more detail below under Credit Quality . On a non - GAAP basis , core ( loss ) earnings per diluted common share for the third quarter of 2021 were ( $ 1.06 ) compared to $ 0.53 for the first quarter of 2021 and $ 0.35 for the third quarter of 2020. Core ( loss ) earnings exclude certain non - operating items including , but not limited to , gain on sale of investment securities , change in the fair value of equity securities , and acquisition expense ( refer to the Reconciliation of Non - GAAP Financial Measures tables for a reconciliation of GAAP to non - GAAP metrics ) . Investar Holding Corporation President and Chief Executive Officer John D'Angelo said : " Our prayers go out to those families and businesses affected by Hurricane Ida , which hit south Louisiana as a category 4 hurricane on August 29. While none of our branches were significantly affected by the storm , some of our customers , employees , and their extended families were greatly impacted . As a member of the affected communities , we have set up programs to help employees and customers experiencing financial difficulty as a result of the hurricane . We will continue to assist our communities as they rebuild . Unfortunately , our results for the quarter were adversely impacted by the storm that devastated some of our market areas . We recorded an impairment charge of $ 21.6 million which negatively affected our earnings and performance ratios . However , the Holding Corporation and Bank remain well - capitalized . " Third Quarter Highlights • Cost of deposits decreased eight basis points to 0.43 % for the quarter ended September 30 , 2021 compared to 0.51 % for the quarter ended June 30 , 2021 and decreased 54 basis points compared to 0.97 % for the quarter ended September 30 , 2020. Our overall cost of funds decreased seven and 53 basis points to 0.63 % for the quarter ended September 30 , 2021 compared to 0.70 % and 1.16 % for the quarters ended June 30 , 2021 and September 30 , 2020 , respectively .