Gastroschisis

Message from the CEO Our Phase-III study, the largest of its kind ever conducted, is progressing across 88 hospitals in ten countries. We have now recruited 85% of the patients (1824 out of the planned 2158), and with the current rate of approximately 75 patients per month, we anticipate completing the recruitment by the end of the year. In June, the Data Monitoring Committee (DMC) concluded its scheduled safety analysis of data from the first 1400 recruited patients. The DMC's conclusion is that the study can proceed as planned without any reservations. The DMC also conducted a futility analysis to determine if the trial has the potential to achieve statistically significant results, and once again, the conclusion was that the clinical work can continue as scheduled. No further DMC reviews are planned, and we are now approaching the conclusion of our extensive study. In the study, children are divided into two groups. In one group, the children receive a placebo, a treatment intended to have no effect on the patient. In the other group, the children receive IBP-9414. Both the effectiveness and safety-related observations are then compared between the two groups. IBT has, as is customary in pharmaceutical studies, reached agreements with both the FDA (the U.S. pharmaceutical authority) and the EMA (its European counterpart) that no comparisons should be made before the study is concluded. Therefore, the study has been intentionally designed so that, at this point, observations from the study cannot be attributed to a specific treatment group. However, what we can do in the present time is analyze data from a "total" perspective. During the spring, we have analyzed the amount of food the children receive. We have been able to identify several clinical factors that influence the amount of food the children receive. Our findings have been accepted for publication in the American Journal of Perinatology. One of the efficacy endpoints (one of two primary endpoints) examines how IBP-9414 improves Sustained Feeding Tolerance (SFT). The amount of food administered by the doctors to the children is one of three factors included in the SFT endpoint. The other two factors are whether the children receive intravenous feeding and how the children gain weight. The publication in the American Journal of Perinatology serves as confirmation that we have appropriately designed our Phase III study. We are pleased that the European Patent Office has approved IBT's application covering Lactobacillus reuteri. This patent enhances IBT's exclusivity in the critical European market until 2036. Our product portfolio initiatives continue to progress. IBT has been granted orphan drug status for our Gastroschisis program, IBT-1016. This marks the first instance in which a developmental program has received orphan drug designation for the treatment of Gastroschisis in the United States. IBT decided at an extraordinary general meeting to conduct a rights issue to prepare for the launch of IBP-9414 and to initiate the development work of one or more of the other IBT portfolio projects. In July, IBT announced that the issuance was oversubscribed, raising approximately 100 million SEK before issuance costs, which is certainly gratifying. Finally, I want to express my deep gratitude to IBT's colleagues for all contributions during the first half of the year. It is truly remarkable what you have achieved. Now, we have the goal within reach. Stockholm, August 24th, 2023 Staffan Strömberg, CEO Financial overview for the period Second quarter (Apr-Jun) 2023 Net sales KSEK 0 (0) Operating income KSEK -30 952* (1 758)Earnings per share before and after dilution SEK -2.57 (0.15) Reporting period (Jan-Jun) 2023 Net sales KSEK 0 (0) Operating income KSEK -55 247* (-17 305)Earnings per share before and after dilution SEK -4.57 (-1.56) * Operational income includes exchange rate effects on foreign currency deposits for the purpose of securing future outflows during the second quarter amounting to KSEK 8 412 (19 979) and during the reporting period amounting to KSEK 7 760 (26 231) Significant events during the second quarter (Apr-Jun) On May 16, 2023, IBT decided on a rights issue and called for an extraordinary general meeting of shareholders.On June 9, 2023, the Extraordinary General Meeting resolved to approve the Board's decision to increase the share capital by issuing new shares with pre-emptive rights for the company's shareholders.On June 15, 2023 IBT announced that the European Patent Office has approved its patent application for Lactobacillus reuteri. The patent covers the drug candidate IBP-9414On June 21, 2023, it was announced that the Data Monitoring Committee (DMC) conducted a planned safety analysis, without objections. At the same time, a planned futility analysis was also conducted and was positive, which means that IBT is continuing the study as planned. Significant events during the reporting period (Jan-Jun) On January 12, 2023, it was announced that IBT acquired a probiotic pharmaceutical platform that can prevent antibiotic-resistant hospital infections.In January 2023, IBT published new results in the British Journal of Gastroenterology validating Sustained Feeding Tolerance (SFT) as a relevant primary endpoint in “The Connection Study”.In March 2023, IBT announced that the last cohort would open for recruitment. This third cohort will include infants with a birth weight between 1001 grams and 1500 grams. Significant events after the reporting period On July 3, 2023, IBT announced that the product IBP-1016 for gastroschisis had been granted orphan drug status.On July 4, 2023, IBT announced the outcome of the rights issue. The issue provided IBT with approximately SEK 101 million before deduction of transaction costs. After the rights issue, the number of shares and votes in the company changed. The new number of shares now amounts to 13,471,420, of which 453,283 A-shares and 13,018,137 B-shares. Selected financial data 000´s20232022202320222022 Apr-JunApr-JunJan-JunJan-JunJan-DecNet Sales-----Other income--13312Operating profit / loss-30 9521 758-55 247-17 305-65 808Result after tax-28 8201 648-51 288-17 553-65 451Total assets317 390400 007317 390400 007349 619Cash flow for the period-14 138-28 182-42 647-39 007-83 911Cash flow per share for the period (SEK)-1.26-2.51-3.80-3.47-7.47Cash 300 953373 976300 953373 976335 840Earnings per share before and after dilution (SEK)-2.570.15-4.57-1.56-5.83Equity per share (SEK)25.0233.8125.0233.8129.55Equity ratio (%)89%95%89%95%95% IBT in brief Infant Bacterial Therapeutics AB (“IBT”) is a public company domiciled in Stockholm. Thecompany’s Class B shares are since September 10, 2018, listed on Nasdaq Stockholm (IBTB). IBT is a pharmaceutical company whose purpose is to develop and market drugs targetingdiseases affecting prematurely born infants or caused by antibiotic-resistant bacteria. IBT’s main focus is on its drug candidate IBP-9414, whose development program is designedto demonstrate a reduced incidence of necrotizing enterocolitis (NEC) and whetherprematurely born infants achieve improved sustained feeding tolerance (SFT) when treatedwith the active substance Lactobacillus reuteri, a bacterial strain naturally found in humanbreast milk. IBP-9414 is currently in an ongoing registration-enabling the pivotal Phase III studyand is the company’s most advanced development project. The portfolio also includes drug candidates, IBP-1016, IBP-1118, and IBP-1122. IBP-1016 isfor the treatment of gastroschisis, a life-threatening and rare condition where the child is bornwith externalized abdominal organs. IBP-1118 aims to prevent ROP (retinopathy ofprematurity), a leading cause of blindness in premature infants, while IBP-1122 aims toeliminate vancomycin-resistant enterococci (VRE), which cause antibiotic-resistant hospitalacquired infections. By developing these drugs, IBT has the opportunity to address medical needs where noavailable treatments currently exist. Publication The Report was submitted for publication, by the CEO, at 08.30 on August 25, 2023. Contact person Staffan Strömberg, CEO Maria Ekdahl, CFO Contact information Infant Bacterial Therapeutics AB (Reg. no. 556873-8586)Bryggargatan 10 111 21 Stockholm, Sweden Telephone: +46 76 219 37 38info@ibtherapeutics.com www.ibtherapeutics.com Attachment IBTQ2 2023 ENG

The number of shares and votes in Infant Bacterial Therapeutics AB (publ) has changed due to the recently completed rights issue (for further information, see the company’s press release on 4 July 2023). Through the rights issue, the number of shares in IBT increased with 2,245,236 (of which 75,547 class A shares and 2,169,689 class B shares) and the number of votes increased with 2,925,159. Today, on the last trading day of the month, there are in total 13,471,420 shares (of which 453,283 class A shares and 13,018,137 class B shares) and 17,550,967 votes in IBT. About Infant Bacterial Therapeutics AB Infant Bacterial Therapeutics AB (“IBT”) is a public company domiciled in Stockholm. The company’s Class B shares are since September 10, 2018, listed on Nasdaq Stockholm (IBT B). IBT is a pharmaceutical company whose purpose is to develop and market drugs targeting diseases affecting prematurely born infants or caused by antibiotic-resistant bacteria.IBT’s main focus is on its drug candidate IBP-9414, whose development program is designed to demonstrate a reduced incidence of necrotizing enterocolitis (NEC) and whether prematurely born infants achieve improved sustained feeding tolerance (SFT) when treated with the active substance Lactobacillus reuteri, a bacterial strain naturally found in human breast milk. IBP-9414 is currently in an ongoing registration-enabling pivotal Phase III study and is the company’s most advanced development project. The portfolio also includes drug candidates, IBP-1016, IBP-1118, and IBP-1122. IBP-1016 is for the treatment of gastroschisis, a life-threatening and rare condition where the child is born with externalized abdominal organs. IBP-1118 aims to prevent ROP (retinopathy of prematurity), a leading cause of blindness in premature infants, while IBP-1122 aims to eliminate vancomycin-resistant enterococci (VRE), which cause antibiotic-resistant hospital acquired infections. By developing these drugs, IBT has the opportunity to address medical needs where no available treatments currently exist. Publication This is information that Infant Bacterial Therapeutics AB (publ) is obliged to make public pursuant to the Swedish Financial Instruments Trading Act. The information was submitted for publication, through the agency of the contact person set out above, on 31 July 2023, at 10:00 CEST. For additional information please contactStaffan Strömberg, CEOInfant Bacterial Therapeutics ABBryggargatan 10111 21 StockholmPhone: +46 76 219 3738info@ibtherapeutics.comwww.ibtherapeutics.com Attachment PR ENG New number shares and votes

The FDA has granted orphan drug designation for IBT’s product IBP-1016 for gastroschisis. Infants suffering from gastroschisis suffer from risks of growth retardation, sepsis and NEC which leads to increased mortality. Hospital stays for these infants are commonly long and costly. Orphan drugs are either drugs or biologics intended for the treatment, diagnosis or prevention of rare diseases or disorders affecting less than 200 000 patients in the USA per year. An orphan drug designation qualifies the company applying for it to receive certain benefits from the US government, such as tax reductions and long term market exclusivity, in exchange for developing the drug. The approval does not change the standard regulatory requirements and processes for obtaining marketing approval for a product. Consequently, all aspects of the development must be investigated, including the clinical safety and efficacy documentation required for a market authorisation. “This is the first time the FDA has granted orphan drug designation for gastroschisis. This is important as there are no treatments available for this serious disease. We are now investigating the optimum development pathway to obtain market authorization”, says Staffan Strömberg, Chief Executive Officer, IBT. About Infant Bacterial Therapeutics AB Infant Bacterial Therapeutics AB (“IBT”) is a public company domiciled in Stockholm. The company’s Class B shares are since September 10, 2018, listed on Nasdaq Stockholm (IBT B). IBT is a pharmaceutical company whose purpose is to develop and market drugs targeting diseases affecting prematurely born infants or caused by antibiotic-resistant bacteria. IBT’s main focus is on its drug candidate IBP-9414, whose development program is designed to demonstrate a reduced incidence of necrotizing enterocolitis (NEC) and whether prematurely born infants achieve improved sustained feeding tolerance (SFT) when treated with the active substance Lactobacillus reuteri, a bacterial strain naturally found in human breast milk. IBP-9414 is currently in an ongoing registration-enabling pivotal Phase III study and is the company’s most advanced development project. The portfolio includes drug candidates, IBP-1016, IBP-1118, and IBP-1122. IBP-1016 is for the treatment of gastroschisis, a life-threatening and rare condition where the child is born with externalized abdominal organs. IBP-1118 aims to prevent ROP (retinopathy of prematurity), a leading cause of blindness in premature infants, while IBP-1122 aims to eliminate vancomycin-resistant enterococci (VRE), which cause antibiotic-resistant hospital acquired infections. By developing these drugs, IBT has the opportunity to address medical needs where no available treatments currently exist. The content above comes from the network. if any infringement, please contact us to modify.