Announcement • Jun 16

Acurx Pharmaceuticals, Inc. Announces Presentation Of Results From Leiden University Medical Center Public-Private Partnership For Its DNA Pol IIIC Inhibitors At The Leiden Early Drug Discovery & Development Scientific Conference

Acurx Pharmaceuticals, Inc. announced that a presentation was given by Mia Urem, PhD, from Leiden University Medical Center in the Netherlands entitled: "A unique inhibitor conformation selectively targets Gram+ Bacterial DNA Replication" at the Leiden Early Drug Discovery & Development Scientific Conference on June 11, 2026. Results are from Acurx's ongoing scientific collaboration with Leiden University Medical Center partially under a grant from Health Holland to further study the mechanism of action of DNA pol IIIC inhibitors. LUMC highlighted Acurx's new class of promising antimicrobials, ibezapolstat and related analogues specifically target Gram-positive bacteria. High-resolution cryo-electron microscopy resolved the structure of ibezapolstat in relationship to the binding pocket of a Gram-positive DNA pol IIIC to the level of 3.2Å. The Company's preclinical pipeline includes development of an oral product candidate for treatment of ABSSSI (Acute Bacterial Skin and Skin Structure Infections), with a development program for post-exposure prophylaxis of inhalation anthrax being planned in parallel. Ibezapolstat has previously been granted FDA QIDP and Fast-Track Designations and has received SME (Small and Medium-sized Enterprise) designation by the EMA. Dr. Urem's group utilized high-resolution cryo-electron microscopy to resolve the structure of ibezapolstat in relationship to the binding pocket of a Gram-positive DNA pol IIIC to the level of 3.2Å. The active site of the polymerase is conserved in >220 Gram-positive species, indicating potential for broad clinical utility of this bactericidal inhibitory mechanism of action of Acurx compounds. The distinctive non-planar conformation of IBZ and chemically related molecules, together with high conservation of the binding pocket in DNA pol IIIC, suggests that this is a general mechanism for this class of inhibitor and that a wide range of Gram-positive infections, including those caused by high-priority pathogenic Gram-positive bacteria, may be susceptible to treatment with Acurx pipeline antibiotics. Acurx's R&D pipeline includes antibiotic product candidates that target Gram-positive bacteria, including Clostridioides difficile, methicillin-resistant Staphylococcus aureus (MRSA), vancomycin resistant Enterococcus (VRE), drug-resistant Streptococcus pneumoniae (DRSP) and B. anthracis (anthrax; a Bioterrorism Category A Threat-Level pathogen). The Company's preclinical pipeline includes development of an oral product candidate for treatment of ABSSSI (Acute Bacterial Skin and Skin Structure Infections), upon which a development program for treatment of inhaled anthrax is being planned in parallel. The presentation is posted on the Acurx website. Ibezapolstat is the Company's lead antibiotic candidate planning to advance to international Phase 3 clinical trials to treat patients with C. difficile infection. Ibezapolstat is a novel, orally administered antibiotic, being developed as a Gram-Positive Selective Spectrum (GPSS®) antibacterial. It is the first of a new class of DNA polymerase IIIC inhibitors under development by Acurx to treat bacterial infections. Ibezapolstat's unique spectrum of activity, which includes C. difficile but spares other Firmicutes and the important Actinobacteria phyla, appears to contribute to the maintenance of a healthy gut microbiome. In June 2018, ibezapolstat was designated by the U.S. Food and Drug Administration as a Qualified Infectious Disease Product for the treatment of patients with CDI and will be eligible to benefit from the incentives for the development of new antibiotics established under the Generating New Antibiotic Incentives Now Act. In 2019, FDA granted "Fast Track" designation to ibezapolstat for the treatment of patients with CDI. The CDC has designated C. difficile as an urgent threat highlighting the need for new antibiotics to treat CDI. The information package submitted to EMA by the Company to which agreement has been reached with EMA included details on Acurx's two planned international Phase 3 clinical trials, 1:1 randomized (designed as non-inferiority vs vancomycin), primary and secondary endpoints, sample size, statistical analysis plan and the overall registration safety database. The primary efficacy analysis will be performed using a Modified Intent-To-Treat population. This will result in an estimated 450 subjects in the Modified Intent-To-Treat population, randomized in a 1:1 ratio to either ibezapolstat or standard-of-care vancomycin, enrolled into the initial Phase 3 trial. The trial design not only allows determination of ibezapolstat's ability to achieve Clinical Cure of CDI as measured 2 days after 10 days of oral treatment but also includes assessment of ibezapolstat's potential effect on reduction of CDI recurrence in the target population. In the event non-inferiority of ibezapolstat to vancomycin is demonstrated, further analysis will be conducted to test for superiority. Ibezapolstat, an inhibitor of the replicative DNA polymerase pol IIIC from Gram-positive bacteria identified by screening library of dGTP analogues, has shown promising results for the treatment of Clostridioides difficile Infection in a recent Phase 2a clinical trial, but the molecular basis of selective inhibition is not fully characterized as no structural information is available on pol IIIC proteins from pathogens. Ongoing research project will determine the structure of pol IIIC from the multidrug-resistant organisms methicillin resistant Staphylococcus aureus (MRSA), vancomycin resistant Enterococci (VRE) and/or penicillin resistant Streptococcus pneumoniae (PRSP) in the absence and presence of lead compounds. These results will reveal the structural space of inhibitor-binding and guide the rational design of inhibitors with optimal pharmacological properties and organism-specificity that will be demonstrated by in vitro polymerase inhibition assays and in vivo minimal inhibitory concentration determination. The presented research was performed in part as a public-private partnership that includes the Dutch Top Sector Life Sciences and Health and is represented by Stichting Life Sciences Health – TKI (aka, Health~Holland). This foundation is tasked by the Dutch government to promote and stimulate public-private partnerships to undertake R&D projects in the life sciences. To promote such partnerships, the Minister of Economic Affairs and Climate Policy has allocated certain funds to Stichting LSH-TKI, to grant allowances to projects under the TKI-programme Life Sciences & Health. Stichting LSH-TKI has designated the Board of Directors of LUMC as delegated grantor for the PPP allowance allocated to the LUMC.

Announcement • May 16

Acurx Announces Successful FDA End-of-Phase 2 Meeting and Phase 3 Readiness for Ibezapolstat in the Treatment of C. difficile Infection

Acurx Pharmaceuticals, Inc. announced the successful outcome of an End-of-Phase 2 meeting with the U.S. Food and Drug Administration (FDA), supporting the advancement of ibezapolstat for the treatment of C. difficile Infection into Phase 3 studies based on the recently completed Phase 2 clinical trial results. Key elements for the two Phase 3, non-inferiority, pivotal trials were confirmed and included agreement on the protocol design, patient population, primary and secondary endpoints, and size of the registration safety database. Based on FDA recommendations, and in anticipation of an EMA Scientific Advice Meeting, the primary efficacy analysis will be performed using a Modified Intent-To-Treat (mITT) population consistent with EMA requirements. This will result in an estimated 450 subjects in the mITT population, randomized in a 1:1 ratio to either ibezapolstat or standard-of-care vancomycin, enrolled into the initial Phase 3 trial. The trial design not only allows determination of ibezapolstat's ability to achieve Clinical Cure of CDI as measured 2 days after 10 days of oral treatment, but also includes assessment of ibezapolstat's potential effect on reduction of CDI recurrence in the target population. In the event non-inferiority of ibezapolstat to vancomycin is demonstrated, further analysis will be conducted to test for superiority. The completed multicenter, open-label single-arm segment (Phase 2a) study was followed by a double-blind, randomized, active-controlled, non-inferiority, segment (Phase 2b) at 28 US clinical trial sites which together comprise the Phase 2 clinical trial. This Phase 2 clinical trial was designed to evaluate the clinical efficacy of ibezapolstat in the treatment of CDI including pharmacokinetics and microbiome changes from baseline and continue to test for anti-recurrence microbiome properties seen in the Phase 2a trial, including the treatment- related changes in alpha diversity and bacterial abundance and effects on bile acid metabolism. The completed Phase 2a segment of this trial was an open label cohort of up to 20 subjects from study centers in the United States. In this cohort, 10 patients with diarrhea caused by C. difficile were treated with ibezapolstat 450 mg orally, twice daily for 10 days. All patients were followed for recurrence for 28± 2 days. Per protocol, after 10 patients of the projected 20 Phase 2a patients completed treatment (100% cured infection at End of Treatment), the Trial Oversight Committee assessed the safety and tolerability and made its recommendation regarding early termination of the Phase 2a study and advancement to the Ph2b segment. The Company's Scientific Advisory Board concurred with this recommendation. In the now completed Phase 2b trial segment, 32 patients with CDI were enrolled and randomized in a 1:1 ratio to either ibezapolstat 450 mg every 12 hours or vancomycin 125 mg orally every 6 hours, in each case, for 10 days and followed for 28 ± 2 days following the end of treatment for recurrence of CDI. The two treatments were identical in appearance, dosing times, and number of capsules administered to maintain the blind. The Company previously reported that the overall observed Clinical Cure rate in the combined Phase 2 trials in patients with CDI was 96% (25 out of 26 patients), based on 10 out of 10 patients (100%) in Phase 2a in the Modified Intent to Treat Population, plus 15 out of 16 (94%) patients in Phase 2b in the Per Protocol Population, who experienced Clinical Cure during treatment with ibezapolstat. Ibezapolstat was well-tolerated, with three patients each experiencing one mild adverse event assessed by the blinded investigator to be drug-related. All three events were gastrointestinal in nature and resolved without treatment. There were no drug-related treatment withdrawals or no drug-related serious adverse events, or other safety findings of concern. In the Phase 2b vancomycin control arm, 14 out of 14 patients experienced Clinical Cure. The Company is confident that based on the pooled Phase 2 ibezapolstat Clinical Cure rate of 96% and the historical vancomycin cure rate of approximately 81% (Vancocin® Prescribing Information, January 2021), we will demonstrate non-inferiority of ibezapolstat to vancomycin in Phase 3 trials in accordance with the applicable FDA Guidance for Industry (October 2022). The Phase 2b clinical trial segment was discontinued due to success. The Company made this decision in consultation with its medical and scientific advisors and statisticians based on observed aggregate blinded data and other factors, including the cost to maintain clinical trial sites and slow enrollment due to COVID-19 and its aftermath. The Company had determined that the trial performed as anticipated for both treatments, ibezapolstat and the control antibiotic vancomycin (a standard of care to treat patients with CDI), with high rates of clinical cure observed across the trial without any emerging safety concerns. Accordingly, an Independent Data Monitoring Committee was not required to perform an interim analysis of this Phase 2b trial data as originally planned. The Company anticipated that this decision would allow the Company to advance this first-in-class, FDA QIDP/Fast Track-designated antibiotic product candidate to Phase 3 clinical trials more expeditiously. The Phase 2b trial was originally designed to be a non-inferiority (NI) trial and later amended to include an interim efficacy analysis with review by an Independent Data Monitoring Committee (IDMC). The decision to end the trial early based on blinded clinical observations obviated the need for an interim analysis, IDMC review, and NI assessment. The Company determined, in consultation with its clinical and statistical experts, that presenting clinical cure rates for the primary efficacy endpoint is the most appropriate representation for the clinical activity of ibezapolstat in treating CDI. In the Phase 2 clinical trial, the Company will also evaluate pharmacokinetics (PK) and microbiome changes and test for anti-recurrence microbiome properties, including the change from baseline in alpha diversity and bacterial abundance, especially overgrowth of healthy gut microbiota Actinobacteria and Firmicute phylum species during and after therapy. Phase 2a data demonstrated complete eradication of colonic C. difficile by day three of treatment with ibezapolstat as well as the observed overgrowth of healthy gut microbiota, Actinobacteria and Firmicute phyla species, during and after therapy. Very importantly, emerging data show an increased concentration of secondary bile acids during and following ibezapolstat therapy which is known to correlate with colonization resistance against C. difficile. A decrease in primary bile acids and the favorable increase in the ratio of secondary-to-primary bile acids suggest that ibezapolstat may reduce the likelihood of CDI recurrence when compared to vancomycin.

Interest coverage ratio	n/a
Cash	US$9.25m
Equity	US$7.01m
Total liabilities	US$2.53m
Total assets	US$9.54m

Data	Last Updated (UTC time)
Company Analysis	2026/06/22 14:34
End of Day Share Price	2026/06/22 00:00
Earnings	2026/03/31
Annual Earnings	2025/12/31

Package	Data	Timeframe	Example US Source ^*
Company Financials	10 years	Income statement Cash flow statement Balance sheet	SEC Form 10-K SEC Form 10-Q
Analyst Consensus Estimates	+3 years	Forecast financials Analyst price targets	Analyst Research Reports Blue Matrix
Market Prices	30 years	Stock prices Dividends, Splits and Actions	ICE Market Data SEC Form S-1
Ownership	10 years	Top shareholders Insider trading	SEC Form 4 SEC Form 13D
Management	10 years	Leadership team Board of directors	SEC Form 10-K SEC Form DEF 14A
Key Developments	10 years	Company announcements	SEC Form 8-K

Analyst	Institution
James Molloy	Alliance Global Partners
Antonio Arce	H.C. Wainwright & Co.
Matthew Keller	H.C. Wainwright & Co.

Acurx Pharmaceuticals Balance Sheet Health

Financial Health criteria checks 6/6

Key information

Recent financial health updates

Acurx Pharmaceuticals Receives Non-Compliance Letter from Nasdaq Regarding Minimum Stockholders' Equity Requirement

Acurx Pharmaceuticals Receives Letter from Nasdaq Regarding Non-Compliance with Minimum Bid Price Requirement

Acurx Pharmaceuticals (NASDAQ:ACXP) Will Have To Spend Its Cash Wisely

Here's Why We're Not Too Worried About Acurx Pharmaceuticals' (NASDAQ:ACXP) Cash Burn Situation

Is Acurx Pharmaceuticals (NASDAQ:ACXP) In A Good Position To Invest In Growth?

Is Acurx Pharmaceuticals (NASDAQ:ACXP) In A Good Position To Deliver On Growth Plans?

Recent updates

Acurx Pharmaceuticals, Inc. Announces Presentation Of Results From Leiden University Medical Center Public-Private Partnership For Its DNA Pol IIIC Inhibitors At The Leiden Early Drug Discovery & Development Scientific Conference

New major risk - Revenue and earnings growth

New major risk - Revenue and earnings growth

Acurx Pharmaceuticals, Inc. Presents Scientific Poster on DNA Pol IIIC Inhibitors' Microbiome Evaluation at ESCMID Global

Acurx Pharmaceuticals, Inc. to Report Q1, 2026 Results on May 12, 2026

Acurx Pharmaceuticals, Inc. has filed a Follow-on Equity Offering in the amount of $2.499999 million.

Acurx Pharmaceuticals Inc Grants New Patent for Dna Polymerase Iiic Inhibitors

No longer forecast to breakeven

Acurx Pharmaceuticals Inc Announces New Ibezapolstat Clinical Trial Program In Patients With Recurrent CDI

New major risk - Revenue and earnings growth

Antibiotic Resistance Threats And Funding Risks Will Eventually Reward This Microbiome Sparing Platform

Acurx Pharmaceuticals, Inc. to Report Q4, 2025 Results on Mar 13, 2026

Forecast to breakeven in 2028

Acurx Pharmaceuticals, Inc. Announces Publication in the Nature Communications Scientific Journal Documenting its Unique Targeting of DNA Pol IIIC Gram-Positive Priority Pathogens

Acurx Pharmaceuticals, Inc. Announces New Data on Its DNA Pol IIIC Inhibitor Antibiotics Demonstrating A Potential Class Effect of Gut Microbiome Selectivity Presented At IDWeek 2025 Scientific Conference

Acurx Pharmaceuticals, Inc. to Report Q3, 2025 Results on Nov 12, 2025

Acurx Pharmaceuticals, Inc. Announces Positive Opinion from EMA on Pediatric Investigation Plan for Ibezapolstat Use in Children with C. Difficile Infection

New major risk - Market cap size

Acurx Pharmaceuticals, Inc. to Report Q2, 2025 Results on Aug 12, 2025

Acurx Pharmaceuticals, Inc. Announces Publication in Lancet Microbe of Phase 2B Clinical Trial Data for Ibezapolstat in Cdi

Acurx Pharmaceuticals, Inc., Annual General Meeting, Jul 17, 2025

Acurx Pharmaceuticals, Inc. announced that it expects to receive $12 million in funding from Lincoln Park Capital, LLC

Acurx Pharmaceuticals, Inc. to Report Q1, 2025 Results on May 13, 2025

Indian Patent Office Grants Acurx Pharmaceuticals, Inc. Patent for DNA Polymerase IIIC Inhibitors

Acurx Pharmaceuticals Receives Non-Compliance Letter from Nasdaq Regarding Minimum Stockholders' Equity Requirement

New major risk - Shareholder dilution

Price target decreased by 33% to US$7.52

New major risk - Market cap size

Acurx Pharmaceuticals, Inc. has filed a Follow-on Equity Offering in the amount of $1.098 million.

Acurx Pharmaceuticals, Inc. to Report Q4, 2024 Results on Mar 18, 2025

Acurx Pharmaceuticals Receives Letter from Nasdaq Regarding Non-Compliance with Minimum Bid Price Requirement

Jpo Grants Acurx Pharmaceuticals Patent in Japan for Dna Polymerase Iiic Inhibitors

New major risk - Share price stability

Acurx Pharmaceuticals, Inc. has completed a Follow-on Equity Offering in the amount of $2.500004 million.

Acurx Pharmaceuticals, Inc. has filed a Follow-on Equity Offering in the amount of $2.500004 million.

Acurx Pharmaceuticals, Inc. Updates Phase 3 Readiness for Ibezapolstat in C. Difficile Infection Based on Recent FDA and EMA Communications

New minor risk - Share price stability

New major risk - Revenue and earnings growth

Forecast to breakeven in 2026

Acurx Pharmaceuticals, Inc. to Report Q3, 2024 Results on Nov 13, 2024

Acurx Pharmaceuticals (NASDAQ:ACXP) Will Have To Spend Its Cash Wisely

New major risk - Revenue and earnings growth

Insufficient new directors

USPTO Grants Acurx Pharmaceuticals New Patent for Ibezapolstat to Treat CDI While Reducing Recurrence of Infection and Improving Health of the Gut Microbiome

Price target decreased by 10% to US$10.88

Acurx Pharmaceuticals, Inc. to Report Q2, 2024 Results on Aug 09, 2024

New major risk - Revenue and earnings growth

Acurx Pharmaceuticals, Inc. Announces Presentation of Ibezapolstat Phase 2 Clinical Trial Results for CDI at Scientific Conference

Forecast to breakeven in 2026

Acurx Announces Successful FDA End-of-Phase 2 Meeting and Phase 3 Readiness for Ibezapolstat in the Treatment of C. difficile Infection

Acurx Pharmaceuticals, Inc. Announces Presentation of Ibezapolstat Phase 2 Clinical Trial Results at ESCMID Global Scientific Conference

Acurx Pharmaceuticals, Inc., Annual General Meeting, Jun 17, 2024

Acurx Pharmaceuticals, Inc. to Report Q1, 2024 Results on May 15, 2024

Acurx Pharmaceuticals, Inc. has withdrawn its Follow-on Equity Offering.

Price target decreased by 7.2% to US$11.45

Acurx Pharmaceuticals, Inc. has filed a Follow-on Equity Offering.

New major risk - Financial position

Acurx Pharmaceuticals, Inc. to Report Q4, 2023 Results on Mar 18, 2024

Acurx Pharmaceuticals, Inc. Announces Positive Extended Clinical Cure Data for Ibezapolstat from Phase 2B Clinical Trial in Cdi Patients

Independent Director exercised options to buy US$75k worth of stock.

Acurx Sell-Off Presents Opportunity Before Upcoming Data Release

Acurx Announces Positive Comparative Microbiology and Microbiome Data for Ibezapolstat from Phase 2B Clinical Trial in CDI Patients

Co-Founder exercised options to buy US$77k worth of stock.

Acurx Pharmaceuticals, Inc. Announces Positive Phase 2B Results Showing 100% of Patients Who Has Clinical Cure with Ibezapolstat Also Has Sustained Clinical Cure

Acurx Pharmaceuticals, Inc. has filed a Follow-on Equity Offering in the amount of $17 million.

New major risk - Financial position

Acurx Pharmaceuticals, Inc. Announces Positive Top-Line Ibezapolstat Phase 2 Efficacy Results with 96% Clinical Cure Rate in Patients with C. Difficile Infection

Here's Why We're Not Too Worried About Acurx Pharmaceuticals' (NASDAQ:ACXP) Cash Burn Situation

Acurx Pharmaceuticals, Inc. to Report Q3, 2023 Results on Nov 14, 2023