Acurx (ACXP) Q1 2026 Earnings Transcript

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DATE

Tuesday, May 12, 2026 at 8 a.m. ET

CALL PARTICIPANTS

• President & Chief Executive Officer — David P. Luci
• Chief Financial Officer — Robert J. Shawah
• Executive Chairman — Robert J. DeLuccia
• Medical Director — Michael A. Silverman

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TAKEAWAYS

• Cash Position -- $9.3 million at quarter-end, up from $7.6 million at December 31, 2025.
• Recent Fundraising -- Closed a registered direct offering of 825,085 shares at $3.03 per share and issued short-term warrants for up to 1,650,170 shares exercisable at $2.78 per share; gross proceeds from equity line during the quarter totaled approximately $3.1 million.
• Research and Development Expenses -- $0.3 million for the quarter, down from $0.6 million; the reduction resulted from lower manufacturing costs ($0.1 million) and consulting-related costs ($0.2 million).
• General and Administrative Expenses -- $1.4 million, down from $1.6 million; the decrease driven equally by lower professional fees and legal costs ($0.1 million each).
• Net Loss -- $1.7 million, or $0.62 per diluted share, compared to $2.1 million, or $2.15 per diluted share previously.
• Shares Outstanding -- 3,389,106 as of March 31, 2026.
• Clinical Advancement -- Initiated an open-label pilot study with ibezapolstat in patients with multiply recurrent clostridium difficile infections (rCDI); this study will inform the design of a planned active-controlled Phase III registration trial.
• Phase II Clinical Results -- Ibezapolstat reported a 100% cure rate (25 of 25) with zero recurrences among the 25 cured, including 5 of 5 patients monitored to three months demonstrating sustained remission.
• Regulatory Pathway -- Management noted the FDA's new final guidance that could allow for a single pivotal trial supported by confirmatory evidence to serve as the basis for approval in acute CDI.
• Patent Portfolio Expansion -- Received new patents in Korea and the United States for DNA polymerase IIIC inhibitors and ibezapolstat's use, increasing total granted patents to 10 (five in the U.S. and others internationally).
• Preclinical Program Update -- Presented preclinical data at ESCMID Global showing DNA pol IIIC inhibitors achieved therapeutic plasma levels, reduced MRSA tissue burden, and preserved microbiome diversity in animal models.
• Regulatory Designations -- Ibezapolstat holds FDA QIDP and Fast Track designations for CDI, and SME status in Europe; all pipeline compounds are eligible for QIDP and Fast Track.
• Planned Regulatory Meeting -- Management confirmed a meeting is scheduled with FDA to clarify applicability of single-trial approval pathway for ibezapolstat, referencing new guidance as a pivotal development.
• Trial Initiation Timeline -- The rCDI trial is in active start-up, with first patient in anticipated by August 2026, pending site activation and enrollment speed.

SUMMARY

Acurx Pharmaceuticals (NASDAQ:ACXP) emphasized progress in both clinical and regulatory areas, highlighting newly initiated trials and expanded international patent coverage as direct developments in the quarter. Management cited specific advancements in ibezapolstat's clinical trajectory, regulatory strategy, and funding capacity, all of which may drive future milestones and regulatory submissions.

• The call provided details on ibezapolstat's differentiation, underscoring microbiome preservation and zero recurrences in monitored Phase II patients.
• Participants discussed the shift in FDA guidance to potentially require only one pivotal trial with supporting evidence, which management positioned as potentially accelerating approval timelines.
• Company leaders described distinct regulatory pathways for acute and recurrent CDI, confirming that development strategies are aligned to leverage both under current FDA frameworks.
• Management described plans to collect further long-term recurrence data in Phase III trials, specifically tracking beyond the standard 30-day window, citing competitive positioning.
• Preclinical findings were disclosed showing Acurx’s compounds may achieve efficacy in resistant gram-positive infections while mitigating risks of gut microbiota disruption common to standard antibiotics.
• Leaders referenced current initiatives to further diversify clinical trial populations in response to updated FDA requirements for demographic and geographic representativeness.

INDUSTRY GLOSSARY

• QIDP: Qualified Infectious Disease Product, a U.S. FDA designation offering potential incentives for antibacterial and antifungal drug development.
• LPAD: Limited Population Pathway for Antibacterial and Antifungal Drugs, an FDA guidance supporting approval for drugs targeting serious infections in limited populations.
• CDI: Clostridium difficile infection, a bacterial infection causing gastrointestinal illness, often recurring after initial treatment.
• rCDI: Recurrent Clostridium difficile infection, referring to patients experiencing multiple episodes following presumed cure.
• SME Status: Small and Medium-sized Enterprise status in Europe, allowing specific regulatory support and incentives for drug development.
• DNA polymerase IIIC: A bacterial enzyme and drug target in gram-positive pathogens implicated in Acurx’s antibiotic pipeline.
• MRSA: Methicillin-resistant Staphylococcus aureus, a drug-resistant gram-positive bacterial pathogen.
• MIC: Minimum inhibitory concentration, the lowest concentration of an antimicrobial that will inhibit visible growth of a microorganism in vitro.

Full Conference Call Transcript

David Luci: Thanks, Rob. Good morning, everyone, and thank you so much for joining us to review our financial results for the first quarter of '26 and also to hear some recent updates. Then we'd be pleased to take any questions. For the Q&A, our Executive Chairman, Bob DeLuccia, and our Medical Director, Michael Silverman, have joined us today and will be available for those questions about our rCDI program or other matters. First, I'd like to briefly summarize just a few of our key activities for the first quarter of 2026 or in some cases, shortly thereafter.

On March 9, '26, we issued a press release announcing that we're starting up a ground-breaking ibezapolstat clinical trial program in patients with recurrent CDI or rCDI, that has the potential to shift the paradigm of treatment and prevention of recurrent C. diff from 2 agents to just 1 or ibezapolstat. When coupled with ibezapolstat Phase II results, which showed a 96% cure rate with no recurrent C. diff in 25 of 25 patients who are cured, sparing the microbiome, this new trial has the potential to position ibezapolstat to be a new standard of care as the first agent to treat both acute CDI and prevent rCDI.

In the acute CDI Phase II trial, all 25 patients 100%, treated with IBZ who experienced a clinical cure of CDI were free of recurrence 1-month after treatment. And very importantly, 5 of 5 of these patients who were observed for 3-months after treatment remained free of recurrence. The new clinical trial in rCDI builds on ibezapolstat's strength, namely that no patients who are cured of their infection, experienced a recurrence. So clinicians and patients are avoiding the recurrence trap associated with currently available therapies. This new trial begins with an open-label pilot study to gain experience with IBZ in patients with multiply recurrent CDI who had at least 3 episodes of CDI within the past 12 months.

This will inform elements of a planned active controlled Phase III registration trial in the rCDI indication to be implemented following favorable results from the open-label 20-patient trial. Upon subsequent successful completion of the Phase III pivotal rCDI trial and per the operative FDA procedure, Acurx plans to request FDA approval for treatment and prevention of rCDI under the FDA's Limited Population Pathway for Antibacterial and Antifungal Drugs Guidance for Industry. Acurx clinical program in the broader acute CDI patient population is ready to advance to Phase III international pivotal clinical trials.

In this regard, we're very excited about the FDA's recent announcement published in the New England Journal of Medicine that a 1-trial requirement will be FDA's new default standard that is for registration. If formalized, and we can talk about that in the Q&A, this would end the long-standing 2-trial dogma. We look forward to FDA's further clarification and the potentially favorable implications to our clinical development program, such as the opportunity to seek marketing approval for the acute CDI population with 1 pivotal clinical trial.

On March 30, 2026, we announced that the Korean Patent Office granted a new patent, which covers DNA polymerase IIIC inhibitors, including compositions of matter, methods of use and pharmaceutical compositions, which further strengthen Acurx's intellectual property portfolio and represents the most recent addition to our expanding series of granted patents in the U.S. and internationally. To date, we've secured 10 patents, including 5 U.S. patents, along with patents in Israel, Japan, India, Australia and Korea, all of which protect key aspects of the company's product pipeline. Also and significantly, a new patent was recently issued relating to ibezapolstat and its use to treat CDI while reducing recurrence of infection and improving the health of the gut microbiome.

Additional country-level patent applications remain under review. In February '26, we announced that the USPTO granted a new patent for our DNA pol IIIC inhibitors covering composition of matter and method of use. This patent extends to December 2039, subject to extension under U.S. patent rules. On April 16, 2026, the company announced the closing of a registered direct offering of 825,085 shares of our common stock or prefunded warrants in lieu thereof, at a purchase price of $3.03 per share or prefunded warrant in lieu thereof, priced at the market under NASDAQ rules. In addition, in a concurrent private placement, the company issued unregistered short-term warrants to purchase up to 1,650,170 shares of common stock.

The short-term warrants have an exercise price of $2.78 per share and are immediately exercised upon the issuance and will expire 24-months following the effective date of the registration statement registering the resale of the shares of common stock underlying the short-term warrants. And that registration statement, I'm happy to say, is now effective. This additional funding when coupled with the remaining availability under our equity line of credit ensures that the company has the financial resource to conduct the exploratory clinical trial in recurrent C. difficile. infection.

And just last month, a scientific poster showing our new DNA pol IIIC systemically absorbed compounds in preclinical development to treat other gram-positive infections, achieved potentially therapeutic plasma levels and reduced MRSA tissue burden while maintaining a high microbial diversity similar to baseline and distinct from linezolid. This poster was presented at the 35th Congress of ESCMID Global, The European Society of Clinical Microbiology and Infectious Disease, Annual Scientific Conference held in Munich, Germany from April 17 to April 21. Dr. Khurshida Begum, Research Scientist, University of Houston College of Pharmacy, presented the poster entitled Preclinical Microbiome Evaluation of Novel PolC Inhibitor Compounds.

Using microbiome profiling meta-genomics, the authors concluded that DNA Pol IIIC compounds represent a targeted strategy to treat resistant gram-positive infections while preserving the microbiome structure, minimizing downstream complications associated with antibiotic-induced dysbiosis. We continue to identify and pursue funding opportunities for our Phase III clinical trial program for ibezapolstat in acute CDI. We have several initiatives underway to this end, and we will report results in future updates. As we continually reported, IBZ clinical and nonclinical results continue to outperform in a series of potentially life-threatening infectious disease caused by C. difficile bacteria that the CDC categorizes as an urgent threat and calls for new classes of antibiotics for initial treatment and also have a low incidence of recurrence.

Additionally, ibezapolstat has FDA QIDP and Fast Track designations for treatment of CDI as well as in Europe, small and medium enterprise or SME status. Furthermore, all Acurx compounds in preclinical development are eligible for a QIDP and Fast Track designation, and they target gram-positive infections classified as serious threat priorities by the CDC. We remain confident that while development of ibezapolstat's competitive profile continues to evolve and strengthen, we'll continue to navigate successfully through these challenging times in the macroeconomic environment and in our industry sector. And now back to our CFO, Rob Shawah, to guide you through the highlights of our financial results for the first quarter of 2026. Rob?

Robert Shawah: Thanks, Dave. Our financial results for the first quarter ended March 31, 2026, were included in our press release issued earlier this morning. The company ended the quarter with cash totaling $9.3 million, compared to $7.6 million as of December 31, 2025. During the quarter, the company raised a total of approximately $3.1 million of gross proceeds through purchases under its equity line of credit. Research and development expenses for the 3-months ended March 31, 2026, were $0.3 million compared to $0.6 million for the 3-months ended March 31, 2025, a decrease of $0.3 million.

The decrease was primarily due to a decrease in manufacturing costs of $0.1 million and a decrease in consulting-related costs of $0.2 million as a result of prior year trial preparation-related expenses. General and administrative expenses for the 3-months ended March 31, 2026, were $1.4 million, that was compared to $1.6 million for the 3-months ended March 31, 2025, a decrease of $0.2 million. The decrease was primarily due to a $0.1 million decrease in professional fees and a $0.1 million decrease in legal costs.

The company reported a net loss of $1.7 million or $0.62 per diluted share for the 3-months ended March 31, 2026, that was compared to a net loss of $2.1 million or $2.15 per diluted share for the 3-months ended March 31, 2025, all for the reasons previously mentioned. The company had 3,389,106 shares outstanding as of March 31, 2026. With that, I'll turn the call back over to Dave. Dave?

David Luci: Thanks, Rob, and to all of you for joining us today. Before bringing our operator, Melissa, back to open the call for questions, I'm pleased to introduce to our call Dr. Michael Silverman, our Medical Director, and Bob DeLuccia, our Executive Chairman, to assist with Q&A regarding our rCDI program or any other matters of an R&D nature. Bob and Michael can also respond to questions regarding the recent FDA guidelines for pivotal Phase III trials in C. difficile. And now I'd like to turn the call over to our operator, Melissa, to open the call for any questions. Melissa?

Operator: [Operator Instructions] Our first question comes from the line of Jim Molloy with Alliance Global Partners.

James Molloy: I'd love to walk through the new guidance. You mentioned if this gets formalized with the one-trial, only the one trial needed. Can you walk through what the steps are to actually formalize that? And how confident are you that this will be or at least that the recurrent CDI or the Phase III CDI trial might fit underneath this rubric of...

David Luci: Well, let me start out just by saying before I turn it over to Bob and Mike, we believe this is -- it's formalized as far as the FDA is concerned. It came out as formal guidance Friday night of last week. Now whether or not it can be formalized in kind of our lineage of regulatory interaction with the FDA as it applies to ibezapolstat, that's, I think, the question that we have to answer with the FDA. And thankfully, we have a meeting scheduled to address that, that Bob and Mike can talk about. Bob, would you like to add to that?

Robert DeLuccia: Sure. Thanks, Dave, and thanks, Jim, for the question. So yes, we're still going through this in detail. As Dave said, it just came out Friday night. But at first pass, we don't see anything that will require a change in our pivotal trial design, which is already agreed to, with the FDA. However, we're very excited to see that this new guidance explicitly states and it now formalizes what had been published previously in the New England Journal of Medicine, but now specifically for C. difficile infection, in that it may be possible to rely on one adequate and well-controlled trial with confirmatory evidence to meet the substantial evidence of effectiveness standard.

And we've scheduled a meeting, as Dave said, discuss this with the FDA. And Mike, maybe you can expand a little bit on what FDA considers as confirmatory evidence, which we think strengthens our position with the FDA. Mike?

Michael Silverman: Sure, Bob. Thank you for that. Do you hear me all right?

David Luci: Yes.

Michael Silverman: Okay. And thanks for the question. I just want to emphasize something Dave and Bob said about the formalization, if you will. This new guidance refers back to a lineage of other FDA guidances going back to at least 2019, discussing the feasibility and the requirements for a single trial. What is very important is the new guidance, which is a final guidance, it's not a draft guidance, applies it specifically to C. difficile. And as Bob said, that's one of the things that helps us strengthen our position.

One theme that runs through all the guidances that we're discussing is that, a single trial needs to be supported by what FDA considers to be more or less quoting substantial -- I'm sorry, "confirmatory evidence of substantial efficacy". And by confirmatory evidence, they have a number of criteria, a number of categories of other evidence besides the Phase III trial that would contribute. And we actually tick a few of those boxes, which again helps to strengthen our position. One is mechanistic data, okay? And in anti-infectives, that is something that we can demonstrate in a straightforward fashion because we have our activity in the test tube, our in vitro data, our MICs or killing data for the bacteria.

We also have in vitro test tube data showing anti-virulence activity of our drug, and we have animal efficacy data in the model that is considered to be the standard and has predicted efficacy of other drugs on the market. We know a great deal about the mechanism of action down to the molecular, in fact, the atomic level, which will also support our case. We have microbiome data that Dave referred to, which is another mechanistic aspect that helps build the case for not just treatment efficacy, but reduction of recurrence. And then circling back, you put that all together, the animal model, again, pulls all these factors together and demonstrates the activity.

So that is our position of confirmatory evidence of substantial efficacy.

David Luci: Great. Thanks, Mike. Jim, does that answer your question?

James Molloy: That does. I guess one of the -- my last question would be on the [ phase label ]. You suggest there might be an interim look at 10, you are going to have 20 people in the trial, is the expectation. What sort of the ideal you expect -- you would like to get from this open-label trial to serve for the design of the Phase III, hopefully, the single Phase III trial? And then maybe a quick clarification, too. Throughout the call, you talked about acute CDI, recurrent CDI. And so how do those differ materially from sort of regular CDI?

And I guess, recurring, obviously, it's recurring, but treating the three at the end of the day, it's still sort of the same treatment, correct?

David Luci: Yes. Mike, go ahead. You can clarify between the Phase III trials.

Michael Silverman: Sure, Jim, a couple of different aspects of your questions. One is that the 20-patient trial we're doing is in a population with multiple recurrences. That's different than the Phase III trial we've been talking about as a potential single pivotal trial, which is in patients who've had a single episode or no more than one recurrence, okay? You're absolutely right that when a patient gets an acute episode of C. diff infection, the patient requires antibiotic treatment, okay? That's for the acute episode. Generally, it's 10 days, at least that's the standard for the drugs that are approved now. So that's 10 days of treatment to cure the acute episode.

The problem is that depending on what you read and what drug you used, 20% or 30% of those patients will have at least one recurrence and the recurrence is because the initial infection sets up conditions to allow C. diff to recur. The interesting thing about the new guidance is that for the first time, it talks about not just treatment and prevention of recurrence, it talks about long-term prevention of disease in a prophylactic fashion. So the opportunities for studying patients for short-term cure for kind of intermediate or, let's say, 1-month reduction of recurrence and then for longer-term follow-up for even further reduction of recurrence have actually grown.

So we still will be treating people acutely, all right? And then we observe after that for rates of recurrence. I'm not sure if that answers all your questions.

David Luci: Well, so just to add to that, there's two separate pathways. So you can think of it, Jim, like we have kind of two potential shots on goal. So there's a Phase III pathway in what we call acute CDI, which is currently 2 Phase III registration trials that may now become one trial. And then there's a separate pathway under the LPAD guidance for recurrent C. diff starting with an exploratory 20-patient Phase II, look at the data, and then we would do hopefully a, one trial for Phase III if the FDA agrees, we have LPAD designation and then we can get approval in that sense. So there's two separate pathways to FDA approval.

Robert DeLuccia: And that's our rCDI, Dave? You're right. Because it separates the two. Okay, Jim?

Operator: Our next question comes from the line of Jason McCarthy with Maxim Group.

Jason Mccarthy: Can you talk a little bit about -- and you mentioned it briefly, the importance of microbiome alterations or rather preservation of the good bacteria, how much emphasis there was in the new guidance related to that? And how you plan to present your microbiome data when you meet with FDA this summer to talk about kind of, I guess, the parameters of the Phase III?

David Luci: Thank you. That's a great question. Mike, you can expand a little bit on that on microbiome with the work of Kevin Garey at Houston.

Michael Silverman: Yes, I agree. That is a great question. The microbiome assessment is key to our program, but it's important to understand that this is not something that would be considered for an approvable claim, not something that would initially get us approval or perhaps even end up in the label. Right now, it's an ancillary marker, an exploratory marker because it is not something that the patient experiences. However, the microbiome is critically important in treatment and reduction of recurrence in C. diff. When a C. diff -- C. difficile infection occurs, there is -- and antibiotics given, there's tremendous alteration of the bacteria, which normally live in the gut, the microbiome.

The balance of those bacteria change such that the metabolism in the gut changes, particularly metabolism of bile acids. And certain bile acids are critical in actually suppressing the growth of C. difficile. So when you give antibiotic like vancomycin and the bacteria that create those beneficial metabolites are gone. So you don't have those metabolites that suppress C. difficile. That is one of the key aspects in leading to recurrent disease, the absence of good bacteria and the good metabolites to suppress C. diff. We've seen through our work, as Bob said, with Dr.

Garey at University of Houston, that ibezapolstat and in fact, other compounds in the same series that Dave mentioned, are much gentler on the microbiome and do not lead to the eradication of the "good bacteria" like a drug such as vancomycin would do. So those bacteria that are producing the bile acids that suppress the growth of C. difficile are maintained, and we believe that's a main feature in reducing recurrence. Again, that's not something that would get us approval, but it's part of the pharmacology of the drug that we think we can leverage.

Jason Mccarthy: And also, when you're thinking about I guess, the parameters for the Phase III and you're talking about your data with FDA this summer. Would the recurrence measure or reduced recurrence measure be a standard 30 days, would you go out further even if exploratory because you had those 5 people that went out, I think it was 90-plus days that had no recurrence. And then all of that with -- are you going to have to go head-to-head with vancomycin or fidaxomicin?

Michael Silverman: Yes. Great questions. And again, you're absolutely spot on, on this one. The standard that you'll see for the drugs that are approved and in the studies that have been done is, following the patients for 1-month after the completion of treatment to assess reduction of recurrence. Fidaxomicin does have some raw numbers in its label, but it does not have a claim for reduction of recurrence. And that's a long story behind that. And -- but right now, that's the current standard. We intend to follow patients as we did in Phase II, we intend to follow them in Phase III for that 1-month standard. But -- and you're again spot on.

We are going to follow them out to additional month to assess for recurrence. And the reason that we're -- we've chosen that number is because there are 2 agents out there that are approved for reduction of recurrence and their label has the claim for 8 weeks following acute treatment. So we will be following patients for essentially 2-months after the initial treatment to assess for recurrence.

David Luci: Great. Thank you, Mike. And that's an important distinction and that's going to give us a specific advantage. Thanks for the question, for sure.

Jason Mccarthy: I'm sorry, those 2 drugs are which that have the 8-week plan?

Michael Silverman: Yes. These are in the category that's called live biological products. They're essentially human-made fecal microbiome transplant surrogates. One is VOWST V-O-W-S-T and one is REBYOTA, R-E-B-Y-O-T-A and they're both live bacteria, which are administered to try to restore the normal microbiome balance in the gut.

Operator: [Operator Instructions] Our next question comes from the line of Matthew Keller with H.C. Wainwright.

Matthew Keller: So just quickly, the FDA guidance also mentions or like emphasizes thoughtful selection of patient populations, especially when it comes to elderly populations. So I was wondering if you could talk to us about how your protocols also might align with this part of the guidance, this guidance as well?

Michael Silverman: Yes, Mike Silverman here again. Yes, good question. We're sensitive to that, and we've actually expanded our population relative to Phase II to include essentially all agents. This also gets to the notion of a single trial because one of the items that supports single trial for approval is having diversity of your sites, diversity of your patient population, consistency across various subgroups. The types of subgroups we can actually obtain are not all that varied, okay? We do have the age. We will have geographic diversity. We assume we'll have racial and ethnic diversity. And the only other real factor that enters in here is whether it's a first occurrence or whether it's a first recurrence.

Other than that, the disease is relatively homogeneous, but we are sensitive to the notion of different segments of the population and the need to show consistency across all the segments. I hope that helps.

Matthew Keller: Yes, yes, absolutely. And then also kind of changing subjects a little bit, but just more housekeeping. When can we expect the start of the rCDI trial?

Robert DeLuccia: No, we're actually in start-up mode right now as we are contacting sites, the planned number of sites, and we're interacting with those sites for site qualification visits right now. So we're actually in a start-up mode. We hope to see a first patient in, I would say, probably August time frame. Hopefully, we can beat that if we can accelerate it.

Operator: Ladies and gentlemen, that concludes our question-and-answer session and will conclude our call today. We thank you for your interest and participation. You may now disconnect your lines.

David Luci: Thanks, Melissa.

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