Hello and welcome to the PDS Biotechnology Second Quarter 2023 Earnings Call and Webcast. If anyone should require Operator assistance, please press star, zero on your telephone keypad. A question and answer session will follow the formal presentation. You may press star, one at any time to be placed into question queue. As a reminder, this conference is being recorded. It is now my pleasure to turn the call over to your host, Gabby DeGravina, Investor Relations. Please go ahead, Gabby.

Good morning and welcome to PDS Biotechnology’s second quarter 2023 earnings conference call and audio webcast. On the call from the company are Dr. Frank Bedu-Addo, Chief Executive Officer; Matt Hill, Chief Financial Officer, and Dr. Lauren V. Wood, Chief Medical Officer. Earlier this morning, PDS Biotech issued a press release announcing financial results for the quarter ended June 30, 2023. We encourage everyone to read the press release as well as PDS Biotech’s report on Form 10-Q, which will be filed with the SEC shortly. The company’s press release is available on the PDS website at pdsbiotech.com. In addition, this conference call is being webcast and will be archived on the company website for future reference. Before we begin, we need to remind everyone that on today’s call, the company will be making forward-looking statements regarding regulatory and clinical candidate development plans, as well as research activities. Certain information in this presentation may include forward-looking statements, including within the meaning of Section 21(e) of the United States Securities Exchange Act of 1934, as amended, and Section 27(a) of the United States Securities Act of 1933, as amended, concerning PDS Biotechnology Corporation and other matters. These statements may discuss goals, intentions and expectations as to future plans, trends, events, results of operations or financial condition, or otherwise based on the current beliefs of the company’s management, as well as assumptions made by and information currently available to management. These statements are subject to risks and uncertainties that may cause actual results to differ from those forecasted. A description of these risks can be found in PDS Biotech’s most recent filings with the SEC. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this conference call. Except to the extent required by applicable law or regulation, PDSB undertakes no obligation to update the forward-looking statements included today to reflect subsequent events or circumstances. I will now hand the call over to Dr. Frank Bedu-Addo. Frank?

Thank you Gabby, and thanks to all for joining our second quarter 2023 call this morning. We are pleased with the progress we have made so far this year. Our primary goal is to create groundbreaking therapies that can significantly revolutionize cancer treatment. Our current primary focus is on advancing and commercializing our lead clinical candidate, PDS0101, designed for the treatment of recurrent or metastatic HPV16-positive head and neck cancer. PDS0101 is an innovative investigational HPV16 targeted immunotherapy therapy that stimulates a potent and precise T-cell attack on HPV16-positive cancers. In the upcoming controlled and randomized VERSATILE-003 trial, we will examine PDS0101 in combination with Merck’s anti-PD1 therapy, Keytruda, or pembrolizumab compared to Keytruda monotherapy, which is the current standard of care for first line treatment of recurrent or metastatic head and neck cancer. I am pleased to mention that we filed the final VERSATILE-003 Phase III protocol with supporting chemistry, manufacturing and controls, or CMC information to our existing IND last week on schedule, as planned and previously announced. I congratulate the PDS Biotech team on achieving another key milestone on our path to commercialization of PDS0101. This filing moves us a step closer to another significant upcoming milestone, the initiation of the Phase III trial in the fourth quarter of this year. As you can imagine, we are all eagerly looking forward to the commencement of VERSATILE-003. This will hopefully move us towards the filing of a biologic license application, or BLA, and the increased potential to get PDS0101 successfully commercialized and available to head and neck cancer patients who are in desperate need of safer and more effective therapies. Advanced head and neck cancer, as many of you may already know, is one of the most devastating and debilitating cancers with one of the highest suicide rates…

Thank you Frank. Let’s now turn to the high level interim data presented in a poster at the ASCO 2023 Annual Meeting by Dr. Katharine Price of Mayo Clinic, and included as a featured poster reviewed by an expert panel in the head and neck cancer discussion session. The advocacy highlights include the following: a 12-month overall survival rate of 87% on the combination therapy. Published results document 12 months overall survival rates of 36% to 50% in patients with recurrent or metastatic head and neck cancer receiving approved immune checkpoint inhibitors used as monotherapy. The median progress-free survival was 10.4 months. Published median progression-free survival results report two to three months for approved immune checkpoint inhibitors when used as monotherapy in patients with similar PDL1 level expression in their tumors. The disease control rate, which is defined as disease stabilization or tumor shrinkage, was seen in 71% of patients. In addition the ASCO data, in July we announced that we had achieved 14 confirmed responses suggesting that PDS0101 has an additive effect over published results seen with immune checkpoint inhibitor monotherapy. In addition to the previously mentioned 12-month overall survival rate of 87%, this provided us with further confidence moving forward with the Phase III randomized trial. Importantly in the VERSATILE-003 Phase III trial, the primary efficacy endpoint will be overall survival rather than objective response, the endpoint that the FDA has prioritized for approval; consequently, we have designed our Phase III trial to show improved overall survival of PDS0101 plus Keytruda over Keytruda alone to maximize our opportunity to achieve BLA approval. With respect to safety, we are finding the combination to be well tolerated with only four of the 48 patients, or 8.3% having grade 3 treatment-related adverse events, also known as TRAEs, at the time of…

Thank you Lauren. Now turning to our financial results for the three months ended June 30, 2023, net loss for the three months ended June 30, 2023 was approximately $11.5 million or $0.37 per basic and diluted share, compared to a net loss of $5.8 million or $0.20 per basic and diluted share for the same period in 2022. The higher net loss this quarter was due to costs incurred in connection with the research, development, and VERSATILE clinical programs. Research and development costs, which include clinical and manufacturing expenses for the quarter ended June 30, 2023 increased to approximately $8 million compared to the $3.8 million for the same period in 2022. The increase of $4.2 million is primarily attributable to an increase of $1.4 million in clinical trials, $0.5 million in personnel costs which include $0.2 million in non-cash stock-based compensation, and $2.3 million in manufacturing expenses. General and administrative expenses for the second quarter of 2023 increased to approximately $4.7 million compared to $3.3 million for the same period in 2022. The increase of $1.4 million is primarily attributable to an increase of $0.5 million in personnel costs, including $0.4 million in non-cash stock-based compensation and $0.9 million in professional fees. Total operating expenses for the quarter ended June 30, 2023 were approximately $12.7 million compared to total operating expenses of approximately $7.1 million for the same period in 2022. Our cash and cash equivalents as of June 30, 2023 totaled approximately $60.6 million and based on the company’s cash resources and projections, we believe this balance is sufficient to fund operations and our research and development of clinical programs for the 12 months following the filing of our June 2023 quarterly report on Form 10-Q, which will be filed today. We continue to be engaged in business development opportunities and will continue to manage our cash prudently. This concludes my discussion, and at this time, I would like to hand the call back to the Operator for the Q&A session. Operator?

Thank you. We will now be conducting a question and answer session. [Operator instructions] Our first question today is coming from Joe Pantginis from HC Wainwright. Your line is now live.

Good morning everyone. Thanks for taking the question, and happy summer. First, just wanted to get a sense of the operational readiness for the Phase III - I mean, fourth quarter is not too far away, so obviously everything is probably all set. Wanted to get a sense of what the targeted enrolment is, randomization, is it one-to-one, assuming the supply’s all ready to go, the diagnostic, and then of course Lauren already discussed the benchmarks. We’ll start with that. Thanks a lot.

Hey Joe, thanks a lot for your question. With respect to the operational readiness, as you know, there are a number of things that have to happen beyond just the submission of the IND amendment and update to the IND. A number of those are actually actively ongoing currently. We have to activate the clinical sites. We’re currently looking at, as Lauren said, 90 to 100 clinical sites, so in the process of getting those sites up and running. We have had very good response, higher than expected. We actually have about 100 clinical sites who have already indicated interest in participating in the Phase III data, and we believe that is directly related to the data that was presented at ASCO, the overall survival as well as the safety. As you know, head and neck cancer oncologists are really looking for something that can help their patients live longer with higher quality of life that’s well tolerated, so we believe that’s really largely responsible for the larger than expected interest that we’re seeing in these clinical sites, so we’re getting all those sites up and ready, waiting for the green light from the FDA and then we actually have to start getting the institutional review boards at the various sites to also approve these trials. The good thing is that in terms of manufacturing, the manufacturing is done. The product has been manufactured, and so all that information is what was utilized to update the CMC section. We’re looking at a target enrolment of anywhere between--I would say between 200 to 300 patients, pending we’re waiting for the final feedback from the FDA. As you know, we submitted those documents last week for the IND, and so once we have the final either green light or any feedback from the FDA, we can then make the actual final protocol available to everyone, but we’ve submitted what we anticipate could be the final protocol but we always want to wait to get the FDA’s feedback before we say, this is the absolute final protocol that’s moving into the Phase III trial. But so far, we are very pleased and we’re excited to get this going, and we think this is a really solid protocol that was developed based upon inputs that we received from the FDA, so we actually took all the FDA’s feedback into consideration in putting this protocol together as this is going to be a control trial, right, with Keytruda as the control arm.

That’s very helpful, Frank. Thank you for that. Then I guess just--well, maybe--well, quickly on the 0301 study with docetaxel, very intriguing, and I was just curious what are the levels of translational data that you’re looking to gather for that study, and then also, talking to the immune approach in combination with docetaxel, I guess maybe you or Lauren can discuss the approach that you’re taking here, because even going back years ago with data out of the Gulley and Schlom labs that talked about the benefit or lack thereof, or what’s best to do with regard to, say, concomitant dosing with docetaxel or sequencing or what have you, so looking to get more info on the translational info. Then lastly, just curious since it’s not discussed today but it’s always in the forefront of people’s minds in the world, is what’s percolating in the background with regard to influenza? Thanks a lot.

Really good questions, Joe. I’ll address the influenza and then I’ll hand over to Lauren to address the translational studies with PDS0301. With the flu program, this program continues to progress under the NIAID CIVICs program, and so Joe, as you know, as is typical with flu vaccines after successful mouse studies, the vaccines are then usually tested in ferrets, and ferrets are considered the gold standard and the most relevant to human results, so these studies in ferrets are currently ongoing with PDS0202 at the CIVICs-selected centers, and so based upon what’s going on now in those ferret studies, we do intend to provide an update when these results are available and also once the clinical studies are confirmed by NIAID. Those studies are continuing to progress. Lauren, I’ll hand over to you to discuss the translational studies for PDS0301 and with docetaxel.

Great. Good morning and thanks for your question, Joe. Your question is an excellent one, and one of the things that’s coming out of Dr. Madan’s study is there is actually concurrent dosing of PDS0301 and docetaxel, specifically there is also examination of different dose levels of PDS0301 in the docetaxel combination, and they’re looking at both metastatic castration sensitive as well as castration resistant prostate cancer. The translational relevance here is that we really want to, one, ensure the safety of the co-delivery of the combination together, more importantly since NHS IL12 is a tumor targeting immunocytokine, we really want to see if there are differences in terms of the magnitude of immune responses and clinical outcomes that we see with different doses when it’s delivered in combination with docetaxel. Our hope is that since we know docetaxel induces tumor necrosis, that co-delivery of PDS0301 could actually augment this tumor necrosis. From a translational standpoint, our interest is not only in the fact that PDS0301 is a tumor targeting T-cell immunocytokine that we see augmentation of these tumor specific T-cell responses, but also the possibility of augmenting natural killer cell responses to this combination therapy, so we’re really looking forward to Dr. Madan’s presentation at Cytokine 2023, and this would lead to building on further studies once we know what we see as far as the clinical outcomes and the immune responses.

Great, thanks for all the color.

Thank you. The next question today is coming from Louise Chen from Cantor Fitzgerald. Your line is now live.

Good morning and thank you for taking my questions, and congratulations on the quarter. This is Lucas Duffy on for Louise Chen from Cantor. I have two quick questions. I guess they’re more big picture strategy-slash-vision questions. First question is with regards to your Versamune platform. You’ve had a lot of success to date leveraging it with PDS0101 or 0102, 0304, etc. What is your vision for the future of developing the platform, or how do you hope to expand on the platform success to date? Then the second question is if you could talk a little about your partnership with the NIH and if there’s any important developments there, or how you see that progressing moving forward. Thank you.

Thanks a lot, two very good questions. The Versamune platform is first being developed with PDS0101. PDS0101, we really see as a proof of concept study for the platform. Just based upon what’s happened with the T-cell activating technologies over the last couple of decades, we believe it’s very important for us to really demonstrate this strong proof of concept for the industry to really understand the potential of PDS0101. As you know, we’ve also performed pre-clinical studies with PDS0102, which is utilizing the same platform in TARP-specific tumors, so these would address prostate cancer and breast cancer. We have also performed those preclinical studies with PDS0103 that addresses MUC1 positive cancer, so these are cancers like ovarian cancer, non-small cell lung cancer, breast cancer and colon cancer. In preclinical studies, we have demonstrated that we can generate the same levels of multi-functional tumor targeted killer T-cells with each of these products, so really with the PDS0101 now, our goal is really to get this rapidly into commercialization. PDS0101, as you know, addresses all types of HPV-associated cancers; however, we have an initial focus on head and neck cancer, which is the largest and most rapidly growing of these HPV indications. As I mentioned, I think on the last call, we had a meeting with the FDA regarding the triple combination, which we intend to also move initially into head and neck cancer. We also have the studies ongoing currently at Mayo Clinic which is looking at early stage as a new adjuvant treatment in patients who have oral cancer ahead of their surgical removal of the lesion, so we’re really looking to position, strongly position PDS0101, which is the first Versamune-based product, as a therapy for head and neck cancers from early stage treatment all the way through recurrent…

Okay, thank you very much for the answers and the color. No follow-up questions from me, thank you.

You’re welcome.

Thank you. The next question is coming from Kalpit Patel from B. Riley Securities. Your line is now live.

Yes, good morning and thanks for taking the questions. First, for the additional updates that you expect to report later this quarter, I believe you said, how many more months of follow-up should we expect for the [indiscernible] trial?

With PDS--you’re talking about the VERSATILE-002 trial, Kalpit, is that correct?

Correct, yes.

Yes, so I am not privy to the clinical data, but I am hopeful that when we provide the updates later this quarter, we’ll hopefully have updates on the 12-month overall survival and hopefully also have an update on the 24-month overall survival. Those will be the two key updates that I would expect, especially since those were key for design of the Phase III clinical trial. As you know, the FDA is most interested in the overall survival, and that’s how this trial has been powered, so those would be two key updates that I would be hopeful that we get before the end of the quarter.

Okay, and then based on your expectations of enrolling 90 to 100 sites in the Phase III, assuming--let’s assume you start in the fourth quarter, when would you expect the interim analysis to hit, and the primary endpoint as well?

The primary endpoint for the trial is overall survival. The planned interim analysis will be conducted after enrollment is complete and after a pre-specified number of events have occurred. Since this endpoint is overall survival, the events will be death events, and a certain number of death events has to occur to meet either the interim endpoint or the final endpoint. Really, the enrollment projections were informed by our CRO feasibility analysis, and they estimate about an 18 to 24-month accrual period pending the actual enrolment rate and the actual occurrence of these events. It’s not very easy to predict exactly when that time will occur, but the initial interim endpoint will be right after the completed enrolment for the trial, so that could be anywhere between an 18 to 24-month accrual period.

Okay, perfect. Thanks very much, Frank, for taking the questions.

You’re welcome.

Thank you. As a reminder, that’s star, one to be placed in the question queue. Our next question is coming from Leland Gershell from Oppenheimer. Your line is now live.

Hi, thanks for taking our questions. I’m wondering, Frank and Lauren, what your view may be on accelerated approval potential for PDS0101 in the VERSATILE-003 study. Following the FDA draft guidance that came out in March, as you may be aware, with recommendations on development of drugs for accelerated approval in oncology, randomized trials such as VERSATILE-003 could use the ORR as a submissible endpoint for accelerated approval. Given the robust responses you’ve seen so far in that population, wondering if there may be an opportunity for you to submit earlier, ahead of the mature OS data, and then use the OS data from 003 as confirmation of efficacy. Thanks.

Leland, I’ll take a stab at it and then I’ll also hand over to Lauren to add to my response. I think as you know, we do have fast-track designation, and we would like to take advantage of that to have more frequent discussions with the FDA as the data becomes available. We do understand that currently, the VERSATILE-002 data is extremely encouraging, and we are hopeful that if as we get to the interim data points, if the data looks anything close to what we’re seeing currently with VERSATILE-002, that we’ll have the opportunity to discuss an accelerated approval with the FDA. Even though overall survival is the primary endpoint, we also do have secondary endpoints such as objective response rates and PFS, that we will be monitoring, but in head and neck cancer specifically, the FDA made it very clear to us that since objective response rates have not really correlated with overall survival, they are primarily interested in overall survival in head and neck cancer, and so that’s why we powered this trial specifically for overall survival. But we’ll definitely take advantage of the fast track to have discussions with the FDA earlier on as the data begins and continues to emerge. Lauren, anything you’d like to add to that?

Yes, the only thing I’d like to echo, Leland, is that ultimately with accelerated approval like you mentioned, a confirmatory trial is required, so while VERSATILE-003 is powered for the primary endpoint of overall survival, once we have our final data cut and follow-up from VERSATILE-002 next year and also have those final overall survival rates for 12 months and 24 months, as well as the objective response rates, that will be another opportunity for discussions with the Agency in terms of additional accelerated approval discussions.

Okay, that’s helpful. Then with respect to MUC1, when might we see initial data from the MUC1 study?

Well, we have not actually started that study yet, so at this point, I will not provide any timelines as to when we’re going to see data. We are hopeful that we will file the IND by the end of this calendar year, which will allow us to get the clinical trial going probably by early next year, and so it’s--once we have more clarity on exactly what the clinical design is going to look like, we will be able to provide more information on when we should expect to see data. Hopefully on the next call, we’ll have some more clarity around that question.

All right, thanks for taking the questions.

You’re welcome.

Thank you. The next question is coming from Robert LeBoyer from Noble Capital Markets. Your line is now live.

Good morning. Just one more follow-up question on the design of VERSATILE-003. In the interim analysis, OS and PFS have been mentioned previously. Is PFS still going to be an interim analysis factor or endpoint that you can discuss with the FDA?

We will certainly be collecting the PFS information, but both the interim and the final endpoints have been powered for overall survival.

Okay. One question on the triple combination - you had mentioned that the design of the Phase III was in progress. Any timing on the submission of an IND for that, for the start of the Phase III?

With that trial specifically, we are waiting to get--this is going to be, as I mentioned, in patients checkpoint refractory head and neck cancer, and checkpoint refractory head and neck cancer is the indication we’re evaluating in the second arm of the VERSATILE-002 study, and so as we mentioned on the last call, we expect that this quarter, we will be obtaining initial information from the first 21 patients who are being treated, the first 21 checkpoint refractory head and neck cancer patients in the VERSATILE-002 trial. Primarily what we’re looking for from that trial is overall survival and how it impacts, and how additional PDS0101 to Keytruda may allow those patients to respond and continue to survive. That information is going to be critical together with the information we have from the triple combination trial to design the final, what we intend and hope to be a registrational study. One of the things we will do with that design is something very similar to what we did with Keytruda, really maximize our interactions with the FDA, get the FDA’s feedback. We would like to understand what key elements the FDA would like to see in that trial to allow it to be a registrational trial, so that’s interaction that we expect to be having with the FDA probably starting later this year. Based upon those interactions and getting a really good understanding of what they would like to see in that trial to make it registrational, we will then be able to then project exactly when we start, but we would like to start initiating those--get the initial protocol down and start those interactions with the FDA before the end of this year.

Okay, thank you very much.

You’re very welcome.

Thank you. The next question is coming from James Molloy from Alliance Global Partners. Your line is now live.

Hello, this is Laura Suriel calling for Jim Molloy. Thank you for taking the questions. For the Phase III VERSATILE-003 trial, with it being set to be initiated by the end of the year, if it’s not too early to tell, when do you think you might complete enrollment here or announce a first look or interim data?

As we discussed earlier, that timing, we expect it based upon what the potential enrollment projections are, so we looked at what our CRO projected enrollment could potentially be for the various sites and also based upon the actual accrual and occurrence of the events that we expect to see for the trial, we anticipate that the enrollment could take anywhere between 18 to 24 months to be completed. At that point, we will then have our first interim analysis.

Got it, and then also for the NCI-led Phase II trial of 0301, when might we get additional data for this trial following the Cytokine meeting that’s going to be held this October, and some of the other timelines here as well?

I’ll hand that question over to Lauren, since she has more information on that trial.

As it relates to the NCI triple combination study that examines PDS0101, 0301 and--

I think, Lauren, I think that was the docetaxel trial she was asking about.

Oh, okay. I thought there was interest in updated data. I just wanted to highlight the fact that there will be updated survival data before the end of this quarter, and then following the Cytokine meeting presentation, I think there will be additional discussions in terms of further expansion of the study at the dose levels of PDS0301 and docetaxel that yielded optimum tolerability, as well as immune responses that are being examined and that will be presented at Cytokine 2023.

Got it. Thank you for taking the questions.

Thank you. We have reached the end of our question and answer session. I’d like to turn the floor back over for any further or closing comments.

Well, thank you very much Lauren and Matt, and to our attendees, we very much appreciate you joining our second quarter earnings conference call today. This quarter’s progress has been truly exciting and we remain enthusiastic about what lies ahead for the rest of the year. Before concluding the call, I would like to mention that we are planning a key opinion leader event in the near future. The webcast will include experts who will provide their perspectives on PDS0101, any data updates, and its potential in the treatment of advanced head and neck cancer. Please look out for more details as we get closer to the event. As you have seen from our press releases and as I have reiterated here on this call, we are excited to share the many data readouts that are on the horizon and that hold significant promise and potential value to our investors. We have made great strides on the path to achieve our goal of advancing a paradigm shift in the way head and neck cancer is treated with a potentially well tolerated, safe and effective treatment that extends the survival of advanced head and neck cancer patients. We strongly believe that in the very near future, these patients who have a critical unmet medical need will live longer and have a higher quality of life as a result of the work we’re doing here today. Thank you very much for your continued support, and we look forward to updating you on our progress. Thanks a lot.

Thank you. That does conclude today’s teleconference and webcast. You may disconnect your line at this time and have a wonderful day. We thank you for your participation today.