Greetings ladies and gentlemen. Thank you for joining Puma Biotechnology’s Third Quarter Earnings Call. At this time, all participants are in listen-only mode. Please note that this conference is being recorded. I will now turn the conference over to your host Mariann Ohanesian, Senior Director. Thank you. You may begin.

Thank you, Diego. Good afternoon. And welcome to Puma’s conference call to discuss our financial results for the third quarter of 2020. Joining me on the call today are Alan Auerbach, Chief Executive Officer, President, and Chairman of the Board of Puma Biotechnology; Maximo Nougues, Chief Financial Officer; and Jeff Ludwig, Chief Commercial Officer. After market closed today, Puma issued a news release detailing third quarter 2020 financial results. That news release, the slides that Alan and Jeff will refer to, and a webcast of this call are accessible via the homepage in the investors section of our website at pumabiotechnology.com. The webcast and presentation slides will be archived on our website and available for replay for the next 90 days. Today's conference call will include statements about the company's future expectations, plans, and prospects that constitute forward-looking statements for purposes of federal securities laws. Such statements are subject to risks and uncertainties, and actual results may differ from those expressed in these forward-looking statements due to a number of factors, which include the risk factors disclosed in the periodic and current reports filed by Puma with the SEC from time to time. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this live conference call, November 5, 2020. The company undertakes no obligation to revise or update any forward-looking statements to reflect events or circumstances after the date of this conference call, except if required by law. During today's call, we may also refer to certain non-GAAP financial measures that involve adjustments to our GAAP figures. We believe these non-GAAP metrics may be useful to investors as a supplement to but not a substitute for our GAAP financial measures. Please refer to our third quarter 2020 news release for a reconciliation of our GAAP to non-GAAP results. I will now turn the call over to Alan.

Thank you, Mariann, and thank you all for joining our call today. Today, Puma reported total revenue for the third quarter of 2020 of $80.8 million. Total revenue includes net U.S. NERLYNX sales as well as license and royalty fees from our sublicensees. Net NERLYNX sales were $49.3 million in the second quarter of 2020, representing a slight increase from the $48.8 million in net sales reported in the second quarter of 2020, and a decrease from the $53.5 million reported in Q3 of 2019. During the third quarter of 2020, we continued to experience challenges brought on as a result of the COVID-19 pandemic. Our third quarter results also included royalty revenue of $1.5 million. I will begin with a review of some of the highlights of the quarter, and then Jeff Ludwig will provide more details on NERLYNX’s commercial activities. Maximo Nougues will follow with highlights of the key components of our financial statements for the third quarter of 2020. As investors are aware, Puma has an ongoing trial of neratinib in the extended adjuvant HER2-positive early breast cancer setting, referred to as the CONTROL trial, where we are investigating the use of several prophylactic techniques, including the use of anti-diarrheal drugs or dose escalation to reduce the incidence of neratinib-related diarrhea and improve the tolerability of the drug. Interim results from the CONTROL trial were published in the September issue of the medical journal, Annals of Oncology. These results demonstrated that the incidence of Grade 3 diarrhea with neratinib can be reduced, and the tolerability of the drug can be improved significantly using a wide variety of anti-diarrheal strategies. We believe this publication will help to increase awareness of using these techniques to improve the tolerability of the drug. We further anticipate that additional results from the trial will be presented in the fourth quarter of 2020, which may further help increase awareness of these prophylactic techniques. In addition, in early October, we announced that the efficacy results of neratinib in HER2-positive HR-positive early-stage breast cancer from our Phase 3 ExteNET Trial were published in the journal, Clinical Breast Cancer. We believe that this population will also increase the awareness of NERLYNX and its benefits in this patient population. As investors are also aware, Puma has an ongoing basket trial of neratinib in HER2-mutated cancers referred to as the SUMMIT trial. The SUMMIT trial was modified in early 2020, such that ER-positive, HER2-negative breast cancer patients who have a HER2 mutation will be randomized to receive either fulvestrant alone, fulvestrant plus trastuzumab, or the combination of neratinib plus fulvestrant plus trastuzumab. Under the initial Simon 2-stage design, each arm of the amended study will enroll seven patients during Stage I. And if no patient in a given arm responds, that arm is closed for further enrollment. If in the first Stage I one or more patients respond, the arm will then be expanded up to 18 patients. If less than four patients in the expanded arm respond, that arm will be closed to further enrollment. If more than four patients respond, the arm has expanded and additional patients are enrolled. As reported on our second quarter earnings call, enrollment into the SUMMIT trial in Q2 of 2020 was negatively impacted by the COVID-19 pandemic. Enrollment did increase slightly in the third quarter and continued to increase in the month of October. Assuming this trend continues, we anticipate that enrollment into the initial Simon 2-stage for the HR-positive breast cancer cohorts of the trial will occur in the first half of 2020. However, we recognize that this could continue to be impacted by COVID-19. And we also recognize the potential uncertainty associated with any additional wave of COVID-19 should one occur later this year or early next year. Once we receive the initial results from the Simon 2-stage in the HR-positive breast cancer cohorts, we plan the schedule of the pre-NDA meeting with the FDA to discuss the potential for accelerated approval. We also anticipate that in the first quarter of 2021, we will be reporting Stage II data from the cohort of the SUMMIT trial, in which patients with bile duct cancer with HER2 mutations were treated with neratinib monotherapy. In addition, the Simon trial was most recently amended to include a new cohort of patients to be treated. This cohort included patients with non-small cell lung cancer, with EGFR exon 18 mutations who were treated with neratinib monotherapy. We are today presenting the preliminary efficacy data from this cohort of patients. As you can see on the slide, EGF exon 18 mutations are rare mutations in lung cancer. Exon 18 mutations comprise approximately 5% of the EGFR mutations detected in lung cancer. The preclinical data has demonstrated that EGFR exon 18 mutations appear to be sensitive to neratinib. The data on this slide shows the preclinical efficacy of several EGFR-directed tyrosine kinase inhibitors or TKIs against EGFR exon 18 mutations. As you can see from the endometrial data on this slide, neratinib appears to have the strongest preclinical potency against EGFR exon 18 mutations, compared to the other EGFR-directed TKIs tested. Neratinib was previously tested in a Phase 2 clinical trial in lung cancer. This trial was published in 2010 in the Journal of Clinical Oncology. In that trial, there were four patients with exon 18 mutations in lung cancer who enrolled in the trial, all of whom had a G719X mutation. Of the four patients with exon 18 mutations, three experienced a partial response with a median PFS of 52.7 weeks. Based on this data, we amended the SUMMIT trial to open a new cohort for patients with exon 18 mutated non-small cell lung cancer. These patients were treated with neratinib monotherapy. The study was designed as a Simon 2-stage trial, where we initially enrolled seven patients during Stage I. If no patient responded, we would close the arm for further enrollments. If in the first stage one or more patients responded, the cohort was expanded up to 18 patients. If less than four patients in the expanded arm respond, the arm will be closed to further enrollments. If more than four patients respond, the arm would be expanded and additional patients will be enrolled. To date, there have been 11 patients enrolled in this cohort. These patients received a median of two prior treatments in the metastatic setting, including treatment with chemotherapy and checkpoint inhibitors. Importantly, there were 10 patients in the trial who received prior treatment with an EGFR-directed tyrosine kinase inhibitor, which included reversible TKIs like dasatinib and erlotinib, as well as irreversible inhibitors like osimertinib and afatinib. The preliminary efficacy data from the trial demonstrates that for the 10 patients who received prior EGFR TKI treatment, six patients or 64% showed a partial response as the best overall response with four of these responses or 40% being confirmed partial responses. The median duration of these responses was 7.5 months. In this cohort of 10 patients who received prior EGFR TKI treatment, the clinical benefit rate was 80%, and the median PFS was 9.1 months. As you see on the slide, you can see the waterfall plot on the right and the score plot on the left. As you can see from the plots, several patients had either single or complex EGFR exon 18 mutations, and responses were seen in both groups of patients. Of the 10 patients who had received prior EGFR TKI treatment, all of these patients had the G719X mutation, which was present either as a single mutation or as a complex mutation in combination with either E709X, S768I, and/or T790M. As of the August data cutoff, there are still four patients being treated with neratinib monotherapy. Safety data from the trial demonstrated that for the 11 patients in the trial, the most common adverse event was diarrhea. There were no cases of Grade 3 or higher diarrhea, and there were five patients or 45.5% of the patients experiencing any grade diarrhea. Looking at this diarrhea data closer, of the five patients who experienced diarrhea, one patient had Grade 2 diarrhea, and four patients had Grade 1 diarrhea. No patient required a dose hold, dose reduction, or permanently discontinued neratinib due to diarrhea. To put this data into context, the only drug that is FDA approved that has exon 18 mutations in its label is afatinib, which is commercially known as Gilotrif. As you can see on the slide, in patients who have previously been treated with an EGFR TKI, afatinib has demonstrated an overall response rate of 10.5%. Although it is early, we believe that the data with neratinib and SUMMIT compares favorably to this afatinib data. The predetermined success criteria has been met for both the first stage and second stage of the Simon 2-stage criteria for this cohort of exon 18 EGFR mutated non-small cell lung cancer patients. Enrollment is now continuing in the second stage up to a total of 30 patients. We expect to present additional updated data from this cohort of patients in a medical conference during the first half of 2021. We further anticipate scheduling a meeting with the FDA to discuss the potential for accelerated approval in patients with EGFR exon 18 mutated non-small cell lung cancer who have previously been treated with an EGFR tyrosine kinase inhibitor sometime in 2021. In addition to the progress in the SUMMIT trial, on October 15, the National Comprehensive Cancer Network announced its plans to collaborate with Puma to study neratinib in various cancer research projects, to explore its role in different tumor types. I will now turn the call over to Jeff Ludwig, Puma’s Chief Commercial Officer for a review of our commercial performance during the quarter.

Thanks, Alan. I appreciate it. And thanks to everyone for joining this call. This is the second earnings call that I have had the privilege of representing Puma’s commercial organization. And I can tell you that the team is working very hard to reposition the brand, tighten up our focus and execution, and deploy resources in a very smart and efficient manner. I am proud of the progress that the team is making, but all of us realize that more must be done to help patients and their families battling breast cancer. Before I move into the commercial review, just a reminder that I will be making forward-looking statements. As you may recall, we have two channels that provide their links to patients. We refer to these as our specialty pharmacy channel and our specialty distributor channel or in-office dispensing channel. The majority of our business flows through the specialty pharmacy channel. More specifically, in Q3, approximately 77% of our business went through this channel with the remaining 23% flowing through the specialty distributor channel. This is in line with what we reported during our Q2 earnings call as well. Now, later in this call, Maximo will review the full financial results, but I will now provide you with the current U.S. sales results. We continue to operate in a very unique environment with the COVID-19 pandemic still impacting the majority of the country with no clear end in sight. As of yet, the commercial team has worked very hard to adapt to this new reality, but our overall promotional activities continue to be impacted in Q3. As expected, live face-to-face interactions with healthcare providers were very limited, with virtual engagements becoming the norm. But our net overall promotional interactions combining both live and virtual were down from our pre-COVID baseline. As we reported during our Q2 earnings call, we did see a decline in the number of new patients signing up through our specialty pharmacy channel in May with some recovery in June, which we believe was related to the ebb and flow of the stay-at-home orders and the quarantines that were in place in various parts of the country. The volatility of COVID-19 continued throughout Q3 with some softening in both the specialty pharmacy channel, as well as within the specialty distributor channel. Slide 4 shows U.S. quarterly net sales of NERLYNX since FDA approval. As Alan noted, our net U.S. product sales were $49.3 million in the third quarter of 2020; this is a slight increase over the $48.8 million we reported in Q2 of 2020. Slide 5 shows the bottles of NERLYNX sold by quarter since launch. We sold 3,611 bottles of NERLYNX in Q3 of 2020, which is a decrease of about 3% from our Q2 2020 bottle sales of 3,728. As mentioned previously, we believe that the COVID-19 pandemic and its impact on our promotional access played a role in the softness. With that said, the team is focused and committed to changing these trends. Alan highlighted in his opening remarks two key publications that recently occurred. The first one was the publication of the interim result of the CONTROL study published in the September edition of Annals of Oncology. This is important because it highlights that antidiarrheal strategies can significantly reduce the incidence of Grade 3 diarrhea and improve overall tolerability of NERLYNX. The second publication included the final efficacy results from the ExteNET Trial, which was recently published in clinical breast cancer in early October. This is important because, among other things, it highlighted the benefits seen in an exploratory analysis of patients at heightened risk of disease recurrence. These patients were HER2-positive, HR-positive with residual disease receiving NERLYNX within one year, following the trastuzumab-based therapy. This exploratory analysis demonstrated a consistent benefit in invasive disease-free survival, overall survival, and CNS events. We believe that these two publications are very important and will play a positive role in changing the perception of the risk-benefit profile of NERLYNX going forward. Having important new data not only makes our current interactions more effective, but it also helps to increase our overall access to customers. As an early indicator of the impact the control publication can be seen on Slide 6, which shows that in Q3, approximately 33% of all new patient starts were initiated at a reduced dose. This is an increase over Q2, but more importantly, it is being driven by a fairly significant change in September where over 40% of new patients started at a reduced dose. This is important since the control data show that utilizing a dose-escalation strategy in the extended adjuvant setting, coupled with PRN loperamide showed a greater than 60% reduction in Grade 3 diarrhea, a 60% reduction in median cumulative days of Grade 3 diarrhea, and an approximate 80% reduction in discontinuation. We believe that improving the tolerability of neratinib and reducing discontinuations should increase the average length of therapy and ultimately help more patients in their battle with breast cancer. Slide 7 highlights the strategic collaborations we have formed across the globe with the goal of making NERLYNX available to patients around the world. We are very happy with the progress that was seen in 2019 and are very glad that this trend has continued in 2020. Key highlights include the following: in Q3, medicine received approval in metastatic breast cancer in Israel. Knight’s submission for a metastatic indication was accepted by Health Canada in September. Pint-Pharma received approval in Ecuador in Q3. Pierre Fabre is planning a Q4 launch in Finland. And finally, Bixink filed their NDA in South Korea in October. During the remainder of 2020 and beyond, we look forward to the potential for NERLYNX to be approved in additional countries in Europe, Latin America, Asia, Southeast Asia, and the Middle East. In summary, I am proud of the work that is being done by the team and believe that we are well positioned to increase the impact that we are having on patients battling HER2-positive breast cancer. I will now turn the call over to Maximo for a review of our financial results. Maximo, the floor is yours.

Thanks, Jeff. I will begin with a brief summary of our financial results for the third quarter of 2020. Please note that I will make comparisons to Q2 and Q1 2020, which we believe are better indications of our progress as a commercial company than year-over-year comparisons. For more information, I recommend that you refer to our 10-Q, which will be filed today that includes our consolidated financial statements. For the third quarter of 2020, we reported a net loss based on GAAP of $31.5 million, or $0.79 per share. Our GAAP net income for Q2 2020 was $3.4 million and our GAAP net loss for Q1 2020 was $16.99 million. On a non-GAAP basis, we adjusted to remove the impact of stock-based compensation. We reported a net loss of $23.9 million, or $0.60 per share for the third quarter of 2020. Gross revenue from NERLYNX sales was $58.6 million in Q3 2020, versus $57 million in Q2. As Alan mentioned, net revenue from NERLYNX sales was $49.3 million, a slight increase from net sales of $48.8 million in the second quarter of 2020. In Q3 2020, we also recognized $1.5 million in royalty revenue from our global partners. Our gross to net adjustment in Q3 was about 15.8%, an increase from the 14.4% gross to net adjustment in Q2. The increase was driven mostly by higher rebates due to our price increase in August. Cost of sales for the third quarter was $10 million, which included the amortization of milestone payments to the licensor of neratinib of approximately $2 million. Going forward, we will continue to recognize amortization of the milestone payments to the licensor for about $2 million per quarter as cost of sales. For full-year 2020, Puma anticipates that NERLYNX net sales will be in the range of $196 million to $198 million. This is slightly lower than our prior guidance of $200 million to $210 million. We also anticipate that our gross-to-net adjustment in 2020 will be between 16% and 17%. Furthermore, for the full year 2020, we continue to anticipate receiving royalties from our licensors around the world in the range of $4 million to $5 million, and potential licensing fees in the amount of $22.7 million. We recognize there is a great deal of uncertainty regarding the impact of COVID-19, and this may continue to negatively impact our sales, royalties, and license fees. Additionally, our NERLYNX net revenue expectations for Q4 2020 are in the range of $49 million to $51 million. As we have noted in prior earning calls, we tend to see a decline in NERLYNX in the fourth quarter of the year, more specifically during the Thanksgiving, Christmas, and New Year's holidays, which we believe is due to patients delaying their NERLYNX until after the holidays. We have taken this into consideration in this Q4 guidance. We anticipate that the gross-to-net in Q4 will be approximately 17% to 18%. SG&A expenses were $29.6 million in the third quarter of 2020, compared to $29.4 million and $30.9 million for Q2 and Q1 2020 respectively. SG&A expenses included noncash charges for stock-based compensation of $4.1 million for the third quarter of 2020 compared to $4.7 million each for Q2 and Q1 2020. Research and development expenses were $23.3 million in the third quarter compared to $24.7 million and $25.5 million for Q2 2020 and Q1 2020, respectively. R&D expenses included noncash charges for stock-based compensation of $3.5 million in Q3 compared to $5.9 million and $4.2 million for Q2 2020 and Q1 2020, respectively. We have received additional data from the claims administrator related to our class action lawsuit. Claims report assertive damages of approximately $50.5 million, which is larger than the amount previously estimated. We intend to challenge some of these claims and estimate the damages could be as low as $24.8 million. We increased our accrual legal reserve by $15.7 million, which impacted other income and expense. In the third quarter of 2020, Puma reported cash earned of $1.8 million compared to cash earned of $6.2 million in Q2 2020 and cash burn of $11.6 million in Q1 2020. We ended the third quarter of 2020 with $109 million in cash, cash equivalents and marketable securities. Our accounts receivables balance at September 30 was $27.1 million. Our accounts receivable terms range between 10 and 68 days while our days sales outstanding are about 45 days. We estimate that as of September 30, 2020, our distribution network maintains approximately three weeks of inventory. Overall, we continue to deploy our financial resources to focus on the advancement of neratinib through ongoing clinical trials and the commercialization of NERLYNX.

Thanks, Maximo. We continue to recognize that we need to improve NERLYNX's sales growth. And that the COVID-19 pandemic is presenting challenges to us with respect to achieving that growth. Puma senior management, in cooperation with the commercial committee and the Board of Directors, continues to remain focused on NERLYNX's revenue and sales growth in 2020 and beyond. We are continuing to adapt to the virtual commercial environment that we have needed to pivot towards due to the COVID-19 pandemic. And we are hopeful that changes to our commercial infrastructure will make a positive contribution to NERLYNX's sales growth. We look forward to updating investors on this in the future. There continues to remain a significant unmet need for women battling breast cancer. We at Puma are committed and passionate about finding more effective ways to help these patients during their journey. And we will continue to strive to achieve that goal. This concludes today's presentation. We will now turn the floor back to the operator for Q&A.

Thank you. At this time, we'll be conducting a question-and-answer session. Our first question comes from Ed White with H.C. Wainwright & Company. Please state your question.

Good evening. Thanks for taking my question. So maybe the first question would just be, perhaps I didn't hear it and you said it. But on the exon 18 mutations, can you just go over that again with the – is it you're enrolling the 30-patient in the cohort now? And when would we expect to see data from that cohort?

Yes, hi Ed. So in terms of the EGFR exon 18 mutations, this is part of the SUMMIT trial. So, the first value we had to hit was one out of seven; in the next one, we had to hit with four out of 18. So as you can see, out of 11, we had four. So we hit the benchmark to continue enrollment. So the enrollment will be continuing. So it will be the current 11 plus additional. And we've been very pleased with the enrollment. I mean, if you look at clinicaltrials.gov, I think we've got somewhere in the neighborhood ballpark of 45 to 55 sites in the study. These 11 patients were probably enrolled from less than 10 of them. So since we've got the data, we're going out to the other sites and making them aware of this data, because obviously knowing that it's active, you're going to be more interested in enrolling patients. And that has definitely helped with the enrollment in the study. So you've got a number of lung cancer-specific conferences you're in the first half of next year like in Q1 and SUMMIT Q2 as well. So we'll continue to present updates to that during that time. So I would envision both Q1 and Q2, you could see updates to this data, and that should be certainly north of the 11 patients. I can't speculate as to exactly how many we would have efficacy data on, but as we approach, I'll be happy to provide more transparency on that.

Okay. Thanks, Alan. Yes, I was trying to think about timing to path to submission. So I don’t know if you have any thoughts on that at this time?

Obviously, we can't speculate on that. And so we've had a meeting with the FDA, which we're planning to do sometime next year. But – and obviously it will be enrollment dependent as well. But again, I've been very pleased that as we go out to the sites in SUMMIT and present this data, the first response we're hearing from people is, I've got a patient I'm treating and what either when they progress or, I'm going to call them up and bring them in and talk to them about this. So we're definitely getting the right feedback that I would like to see, which is them trying to pull patients in for this. I just can't speculate as to what that number is just yet.

Okay. And that pre-NDA meeting for SUMMIT that you're expecting, that's still in the first quarter or second quarter of next year?

For the exon 18 cohort, we haven't scheduled a meeting yet. So I don't know when that would be. For the HR-positive breast cohorts, assuming we complete enrollment in the first half of 2021, which that cohort has been picking up very nicely in terms of enrollment. I would imagine in that ballpark first half of 2021 would be when we would be having the pre-NDA meeting.

That's the one I was talking about. Sorry about that.

Yes, sure. No problem.

And perhaps you could just talk about sales in Europe and royalties there. It seems like they're going through the same thing that we're going through here in the U.S. as far as the pandemic and lockdowns and everything. But if you have any insight on how sales are looking there in the various launches that you have ongoing, like your partners have ongoing.

Yes. Absolutely. So, our partner in Europe is Pierre Fabre. And they've been a really great partner to us. It's been a great relationship. What's different about launching in Europe versus the U.S. is, when you launch in the United States, you launch in all 50 states at the same time. Whereas in Europe, you have to wait for reimbursement for each individual country. So I believe it's 32 countries in Europe, kind of launched them one by one. So it's a little more protracted. So we haven't launched in all of the European countries, I believe we only launched in like four or five of them. And so far we've been seeing good sequential growth. Now you're correct, that they are going through lockdowns, et cetera. I don't know what impact that's going to have, but they're continuing throughout 2021 to launch in a lot of new countries. So you're going to have that as a source of growth as well, which is new launches in new countries, and Pierre Fabre has got a really great lineup of new countries that are launching in 2021. So I'm optimistic on them in terms of their execution, but I'm also optimistic on their growth in the new countries as well as the existing.

Thanks Alan. And perhaps the last question for me is just on SG&A expenses. So with the virtual sales model that you're using now combined with whatever meetings you can get in person. I'm just wondering how we can think about the sales expenses going forward? And how that's impacting? It would seem that I've been hearing that some companies are cutting back on their salesforce as they move to a more virtual model. And just want to get your thoughts on expenses or what can be done to become leaner on the sales side? Thank you.

Yes, Jeff. Do you want to help with that?

Yes. No question. I think it's a very good question. And certainly, as I mentioned up front, we're working very hard to be do have the field force operate in a much more effective way in the virtual environment. As part of that virtual environment, we are certainly seeing expenses SG&A come down. When you have a lack in travel, live engagements. So we are seeing those expenses come down. In addition, we're being very smart about head count and making sure we're very smart with ensuring that we've got the proper number of FTEs out there. We have some decline in FTEs and we're being very diligent as we think about filling those FTEs, thinking about that new future model. So we do expect to see continued efficiencies in the SG&A line going forward for sure.

And Ed, I would also just add to this. Look, one of the big costs you would get from a salesforce obviously is travel, right? Because, you're going to have a salesforce, is going to have a territory that might span over three states or something. So they're going to be driving and flying, etc. Clearly with a reduction in the number of in-person visits that you can do, that travel expenses a lot lower. And I would love to be able to tell you that I think things are all of a sudden going to turn around and we're going to be able to start doing more in-person meetings live. I just don't think that's going to happen for a long period of time. So I would imagine, because of that, you're likely to see the SG&A levels continue to be low and not see a huge uptick in travel-related expenses.

Great. Thanks for taking my questions.

Our next question comes from Yigal Nochomovitz with Citi. Please state your question.

Hi, this is Samantha on for Yigal. Thanks very much for taking the question. Just first on the non-small cell lung cancer, EGFR exon 18 data that the two patients that did not have confirmed PR. So just wanted to clarify, are those able to be confirmed, or are those two patients now off study?

That is a good question. I don't know the answer to that off the top of my head. I will need to come back to you on that.

Okay. Okay. Understood. And then just as you're enrolling the – up to the 30 patients, I think you said in this cohort, and you're moving towards the pre-NDA meeting with the FDA to look at the accelerated approval. Is it your understanding that the SUMMIT trial in those 30 patients will be sufficient to support an accelerated approval? Or do you anticipate having to run an additional cohort or an additional trial?

I obviously can't speculate until we meet with the FDA. I would not imagine we would have to run a separate trial. If the FDA wanted us to have 50 patients instead of 30, we can just continue enrollment in the current cohorts. When we met with them regarding the SUMMIT trial, which was last year, we discussed with them both the breast trial, the breast cohort, and the surgical cohorts. They didn't ask us to run a new trial. They just asked us to kind of continue enrolling the existing trial. So I wouldn't imagine having to go set up a completely new trial. My anticipation would be again we meet with the FDA, but based on our previous, my anticipation would just be to continue to enroll in the existing one.

Okay, got it. That's helpful. And then just switching to NERLYNX sales a bit, just curious when you talk about how you're going to work to increase growth in sales, where's the focus for your salesforce? Is that on the extended adjuvant indication or is that on the metastatic indication and what can you do between the two of these to increase growth? Is it the same plan or do you have separate priorities there?

Jeff, you want to handle that?

Yes. Happy to know, very good question. And let me just say, we obviously launched NERLYNX in metastatic in the first quarter of 2020. Obviously, we launched along with several other competitors. We do believe that NERLYNX will play a significant role in the metastatic setting. But obviously, it's going to take some time to determine the sequencing of drugs given the new entrance. We do know that in the metastatic setting, unfortunately, patients do progress. So what's going to be – it's going to take us to understand how that sequencing progresses, but obviously patients will ultimately progress through multiple therapies. Our real focus and what we'd like to see is to prevent patients or give them a better chance of preventing them from becoming metastatic. And so our focus is largely in the extended adjunct setting. And given that you asked a very good question, what are we doing to accelerate growth in the extended adjuvant setting? The marketing and sales team are working very hard to reposition the brand, tighten up that focus and execution, and adjust resource allocation to better align with the current market conditions. As Alan mentioned, I mentioned, we are excited about the new publication of the ExteNET final efficacy results. If you look at those results, what that showed was exploratory analysis focused really in higher-risk patients. And those high-risk patients that were reported were those that were HER2-positive, HR-positive less than one year with no PCR. And in that population, the author is described an absolute IDFS or invasive disease-free survival benefit of 7.4% at five years, and an absolute overall survival benefit of 9.1% at eight years. In addition, there were fewer CNS reported events in the NERLYNX arm. So when you think about that higher-risk population, we are very happy with the results that we have seen there. And we believe that using that information, we now have a much more compelling message for clinicians to focus in on both clinically, as well as what the control data being published to also help the tolerability side of the drug as well. And as you look at the broader population, we think NERLYNX can play a very important role in a broader HER2-positive population. But even in this high-risk population, there are very, very significant opportunities for growth. We have just now in the last couple of weeks begun speaking and focused on that population. And the early feedback from clinicians has been positive. It's early, but it's been very positive. So I hope that helps.

Yes, thank you. I appreciate all the color.

Thank you. Our next question comes from Kennen MacKay with RBC Capital Markets. Please state your question.

Hi, thanks for taking the question. Can you maybe talk to how new patient starts trended in Q3 versus Q1 and Q2 or trends in new to brand or new prescriptions? Obviously, I saw the analysis of bottles sold and the present of new patient starts at the lower, just wondering again how new prescriptions trended versus retail. Thanks so much.

Yes, thanks, Kennen. New patient starts trended down in Q3. Obviously, that was impacted by the pandemic. We obviously saw this in office dispensing as well as we were certainly hearing fewer patients coming through the in-office, the places that we have the in-office dispensing as well. So I think the trend was somewhere in the range of five-ish percent with the decline in new patient starts quarter-over-quarter.

Got it. Thanks a lot.

Thank you. Our next question comes from Laura Christianson with Cowen and Company. Please state your question.

Hi, thanks for taking my question. I guess just to follow up on the previous one. There are some oral oncology drugs that have been seeing resilience, if not strength during COVID. I was wondering if you could just give us a little bit more information about the market that you're serving and why the COVID reaction might be different there, whether they need to be in person to start on drug or do any lab work, anything that might explain the different things?

Laura, that's a very good question. And let me address that. And Alan can weigh in. So let me just stress that NERLYNX is a very promotionally sensitive product. And as discussed previously, COVID has caused a reduction in our overall interactions with healthcare providers, which we believe has led to some softening in demand. But let me be clear. We're not waiting for COVID to go away in order to change these trends. The team has been working very hard to reposition our brand, obviously tighten up our focus and execution. And as I just mentioned, we recently now have brand new data from ExteNET and control published in peer review journals. And as you think about this, clinicians and patients make decisions on the risk benefit of those medications. We believe now with that new information, our messages are much more compelling, both from the clinical benefit side, as well as the tolerability side for NERLYNX. As I mentioned, that data has just now come into our hands in the last couple of weeks, and the team is really focused in on that. And in those patient groups, we feel very good about being able to make a positive impact moving forward, and early interactions with KOLs have been positive.

Perfect. That's helpful. Thanks.

Our next question comes from Geoff Meacham with Bank of America. Please state your question.

Good afternoon. This is Jason on for Geoff. Thank you so much for taking the question and congratulations on the results. In talking a little bit about driving growth, what do you think are the biggest near-term drivers in terms of likelihood and the overall, I guess, ability to kind of move the needle? And then if you could – could you discuss a little bit about the gross to net trends moving forward and kind of the ability to drive sales with price increases and what that looks like. Thanks so much.

Okay. So Jeff, if you want to handle the first part of that, and then Maximo can weigh on the gross-to-net.

Yes. Jason, good question. And I go back to, I don't want to repeat myself too much, but I would say we are in terms of near-term growth opportunities. To us, it really is about focusing in on the new data that we have. We firmly believe that NERLYNX has a positive impact in a very broad patient population. So we feel good about those opportunities. But more specifically, when you look at the recent data that was just published in those higher-risk patient populations, the data on IDFS, OS, and CNS is very, very positive. So our focus with the team is to look at those higher-risk patient populations. And those patients are the ones as you know, that do progress that have more events more quickly. So having an active agent, you would expect to see a separation again, more quickly. And that's what we saw in the data. I also want to stress that we feel good about NERLYNX in a broader population, but even in that higher-risk patient population, there are significant opportunities to grow this brand, not only in terms of patient penetration but also in length of therapy. And the control data helps us with the length of therapy, and the clinical data helps us with the penetration of overall patients. And Maximo, do you want to weigh in on the gross-to-net please.

Yes. So our gross-to-net, as I mentioned before, our expectation for Q4 is somewhere in the range between 17% and 18%. Quarter-over-quarter, we're going up a little bit of 15.8% in Q3, from 14.4%; that is driven by the pricing increase that we took in Q. So we expect that trend to stay around that. Now also, you have to remember in Q1, we usually reflect a higher gross-to-net to copays on and so on. So we will come up with that at the end of the year.

Great. Thank you so much for the color. Really appreciate it.

Our next question comes from Paul Choi with Goldman Sachs. Please state your question.

Hi, this is [indiscernible] on for Paul. First, I was hoping you could talk a little bit more about how you think about the clinical bar in exon 18, non-small cell lung cancer and how you're going to approach that conversation with the FDA?

Yes, well, look, as you mentioned during the slide presentation, the only drug that is currently approved in lung cancer has the exon 18 mutations and its label is afatinib, which is zero drift. So, the data on that is pretty well published in terms of what it looks like. And again, we're focusing on the patients who've already been treated with an EGFR TKI. So in that population, the bar appears to be a 10.5% response rate. So we're right now at a 40% response rate, which is really encouraging. Obviously as we get more data, we'll see where that goes. It could stay the same because they're down or could go up. We just have to wait and see. If we continue to maintain the same type of effect where we're seeing a large magnitude of difference from afatinib in response rate, we're continuing to see an encouraging duration of response in PFS. I would feel very comfortable having that conversation with the FDA.

Okay, great. That's helpful. And then I think you mentioned that exon 18 represents about 5% of the EGFR mutations, but to what extent is it identified and diagnosed in patients? Is that part of the normal screening process?

Yes. In lung cancer, we're very fortunate because everybody is getting screened. I recognize in some tumor types the screening rates are very low. In lung cancer, from what we have seen, 100% of these patients get screened. So all of the screens pick up the specific EGFR mutation. So they know if it's like an exon 20 insertion, Del19 deletion, a T790M, an L-858, they know exactly what it is. So it's already picked up in the current screens that are out there for lung cancer.

Great. That's helpful. Thank you.

Ladies and gentlemen, that's the end of our question-and-answer session. I'll turn it back to management for closing remarks.

Thank you for your interest in Puma Biotechnology. As a reminder, this call may be accessed via replay of the webcast at pumabiotechnology.com beginning later today. Have a good evening.

This concludes today's conference. All parties may disconnect. Have a good day.