BioCryst Pharmaceuticals, Inc. (BCRX) CEO Jon Stonehouse on Q4 2021 Results - Earnings Call Transcript

Feb. 23, 2022 12:06 PM ETBioCryst Pharmaceuticals, Inc. (BCRX)1 Comment1 Like
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BioCryst Pharmaceuticals, Inc. (NASDAQ:BCRX) Q4 2021 Results Conference Call February 23, 2022 8:30 AM ET

Company Participants

John Bluth - SVP, IR and Corporate Communications

Jon Stonehouse - Chief Executive Officer

Anthony Doyle - Chief Financial Officer

Charlie Gayer - Chief Commercial Officer

Dr. Helen Thackray - Chief R&D Officer

Conference Call Participants

Ken Cacciatore - Cowen and Company

Tazeen Ahmad - Bank of America

Jessica Fye - JPMorgan

Chris Raymond - Piper Sandler

Liisa Bayko - Evercore ISI

Brian Abrahams - RBC Capital Markets

Jon Wolleben - JMP Securities

Justin Kim - Oppenheimer

Operator

Good day, everyone, and thank you for standing by. Welcome to the BioCryst Fourth Quarter 2021 Earnings Call. [Operator Instructions] As a reminder, this conference call is being recorded.

It is now my pleasure to hand the conference over to Mr. John Bluth with BioCryst. Please proceed.

John Bluth

Thanks, Brian. Good morning, and welcome to BioCryst's Fourth Quarter 2021 Corporate Update and Financial Results Conference Call.

Today's press release and accompanying slides are available on our website. Participating with me today are CEO, Jon Stonehouse; CFO, Anthony Doyle; Chief Commercial Officer, Charlie Gayer; and Chief R&D Officer, Dr. Helen Thackray. Following our remarks, we will answer your questions.

Before we begin, please note that today's conference call will contain forward-looking statements, including those statements regarding future results, unaudited and forward-looking financial information as well as the company's future performance and/or achievements. These statements are subject to known and unknown risks and uncertainties, which may cause our actual results, performance or achievements to be materially different from any future results or performance expressed or implied in this presentation. You should not place undue reliance on these forward-looking statements.

For additional information, including a detailed discussion of our risk factors, please refer to the company's documents filed with the Securities and Exchange Commission, which can be accessed on our website.

I'd now like to turn the call over to Jon Stonehouse.

Jon Stonehouse

Thanks, John. 2021 was a great success for BioCryst as we took a big step forward toward our goal of building the next great biotech company. The launch of our first oral drug for rare disease patients suffering from HAE, ORLADEYO, got off to a tremendous start. With $122.6 million of net revenue in the first year, we have a solid base to build off. That led us to confidently guide you to no less than $250 million this year and $1 billion in global peak sales. Patients want an oral therapy, and we are on our way to becoming the market leader in the prophylactic treatment of HAE.

But ORLADEYO is just the beginning. In 2021, we also advanced our pipeline that will lead to significant additional value creation. Our oral Factor D inhibitor, BCX9930, moved from a Phase I in 1 indication to pivotal studies in PNH and a proof-of-concept study in 3 renal indications.

What's important to note here is not only do we have a late-stage program on the heels of the approval and launch of ORLADEYO, but this molecule has the potential to be an entire pipeline. Imagine having filings for major approvals, additional pivotal programs and many proof-of-concept studies in many different rare diseases. That's what we have with 9930, and we're allocating our capital into this program to compound value for years to come.

And finally, late last year, we brought in significant additional capital that gives us the ability to retain the rights of these programs and create greater value for our shareholders.

So 2022 is another year focused on executing our plan, continuing to grow ORLADEYO in the U.S. and around the world and advancing our pipeline, enrolling pivotal and proof-of-concept studies, all to increase in compound value. It is an exciting time at BioCryst.

Now I'll turn the call over to Charlie for more details on the ORLADEYO launch.

Charlie Gayer

Thanks, Jon. The great results from 2021 give us confidence in our guidance of more than doubling sales in 2022. We already have a sizable base of patients entering the year, and recent market research shows that physicians expect to double ORLADEYO use among their current HAE patients over the next 12 months.

The 60 physicians in this survey are representative of the market, treating about 7 patients each, and they expect ORLADEYO to become the market leader. This survey is different from the type of research we presented before launch because physicians are now reflecting on real-world clinical experience rather than reacting to a written product profile. That real-world experience means their current expectations are likely to be more accurate in predicting future market share.

This recent research also matches the trends we are seeing in the detailed data on prescriptions, patient demographics and retention that we get from our specialty pharmacy partner. We saw strong and consistent new patient starts in each quarter of 2021, matched by a consistently expanding and deepening prescriber base.

The source of patients was also consistent in each quarter of last year, with more than half switching from other prophy therapies, mostly injectable therapies like Takhzyro and Haegarda and patients are staying on ORLADEYO at high rates, regardless of their prior therapy. We ended 2021 with an overall patient retention rate of 70%, with patients switching from injectable prophy having particularly strong retention.

For example, of the patients where we have enough history to track, nearly 80% of Takhzyro patients remained on therapy for at least 6 months. This level of retention shows ORLADEYO is working well for most patients, which is consistent with switching data from our APeX-S study that we presented in November at the college meeting.

We also entered 2022 with broad coverage for ORLADEYO. All major payers and PBM now have policies, which means that at least 80% of the HAE population in the U.S. has access to ORLADEYO coverage.

The strong underlying fundamentals give us confidence that sales will be no less than $250 million for the year, with Q1 being the outlier in quarter-to-quarter growth. We expect little to no Q1 revenue growth over Q4.

There are 3 reasons for this, all of which you would expect with a specialty drug and were built into our 2022 guidance. First, many plans require reauthorization at the start of the year for specialty products like ORLADEYO, meaning some patients will temporarily shift to free product. Second, the impact of commercial co-pay assistance and Medicare Part D cost sharing will reduce average selling price in the quarter. And finally, our last major PBM contract went into effect in January, but most of the revenue benefits will be realized in future quarters as participating plans implement the policy and existing patients shift from free product to paid product.

Based on the strong 2021 results, the favorable patient trends, positive HAE treater reactions, we expect ORLADEYO to reach $1 billion in peak global sales. The math to get there is both simple and achievable. Between 25% and 30% market share among diagnosed and treated HAE patients in the U.S., gets us to 2,000 patients and up to $800 million in sales, assuming a 15% to 20% gross to net adjustment. The U.S. will again account for the great majority of sales this year, but ORLADEYO has already launched in 7 other countries, and we expect several more regulatory approvals and launches this year. By the time we reach peak annual sales, we expect the rest of the world for at least $200 million annually.

As we see more and more clinical trial and real-world evidence of how well ORLADEYO works for most patients, as we see, we are helping patients get access to treatment. As we see how much need there is for an oral once-daily therapy around the world, our goal is to get all HAE patients and their doctors asking, why wouldn't you try ORLADEYO?

Helen, I'll pass it over to you.

Dr. Helen Thackray

That's absolutely right, Charlie. We've got more abstracts at Quad AI this weekend, sharing the continuing evidence coming in for how ORLADEYO helps patients. That effect is durable.

What we're seeing is that patients staying on ORLADEYO responds really well. They have fewer attacks, they feel better and their quality of life improved. We see this in the real-world evidence of the 96-week data set from both APeX-2, the pivotal study, and APeX-S, the long-term study. That 86% reduction in attack rate from baseline observed in the long-term treatment group is an example of this significant and durable effect with a once-daily oral medicine. It's exciting to see the difference ORLADEYO is making in the lives of HAE patients.

Now I'd like to turn to what's next for us. Our pipeline is advancing rapidly, and we're preparing for the steps to come. This is such an exciting and busy time for us. The lead molecule in our pipeline is, of course, BCX9930, our oral twice-daily Factor D inhibitor, which is being evaluated for the treatment of PNH and 2 global pivotal trials.

These trials are enrolling even as we are expanding to more countries and sites to reach full swing. The pivotal program is proceeding very well. What comes next, and we are starting to prepare for this, is filing for registration with the pivotal data set. We expect to be pursuing registration in multiple countries. And one strength of our program is the robust controlled data that the trial reads are designed to provide in both patients naive to prior therapy and those with an inadequate response to C5 inhibitors.

This broad controlled data set is designed to give us information on not only the key outcomes, such as our primary endpoint of change from baseline in hemoglobin and our secondary endpoint of transfusion rate, but also the patient reported outcomes, such as the FACIT-Fatigue score. We anticipate this information may be highly supportive of moving to registration in the U.S., Europe and other regions.

Remember, that was the case with ORLADEYO. We went through the registration process in 3 regions simultaneously with a single pivotal data set. With BCX9930, we expect to be in a position to move broadly in this program as well to register in the U.S. and beyond with this pivotal data.

So when we talk about our goals, for the Factor D inhibitor in PNH, we are talking about enrolling these pivotal trials, achieving the top line readout in both and initiating work towards submitting for global registration And that's where we plan to be by the end of 2023.

In parallel, our basket study of nephritis indications is also open and screening patients in multiple countries. There remains a clear need for better therapies to improve outcomes in these 3 indications, C3 glomerulopathy, IgA nephropathy and primary membrane nephropathy. It's also clear the complement alternative pathway dysregulation has a crucial role in these diseases, making them logical indications to pursue next in our Factor D inhibitor program. And yesterday, we announced the enrollment of the first patient in that study, which is a big step forward as well.

As a reminder, this study will enroll up to 14 individuals in each of these diseases to confirm proof-of-concept. Depending on the size of the vaccine, we may not need that many patients to have confidence in proceeding into a pivotal trial. So what we are preparing for is that we enroll these patients and at some point, perhaps with fewer than 14 patients in the cohort, we achieve that confidence and move forward to pivotal trials for each disease one at a time. We anticipate we'll be rolling out 3 pivotal trials in these 3 diseases by the end of 2023 as well.

These may each advance at a different pace. And because they are not dependent on each other to progress to pivotal stage, the pivotal trials can proceed as each one gets to proof-of-concept.

And this is just the start. There are multiple other diseases where the alternative pathway of complement is crucial to the pathophysiology of the disease and where proximal inhibition of the alternative pathway with a potent and specific Factor D inhibitor could be expected to improve clinical outcomes for patients.

We are preparing to add indications in the clinic to the ones we're evaluating in trial so far. So you can expect there will be other studies in preparation, building on what we already know to assess our oral Factor D inhibitor for treatment of a number of these other diseases.

Think of it as a second wave of studies coming behind what you see now. Another way to think about it is like this. We completed the pivotal trial, the global registration and then the launch and global expansion for ORLADEYO. Now we have 2 pivotal studies in PNH with our next pipeline molecule and proof of concept trial in 3 more renal indications.

By the end of 2023, we plan to be moving towards submitting for registration for PNH. We anticipate having additional pivotal trials getting underway in the 3 renal indications. And we expect to have proof-of-concept trials advancing in a whole new set of indications. This is the pipeline in a molecule that is our Factor D inhibitor program with BCX9930.

We are investing in the trials and the planning for this Factor D inhibitor program, as I've mentioned here. And we're also investing in the rest of our pipeline, including our FOP program with the ALK2 inhibitor, BCX9250, our third molecule and program currently in the clinic and moving along, and our pipeline is really strong. There is more waiting to be unveiled from our discovery center in Birmingham.

Beyond the progress we're making in the clinic with the molecules I discussed today and in the meantime, our discovery team is continuing to identify and develop new molecules for additional targets. There is so much more to come.

With the revenue from ORLADEYO and with capital, we are investing, building our programs and expanding our pipeline to bring multiple medications to patients and an increasing set of diseases. This is expansion. This is bringing our ability to develop and deliver drugs to patients to a whole new level.

I hope you can hear in my voice, I'm excited with what we're doing now and what's ahead of us. We are very focused on advancing new ways of reducing the burden of disease for patients. And I'm proud of the work our teams are doing to drive our pipeline forward with both the programs in the clinic and the programs still to come.

I'll now turn the call to Anthony.

Anthony Doyle

Thanks, Helen. Our capital allocation strategy has always been to invest in those areas that can provide significant long-term value. We did it with ORLADEYO, investing early off the back of very robust market research. And we firmly believe that this early investment has been a key factor in our early success.

With the Factor D program, given what you just heard from Helen, there's even greater potential given the multiple indications that we could go into with this pipeline in a molecule. You can find our detailed fourth quarter financials in today's earnings press release, and I'd like to call your attention to a few items.

Revenue for the quarter was $47.2 million, of which $46.2 million came from net sales of ORLADEYO. Operating expenses, not including noncash stock compensation for the quarter, was $90.8 million. And earnings per share for the quarter was negative $0.10 for Q4. This was impacted by a positive onetime noncash adjustment of $56 million related to the extinguishment of the nonrecourse pharma notes. Excluding this adjustment, on a non-GAAP basis, our operational EPS was negative $0.40 for the quarter.

Following the royalty and equity deals that we secured with our [P&L] move in Q4, we ended the year with about $518 million in cash on hand. And as we previously described, we have also agreed with Athyrium to draw down the additional $75 million debt tranche midyear this year.

Additionally, we have ORLADEYO revenue growing from $122.6 million last year to no less than $250 million this year and onward to a peak of $1 billion. For operating expenses, we're providing a range of $440 million to $480 million for full year 2022. Having ended the Q4 of '21 with a quarterly OpEx run rate of around $91 million, the great majority of the additional investment is allocated to the progression of our Factor D program. Helen clearly articulated what this investment will get us between now and the end of 2023, and why we are so excited in investing and developing this program.

We're often asked about the path to profitability. With our belief in ORLADEYO being a $1 billion drug, I feel very confident that we'll get there. In fact, given 2021 revenues, ORLADEYO was already profitable on a direct contribution basis, which is a great achievement by the team.

Right now though our strategy is investing in maximizing value creation, allocating capital to continue to enhance and expand the ORLADEYO launch, to advance our Factor D pipeline across multiple indications, all while continuing to discover new drugs to ensure that we have a robust pipeline to repeat the process over and over again.

This is the strategy that gives us the belief that we will be the next great biotech and will result in compounding value for the company and for shareholders in the coming years.

With that, we'll open it up for questions.

Question-and-Answer Session

Operator

[Operator Instructions] Our first question will come from the line of Ken Cacciatore with Cowen and Company.

Ken Cacciatore

Congratulations on all the progress. On the retention rates, it's really been a nice positives. And as you've described, probably better than we originally anticipated. But wondering as we go through having more experience, are there best practices that could even further improve the retention rates? So learnings from the clinicians and kind of passing along to sales force and sharing with other clinicians, would like to hear about that.

On the renal basket study, obviously, given the timing of enrollment, I hate to push you on this, but it does look like it's possible you could have data by the end of this year. I just want to talk about maybe timing of when we might be able to see something from those studies? And then, just lastly, any kind of qualitative discussion you can give on the enrollment in PNH kind of what you're seeing and how is it going?

Jon Stonehouse

Charlie, do you want to take the first one on retention, what we're working on? And then Helen can take the other two.

Charlie Gayer

Sure. Ken, thanks for the question. Yes, retention, really the best practice that we're seeing is that -- and this is true for any HAE prophy therapy is that patients really need to be prepared to give a drug a chance in the first few months. And we need to set the expectations so that, number one, for patients who do have GI effects that they anticipate that and know that those GI effects tend to go away within the first month or so. That if you have a breakthrough attack -- breakthrough attacks are common on all therapies, so just to work through that.

And what we see -- what we hear from the expert treaters is every new drug needs to be given about a 3-month-plus chance to see how it's doing for you. So we're really focused on setting those expectations, making sure that we do everything we can to hold patients' hands through that process. And that the HCPs, the doctors and their staff really set the patients up for success and prepare them for anything that might happen. And we'll keep focusing on that throughout this year to keep up that high retention rate and hopefully even improve it.

Jon Stonehouse

Yes. One thing before Helen answers the other part of your question. One thing that Charlie and team are doing a really good job is gathering more data and more information about good switches and challenging switches and the like, whether it's our product or other products. And so we're getting smarter, Ken, with each month that goes by. And we're applying what we're learning from that to improve those numbers if we're able. Helen?

Dr.Helen Thackray

Yes. So thanks, Ken, for the questions. On the renal study, in terms of timing, so this is a study that, as I said, has 3 different cohorts. They are each independent, and they will, therefore, enroll independently.

We are pursuing this based on science. We expect to see outcomes that we anticipate will lead us to proof of concept into the pivotal trial programs. They will -- as I said, though, they will each go independently, and we're also making sure that we get the right patients so that we can assess for efficacy for that proof-of-concept in this study.

So when I say that, I mean that we are doing kidney biopsies at the beginning for entry in order to confirm this in patients with active disease is at the right stage, not too advanced to be able to assess. And we expect this to take some time. So we have not -- we've not said which of these we expect to go faster or slower, but over time, we think we will see these arms enroll separately. And we're looking for that target of achieving proof-of-concept to advance to pivotal programs for all 3 within the time frame by the end of 2023.

On the second question, which was what we're seeing in enrollments for PNH, we're really very pleased with what we're seeing. We're seeing activation of sites across the globe and enrollments in both studies, as you've heard. So we're right where we want to be with this program and ramping up to add more centers and be on course with this.

So I don't have more color to give on that, except that we're really very happy with the progress and the excitement that we're seeing from investigators and centers around the globe on both of the trials.

Operator

Our next question will come from the line of Tazeen Ahmad with Bank of America.

Tazeen Ahmad

For ORLADEYO, for your comments about Q1 sales, I just wanted to clarify, beyond your statement in your press release where you said that you expect little to no growth in revenues this quarter due to these formulary resets, could sales be lower sequentially from 4Q?

This is a common phenomenon that a number of our commercial stage companies experience, and I'm just asking for the extra color to help with modeling purposes. And related to that, what should we expect gross to net to be in this quarter? And then I have a follow-up on PNH.

Charlie Gayer

Sure, Tazeen. Yes, you've got -- this is a common phenomenon. It's really just a reimbursement dynamic in Q1. So we expect the quarter -- from Q4 to Q1, this will be the lowest growth. But then we're very confident and very excited about the 250 million plus for the year. So higher growth in future quarters. So it's really just a Q1 expected reimbursement headwind, that, frankly, will turn into more of a tailwind in Q2 as that new contract that I described really takes effect.

And then the big driver this year will just be the continued patient filling the funnel with new patients coming in. And what we see in all of our research and all of the feedback from the field is we've got a lot of opportunity in front of us there.

Tazeen Ahmad

Okay. So just to clarify, you're expecting at worst flat sales, is that right, for the quarter?

Charlie Gayer

Yes. So little to no growth. So at worst is no growth, but it will be the lowest -- we expect it to be the lowest growing quarter-to-quarter for the year.

Anthony Doyle

Tazeen, on your question about the gross to net, yes, I mean, there will be a spike, right? Charlie has talked about the reauthorization. And so the free product that we give to make sure that patients have no break in treatment, combined with effects that we'll have from things like co-pay assistance, will cause the spike. And really, that's what's going to drive -- despite the fact that we'll have strong fundamentals that there will be kind of a temporary adjustment to revenue in Q1.

Tazeen Ahmad

Yes. So you've always talked about that 15% to 20% range for gross to net. Would it be slightly higher than that this quarter or still within that range?

Anthony Doyle

Yes. I think the 15% to 20% that we talked about is on those reimbursed. So when you factor in the free product, yes, it will absolutely be higher than that.

Tazeen Ahmad

Okay.

Anthony Doyle

And then when you look at only the reimbursed, it may well be a small blip, but again, it would be driven predominantly then by co-pay assistance.

Jon Stonehouse

And again, this is very typical of specialty products during the first quarter.

Tazeen Ahmad

Sure. And then on PNH, you've said that you'll finish enrolling 9930, have a data readout and prep for approval all within 2 years. When do you think you'll be able to provide additional nuance as to when each of those events could occur?

And then on the competitive landscape, I believe this year Novartis will read out 1 of its Phase III studies for C5 failures head-to-head versus SOLIRIS. And then also Astra will have combo data for their candidate in refractory patients also at year-end.

And I'm just wondering, would you see any read-through from these studies to the 9930 program? And if you weren't first to market with an oral PNH drug, do you think that there will need to be meaningful differentiation among the different products?

Jon Stonehouse

So Helen, maybe I'll take the first question. And if you could take the middle one and then Charlie, maybe the last one in terms of market.

So it's really hard to give you blow-by-blow on the enrollment because it changes every week, right? And so I think our goal is to tell you when we'll give you a backstop of what you'll see at the end of next year. And then as we learn more over the course of the year, we'll make a decision on do we update you or not. But I think we want to focus you on the end of next year and where we'll be as a priority.

And then, Helen, do you want to take the middle one?

Dr.Helen Thackray

Yes, sure. So in terms of read-through from other programs, I think what we're seeing is very interesting, complement mediated disease field is rapidly advancing. We're recognizing the complement is implicated in diseases at an increasing pace. And so we're certainly seeing that in the field in terms of other trials and everything that we see other programs advancing. I think that's validation of the concept that the alternative pathway is implicated in these diseases and can contribute to clinical outcomes.

So for us, we'll be watching closely to see what we can learn as those programs generate data and as we see how the regulators respond to that. So we always do that, and we will always be incorporating that into our plans. And so I think we're happy to be soaking up as much information as we can and confident in our own program as it moves forward.

Jon Stonehouse

Yes. The only other thing I'd add to that is the read-through on a combo study isn't super helpful to us because we don't believe that combo therapy is a viable marketed approach. Having monotherapy is the key. And we believe we've got a drug that takes care of that, both extravascular and intravascular hemolysis. So we really don't think that combo is a winning strategy, but I'll let Charlie talk about how to compete and differentiate.

Charlie Gayer

So Tazeen, as far as competing, first of all, PNH is just -- as you've heard, it's just the first of many indications. So there's massive opportunity for this drug. And we are getting really good at switching patients from injectables to oral. So we think even if we come in second in the oral Factor D, Factor B space, that we can really compete based on being the smartest out there in terms of how to get patients to switch in PNH.

So there'll be plenty of opportunity in PNH, and then there will be plenty of opportunity in each subsequent indications. And then even just in PNH, there are areas where we can be differentiated. So we have the only program with two controlled clinical trials, and that may give us the ability to have more readable information on patient-reported outcomes, for example, that will be important in many markets, particularly outside of the U.S. So a lot of places we can compete. We've got a great team, and I'm excited about it.

Jon Stonehouse

Yes. And one last thing I'd add, Tazeen, is bigger is not better here. We're showing that in the HAE space, where we're competing against Takeda and CSL. And one of the things that we take tremendous pride in really trying to understand is the behavior that affects decision-making, both in the patient and the doctor on switching.

We're starting to see that already. We're gathering data in the PNH space with new drugs that are entering the market. And if somebody else gets ahead of us within the world and gets into the market, we're going to learn about what works and what doesn't work there as well, and we're going to apply that.

So my bet is on Charlie's team because I've seen what they've done in the HAE space, and I'm confident that they can compete against anybody in PNH.

Operator

Our next question will come from the line of Jessica Fye with JPMorgan.

Jessica Fye

First-up on OpEx. It looks like the OpEx guidance is pointing to roughly 50% growth year-over-year at the midpoint, if we exclude stock-based comp, can you talk about the growth you expect to see in SG&A versus R&D? And within each line, maybe elaborate a little bit more on what's driving that growth relative to 2021? And then second, you talked about the growth in the ORLADEYO prescriber base continuing significantly, can you put some numbers around that?

Anthony Doyle

Yes. Thanks, Jess. So first, on the OpEx. Yes, if we look at it, it's -- the investment has grown, but it's predominantly based on R&D, right? The biggest growth for Q3 to Q4 and for 2021 to 2022 is going to be to support the Factor D program.

And so when I think about the magnitude of the growth, I got to think about what Charlie was saying earlier in terms of the market opportunity, right? We're talking about a multibillion-dollar opportunity in this pipeline in a molecule. So I think the investment that we're making is perfectly in line with the strategy that we have.

The Factor D, like I said, is going to be the predominance of the growth that you're talking about. There will be G&A growth mainly to support rolling out ORLADEYO on a global basis, and then there will be some structural support to make sure from a G&A perspective that we can support this growth.

But I think with growing revenue that we have in ORLADEYO, if I think about the net cash utilization as opposed to the OpEx on a stand-alone number, the cash on hand that we have and the potential opportunity that this investment gives us, I think it's a great way to be allocating the company's capital.

Jon Stonehouse

Yes. And specifically year-over-year, I mean, think about it, you got 2 pivotal studies going on in many, many, many sites around the world. You've got a proof-of-concept study in 3 additional indications. And Helen just told you that we're working on getting up other studies and other indications, and there's prep work, there’s supply, there's toxicology, there's pharmacology. There's just a bunch of stuff when you've got pivotal and proof-of-concept programs, and the number of those programs increases over time. So that's the big difference in the specifics around driving R&D costs year-over-year.

Anthony Doyle

Yes.

Jon Stonehouse

And then with regard to the numbers on growth, we're not going to specifics on the numbers for ORLADEYO on patient starts and things like that. But Charlie can give you some color around what we're seeing.

Charlie Gayer

Yes. Just so in Q4 and just like we saw for all -- all throughout all of 2021 is we keep seeing this prescriber base getting broader, and we've talked a lot about our targeting. So we've got the Tier 1 500 doctors and then a big Tier 2 that's roughly twice, maybe a little bit larger than that, where we're really focused.

We saw growth in both of those segments in Q4 just as we had in Q3. And then the other key thing is, are we going deeper within those prescribers? So are they -- are particularly that Tier 1 doctor that is very much like the market research I talked about, are they prescribing more? The answer is yes, they are. They're prescribing more. So that's our focus to continue to go broad and go deeper.

And what we saw in our market research that I described is that both current prescribers and current non-prescribers in that research, both, they all indicated that they intend to prescribe ORLADEYO over the next 12 months. And so the indicators are there, and that's the team focus.

Jon Stonehouse

Yes. And I think another thing that's got us really excited is with the pandemic looking like it's easing up, we're seeing more face-to-face interaction. So Charlie and I, last week we're at the very first regional gatherings of our sales team. And there's a lot more opportunity, just in terms of not only the top prescribers and getting more of them to prescribe, but also looking at going deeper in the prescribing.

And so we're also looking at going to Quad AI this weekend. And face-to-face interaction, we hear there are more docs coming that were at the college meeting in November. Charlie and I and Helen will be there, and we're really excited about interacting with physicians. And that talking to each other has a real impact on the enthusiasm for prescribing. So we think that's going to get better over time, and it's a real opportunity.

Operator

Our next question will come from the line of Chris Raymond with Piper Sandler.

Nicole Gabreski

This is Nicole Gabreski on for Chris. Maybe one around just peak sales guidance. So I know you guys have said that the U.S. opportunity will make up the majority of the new $1 billion peak sales estimate. But you had indicated previously that one of the biggest benefactors on the ultimate peak revenue potential would be ex-U.S. uptake. So I guess just given this, what gives you confidence in updating global peak revenue guidance at this point? I guess, can you just help us frame your thinking here?

Jon Stonehouse

Yes. Let me start, and then I'll pass it to Charlie. Let me be really clear. The vast majority of the global peak sales, 80% roughly, will come from the U.S. and the math -- I'll let Charlie go through it again. But the math to get there, you don't have to have 50%, 60% market share to get there. It's very reasonable and very achievable.

But Charlie, you can explain more.

Charlie Gayer

Yes. I mean, again, the math is 2,000 patients in the U.S. and thinking about our pricing and gross to net that Anthony described as 15% to 20% that gets you to the 800 million. And we've said previously that ex-U.S., it's going to be more of a volume. The pricing will be lower, so it's volume. And we'll need 2 to 3 patients ex-U.S. to kind of equal 1 patient in the U.S.

But as we start to go to global markets, there's a real demand for an oral prophylaxis therapy. And the markets are transforming more towards prophylaxis as has already happened in the U.S. So I think it's the indicators from that -- the strong indicators from the U.S. are strong year 1. What we hear from future customers ex-U.S. all adds up to that confidence of $1 billion in peak global sales.

Jon Stonehouse

Yes. Just one quick add to what Charlie said that 2,000 patients is off a base of 7,500 diagnosed and treated. So that's where you get somewhere between 25% and 30% market share, which is really important.

Nicole Gabreski

Okay. That's very helpful. And then maybe -- sorry, just a follow-up around competition. Obviously, this is a ways off, but we've gotten some questions, more recently around potential competition for ORLADEYO from gene therapy and gene editing approaches. So just, I guess, thinking about your peak sales guidance, how do you guys think about these other treatment modalities potentially competing with ORLADEYO? I guess, for example, do you see them as being, I guess, maybe more restricted to certain patient subsets or something like that?

Jon Stonehouse

Yes. The first thing I'd say is that all the competition is pretty far away. So that gives Charlie, years, literally years to be able to capture market share and get those patients that will be controlled on ORLADEYO on a once-daily oral capsule. And our belief is if you're controlled on a once-daily oral capsule, then what is the incremental benefit that you're getting from other therapy that would cause you to switch, right?

And so efficacy is not going to be it. If you're controlled on our drug, you don't need any more efficacy, right? And so it's got to be something else. And so I think where gene therapy and gene editing could play a really important role is in the patients that are really hard to treat, right? With all drugs, none of these drugs are perfect. And there are patients that are still struggling. And so I think that's a great spot.

But there's -- with any new therapy, there is a risk-benefit balance that you've got to cross over. And that's what we learned when we continued to study this in the switching. So what's the incremental benefit? And it's hard for us to see if you're controlled on our drug that you're going to switch to someone else.

Operator

And our next question will come from Liisa Bayko with Evercore ISI.

Liisa Bayko

Most of have been answered, but maybe you can just elaborate a little bit more on the opportunity in renal diseases for 9930. IgA nephropathy, we've been hearing a lot about. There's just a pretty competitive area. There are a lot of compounds in development. Where do you see complement -- that inhibitors of the complement pathway, specifically Factor D or Factor B fitting into the treatment -- future treatment paradigm there with lots of treatment options? And then maybe you can go through some of the opportunity in C3G and the rest of the indications there?

Jon Stonehouse

So Helen, maybe start with why Factor D inhibitor, proximal inhibition and alternative pathway makes sense for the renal indications. Because Liisa is right, there are other products, but they're not working on kind of the root cause of the disease. And then Charlie, you might want to just talk about how we look at one of these markets in terms of opportunity.

Dr.Helen Thackray

Yes. So the prior indications in IgA nephropathy is one of these. The pathology is driven by complement deposition in glomeruli in the kidney. And so getting at that complement deposition, addressing the dysregulation of complement pathway, preventing that deposition and then preventing or improving the damage to the kidneys is getting it from the root of the basis of disease. And so that seems to be a natural, now that the complement role understood and now that there are multiple ways possibly getting at this, it seems to be a reasonable way to address that.

What we're seeing in the field is that there is benefit then through that and some of the early programs we've seen sort of proof-of-concept for the improvement of proteinuria in these diseases and that, that is an indication of the potential to improve the GFR.

And so targeting complement has shown -- has been shown to be a reasonable way to go for treatment for improving proteinuria improving outcomes. The hope -- the goal of treatment long term is to improve the longer-term outcomes, including reducing the progression to kidney failure and reducing the need for transplants in patients across each of these diseases, IgAN and C3G, as you mentioned.

So we are -- we believe that alternative pathway inhibition with a proximal inhibitor, it could be -- there are 2 ways of getting it back currently in development, Factor D approach is one of them. You think each of those could be reasonably expected to have similar clinical outcomes. We've chosen Factor D because we think it's a better target and has a structural advantage at that, but we're looking for clinical outcomes that will be, I think, similar for each of those 2 groups, and it will come down to what we want to see with the particular characteristics of the molecule and trials.

Jon Stonehouse

Yes. And I think if you hit it at the heart of the biology that causes the disease, our hope is that you see a better outcome at the end of the day. We don't know if that will be the case. That's why we're doing the research in the clinical trials. But we're going after this target specifically to hit it at the heart of the pathway. So -- and Charlie, you want to talk about the market?

Charlie Gayer

Yes. So Liisa, in the 3 indications, there's some differences. So C3G is much more in line with ultra-orphan like HAE or like PNH. This is -- there are no current treatments. This is -- for many patients, there's a high risk of mortality. So we're looking at that entire market. For IgAN and PMN, as Helen was describing, there are patients who are at higher risk -- there are segments of that market at higher risk for advancing to end-stage kidney disease. And so those will be the initial segments that we compete in, all within the orphan space, all within our skill set where we can compete with small teams and a differentiated product as a proximal inhibitor.

Jon Stonehouse

Yes. I mean the way -- the best way to think about all these things we're going after is it's like another ORLADEYO market, with each disease or bigger in some cases, right? So just add up that math and you get to real huge value.

Operator

And our next question will come from the line of Brian Abrahams with RBC Capital Markets.

Brian Abrahams

Congrats on all the progress with the launch and on the pipeline. You gave a lot of clarity on the seasonal reimbursement dynamics we should expect at the start of the year. I'm curious if we should expect any transient Omicron wave effects on early first quarter demand trends as well?

And then secondarily, can you give us a sense of how the impact on some of the recent WACC changes -- How some of those changes would impact overall gross to net for the reimbursed patients over the course of 2022? I'm just wondering how much pull-through we might expect from those pricing changes to revenues per patient?

Jon Stonehouse

Charlie, you got that one?

Charlie Gayer

Yes. So -- as far as the seasonal reimburse -- well, I think you're asking about Omicron and whether we have any impact of that? I'm not going to comment on the full quarter until we see the end of it. We're glad that Omicron seems to be on the way out here. As Jon was saying earlier, we're going to Quad AI. So there's going to be a lot more in-person visits with doctors.

So we'll see if it has any impact, but we've been working in COVID this entire time, and the team has done really well. So now that we're able to do more in-person meetings internally as well as externally. It all just becomes a tailwind and an opportunity going forward.

As far as the WACC changes, I think you're referring to the 3% price increase we took last week. And this is all part of our guidance for the year. And gross to net changes, no, I don't think this will have any impact on gross to net, the same 15% to 20% that we've talked about, just 3% higher.

Jon Stonehouse

Yes. And it doesn't affect the contracts we have with payers and stuff like that. I mean this is very common.

Operator

And our next question will come from the line of Jon Wolleben with JMP Securities.

JonWolleben

Just a couple for me on the pipeline. In the RENEW study, I'm wondering how frequently are patients coming in to measure there uPCR? We know enrollment may be different between the indications. But -- just wondering if you hard and fast want to see that 6-month uPCR? Or we could see improvements very early on that may trigger you guys to want to go to a pivotal study earlier? And then you mentioned FOP on the call. We haven't heard much about that in a while, but can you just give us a status update on what to look forward to in 2022 for FOP?

Jon Stonehouse

So Helen, do you want to take the first one? I'll take the second.

Dr.Helen Thackray

Yes. So with RENEW study, yes, the endpoint that we're looking for there is 24 weeks in terms of the uPCR. We will be assessing it regularly over the course of the trial. And as we said earlier, we'll have 14 patients -- up to 14 patients in the cohort. So we'll be looking at that.

And if we -- it's I think possible that we may see sufficient information to consider a proof-of-concept to advance with patients possibly fewer than 14 and at a time point possibly earlier than the 24 weeks. We'll just have to see in the data what we're observing, and we'll make a decision as we achieve that point.

Jon Stonehouse

And then on FOP, Jon, this program, back when we first launched it, was invested indifferently than 9930 complement program because we had less capital, honestly. And so we had to be cautious about how we invest it. So we did it serially rather than in parallel, and I'll give you an example.

While we're running a Phase I, we weren't building up the drug supply. We' weren't doing the additional tox work in parallel, which we do in other programs that we're investing for speed. And so we're in a bit of a catch-up mode this year. So drug supply and toxicology and planning for patient studies is the bulk of what's going to happen this year.

But the key in this space is there's a huge unmet medical need. This is a really difficult disease. And it's -- we've seen a lot of failure in this space. It's not easy to get to a situation where you feel like you've got a product that you can get across the finish line. We've seen a lot of companies stumble. And it's not because they aren't doing their jobs, it’s because it's hard.

So we're really excited about the data that we've seen in the Phase I study so far, both from a safety, tolerability and drug level perspective, and have a lot of confidence in 9250 and FOP. So now we are investing, and you'll hear more about this towards the end of this year and beginning of next.

Operator

And our next question will come from the line of Gena Wang with Barclays.

Our next question will come from of Justin Kim with Oppenheimer.

Justin Kim

Just a few for me. I was interested to see the strong retention among less convenient modalities like Cinryze on the Takhzyro patient group, though. Are there any insights on the dosing regimen of these patients and whether retention difference between those 2 groups? And then I have a follow-up on BCX9930.

Charlie Gayer

Yes. Justin. What we see in the U.S. is most patients are taking the every 2-week dose of Takhzyro. But I don't think it's even just about the dosing, it's really about the overall burden that injectables place on patients' lives. And refrigeration is required. It's harder to travel with these drugs. So an oral is something that's truly transformative. And I think that's why we see patients switching. And it's -- Takhzyro has been consistently the #1 prophy products switching to ORLADEYO.

Justin Kim

Okay. Great. And then on 9930, a number of peers targeting the alternative pathway have begun to set their sights on dry AMD and GA specifically. Any commentary on how suitable that indication tees up for the company looking beyond renal disease? And just on the PNH side of things, can you discuss the protocol for transfusion and hemoglobin setpoints for the naive monotherapy study?

Jon Stonehouse

Yes. So Helen, you could take the second one. I'll take the first one. We're a rare disease company, and so we're really focused on the diseases and complement that affect patients suffering from rare disease. I won't exclude that someday we may explore the eye and indications. But the challenges with those diseases, as we've seen historically, is getting the drug to get to the spot in the eye and oral delivery has been a real challenge for companies thus far and then keeping it there. And so I'm not opposed to exploring it at some point, but not the priority right now. Helen?

Dr.Helen Thackray

Yes. And if I could just clarify the question on the PNH study in the naive patients was around transfusions and what about transfusions?

Justin Kim

So what's the criteria for transfusions and sort of the hemoglobinsort of set points for that?

Jon Stonehouse

So maybe, Helen, it's around the variation of who gives transfusions and what qualifies as a transfusion, even if they don't get one if their hemoglobin is low.

Dr.Helen Thackray

Well, this is an interesting point in [dose] design and protocol where you have to choose transfusion rate as an endpoint. We give guidelines in the protocol for when to transfuse. But it is, of course, the physician’s decision on when to transfuse.

So when you look at how you assess that in the data, we then set an analysis planning, what will be the point at which we consider a patient transfused and there's a hemoglobin level at which you consider a patient to be transfused, whether or not the physician actually gave it to the patients. So that standardizes another way.

We standardize in data and the analysis and which patients we would consider to have been transfused if their hemoglobin reaches a certain well. We then also collect the data on whether they received a transmission or not, but for the endpoint perspective, it's standardized.

Jon Stonehouse

And Helen, the regulators understand the differences from different parts of -- different physicians in different parts of the world, and so they're very supportive of this approach. Is that correct?

Dr.Helen Thackray

Absolutely. Yes. This is a sort of fairly typical way to get to data that has been analyzed in the same manner across different treatment ways that individuals may treat their patients across the world. It's used and recognized by regulators.

Operator

And our final question will come from the line of Gena Wang with Barclays.

Unidentified Analyst

This is [Harshita] on for Gena. Can you hear me now?

Jon Stonehouse

Yes.

Unidentified Analyst

Okay. Great. Most of our questions have been answered, but 2 quick ones from us. For ORLADEYO growth, you've given enough color on the first quarter. But how should we think about the quarter-over-quarter growth assumption for 2022? Is it more of a linear growth? If you could provide any color there, that would be helpful.

And the second question is in the longer term, how are you thinking for BioCryst? Do you plan to be a stand-alone company? Or is the thinking there to be more of like under a big umbrella? So any guidance there or any color there would be helpful.

Jon Stonehouse

Yes. I'll attempt to answer both. Anthony and Charlie help me on the first one, if I'm getting down the wrong path. But if you've got an unusual situation in the first quarter, you shouldn't expect that it's going to be linear from that point forward. The second quarter -- first to second quarter could be higher, and then there could be some variability in the third and fourth.

So we'll continue to guide you along the way. And what we're trying to do here is to be very clear on what we think we will see in the first quarter and then what we will see for the year. And we're confident in both that we are very, very confident that no less than $250 million for the year, and that the first year for all the reasons Charlie listed is little to no growth in the quarter-to-quarter from ORLADEYO growth.

Anthony Doyle

I think it's important to highlight that that's revenue focus, right? The fundamentals in terms of getting more patients on drug will continue to grow. The events in Q1 will be centered around revenue. And like Jon said, from Q2 onwards, there I think we'll start to see it normalize in Qs 2, 3 and 4.

Jon Stonehouse

Yes. And then on your second question, I mean, we're building the next great biotech company. It's sounds hard, but that's -- it's pretty simply stated. And the reason that we have a lot of confidence in that, and we say it allowed is because we've got a drug that is going to approach or will get to $1 billion in peak revenue. And we got a really full pipeline right behind it. And all of this stuff came from our discovery engine and our platform.

And if you look at the great biotech companies, you pick your favorite one, that's exactly how they got to tremendous value, is by investing in their pipeline while they're bringing a new valuable product to the market. And we think 9930 could be significantly bigger than ORLADEYO. And that, we think, is very exciting and allows us to build the next great company.

Operator

That is all the time we have for questions for today. So now I would like to hand the conference back over to Mr. Stonehouse for any closing comments and remarks.

Jon Stonehouse

Thank you. So 2021, I've been in the company 15 years, it might be the best year we've ever had. But guess what, it's in the rearview mirror. We are focused intently on driving ORLADEYO, getting it approved in other countries, continuing to build off a great growth in the U.S. and advancing our pipeline. And we will remain laser-focused on that, so that at the end of '22, we have another year of great performance to share with you.

So thanks for your interest, and have a great day.

Operator

Thank you. Everyone, this concludes our conference call for today. You may now disconnect. Everybody, have a wonderful day.

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