Good day and thank you for standing by. Welcome to the Kiniksa Pharmaceuticals Second Quarter 2021 Financial Results Conference Call. At this time, all participants are in a listen-only mode. After the speaker presentation, there will be a question-and-answer session. [Operator Instructions]. I would now like to hand the conference over to your host, Rachel Frank. Please go ahead.

Thank you, Operator. Good morning and thank you for joining Kiniksa's call to discuss our second quarter 2021 financial results and our recent corporate and pipeline activity. A press release highlighting these results can be found on our website under the Investors & Media section. As per the agenda, our CEO, Sanj K. Patel will start with an introduction. Ross Moat, our Head of Commercial will detail our commercial launch, John Paolini, Kiniksa's Chief Medical Officer will follow with a brief pipeline update, including a review of additional data from our mavrilimumab Phase 2 clinical trials in COVID-19 related ARDS; Mark Ragosa, our Chief Financial Officer will review our second quarter 2021 financial results. And finally, Sanj will return for closing remarks and to kick-off the Q&A session for which Eben Tessari, our Chief Business Officer, will also be on the line. Before getting started, please note that we will be making forward-looking statements today that are subject to risks and uncertainties that may cause actual results to differ materially from these statements. A review of such statements and Risk Factors can be found on this slide, as well as under the caption Risk Factors contained in our SEC filings. These statements speak only as of the date of this presentation, and we undertake no obligation to update such statements except as required by law. With that, I will turn it over to Sanj.

Thanks, Rachel, and good morning, everyone. I'm incredibly excited to have the opportunity to discuss our second quarter 2021 results today, which include the first quarter of ARCALYST sales in recurrent pericarditis. We're very encouraged by our initial launch progress, and that is a direct result of focused execution by the Kiniksa team. I'm excited to report that net revenue for ARCALYST for the second quarter of 2021 was $7.7 million. While we're still in the early stages of the launch, the team continues to execute extremely well. The prelaunch work that they've done to identify the patient population provided a clear call to action for physicians to prescribe. And the team continues to identify patients and expand upon the prescribing base. All these efforts have facilitated the encouraging uptake that we've seen to-date and positions us for continued growth in the coming quarters and years. Ross will cover our commercial performance in a bit more detail. And as you'll hear, we are very pleased with the breadth of physician and patient adoption, as well as the viable reimbursement condition ahead of payers establishing coverage policy. Aside from ARCALYST, we're also focused on building maximum value across our entire portfolio. Over the last few months, we've continued to execute across our pipeline of clinical stage product candidates. In particular, in the past quarter, we were pleased to announce positive results for Mavrilimumab in the Phase 2 trial in severe COVID-19 related ARDS, as well as positive final data from the Phase 1 trial of KPL-404, which is our CD40 program. John Paolini will provide a more detailed update on the recent pipeline progress. But in essence, we believe we are well positioned for longer-term growth with ARCALYST and our pipeline assets Mavrilimumab, Vixarelimab and KPL-404 will also aid our growth. I'll now turn it over to Ross to discuss our commercial performance in more detail. Over to you, Ross.

Thank you, Sanj, and good morning. We were thrilled to have launched ARCALYST in recurrent pericarditis in quarter two of 2021, marking a revolution for Kiniksa becoming a commercial stage company, as well as establishing the third indication for ARCALYST and underscoring the utility of this interleukin-1 alpha and beta mechanism in autoinflammatory diseases. We successfully assembled the team, readied the organization and launched rapidly at the beginning of Q2 knowing the patients were in need of ARCALYST and with ARCALYST is the first and only FDA approved drug in recurrent pericarditis. We're delighted to share that our launch quarter ended in superb shape with a Q2 net revenue of $7.7 million. The sources of revenue were relatively evenly split between recurrent pericarditis, the legacy CAPS and DIRA indications and the initial channel inventory build to supply all indications. We have seen a very strong start in recurrent pericarditis, and are pleased that revenue has already caught up with and slightly surpassed the revenue of the legacy indications. This result was driven by a steady flow of new to ARCALYST patients, as well as converting patients from the RHAPSODY trial to commercial therapy. For the indications of CAPS and DIRA, I'm pleased to confirm that whilst there was some Regeneron drug in the channel in the early weeks, those patients successfully transitioned to commercial Kiniksa supply throughout the quarter, and they now receive the full support from Kiniksa OneConnect our patient services program. We ended the quarter with approximately $2.5 million of revenue -- of inventory revenue at the specialty pharmacies. This volume represents the one-off build in the launch quarter, which was required to meet the legacy CAPS and DIRA demand as well as keeping up with the new growth to recurrent pericarditis. Following this strong launch quarter results,…

Thank you, Ross, and good morning everyone. I will provide a brief overview on where we stand with our three clinical stage programs. We are encouraged by the potential broad utility of Mavrilimumab which has demonstrated positive clinical data across multiple indications, including COVID-19, related ARDS and giant cell arteritis. Our recent interactions with the FDA have resulted in defined paths our Phase 3 development of Mavrilimumab in these diseases with significant unmet need. Currently, we're focused on completing our Phase 3 trial of Mavrilimumab in COVID-19 related ARDS and generating data in the first quarter of 2022. On Vixarelimab last year, we reported that our Phase 2a study in prurigo nodularis achieved its primary efficacy endpoint with a statistically significant 50.6% reduction in weekly average Worst-Itch NRS from baseline at Week 8. There was also a disease benefit shown almost a third of Vixarelimab recipients achieved a prurigo nodularis investigators global assessment or PN-IGA score of 0 or1, which is clear or almost clear at Week 8, compared to only 7.7% of placebo recipients. Moving forward, building on those data, we are currently enrolling a global randomized placebo-controlled Phase 2b dose ranging trial in prurigo nodularis testing three different once monthly dose regiments. The primary efficacy endpoint is change in Worst Itch-NRS at Week 16. Finally, for KPL-404, in May of this year, we announced final data from our Phase 1 trial in healthy volunteers showing not only that KPL-404 was well tolerated with dose-related pharmacokinetics but also that target engagement and pharmacodynamic data were supportive of further development in patients with optionality for chronic subcutaneous as well as intravenous administration. We plan to initiate a Phase 2 proof-of-concept trial in the fourth quarter of 2021. This 12-week trial in Rheumatoid Arthritis patients is designed to provide not only…

Thanks, John. Good morning, everyone. Today I'm going to walk through our financial performance for the second quarter of 2021 and review our guidance. You can find our detailed financial information in today's press release. And I'd like to call your attention to a few items. First, ARCALYST revenues recognized upon sale to our distribution network of specialty pharmacies, and in the second quarter, revenue was $7.7 million, driven primarily by the commercial launch of ARCALYST in recurrent pericarditis, as well as continued legacy CAPS and DIRA sales upon transition to Kiniksa inventory during the quarter. Second, based upon the strong uptake in recurrent pericarditis, driven by patient demand, broad physician adoption, and a notable medical exception approval rate, we expect total third quarter 2021 ARCALYST net revenue of between $9 million and $10 million. Assuming stable CAPS and DIRA revenue and minimal if any revenue contribution from inventory changes, we believe recurrent pericarditis sales in the third quarter could represent a greater than two-fold increase over second quarter recurrent pericarditis sales. Given the variables that remain at this early stage of launch, such as continued physician adoption, patient compliance, duration of therapy, and final payer coverage policies, we're not providing longer-term ARCALYST revenue guidance at this point. Third, as a reminder with the FDA approval of ARCALYST for recurrent pericarditis, we're responsible for the sales and distribution of all approved indications in the U.S., including CAPS and DIRA and evenly split profits on sales with Regeneron. When profitable collaboration, profit-sharing will be reflected as a separate line item within our operating expenses. In the second quarter of 2021, we did not make a collaboration profit sharing payment. Lastly, net loss for the second quarter of 2021 was $41.6 million, compared to $37.5 million for the same period last year. And we ended the second quarter of 2021 with cash reserves of approximately $226 million, which we continue to expect to fund our operating plan into 2023. As you've heard from the team, we are executing on our ARCALYST commercial strategy and combined with the continued advancement of our clinical stage assets, Mavri, Vixa and KPL-404 we're well positioned to continue to help patients and to drive future growth. And with that, I'll turn the call back to Sanj for closing remarks.

Thanks Mark. At Kiniksa, we're very focused on building the maximum value across our portfolio and building a company that directly and positively impact the lives of patients. And the fact that we have multiple programs gives us tremendous amounts of optionality to allocate capital relative to our opportunities. It's clearly a very exciting time for Kiniksa. We're off to a jolly strong start with the launch of ARCALYST in recurrent pericarditis. The positive feedback we continue to receive from physicians and patients validates the unmet needs for patients with recurrent pericarditis. And with this launch, we started, as we mean to go on. And as I mentioned previously, we continue to be energized by our progress across our entire portfolio. We believe that we're well-positioned to execute throughout this year and beyond. We're encouraged by the broad utility of mavrilimumab seen today in GCA and COVID, Vixa in prurigo nodularis, and KPL's 404 potential to in a range of autoimmune diseases. Importantly, as Mark said, we're well capitalized and we have cash reserves that are expected to fund our current operating plan into 2023. So with that, thanks very much, thanks for joining the call and I'll turn it back over to the operator for Q&A.

[Operator Instructions]. Your first question comes from the line of Anupam Rama with J.P. Morgan. Your line is open.

Hey guys, thanks so much for taking the question and congrats on the quarter. Just a quick one from me, of the 100 plus physicians to prescribe ARCALYST that were not in the Phase 3, were these physicians largely from the academic setting or community setting, or was it a mix? And the doubling of growth that you're expecting in recurrent pericarditis going from 2Q to 3Q, does that assume scripts from existing prescribers or does it assume new prescribers as well? Thanks so much.

Ross, do you want to take that?

Yes, I'm happy to, Sanj. Hi Anupam, thanks very much for the question. So maybe to your first point, whether it's from academic or other centers, I think really the answer is that it is a mixed approach that we've seen. We were delighted to see the continued uptake in amongst those centers that have child experience and the really broad experience that we started to see since launch outside of that. Our focused targeted strategy is really based from market research and claims data where we see the highest throughputs of recurrent pericarditis, and that's really agnostic to whether they are in academic center or otherwise. So we're very focused on that 350 target accounts. I'm happy to see a really broad prescriber base come out of that. And then maybe, to your points around the next quarter whether it's existing or new prescribers, again, we expect to see a mixture we have more than 100 prescribers as we said, outside of the RHAPSODY PIs now as well, we expect that to continue to grow in terms of the breadth. But also hope to start to make some more penetration into the depth of prescribing as well. And I mentioned in the presentation that we've started to see a small growing number of physicians for pre-prescribing, we think that steady increase will continue as we move forward.

Your next question comes from the line of Paul Choi with Goldman Sachs. Your line is open.

Good morning. This is Corinne Jenkins on for Paul. Can you just talk about how that set of 100 physicians compares to the initial targeted accounts you had identified? Are these mostly from those targeted accounts and how does the piece compare to what you expected?

Yes. So this is Ross again, happy to answer that. Thank you for the question. So, yes, as we said though, we're pleased 100 prescribers many of those come from within the targeted accounts that we set out and that we're really focused on. But also, what's the field team are very heavily focused on those 350 accounts. We've also been busy on the digital marketing side and also through webinars and speaker meetings, and other means as well, I'm making sure that we get a greater breadth of coverage to increase the awareness of the disease and now ARCALYST as well. So that along with, I think the patients that have mobilized and gone to their physicians once they hear about ARCALYST, as well as all kind of helped in impact on the uptake from how we got on in the first quarter.

That’s helpful. And then can you just talk about any impact from the delta variant on the pace of enrollment in the Phase 3 study for COVID-related ARDS?

John, do you want to take that?

Yes, good morning. This is -- absolutely. Thank you, Sanj. So, yes, good morning and thank you for the question. Yes, and definitely as you know, the delta variant has resulted in a recent upsurge in cases across the world. As you also know the Phase 3 trial is a global trial, which is running in the United States, Brazil, South Africa, Chile, and Peru. And so in that sense, the Phase 3 trial continues on pace, and as I mentioned it is greater than 75% enrolled at this time with a target population that we discussed with the FDA of approximately 600 patients.

Your next question comes from the line of David Nierengarten with Wedbush. Your line is open.

Hi, thanks for taking, and I've a couple of questions here. First off, I was wondering what the -- kind of what the disposition of patients are who got prescriptions on this quarter, were they patients who have been treated long-term for recurrent pericarditis. Are they relatively new diagnosis maybe you'll have three or six months history or whatever I'm just a little bit curious as to how quickly they might be treated with rilonacept over time after diagnosis. And then on -- it's on the recruitment in the prurigo nodularis study. Just, is there any additional guidance on when you could present data from that? Thank you.

Ross, do you want to start, and then I'm sure John will jump in.

Yes, absolutely, Sanj. Hi David, thank you very much for the question around the patient disposition and then where they're coming from. So I mean really what we've seen in this early stage opiates that they -- the end is relatively low in a first launch quarter, but we really see a mixture of patients that have started ARCALYST at the moment. Broadly speaking, we've had patients that have come from other treatments hence they've had recurrent pericarditis for some time and have been cycling through treatments whether that's corticosteroids. And we know many patients that are stuck on corticosteroids and stuff, and the toxicity effects of that as well as elongate in the actual disease and making it difficult to come off. So we've seen some of those patients transition across to our place as well as of course these patients coming from clinical trial with ARCALYST to commercial ARCALYST as well. So that's been a certain amount. But I think that the majority really are coming from those kind of multiple relapsing or refractory type of buckets, which are those really the new to ARCALYST patients.

And then, David, good morning. Nice to speak with you. This is John. Regarding your question about Vixarelimab and the prurigo nodularis Phase 2b study. Yes, so we did announce at the end of last year that we had started enrolling and dosing patients in this trial, which is a testing three different monthly subcutaneous dose regiments at Vixarelimab to 180 patients with moderate to severe prurigo nodularis. At this point in time, we haven't disclosed any particular timelines and aren't providing guidance on enrollment on this time. But we are excited about this study because of the fact that it does provide -- it's designed to provide this important dose ranging information, especially with a longer timeframe over 16 weeks. And so that’s where we are at this point. Thank you.

Your next question comes from the line of Geoff Meacham with Bank of America. Your line is open.

Good morning. This is Jason on for Geoff. Thanks so much for taking our call and congratulations on the quarter. I just wanted to maybe do a gut check thus far of the launch, as you compare what has happened to your expectations, what has gone, well, maybe what hasn't gone as well, and in terms of thinking about the trajectory of the launch and uptake and maybe an overall inflection where does that stand at this point? Thanks.

Thanks, Jason. Yes. So this is Sanj. Obviously, we feel very good about the launch and we're really pleased with the second quarter results. Maybe I'll hand over to Ross. I certainly can't think of what hasn't gone so well other than the fact that obviously the COVID virus being out has impeded some sort of face-to-face visits, but that has been increasing steadily and thanks to digital formats. We've been able to have the actual number of interactions with physicians severely improve over time including face-to-face visits, but maybe Ross also if you want to comment on some of Jason's points.

Yes. I'm very happy to Sanj. Thank you. Hi Jason thanks for the question. So yes, and I think we've really kind of vetted the team. We've got a great experienced team in place in the field of cardiovascular experience that's really helped us to open the doors and meet with physicians is what of course is the compelling data wanting to get out there. So I think, it is a big lift as an organization moving towards a commercial launch for the first time as a company, but really very successfully done. I'm delighted with the launch quarter results may -- maybe a little bit to your question around kind of expectations, maybe more forward-looking if I just clarify one or two things on the forward-looking statement going into Q -- Q3, which we said that the guidance is $9 million to $10 million as we move forward. Of course, when we look at Q2, it was $7.7 million that was fairly evenly split between the three different areas of RP, CAPS and DIRA and the inventory build that we will see in the beginning of a launch. In Q3, we expect the CAPS and DIRA to really remain very similar to in Q2, we expect marginal with any inventory growth. So from that side, so really everything is down to recurrent pericarditis growth moving forward. So if you take the -- like the Q3 mid-point of $9.5 million and deduct the expected CAPS revenue, you'll see that around $7 million moving forward needs to come from recurrent pericarditis. So we've got a significant growth greater than two-fold growth moving forward. So we feel good about that. We feel that it is certainly very, very ambitious on the growth trajectory. But given the nature of the disease, it's a flaring disease as well as a rare disease, it's going to be a steady build through to the peak plus we know in Q3 that the bolus of patients that we had in Q2 is no longer there with the LTE, the long-term extension patients that have already transitioned across. So really excited about where we are so far. Having had a great launch quarter, excited about looking forward. It's going to continue to be a steady build through too, I think.

I will now like to turn the call back over to Sanj Patel for closing remarks.

Thanks, operator. So obviously just to end, thanks, everybody for joining in. We're obviously very pleased with the performance to-date and we're exceedingly focused now on our future execution. This is what we do. So let's get back to work and we'll be in touch soon. Thank you. Thanks, everybody.

This concludes today's conference call. Thank you for participating. You may now disconnect.