Good morning and welcome to the Fulcrum Therapeutics First Quarter 2020 Conference Call. Currently, all participants are in listen-only mode. There will be a question-and-answer session at the end of this call. I would now like to turn the call over to Christi Waarich, Director of Investor Relations and Corporate Communications at Fulcrum. Please proceed.

Thank you [Demetria]. Good morning and welcome to the Fulcrum Therapeutics conference call to discuss our first quarter 2020 financial results and recent corporate highlights. Earlier today we issued a press release outlining our recent progress. For those of you who don't have a copy you can access it in the investor relations section of our website at fulcrumtx.com. Please be reminded that remarks made during this call may contain forward looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These may include statements about our future expectations and plans, clinical development timelines, and financial projections. While these forward-looking statements represent our views as of today, they should not be relied upon as representing our views in the future. We may update these statements in the future, but we are not taking on an obligation to do so. Please refer to our most recent filings with the Securities and Exchange Commission for a discussion of certain risks and uncertainties associated with our business. With me on today's call are Robert Gould, President and Chief Executive Officer; Diego Cadavid, Senior Vice President of Clinical Development; Owen Wallace, Chief Scientific Officer; and Bryan Stuart, Chief Operating Officer. Let me quickly run through this morning's agenda. Robert will begin the call with an overview of our recent progress. Diego will discuss our FSHD program. Owen will discuss our sickle cell program and research efforts and Brian will cover our financials before opening the call for Q&A. With that, it's my pleasure to turn the call over to Robert. Robert?

Thank You, Christi. Good morning everyone and thank you for joining us today. I first want to thank the healthcare workers, investigators, and caregivers for their courage and passion as they continue to support so many during the challenges of COVID-19. Our hearts go out to everyone who has been impacted; to all of our friends, colleagues, and the patient communities we serve, we hope you are keeping safe and healthy. Fulcrum's mission and purpose remain unchanged as we work to discover and develop therapeutics to treat genetically defined diseases by addressing their root cause. I'm proud of how our employees have risen to the evolving challenges of the COVID-19 pandemic. I'd like to begin by highlighting some of our recent updates and accomplishments. Today, we announced an amendment to ReDUX4 our Phase IIb trial with losmapimod in patients with facioscapulohumeral muscular dystrophy or FSHD. Diego will go over the amendment in more detail. These changes will extend the patient treatment from the original trial design and we believe will provide a more robust data set while addressing the challenges presented by COVID-19. Early in the quarter, we received orphan drug designation from the U.S. Food and Drug Administration for losmapimod in FSHD. I'm pleased to report that we have also received orphan designation from the European Commission for losmapimod for the treatment of FSHD. Like in the U.S., orphan designation is granted by the European Commission to drugs that are intended for the treatment, prevention, or diagnosis of life-threatening or chronically debilitating rare diseases. We are extremely pleased to have received this designation further supporting the advancement of losmapimod’s FSHD program. We recently presented dose dependent target engagement data in skeletal muscle from our Phase 1 trial with losmapimod during a virtual clinical trial session at the Muscular Dystrophy Association meeting. We continued to make progress with FTX-6058, an oral small molecule therapeutic designed to induce expression of fetal hemoglobin in select hemoglobinopathies. You'll hear about our sickle-cell program from Owen later in the call. We also continue to make progress on our early, research-stage activities including building out FulcrumSeek, our proprietary product engine designed to identify drug targets, programs, and clinical development candidates in a broad range of genetically defined diseases, and we initiated research activities under our collaboration with Acceleron. I'd now like to turn the call over to Diego for an update on the FSHD program. Diego?

Thanks Robert. As a reminder, FSHD is a progressive disease characterized by severe muscular degeneration that occurs as skeletal muscle is replaced by fat. We estimate there are approximately 16,000 to 38,000 patients in the U.S. and similar incidents worldwide. There are currently no approved drugs for FSHD, and we are advancing the only known industry-sponsored clinical trial evaluating a potential treatment. Unlike other diseases that can be characterized by the lack of a gene, FSHD is characterized by the aberrant expression of the gene DUX4, the root cause of the disease. We at Fulcrum discovered that losmapimod, a selected p38 MAP kinase inhibitor reduced the expression of DUX4 in preclinical studies. We therefore believe losmapimod represents a potential novel therapeutic option for FSHD patients. Our own evidence as well as independent evidence suggests that we do not have to turn DUX4 off completely to provide benefit. There is a spectrum of DUX4 expression and FSHD presentation that suggests that even an incremental reduction may be beneficial to patients. Thus, we believe, as do independent researchers, that any reduction in DUX4 driven gene expression has the potential for benefit to patients. ReDUX4 is our international Phase IIb, double-blind placebo-controlled trial of losmapimod in patients with genetically confirmed FSHD. We completed enrollment of 80 patients at the end of February, which exceeded the 66 we had originally planned. The primary endpoint of the trial is the change from baseline in DUX4 driven gene expression in affected skeletal muscle. We also completed enrollment in our phase 2 single site open label trial, which has been impacted by COVID-19 and we are considering next steps. Fulcrum is dedicated to maintaining the highest standards in patient and clinician safety, in the planning and execution of our clinical research programs, the safety of our clinical…

Thanks Diego. At Fulcrum we pursue targeted indications where we believe we can develop safe and effective small molecule therapies to rebalance gene expression. In our work across various indications we consistently aim to address the root causes of disease to increase the potential efficacy of these treatments and more broadly transform the way these diseases are being treated. In spite of the challenges posed by COVID-19, we have continued to make progress on our research and early clinical portfolio. As an essential business we continue lab operations obvious on a more limited spaces. As a results we continue to advance the collaboration with Acceleron as well as our internal portfolio. We have also advanced our work on FulcrumSeek, a proprietary product engine designed to identify drug targets programs and clinical development candidates in a broad range of genetically defined diseases. By combining high-throughput RNA sequencing cellular imaging data and large scale machine learning, we are monitoring more than 10,000 molecular and cellular features generated by the small molecule probe and CRISPR perturbation libraries. Understanding their effects on gene expression is fundamental to our therapeutic strategy to modulate the genetic group cause of disease. FulcrumSeek is not only the core of our target identification strategy, it also provides us with the unique understanding of how cellular function is altered in human disease. I'd like to thank our employees who have continued to work diligently through the COVID-19 crisis to advance our research programs, especially those who are coming into the lab, working under social distancing and enhance health and safety guidelines. Likewise our hemoglobinopathies program has continued to advance towards the IND filing, our approach has focused on the up regulation of fetal hemoglobin which could be beneficial for both sickle-cell disease and beta thalassemia. By increasing levels of HbF…

Thanks Owen. In these unprecedented times Fulcrum is committed to making a difference for patients with FSHD and select hemoglobinopathies such as sickle-cell disease. We're proceeding with a great sense of urgency to bring these potentially transformative therapies to patients. We entered the first quarter of 2020 with $81.2 million in cash, cash equivalents and marketable securities. Based on our current operating plan and projections we believe this will support our operations into the third quarter of 2021 allowing us to advance losmapimod FSHD and bring FTX-6058 into the clinic while continuing to invest in our discovery stage efforts. Research and development expenses for the quarter ended March 31, 2020 were $14.5 million compared to $34.6 million in the first quarter of 2019. Included in that $34.6 million was $25.6 million of one-time cost associated with the issuance of series B convertible preferred stock under the company's license agreement with GSK for the [rights] losmapimod, excluding these one-time costs the increase of $5.5 million was primarily due to increased costs related to the advancement of losmapimod for the treatment of FSHD as well as increased personnel related cost to support the growth of Fulcrum's research and development organization. General and administrative expenses for the first quarter of 2020 were $5.1 million as compared to $2.6 million for the first quarter of 2019. This increase is primarily due to increase personnel related cost to support the growth of our organization as well as increased cost associated with operating as a public company. Overall we remain undeterred in our mission and continue to expect several upcoming catalysts. We will report the interim analysis from ReDUX4 in the third quarter of this year. We will initiate the phase 1 trial with FTX-6058 in sickle-cell disease and disclose the biochemical drug target by the end of the year and we will continue to advance our discovery programs from our product engine while making progress with our partners at Acceleron. We're excited about the work ahead as we continue as we continue to execute on our plans and we look forward to keeping you updated on our progress in the months ahead. Operator you may now open the line for questions.

Operator we are now ready for questions. Operator?

[Operator Instructions] Our first question comes from Matthew Harrison with Morgan Stanley. You may proceed.

This is Kostas [ph] for Matthew. Thank you for taking our questions. A couple of questions from my side. The first one is whether you guys expect to lose any power given that you will only have 25 subjects in the first interim analysis. Do you think you will have enough power to see a signal there or you expect the data only to be directional to show you an improvement or not?

Yes. Thank you for the question. This is Diego Cadavid. The sample size of 80 subjects is -- we believe has appropriate power to answer the question at the end of the trial. 25 subjects, we believe will give us an initial opportunity to look at the data and help us prepare and make some early insights into Phase III planning.

Okay. Thank you and the follow-up question. Will you need to recruit additional subjects or you believe you have all the subjects you need at this point?

We have completed recruitment. We believe we have all the subjects we need.

Okay. And finally, I was wondering whether -- in the second part, when you expect all the subjects to have a biopsy at 16 or 36 weeks given that there might be a second wave of the pandemic of additional -- a second wave of infections, how certain you are you can have all the subjects complete the second biopsy at 36 weeks and whether there is any actions you are taking to mitigate this risk of losing some patients there again? Thank you.

Yes. When we amended the protocol, we carefully considered exactly what you're referring to. So, we’ve built some windows, time windows around the 36 week, and sites have flexibility as well as patients. So, right now, we anticipated that we will get the data either at week 16 or at week 36 regardless.

Okay. Thank you very much.

And our next question comes from Joseph Schwartz with SVB Leerink. You may proceed.

My question would be, can you talk about how you arrived at a doubling in duration for the ReDUX protocol with respect to the clinical endpoints? Will patients in ReDUX4 still be evaluated at 24 weeks, and how many patients are hitting this time point in the second half of this year when it seems like social distancing might relax, and then when would most patients be hitting the 48 week time point? Have you done an analysis there to consider that this is in your best interest given, however, this pandemic might evolve with respect to its different waves based on where you’re enrolling these patients?

Yes. ReDUX4 trial completed enrollment in about six months between August of last year and February of this year. Therefore, the patients are moving across all the visits over a period of six months. We decided to extend this study by an additional 24 weeks because we believe based on what is happening and what we expect to happen with COVID-19, this will give flexibility for the patients to collect data across a much longer period where we expect the clinics to be open, even if intermittently. So overall we believe that even if some 24-week basics are missed, patients would come back later, and as you know FSHD is a slowly progressive disease. We are not counting acute events. So as long as we are collecting the data over time, we believe we'll be able to answer the efficacy questions. Especially many sites are still open. The impacts of the pandemic is not affecting every site.

And are you able to bring patients in and just strike while the iron is a little bit warmer in this period we seem to be entering as we speak now? Could you bring patients in for an evaluation? Can you talk about, is it just at 24 and 48 weeks that the clinical assessments are being performed or do you have any ability to speak in some additional sites without making additional protocol adjustments that might require you to take alpha hits?

Yes. This amendment builds flexibility. So, all the basics of the original protocol over 24 weeks are open, sites that are open, patients are coming, and the amendment provides additional opportunities at week 36, week 48 with extended windows. So, we really aim -- give opportunities to capture as much data regardless of what happens with COVID-19. We're very fortunate that not only the sites, but the patients are very committed and that's reflected in the high subject retention we have on the trial.

That's very helpful. Thank you and then have you been able to garner any insights to date from the open label trial? It sounds like you suggested that it's been impacted from COVID-19, and I heard you're evaluating the next steps there. So, why has that been impacted more it sounds than ReDUX4, and can you provide any color on that front?

Yes. The open-label study is a single site. So, you don't have this opportunity we have in ReDUX4 when we have many sites, and therefore if one region that happens to be where this site is heavily affected, of course the impact will be larger, and that site is in the Netherlands. We have always considered that a learning trial, the trial began in August, so obviously we have had valuable learnings from that trial, which has always been the goal to inform what we do in reDUX4, so in that sense we believe this trial has been helpful.

That's helpful. Thanks for the color.

And our next question comes from Tazeen Ahmad with Bank of America. You may proceed.

I just wanted to clarify your powering assumption. So, you previously said that the study would be powered to show a 50% reduction of DUX4 at week 16. Just based on the changes that you're talking about, how does that affect the potential path to accelerated approval and have you spoken with FDA about the particular item?

Hi Tazeen, this is Robert. Just a slight correction on -- I don't believe that we did power the study for a 50% reduction in the DUX4. That was not one of the original assumptions, but I will let Diego speak to the powering assumptions we made.

Yes, Robert, that is correct. We have never disclosed what the assumptions are for the power. This amendment is not impacting the power. The sample size is the same. it only adds some flexibility because their own treatment muscle biopsy can be at week 16 or week 36 and we don't really expect a loss of subjects based on this amendment. Therefore nothing has changed about the power assumptions.

Okay and how are you taking into account your effectively increasing the length of this study to a year. What are you seeing in compliance rates for the study so far and does this increase? Do you have any buffer if you will for potential dropouts in this study with the expensive time of observation?

Yes. Thanks Tazeen. This is Robert again. One of the things that we've really been struck with is the cooperation of the patients and their willingness to take losmapimod as just to remind you as you know it's an oral drug taking place daily 7.5 milligram tablets. So two tablets, in the morning two tablets, in the evening and we just had not only a high retention rate of the patients but we believe high compliance as well. The original and so, the original trial was enrolling 66 patients and because of the response we had from the patient community and the opportunity we had, we actually increased that to 80 patients. So even if things were to change with the patients we do believe that we're still going to be able to have the original 66 patients but at this point in time we believe we're going to be able to retain most of the patients that are currently in the study if not all of them that are currently in the study.

Okay. My last question is about taking the biopsy at 16 weeks or 36. How did you come up with 36 and how do you feel confident in the integrity of the readings at both time periods because it's a big gap in between the two? A - Diego Cadavid Yes. This is Diego. So we have had done our own preparatory study to look at the stability and variability of the DUX4 gene signature and their natural history and that was done about 6-8 weeks apart. The academic a group of the Wellstone collaboration had done it over a year apart and they were very generous and shared all their data with us. So we know from these two studies that this DUX4 signature at the population level is very stable. So this interval between eight weeks or a year apart basically gives us a good argument that as long as we collect it, repeated biopsies within that interval, we don't expect any impact on greater value ability or loss of signature. So 36 really came in terms of building flexibility for patients and sites who had not obtained the 16-week biopsy as the pandemic moves assuming that over time there will be a decrease of [feeds] and size we'll be able to reopen and bring the patients into obtain these biopsies. It's 36 weeks but we have a window. So sites and patients can be flexible and we believe that is the best chance to collecting the efficacy endpoint without losing power and keeping the quality.

[Operator Instructions] And our next question comes from [Edward Tenthoff] with Piper Sandler. You may proceed.

Well, and thank you for the update. I'm wondering what changes that this additional time and data may make to a potential registrational study and would this be something that now would start at some point next year and how, it's still early obviously with this data set but what would you be envisioning for next step ahead?

Yes, Ed. So I think first of all the interim analysis, it's a 16-week data. We're doing that in order to gain insight into what our phase three trial design might look like. So we can begin that planning earlier. As you know we had originally projected the top-line data in the third quarter to begin that planning process and that planning process we think can be really informed by this 16 week interim analysis data that we're doing. And again remind you any kind of conditional approval would require a confirmatory trial anyway and that was a point of having the top-line data available so we can begin that planning process. Diego do you want to add a little more detail on that?

No. I think if anything as we said having a longer duration of treatment against placebo can only make this study better and more informative.

Yes. Makes sense. Excellent. Looking forward to the interim update. Thanks so much for the time.

Ladies and gentlemen this now concludes Q&A portion of today's conference. I would now like to turn the call over to Robert Gould for any closing remarks.

I want to thank you all for joining us today and for your interest and support to Fulcrum. Please note that we are all hoping you and your families remain healthy and safe and thanks again for your time today.

Ladies and gentlemen thank you for attending today's conference. This does conclude the program. You may all disconnect. Everyone have a great day.