Welcome to the Regeneron Pharmaceuticals Second Quarter 2022 Earnings Conference Call. My name is Bella, and I will be your operator for today's call. [Operator Instructions]

I will now turn the call over to Ryan Crowe, Vice President, Investor Relations. You may begin.

Ryan Crowe - Vice President of Investor Relations

Thank you, Bella. Good morning, good afternoon and good evening to everyone listening around the globe. Thank you for your interest in Regeneron, and welcome to our second quarter 2022 earnings conference call. An archive of this webcast will be available on our Investor Relations website site shortly after the call ends. Joining me today are Dr. Leonard Schleifer, Founder, President and Chief Executive Officer; Dr. George Yancopoulos, Co-Founder, President and Chief Scientific Officer; Marion McCourt, Executive Vice President and Head of Commercial; and Bob Landry, Executive Vice President and Chief Financial Officer.

After our prepared remarks, we will open the call for Q&A. I would also like to remind you that remarks made on this call today include forward-looking statements by Regeneron. Such statements may include, but are not limited to, those related to Regeneron and its products and businesses - business, financial forecast and guidance, development programs and related anticipated milestones, collaborations, finances, regulatory matters, payer coverage and reimbursement issues, intellectual property, pending litigation and other proceedings and competition.

Each forward-looking statement is subject to risks and uncertainties that could cause actual results and events to differ materially from those projected in that statement. A more complete description of these and other material risks can be found in Regeneron's filings with the United States Securities and Exchange Commission, including its Form 10-Q for the quarterly period ended June 30, and 2022, which was filed with the SEC this morning. Regeneron does not undertake any obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise.

In addition, please note that GAAP and non-GAAP measures will be discussed in today's call. Information regarding our use of non-GAAP financial measures and the reconciliation of those measures to GAAP is available in our financial results press release which can be accessed on our website. Once our call concludes, Bob Landry and the IR team will be available to answer any further questions.

With that, let me turn the call over to our President and Chief Executive Officer, Dr. Len Schleifer. Len?

Leonard S. Schleifer - Founder, President, Chief Executive Officer

Thank you, Ryan, and thank you to everyone joining today's call. Regeneron had a strong second quarter with notable execution across R&D, commercial and business development functions. Total revenues increased by 20% when excluding contributions from our COVID antibody cocktail, with net sales for EYLEA, Dupixent and Libtayo each reaching new all-time quarterly highs and growing by double digits year-over-year on a constant currency basis.

In addition to exceptional commercial execution, we made significant pipeline progress with three regulatory approvals, two accepted regulatory filings and one positive Phase III readout. We also completed the acquisition of Checkmate Pharmaceuticals and the third quarter purchase of worldwide rights to Libtayo from Sanofi, both of which we believe will strengthen our oncology franchise in the near, medium and long term. We also reported today preliminary, but promising anti-tumor activity and safety data for REGN5678, our PSMAxCD28 costimulatory bispecific in combination with Libtayo in patients with advanced metastatic castrate-resistant prostate cancer.

George will have more to say on this shortly, but we believe this represents an important step towards validating our costimulatory approach to fighting cancer and potentially advancing the science of immuno-oncology. Turning to our commercial performance. In the second quarter, EYLEA global net sales grew 13% at constant exchange rates to $2.5 billion. In the U.S., EYLEA net sales were $1.6 billion, up 14% year-over-year and outperforming anti-VEGF category growth of approximately 8%.

Despite new competition, EYLEA's share was approximately half of the anti-VEGF category and 75% among branded agents, affirming its status as the gold standard anti-VEGF therapy. We believe aflibercept represents a significant potential growth opportunity going forward, given favorable demographic trends as well as the potential for aflibercept eight milligrams to augment the category and complement our retinal franchise. Regarding our investigational aflibercept eight milligrams, the goal of our clinical program is to evaluate where the visual acuity among wet AMD and DME patients can be maintained or improved compared to EYLEA while extending the interval between doses.

Equally important is maintaining the high bar for safety that has been set by EYLEA over the past 10 years, 55 million injections worldwide and eight million patient years of experience. We anticipate pivotal results in late quarter three or early quarter 4. And with supportive data, a BLA submission completed by early 2023. Dupixent continues to grow at a remarkable pace after five years and more than 450,000 patients treated since launch.

In quarter 2, global and net product sales were $2.1 billion, an increase of 43% at constant exchange rates compared to last year, reflecting Dupixent's differentiated clinical profile and ability to effectively treat more and more patients with the type two inflammatory diseases where Dupixent is approved. In the U.S., we saw growth across all indications, including initial contributions from atopic dermatitis in patients as young as six months to five years of age and from eosinophilic esophagitis, both of which are indications approved by the FDA during the second quarter and represents the first approved systemic treatment options for these patients.

We hope to add a third first-in-class indication for Dupixent later this year in patients with prurigo nodularis, which is currently under priority review with the FDA. In oncology, Libtayo net product sales grew 25% globally at a constant currency to $141 million in the second quarter of 2022, including 17% growth in the U.S. driven by non-melanoma skin cancer indications and monotherapy non-small cell lung cancer. We have long believed that the key to fully unlocking the opportunity in oncology is through differentiated combinations, with Libtayo possibly serving as our foundation for many of them.

That belief was the basis for acquisition of the global rights to Libtayo. We plan to invest further in Libtayo-based combinations, pairing it with promising candidates in our oncology pipeline such as LAG3 antibody fianlimab and our many investigational bispecifics, as well as with candidates from external collaborations. We continue to make progress with these Libtayo combinations and intend to share initial data in the second half of this year from our emerging oncology pipeline, which George will discuss in more detail. Regarding the FDA's review of our Libtayo-chemo combo supplemental BLA for the treatment of non-small cell lung cancer, we are pleased with the progress that we have made as the FDA continues its review.

However, we recently were informed that an FDA travel complication relating to scheduling a routine clinical trial satisfaction in Eastern Europe will likely delay their decision until after our September 19 PDUFA date. While any delay is disappointing, a new site inspection date has been scheduled. Therefore, we do not expect a lengthy extension of the review period, and we do not expect it to meaningfully impact our launch plans assuming FDA approval. We continue to actively work with the FDA, believing the ongoing review is otherwise progressing well and all other elements of the review remain on track. Regarding our COVID-19 response, Regeneron remains committed to combatting the virus by developing additional novel antibodies.

We continue to work with the FDA to establish a regulatory pathway for these antibodies, which could potentially serve an important role in protecting immunocompromised individuals, who do not respond adequately to COVID-19 vaccines as well as treating infected patients, whom oral antiviral therapy is not appropriate. In closing, as I reflect on our performance in the first half of the year, I am very proud of our numerous achievements, which were only made possible by the dedicated Regeneron employees around the world.

Together, we have continued to serve patients in need while strengthening the foundation of the company and leveraging our financial strength to better position Regeneron to achieve sustainable growth over time. We are excited about the increasing commercial momentum for our core products and the important progress we have made in advancing our pipeline. Our strategy continues to focus on investing in our internal R&D capabilities while exploring potential collaborations that will enable us to fully realize the power of our science. We remain confident in the strategy and in our growth prospects as well as our ability to deliver breakthroughs to patients and value to shareholders.

Now, I'll turn the call over to George.

George D. Yancopoulos - Scientific Founder, President, Chief Scientific Officer

Thanks, Len. I will start with ophthalmology. We are looking forward to the upcoming Phase III readouts of aflibercept eight milligram in patients with diabetic macular edema and in wet age-related macular degeneration. PHOTON in patients with DME and PULSAR in patients with wet AMD will test whether the patients treated with eight milligrams dose every 12 weeks or every 16 weeks can achieve non-inferior best corrected visual acuity at week 48 compared to the currently approved EYLEA 2-milligram dose every eight weeks. Unlike studies from other sponsors in which patients were assigned to a dosing interval based on disease activity assessment following the loading phase, patients enrolled in the PHOTON and PULSAR studies were randomized at baseline into one of the three treatment groups, we believe will allow us to determine whether extent dosing can truly be achieved.

If the studies are positive and the high safety standard established with EYLEA is maintained, we believe aflibercept eight milligram would represent a significant clinical advance for patients, and we would target a U.S. regulatory filing by early 2023. Moving to Dupixent, which continued to deliver notable milestones in the second quarter of the year. Dupixent was recently approved and chosen with atopic dermatitis as young as six months old, making Dupixent the first and only biologic medicine approved to treat atopic dermatitis from infancy through adulthood.

Marion will talk more about this as well as about our recent earlier-than-expected FDA approval for a brand-new gastroenterology indication, eosinophilic esophagitis or EoE. Since receiving approval in adults and in adolescents age 12 and over, we have reported positive data in pediatric patients with EoE as young as one year of age. Our Phase III study in children one to 11 years of age met the primary endpoint, with 68% of patients on the higher Dupixent dose and 58% of the lower Dupixent dose achieving histological disease remission compared to 3% of children on placebo at 16 weeks.

EoE symptoms can be difficult to assess in these young patients, however, we also observed a numerical improvement in the EoE symptom score and in exploratory analysis, we recorded a 3.1% increase from baseline and body weight for age percentile for the higher dose group compared to 0.3% of the placebo on. These data will be discussed with the regulatory authorities, starting with the FDA, later this year. Regarding approvals for new indications expected in the near future.

For prurigo nodularis, we received a PDUFA action date from the FDA of September 30 and the European Commission decision expected in the first half of 2023. Also in the first half of next year, we're also looking forward to the readout of the first Dupixent study in chronic obstructive pulmonary disease or COPD. Moving on to Libtayo and oncology.

As Len mentioned, we are excited to have acquired Sanofi stake in Libtayo, thereby gaining exclusive worldwide rights to a PD-1 inhibitor review as foundational for our oncology franchise, which has the potential to be utilized in numerous combinations with other candidates in our pipeline such as our costimulatory bispecifics, our CD3 bispecifics and novel checkpoint inhibitors such as fianlimab.

Regarding such combinations, I'd like to provide a brief update on our first clinical data from our costimulatory pipeline involving REGN5678, our PSMAxCD28 costimulatory bispecific, in combination with Libtayo. This combination is being studied in patients with advanced metastatic castrate-resistant prostate cancer, who have previously progressed on multiple antiandrogen therapies.

These patients, unfortunately, have a poor prognosis, with approximately one to two years of life expectancy and with limited treatment options. Metastatic castrate-resistant prostate cancer is considered an immunologically cold tumor and is largely resistant to immune checkpoint inhibitor, with large trials of PD-1 antibodies showing monotherapy response rates in the single digits.

As just announced today by Merck, the challenge of metastatic castrate-resistant prostate cancer in terms of the lack of efficacy for checkpoint inhibitors used in standard way is emphasized by the failure of their large Phase III trial in an earlier stage of this disease. Our costim program was designed to innovatively enhance responsiveness in these types of cold tumor classes such as prostate cancer and essentially turn these cold tumors into hot tumors.

I remind you of the extensive preclinical data we have published supporting this hypothesis. Since 2019, we have been in careful dose escalation for this prostate cancer program in close collaboration with the FDA. In our study, patients are dosed weekly with REGN5678 in every three weeks with Libtayo. However, first dose of Libtayo was not co-administered until week 4, permitting a period of PSMAxCD28, leading to evaluate monotherapy safety and efficacy.

Earlier today, we announced the first clinical data from 33 patients across 8-dose levels, which show dose-dependent antitumor activity. The key efficacy endpoint in the study is objective response rate defined as a greater than 50% decline of prostate-specific antigen or PSA from baseline and/or tumor shrinkage. PSA is a protein produced by the prostate gland and by prostate tumors and is most commonly used as a biomarker to diagnose and follow-up prostate cancer, as many metastatic castration-resistant prostate cancer patients have disease limited to bone lesions and cannot be assessed by conventional RECIST criteria.

Preliminary data from the ongoing dose escalation portion trial across 8-dose level cohorts in a total of 33 patients showed dose-dependent antitumor activity as assessed by PSA values at the five lowest dose levels, which our preclinical models predicted might be subtherapeutic. There was almost no evidence of any antitumor activity, with only one of 17 patients showing a decrease in PSA. There were no greater than greater or equal to Grade three immune-related adverse events or irAEs these doses.

The lack of antitumor activity among these patients was consistent with the approximate 6% response rate reported in other trials with anti-PD-1 monotherapy. At the next three dose levels, we began to see clear evidence of dose-dependent antitumor activity, which was generally seen within six weeks of starting the combination treatment. At dose level 6, one of four patients experienced a 100% decrease in PSA and a complete response in target lesions based on RECIST criteria.

The patients discontinued therapy due to a grade three immune-related adverse events of the skin. That was considered to be a recurrence of preexisting condition, and have since resolved with treatment per investigator report. Despite termination of the treatment, he has maintained his 100% decrease in PSA and complete response in target lesions were approximately 10 months to date per investigator report. We continue to see antitumor activity at the next dose level or dose level 7.

And in our eighth and most recent dose level, three out of four patients had dramatic and rapid PSA reductions, two with greater than 99% reductions and one with an 82% reduction. Of the two patients with greater than 99% PSA reductions, one experienced a grade three case of mucositis, which has resolved, and the other experienced a grade three case of acute inflammatory demyelinating polyradiculopathy, which is ongoing. In terms of safety, very importantly, no grade three or higher irAEs were observed in patients without antitumor activity.

And the occurrence of irAEs was correlated with antitumor activity. This is consistent with previous trials with anti-PD-1 immunotherapy wherein irAEs have been reported to occur at a higher rate in responding patients. No grade four irAEs or greater than or equal to grade two cytokine release syndrome have been observed in the trial to date. There was one death that was considered unrelated to treatment. In this trial, irAEs are being treated according to standard management practices used for checkpoint inhibitors.

We are planning on sharing more detailed data from this study at an upcoming medical meeting. Let me remind you that through extensive preclinical research, we have hypothesized that augmenting T cell costimulation alongside PD inhibition could be a key to turning immunologically cold tumors hot. These preliminary data for our PSMAxCD28 costimulated bispecific provides the first clinical evidence supporting the promise of our broader pipeline of costimulatory bispecifics in diverse solid tumors as well as hematologic malignancies.

By combining these costimulatory bispecific with Libtayo or with our CD3 bispecifics, we have the opportunity to create novel therapeutic synergies to address some of the most difficult-to-treat cancers. We look forward to partnering with the oncology community on this ambitious and potentially groundbreaking efforts. In addition to these exciting early data, we anticipate several important oncology milestones in the second half of the year.

At the upcoming ESMO conference, we will provide updates on fianlimab, our LAG3 antibody in combination with Libtayo, in a Phase II cohort of metastatic melanoma that will hopefully confirm the encouraging combined efficacy that we previously reported in this setting. In addition, we will present initial data for ubamatamab, our MUC16 timesCD3 bispecific in metastatic ovarian cancer, where I'd like to remind you that we have also combination studies ongoing with both costimulatory bispecifics and Libtayo.

We will also report initial data for our METxMET bispecific in advanced MET-altered non-small cell lung cancer as well for Libtayo monotherapy in neoadjuvant cutaneous squamous cell carcinoma. Moving on to our hematology pipeline. Odronextamab has the potential to be the first C20 timesCD3 bispecific to be approved for both major types of advanced B-cell lymphomas, that is both follicular lymphoma and diffuse large B-cell lymphoma. Based on interim data from a cohort of patients, goes with our recently modified step-up regimen.

We believe odronextamab may have the lowest rates of Grade three or higher cytokine release syndrome for this class of bispecifics, in follicular lymphoma and diffuse large B-cell lymphoma, while still maintaining the efficacy profile previously reported. We look forward to presenting these updated data and potentially submit a BLA for both indications in the second half of this year, pending feedback from the FDA. We also plan to share updated data for our BCMAxCD3 bispecific study in relapsed or refractory multiple myeloma by the end of the year. Pending regulatory feedback, we are planning to submit for regulatory approval in 2023.

An umbrella study in multiple myeloma investigating BCMAxCD3 in combination with various standard of care products and investigational candidate is now open to enrollment, while we plan to initiate an additional study in early lines of multiple myeloma later this year. As you can see, the pace of innovation in our oncology pipeline has been accelerated, building upon Libtayo as a foundation, with data readouts for novel mechanisms for cancer indications that historically have not responded to immunotherapy, including with our Regeneron Genetics' medicines where we in collaborate continue to progress our pipeline and discovery engine.

Our siRNA collaboration with Alnylam, a nonalcoholic steatohepatitis or NASH contains product candidates addressing various targets, including those discovered by the Regeneron Genetics Center. First data in NASH for ALN-HSD are anticipated this fall. We are progressing a second target, PNPLA3, into the clinic later this year, and we have recently identified an additional novel promising target for NASH SIP. As we just published in the New England Journal of Medicine, we found unprecedented association of very rare SIP loss of function variants with lower risk of liver disease.

In the largest association study examining protection from liver disease ever described, individuals with loss of function SIP bearing had about 53% lower risk of developing nonalcoholic fatty liver disease and about 54% lower risk of developing non-alcoholic cirrhosis. Regeneron and Alnylam are developing siRNA therapeutic candidate leads to advance to the clinic.

And with that, I will turn the call over to Marion.

Marion McCourt - Executive Vice President and Head of the Commercial

Thank you, George. Regeneron's commercial business achieved another strong quarter, demonstrating durable growth across our brands. We're building on the momentum of in-line brands, including EYLEA, Dupixent and Libtayo, and also accelerating the potential across our portfolio from new and anticipated future launches. Let me start with EYLEA. Second quarter global net sales grew 13% year-over-year at constant currency to $2.5 billion. In the U.S., EYLEA net sales exceeded $1.6 billion, a 14% year-over-year increase driven by prescribing demand with strong demand continuing into the third quarter.

EYLEA year-over-year growth significantly outpaced the category, gaining competitive share and further enhancing EYLEA's position as the anti-VEGF agent of choice for retinal disease. We continue to see durable growth based on patient flow and new patient starts, ongoing demographic trends such as the aging population and prevalence of diabetes support anticipated mid to high single-digit category growth for the foreseeable future. In diabetic eye disease, increasing diagnosis rates are also driving strong growth for EYLEA, with more than 55 million injections worldwide since launch and well over one million injections in the U.S. alone in the second quarter of 2022.

Physicians continue to recognize and prefer EYLEA's differentiated efficacy and safety profile. We are confident in our ability to continue to build on our leadership over the long term. Pending FDA approvals, there are potential incremental opportunities for EYLEA, including extending the dosing interval up to 16 weeks for diabetic retinopathy and treating in pre-term infants suffering from retinopathy of prematurity. In addition, our aflibercept eight milligram investigational program garnered significant enthusiasm from the retinal community and has the potential to significantly enhance the anti-VEGF treatment paradigm. Turning now to Libtayo.

Global net sales in the second quarter grew 25% at constant currency to $141 million with U.S. net sales of $91 million. Libtayo continues to grow across all approved indications, including non-melanoma skin cancers, where Libtayo is the leading immunotherapy treatment. In monotherapy non-small cell lung cancer, we are generating increased utilization across a broader number of prescribers. We are launch-ready for the potential chemotherapy combination approval, which will significantly expand the patient opportunity and physician choice for Libtayo in treating lung cancer.

Regeneron's full ownership of Libtayo presents many exciting opportunities across our current and future oncology portfolio. Key thought leaders recognize our growing commitment to oncology and of high interest in the potential for Libtayo combinations to meaningfully advance the standard of care in many cancer indications. We are taking a measured approach to expanding our global commercial footprint in key international markets to maximize the impact of our innovations to patients and Regeneron. These capabilities and infrastructure will support Libtayo, and over time, future medicines.

And now turning to Dupixent. In the second quarter global Dupixent's net sales grew 42% year-over-year at constant currency to $2.1 billion. Dupixent's performance was yield by strong uptake across all indications, with recent launches performing well across new diseases, age groups and geographies. In the U.S., Dupixent's net sales grew 38% to $1.58 billion. We continue to expand Dupixent's leadership position as the first line systemic treatment in atopic dermatitis.

There's robust demand for Dupixent across the spectrum of moderate and severe disease as well as across age groups. With the recent approval in children as young as six months, Dupixent is the first and only biologic medicine approved to treat moderate to severe atopic dermatitis from infancy through adulthood, and the launch in our youngest patients is off to a very strong start based on initiations. We are also preparing for the potential approval next month in prurigo nodularis, a dermatologic condition, where approximately 75,000 U.S. patients have no FDA-approved medicines and are most in need.

In asthma, Dupixent is the number one biologic prescribed by both allergists and pulmonologists. We continue to see strong growth in new patient starts and total prescriptions driven by Dupixent's differentiated profile, unique mechanism of action, ease of prescribing broad label and demonstrated efficacy and safety. In nasal polyps, robust demand continues, with Dupixent capturing the majority of market share and increased prescribing from ENTs. In eosinophilic eosophagitis, our first gastroenterology indication, Dupixent is the only approved medicine for adults and children aged 12 and above.

Early launch indicators have been favorable, with encouraging adoption from both allergists and gastroenterologists. In addition, we are expanding our outreach to educate patients and caregivers about Dupixent as a new therapeutic option that provides meaningful symptom relief. Turning now to Dupixent in markets outside the U.S. In the second quarter, net sales grew 61% on a constant currency basis to $510 million, driven by robust growth across all indications.

Regeneron continues to expand our presence in key international markets to bring Dupixent to patients. In summary, Dupixent is transforming the type two inflammatory disease landscape and has significant growth potential ahead, driven by further penetration in existing indications as well as from potential future indications. In conclusion, our commercial execution delivered solid results for the second quarter, bringing our life-changing medicines to even more patients. Our in-line brands continue to perform well, and new launches provide additional opportunities for sustainable long-term growth.

Now I'll turn the call to Bob.

Robert E. Landry - Executive Vice President, Finance and Chief Financial Officer

Thank you, Marion. My comments today on Regeneron's financial results and outlook will be on a non-GAAP basis unless otherwise noted. Regeneron's outstanding performance continued in the second quarter as our core business maintained a strong growth trajectory, and we have leveraged our strong financial position to complete two business development oncology transactions. Excluding global revenues related to the COVID-19 antibody cocktail, second quarter total revenues increased 20% year-over-year to $2.9 billion, demonstrating continued momentum across our business.

Second quarter total diluted net income per share was $9.77 on net income of $1.1 billion. Beginning with collaboration revenue and starting with Bayer. Second quarter 2022 ex-U.S. EYLEA net product sales were $870 million, up 13% on a constant currency basis versus second quarter 2021. Total Bayer collaboration revenue was $358 million, of which $340 million related to our share of EYLEA net profits outside the U.S. Total Sanofi collaboration revenue was $678 million in the second quarter of 2022, improved 55% from the prior year driven by Dupixent.

Finally, we recorded Roche collaboration revenue of $8 million related to Roche's sales of Ronapreve outside the U.S. We expect to record additional revenue from this collaboration in the fourth quarter of 2022. Moving now to our operating expenses. R&D increased 7% year-over-year to $690 million, driven by higher headcount in costs to support our expanding pipeline, partially offset by lower development costs for REGEN-COV. In the second quarter of 2022, acquired IPR&D was $197 million, which includes a previously-disclosed $195 million charge related to our acquisition of Checkmate Pharmaceuticals. SG&A expense increased 14% (sic) [15%] year-over-year to $418 million, primarily due to costs related to growth initiatives for EYLEA and higher headcount to support our growing organization.

Cost of goods sold decreased 73% year-over-year to $137 million primarily due to sales of REGEN-COV in the prior year that did not reoccur. Finally, the second quarter 2022 effective tax rate was 13.6% compared to 17% in the prior year. The lower rate is partially related to the non-recurrence of REGEN-COV sales. Shifting now to cash flow and the balance sheet. Year-to-date in 2022, Regeneron has generated $2.4 billion in free cash flow and ended the second quarter of 2022 with cash and marketable securities less debt of $11.3 billion. We continue to deliver on our capital allocation priorities.

Completing our acquisition of Checkmate Pharmaceuticals, the first acquisition of Regeneron's history and the purchase of Sanofi stake in Libtayo. In addition, we repurchased approximately $400 million of our shares in the second quarter of 2022, bringing our year-to-date total through July to over $1.1 billion. We continue to be opportunistic buyers where we see dislocation between our stock price and our intrinsic valuation. I will now discuss updates to our full year 2022 guidance driven by the closing of the Libtayo transaction.

We are updating full year R&D expense guidance to be in the range of $3.1 billion to $3.24 billion, an increase of $170 million at the midpoint from our previous guidance. Approximately 1/3 of the increase is driven by Regeneron now recording all R&D expense for Libtayo, which was previously shared with Sanofi. The remaining 2/3 reflects the recording of our full 50% share of antibody collaboration spend as incurred beginning in the third quarter of 2022.

Previously, our share of antibody collaboration expenses was only partially expensed in the period incurred, with the remaining share added to the antibody collaboration development balance. We are updating full year SG&A expense guidance to be in the range of $1.74 billion to $1.84 billion. The updated range reflects the inclusion of 100% of Libtayo commercial expenses, which were previously shared with Sanofi net of anticipated synergies. We are also updating full year gross margin guidance to be in the range of 92% to 93%.

The more favorable gross margin is due to the removal of the payment of Sanofi's share of U.S. Libtayo gross margin that was previously recorded in this slide. A complete summary of our latest full year guidance is available in our press release issued earlier this morning. Let me conclude by highlighting four important financial modeling considerations related to the Libtayo transaction. First, effective July 1, Regeneron will record 100% of the global Libtayo net product sales.

We previously recorded only U.S. Libtayo net product sales. Second, the Libtayo up-front payment, milestones and royalties will be recorded as an intangible asset on the balance sheet and amortized through cost of goods sold over the useful life of Libtayo. This amortization expense will be excluded from non-GAAP results. Third, as you may recall, we will now pay 20% of our share of antibody profits to reduce the antibody development balance instead of the previous 10% arrangement.

The quarterly development balance repayment going forward will be reflected in our P&L as incremental antibody R&D expense I mentioned earlier when discussing revised R&D guidance, with the remainder coming in the form of a reduction to antibody collaboration revenue. Therefore, the reduction of antibody collaboration revenue will be less than 20% of our share of antibody profits. As a result of the development balance repayment step-up, we expect to shorten the period to fully repay the development balance, resulting in an earlier and very significant inflection in collaboration profits in the other years.

Finally, in the third quarter of 2022, we will record a one-time development balance repayment per the Libtayo transaction agreement of approximately $55 million in addition to our regular quarterly repayments, which we recorded as a deduction within the antibody collaboration revenue line. In conclusion, Regeneron is performing well, and we continue to make investments in our business, supported by our strong financial position to drive sustainable long-term growth.

With that, I will pass the call back to Ryan.

Ryan Crowe - Vice President of Investor Relations

Thank you, Bob. Bella, that concludes our prepared remarks. We'd now like to open the call for Q&A with several callers in the queue. And to ensure we are able to address as many questions as possible, we will answer one question from each caller before moving to the next.

Bella, please go ahead and poll for questions.

Question & Answers

Questions and Answers:

[

Operator

[Operator Instructions] And our first question comes from the line of Mohit Bansal from Wells Fargo. Your line is now open.

Mohit Bansal - Wells Fargo - Analyst

Yes. Thanks for taking my question and congrats on the quarter and data. Maybe a question on high-dose EYLEA DME trial, especially with the loading dose, sticking to that. If you go back in the memory lane, it seems like the use of five loading doses only came along after the DRCR protocology because I couldn't find anything which - where, in the history, we suggest that you should use five loading doses. Could you please talk a little bit about that? And also, what is the realistic utility of fourth and fifth loading dose even for standard dose EYLEA, especially in the context of one year-long trial? Thank you.

George D. Yancopoulos - Scientific Founder, President, Chief Scientific Officer

Yes. Those are really interesting questions, and I get into the details of very specific points of the REGN. Many of these, as you point out, have not been directly studied in sort of head-to-head studies, so we would have to maybe offline discuss some of these issues. But as I said, details that would require a lot of experimentation maybe answered.

Ryan Crowe - Vice President of Investor Relations

Thanks, George. Bella, the next question, please.

Operator

Your next question comes from the line of Evan Seigerman from BMO Capital. Your line is now open.

Evan Seigerman - BMO Capital - Analyst

Hey, guys. Thank you so much for taking my question. I'd love for you to expand on kind of some of the next steps for 5, 6, 7, 8. What do you want to see in additional cohort eight patients, and even at potentially higher dose cohorts to move into a registrationally-directed trial? Thank you.

George D. Yancopoulos - Scientific Founder, President, Chief Scientific Officer

Yes. No, thanks. We are obviously very excited about these data that have long been coming. As you all know, we had to go through a very careful dose escalation starting with very low doses. But what we've now seen at the dose level 6, seven and eight have really been very exciting. I think that what we're going to be doing is we're going to be continuing to expand the number of patients at these dose levels. We're going to continue to evaluate the tumor activity as well as the safety, and we hope that we're going to see that the responses remain profound and durable.

While the safety, hopefully, most of them will resolve and be managed well. And if we continue down that path, we will, as you say, also continue to explore the dose levels and so forth. But the level of tumor activity, and balance by the safety events that we're seeing on doses, are occurring at levels where we think that they could be providing a new standard for benefit risk before this population. I think that it's important to point out and remind everybody, I mean, I said it, but just to say it again, the irAEs were only seen in the patients who had profound antitumor activity.

That is, the patients who didn't benefit did not really indicate in terms of higher level irAEs to have significant safety concerns. And that is, of course, what you want to see. But the patients who have the benefit, the safety is limited to those. You're not doing harm to the patients that you're not benefit. Okay. I guess, we're ready for the next question.

Ryan Crowe - Vice President of Investor Relations

Thanks, George. Bella, next question, please.

Operator

Your next question comes from Tyler Van Buren from Cowen. Your line is now open.

Leonard S. Schleifer - Founder, President, Chief Executive Officer

He must be on mute. We don't hear a question, but maybe we could take the opportunity to amplify you a little further and repeat what George said about the safety M.O. And you would think…

Tyler Van Buren - Cowen - Analyst

Can you hear me? Sorry, it's Tyler. Good morning. Thanks very much for taking the question. I wanted to ask about PULSAR and PHOTON, just a follow-up. Can you elaborate on the decision to randomize patients to the 12-week and 16-week arms prior to assessing the response to loading doses? Since patients can only be rescued during that first year or move down in dosing interval and not moved up to a less frequent regimen even though they might be doing well, doesn't this make the comparison to the [Indecipherable] study is difficult? And given this, how do you expect to communicate the data to the physicians when we see it?

George D. Yancopoulos - Scientific Founder, President, Chief Scientific Officer

Well, we have to be - we were somewhat confused by the whole of the business data, and it's meaning its intent. Because of the confusing study design, we're basically only have to see how well patients are doing. You don't shift them. So if you take your best patients and you shift them, for example, to a Q12 or Q16 regimen, and we say, X percent of patient concern this regimen, you're not really understanding how good your drug is and what percent of the patients can actually achieve that dosing regimen. We know, and we've already published on this that patients who do well can be dramatically extended.

We're trying to answer a very different question, which we think is going to be very, very important to the community, which is where we can truly achieve extended dosing. And whether you can prospectively put people into these dosing regimens and get substantial numbers of them to stay at the dosing regimen. Because we're giving the higher dose of EYLEA, which we believe has this ability to maintain more patients at these longer intervals. So we really believe that this would represent a significant clinical advance and would also clarify how to use these drugs as opposed to the prior somewhat confusing approaches.

Tyler Van Buren - Cowen - Analyst

That's helpful. And just a brief follow-up. On YouTube, if we're going to be able to be…

Ryan Crowe - Vice President of Investor Relations

I think we have to move to the next one. I'm sorry, Tyler. Bella, can we go to the next question?

George D. Yancopoulos - Scientific Founder, President, Chief Scientific Officer

We'll deal with that privately, Tyler. Sorry.

Operator

Sure. And your next question comes from the line of Salveen Richter from Goldman Sachs. Your line is open.

Andrea Williams - Goldman Sachs - Analyst

Good morning. Thank you for taking our question. This is Andrea on for Salveen. Can you walk us how to think about implications from the potential Medicare negotiation provision to high-dose EYLEA given that there is no distinct IP there, but there will be a biosimilar for the regular dose by mid-'24? Thanks so much.

Leonard S. Schleifer - Founder, President, Chief Executive Officer

Yes. It's a complicated question that until we see the final language in how it's interpreted and how it's actually implemented, as to whether and how we file for the high dose, whether or not there'll be separate considerations for high dose versus the standard dose EYLEA. If there was - if it turns out that there are - if it turns out that there are separate - we get a separate BLA, obviously, you get - I can't remember what if that says now 11 or 12 years before this comes into play.

And based on our current understanding of the bill, we believe that a new BLA would constitute a new biologic product, and therefore, the eight milligrams would not be subject to price negotiations in years. But we have to see what the final bill looks like and how it's interpreted. So we're as anxious to see some of that as you or Salveen. So we will keep you informed about thinking as the bill is finalized and starting to be interpreted.

Ryan Crowe - Vice President of Investor Relations

Thanks, Len. Bella, next question, please.

Operator

Yes. Your next question to the line of Matthew Harrison from Morgan Stanley. Your line is now open.

Matthew Harrison - Morgan Stanley - Analyst

Great. Good morning. Thanks for taking my question. I was wondering if you could comment maybe a bit more broadly on costims, and how the impact of today's data makes you think about investment in additional tumor types or a broader investment across costims and other combinations? Thanks very much.

George D. Yancopoulos - Scientific Founder, President, Chief Scientific Officer

That's a great question. I think you bring up a great point. And I think those of us who have been in this field now we're, of course, so excited by the early promise of immunotherapy, checkpoint inhibitors, and particularly PD-1 antibodies. But of course, over the years, it's been recognized that only a small percentage of tumors, even in responding - even in the most responsive cancers, not all the patients respond and for many tumor classes, as we just saw with Merck's announcement, their failure today, in many classes, there's almost no detectable activity.

So the holy grail in the field that people have been looking for is an answer to the question of how do you activate immunotherapy in all of these cold tumors, Which is, unfortunately, the vast majority of cases, both solid tumors and hemologic malignancies. And so we went down this path based on the science that we could add the second signal, Signal 2, to the first signal that could activate T cells. And these preliminary data suggest that, that hypothesis might be right, and that we are on the way to this holy grail, that this is, we believe, very early data, we have a long way to go.

But it's a spectacular indication that we have done or we are in the midst of doing, on the path doing exactly what we set out to do, which is to turn immunotherapy cold tumors into hot tumors with dramatic antitumor activity. And the implications here based on all the preclinical data suggest that this is going to be broadly applicable. And as you all know, we have been developing a very broad costimulatory pipeline across many, many tumor classes, and several of them are already in the clinic.

I mentioned we have the prostate data. We have ongoing studies with a costim for ovarian cancer. We have other costims that are in the clinic for - and we have other costims that are going to be entering into the clinic over the next short period of time. These are going to cover all sorts of cancers from the lung cancers that don't respond to hematologic malignancies, and so forth and so on.

So we really think that this could be groundbreaking and taking immunotherapy now to the next level where all of us in the field, we're hoping it was going to go with the early advances with checkpoint inhibitors, and have been frustrated over the, obviously the last decade or so that we haven't been able to get there. This may be the way we get there for the field. We've a very broad pipeline of costimulatory bispecifics.

By the way, we believe this validates the concept of the combinations, not only with Libtayo and the PD-1 class, but also with our CD3 class of bispecifics because it suggests that the preclinical data, which is so strongly supported now with this clinical data, might also be very predictive for that class. So a lot of exciting possibilities across very broad areas, diverse solid tumor hematological malignancies. This is, I think, could represent the next breakthrough for immunotherapy.

Leonard S. Schleifer - Founder, President, Chief Executive Officer

Yes. And Matt, it's Len. Let me just add to what George said. In terms of the investment side, we're prepared and we're able to make the investment across many different areas that George is talking about. And having under one roof all the agents, owning all of Libtayo, having the variety of costims, having a variety of the CD3 bispecs and having all that knowledge, we think - and the ability to invest puts us in a really terrific position. It is early going. We have to work through the safety.

But to me, it's sort of reminiscent of once you start to see the excitement around the CAR T cells. And the CAR T cells actually provide a pretty good lesson in that they give very high levels of activity, response rate, 75% in some tumors are higher. And when you get those very high response rates, you also got very high levels of these immune reactions. You had - and you look at the labels, you'll see 25% grade three neurologic adverse events and a whole bunch of other, not to mention, all the cytokine release syndrome. So I think that this is sort of an equivalent stage.

We've got this tiger by the tail, I really believe, and George has described it well. And the amazing thing that should be echoed is that the preclinical data was extremely valuable. So Regeneron is not a company that just has all these molecules that we've acquired from others. These are home-going molecules, home tested, home validated, et cetera. There's a whole collection. We couldn't be more excited. I could keep going on, but maybe I'm getting waved off. We should take the next question.

George D. Yancopoulos - Scientific Founder, President, Chief Scientific Officer

No. I just want to add and build on what Len said. I think just like you said, in some ways, the CAR Ts in terms of high efficacy, particularly in hematologic malignancies, because that's where it's seen. High efficacy seen along with the AEs in terms of the responding patients. That's a good analogy. But I do have to point out the many differences. These are off-the-shelf reagents, okay, which God forbid, if there is a safety issue, it can be stopped.

And it's much easier as we're already demonstrating to create a whole pipeline across a whole variety of broad cancers. And unlike the CAR T world right now anyway, these are dramatic effects in solid tumors, which were never really seen before by any other modality. So this is actually pretty exciting. There are analogies there in terms of dramatic efficacy, but also very important differences here that establish this as a potential breakthrough new class.

Ryan Crowe - Vice President of Investor Relations

Okay. Thank you, George and Len. Next question, please, Bella.

Operator

Sure. Your next question comes from the line of Chris - Tim Anderson with Wolfe Research. Your line is open.

Tim Anderson - Wolfe Research - Analyst

Thank you. A question on the five, six, seven, eight data. You report out one CR, but no other response rate data using RECIST criteria. So I'm wondering if there's anything else you can say about tumor shrinkage beyond that one CR in those upper three cohorts? And then to clarify, you mentioned a hosted grade three AEs in the press release. And some of those, to me, don't seem like the classic immune-related AEs. So are you - I'm hoping you can clarify which of those you consider to be irAEs, maybe you consider all of them to be? Thank you.

George D. Yancopoulos - Scientific Founder, President, Chief Scientific Officer

I think we've given a lot of detail, and we're going to be giving a lot more details, obviously, in the upcoming meetings. Suffice it to say that as I mentioned, for most of these patients actually, or many of these patients, they don't have lesions outside of the bone, which is why we use PSA as the indicator of total disease activity because you don't have that many lesions, okay? So that's the end point of why we're focusing on the PSA. We do believe that many of the irAEs are the sort of irAEs that you do see with both PD-1 therapy, and as Len mentioned, also with CAR T therapy.

And I think we indicated every single grade three that we had and indicated that actually, even though these are very early data in the treatment of most of these patients, many of these are actually already resolving or resolved. And we're going to continue to follow these patients and look for, hopefully, as we remember cohort 6, that one patient, the reason we highlighted them is they were the first responding patients, and we've now had almost a year follow-up, and we have this very impressive durability of response there.

The other cohorts are much more recently treated, and that's why we're not giving that much follow-up because these are patients who are in the very early months of being treated. But obviously, you hear it in our voices probably, those of us who have commented. We think this really has the potential to be game changing the field of immunotherapy and taking immunotherapy to the next level, and also game changing for our oncology program and for our company.

Ryan Crowe - Vice President of Investor Relations

Thank you. Bella, the next question, please? I think we have time for two more.

Operator

All right. question comes from the line of Chris Raymond from Piper Sandler. Your line is now open.

Chris Raymond - Piper Sandler - Analyst

Hey. Thanks. Maybe back to EYLEA in the high-dose format for a second. So our checks have indicated a pretty good chunk of Vabysmo patients are actually EYLEA patients, and specifically, EYLEA patients who are on a higher frequency dose regimen. I guess maybe a two-part question here. First, maybe talk about the plan to sort of mitigate this either before the high dose format or even after?

And I guess is the plan with the high dose, one would expect that switching paradigm for the high-dose EYLEA would be easier than Vabysmo? Is that sort of part of the plan? And then the second part is our checks also indicate surprisingly low awareness of this high dose format among docs. Are these signals at odds with what you're seeing? Or is that correct? And outside of actually just having the data presented.

Leonard S. Schleifer - Founder, President, Chief Executive Officer

[Indecipherable] - By the way, we don't market products before they're approved. So it's not surprising that there is a non-awareness of a product that's an investigational product. Marion can comment on the…

Marion McCourt - Executive Vice President and Head of the Commercial

Sure. Let me take a start on some of the situation in the market, and perhaps George will add to that. First, let me comment that obviously, we presented today very strong results on the growth of EYLEA, standard of care in the marketplace both in the U.S. and the worldwide information. Today, in the branded category, U.S. anti-VEGF category, we have 75% of the branded market. We are approaching 50% of the overall market. So truly, EYLEA is the standard of care. It's probably best that faricimab, organization comment on where their product is being used.

I'll comment anecdotally that early days, the response has been fairly muted, fairly low-grade use in concentrated accounts rather than market wide. As for the future, we're very excited and optimistic that the aflibercept eight milligram will represent a new standard of care with true durability of dosing and the same type of efficacy and safety that we see with EYLEA. So we're really excited. And certainly, our clinical organization has put together trial designs to truly test the durability of the product, and then we'll allow the commercial organization to determine what the best strategy is for launch if and when we get FDA approval.

George D. Yancopoulos - Scientific Founder, President, Chief Scientific Officer

All right. Let me just add to that, that it's important to point out that the reason why EYLEA has become the leading anti-VEGF agent, branded VEGF agent, is because it allows most of the EYLEA patients to go on longer interval dosing and have - and be very satisfied with the response. Now of course, as with any disease and situation, not every patient is going to do perfectly well. And we know that there's a small percentage of patients, who do need more frequent EYLEA.

And of course, if one has a new untested agent that doctors haven't seen, their hope in the place that they would first try in the small percentage of patients who don't - who are not doing well. And of course, that's why it's being used in that setting. Now our goal scores with the high dose of EYLEA is to take now the best-in-class agent and hopefully produce even better results in terms of allowing the small percentage of patients, who are being dosed more frequently or even the patients who are now on 8-week regimen or 12-week regimen to go to more extended regimen, and that's the whole point of the design in the study.

So I don't think there's any surprises that it's a small percentage of very hard-to-treat patients where somebody would try an untested agent that they're hoping might work better. But we have a real logical rational way that we are now taking EYLEA, bringing forth this high-dose formulation and hope to extend the benefits that we're already seeing with this tried and true in terms of both safety and efficacy reagent, and even expand it and get even for the small percentage of patients longer dosing and even extend maybe everybody else.

Ryan Crowe - Vice President of Investor Relations

Okay. Thanks, George. Bella, last question, please.

Operator

Sure. And your last question comes from the line of Carter Gould with Barclays. Your line is now open.

Carter Gould - Barclays - Analyst

Hi, good morning. Thanks for taking the question. I guess now that you fully own sort of Libtayo, can you update us on kind of where you stand on a subcutaneous formulation, given what we've seen data from some of your competitors there and the importance of that to kind of keep pace? And I guess, looking down the road, then can you talk about the feasibility of potentially co-formulating Libtayo with one of these bispecifics - costimulatories? And if that's even feasibly possible, recognizing it's a ways away? Thank you.

Leonard S. Schleifer - Founder, President, Chief Executive Officer

You can imagine we're working on subcu. We'll give you some details, I think, down the road later this year. In terms of co-formulation, we have a strong view that if you're doing it for gamesmanship or patent work and all that kind of stuff, that's one thing. But we - what we're more focused on is getting the optimal dosing and the optimal regimen, and they're not likely to be the same in many of these settings. It's only useful if you're going to try to have a single regimen that covers both. So - but we're a long way from worrying about that. We're far more focused on the fact that we've turned cold to hot, which is a big damn deal, at least in our eyes.

George D. Yancopoulos - Scientific Founder, President, Chief Scientific Officer

And obviously, it hasn't escaped yours or I'm sure anybody's attention that now, with this just appreciated new data where it looks like we're on the way of turning cold tumors to hot in combination with Libtayo, we are, in retrospect, very happy that we now have taken on sole ownership of Libtayo.

Ryan Crowe - Vice President of Investor Relations

Thanks, Len and George, I think that's all we have time for today. Bella, could you please conclude the call?

Operator

[Operator Closing Remarks.]

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Q2 2022

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