Thank you, Jason, and good morning, good afternoon, everyone. Thanks for joining our first quarter results call. Here with me today are Ryan Preblick, our Chief Financial Officer; and Christian Heidbreder, our Chief Scientific Officer. I will start the call with an overview of the results for Q1 and a progress report against our strategic priorities. Ryan will then provide more detail on the first quarter results and updated fiscal year 2023 guidance. And then following that, we'll move to Q&A. Turning to the key messages, we delivered an excellent start to 2023 driven by strong execution against our profitable growth strategy, which is primarily focused on increasing SUBLOCADE's prescriber depth within our organized health systems. Our first quarter total net revenue grew 22% led by SUBLOCADE. The strength of our top line allowed us to absorb incremental growth investments behind SUBLOCADE in the U.S. Justice System channel while still delivering operating leverage. As a result, our adjusted operating profit grew 31% in the quarter. We also successfully completed the acquisition of Opiant at the beginning of March. This important strategic step strengthens our addiction portfolio with the addition of OPNT003, which we expect to become the next generation agent for opioid overdose reversal subject, of course, to regulatory approval by the FDA. I'm also pleased to report that we fully integrated the Opiant commercial and R&D teams. And with our combined experiences, capabilities and footprint, our teams have hit the ground running as we prepare for potential FDA approval and then launch. You'll also know that we've updated our fiscal year 2023 guidance for the Opiant acquisition as well as our updated share assumptions for film. As a result, we've increased our fiscal year 2023 net revenue expectations. Ryan will share more detail on these and other fiscal year 2023 guidance items in a moment. Finally, a quick note on the legacy litigation, which I know is top of mind among our stakeholders. While I'm constrained in what I can say due to the ongoing nature of these matters before the court, I can confirm that discussions continue with the parties as we actively try to bring greater certainty for our shareholders at an appropriate value. Doing so will allow us to focus all of our efforts on meeting the important needs of patients suffering from substance use disorders and serious mental illness. Moving next to our report card for the first quarter, we continue to make excellent progress against our strategic priorities. First, SUBLOCADE net revenue of $132 million grew 12% versus the previous quarter and 55% versus Q1 last year. Sequential dispense growth was 16%. This strong double-digit performance was driven by our ongoing strategy to increase prescribing depth in the 500-plus organized health systems that we've accessed. Organized health systems now account for approximately 80% of SUBLOCADE's growth. Additionally, we saw an increased contribution to SUBLOCADE net revenue from the U.S. justice system channel as more facilities were activated. You'll also note that SUBLOCADE patients at the end of the first quarter were approximately 95,000. This is just over one-third of the way toward the estimated 270,000 patients we are targeting to achieve our $1.5 billion plus net revenue goal for this important treatment. While we are pleased with our progress, it still only represents 3% of the 3.1 million people diagnosed with opioid use disorder. Moving next to diversification and starting with PERSERIS, we continue to see unit growth in volume and the number of new HCPs prescribing across our territories. Net revenue of $8 million reflects growth of 60% versus Q1 2022, but was negatively impacted by wholesaler destocking when looking at the quarter sequential comparison. Overall, we are pleased with the KPIs which remain strongly positive, including underlying dispense growth and sample demand across inpatient acute care psychiatric facilities and outpatient clinics. Taken together, we remain confident in our full year net revenue outlook for PERSERIS. Turning to ex-U.S. net revenue, strong growth from new products, which include both SUBLOCADE and SUBOXONE Film, drove the 5% increase in overall Rest of World net revenue. SUBLOCADE continued to make solid progress while net revenue contribute -- with net revenue contribution of $9 million. We continue to see strength in our ex-U.S. markets, including the Nordics launch, where we launched the SUBLOCADE in late 2022. We look forward to launching SUBLOCADE in Germany in May and remain focused on returning our Rest of World business to sustainable growth with SUBLOCADE and SUBOXONE Film. Lastly, on diversification. As I mentioned before, we successfully closed and integrated the Opiant transaction. And in a moment, I'll provide a bit more detail on our plan for OPNT003. Turning to our pipeline. We are pleased to have brought on board Opiant's asset portfolio and team, which gives us significant addiction medicine development experience and expertise across a broad array of delivery platforms, including depot, oral and now nasal delivery technologies. Under Christian's leadership, the R&D teams have come together nicely and are moving at pace to advance our key programs. By combining our portfolios, Indivior now has more robust pipeline to address patients' most urgent needs across the continuum of care for substance use disorders. Our fourth strategic pillar is optimizing our operating model and capital allocation. Here, our financial position remains strong despite cash outflows associated with the Opiant acquisition and completion of our second share buyback program. Finally, with regards to the additional U.S. listing of our shares, we look forward to completing the necessary regulatory requirements and expect to affect NASDAQ listing in June. Before concluding my remarks, let me provide a brief status update on Opiant. We closed the acquisition on March 2 and moved quickly to embrace Opiant's teams. It's now nearly 2 months into our combination and I'm very pleased with how we've come together as one company focused on patient needs. Clearly, our most immediate and compelling opportunity is OPNT003, which has a PDUFA action date of May 22. At this point, I have to make the standard cautionary comment that this is entirely subject to FDA approval. Nevertheless, assuming this proceeds as we anticipate, we are in full planning mode for a Q4 launch. As such, our updated fiscal year 2023 guidance does reflect incremental investment for launching OPNT003 later this year. Given the recent interest, I'd like to just take a moment to address the recent OTC approvals for naloxone. We certainly applaud efforts to increase access for all FDA approved medications. To be clear, OPNT003 will not be an OTC product, if approved, and therefore, our primary launch efforts will be squarely focused on the public interest markets. This includes law enforcement, first responders, departments of health, schools and corrections and so on. This approach reflects the unique profile of OPNT003, which was developed specifically to address the epidemic of overdose deaths arising from misuse of fentanyl and other synthetic opioids. Importantly, we believe we can cover all these key national public interest call points with a relatively small, focused and efficient field force. Next, to preempt your questions on pricing, we are still in the process of finalizing our strategy, but we will certainly look to price responsibly while considering the innovative nature of the product. Lastly, while our fiscal year 2023 guidance does not assume material net revenue contribution from OPNT003, given the anticipated launch timing late in the year, we continue to be confident in 003's peak net revenue potential of $150 million to $250 million and continue to expect it to be accretive to earnings after the second full year of launch. To conclude my formal remarks, the team has delivered an excellent start to the year with strong top line growth on SUBLOCADE and PERSERIS and continued return to growth in our ex-U.S. markets. We are looking forward to the launch of OPNT003, subject to approval and have raised our fiscal year 2023 net revenue guidance. And last but not least, we are working diligently to remove uncertainty for stakeholders as we seek to resolve legacy legal items so that we can exclusively focus on achieving our business goals. With that introduction, I will turn it over to Ryan.