Thank you, Todd, and thank you for joining our call today. In today's remarks, we will discuss some of the factors that contributed to our previously announced revenue shortfall and revised full-year guidance. We will also discuss the steps we are taking to return to revenue growth and why we are confident in the assumptions underlying our updated financial forecasts. Finally, we will share our re-focused priorities for 2024, which we believe will position us to build PacBio into a sustainable, cash-flow-positive company with the ability to execute in any macro environment. While we forecast near-term growth to be lower than our original guidance for 2024, we have never been more confident in the value of our platforms, our long-term growth potential, and our ability to capture market share in the multi-billion dollar sequencing opportunity. But first, let's recap the first quarter. Consistent with our pre-announcement on April 16, revenue of $38.8 million for the first quarter was below expectations due to an increasing number of customers delaying instrument purchases and softness in consumable shipments. Based on the first quarter results and our expectation that some of these external factors will likely persist throughout 2024, we expect full-year revenue to be in the range of $170 million to $200 million. The instrument shortfall primarily resulted from elongated customer purchasing cycles, as the median sales cycle for Revio instrument purchases increased more than we expected in the first quarter of 2024. More specifically, we believe that the sales cycle increased primarily because of uncertainty surrounding the timing of funding for new capital equipment, particularly in the United States and China, smaller Sequel II and IIe customers who are planning to upgrade to a Revio are waiting for the samples to drive that upgrade, and an increasing proportion of the sales pipeline is comprised of new customers in the first quarter of 2024, which have proven to have longer sales cycles compared to those existing PacBio customers. While consumable revenue grew 15% year-over-year, it was also below our expectations. We believe this was primarily attributed to the slower-than-expected ramp-up in sequencing by our small and mid-sized customers, many of whom are new to PacBio; the time for new Revio customers and new projects to reach full capacity has been slower than we anticipated; sample delays impacting sequencing volume in the quarter for certain large customers; and some smaller service providers in China operating at lower utilization as a result of the challenging funding environment. In Q1, more customers than we expected utilized their Revio systems at less than 20% capacity. Many of these are newer customers and the average age of the systems in this category was less than 4 months, which we believe indicates that these customers are still early in their ramp-up. The pace of the ramp is dependent on a number of factors including, the timing of sample availability, lab readiness, and funding, among other reasons. We are putting measures in place that we believe will help these customers ramp to their full utilization as timely as possible, and help drive consumable growth going forward. Moving on, we are implementing several strategies aimed at accelerating instrument and consumable revenue. First is an intense focus on the customer to drive new sales opportunities, close existing deals, and accelerate consumable revenue ramp-up time. And among other activities, this involves, launching our PRISM customer-focused roadshows. These events include discussions and workshops with PacBio users and key opinion leaders in genomics where they'll engage and share the groundbreaking science that Revio is enabling. We're organizing events across 6 global cities with approximately 1,000 registered attendees representing over 500 organizations many of whom we believe will become future Revio users. We're reducing the stands and layers in the commercial organization, which will allow leadership to get closer to and more involved in the sales process. We're also establishing tiger teams to actively work with low-volume customers to accelerate their Revio ramp and collaborate with them to secure samples to feed their sequencer and we're continuing to collaborate with customers to demonstrate the value of HiFi long-read sequencing to drive long-term durable revenue. Second, we're addressing the upfront CapEx barrier some customers face when assessing HiFi, and we're doing this by implementing promotions that ease customers' upfront CapEx requirements and we're doing this in ways that preserve PacBio's overall economic value. These promotions have already created more funnel opportunities, which we believe will close this year, and we're focusing our product development on a benchtop platform, which will allow for a lower CapEx entry and upon launch, potentially open up PacBio HiFi sequencing to hundreds of new global customers. Third, we're expanding the market and applications addressable with Revio and HiFi. As I'll discuss shortly, we are investing in developing library prep and informatics solutions around Revio that enhance the platform's value proposition. These launches include PureTarget for targeted clinical research applications and Kinnex for transcriptomics, and 16S metagenomics, and we're also developing future enhancements that we believe will further reduce DNA input requirements below one microgram of DNA for a 30x whole human genome, potentially opening up more existing samples and new projects to HiFi sequencing. Looking ahead, our pipeline of sales leads has continued to grow each quarter since we launched Revio. We believe our current sales pipeline is sufficient to at least support the midpoint of our guide of 120 Revio systems, which provides further confidence in our revised revenue targets for 2024. There's no doubt that PacBio and our industry are facing increasing headwinds this year. However, we remain incredibly optimistic about our business and the prospects for long-read sequencing. Our powerful sequencing technologies continue to play an important role in revolutionizing genomics, and the demand for, and interest in our products indicates the tremendous market opportunity ahead. One encouraging indicator is the amount of data customers generate with their sequencers. Growth in this metric demonstrates increasing utility and broader acceptance of long-read HiFi technology. In the first quarter, total data generated from PacBio long-read sequencers grew 2.5x from the first quarter of last year. This growth is a testament to the overall interest in Revio and the continued market share gain for long-reads. As of March 31st, just over -- just 1 year after commercialization, we surpassed 200 cumulative Revio shipments, marking the fastest installed base ramp in PacBio history. From a throughput perspective, this has the same power as over 3,000 Sequel IIe's, our previous generation platform. This rapid scale-up demonstrates our customer's desire to sequence using PacBio HiFi more than ever, but it will take some time for them to migrate projects and samples to this newfound capacity. We've been exceptionally pleased with the number of new customers adopting Revio, as 57% of the systems shipped in the first quarter went to new PacBio instrument customers. These customers included the University of Tartu, host of Estonia's National Biobank. The team selected Revio exclusively over other short and long-read technologies to sequence 10,000 whole human genomes as part of their goal to adopt personalized medicine at scale and understand the underlying genetics of health, disease, and treatment outcomes. It also includes the first Revio in Latin America which will be used by a customer in support of a 1,000-sample human genome project. These new Revio customers add to the existing multi-thousand sample projects that we've shared over the past year, such as large-scale human genomics program in Singapore which is expected to start sequencing this quarter and continued sequencing for the All of Us and Million Veterans Program in the United States. We're also pleased to announce that Ambry Genetics has joined the collaboration with the GREGoR consortium and the University of California, Irvine and aims to sequence up to 7,000 long-read HiFi genomes over the next three years, focusing on developing new insights into rare disease etiology and treatment. Revio enables more than just large-scale research studies. Hospitals are increasingly seeking to implement Revio to achieve unprecedented insights into genetic and rare disease. It includes existing PacBio customers like Seoul National University Hospital, which utilized one of our recently-announced instrument promotions and plans to use HiFi long-read technology to improve its testing capabilities in rare disease and cancer. Also, a leading pediatric hospital in Canada purchased a Revio; its first PacBio system to sequence 1,500 rapid whole genomes of critically ill infants. HiFi was the clear choice for this clinical-oriented customer as the other long-read sequencing technology proved too high in error rate. To support these customers, we are continuously enhancing our software, launching new library prep, and sample prep solutions which make PacBio sequencing more turnkey and more accessible than ever. Additionally, we believe these new products will help contribute to a recurring revenue stream outside the core SMRT cells and sequencing reagents used to run Revio. We've seen tremendous interest in our recently launched Kinnex full-length RNA kits. Launched in the fourth quarter of 2023, we've booked orders for 160 customers as of March 31, totaling over $1.5 million. The PacBio PureTarget panel was launched and began shipping in late March, allowing for comprehensive characterization of repeat expansions. Expansions of repetitive DNA sequences have been linked to over 50 monogenic disorders and cancers. This kit enables customers to interrogate some of the most critical and hard-to-sequence genes related to these diseases and multiplex up to 192 samples on the Revio system. Combined with our TRGT repeat expansion caller and Nanobind DNA extraction kit, it allows for an easy and scalable workflow to capture repeat expansions, bringing customers from sample to answer in 3 days. We just started shipping these kits in March, and we are already seeing great interest from customers ranging from pediatric hospitals to large commercial testing labs, biopharma, and academic labs. Launched in the first quarter, our HiFi Prep and Plex library kits further enable our customers to automate and scale on Revio. These kits allow Revio customers to prepare up to 96 libraries at a time at a lower cost per library, and some of our largest customers are adopting these kits to help them further scale their projects. We expect the kits to be particularly beneficial for microbial genome and low-pass large genome sequencing, where library prep costs are a large percentage of the overall workflow cost. The Nanobind PanDNA kit developed from the Circulomics technology supports a high molecular weight extraction from cells, bacteria, blood, tissue, insect, and plant nuclei. This new product consolidates the capabilities of our existing sample-specific offerings into a single solution for DNA extraction. Since we acquired it in 2021, over 1,000 customers have ordered Circulomics kits. This product line helps us deliver solutions to the thousands of lower throughput long-read users and can potentially serve as a funnel for our future benchtop long-read sequencer. We continue to be pleased with the traction of our sample extraction offerings, and excluding large OEM purchases from 1 customer, the first quarter was our most successful quarter for sample prep. Finally, our Version 13 Software continues to improve the Revio user experience. Nearly all customers are utilizing the recently launched adaptive loading feature, which improves customer experience by preventing overloading of the SMRT cell, allowing customers to load DNA more confidently and achieve higher and more consistent yields. With V13 enabled on almost every Revio, the mean yield per SMRT Cell for whole genome sequencing runs in 2024 is approximately 5 gigabases higher than in 2023. We continue to see success with our Onso platform. Instrument shipments grew again in the first quarter, and the installed base now spans 6 continents. We've completed our consolidation of Onso instrument and consumable manufacturing into our Menlo Park facility, which allows us to fully leverage our operational infrastructure. So now, let's look ahead and discuss our 4 strategic priorities going forward. First, improving our commercial execution to drive adoption of both Revio and Onso. We are placing a greater focus on the value proposition of HiFi sequencing and increasing collaboration with customers, purchasing departments, and decision-makers. We are also working to improve our partnership with customers, post-instrument purchase, to ensure that they are getting samples into their lab to feed their Revio. With respect to Onso, in the first quarter, we scaled the manufacturing of the platform, enabling us to deliver instruments based on demand much more rapidly, which will help drive our ability to sell the system. Additionally, we've identified opportunities to drive manufacturing improvements and lower the unit cost of consumables, which gives us the flexibility to lower the list price on Onso flow cells and reagents to as low as $8 per gigabase. With these advances, along with a more focused and targeted selling effort, we believe that we can be very competitive in this market. Second, continuing the development of new platforms that are expected to broaden our product offering and drive our revenue growth. We continue to believe that developing a multi-platform portfolio is important for our success, enabling us to reach more customers and drive technology adoption. While we expect the Revio platform to be the primary contributor to revenue over the next few years, we are aggressively pursuing the development of a long-read benchtop system, which will have a much lower capital cost, enabling us to reach a new subset of lower throughput customers and provide flexibility to existing Revio customers through fleet expansion. We believe that this instrument will address a market of over 1,000 potential customers. We are also developing a high-throughput short-read platform that is expected to enable us to serve high-throughput labs with our leading Sequencing by Binding technology. This highly accurate technology is perfect for needle-in-a-haystack applications such as liquid biopsy. We believe it will be highly competitive in terms of both throughput and cost relative to other high-throughput offerings. The addressable market for this platform is estimated to be over $1 billion per year. We are also continuing to develop our next generation SMRT Cell. This cell is expected to power a new, extremely high-throughput long-read platform, enabling throughput dramatically higher than that of the Revio system. Third, we're implementing projects to improve our gross margin and drive manufacturing efficiencies. A cornerstone of our path to cash flow breakeven is our ability to improve gross margins through revenue mix and unit cost reduction. We've already reduced the production cost of both the Revio instrument and a 25M SMRT Cell and expect more improvements this year and beyond. Outside of our next-generation platforms, this is a critical R&D and operations effort that we will continue to invest in. Finally, we're reducing annualized run-rate operating expenses. Last week, we began implementing our restructuring plan to reduce operating expenses. As part of that, we made the difficult decision to reduce our total headcount by approximately 25%, or 195 employees, and close our San Diego office. Virtually all functions within the company were impacted. The reductions are being made based on our refocused priorities that I discussed above. As a result, I believe that we have the resources required to achieve our near-term priorities. With these reductions, along with other non-headcount related savings, we now expect to lower our non-GAAP operating expenses on an annualized run rate basis by more than a $75 million reduction by year-end. This is above the range we provided in our pre-announcement on April 16. We believe that it positions us to deliver on our commitment to our plan to create a sustainable, cash-flow-positive company by the end of 2026 and enable us to continue to provide scientists with some of the best technologies that push the boundaries of biological discovery. And with that, I'll pass the call to Susan to discuss our financials. Susan?