Good morning. I'm pleased with our overall third quarter results, which were highlighted by high single-digit organic revenue growth, consistent with our long-term targets and operating margin expansion that represented a positive step towards achieving our 20% target in 2021.Market demand for our leading early-stage portfolio has remained strong throughout the year. While biotech funding levels and the number of molecules approved by the FDA may end the year slightly below peak levels, industry fundamentals and scientific innovation remain as robust as we've ever seen. And outsourcing is key to our clients' success. This is promising to be another solid year for the biopharmaceutical industry as clients discover solutions for previously unmet medical needs using new technologies like cell and gene therapy and immunotherapies and rely on CROs like Charles [Indiscernible] to support the research programs. We have no indication that the relationships with our clients or their spending levels have been affected by the geopolitical rhetoric involving the trade war and [drug pricing]. And we firmly believe that our clients will continue to partner with Charles River in order to bring new drugs to market faster and more efficiently for the patients that need them.Let me give you the highlights of our third quarter performance. As you know, we issued preliminary third quarter results on October 21, in conjunction with our successful issuance of $500 million of senior notes, about which David will provide more details shortly. Our actual third quarter results were at the higher end of the preliminary ranges that we've provided. We recorded revenue of $668 million in the third quarter of 2019, a 14.1% increase over last year. Organic revenue growth was 7.9%, with each of our business segments contributing meaningfully. From a client perspective, biotech continued to drive revenue growth. While acknowledging that third quarter revenue growth was slightly below the outlook that we initially provided in late July, we were pleased with the high single-digit organic growth rate, which is consistent with our long-term target. I will provide more details on each of the business drivers shortly.The operating margin was 19.4%, a 60 basis point increase year-over-year and above our prior outlook. This improvement was driven by the Manufacturing Support and RMS segments and more than offset headwinds from the Citoxlab acquisition, the Biologics capacity expansion and a large insourcing solutions contract. We believe that the third quarter margin expansion demonstrates our ability to leverage the investments that we have made in staff, capacity and infrastructure to accommodate the robust growth in a more scalable and efficient manner and provides a line of sight to our 2-year goal of 20%. With the significant investments largely behind us, coupled with our continued focus on driving greater efficiency, we expect the operating margin in the second half of the year will be higher than the first half, resulting in a full year operating margin that is approaching last year's level of 18.8%.Earnings per share were $1.69 in the third quarter, an increase of 16.6% from $1.45 in the third quarter of '18. The increase was due primarily to higher revenue and operating margin improvement. From a guidance perspective, we now expect organic revenue growth for 2019 to be in a range from 8.25% to 8.75%. This has been moderated from our prior outlook, but still well within the high single-digit range. The organic growth outlooks for each of the business segments are being narrowed but remain within the previous ranges for the year. We do not believe the narrowing of our organic growth range demonstrates any diminution in market conditions as we believe both market demand and our fundamental business trends remain robust.We continue to be well positioned for organic revenue growth in 2019 to be near the 8.7% reported last year, the highest level in a decade and consistent with our long-term growth target in the high single digits. As a result of the third quarter operating performance, non-GAAP earnings per share guidance for the year is being narrowed to the upper end of the prior range to $6.50 to $6.60. This represents 12% to 14% growth from $5.80 last year.I'd now like to provide you with details on the third quarter segment performance, beginning with the DSA segment. The DSA revenue in the third quarter was $420.1 million, a 7.9% increase on an organic basis, with both the Discovery Services and Safety Assessment businesses contributing. We believe that high single-digit organic growth in DSA segment will continue to be driven by demand for our outsourced services as global biopharmaceutical clients choose to partner with Charles River rather than build and maintain capacity in-house and biotech clients leverage our expertise because they have limited or no internal capabilities. To meet our clients' needs, we have focused our business on unmatched scientific expertise, rapid turnaround times, flexible creative solutions and the ability to accommodate the increasing complexity of our clients' research programs.Our business model has made us an attractive partner for large pharma, biotech, academic institutions, governmental agencies and NGOs, but it is clear that we have become the principal partner of choice for biotech clients of all sizes. Biotechs are a demanding clientele, focusing on exquisite science and speed. Our unique portfolio and client-focused business approach have made Charles River an indispensable research partner, tailor-made for this expanding client segment.The Discovery business had an excellent quarter as we continue to distinguish ourselves through the breadth of our portfolio and the synergies between our Discovery and Safety Assessment businesses. The third quarter performance was driven by broad-based growth across oncology, Early Discovery and CNS services. Our clients' programs often begin with the target identification capabilities of our Early Discovery business and encompass multiple DSA sites and services as the programs advance. We have successfully demonstrated to clients that working with us through a broader portion of the early-stage drug research process enhances the value we provide them, both from a scientific and cost-effectiveness perspective.Our efforts to strengthen our Discovery toolkit and expand our footprint continue to resonate with clients, both large and small. We continue to evaluate new opportunities to add innovative discovery capabilities to our portfolio as we believe creating a comprehensive solution at the earliest stage of drug research will enhance client retention as their programs progress through the pipeline. Our recent partnership with Distributed Bio is progressing nicely. Distributed Bio's large molecule discovery capabilities have generated considerable client interest and we believe this relationship and our broader partnership strategy will create additional opportunities to work with clients on their integrated programs.Client utilization of our expanded South San Francisco Discovery site also continues to increase. The site offers a wide range of capabilities from CNS to DMPK and bioanalytical services to the fast-growing West Coast biotech client base. And we expect to expand the services offered there. Whether by internal investment, partnership or acquisition, we intend to continue to build our discovery portfolio to reinforce our position as the premier single-source provider for a comprehensive range of Discovery Services.Revenue growth for Safety Assessment was consistent with both our full year and long-term expectations for the overall DSA segment. The business continued to perform well, driven by robust demand from biotech clients and increased pricing. Bookings and backlog improved year-over-year, supporting our Safety Assessment outlook for the remainder of the year and into 2020. As you know, Safety Assessment growth is not linear and will modestly fluctuate from quarter-to-quarter because the balance between price, volume, mix and the timing of study starts is not always uniform.The integration of CiTox remains on track, and its financial performance is in line with the acquisition plan. As anticipated, it is a complex integration across multiple sites in multiple countries, but the collaborative efforts and hard work of Citoxlab's talented staff and their Charles River colleagues have resulted in the successful first 6 months together. With Citoxlab to date, and MPI and WIL beforehand, we have done an excellent job on the integrations, achieving our goals of adding and retaining hundreds of new clients, enhancing the work experience for our employees, expanding our capabilities, both geographically and scientifically, and driving operational synergies and greater efficiencies.The DSA operating margin declined 50 basis points to 22.1% in the third quarter due entirely to an 80 basis point headwind from the Citoxlab acquisition. As we said at the time of the acquisition, Citoxlab has a lower operating margin than the legacy Safety Assessment business, but we believe it will reach the 20% level within approximately 2 years of the transaction, driven by acquisition synergies and continued growth. We have built a global DSA footprint with unparalleled breadth and depth by adding capabilities, capacity and staff through acquisitions and internal investments and as a result, have become the partner of choice for a broad range of clients.We have invested significantly in the last few years to achieve appropriate staffing levels so that we could accommodate growing client demand in the Safety Assessment business and believe we have achieved this goal. With the appropriate head count going forward, continued modest capacity additions and a focus on operational excellence, the DSA segment is well positioned to achieve a mid-20% operating margin over the next 2 years. RMS segment revenue was $132.5 million, an increase of 5.8% on an organic basis over the third quarter of last year. Our research model business in China delivered another excellent performance and Insourcing Solutions also continued to perform very well.As we mentioned at Investor Day, there are abundant opportunities to expand into new regions in China to support the substantial growth in its rapidly emerging biomedical research market. In addition to our current footprint in the major R&D hubs of Beijing and Shanghai, we have plans to open a new site in Central China in 2020. Expanding our presence supports our goals of market leadership and achieving a market share in China similar to that in Western markets. Because the research model markets outside of China are mature, volume growth continues to be limited.In Western markets, we expect a continuation of the research model trends that have been largely present for many years: declining demand from large biopharma, increasing demand from biotechs and consistent price increases. From a services perspective, Insourcing Solutions, or IS, continues to perform very well as clients increasingly adopt flexible models to enhance the operational efficiency of their vivarium management and research efforts. The NIAID contract contributed approximately 350 basis points to RMS revenue growth in the third quarter. We anniversaried this contract in mid-September, so the year-over-year contribution to revenue growth and the corresponding operating margin headwind will normalize beginning in the fourth quarter. As a result, we expect the RMS growth rate to moderate to a low single-digit rate in the fourth quarter. The IS business continues to be a flexible option for academic and government institutions, which have historically been IS's primary client base. Insourcing Solutions is also gaining traction with new biopharma clients, particularly through the success of our CRADL initiative. CRADL, or Charles River Accelerator and Development Labs, provides both small and large biopharmaceutical clients with turnkey research capacity in the Boston/Cambridge biohub, and beginning early next year in the South San Francisco biohub. Through both unique models like CRADL and more traditional in-source staffing arrangements, the IS business has become an important partner for clients who need this type of support for their research programs.In the third quarter, the RMS operating margin increased by 60 basis points to 26.5% due primarily to the research models business as well as our ongoing efficiency initiatives. The improvement was partially offset by the lower-margin NIAID contract, which reduced the RMS operating margin by approximately 50 basis points in the quarter. Our goal is to maintain the RMS operating margin above 25% through our continuing efforts to enhance operating efficiency.Revenue for the Manufacturing Support segment was $115.3 million, a 10.6% increase on an organic basis over the third quarter of last year. The increase was driven by strong demand across both Biologics Testing Solutions and the Microbial Solutions businesses.The Microbial Solutions had a good quarter with broad-based growth across all three of its major testing platforms: Endosafe endotoxin testing, Celsis bioburden and sterility testing and Accugenix microbial identification services. The primary driver of third quarter revenue growth was demand for our Endosafe rapid testing systems and cartridges. We sold significantly more Endosafe instruments over the prior year, which in turn, will drive greater demand for cartridges. Endosafe improves the efficiency of our clients' manufacturing and lot release testing processes. And because there's no competitive alternative to our rapid testing system, we are continuing to convert the marketplace to our more efficient and reliable testing platform.The continued expansion of the installed base of instruments drives demand for the consumable cartridges, which provides a healthy recurring revenue stream. In addition, investments in process improvements that we discussed last quarter are already beginning to result in improved operating leverage. We're very pleased to see that as expected, biologics revenue growth rebounded well above the 10% level in the third quarter. We are adding capacity globally to accommodate the robust growth in a number of biologics in the pipeline and on the market and the demand for our services.The largest global expansion is taking place in Pennsylvania. Our new site in Wayne, Pennsylvania, which we have been transitioning into for the past year, will provide the required scale in the U.S. to support growth through the next three to five years. The site has been registered with the FDA, and we are working with clients on their validation activities at the new site, which are expected to be substantially complete by the end of the year.In addition to building scale, we also continue to enhance our biologics testing capabilities to accommodate more of our clients' process development and quality control needs. Cell and gene therapies continue to be the fastest-growing area for our biologics business, and we are developing new assays to provide a more comprehensive portfolio of these services.The Manufacturing segment's third quarter operating margin was 36.4%, a 300 basis point improvement year-over-year. The increase was due primarily to enhanced operating efficiency in the Microbial Solutions business and operating leverage from robust revenue growth in Biologics Testing Solutions business. We were very pleased that the Manufacturing segment's operating margin rebounded to the mid-30% level in the third quarter, which is consistent with our 2-year target for this business.At our recent Investor Day, we highlighted the manner in which we have executed our strategy and continue to do so: to become the early-stage CRO partner of choice for our clients' drug research, development and manufacturing support efforts; to build our extensive scientific expertise, which we believe is unique and unparalleled in the early-stage CRO universe; and to invest in our people, technology and infrastructure to create a more efficient and responsive organization that provides flexible customized solutions to our clients. As we look to the future, it's imperative that we continue to expand our portfolio of essential products and services to enhance our ability to comprehensively support our clients' drug research efforts. We intend to do so through strategic acquisitions, which is always our preferred use of capital.Our pipeline of M&A candidates remains robust, and we continue to evaluate a number of opportunities ranging from unique research tools to discovery capabilities to manufacturing support activities. We also must stay current with new technologies and modalities, such as cell and gene therapies. To do so, we are increasingly utilizing a partnership strategy, such as our relationship with Distributed Bio, to add innovative capabilities and cutting-edge technologies with limited upfront risk.Our partnering activities extend beyond the Discovery business as we have signed several of these relationships to date, encompassing most of our businesses and intend to sign more. These partnerships allow us to assess breakthrough technologies, typically with a small upfront investment and have the potential to result in longer-term collaboration agreements or can be a precursor to acquiring the company. We look to add at least $1 billion in annual revenue through acquisitions and partnerships over the next 5 years. And the transactions with which we choose to move forward will not only fit our strategic rationale, but also meet our disciplined investment criteria in order to generate greater shareholder returns.We have spent the past several years investing internally in capacity and staffing to levels that are commensurate with growing demand, while striving to enhance the scalability of the business. While we will need to continue to invest, we believe that we have achieved an appropriate balance. We now have an enhanced ability to leverage top line growth and drive greater efficiency, which will enable us to achieve the 2-year financial targets that we provided at Investor Day, including an aggressive but realistic 20% operating margin in 2021.As we also mentioned at Investor Day, as we work towards our business and financial goals, we are maintaining an intense focus on sustainability. We are committed to environmental, social and corporate governance initiatives and believe that this commitment will enable us to minimize our impact on the environment as we: implement sustainable practices; enhance our corporate citizenship by focusing on improving the quality of people's lives including patients, clients, employees and our communities; and operate our business with integrity and accountability as we have always done.We were pleased to welcome Gina Wilson to our Board last month. Gina's diverse experience across multiple industries will enhance the financial acumen of Charles River's Board and its ability to oversee our broader strategy and focus on driving profitable growth. Gina brings highly valuable knowledge and experience in managing the finance organizations of growing businesses, strategically allocating capital and driving operating efficiency, which will complement the combined skills and experience of our current directors. We will continue to evaluate adding new members to our Board to further enhance the diversity of skills, experience and perspectives.We are pleased with the performance of the collective portfolio in the third quarter. And over the longer term, we expect to deliver high single-digit organic revenue growth, earnings per share growth at least in the low double digits and strong free cash flow.In conclusion, I'd like to thank our clients and shareholders for their support and our employees for their exceptional work and commitment. I'll ask David to give you additional details on our third quarter results and updated 2019 guidance.