This Annual Report on Form 10-K contains forward-looking statements regarding future events and the future results of Charles River Laboratories International, Inc. that are based on our current expectations, estimates, forecasts and projections about the industries in which we operate and the beliefs and assumptions of our management. Words such as “expect,” “anticipate,” “target,” “goal,” “project,” “intend,” “plan,” “believe,” “seek,” “estimate,” “will,” “likely,” “may,” “designed,” “would,” “future,” “can,” “could” and other similar expressions, which are predictions of, indicate future events and trends or which do not relate to historical matters are intended to identify such forward-looking statements. These statements are based on our current expectations and beliefs and involve a number of risks, uncertainties and assumptions that are difficult to predict. For example, we may use forward-looking statements when addressing topics such as: our expectations regarding the availability of non-human primates and our ability to diversify our non-human primate supply chain; the outcome of the U.S. Department of Justice investigations related to shipments of non-human primates from Cambodia received by the Company; the timing of the development and implementation of additional procedures to reasonably ensure that non-human primates imported to the United States from Cambodia are purpose-bred; the COVID-19 pandemic, its duration, its impact on our business, results of operations, financial condition, liquidity, use of our borrowings, business practices, operations, demand, suppliers, inventory and supplies, third party service providers, customers, employees, industry, ability to meet future performance obligations, ability to timely account for assets on our balance sheet, ability to efficiently implement advisable safety precautions, and internal controls over financial reporting; the COVID-19 pandemic’s impact on demand,changes and uncertainties in the global economy and financial markets, including any changes in business, political, or economic conditions due to the November 16, 2022 announcement by the U.S. Department of Justice through the U.S. Attorney’s Office for the Southern District of Florida that a Cambodian non-human primate supplier and uncertaintiestwo Cambodian officials had been criminally charged in connection with illegally importing non-human primates into the global economy;United States; client demand, particularly future demand for drug discovery and development products and services, including the outsourcing of these services; our expectations with respect to our ability to meet financial targets; our expectations regarding stock repurchases, including the number of shares to be repurchased, expected timing and duration, the amount of capital that may be expended and the treatment of repurchased shares; our ability to successfully execute our business strategy; our ability to timely build infrastructure to satisfy capacity needs and support business growth, our ability to fund our operations for the foreseeable future, the impact of unauthorized access into our information systems, including the timing and effectiveness of any enhanced security and monitoring present spending trends and other cost reduction activities by our clients; future actions by our management; the outcome of contingencies; changes in our business strategy, business practices and methods of generating revenue; the development and performance of our services and products; market and industry conditions, including competitive and pricing trends; our strategic relationships with leading pharmaceutical and biotechnology companies, venture capital investments, and opportunities for future similar arrangements; our cost structure; the impact of acquisitions and divestitures; our expectations with respect to revenue growth and operating synergies (including the impact of specific actions intended to cause related improvements)improvements, particularly with respect to our CDMO business); the impact of specific actions intended to improve overall operating efficiencies and profitability (and our ability to accommodate future demand with our infrastructure), including gains and losses attributable to businesses we plan to close, consolidate, divest or repurpose; changes in our expectations regarding future stock option, restricted stock, performance share units and other equity grants to employees and directors; expectations with respect to foreign currency exchange; assessing (or changing our assessment of) our tax positions for financial statement purposes; and our liquidity. In addition, these statements include the impact of economic and market conditions on us and our clients, the effects of our cost-saving actions and the steps to optimize returns to shareholders on an effective and timely basis; and our ability to withstand the current market conditions.

Forward-looking statements are predictions and are subject to risks, uncertainties and assumptions that are difficult to predict. Therefore, actual results may differ materially and adversely from those expressed in any forward-looking statements. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this document or, in the case of statements incorporated by reference, on the date of the document incorporated by reference. Factors that might cause or contribute to such differences include, but are not limited to, those discussed in this Form 10-K under the sections entitled “Our Strategy,” “Risk Factors,” “Management's Discussion and Analysis of Financial Condition and Results of Operations,” in our press releases and other financial filings with the SEC. We have no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or risks. New information, future events or risks may cause the forward-looking events we discuss in this report not to occur.

We began operating in 1947 and, since then, have undergone several changes to our business structure. Charles River Laboratories International, Inc. was incorporated in 1994 and we completed our initial public offering in 2000. Our stock is traded on the New York Stock Exchange under the symbol “CRL” and is included in the Standard & Poor’s 500 and Composite

1500 indices, the Dow Jones U.S. Health Care Index, the New York Stock Exchange (NYSE) Arca Biotechnology Index, the NYSE Composite and many of the Russell indices, among others. We are headquartered in Wilmington, Massachusetts. Our headquarters mailing address is 251 Ballardvale Street, Wilmington, MA, 01887, and the telephone number at that location is (781) 222-6000. Our Internet site is www.criver.com. Material contained on our Internet site is not incorporated by reference into this Form 10-K. Unless the context otherwise requires, references in this Form 10-K to “Charles River,” “we,” “us,” “the Company” or “our” refer to Charles River Laboratories International, Inc. and its subsidiaries.

We are a full service, leading, non-clinical contract research organization (CRO).global drug development partner with a mission to create healthier lives. We have built upon our original core competency of laboratory animal medicine and science (research model technologies) to develop a diverse portfolio of discovery and safety assessment services, both Good Laboratory Practice (GLP) and non-GLP, which is able to supportthat supports our clients from target identification through non-clinical development. We also provide a suite of products and services to support our clients’ manufacturing activities, including our newly acquired contract development and manufacturing organization (CDMO) business. Utilizing our broad portfolio of products and services enables our clients to create a more efficient and flexible drug development model, which reduces their costs, enhances their productivity and effectiveness, and increases speed to market.

The development of new drugs requires a steadily increasing investment of time and money. Various studies and reports estimate that it takes between 10 to 15 years, up to $2.5 billion excluding time costs and exploration of between 10,000 and 15,000 drug molecules to produce a single Food and Drug Administration (FDA)-approved drug.

Discovery represents the earliest stages of research in the life sciences, directed at the identification, screening, and selection of a lead molecule for future drug development. Discovery activities typically extend anywhere from 4 to 6 years in conventional pharmaceutical research and development (R&D) timelines.

We currently operate in over 110150 locations and in over 2021 countries worldwide (excluding ourcertain Insourcing Solutions sites). Our products and services, supported by our global infrastructure and deep scientific expertise, enable our clients to overcome many of the challenges of non-clinical life sciences research. In 2021,2022, our total revenue was $3.5 billion and our income before income taxes, was $480.7 million.$4.0 billion.

We have three reporting segments: Research Models and Services (RMS), Discovery and Safety Assessment (DSA) and Manufacturing Solutions (Manufacturing).

Through our RMS segment, we have suppliedprovided foundational tools for the discovery of new molecules by supplying research models to the drug development industry since 1947. With over 160150 different stocks and strains, we continue to maintain our position as a global leader in the production and sale of the most widely used rodent research model strains and purpose-bred rats and mice. We also provide a variety of related services that are designed to support our clients in the use of research models in drug discovery and development. We maintain multiple production centers, including barrier rooms and isolator facilities, on three continents (North America, Europe, and Asia). In 2021,2022, RMS accounted for 19.5%18.6% of our total revenue and approximately 3,900

Our DSA business segment provides services that enable our clients to outsource their innovative drug discovery research, their related preclinical drug development activities, and their regulatory-required safety testing of potential new drugs, vaccines, industrial and agricultural chemicals, consumer products, veterinary medicines and medical devices. The demand for these services is driven by the needs of large global pharmaceutical companies that continue to transition to an outsourced drug development model, as well as by the needs ofin addition to mid-size and emerging biotechnology companies, industrial and agrochemical companies and non-governmental organizations that rely on outsourcing. These entities may choose to outsource their discovery, development and safety activities to reduce fixed costs and to gain access to additional scientific expertise and capabilities. In fiscal 2021, we

We are the largest provider of outsourced drug discovery, non-clinical development and regulated safety testing services worldwide. We have extensive expertise in the discovery of clinicalpreclinical candidates and in the design, execution and reporting of safety assessment studies for numerous types of compounds including cell and gene therapies, small and large molecule pharmaceuticals, industrial and agricultural chemicals, vaccines, consumer products, veterinary medicines, cell and gene therapies, biocides and medical devices. We currently provide discovery and safety assessment services at multiple facilities located in the United States (U.S.), Canada, and Europe. In 2021,2022, our DSA segment represented 59.5%61.6% of our total revenue and employed approximately 12,40013,200 of our employees including approximately 1,6001,800 science professionals with advanced degrees.

We provide our research models to numerous clients around the world, including most pharmaceutical companies, a broad range of biotechnology companies, other contract research organizations and many government agencies, hospitals, and academic institutions. We have a global footprint with production facilities strategically located in 78 countries, in close proximity to our clients.major biohubs and client concentrations. Our research models include commonly used laboratory strains, disease models and specialized strains with compromised immune systems, which are in demand as early-stage tools in the drug discovery and development process.

The research models we supply have been, and continue to be, some of the most extensively used in the world, largely as a result of our geographic footprint and continuous commitment to innovation, quality, and quality.biosecurity. Our research models are bred and maintained in controlled environments, which are designed to ensure that the models are free of specific viral and bacterial agents and other contaminants that can disrupt research operations and distort scientific results. With our production capabilities, we are able to deliver consistently high-quality research models worldwide.

Our research models include:

Certain of our research models are proprietary rodent models used to research treatments in several therapeutic areas. We are also a premier provider of high quality, purpose bred, SPF large research models to the biomedical research community.

Additionally, we offer ion channel and drug transporter testing for both discovery and non-clinical purposes, as well as genome editing services.

Our safety assessment facilities comply with animal welfare requirements and GLP to the extent required by the FDA, Environmental Protection Agency, USDA,United States Department of Agriculture (USDA), European Medicines Agency, European Chemicals Agency and the Organization for Economic Co-operation and Development (OECD), as well as other international regulatory agencies. Furthermore, our early-stage discovery work, which is not subject to GLP standards,regulations, is typically carried out under a quality management system. Our safety assessment facilities, along with our Biologics Solutions and Microbial Solutions facilities, are regularly inspected by U.S. and other regulatory compliance monitoring authorities, our clients’ quality assurance departments and our own internal quality assessment program.

Our Manufacturing Solutions segment is comprised of three businesses: Microbial Solutions, Biologics Solutions, and Avian Vaccine Services.Services, which was divested in December 2022.

One of the primary growth drivers in our Microbial Solutions business is our FDA-approved line of next-generation endotoxin testing products. This line is based on the Endosafe Portable Testing System (Endosafe® -PTS™) technology, which allows rapid endotoxin testing in the central laboratory or manufacturing environment. In recent years, we expanded the PTS product portfolio to include a multiple sample testing system known as the Endosafe®-MCS™ (multi-cartridge system) and the first fully automated robotic system developed specifically for high-volume endotoxin testing, Endosafe®-Nexus, to satisfy the demand of our clients who require higher sample throughput. We have seen expanded use of this rapid endotoxin testing technology as clients transition from traditional methods to our rapid cartridge technology and are seeking to meet data integrity requirements with our automated systems and software solutions.

Our current Good Manufacturing Practices (cGMP) manufacturing services facilities grow and store well-characterized early-stage client cell lines and virus seed stocks for later development or manufacture of therapeutic proteins and vaccines for clinical trials. We further design and provide viral clearance programs according to cGMP at our German facility and GLP at our U.S. facility for Phase I, II and III human clinical studies as well as for market authorization.

Our objective is to be the preferred strategic globalnon-clinical drug development partner for our clients. Our strategy is to deliver a comprehensive and integrated portfolio of drug discovery and non-clinical development products, services and solutions to support our clients’ discovery and early-stage drug research, process development, scale up, manufacturing and manufacturingproduct release efforts, and enable them to bring new and improved therapies to market faster and more cost effectively. Separately, through our various Manufacturing segment businesses, we aim to be the premier provider of products and services that ensure our clients produce and release their products safely.

We believe we have certain competitive advantages in executing this strategy because of our continuing focus on the following:

We believe that this changing environment will provide enhanced outsourcing opportunities for us in the future. We remain optimistic that our clients are increasingly receptive to partnering with CROsus as a means of meeting their discovery and non-clinical support needs. We believe that the successful development of new therapies and outsourcing by the pharmaceutical industry will continue to be positive drivers of demand for our products and services.

Global biopharmaceutical companies are continuing to make the decision to outsource more significant tranches of their drug discovery, development and manufacturing processes. The success of our business model is underscored by the fact that we have entered into strategic commercial relationships with leading global biopharmaceutical companies and expanded existing preferred provider agreements with other leading global biopharmaceutical companies. We also continue to broaden and extend our relationships with other research institutions across the portfolio.

We believe that larger biopharmaceutical companies will increasingly focus on efficiencies and execution. They will continue to reassess their core differentiators from R&D to commercialization, and which aspects of their drug discovery, development and manufacturing processes they will choose to outsource. We expect they will also continue to be conservative in re-building infrastructure and expertise. This should lead to more opportunities for strategic outsourcing as larger pharmaceutical clients choose to utilize external resources rather than invest in internal infrastructure. By partnering with a CRO like Charles River, theywe believe our clients can take advantage of efficiencies in their early-stage research activities that can result in months or years saved in getting a drug to market. In the aggregate, we believe that the evolving large biopharmaceutical R&D business model along with our focus on data and digitalization will make our essential products and services even more relevant to our clients, and allow them to leverage our integrated offerings and expertise to drive their research, non-clinical development and manufacturing efficiency and cost effectiveness.

The evolving biopharmaceutical R&D business model, coupled with a robustsustained and healthy funding environment, have also led to the emergence of a significant number of new biotechnology companies in recent years that are discoveringdeveloping innovative new therapies. The biopharmaceutical industry also continues to evolve and become more sophisticated, with research yielding new types of treatments with increasing complexity, and more targeted and individualized therapies. We believe that our portfolio provides flexible solutions and scientific expertise that meet the customized needs for virtual and small biotechnology companies, which have limited or no infrastructure. These clients also value our ability to provide a broad range of services where we work hand in hand with our clients to design, plan and manage integrated projects and programs. This includes classically outsourced services, “insourced” services and hybrid offerings blending resources from both our clients and our staff.

Our strategic imperatives are centered around our intense focus on initiatives designed to allow us to drive profitable growth, enhance our operating efficiency and better position ourselves to operatefunction successfully in the current and future business environment, which we believe will collectively enable us to maximize value for our shareholders.

In recent years, we have expanded our Biologics Solutions servicesservice capabilities into the established high-growth, markethigh-science sector of cell and gene therapy. Our goal is to deliver the fastest and highest quality end-to-end integrated solution to accelerate cell and gene therapy development and manufacturing globally by leveraging our comprehensive portfolio of cell and gene therapy capabilities with a consistent, easy-to-use, and customizable, high-science approach, while offering the flexibility to adapt and innovate to meet our client’s changing needs. In the cell and gene therapy market,sector, we aim to accelerate our clients’ path to market, to expand capabilities and geographic reach to complement our leading non-clinical portfolio, and to collaborate with our clients and partners to enable and commercialize the next generation of cell and gene therapy innovations. The acquisitions of Cognate and Vigene,Our CDMO capabilities, combined with our comprehensive portfolio, most notably our Biologics Testing Solutions business, industry experience, and established infrastructure, helped solidify the Company as a premier scientific partner for cell and gene therapy development, testing, and manufacturing.

We intend to continue to broaden the scope of the products and services that we provide across the drug discovery and non-clinical development continuum primarily through internal development, and, as needed, through focused acquisitions and alliances. Acquisitions, such as our acquisitions of Citoxlab in fiscal 2019, HemaCare and Cellero in fiscal 2020, and Distributed Bio, Retrogenix, Cognate, and Vigene in fiscal 2021, and Explora BioLabs in fiscal 2022, are an integral part of our growth strategy, both to expand our portfolio and broaden our geographic footprint. We are committed to a disciplined approach that seeks to target businesses that are a sound strategic fit and that offer the prospect of enhancingfit. We aim to consistently deliver shareholder value, typically including the achievement of a hurdle rate for return on invested capital above our weighted average cost of capital.

In addition to conventional mergersMergers and acquisitions remain one of our top, long-term priorities for disciplined capital deployment and enhancing growth strategy with focus on enhancing the breadth of our scientific capabilities, expanding our global scale, and maintaining our leadership position in advanced and emerging therapies. Our long-term strategy also includes growth through establishing relationships and exploring other opportunities and areas that have the potential to strengthen our broad-based portfolio of products and services. In particular, our focus has been to drive differentiation through technologies that enhance the speed to develop a clinical candidate and allow biopharmaceutical companies to make earlier go/no-go decisions. Among other arrangements, these relationships may include entering into license agreements, strategic technology partnerships or joint

ventures that will allow us to access innovative capabilities and cutting-edge or nascent technologies with a modest investment component. Our ability to thoroughly assess these technologies and market opportunities may later result in an acquisition.

We also partner with a diverse set of leading venture capital firms around the world primarily investing in life sciences, health care and therapeutics with an emphasis on early-stage companies. Through these partnerships and close relationships, we gain insight into their company and asset portfolios and are thus able to promote our contract research services for discovery, safety assessmenteach of our businesses. We also view these partnerships as an investment in new and biologics testing.emerging sciences and technologies as they allow us to gain insights to cutting-edge capabilities. Thus, we have the opportunity to establish ourselves as a provider of choice for a unique client group that has emerged as biopharmaceutical companies rationalize and prioritize their development pipelines.

Our clients consist primarily of major biopharmaceutical companies; many biotechnology, agricultural and industrial chemical, life science, veterinary medicine, medical device, diagnostic and consumer product companies; contract research and contract manufacturing organizations; and other commercial entities, as well as leading hospitals, academic institutions and government agencies. We have stable, long-term relationships with many of our clients. During 2021,2022, no single commercial client accounted for more than 4%3% of our total revenue and no single client accounted for more than 8% of the revenue of any of our three business segments.

We continue to pursue a goal of expanding our relationships with our large biopharmaceutical clients, and with many of our larger mid-market clients. These relationships take different forms, from preferred provider arrangements to strategic partnerships. The structure of these relationships incentivizes clients to purchase more products and services across our non-

Our marketing efforts are focused on stimulating demand for further outsourcing across our entire services portfolio. We believe that our ability to provide solutions that address all aspects of early-stage drug research are increasingly attractive to our clients, and we continue to design and market our commercial activities to deliver flexible, customized programs designed by segment to meet our clients’ global and site-specific needs.

Our go-to-market approach employs a number of sales and marketing strategies, including dedicated sales teams for each of our major lines of business. We also maintain several sales specialists that either have specific technical expertise (often degreed scientists) or cover unique markets.

In addition to our field sales teams and related specialists, we also have a team of alliance managers who are organized by key client within our market segments (global biopharmaceutical, small and mid-sized pharmaceutical and biotechnology companies, and academic and government institutions). This enhances our ability to meet client needs by offering customized, tailored solutions across our entire portfolio. In addition, our clients benefit by additional support from a combination of technical specialists with specific scientific and therapeutic area expertise. We also apply the use of dedicated sales specialists for certain technical product lines, such as in our Manufacturing businesses.

We sell our products and services principally through our direct sales and business development teams who work in North America, Europe and Asia. In addition to interactions with our direct sales force, our primary promotional activities include organizing scientific symposia, publishing scientific papers and newsletters, hosting webinars and seminars and making presentations at, and participating in, scientific conferences and trade shows in North America, Europe and Asia. We supplement these scientifically based marketing activities with digital marketing, advertising and direct mail. In certain areas, our direct sales force is supplemented by international distributors and agents.

Our internal strategic marketing and marketing operations teams support the field sales and business development teams while developing and implementing programs to build awareness about products and services and create opportunities for interaction with our clients in the biomedical research industry. We maintain client engagement, lead development support, digital experience, and event management departments, which address both our clients’ routine and more specialized needs and purposely serve as a scientific support and information resource for them. We frequently assist our clients in solving problems

related to resourcing products and services, research support, non-clinical study design, regulatory consulting, protocol development and other areas in which our expertise is widely recognized as a valuable resource by our clients.

Our goal is to be a leader in each of the markets in which we participate. We compete in the marketplace on the basis of our therapeutic and scientific expertise in early-stage drug research, quality, reputation, flexibility, responsiveness, pricing, innovation and global capabilities. We are able to offer a unique portfolio of early-stage products and services to support drug discovery and development.

We encounter a broad range of competitors of different sizes and capabilities in each of our three businesses segments. We also face competition from the internal discovery and development resources of our clients.

One of our core values is a concern for, and commitment to, animal welfare. Research animals are an important resource that further our knowledge of living systems and contribute to the discovery of life-saving drugs and procedures. We work hand-in-hand with the scientific community to understand how living conditions, handling procedures and stress play a role in the quality and efficiency of research. As researchers, we are responsible to our clients and the public for the health and well-being of the animals in our care.

We have been in the forefront of animal welfare improvements in our industry, and continue to show our commitment with special recognition programs for employees who demonstrate an extraordinary commitment in this critical aspect of our business. We created our own Humane Care Imperative (HCI), which is overseen by our Global Animal Welfare and Training corporate group. The goal of HCI is to ensure that we continue as a worldwide leader in the humane care of research animals and implementation of the 3Rs (Replacement, Reduction and Refinement).

We provide for scholarships for training in laboratory animal science, provide financial support to non-profit organizations that educate the public about the benefits of animal research and provide awards and prizes to outstanding leaders in the laboratory animal science field and the supporters of 3Rs.

As of December 25, 2021,31, 2022, we had approximately 20,00021,400 employees (including approximately 2,0002,600 science professionals with advanced degrees, including Ph.D.s, D.V.M.s and M.D.s). Approximately 18,60020,000 of our employees are considered full-time employees, while approximately 1,400 are considered part-time employees. Our workforce was distributed geographically approximately as follows: 63% in North America, 32%31% in Europe, and 5%6% in Asia, and less than 1% in any other region.

Our employees are not unionized in the U.S. Employees at some of our European facilities are represented by works councils, employee representative groups and/or unions, which is consistent with local customs for our industry. We collaborate with the works councils and believe we have good relationships with our employees.

At Charles River, our values of Care, Lead, Own, and Collaborate guide our decisions and actions; they are standards we hold ourselves to each and every day and are critical to success in fulfilling our goals. In addition, our CRL DNA are the behaviors based on these values that we use to make decisions, grow our future leaders, and pave the way for years ahead.

Sustaining our corporatecompany culture is a vital part of our strategy. Our corporate culture is built on trust, inclusion, accountability, respect, and well-being. Our objective is to enable colleagues to connect with their work in a way that supports each other, our clients, and our communities. We strive to maintain an environment wherein every person has the ability to deliver on business commitments, while having purpose, being energized, continuously learning, and delivering quality outcomes that make a difference. In the past year, we have developed a unique employer brand that is infused in other aspects of our employee experience. We pride ourselves on supporting our people both professionally and personally throughout their employee experience with us.

In order to attract, onboard, support, attract and retain such great talent, we provide our employees with opportunities for skill building and career advancement. OurBeginning with our onboarding program, our talent management approach is structured to be highly collaborative, encourages ownership, and provides the opportunity to contribute and develop through regular performance conversations, annual goal setting, and ongoing feedback. Furthermore, we have created a global learning strategy that includes technical training, mentoring and coaching approaches, tuition reimbursement, rotational programs,sabbaticals, leadership development programs, and on-the-job training. In fiscal 2021,2022, we hired over 5,3005,700 people and our voluntary turnover for all employees was approximately 13%15%, a portion of which percentage we attribute to the national trend of increased attrition in the workplace. Additionally, we conduct regular talent reviews to identify and develop diverse leadership and key talent pipelines to delivery on short-term and long-term business strategy.

In addition to growth opportunities, we strive to attract, motivate, and retain top talent by providing competitive compensation programs while rewarding outcomes and behaviors that align with our performance, culture, and values. While we perform pay equity audits in countries where they are legally required, we also performedperform a larger pay equity analysis on a global scale and tooktake corrective action where appropriate as part of our continuing efforts to be competitive in the marketplace. Furthermore, our global job architecture generally allows for aligning pay by job role with market rates and serves as a career path tool to encourage a culture of advancement.

We also promote a healthy and safe workplace for our employees. We maintain a Global Policy on Safety & Sustainability and, as part of our efforts to promote our goals of working safely and sustainably, in early 2020 we implemented a management systems approach to improve our safety performance, which involves both employee and management engagement in and ownership of our site-level environment, health, safety, and sustainability programs globally. At every Charles River site globally, we have health and safety leaders that promote employee health and safety and keep site management engaged in their health and safety programs.

We are also committed to cultivating a welcoming and inclusive environment where every employee can succeed and thrive. Operating in over 110150 locations and in over 2021 countries worldwide (excluding our Insourcing Solutions sites), we believe in treating our employees and prospective talent with dignity, decency, and respect. We recognize that employee diversity contributes to a more innovative workforce and see diversity and inclusivity as a strength for our business. Our commitment to equity spans across our employment-related decisions, from hiring and promotions, to transfers and compensation and career development programs. Our aim is to continue to build a talented workforce reflective of the global communities in which we live and work, and it is critical that our people feel like valued members of our Company. We believe that we have taken positive steps to promote a sense of belonging for our employees in the workplace by building a Diversity, Equity & Inclusion team and Chief Executive Officer-chaired Diversity, Equity and Inclusion council; expanding diverse representation at our Board level; launching employee resource groups; facilitating training on mitigating unconscious bias and creating inclusion for our people leaders and talent acquisition teams; and rolling out a Diverse Interview Panel initiative. This year, we have also set goals to increase engagement in diversity, equity and inclusion; increase participation in our employee resource groups; and maintain strong engagement and belonging scores on our employee engagement surveys. In addition to our internally focused efforts, we also actively engage with our clients and suppliers to share best practices. As of December 25, 2021,31, 2022, women made up

approximately 60% of our global workforce, 59% of our U.S. workforce and 36%38% of our global leadership positions, defined as positions carrying the title of Vice President or higher. From our U.S. workforce, 29%31% identified as racial and ethnic minorities.

Our backlog for our RMS, DSA and Manufacturing reportable segments was approximately $282 million, $3.1 billion and $116 million, respectively, as of December 31, 2022, as compared to $266 million, $2.4 billion and $136 million, respectively, as of December 25, 2021, as compared to $168 million, $1.4 billion and $79 million, respectively, as of December 26, 2020.2021. Related services are performed over varying durations, from short to extended periods of time, which may be as long as several years. We maintain an order backlog to track anticipated revenue from studies and projects that either have not started, but are anticipated to begin in the near future, or are in process and have not been completed. We only recognize a study or project in backlog after we have received written evidence of a client’s intention to proceed. Canceled studies or projects are removed from backlog.

As our business operates in many distinct regional environments and in a variety of locations worldwide, we are subject to numerous, and sometimes overlapping, regulatory environments.requirements.

The Animal Welfare Act (AWA) governs the care and use of certain species of animals used for research in the U.S. other than laboratory rats, mice and chickens bred for use in research. As a result, most of our U.S. small animal research models activities and our avian vaccine servicesmodel operations are not subject to regulation under the AWA. For regulated species, the AWA and the associated Animal Care regulations require producers and users ofthose working with regulated species to provide veterinary care and to utilizefollow specific husbandry practices such as cage size, shipping conditions, sanitation and environmental enrichment to ensure the welfare of these animals. Separately, facilities using live vertebrate animals in research funded by the U.S. Public Health Service (PHS) must also adhere to the PHS Policy on Humane Care and Use of Laboratory Animals and follow the Guide for the Care and Use of Laboratory Animals producedpublished by the Institute for Laboratory Animal Research.

We conduct non-clinical safety assessment studies to support the submissions for approval or licensing of our clients’ products throughout the world. Many of these studies must comply with national statutory or regulatory requirements for GLP. GLP regulations describe a quality system for the scientific, operational and quality process and the conditions under which non-clinical studies are planned, performed, monitored, recorded, reported and archived. GLP compliance is required by such regulatory agencies as the FDA, European Medicines Agency, Medicines and Healthcare Products Regulatory Agency in the United Kingdom (U.K.), Health Products Regulatory Authority in Ireland, Health Canada and other similar monitoring authorities in the countries where we operate. GLP requirements are significantly harmonized throughout the world and our laboratories are capable of conducting studies in compliance with all necessaryapplicable requirements.

Regulatory monitoring authorities such as the FDA, Medicines and Healthcare Products Regulatory Agency and OECD countries have indicated an increased emphasis on the management of electronic records and signatures generated by computerized systems to ensure data integrity under newly issued guidance.integrity. We have established a formal programcorporate data integrity governance to manage regulatory

and client expectations regarding data integrity within our regulated businesses. Although each business has a different impact on patient safety, all are expected to generate and preserve data with integrity. We recognize the importance of generating quality, reliable, sustainable data and have instituted several processes and established a global governance team with oversight responsibilities for our Data Integrity Compliance Plans to ensure we are consistent in our approach. To ensure that we have proper regulatory oversight over our electronic records, a dedicated quality function reviews our computerized system practices to ensure that appropriate record controls are in place and that a robust audit strategy confirms requirements are met for compliance.

At a global level, retention of data and controls for electronic systems, proprietary data and quality standards are covered by global policies. We also have controls in place such as quality manuals, policies and procedures, work instructions, document control processes, training, quality assurance and quality control processes and personnel, validated computerized systems and archiving requirements. Within businesses, procedures govern performance of activities to ensure data integrity throughout its life cycle.

Our Manufacturing businesses produce FDA licensed endotoxin test kits, sterility and microbial limits rest kits, reagents, cell banks used in research and biopharmaceutical production, clinical trial vaccines and vaccine support products. Additionally, several of our laboratories conduct biosafety and analytical testing such as identity, stability, sterility and potency and viral clearance testing in support of our clients’ manufacturing programs and to fulfill their validation requirements, as applicable. Furthermore, our

Our comprehensive cell and gene therapy manufacturing services include GMPGood Manufacturing Practices (GMP) production of cells from pre-clinical to commercial applications from a variety of starting materials. TheseMany of these activities are subject to regulation and consequently require these businesses to be inspected by the FDA and other national and applicable state regulatory agencies under their respective cGMP regulations. These regulations require that we manufacture our

All of our GMP sites are subject to registration, licensing and regulation, as appropriate under international treaties and conventions, including national, regional and local laws relating to:

Global regulatory compliance programs are managed by a dedicated group responsible for regulatory affairs and compliance. Our compliance programs are also managed by global quality systems, such as vendor supplier programs, enterprise quality management systems and global computer system validation. Within each regulated business, we have established Quality Assurance Units (QAUs) responsible for risk based internal audit programs to manage regulatory requirements and client expectations. The QAUs operate independently from those individuals that direct and conduct studies, manufacturing or analytical testing. Our Data Integrity Compliance Program ensures that senior management hasand the QAU’s have proper oversight with QAUs of our electronic records, inclusive of quality function reviews of our computerized system practices to ensure that appropriate record controls are in place and that a robust audit strategy confirms requirements for compliance.

While we expect that capital expenditures will be necessary to ensure that our existing sites remain in compliance with governmentall applicable regulations, at this point we do not expect these expenditures to materially differ than our historical experience.

We develop and implement computer software and scientifically-driven products and procedures to maximize the quality and effectiveness of our offerings. Intellectual property rights, in the form of know-how, trade secrets, patents, trademarks, copyrights, and others are important to us and are valuable to our ability to provide significant benefits to our clients. Steps are taken to protect our intellectual property rights and include the execution of confidentiality agreements and securing registrations in relevant jurisdictions. In addition, we in-licenselicense technology from other companies when it enhances our product and services businesses. In-licensingLicensing has recently become a larger company-wide initiative, particularly as we increase our focus on innovative technologies that further diversify and enhance our portfolio.

We are committed to operating our business with integrity and accountability. We strive to meet or exceed all of the corporate governance standards established by the NYSE, the SEC and the U.S. Federal government as implemented by the Sarbanes-Oxley Act of 2002, the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 and other applicable laws, rules and regulations. Nine of the eleven members of our Board of Directors are independent and have no significant financial, business or personal ties to us or management. Our Audit Committee, Compensation Committee, and Corporate Governance and Nominating Committee of our Board of Directors are each composed entirely of independent directors. The Board adheres to our Corporate Governance Guidelines and a Code of Business Conduct and Ethics that has been communicated to employees and posted on our website. We are diligent in complying with established accounting principles and are committed to providing financial information that is transparent, timely and accurate. We have a Related Person Transactions Policy designed to promote the timely identification of such transactions and to ensure we give appropriate consideration to any real or perceived conflicts in our commercial arrangements. We have an established global process through which employees, either directly or anonymously, can notify management (and the Audit Committee of the Board of Directors) of alleged accounting and auditing concerns or violations including fraud. Our internal Disclosure Committee meets regularly and operates pursuant to formal disclosure procedures and guidelines to help ensure that our public disclosures, including our periodic reports filed with the SEC, earnings releases and other written information that we disclose to the investment community are complete, accurate and timely. We continually monitor developments in the law and stock exchange regulations, as well as overall corporate governance trends and intend to adopt new procedures consistent with such developments to the extent applicable to and appropriate for our Company. Copies of our Corporate Governance Guidelines, Code of Business Conduct and Ethics and Related Person Transactions Policy are available on our website at http://ir.criver.com under the “Investor Relations - Corporate Governance” caption.

Below are the names, ages and principal occupations of each of our current executive officers. All such persons have been elected to serve until their successors are elected and qualified or until their earlier resignation or removal.

promoted to the newly created position of Corporate Senior Vice President & Controller, Global Operations, where she worked collaboratively with Charles River’s business units to develop and implement business strategies. In 2020, Ms. Parisotto was promoted to Corporate Senior Vice President, Global Safety Assessment, where she was responsible for leading the Company’s global Safety Assessment organization, and positioning the business for continued, long-term growth and success. In October 2022, Ms. Parisotto was promoted to Corporate Executive Vice President, and assumed the additional oversight of the Discovery Services business to lead its strategic vision and operational growth, as well as enhance the synergies between the businesses and with clients across the global Discovery and Safety Assessment segment. Ms. Parisotto holds a B.S. in October 2014. At Galapagos, he servedAccounting from the University of Nevada, Reno, an M.B.A. from the University of Phoenix, and is a Certified Public Accountant.

Set forth below, elsewhere in this Form 10-K, and in other documents we file with the SEC are risks and uncertainties that could cause actual results to differ materially from the results contemplated by the forward-looking statements contained in this Form 10-K. We note that factors set forth below, individually or in the aggregate, as well as additional risks and uncertainties either not presently known or that are currently believed to not be material to the business, may cause our actual results to differ materially from expected and historical results. You should understand that it is not possible to predict or identify all such factors. Consequently, you should not consider the following to be a complete discussion of all potential risks or uncertainties and the risks described below should be carefully considered together with the other information set forth in this report and in future documents we file with the SEC.

As noted above, we are subject to a number of risks that if realized could cause actual results to differ materially from the results contemplated herein. Some of the more significant risks and uncertainties we face include those summarized below. The summary below is not exhaustive and is qualified by reference to the full set of risk factors set forth in this "Risk Factors"

Our clients include researchers at pharmaceutical and biotechnology companies. Our ability to continue to grow and win new business is dependent in large part upon the ability and willingness of the pharmaceutical and biotechnology industries to continue to spend on molecules in the non-clinical phases of R&D (and in particular discovery and safety assessment) and to outsource the products and services we provide. Furthermore, our clients (particularly larger biopharmaceutical companies) continue to search for ways to maximize the return on their investments with a focus on lowering R&D costs per drug candidate. Fluctuations in the expenditure amounts in each phase of the R&D budgets of these researchers and their organizations could have a significant effect on the demand for our products and services. R&D budgets fluctuate due to changes in available resources, mergers of pharmaceutical and biotechnology companies, spending priorities (including available resources of our biotechnology clients, particularly those that are cash-negative, who may be highly focused on rationing their liquid assets in a challenging funding environment), general economic conditions, institutional budgetary policies and the impact of government regulations, including potential drug pricing legislation. Available funding for biotechnology clients in particular may be affected by the capital markets, investment objectives of venture capital investors and priorities of biopharmaceutical industry sponsors. For additional discussion of the factors that we believe have recently

Further, our Research and GMP-Compliant CellsCell Solutions operations are structured to produce research materials, such as blood products based on customers’ existing demand, and perceived potential changes in demand, for these products. Sudden or unexpected changes in demand for these products could have an adverse impact on our profitability. Increasing demand could harm relationships with customers if we are unable to alter production capacity, or purchase products from other suppliers, to fill orders adequately. This could result in a decrease in overall revenue and profits. The impact of measures intended to reduce the spread of COVID-19 caused us to temporarily suspend blood donations in early 2020, which have since resumed, at our Research and GMP-Compliant Cells facilities, further limiting our ability to respond to changes in demand. Lack of access to sufficient capital, or lack of adequate time to properly (or the failure to adequately) respond to changes in demand, could result in declining revenue and profits, as customers transfer to other suppliers.

Furthermore, we will have significant business which will materially dependdepends upon the regulatory approval of the products it will manufacturemanufactures for its contract development and manufacturing organization (CDMO) customers.clients. As such, if these customersclients experience a delay in, or failure to receive, approval for any of their product candidates or fail to maintain regulatory approval of their products that we develop or manufacture, our revenue and profitability could be materially adversely affected. Additionally, if the Food and Drug AdministrationFDA or a comparable foreign regulatory authority does not approve of our facilities for the manufacture of a customer product, observes significant deficiencies or violations at its facilities or withdraws such approval in the future, our customers may choose to identify alternative manufacturing facilities and/or relationships, which could significantly impact our CDMO capacity and capabilities and results of operations therefrom.

A portion of revenue, predominantly in our RMS segment, is derived from clients at academic institutions and research laboratories whose funding is partially dependent on both the level and timing of funding from government sources such as the U.S. National Institutes of Health (NIH) and similar domestic and international agencies, which can be difficult to forecast. We also sell directly to the NIH and these other agencies. Government funding of R&D is subject to the political process, which is inherently fluid and unpredictable. Our revenue may be adversely affected if our clients delay purchases as a result of uncertainties surrounding the approval of government budget proposals, included reduced allocations to government agencies that fund R&D activities. Government proposals to reduce or eliminate budgetary deficits have sometimes included reduced allocations to the NIH and other government agencies that fund R&D activities, or NIH funding may not be directed towards projects and studies that require the use of our products and services, both of which could adversely affect our business and our financial results. Furthermore,

Governmental agencies throughout the world strictly regulate the drug development process. Our business involves helping our customers navigate these regulatory processes. Accordingly, many regulations, and often new regulations, are expected to result in higher regulatory standards and often additional revenues for companies that service these industries. However, some changes in government budgetary prioritiesregulations, such as a resultrelaxation in regulatory requirements or the introduction of streamlined or expedited drug approval procedures, or an increase in regulatory requirements that we have difficulty satisfying or that make our services less competitive, could eliminate or substantially reduce the COVID-19 pandemicdemand for our services.

For example, in December 2022, the FDA Modernization Act 2.0 was passed, which requires the FDA to develop and the impact of measures intendedimplement a strategy to reduce the spreaduse of COVID-19 could reduce government fundinganimals in testing while maintaining the safety and effectiveness of R&D that is unrelatedmedical products and to explore the disease, which could adversely affectuse of non-animal alternatives to animal testing. Eliminating the use of animals in research may have material adverse effects on our business, results of operations, or financial condition. While there have been significant advancements in the development of alternative methods, the complete elimination of animals in research will be a gradual process that may take many years to achieve. The use of animals in research is highly regulated and proposed changes to current regulations will need to be carefully evaluated to ensure that they do not compromise the safety and efficacy of new drugs and medical treatments.

Although we believe we are currently in compliance in all material respects with applicable national, regional and local laws, as well as other accepted guidance used by oversight bodies (including the USDA, the standards set by the International Air Transport Association, the Convention on International Trade in Endangered Species of Wild Fauna and Flora, USFWS, The Centers for Disease Control, the Department of Transportation, the Department of State, the office of Laboratory Animal Welfare of NIH, the Drug Enforcement Agency, as well as numerous other oversight agencies in the jurisdictions in which we operate), failure to comply could subject us to denial of the right to conduct business, fines, criminal penalties and other enforcement actions. For additional discussion of the factors specifically affecting our financial results.

Implementation of healthcare reform legislation may have certain benefits, but also may contain costs that could limit the disruption or are unable to secure an alternative or secondary supply source on comparable commercial terms. For example, as with other industry participants, certainprofits that can be made from the development of our activities rely on a sufficient supply of large research models, which has seen increasing demand as compared to supply in 2020 and 2021 and into 2022 due to a variety of factors. First, the surge of research relating to COVID-19 has increased short term demand. Second, China supplies a significant portion of certain critical large research models, which have been subject to geographic export restrictions applicable to many animal species since the beginning of the COVID-19 pandemic. While we continue to take steps to find alternative supply channels and lock in supply with preferred sources through multi-year and/or minimum commitment contracts, such mitigating efforts may not prove successful at ensuring a steady and timely supply or may require (and in the past have required) us to pay significantly higher prices for such products during periods of global shortage or restrictions on the transportation of products. Limited global supply or regional restrictions on transportation for certain products may require us to source products from non-preferred vendors, which may not be successful. In addition, reductions in global air transportation routes may result in sourcing alternative transportation at an increased cost. An inability to obtain a sufficient and timely supply of critical productsnew drugs. This could adversely affect ourR&D expenditures by pharmaceutical and biotechnology companies, which could in turn decrease the business financial resultsopportunities available to us both in the U.S. and results of operations.

While it is not possible to predict whether and when any such changes will occur, changes at the blood supply (including COVID-19) could also resultlocal, state or federal level, or in a decreased pool of potential donors or integrity of inventory. Due to any pandemic, epidemic or outbreaklaws and regulations in one or more regionseffect in foreign jurisdictions in which we operate or have business relationships, may significantly impact our Researchdomestic and GMP-Compliant Cells business operates, the portion of the donor pool that typically donates may be unable, or unwilling to donate, thereby significantly reducing the availability of research products upon which we rely. In addition, health and healthcare concerns among the public may result in a decline in donations. If donor participation declines, we may not be able to reduce costs sufficiently to maintain profitability of the Research and GMP-Compliant Cells business.

If the products we manufacture for our customers do not gain market acceptance or production volumes of key products that we manufacture for our customers decline, the financial condition and results of our operations may be adversely affected. For our

CDMO business, we will depend on, and have no control over, market acceptance for the products that we will manufacture for our customers. Consumer demand for these products could be adversely affected by, among other things, delays in securing regulatory approvals, the emergence of competing or alternative products, including generic drugs, the emergence of new safety data for such products, the loss of patent and other intellectual property rights protection, reductions in private and government payment product subsidies or changing product marketing strategies.

The CDMO services we offer can be highly complex, due in part to strict regulatory requirements.requirements and the inherent complexity of the services provided. A failure of our quality control systems in our facilities could cause problems in connection with facility operations for a variety of reasons, including equipment malfunction, viral contamination, failure to follow specific manufacturing instructions, protocols and standard operating procedures, problems with raw materials or environmental factors. Such issues could affect production of a single manufacturing run or manufacturing campaigns, requiring the destruction of products, or could halt manufacturing operations altogether. In addition, any failure to meet required quality standards may result in our failure to timely deliver products to our customers which, in turn, could damage our reputation for quality and service. Any such incident could, among other things, lead to increased costs, lost revenue, reimbursement to customers for lost drug substances, damage to and possibly termination of customer relationships, time and expense spent investigating and remediating the cause and, depending on the cause, similar losses with respect to other manufacturing runs. In addition, such issues could subject us to litigation, the cost of which could be significant.

Our research models and fertile chicken eggs must be free of certain infectious agents, such as certain viruses, parasites, and bacteria, because the presence of these contaminants can distort or compromise the quality of research results andand/or could adversely impact human or animal health. The presence of these infectious agents in our animal production facilities and certain

We are also subject to similar contamination risks with respect to our large research models. While some of these models are owned by us and maintained at our facilities, others are reserved for us and maintained at sites operated by the original provider. Accordingly, risk of contamination may be outside of our control, and we depend on the practices and protocols of third parties to ensure a contamination-free environment. A contamination may require extended CDC quarantine with subsequent reduced sales as a result of lost client orders, as well as the potential for complete inventory loss and disinfection of the affected quarantine rooms. Furthermore, while we often negotiate for contractual risk indemnification, the third party may refuse to fulfill its indemnification obligation or may be unable to as a result of insolvency or other impediments.

Contaminations are unanticipated and difficult to predict and could adversely impact our financial results. If they occur, contaminations typically require cleaning up, renovating, disinfecting, retesting and restarting production or services. Such clean-ups result in inventory loss, clean-up and start-up costs, and reduced sales as a result of lost client orders and potentially credits for prior shipments. In addition to microbiological contaminations, the potential for genetic contaminations also exists and may require us to restart the applicable colonies, and would result in inventory loss, additional start-up costs and possibly reduced sales. Contaminations also expose us to risks that clients will request compensation for damages in excess of our contractual indemnification requirements.

Further, many of our operations are comprised of complex mechanical systems that are subject to periodic failure, including aging fatigue. Such failures are unpredictable, and while we have made significant capital expenditures designed to create redundancy within these mechanical systems, strengthen our biosecurity, improve our operating procedures to protect against such contaminations, and replace impaired systems and equipment in advance of such events, failures and/or contaminations may still occur.

Over the past decade, pharmaceutical and biotechnology companies have generally increased their outsourcing of non-clinical research support activities, such as discovery and safety assessment. While many industry analysts expect the outsourcing trend to continue to increase for the next several years (although with different growth rates for different phases of drug discovery and development), decreases in such outsourcing may result in a diminished growth rate in the sales of any one or more of our

service lines and may adversely affect our financial condition and results of operations. For additional discussion of the factors that we believe have recently influenced outsourcing demand from our clients, please see the section entitled “Our Strategy” above.

The industries in which we operate are highly competitive. We compete for business with other CROsnon-clinical drug development partners and blood product and therapeutic services companies, other CDMOs, as well as internal discovery and development departments within our larger clients, who may have greater resources than ours. We also compete with universities and teaching hospitals for outsourced services. We compete on a variety of factors, including:

More generally, our competitors or others might develop technologies, services or products that are more effective or commercially attractive than our current or future technologies, services or products, or that render our technologies, services or products less competitive or obsolete. If competitors introduce superior technologies, services or products and we cannot make enhancements to ours to remain competitive, our competitive position, and in turn our business, revenue and financial condition, would be materially and adversely affected. In the aggregate, these competitive pressures may affect the attractiveness of our technologies, services or products and could adversely affect our financial results.

We continue to seek opportunities to develop and market new services and products that complement or expand our existing business or service offerings. We believe our ability to in-licenseinnovate through internal research and development efforts and license new technologies from third parties isare both critical to our ability to continue to meet the needs of our clients. Our ability to gain access to such new technologies depends, in part, on our ability to convince innovators that we can successfully develop and commercialize their inventions. We cannot guarantee that we will be able to identify new technologies of interest to our clients. Even if we are able to identify these opportunities, negotiating license agreements on commercially acceptable terms may prove difficult. In addition, our ongoing internal research and development efforts may not always yield offerings that meet client demand. If we are unable to develop new services and products and/or create demand for those newly developed services and products, our future business, results of operations, financial condition and cash flows could be adversely affected.

The EU GDPR also imposes specific restrictions on the transfer of personal data from the EEA to the United States and other so-called third countries outside of the EEA. Similar complexitiesEU and uncertainties also applyEEA, including the use of appropriate safeguards to enable such transfers, from the United Kingdom to third countries.such as Standard Contractual Clauses (SCC). While we have taken steps to mitigate the impact on us, such as implementing the European Commission’s standard contractual clauses (SCCs),SCCs, the efficacy and longevity of these mechanisms remains uncertain. Moreover,In 2022, the EU Commission and the U.S. announced that they have agreed in principle on June 4, 2021, the European Commission adopteda new SCCs, which impose on companies additional obligations relatingTrans-Atlantic Data Privacy Framework. While there remains some uncertainty regarding this framework, it is expected to personal data transfers out of the EEA, including the obligation to update internal privacy practices, conduct transfer impact assessments and, as required, to implement additional security measures. The new SCCs may increase the legal risks and liabilities under EU laws associated with cross-border data transfers, and resultenter into force in material increased compliance and operational costs.2023. If we are otherwise unable to transfer personal data between and among countries and regions in which we operate, it could affect the manner in which we provide our services, the geographical location or segregation of our relevant systems and operations, and could adversely affect our financial results. While we have implemented new controls and procedures to comply with the requirements of the EU GDPR, U.K. GDPR and the data privacy and security laws of other jurisdictions in which we operate, such procedures and controls may not be effective in ensuring compliance or preventing unauthorized transfers of personal data. Additionally, we are subject to the privacy and data protection laws of the UK, including the UK Data Protection Act of 2018 (UK GDPR). Similar to the EU GDPR, the UK GDPR imposes restrictions on the processing of personal data, as well as transfers of personal data from the UK to other countries. On March 25, 2022, the UK adopted a new International Data Transfer Agreement (IDTA) and international data transfer addendum to the EU SCCs for international data transfers (Addendum). Failure to comply with the EU and/or the UK GDPR can result in significant fines and other liability.

In the United States, there are numerous federal and state data privacy and security laws, rules, and regulations governing the collection, use, disclosure, retention, security, transfer, storage and other processing of personal information, including federal and state data privacy laws, data breach notification laws, and data disposal laws. For example, at the federal level, we are subject the regulations of the Federal Trade Commission, which has the authority to regulate and enforce against unfair or deceptive acts or practices in or affecting commerce, including acts and practices with respect to data privacy and security. If our public statements about our use, collection, disclosure and other processing of personal information whether made through our privacy policies, information provided on our website, press statements or otherwise, are alleged to be deceptive, unfair or misrepresentative of our actual practices, we may be subject to potential government or legal investigation or action, including by the Federal Trade Commission or applicable state attorneys general.action. If we are found to have violated applicable laws or regulations, we may also be subject to penalties, fines, damages, injunctions or other outcomes that may adversely affect our operations and financial results. The United States Congress also

has considered, and may in the future consider, various proposals from time to time for comprehensive federal data privacy legislation to which we may become subject if passed and which may adversely affect our operations and financial results.

At the state level, we are subject to laws and regulations like the California Consumer Privacy Act (CCPA), which became effective on January 1, 2020. and the California Privacy Rights Act (CPRA). The CCPA creates transparency requirements for companies and grants California residents various new rights with regard to their personal information.information and the CPRA imposes additional data protection obligations on companies doing business in California. Failure to comply with the CCPA may result in, among other things, significant civil penalties and injunctive relief, or potential statutory or actual damages. The CCPA also provides private right of action for data breaches that result in the loss of personal information, which is expected to increase data breach litigation. In addition, in November 2020, California voters approved the California Privacy Rights Act (CPRA) which modifies the CCPA and will impose additional data protection obligations on companies doing business in California, including granting additional privacy rights to consumers and creating a new state privacy regulator to implement and enforce the CCPA and CPRA. While theThe CPRA will not take effect in most material respects until January 1, 2023, it may impact our business activities and require compliance costs that adversely affect business, operating results, prospects and financial condition. Numerous other states, including Virginia and Colorado, have also enacted or are in the process of enacting or considering comprehensive state-level data privacy and security laws, rules and regulations. These state statutes, and other similar state or federal laws that may be enacted in the future may require us to modify our data processing practices and policies, incur substantial compliance-related costs and expenses, and otherwise suffer adverse impacts on our business.

Additionally, while collecting research products from donors, we may collect, use, disclose, maintain and transmit donor information in ways that will be subject to many of the numerous state, federal and international laws and regulations governing the collection, use, disclosure, storage, transmission or confidentiality of patient-identifiable health information.

We have made changes to, and investments in, our business practices and will continue to monitor developments and make appropriate changes to help attain compliance with these evolving and complex laws, rules, regulations and standards. Any actual or perceived failure to comply with any such laws, rules, regulations, standards or contractual obligations could subject us to denial of the right to conduct business, significant fines, civil or criminal penalties, costly litigation (including class actions), government investigation or inquiries, enforcement actions, claims, proceedings, judgements, awards, penalties, sanctions or other adverse impacts that could have a material adverse effect on our business.

Contractual risk transfer indemnifications generally do not protect us against liability arising from certain of our own actions, such as negligence or misconduct. We could be materially and adversely affected if we are required to pay damages or bear the costs of defending any claim that is outside any contractual indemnification provision, or if a party does not fulfill its indemnification obligations or the damage is beyond the scope or level of insurance coverage. We also often contractually indemnify our clients (subject to a limitation of liability), similar to the way they indemnify us, and we may be materially adversely affected if we have to fulfill our indemnity obligations. Furthermore, either we or a party required to indemnify us may not be able to maintain such insurance coverage (either at all or on terms acceptable to us).

Many of our services, products and processes rely on intellectual property. In some cases, that intellectual property is owned by another party and licensed to us, sometimes exclusively. To protect our intellectual property rights, we primarily rely upon trade secret, patent, and copyright law, as well as contractual provisions relating to intellectual property ownership and control and confidentiality. Laws relating to intellectual property rights and contracts vary from country to country and are subject to change at any time. In addition, the agreements upon which we rely to protect our intellectual property might be breached, or might not be fully enforceable. Our intellectual property rights might not prevent our competitors from independently developing intellectual property that is similar to or duplicative of ours. Also, enforcement of our intellectual property rights may also require substantial investments of time, money, and oversight, and may not result in success. If we are unable to secure and maintain our intellectual property rights, or if we are unable to prevent misappropriation or infringement, our business could be adversely affected.

Customers of Cognate and Vigene, which we acquired in 2021,our CDMO business, for example, may utilize intellectual property for the production of their products, the manufacture of which has been contracted to us. Failure by us and/or our customers to secure and maintain rights to third-party intellectual property rights could have a material adverse effect, including reduced revenue as a result in a delay or cancellation of the manufacture of products and involvement in judicial and administrative proceedings in which we are named as a party.

Further, the drug discovery, drug development, and drug manufacturing industry has a history of patent and other intellectual property litigation and these lawsuits will likely continue. Litigation can be expensive, time consuming, and can divert management’s attention from other business concerns. If we do not prevail in an infringement lawsuit brought against us, we

may be compelled by a court to pay substantial damages, including treble damages, and be ordered to stop the challenged activity, or obtain a license on unnegotiated and/or unfavorable terms.

Unless we consent in writing to the selection of an alternative forum, the sole and exclusive forum for (1) any derivative action or proceeding brought on behalf of the Company, (2) any action asserting a claim of breach of a fiduciary duty owed by any director, officer or other employee of the Company to the Company or the Company’s stockholders, (3) any action asserting a claim arising pursuant to any provision of the Delaware General Corporation Law or the Company’s certificate of incorporation or the Company’s by-laws (in each case, as they may be amended from time to time), or (4) any action asserting a claim governed by the internal affairs doctrine shall be a state court located within the state of Delaware (or, if no state court located within the State of Delaware has jurisdiction, the federal district court for the District of Delaware). However, this exclusive forum provision will not apply to suits brought under the federal securities laws for which the federal courts have exclusive jurisdiction. If a court were to find the choice of forum provision contained in our by-laws to be inapplicable or unenforceable in an action, we may incur additional costs associated with resolving such action in other jurisdictions, which could harm our business and financial condition. Furthermore, although we believe the exclusive forum provision benefits us by providing increased consistency in the application of Delaware law for the specified types of actions and proceedings, this provision may limit a stockholder’s ability to bring a claim in a judicial forum that it finds favorable for disputes with the Company and its directors, officers, or other employees and may discourage lawsuits with respect to such claims.

Our success depends to a significant extent on the continued services of our senior management and other members of management. James C. Foster, our Chief Executive Officer and President since 1992 and Chairman since 2000, has held various positions with us for four decades. While we entered into an amended employment agreement with Mr. Foster in 2021, most members of our senior management do not have employment agreements except in jurisdictions outside of the United States where employment contracts are common for most employees. If Mr. Foster or other members of senior management do not continue in their present positions, our business may be adversely impacted.

Our employees are not unionized in the U.S. Employeesand employees at some of our European facilities are represented by works councils, collective bargaining agreements, employee representative groups and/or unions, which is consistent with local customs for our industry. Our operations depend on the availability and relative costs of labor and maintaining good relations with employees. If we fail to maintain good relations with our team members or with the labor organizations, we may experience labor strikes or work stoppages, which could adversely affect our financial results.

As of December 25, 2021,31, 2022, we had $2.7 billion of debt and finance leases (debt). Our debt could have significant adverse effects on our business, including making it more difficult for us to obtain additional financing on favorable terms; requiring us to dedicate a substantial portion of our cash flows from operations to the repayment of debt and the interest on this debt; limiting our ability to capitalize on significant business opportunities; making us more vulnerable to rising interest rates, and reducing our flexibility to respond to changing business and economic conditions. For additional information regarding our debt, please see Note 9, “Long-Term Debt and Finance Lease Obligations”, included in the notes to our consolidated financial statements included elsewhere in this Form 10-K.

Our results of operations in any quarter may vary from quarter to quarter and are influenced by the risks discussed above, as well as: changes in the general global economy; changes in the mix of our products and services; cyclical buying patterns of our clients; the financial performance of our strategic and venture capital investments; certain acquisition-related adjustments, including change in fair value of contingent payments both receivable from or payable to counterparties; and the occasional extra week (“53rd week”) that we recognize in a fiscal year (and fourth fiscal quarter thereof), including 2022, due to our fiscal year ending on the last Saturday in December. We believe that operating results for any particular quarter are not necessarily a meaningful indication of future results. Nonetheless, fluctuations in our quarterly operating results could negatively affect the market price of our common stock.

There are no unresolved comments to be reported in response to Item 1B.

On February 16, 2023, the Company was informed by the U.S. Department of Justice (DOJ) that in conjunction with the U.S. Fish and Wildlife Service (USFWS), it had commenced an investigation into the Company’s conduct regarding several shipments of non-human primates from Cambodia. On February 17, 2023 the Company received a grand jury subpoena requesting certain documents related to such investigation. The Company is aware of a parallel civil investigation being undertaken by the DOJ and USFWS. The Company is cooperating with the DOJ and the USFWS and believes that the concerns raised with respect to the Company’s conduct are without merit. The Company maintains a global supplier onboarding and oversight program incorporating risk-based due diligence, auditing, and monitoring practices to help ensure the quality of our supplier relationships and compliance with applicable U.S. and international laws and regulations, and has operated under the belief that all shipments of non-human primates it received satisfied the material requirements, documentation and related processes and procedures of the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) documentation and related processes and procedures, which guides the release of each import by USFWS. Notwithstanding our efforts and good-faith belief, in connection with the civil investigation, the Company has voluntarily suspended future shipments of non-human primates from Cambodia until such time that the Company and USFWS can agree upon and implement additional procedures to reasonably ensure that non-human primates imported to the United States from Cambodia are purpose-bred. While these discussions with USFWS are ongoing, the Company has also agreed to continue to care for the Cambodia-sourced non-human primates from certain recent shipments that are now in the United States. We are not partyable to predict what action, if any, legal proceedings that we believe are materialmight be taken in the future by the DOJ, USFWS or other governmental authorities as a result of the investigations. Neither the DOJ nor USFWS has provided the Company with any specific timeline or indication as to our businesswhen

these investigations or financial condition.discussions regarding future processes and procedures will be concluded or resolved. Because it is in the early stages, the Company cannot predict the timing, outcome or possible impact of the investigations, including without limitation any potential fines, penalties or liabilities.

Not applicable.

Our common stock began trading on the New York Stock Exchange on June 23, 2000 under the symbol “CRL.” There were no equity securities that were not registered under the Securities Act of 1933, as amended, sold during fiscal year 2021.2022.

In July 2010, ourOur Board of Directors has authorized, in aggregate, a $500.0 million stock repurchase program and subsequently approved increases to the program of $250.0 million in fiscal year 2010, $250.0 million in fiscal year 2013, $150.0 million in fiscal year 2014, and $150.0 million in fiscal year 2017, for an aggregate authorization of $1.3 billion. During the fourth quarter of fiscal year 2021,2022, we did not repurchase any shares of common stock under our stock repurchase program or in open market trading. As of December 25, 2021,31, 2022, we had $129.1 million remaining on the authorized stock repurchase program.

Additionally, our stock-based compensation plans permit the netting of common stock upon vesting of restricted stock, restricted stock units, and performance share units in order to satisfy individual statutory tax withholding requirements.

Not applicable.

The following discussion should be read in conjunction with our consolidated financial statements and related notes appearing in Item 8, “Financial Statements and Supplementary Data” in this Annual Report on Form 10-K. A discussion of our results of operations for the fiscal year ended December 26, 202025, 2021 and a comparison of our results for the fiscal years ended December 26, 202025, 2021 and December 28, 201926, 2020 was included in Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” of our Annual Report on Form 10-K for the fiscal year ended December 26, 2020,25, 2021, filed with the SEC on February 17, 2021.16, 2022. In addition to historical consolidated financial information, the following discussion contains forward-looking statements. Actual results may differ significantly from those projected in the forward-looking statements. Factors that might cause future results to differ materially from those projected in the forward-looking statements include, but are not limited to, those discussed in Item 1A, “Risk Factors” and elsewhere in this Annual Report on Form 10-K. Certain percentage changes may not recalculate due to rounding.

Our client base includes major global biopharmaceuticalpharmaceutical companies, many biotechnology companies; agricultural and industrial chemical, life science, veterinary medicine, medical device, diagnostic and consumer product companies; contract research and contract manufacturing organizations; and other commercial entities, as well as leading hospitals, academic institutions, and government agencies around the world. We currently operate in over 110150 locations and in over 2021 countries worldwide, which numbers exclude ourcertain Insourcing Solutions (IS) sites.

Our RMS reportable segment includes the Research Models, Research Model Services, and Research and GMP-Compliant CellsCell Solutions businesses. Research Models includes the commercial production and sale of small research models, as well as the supply of large research models. Research Model Services includes: Genetically Engineered Models and Services (GEMS), which performs contract breeding and other services associated with genetically engineered models; Research Animal Diagnostic Services (RADS), which provides health monitoring and diagnostics services related to research models; and Insourcing Solutions (IS), which provides colony management of our clients’ research operations (including recruitment, training, staffing, and management services). Research within our clients’ facilities as well as our own vivarium space, utilizing both our Charles River Accelerator and GMP-Compliant Cells suppliesDevelopment Lab (CRADL) and our Explora BioLabs options. Cell Solutions provides controlled, consistent, customized primary cells and blood components derived from normal and mobilized peripheral blood, bone marrow, and cord blood.

On February 16, 2023, we were informed by the U.S. Department of Justice (DOJ) that in conjunction with the U.S. Fish and Wildlife Service (USFWS), it had commenced an investigation into our conduct regarding several shipments of non-human primates from Cambodia. On February 17, 2023 we received a largely remote working environment. Although there is uncertainty overgrand jury subpoena requesting certain documents related to such investigation. We are aware of a parallel civil investigation being undertaken by the durationDOJ and USFWS. We are cooperating with the DOJ and the USFWS and believe that the concerns raised with respect to our conduct are without merit. We maintain a global supplier onboarding and oversight program incorporating risk-based due diligence, auditing, and monitoring practices to help ensure the quality of our supplier relationships and compliance with applicable U.S. and international laws and regulations, and has operated under the belief that all shipments of non-human primates we received satisfied the material requirements, documentation and related processes and procedures of the COVID-19 pandemic disruption,Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) documentation and related processes and procedures, which guides the release of each import by USFWS. Notwithstanding our efforts and good-faith belief, in connection with the civil investigation, we have voluntarily suspended future shipments of non-human primates from Cambodia until such time that we and USFWS can agree upon and implement additional procedures to reasonably ensure that non-human primates imported to the United States from Cambodia are purpose-bred. While these discussions with USFWS are ongoing, we have also agreed to continue to care for the Cambodia-sourced non-human primates from certain recent shipments that are now in the United States. The carrying value of the inventory related to these shipments is approximately $20 million. We are not able to predict what action, if any, might be taken in the future by the DOJ, USFWS or other governmental authorities as a result of the investigations. Neither the DOJ nor USFWS has provided us with any specific timeline or indication as to when these investigations or discussions regarding future processes and procedures will be concluded or resolved. Because it is in the early stages, we cannot predict the timing, outcome or possible impact of the investigations, including without limitation any potential fines, penalties or liabilities. Refer to Item 1A, “Risk Factors” and Item 3, “Legal Proceedings” disclosed herein for our assessment of risk factors surrounding this matter.

Our strategy is to augment internal growth of existing businesses with complementary acquisitions. We continue to make strategic acquisitions designed to expand our portfolio of products and services to support the drug discovery and development continuum. Our recent acquisitions are described below.

On June 28, 2021, we acquired Vigene Biosciences, Inc. (Vigene), a gene therapy contract development and manufacturing organization (CDMO),CDMO, providing viral vector-based gene delivery solutions. The acquisition enables clients to seamlessly conduct analytical testing, process development, and manufacturing for advanced modalities with the same scientific partner. The preliminary purchase price of Vigene was $323.9 million, net of $2.7 million in cash, and includes $34.5 million of contingent consideration (maximum contingent payments of up to $57.5 million based on future performance). The acquisition was funded through a combination of available cash and proceeds from our Credit Facility. This business is reported as part of our Manufacturing reportable segment. As of December 31, 2022, the fair value of the contingent consideration was zero as certain financial targets have not and are not expected to be achieved.

On March 30, 2021, we acquired Retrogenix Limited (Retrogenix), an early-stage CRO providing specializedoutsourced discovery services provider specializing in bioanalytical services utilizing its proprietary cell microarray technology. The acquisition of Retrogenix enhances our scientific expertise with additional large molecule and cell therapy discovery capabilities. The purchase price of Retrogenix was $53.9 million, net of $8.5 million in cash. Included in the purchase price are additional payments up to $6.9 million, which are contingent on future performance. The acquisition was funded through a combination of available cash and proceeds from our Credit Facility. This business is reported as part of our DSA reportable segment.

On March 29, 2021, we acquired Cognate BioServices, Inc. (Cognate), a cell and gene therapy CDMO offering comprehensive manufacturing solutions for cell therapies, as well as for the production of plasmid DNA and other inputs in the CDMO value chain. The acquisition of Cognate establishes us as a scientific partner for cell and gene therapy development, testing, and manufacturing, providing clients with an integrated solution from basic research and discovery through cGMP production. The preliminary purchase price of Cognate was $879.0$877.9 million, net of $70.5 million in cash, subject to certain post-closing adjustments and includes $15.7 million of consideration for an approximate 2% ownership interest not acquired.initially acquired, but redeemed in April 2022 with the ultimate payout tied to performance in 2021. The acquisition was funded through a combination of available cash and proceeds from our Credit Facility and recentlySenior Notes issued Senior Notes.in fiscal 2021. This business is reported as part of our Manufacturing reportable segment.

On March 3, 2021, we acquired certain assets from a distributor that supports our DSA reportable segment. The purchase price was $35.4 million, which includes $19.5 million in cash paid ($5.5 million of which was paid in fiscal 2020), and $15.9 million of contingent consideration (the maximum contingent contractual payments are up to $17.5 million). The business is reported as part of our DSA reportable segment. As of December 31, 2022, the fair value of the contingent consideration was zero as certain operational targets were not achieved.

On August 6, 2020,December 20, 2022, we acquired Cellero, LLC (Cellero), a provider of cellular products for cell therapy developers and manufacturers worldwide. The addition of Cellero enhances our unique, comprehensive solutions forcompleted the high-growth cell therapy market, strengthening our ability to help accelerate clients’ critical programs from basic research and proof-of-concept to regulatory approval and commercialization. It also expands our access to high-quality, human-derived biomaterials with Cellero’s donor sites in the United States. The purchase price for Cellero was $36.9 million, net of $0.5 million in cash. The acquisition was funded through available cash. This business is reported as partsale of our RMS reportable segment.

On October 12, 2021, we completed two separate divestitures. We sold our RMS Japan operations to The Jackson Laboratory for a preliminary purchase price of $73.5$70.9 million, which included $8.2$7.9 million in cash, $3.6$3.8 million pension over funding, and certain post-closing adjustments. We also sold our gene therapy CDMO site in Sweden to a private investor group for a preliminary purchase price of $59.6 million, net of $0.2 million in cash and certain post-closing adjustments. Included in the purchase price are contingent payments fair valued at $15.3 million, (the maximum contingent contractual payments are up to $25.0 million based on future performance), as well as a purchase obligation of approximately $10 million between the parties. As of December 31, 2022, the fair value of the contingent payments was reduced to $7.5 million as certain financial targets are not expected to be achieved.

Our fiscal year is typically based on 52-weeks, with each quarter composed of 13 weeks ending on the last Saturday on, or closest to, March 31, June 30, September 30, and December 31. A 53rd week in the fourth quarter of the fiscal year is occasionally necessary to align with a December 31 calendar year-end, which will occuroccurred in fiscal year 2022.

Many ofDemand and pricing for our pharmaceuticalResearch Models and biotechnology clients intensified their use of strategic outsourcing during 2021Services increased meaningfully due to move their early-stage research programs forward in an efficient and cost-effective manner. Small and mid-size biotechnology clients continued to be the primary driver of revenue growth as these clients benefited from the sustained strength of the biotechnology funding environment in fiscal year 2021, from capital markets, partnering with large biopharmaceutical companies, and investment by venture capital, as well as the enhanced globalour clients’ focus on scientific innovation resulting in increased biomedical research activity, which drove robust revenue growth in fiscal year 2022. This was particularly true in North America and emphasized greater investmentChina, with China reporting healthy growth rates despite a modest impact from COVID-19 in their preclinical pipelines. Many of our large biopharmaceutical clients have2022. Demand for research model services continued to increase investmentsperform very well, led by our Insourcing Solutions business, particularly our CRADL™ operations. Clients are increasingly adopting CRADL™’s flexible model to access laboratory space without having to invest in theirinternal infrastructure. To support client demand, we are continuing to expand CRADL™’s footprint both organically and through the acquisition of Explora BioLabs in April 2022. We are confident that research models and services will remain essential tools for our clients’ drug discovery and early-stage development efforts and have strengthened their relationships with both CROs, like us, and biotechnology companies to assist them in bringing new drugs to market. Clients continue to seek to outsource larger portions of their early-stage drug research programs to us, which is leading to new business opportunities as clients adopt more flexible and efficient research and development models.efforts.

Our DSA reportable segment continued to benefit from these trends in fiscal year 2021.2022. Robust Safety Assessment revenue growth was primarily driven by unprecedented client demand and increased pricing, which was supported by record backlog levels. We believe the acquisitions of Citoxlab (2019), MPI Research (2018), and WIL Research (2016) have solidifiedthat our comprehensive scientific capabilities and global scale, andas well as the breadth and depth of our scientific expertise, quality, and responsiveness remain key criteria when our clients make the decision to outsource to us. As biotechnology funding remains robust and ourBiotechnology clients continue to pursuemove their programs forward and utilize outsourcing to achieve their goal of more efficient and effective drug research to bring innovative new therapies to market, they are evaluating outsourcing more of their research programs, such as discovery services.market. We continued to enhance our Discovery Services capabilities to provide clients with a comprehensive portfolio that enables them to start working with us at the earliest stages of the discovery process. We have accomplished this in recent years through acquisitions including Retrogenix and Distributed Bio in fiscal year 2021, Citoxlab’s discovery services, KWS BioTest in 2018 and Brains On-Line in 2017, and throughby adding cutting-edge capabilities to our discovery toolkit through partnerships, such as BitBio, Cypre, Fios Genomics, and most recently, discovery artificial intelligence (AI) partners Valence Discovery and Valo.technology partnerships. In fiscal year 2021,2022, demand in our Discovery Services business also increased, significantly,but moderated from prior-year levels as our effortssome clients took longer to enhance our scientific capabilities, provide clients with flexible partnering models, and become a trusted scientific partner for our clients’ early-stage programs have been successful.commence new projects.

During fiscal year 2021,2022, our cash flows from operations was $760.8$619.6 million compared with $546.6$760.8 million for fiscal year 2020.2021. The increasedecrease was driven by higher net income and improvements fromchanges in our working capital initiatives, includingbalances, principally the timing of vendor and supplier paymentsour revenue and collections of net contract balances from contracts with customers (collectively trade receivables and contract assets, net; deferred revenue; and customer contract deposits) and timing of payments to vendors, increased inventory purchases to support growth initiatives of our businesses, principally Safety Assessment, and higher variable compensation payments in 2022 as compared to the same period in 2020.

Our discussion and analysis of our financial condition and results of operations is based upon our consolidated financial statements prepared in accordance with generally accepted accounting principles in the United States (U.S.). The preparation of these financial statements requires us to make certain estimates and assumptions that may affect the reported amounts of assets and liabilities, the reported amounts of revenues and expenses during the reported periods and related disclosures. These estimates and assumptions are monitored and analyzed by us for changes in facts and circumstances, and material changes in these estimates could occur in the future. We base our estimates on our historical experience, trends in the industry, and various other factors that are believed to be reasonable under the circumstances. Actual results may differ from our estimates under different assumptions or conditions.

Revenue is recognized when, or as, obligations under the terms of a contract are satisfied, which occurs when control of the promised products or services is transferred to customers. Revenue is measured as the amount of consideration we expect to receive in exchange for transferring products or services to a customer (“transaction price”).

To the extent the transaction price includes variable consideration, we estimate the amount of variable consideration that should be included in the transaction price utilizing the amount to which we expect to be entitled. Variable consideration is included in the transaction price if, in our judgment, it is probable that a significant future reversal of cumulative revenue under the contract will not occur. Estimates of variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of our anticipated performance and all information (historical, current and forecasted) that is reasonably available. Sales, value add, and other taxes collected on behalf of third parties are excluded from revenue.

When determining the transaction price of a contract, an adjustment is made if payment from a customer occurs either significantly before or significantly after performance, resulting in a significant financing component. Generally, we do not extend payment terms beyond one year. Applying the practical expedient, we do not assess whether a significant financing component exists if the period between when we perform our obligations under the contract and when the customer pays is one year or less. Our contracts do not generally contain significant financing components.

Contracts with customers may contain multiple performance obligations. For such arrangements, the transaction price is allocated to each performance obligation based on the estimated relative standalone selling prices of the promised products or services underlying each performance obligation. We determine standalone selling prices based on the price at which the performance obligation is sold separately. If the standalone selling price is not observable through past transactions, we estimate the standalone selling price taking into account available information such as market conditions and internally approved pricing guidelines related to the performance obligations.

Contracts are often modified to account for changes in contract specifications and requirements. Contract modifications exist when the modification either creates new, or changes existing, enforceable rights and obligations. Generally, when contract modifications create new performance obligations, the modification is considered to be a separate contract and revenue is recognized prospectively. When contract modifications change existing performance obligations, the impact on the existing transaction price and measure of progress for the performance obligation to which it relates is generally recognized as an adjustment to revenue (either as an increase in or a reduction of revenue) on a cumulative catch-up basis.

Product revenue is generally recognized when the customer obtains control of our product, which occurs at a point in time, and may be upon shipment or upon delivery based on the contractual shipping terms of a contract. Service revenue is generally recognized over time as the services are delivered to the customer based on the extent of progress towards completion of the performance obligation. The selection of the method to measure progress towards completion requires judgment and is based on the nature of the products or services to be provided. Depending on which better depicts the transfer of value to the customer, we generally measure our progress using either cost-to-cost (input method) or right-to-invoice (output method). We use the cost-to-cost measure of progress when it best depicts the transfer of value to the customer which occurs as we incur costs on our contract, generally related to fixed fee service contracts. Under the cost-to-cost measure of progress, the extent of progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs at completion of the performance obligation. The costs calculation includes variables such as labor hours, allocation of overhead costs, research model costs, and subcontractor costs. Revenue is recorded proportionally as costs are incurred. The right-to-invoice measure of progress is generally related to rate per unit contracts, as the extent of progress towards completion is measured based on discrete service or time-based increments, such as samples tested or labor hours incurred. Revenue is recorded in the amount invoiced since that amount corresponds directly to the value of our performance to date. During fiscal year 2021, $2.12022, $2.4 billion, or approximately 60%, of our total revenue recognized ($3.54.0 billion) is DSA service revenue transferred over time.

We prepare and file income tax returns based on our interpretation of each jurisdiction’s tax laws and regulations. In preparing our consolidated financial statements, we estimate our income tax liability in each of the jurisdictions in which we operate by estimating our actual current tax expense together with assessing temporary differences resulting from differing treatment of items for tax and financial reporting purposes. These differences result in deferred tax assets and liabilities, which are included in our consolidated balance sheets. Significant management judgment is required in assessing the realizability of our deferred tax assets. In performing this assessment, we consider whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. In making this determination, under the applicable financial accounting standards, we are allowed to consider the scheduled reversal of deferred tax liabilities, projected

We account for uncertain tax positions using a “more-likely-than-not” threshold for recognizing and resolving uncertain tax positions. We evaluate uncertain tax positions on a quarterly basis and consider various factors, that include, but are not limited to, changes in tax law, the measurement of tax positions taken or expected to be taken in tax returns, the effective settlement of matters subject to audit, information obtained during in process audit activities and changes in facts or circumstances related to a tax position. We adjust the level of the liability to reflect any subsequent changes in the relevant facts surrounding the uncertain positions. Our liabilities for uncertain tax positions can be relieved only if the contingency becomes legally extinguished through either payment to the taxing authority or the expiration of the statute of limitations, the recognition of the benefits associated with the position meet the “more-likely-than-not” threshold or the liability becomes effectively settled through the controversy process. We consider matters to be effectively settled once the taxing authority has completed all of its required or expected examination procedures, including all appeals and administrative reviews; we have no plans to appeal or litigate any aspect of the tax position; and we believe that it is highly unlikely that the taxing authority would re-examine the related tax position. We also accrue for potential interest and penalties related to unrecognized tax benefits in income tax expense.

We generally receive a tax deduction upon the exercise of non-qualified stock options by employees, or the vesting of restricted stock and performance share units held by employees. The stock price, timing, and amount of vesting and exercising of stock-based compensation could materially impact our current tax expense.

We use assumptions and estimates in determining the fair value of assets acquired and liabilities assumed in a business combination. The determination of the fair value of intangible assets, which representrepresents a significant portion of the purchase price in many of our acquisitions, requires the use of significant judgment with regard to (i) the fair value; and (ii) whether such intangibles are amortizable or non-amortizable and, if the former, the period and the method by which the intangible asset will be amortized. We utilize commonly accepted valuation techniques, such as the income, cost and market approaches, as appropriate, in establishing the fair value of intangible assets. Typically, key assumptions include projections of cash flows that arise from identifiable intangible assets of acquired businesses as well as discount rates based on an analysis of the weighted average cost of capital, adjusted for specific risks associated with the assets.

In our recent acquisitions, customer relationship intangible assets (also referred to as client relationships) have been the most significant identifiable assets acquired. To determine the fair value of the acquired client relationships, we utilized the multiple period excess earnings model (a commonly accepted valuation technique), which includes the following key assumptions: projections of cash flows from the acquired entities, which included future revenue growth rates, operating income margins, and customer attrition rates; as well as discount rates based on an analysis of the acquired entities’ weighted average cost of capital. The value of the client relationshipsrelationship acquired were $257.2was $64.0 million for Cognate, $87.5 million for Vigene, $17.3 million for Retrogenix and $16.1 million for Distributed Bio in fiscal year 2021. Client relationships acquired for fiscal year 2020 were valued at $170.42022 and $378.1 million for HemaCare and $14.7 million for Cellero.fiscal year 2021 related to business combinations.

We review definite-lived intangible assets for impairment when indication of potential impairment exists, such as a significant reduction in cash flows associated with the assets. Actual cash flows arising from a particular intangible asset could vary from projected cash flows which could imply different carrying values from those established at the dates of acquisition and which could result in impairment of such asset. No significant impairments were recognized during fiscal years 20212022 and 2020.2021.

We evaluate goodwill for impairment annually, during the fourth quarter, and when events occur or circumstances change that may reduce the fair value of the asset below its carrying amount. Events or circumstances that might require an interim evaluation include unexpected adverse business conditions, economic factors, unanticipated technological changes or competitive activities, loss of key personnel and acts by governments and courts. Estimates of future cash flows require assumptions related to revenue and operating income growth, asset-related expenditures, working capital levels and other factors. Different assumptions from those made in our analysis could materially affect projected cash flows and our evaluation of goodwill for impairment.

We perform the quantitative impairment test where we compare the fair value of our reporting units to their carrying values. If the carrying values of the net assets assigned to the reporting units exceed the fair values of the reporting units, then we would record an impairment loss equal to the difference. In fiscal years 20212022 and 20202021 we performed the quantitative goodwill impairment test for our reporting units. Fair value was determined by using a weighted combination of a market-based approach and an income approach, as this combination was deemed to be the most indicative of our fair value in an orderly transaction between market participants. Under the market-based approach, we utilized information about our company as well as publicly available industry information to determine earnings multiples and sales multiples that are used to value our reporting units.

Long-lived assets to be held and used, including property, plant, and equipment, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets or asset group may not be recoverable. Factors we consider important that could trigger an impairment review include, but are not limited to, the following:

Determination of recoverability is based on an estimate of undiscounted future cash flows resulting from the use of the asset, net of any sublease income, if applicable, and its eventual disposition. In the event that such cash flows are not expected to be sufficient to recover the carrying amount of the assets, the assets are written-down to their fair values. We measure any impairment based on a projected discounted cash flow method using a discount rate determined by management to be commensurate with the risk inherent in our current business model. Significant judgments are required to estimate future cash flows, including the selection of appropriate discount rates and other assumptions. We may also estimate fair value based on

market prices for similar assets, as appropriate. Changes in these estimates and assumptions could materially affect the determination of fair value for these assets. No significant impairments were recognized during fiscal years 2021year 2022 and 2020.2021.

Several of our U.S. and non-U.S. subsidiaries sponsor defined benefit pension and other post-retirement benefit plans. We recognize the funded status of our defined benefit pension and other postretirement benefit plans as an asset or liability. This amount is defined as the difference between the fair value of plan assets and the benefit obligation. We measure plan assets and benefit obligations as of the date of our fiscal year end.

The cost and obligations of these arrangements are calculated using many assumptions to estimate the benefits that the employee earns while working, the amount of which cannot be completely determined until the benefit payments cease. Major assumptions used in the accounting for these employee benefit plans include the expected return on plan assets, withdrawal and mortality rates, discount rate, and rate of increase in employee compensation levels. Assumptions are determined based on our data and appropriate market indicators, and are evaluated each year as of the plans’ measurement date. Should any of these assumptions change, they would have an effect on net periodic pension costs and the unfunded benefit obligation.

The expected long-term rate of return on plan assets reflects the average rate of earnings expected on the funds invested, or to be invested, to provide for the benefits included in the projected benefit obligations. In determining the expected long-term rate of return on plan assets, we consider the relative weighting of plan assets, the historical performance of total plan assets and individual asset classes and economic and other indicators of future performance.

The rate of compensation increase reflects the expected annual salary increases for the plan participants based on historical experience and the current employee compensation strategy.

For a discussion of new accounting pronouncements, refer to Note 1, “Description of Business and Summary of Significant Accounting Policies” to our consolidated financial statements contained in Item 8, “Financial Statements and Supplementary Data,” in this Annual Report on Form 10-K.

The following tables present consolidated revenue by type and by reportable segment:

The following table presents operating income by reportable segment:

The following presents and discusses our consolidated financial results by each of our reportable segments:

Other (Expense) Income, Net

We currently require cash to fund our working capital needs, capital expansion, acquisitions, and to pay our debt, lease, venture capital investment,and strategic equity investments, and pension obligations. Our principal sources of liquidity have been our cash flows from operations, recent divestitures, supplemented by long-term borrowings. Based on our current business plan, we believe that our existing funds, when combined with cash generated from operations and our access to financing resources, are sufficient to fund our operations for the foreseeable future. Our liquidity and capital resources have not been materially impacted by the COVID-19 pandemic.

The following table presents our cash, cash equivalents and short-term investments: