PRESS RELEASE

Investment in HiddenLayer advances protection for federal AI missions September 26, 2023 McLean, VA – Booz Allen Hamilton (NYSE: BAH)—the largest single provider of artificial intelligence services for the federal government—today announced that its corporate venture capital arm, Booz Allen Ventures, has made a strategic investment in HiddenLayer, a security platform that safeguards machine learning (ML) models. This investment strengthens and expands Booz Allen’s tenured adversarial AI capabilities, including those developed for the Department of Defense and intelligence clients, and will further accelerate secure adoption of enterprise AI solutions to keep pace with emerging national security threats as well as rising consumer expectations. “Every AI-enabled solution should be assessed for risk and appropriately protected from adversarial attacks—especially as the government looks to deploy AI capabilities in increasingly important applications,” said Matt Keating, leader of Booz Allen’s Adversarial AI portfolio. “Our clients operate in complex environments that require AI models to be highly specialized, rapidly deployable, and secure. The HiddenLayer investment by Booz Allen Ventures better positions us to integrate startup, commercial, and open-source innovation to rapidly augment our existing capabilities. Ultimately, it allows us to more quickly and confidently deliver robust AI capability to our clients—and the country at large.” With increased AI adoption, specifically AI models deployed within mission-critical systems, the risk surface increases for federal, defense, civil, national security, and commercial users, with bad actors looking to exploit and accelerate cyber threats. The newly announced investment in HiddenLayer will complement and accelerate Booz Allen’s existing adversarial AI capabilities, a leader for over five years in advancing machine learning (ML) methodologies to safeguard systems against attack. This includes a long-standing focus on addressing key challenges with model security, such as data poisoning, data leakage, model evasion, and malicious code injection. In addition, Booz Allen has also led advanced research to assess the adversarial image perturbation robustness for computer vision models and how manipulated tabular data can enhance the behavior evasive capabilities of Microsoft Windows malware.  “Using pre-trained open-source models is an overall net positive, but this foundation also puts AI models at greater risk for adversarial attack. This tension is a threat that organizations need to be aware of, plan for, and get ahead of, as our adversaries are doing just that,” said Edward Raff, chief scientist at Booz Allen and leader of the Booz Allen ML research team, which has been publishing academic research on adversarial AI since 2018. This is the latest AI-focused investment by Booz Allen Ventures, which identifies and invests in strategic, dual-use commercial technologies, with recent investments including Shift5, Credo AI, Hidden Level, Latent AI, Synthetaic, and Reveal Technology. The investment also builds on Booz Allen’s focused efforts and missions around generative AI and responsible AI, providing a robust security foundation as AI use increases. “HiddenLayer’s powerful platform and expert team has proven effective in securing AI from a broad range of threats, so we quickly identified them as a partner that can support and protect our AI deployments,” said Travis Bales, managing director at Booz Allen Ventures. “From our early discussions, it was clear to us that the HiddenLayer team has the vision and execution to continue developing security for the emerging AI market.” Booz Allen’s recent investment now enables federal agencies to capitalize on HiddenLayer’s award-winning Machine Learning Detection & Response platform, as well as Booz Allen’s AI security research, risk and vulnerability assessments, and managed detection and response services—all paired with AI security engineering best practices, tools, and technologies. “Booz Allen continuously proves its commitment to developing AI capabilities that are robust, secure, and offer the technical depth needed by the federal government. Their 360-degree approach to AI combined with their steadfast commitment to HiddenLayer’s vision since our founding made them a perfect partner for the next stage of our growth,” said Chris Sestito, co-founder and CEO of HiddenLayer. “Bringing together our MLSec platform and their purpose-built AI solutions ensures the  government can continue to innovate through AI adoption with confidence knowing they are secure from all types of cyberattacks, including those from nation-states.” Learn more about Booz Allen’s work in adversarial AI and about Booz Allen Ventures. About Booz Allen Hamilton Trusted to transform missions with the power of tomorrow’s technologies, Booz Allen Hamilton advances the nation’s most critical civil, defense, and national security priorities. We lead, invest, and invent where it’s needed most—at the forefront of complex missions, using innovation to define the future. We combine our in-depth expertise in AI and cybersecurity with leading-edge technology and engineering practices to deliver impactful solutions. Combining more than 100 years of strategic consulting expertise with the perspectives of diverse talent, we ensure results by integrating technology with an enduring focus on our clients. We’re first to the future—moving missions forward to realize our purpose: Empower People to Change the World®. With global headquarters in McLean, Virginia, our firm employs more than 32,600 people globally as of June 30, 2023 and had revenue of $9.3 billion for the 12 months ended March 31, 2023. To learn more, visit www.boozallen.com. (NYSE: BAH) Contacts  Media Relations: Amanda Allison-Martini, Allison_Amanda@bah.com    Investor Relations: Nathan P. Rutledge, Rutledge_Nathan@bah.com   

New AI capabilities expand federal mission success October 11, 2023 McLean, VA – Booz Allen Hamilton (NYSE: BAH) today announced new insights from its AI portfolio, doubling down on the firm’s leading role in deploying AI for the federal government and accelerating the ability to achieve critical mission success via a new stack of AI capabilities.  Booz Allen is well positioned to meet the evolving needs of its clients, having been recently recognized as the largest provider of AI-related services to the federal government by a leading provider of market intelligence, GovWin from Deltek. Bringing learnings from long-standing client engagements to support those growing federal needs, Booz Allen has scaled and focused its AI portfolio to offer new, specialized AI technology stacks that help clients achieve mission objectives more rapidly, cost effectively, and at enterprise scale. Initial development areas include: As new areas of capability demand are identified, additional stacks will be added in the future. These new AI stacks build on Booz Allen’s established AI portfolio, which includes AI Strategy, AI Engineering, Model Development, and Quantum Sciences, in addition to a dedicated R&D team. The solutions are underpinned by Booz Allen’s recently launched AI factory, aiSSEMBLE™, which provides a holistic approach to designing, developing, and fielding AI for the federal government with reusable components and configurable templates to foster scalable enterprise AI. “Booz Allen remains steps ahead in today’s AI environment with our newly launched AI stacks. We are focused on safely, responsibly, and quickly bringing real AI solutions to the federal government using explainable, trustworthy technology,” said John Larson, executive vice president at Booz Allen and leader of the firm’s AI practice. “Our clients operate in complex environments that demand AI capabilities be reliable, scalable, and specialized for mission applications,” said Larson. “We’ve listened to these needs and developed an AI service catalog that empowers our talent to deliver differentiated AI capabilities at the speed of need and can operate securely—across on-premises, in cloud, hybrid cloud, or multicloud environments, and at the edge—to accelerate what comes next for our clients’ missions.” With nearly 200 active AI projects across defense, national security, and civil missions—including three of the largest AI contracts within the Department of Defense—Booz Allen’s portfolio and client impact demonstrates the firm’s decades-long commitment to bringing AI out of the lab and providing real-world value. “The strength of Booz Allen is our connection to our clients’ missions and deep understanding of the impactful, meaningful technology required to solve their toughest challenges—which in turn, benefits the country and its citizens,” said Susan Penfield, chief technology officer at Booz Allen. “We are proudly and proficiently continuing to make AI impact for our clients, integrating best-in-breed commercial technology to accelerate mission success at the intersection of “AI &” in a highly reliable, repeatable way.” Read more about Booz Allen’s AI milestones and expertise and find an AI career at Booz Allen. About Booz Allen Hamilton Trusted to transform missions with the power of tomorrow’s technologies, Booz Allen Hamilton advances the nation’s most critical civil, defense, and national security priorities. We lead, invest, and invent where it’s needed most—at the forefront of complex missions, using innovation to define the future. We combine our in-depth expertise in AI and cybersecurity with leading-edge technology and engineering practices to deliver impactful solutions. Combining more than 100 years of strategic consulting expertise with the perspectives of diverse talent, we ensure results by integrating technology with an enduring focus on our clients. We’re first to the future—moving missions forward to realize our purpose: Empower People to Change the World®. With global headquarters in McLean, Virginia, our firm employs more than 32,600 people globally as of June 30, 2023 and had revenue of $9.3 billion for the 12 months ended March 31, 2023. To learn more, visit www.boozallen.com. (NYSE: BAH) Forward Looking Statements Certain statements contained in this presentation and in related comments by our management include “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995.  Examples of forward-looking statements include statements that do not directly relate to any historical or current fact.  In some cases, you can identify forward-looking statements by terminology such as “may,” “will,” “could,” “should,” “forecasts,” “expects,” “intends,” “plans,” “anticipates,” “projects,” “outlook,” “believes,” “estimates,” “predicts,” “potential,” “continue,” “preliminary,” or the negative of these terms or other comparable terminology.  Although we believe that the expectations reflected in the forward-looking statements are reasonable, we can give you no assurance these expectations will prove to have been correct. These forward-looking statements relate to future events or our future financial performance and involve known and unknown risks, uncertainties and other factors that may cause our actual results, levels of activity, performance or achievements to differ materially from any future results, levels of activity, performance or achievements expressed or implied by these forward-looking statements. A number of important factors could cause actual results to differ materially from those contained in or implied by these forward-looking statements, including those factors discussed in our filings with the Securities and Exchange Commission (SEC), including our Annual Report on Form 10-K for the fiscal year ended March 31, 2023, which can be found at the SEC’s website at www.sec.gov.  All forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by the foregoing cautionary statements.  All such statements speak only as of the date made and, except as required by law, we undertake no obligation to update or revise publicly any forward-looking statements, whether as a result of new information, future events or otherwise. Contacts Media Relations: Amanda Allison-Martini, Allison_Amanda@bah.com Investor Relations: Nathan P. Rutledge, Rutledge_Nathan@bah.com

Progress on environmental, social, and governance goals November 14, 2023 McLean, VA – Booz Allen Hamilton (NYSE: BAH) today published its 2023 Environmental, Social, Governance (ESG) Report, detailing continued progress and showcasing how the company’s ESG commitments and performance integrate with its VoLT (Velocity, Leadership, Technology) growth strategy and business performance. The 2023 report details goals, activities, and progress for material ESG topics within three impact pillars: The report also includes updates on the firm’s workforce demographics and trends, and employee wellbeing and technical training programs. “Booz Allen’s purpose is simple and bold: empower people to change the world,” said Booz Allen Executive Vice President Nancy Laben, chief legal officer and chair of Booz Allen’s board-chartered ESG Committee. “Our intentional, data-driven approach to ESG is essential to our business performance as well as our culture as we work to create a more secure, resilient, and equitable future for all.” To learn more and read the full report, visit Environmental, Social, Governance at Booz Allen. Safe Harbor Statement Certain statements contained in this press release and the ESG Report include “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Examples of forward-looking statements include statements that do not directly relate to any historical or current fact. In some cases, you can identify forward-looking statements by terminology such as “may,” “will,” “could,” “should,” “forecasts,” “expects,” “intends,” “plans,” “anticipates,” “projects,” “outlook,” “believes,” “estimates,” “predicts,” “potential,” “continue,” “preliminary,” or the negative of these terms or other comparable terminology. Although we believe that the expectations reflected in the forward-looking statements are reasonable, we can give you no assurance these expectations will prove to have been correct. These forward-looking statements relate to future events or our future financial performance and involve known and unknown risks, uncertainties and other factors that may cause our actual results, levels of activity, performance, or achievements to differ materially from any future results, levels of activity, performance or achievements expressed or implied by these forward-looking statements. A number of important factors could cause actual results to differ materially from those contained in or implied by these forward-looking statements, including those factors discussed in our filings with the Securities and Exchange Commission (SEC), including our Annual Report on Form 10-K for the fiscal year ended March 31, 2023, which can be found at the SECʼs website at www.sec.gov. All forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by the foregoing cautionary statements. All such statements speak only as of the date made and, except as required by law, we undertake no obligation to update or revise publicly any forward-looking statements, whether as a result of new information, future events or otherwise. About Booz Allen Hamilton Trusted to transform missions with the power of tomorrow’s technologies, Booz Allen Hamilton advances the nation’s most critical civil, defense, and national security priorities. We lead, invest, and invent where it’s needed most—at the forefront of complex missions, using innovation to define the future. We combine our in-depth expertise in AI and cybersecurity with leading-edge technology and engineering practices to deliver impactful solutions. Combining more than 100 years of strategic consulting expertise with the perspectives of diverse talent, we ensure results by integrating technology with an enduring focus on our clients. We’re first to the future—moving missions forward to realize our purpose: Empower People to Change the World®. With global headquarters in McLean, Virginia, our firm employs approximately 33,100 people globally as of September 30, 2023 and had revenue of $9.3 billion for the 12 months ended March 31, 2023. To learn more, visit www.boozallen.com. (NYSE: BAH) Contacts Media Relations: Liam Davitt, Davitt_Liam@bah.com Investor Relations: Nathan P. Rutledge, Rutledge_Nathan@bah.com