CONTRACT WINS

Booz Allen Will Drive Innovation Supporting the IRS’s Public Service and Taxpayer Engagement Objectives MCLEAN, Va.–(BUSINESS WIRE)–Jun. 27, 2023– Booz Allen Hamilton (NYSE: BAH) today announced that it was awarded a position on the Internal Revenue Service (IRS) Enterprise Development, Operations Services (EDOS) contract, a Blanket Purchase Agreement (BPA) with a ceiling value of $2.6 billion. The multiple-award BPA has a seven-year period of performance. The IRS’s information technology teams work to deliver IT services and solutions that drive effective tax administration. The transformational EDOS contract supports IRS’ applications development portfolio to modernize mission critical applications efficiently and cost-effectively, while implementing annual tax season legislative requirements. EDOS is designed for task orders that will support the filing season and the agency’s legislatively mandated modernization goals. “EDOS is an exciting milestone in a period of transformation for the IRS to reimagine the taxpayer experience,” said Richard Crowe, Booz Allen’s Civil sector president. “We look forward to the opportunity to apply our decades of experience in powering data-enabled missions as we enhance the way the IRS serves the public by modernizing legacy systems, building up and leveraging data and analytics and delivering cutting-edge technology to operate more effectively.” With this contract, Booz Allen builds upon an established track record of more than 25 years as a strategic mission partner supporting the IRS. Booz Allen applies a deep understanding of the complexities of maintaining a portfolio of more than 400 systems and balancing tax filing season deadlines against decommissioning, consolidation, and re-platforming to reduce the agency’s legacy IT footprint, while building new systems to support the ever-changing demands of all citizens. “Meeting the demands of today’s digital citizen requires expertise in modernization, operations and maintenance with complex systems across the federal government,” said Paul Tartaglione, a senior vice president in Booz Allen’s Civil business. “Our deep mission understanding—coupled with our proven track record of applying artificial intelligence, machine learning and cybersecurity to federal missions—enables us to play a pivotal role in enhancing the functionality and efficiency of IRS’ systems. Booz Allen is committed to supporting IRS’ modernization and tax administration efforts for years to come.” Read more about how Booz Allen helps federal agencies modernize by acquiring, integrating, and scaling the platforms and technologies they need to power their most critical missions. About Booz Allen HamiltonTrusted 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 31,900 people globally as of March 31, 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 StatementsCertain statements contained in this press release include “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Examples of forward-looking statements include prospective performance and opportunities, as well as any other statement that does 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. Additional information concerning risks and uncertainties and other factors can be found in our filings with the Securities and Exchange Commission (the SEC), including in our Annual Report on Form 10-K filed with the SEC on May 26, 2023. 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. BAHPR-CW View source version on businesswire.com: https://www.businesswire.com/news/home/20230627315666/en/ Media Relations: Michael Keebler, Keebler_Michael@bah.comInvestor Relations: Nathan P. Rutledge, Rutledge_Nathan@bah.com Source: Booz Allen Hamilton Holding Corporation

Booz Allen Will Implement and Operate Thunderdome’s Zero Trust Network Access and Application Security Architecture MCLEAN, Va.–(BUSINESS WIRE)–Aug. 14, 2023– Booz Allen Hamilton (NYSE: BAH) today announced it was awarded a follow-on production other transaction authority (OTA) agreement for at-scale deployment of Thunderdome, the Defense Information Systems Agency’s (DISA) zero trust network access and application security architecture. The single-award contract has a one-year base period of performance, with four one-year option periods. Under this agreement, Booz Allen will help to move DISA, the Fourth Estate, and its mission partners toward a zero-trust architecture. Booz Allen will broadly implement and operate Thunderdome’s zero trust network access and application security architecture, which will harden Department of Defense (DoD) networks and help warfighters defend against adversarial activity by employing network and resource access tools along with segmentation technologies. DISA’s Thunderdome capabilities align with the Executive Order on Improving the Nation’s Cybersecurity and the DoD Zero Trust Strategy and Roadmap. “The at-scale production of Thunderdome will be a critical step toward moving DoD forward in its zero trust journey,” said Kelly Rozumalski, a senior vice president leading Booz Allen’s National Cyber defense business. “Our team successfully demonstrated the use of commercial technologies to help meet many of DoD’s zero trust implementation goals, and our internal zero trust investments helped accelerate our ability to bring innovative solutions to complex challenges. This agreement further establishes Booz Allen as the premier zero trust service provider to federal agencies.” This award follows Booz Allen’s successful delivery of the Thunderdome prototype earlier this year. In January 2022, DISA awarded an initial OTA agreement to Booz Allen for the execution of a Thunderdome prototype, a zero-trust security solution to modernize and strengthen DoD’s cybersecurity terrain. During the prototype phase, DISA successfully onboarded over 1,800 users to Thunderdome and implemented conditional access for remote and on-premise users. In addition, Booz Allen achieved an Authority to Operate (ATO) for Thunderdome on DISA’s unclassified and classified network. “At-scale adoption of Thunderdome is a huge step toward zero trust and, ultimately, mitigating malicious activity,” said Chris Pymm, DISA’s Thunderdome portfolio manager. “The success of the prototype proved that commercial-off-the-shelf technologies can be integrated effectively to accelerate zero trust within DoD. Not only did Thunderdome’s prototype improve security in evaluated operational use cases, it also added efficiency to pilot users across the DoD Information Network.” DISA’s Thunderdome prototype proved that commercial technologies, including Secure Access Service Edge (SASE), Software Defined-Wide Area Networks/Customer Edge Security Stack (CESS), and Application Security Stacks, can improve both security and network performance in an existing enterprise environment. Thunderdome is a set of technologies integrated with, but not dependent upon, each other. “We are proud of our partnership with DISA to successfully deliver the Thunderdome prototype,” said Imran Umar, a vice president spearheading Booz Allen’s zero trust practice. “The Thunderdome prototype was composed of innovative technologies to demonstrate, with real users, that they will work together to deliver the tenets of zero trust on both classified and unclassified networks. We look forward to our continued partnership with DISA to take this solution into full production.” Read more about Booz Allen’s National Cyber business and the firm’s deep commitment to modernizing defensive operations through zero-trust architecture. 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 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 press release include “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Examples of forward-looking statements include prospective performance and opportunities, as well as any other statement that does 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. Additional information concerning risks and uncertainties and other factors can be found in our filings with the Securities and Exchange Commission (the SEC), including in our Annual Report on Form 10-K filed with the SEC on May 26, 2023. 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. BAHPR-CW View source version on businesswire.com: https://www.businesswire.com/news/home/20230814059517/en/ Media Relations: Michael Keebler, Keebler_Michael@bah.comInvestor Relations: Nathan P. Rutledge, Rutledge_Nathan@bah.com Source: Booz Allen Hamilton Holding Corporation

MCLEAN, Va.–(BUSINESS WIRE)–Sep. 15, 2023– Booz Allen Hamilton Holding Corporation (NYSE: BAH), the parent company of management and technology consulting firm Booz Allen Hamilton, will host a conference call at 8 a.m. EDT on Friday, October 27, 2023, to discuss the financial results for the Second Quarter of Fiscal 2024 (ending September 30, 2023). A news release containing the results will be issued before the call. Analysts and institutional investors may participate by registering online at investors.boozallen.com. Participants are requested to register a minimum 15 minutes before the start of the call. The conference call will be webcast simultaneously to the public through a link on the investor relations section of the Booz Allen Hamilton website at investors.boozallen.com. A replay of the conference call will be available online at investors.boozallen.com beginning at 11 a.m. EDT on Friday, October 27, 2023, and continuing for 30 days. 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) BAHPR-FI View source version on businesswire.com: https://www.businesswire.com/news/home/20230915662478/en/ Media Relations – Jessica Klenk, 703-377-4296Investor Relations – Nathan P. Rutledge, 202-440-3943 Source: Booz Allen Hamilton Holding Corporation