NEW YORK--(BUSINESS WIRE)--Scott+Scott Attorneys at Law LLP is investigating whether certain directors and officers of GigCapital4, Inc. (“GigCapital4”) (NASDAQ: GIG); n/k/a BigBear.ai Holdings, Inc. (“BigBear”) (NYSE: BBAI) breached their fiduciary duties to GigCapital4's shareholders. If you were a GigCapital4 shareholder, you may contact attorney Joe Pettigrew for additional information toll-free at 844-818-6982, or [email protected].

COLUMBIA, Md. & PALO ALTO, Calif.--(BUSINESS WIRE)--BigBear.ai, a leading provider of artificial intelligence ("AI"), machine learning, cloud-based big data analytics, and cyber engineering solutions, and GigCapital4, Inc. (“GigCapital4”; Nasdaq: GIGGU, GIG, GIGGW), a Private-to-Public Equity (PPE)TM entity also known as special purpose acquisition company (“SPAC”), today announced the completion of their previously announced business combination (the “Business Combination”). The Business Combination was approved at a Special Meeting of GigCapital4's stockholders on December 3, 2021. Upon completion of the Business Combination, the combined company changed its name to BigBear.ai Holdings, Inc. (“BigBear.ai”). BigBear.ai’s shares of common stock and warrants are expected to commence trading on the NYSE on December 8, 2021 under the new ticker symbols “BBAI” and “BBAI.WS,” respectively. The transaction values BigBear.ai at a $1.378 billion pro forma enterprise value. Fueled by machine-driven analytics, BigBear.ai’s modular, end-to-end solutions transform raw data into knowledge, enabling enhanced decision-making in real-time. With well-established roots in the national security and defense space, BigBear.ai’s platform is battle-tested to perform in complex, real time environments, and its highly flexible solutions are highly applicable to the rapidly growing commercial market and state and local government sector. The Company is well positioned to leverage the significant growth opportunities in the global AI and machine learning (“ML”) market, which is projected to grow at a compound annual growth rate of approximately 40% to $310 billion by 20261. Dr. Reggie Brothers, Chief Executive Officer of BigBear.ai, said, “The completion of our business combination with GigCapital4 and emergence as a publicly-traded company is a landmark achievement for BigBear.ai, and one that we would not have reached without the hard work and focus of our dedicated employees and the support of our partners, GigCapital4 and AE Industrial Partners. We are in the early innings of unprecedented growth in the AI/ML landscape, and we believe our recent contract wins, which bring our total backlog to $485 million, are the tip of the iceberg. As a public company, we plan to build value for shareholders by continuing our strong momentum in the government and defense sectors and accelerating our penetration of targeted commercial markets like space, maritime, transportation & logistics, energy, retail and infrastructure.” Dr. Raluca Dinu, Founding Managing Partner of GigCapital Global and CEO of GigCapital4, said, “The GigCapital team is very proud to have closed our fourth business combination, GigCapital4 with BigBear.ai, our third closing in 2021. We stand committed to our mission of Mentor InvestorTM to guide brilliant teams like BigBear.ai as they navigate the journey of becoming a major public enterprise. We are pleased to continue to support BigBear.ai as part of its Board of Directors as the company enters its next phase of innovation and growth, and we believe it is very well positioned to address rapidly growing customer demand for solutions that augment the human decision-making process.” Dr. Avi Katz, Founding Managing Partner of GigCapital Global and Executive Chairman of the Board of GigCapital4, said, “We are excited about the partnership with AE Industrial Partners who entrusted BigBear.ai to partner with our team. This combination is yet again a successful demonstration of our Private-to-Public Equity (PPE)™ methodology where we partner with lead private equity owners on the next chapter in the high growth public company journey.” Kirk Konert, Partner at AE Industrial Partners, said, “BigBear.ai has a truly differentiated position and platform in the artificial intelligence market that is experiencing significant growth. As a public company, BigBear.ai has a strong capital base to invest in additional technology development, expand commercial R&D and business development teams, and accelerate growth – both organically and through acquisitions.” Jeff Hart, Principal at AE Industrial Partners, said, “BigBear.ai will enter the public domain with its unique and proven AI products and strong financial position bolstered by a robust contract backlog. As organizations become increasingly more complex in the amount of data they receive, BigBear.ai’s products will be a linchpin in distilling that data into insights that can be used to make better decisions. We are tremendously proud of BigBear.ai and excited to continue partnering with them on this incredible journey.” Advisors William Blair is serving as exclusive financial advisor, Kirkland and Ellis LLP is serving as legal counsel, and Grant Thornton is serving as auditor to BigBear.ai. Oppenheimer & Co Inc. is serving as Capital Markets Advisor and Placement Agent, and BMO Capital Markets is serving as Exclusive Financial Advisor, DLA Piper LLP (US) is serving as legal counsel, and BPM LLP is serving as auditors to GigCapital4. Mayer Brown LLP is serving as legal counsel to Oppenheimer & Co Inc., BMO Capital Markets and William Blair. About BigBear.ai A leader in decision dominance for more than 20 years, BigBear.ai operationalizes artificial intelligence and machine learning at scale through its end-to-end data analytics platform. The company uses its proprietary AI/ML technology to support its customers' decision-making processes and deliver practical solutions that work in complex, realistic, and imperfect data environments. In addition, BigBear.ai's composable AI-powered platform solutions work together as often as they stand alone: Observe (data ingestion and conflation), Orient (composable machine learning at scale), and Dominate (visual anticipatory intelligence and optimization). BigBear.ai's customers, which include the U.S. Intelligence Community, Department of Defense, the U.S. Federal Government, as well as customers in the commercial sector, rely on BigBear.ai's high-value software products and technology to analyze information, identify and manage risk, and support mission-critical decision making. Headquartered in Columbia, Maryland, BigBear.ai has additional locations in Virginia, Massachusetts, Michigan, and California. For more information, please visit: http://bigbear.ai/ and follow BigBear.ai on Twitter: @BigBearai. About GigCapital4 GigCapital4, Inc. is a Private-to-Public Equity (PPE)™ company, also known as a blank check company or special purpose acquisition company (SPAC), focusing on the technology, media and telecommunications (TMT) and sustainable industries. It was sponsored by GigAcquisitions4, LLC, which was founded by GigFounders, LLC, each a member entity of GigCapital Global, and formed for the purpose of entering into a merger, share exchange, asset acquisition, stock purchase, recapitalization, reorganization or similar business combination with one or more businesses. “Private-to-Public Equity (PPE)” and “Mentor Investor” are trademarks of GigFounders, LLC, an affiliate GigCapital4, and are used pursuant to agreement. About AE Industrial Partners AE Industrial Partners is a private equity firm specializing in Aerospace, Defense & Government Services, Space, Power & Utility Services, and Specialty Industrial markets. AE Industrial Partners invests in market-leading companies that can benefit from our deep industry knowledge, operating experience, and relationships throughout our target markets. AE Industrial Partners is a signatory to the United Nations Principles for Responsible Investment and the ILPA Diversity in Action initiative. Learn more at www.aeroequity.com. Forward-Looking Statements This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, including the business combination between GigCapital4 and BigBear.ai and the closing of those transactions, and statements regarding BigBear.ai’s management team’s expectations, hopes, beliefs, intentions, plans, prospects or strategies regarding the future, including possible business combinations, revenue growth and financial performance, product expansion and services. Any statements contained herein that are not statements of historical fact may be deemed to be forward-looking statements. In addition, any statements that refer to projections, forecasts or other characterizations of future events or circumstances, including any underlying assumptions, are forward-looking statements. The words “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “intends,” “may,” “might,” “plan,” “possible,” “potential,” “predict,” “project,” “should,” “would” and similar expressions may identify forward-looking statements, but the absence of these words does not mean that a statement is not forward-looking. The forward-looking statements contained in this press release are based on our current expectations and beliefs made by the management of GigCapital4 and BigBear.ai in light of their respective experience and their perception of historical trends, current conditions and expected future developments and their potential effects on BigBear.ai and GigCapital4 as well as other factors they believe are appropriate in the circumstances. There can be no assurance that future developments affecting BigBear.ai or GigCapital4 will be those that we have anticipated. These forward-looking statements involve a number of risks, uncertainties (some of which are beyond the control of the parties) or other assumptions that may cause actual results or performance to be materially different from those expressed or implied by these forward-looking statements, including regulatory approvals, the ability of the post-combination company to meet the NYSE listing standards, product and service acceptance, and that BigBear.ai will have sufficient capital to operate as anticipated. Should one or more of these risks or uncertainties materialize, or should any of our assumptions prove incorrect, actual results may vary in material respects from those projected in these forward-looking statements. Additional factors that could cause actual results to differ are discussed under the heading “Risk Factors” and in other sections of GigCapital4’s filings with the SEC, and in GigCapital4’s current and periodic reports filed or furnished from time to time with the SEC. All forward-looking statements in this press release are made as of the date hereof, based on information available to GigCapital4 and BigBear.ai as of the date hereof, and GigCapital4 and BigBear.ai assume no obligation to update any forward-looking statement, whether as a result of new information, future events or otherwise, except as may be required under applicable securities laws. _______________________ 1 MarketsAndMarkets, Inc., May, 2021

PALO ALTO, Calif. & COLUMBIA, Md.--(BUSINESS WIRE)---- $GIG--GigCapital4, Inc. (“GigCapital4”; Nasdaq: GIGGU, GIG, GIGGW), a private-to-public equity (PPE)TM entity also known as a special purpose acquisition company (“SPAC”), and BigBear.ai (“the Company”), a leading provider of artificial intelligence ("AI"), machine learning, cloud-based big data analytics, and cyber engineering solutions, today announced that at the Special Meeting of GigCapital4's stockholders (the “Special Meeting”) held today, Gi

PALO ALTO, Calif. & COLUMBIA, Md.--(BUSINESS WIRE)--GigCapital4, Inc. (“GigCapital4”; Nasdaq: GIGGU, GIG, GIGGW), a private-to-public equity (PPE)TM entity also known as a special purpose acquisition company (“SPAC”), and BigBear.ai (“the Company”), a leading provider of artificial intelligence ("AI"), machine learning, cloud-based big data analytics, and cyber engineering solutions, today announced that at the Special Meeting of GigCapital4's stockholders (the “Special Meeting”) held today, GigCapital4’s shareholders voted to approve the previously announced proposed business combination between GigCapital4 and BigBear.ai, as well as all other proposals related to the Business Combination. GigCapital4 plans to file the results of the Special Meeting, as tabulated by an independent inspector of elections, on Form 8-K with the Securities and Exchange Commission today. Based on today’s shareholder approval and subject to the satisfaction or waiver of certain other closing conditions as described in GigCapital4’s definitive proxy statement/prospectus, the Business Combination is expected to be consummated on or about December 7, 2021. Following the consummation of the Business Combination, the combined company will operate as BigBear.ai Holdings, Inc. and its shares of common stock and warrants are expected to trade on the New York Stock Exchange beginning on December 8, 2021 under the symbols “BBAI” and “BBAI.WS,” respectively. About BigBear.ai A leader in decision dominance for more than 20 years, BigBear.ai operationalizes artificial intelligence and machine learning at scale through its end-to-end data analytics platform. The company uses its proprietary AI/ML technology to support its customers' decision-making processes and deliver practical solutions that work in complex, realistic, and imperfect data environments. In addition, BigBear.ai's composable AI-powered platform solutions work together as often as they stand alone: Observe (data ingestion and conflation), Orient (composable machine learning at scale), and Dominate (visual anticipatory intelligence and optimization). BigBear.ai's customers, which include the U.S. Intelligence Community, Department of Defense, the U.S. Federal Government, as well as customers in the commercial sector, rely on BigBear.ai's high-value software products and technology to analyze information, identify and manage risk, and support mission-critical decision making. Headquartered in Columbia, Maryland, BigBear.ai has additional locations in Virginia, Massachusetts, Michigan, and California. For more information, please visit: http://bigbear.ai/ and follow BigBear.ai on Twitter: @BigBearai. About GigCapital4 GigCapital4, Inc. is a Private-to-Public Equity (PPE)™ company, also known as a blank check company or special purpose acquisition company (SPAC), focusing on the technology, media and telecommunications (TMT) and sustainable industries. It was sponsored by GigAcquisitions4, LLC, which was founded by GigFounders, LLC, each a member entity of GigCapital Global, and formed for the purpose of entering into a merger, share exchange, asset acquisition, stock purchase, recapitalization, reorganization or similar business combination with one or more businesses. “Private-to-Public Equity (PPE)” is a trademark of GigFounders, LLC, an affiliate GigCapital4, and is used pursuant to agreement. Forward-Looking Statements This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, including the business combination between GigCapital4 and the Company and the closing of those transactions, and statements regarding our management team’s expectations, hopes, beliefs, intentions, plans, prospects or strategies regarding the future, including possible business combinations, revenue growth and financial performance, product expansion and services. Any statements contained herein that are not statements of historical fact may be deemed to be forward-looking statements. In addition, any statements that refer to projections, forecasts or other characterizations of future events or circumstances, including any underlying assumptions, are forward-looking statements. The words “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “intends,” “may,” “might,” “plan,” “possible,” “potential,” “predict,” “project,” “should,” “would” and similar expressions may identify forward-looking statements, but the absence of these words does not mean that a statement is not forward-looking. The forward-looking statements contained in this press release are based on our current expectations and beliefs made by the management of GigCapital4 and the Company in light of their respective experience and their perception of historical trends, current conditions and expected future developments and their potential effects on the Company and GigCapital4 as well as other factors they believe are appropriate in the circumstances. There can be no assurance that future developments affecting the Company or GigCapital4 will be those that we have anticipated. These forward-looking statements involve a number of risks, uncertainties (some of which are beyond the control of the parties) or other assumptions that may cause actual results or performance to be materially different from those expressed or implied by these forward-looking statements, including regulatory approvals, the ability of the post-combination company to meet the NYSE listing standards, product and service acceptance, and that the Company will have sufficient capital to operate as anticipated. Should one or more of these risks or uncertainties materialize, or should any of our assumptions prove incorrect, actual results may vary in material respects from those projected in these forward-looking statements. Additional factors that could cause actual results to differ are discussed under the heading “Risk Factors” and in other sections of GigCapital4’s filings with the SEC, and in GigCapital4’s current and periodic reports filed or furnished from time to time with the SEC. All forward-looking statements in this press release are made as of the date hereof, based on information available to GigCapital4 and the Company as of the date hereof, and GigCapital4 and the Company assume no obligation to update any forward-looking statement, whether as a result of new information, future events or otherwise, except as may be required under applicable securities laws.

COLUMBIA, Md. & PALO ALTO, Calif.--(BUSINESS WIRE)--BigBear.ai (“the Company"), a leading provider of artificial intelligence, machine learning, cloud-based big data analytics, and cyber engineering solutions, and GigCapital4, Inc. (“GigCapital4”; Nasdaq: GIGGU, GIG, GIGGW), a Private-to-Public Equity (PPE)TM entity also known as special purpose acquisition company (“SPAC”), today announced that GigCapital4 has entered into a $75 million backstop agreement (7.5 million shares at $10 per share) with AE Industrial Partners to support their previously announced business combination. The backstop agreement provides that an affiliate of AE Industrial Partners will purchase up to 7.5 million shares of GigCapital stock, with the actual amount dependent upon the amount of cash available at the closing of the business combination of the Company and GigCapital4 after any redemptions, the repayment of existing Company debt, transaction expenses and the cash portion of the merger consideration being paid in the business combination. In addition, GigCapital4 and the Company have adjusted the rollover equity of BigBear.ai by 15% to $1.05 billion to reflect current market conditions and establish a more attractive entry point to market. Additionally, they have set as a condition to GigCapital4 closing that there be a minimum available cash at closing of $75 million on the balance sheet of the post-combination Company. BigBear.ai believes that its recent strategic progress and new contract awards support substantial value opportunities for stockholders: Reported third quarter 2021 revenue of $40.2 million, an increase of approximately 11% over the second quarter of 2021, driven by new and expanded customer engagements. Added more than $150 million of new contract awards in the third quarter, growing total backlog to approximately $485 million as of September 30, 2021. New engagements and contract awards include: new commercial partnership with Palantir to collaborate on go-to-market opportunities in the commercial market sector; commercial partnerships with Virgin Orbit and Terran Orbital; MOU with Redwire Corporation; one-year contract with the Defense Intelligence Agency; new award by the United States Army for Global Force Information Management Phase 1 Prototype contract; five-year, single award contract by the National Security Agency (NSA). Targeted investments aimed at accelerating commercial penetration, including strategic leadership appointments to support the Company’s growth. “We believe our suite of AI-powered solutions are indispensable tools that give government and commercial sector clients critical competitive advantages – allowing them to make decisions faster and better than their competitors,” said Dr. Reggie Brothers, Chief Executive Officer of BigBear.ai. “Along with our partners at GigCapital4 and AE Industrial and the purchasers of our convertible senior unsecured notes, we are confident in our opportunities to create value as a public company. We are well positioned to accelerate our progress and take advantage of a rapidly growing addressable market, and today’s announcement reflects our commitment to delivering significant value for GigCapital4 shareholders as well as future shareholders of BigBear.ai.” Dr. Raluca Dinu, Founding Managing Partner of GigCapital Global and Chief Executive Officer of GigCapital4, said, “With consistent backlog growth and major contract awards, BigBear.ai is generating strong momentum and has multiple paths for growth as it continues to expand into the fast-growing commercial market. We believe that AI is one of the highest-impact technology verticals of our generation, and we are confident that this transaction brings compelling opportunities to all stakeholders.” Kirk Konert, Partner at AE Industrial Partners, said, “AE Industrial Partners is proud to further support this transaction through the backstop agreement, and believes BigBear.ai is well positioned to leverage the significant opportunities to operationalize its AI platform and create value for shareholders as a public company.” Dr. Avi Katz, Founding Managing Partner of GigCapital Global and Executive Chairman of the Board of GigCapital4, said, “The GigCapital team is delighted to combine with a world leading AI/ML company, as BigBear.ai, and with AE Industrial Partners being lead investors in the aerospace and defense space, as we will jointly work together as part of the future public company board of directors to enhance the future growth of the enterprise. We are also humbled by the exceptional partnership we found with our investors supporting this deal in unlocking significant value for all stakeholders in the ecosystem.” Transaction Details In addition to the backstop agreement described above, and in order to reflect current market conditions and establish a more attractive entry point to market, the change in the rollover equity agreed to by GigCapital4 and the Company results in an adjustment of the post-combination pro forma enterprise value of BigBear.ai from $1.565 billion to $1.378 billion. As previously announced, the Company is expected to have approximately $330 million in cash at transaction close, post all debt repayments and payment of transaction expenses, which the Company believes will provide the flexibility to support organic and inorganic growth. The cash component of the purchase price to be paid to the equity holders of BigBear.ai is expected to be funded by GigCapital4's cash in trust (minus any redemptions by public stockholders), and a $200 million convertible senior unsecured note private placement with institutional investors including funds managed by affiliates of Fortress Investment Group, LLC, Marathon Asset Management, LP, and certain funds managed by Highbridge Capital Management, LLC. The 5-year unsecured convertible notes, which shall bear interest at a rate of 6% per annum, are convertible into common shares of the combined company at a conversion price of $11.50, and are being revised in conjunction with the entry into the backstop agreement and the change in rollover equity to provide certain covenants and other protections to the note holders, including restrictions on additional borrowing by the post-combination Company, subject to certain exceptions, and a one-time conversion price reset, if required for down‑side protection. GigCapital4 Special Meeting of Stockholders The special meeting of GigCapital4 stockholders to approve the proposed business combination (the “Special Meeting”) will be held at 1 p.m. Eastern Time/10 a.m. Pacific Time on December 3, 2021. The proxy statement/prospectus is being mailed to the Company's stockholders of record as of the close of business on October 5, 2021 (the "Record Date"). Upon closing of the transaction, BigBear.ai’s common shares and warrants are expected to trade on the New York Stock Exchange under the ticker symbols "BBAI" and “BBAI.WS,” respectively. The transaction is expected to close on December 7, 2021, subject to approval by GigCapital4 stockholders. Advisors William Blair is serving as exclusive financial advisor, Kirkland and Ellis LLP is serving as legal counsel, and Grant Thornton is serving as auditor to BigBear.ai. Oppenheimer & Co Inc. is serving as Capital Markets Advisor and Placement Agent, and BMO Capital Markets is serving as Exclusive Financial Advisor, DLA Piper LLP (US) is serving as legal counsel, and BPM LLP is serving as auditors to GigCapital4. Mayer Brown LLP is serving as legal counsel to Oppenheimer & Co Inc., BMO Capital Markets and William Blair. About BigBear.ai A leader in decision dominance for more than 20 years, BigBear.ai operationalizes artificial intelligence and machine learning at scale through its end-to-end data analytics platform. The Company uses its proprietary AI/ML technology to support its customers’ decision-making processes and deliver practical solutions that work in complex, realistic and imperfect data environments. BigBear.ai’s composable AI-powered platform solutions work together as often as they stand alone: Observe (data ingestion and conflation), Orient (composable machine learning at scale), and Dominate (visual anticipatory intelligence and optimization). BigBear.ai’s customers, which include the U.S. Intelligence Community, Department of Defense, the U.S. Federal Government, as well as customers in the commercial sector, rely on BigBear.ai’s high value software products and technology to analyze information, identify and manage risk, and support mission critical decision making. Headquartered in Columbia, Maryland, BigBear.ai has additional locations in Virginia, Massachusetts, Michigan, and California. For more information, please visit: http://bigbear.ai/ and follow BigBear.ai on Twitter: @BigBearai. About GigCapital4 GigCapital4, Inc. is a Private-to-Public Equity (PPE)™ company, also known as a blank check company or special purpose acquisition company (SPAC), focusing on the technology, media and telecommunications (TMT) and sustainable industries. It was sponsored by GigAcquisitions4, LLC, which was founded by GigFounders, LLC, each a member entity of GigCapital Global, and formed for the purpose of entering into a merger, share exchange, asset acquisition, stock purchase, recapitalization, reorganization or similar business combination with one or more businesses. “Private-to-Public Equity (PPE)” is a trademark of GigFounders, LLC, an affiliate GigCapital4, and is used pursuant to agreement. About AE Industrial Partners AE Industrial Partners is a private equity firm specializing in Aerospace, Defense & Government Services, Space, Power & Utility Services, and Specialty Industrial markets. AE Industrial Partners invests in market-leading companies that can benefit from our deep industry knowledge, operating experience, and relationships throughout our target markets. AE Industrial Partners is a signatory to the United Nations Principles for Responsible Investment and the ILPA Diversity in Action initiative. Learn more at www.aeroequity.com. Participants in Solicitation BigBear.ai, GigCapital4 and their respective directors and executive officers and other persons may be deemed to be participants in the solicitations of proxies from GigCapital4’s stockholders in respect of the proposed business combination and related transactions. Information regarding GigCapital4’s directors and executive officers is available in its final prospectus prepared and filed with the SEC on February 10, 2021 under Rule 424(b)(4) promulgated by the SEC pursuant to the Securities Act of 1933, as amended (the “Securities Act”) and related to its previously filed Registration Statement on Form S-1. Additional information regarding the participants in the proxy solicitation and a description of their direct and indirect interests is contained in the definitive proxy statement related to the proposed business combination and related transactions, and which can be obtained free of charge from the sources indicated above. Additional Information and Where to Find It In connection with the proposed business combination, GigCapital4 has filed with the Securities and Exchange Commission (the “SEC”) a definitive proxy statement under the rules of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and has subsequently mailed a definitive proxy statement relating to the proposed business combination to its stockholders. This press release does not contain all the information that should be considered concerning the proposed business combination and is not intended to form the basis of any investment decision or any other decision in respect of the business combination. Additional information about the proposed business combination and related transactions is described in GigCapital4’s proxy statement relating to the proposed business combination and the respective businesses of GigCapital4 and BigBear.ai. The proposed business combination and related transactions will be submitted to stockholders of GigCapital4 for their consideration. GigCapital4’s stockholders and other interested persons are advised to read the definitive proxy statement and other documents filed in connection with GigCapital4’s solicitation of proxies for its special meeting of stockholders to be held to approve, among other things, the proposed business combination and related transactions, because these materials will contain important information about BigBear.ai, GigCapital4 and the proposed business combination and related transactions. The definitive proxy statement and other relevant materials for the proposed business combination has been mailed to stockholders of GigCapital4 as of October 5, 2021, which has been established as the record date for voting on the proposed business combinations and related transactions. Stockholders may also obtain a copy of the definitive proxy statement, as well as other documents filed with the SEC by GigCapital4, without charge, at the SEC’s website located at www.sec.gov or by directing a request to Brad Weightman, Vice President and Chief Financial Officer, GigCapital4, Inc., 1731 Embarcadero Rd., Suite 200, Palo Alto, CA 94303, or by telephone at (650) 276-7040. Forward-Looking Statements This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act, and Section 21E of the Exchange Act. Forward-looking statements may be identified by the use of words such as “estimate,” “plan,” “project,” “forecast,” “intend,” “will,” “expect,” “anticipate,” “believe,” “seek,” “target” or other similar expressions that predict or indicate future events or trends or that are not statements of historical matters. These forward-looking statements include, but are not limited to, statements regarding estimates and forecasts of other financial and performance metrics, projections of market opportunity and market share, and the timing of the consummation of the business combination. These statements are based on various assumptions, whether or not identified in this press release, and on the current expectations of management of GigCapital4 and are not predictions of actual performance. These forward-looking statements are provided for illustrative purposes only and are not intended to serve as, and must not be relied on by any investor as, a guarantee, an assurance, a prediction or a definitive statement of fact or probability. Actual events and circumstances are difficult or impossible to predict and will differ from assumptions. Many actual events and circumstances are beyond the control of GigCapital4. These forward-looking statements are subject to a number of risks and uncertainties, including changes in domestic and foreign business, market, financial, political, and legal conditions; the inability of the parties to successfully or timely consummate the proposed business combination, including the risk that any required regulatory approvals are not obtained, are delayed or are subject to unanticipated conditions that could adversely affect the combined company or the expected benefits of the proposed business combination or that the approval of stockholders is not obtained; failure to realize the anticipated benefits of the proposed business combination; risks relating to the uncertainty of the projected financial information with respect to BigBear.ai; risks related to the rollout of BigBear.ai's business and the timing of expected business milestones; the effects of competition on BigBear.ai's future business; the amount of redemption requests made by GigCapital4's public stockholders; the ability of GigCapital4 or the combined company to issue equity or equity-linked securities in connection with the proposed business combination or in the future. If any of these risks materialize or GigCapital4’s assumptions prove incorrect, actual results could differ materially from the results implied by these forward-looking statements. Additional factors that could cause actual results to differ are discussed under the heading “Risk Factors” and in other sections of GigCapital4’s filings with the SEC, and in GigCapital4’s current and periodic reports filed or furnished from time to time with the SEC. There may be additional risks that neither GigCapital4 nor BigBear.ai presently know or that they currently believe are immaterial that could also cause actual results to differ from those contained in the forward-looking statements. In addition, forward-looking statements reflect GigCapital4 and BigBear.ai’s expectations, plans or forecasts of future events and views as of the date of this press release, based on information available to GigCapital4 and BigBear.ai as of the date hereof. GigCapital4 and BigBear.ai assume no obligation to update any forward-looking statement, whether as a result of new information, future events or otherwise, except as may be required under applicable securities laws. While GigCapital4 and BigBear.ai may elect to update these forward-looking statements at some point in the future, GigCapital4 and BigBear.ai specifically disclaim any obligation to do so. These forward-looking statements should not be relied upon as representing GigCapital4's and BigBear.ai's assessments as of any date subsequent to the date of this press release. Accordingly, undue reliance should not be placed upon the forward-looking statements.

PALO ALTO, Calif.--(BUSINESS WIRE)--GigCapital4, Inc. (the “GigCapital4” or the “Company”), a special purpose acquisition company, today reminded stockholders to vote “FOR” the business combination with BigBear.ai Holdings, LLC (“BigBear.ai”) at the special meeting of stockholders scheduled for December 3, 2021 (the “Special Meeting”). The Company also noted the pending transfer of the listing of its common stock, par value $0.0001 per share (the “Common Stock”) and it’s warrants to purchase Common Stock at an exercise price of $11.50 per whole share (the “Warrants”), from the Nasdaq Capital Market (“Nasdaq”) to the New York Stock Exchange (the “NYSE”) in connection with the anticipated closing of the business combination. Trading of the Common Stock and the Warrants is expected to begin on the NYSE on December 8, 2021 under the new ticker symbol “BBAI” and “BBAIW”. The last day of trading on the Nasdaq is expected to be on December 7, 2021, following the consummation of the Company’s pending business combination transaction with BigBear.ai, which is currently expected to occur on December 7, 2021, subject to final stockholder approval at the Special Meeting and satisfaction of other customary closing conditions. As previously announced, the Company will hold the Special Meeting exclusively via live webcast on December 3, 2021, at 10:00 a.m., Pacific Standard Time (PST) at www.virtualshareholdermeeting.com/GIG2021SM, or at such other date, time and place to which such meeting may be adjourned or postponed, to consider and vote upon the proposals. The Special Meeting will be conducted exclusively via live webcast and so stockholders will not be able to attend the meeting in person. Stockholders may attend the Special Meeting online and vote at the Special Meeting by visiting www.virtualshareholdermeeting.com/GIG2021SM and entering the 16-digit control number, which is either included on the proxy card you received or obtained through Broadridge Financial Solutions. If you have any questions, please contact Morrow Sodali LLC, the Company’s proxy solicitor, at (800) 662-5200 for individuals and at (203) 658-9400 for banks and brokers, or by email at [email protected]. No action is required by existing Company stockholders with respect to the ticker symbol or exchange listing change. About GigCapital4, Inc. GigCapital4, Inc. is a Private-to-Public Equity (PPE)™ company, also known as a blank check company or special purpose acquisition company (SPAC), focusing on the technology, media and telecommunications (TMT) and sustainable industries. It was sponsored by GigAcquisitions4, LLC, which was founded by GigFounders, LLC, each a member entity of GigCapital Global, and formed for the purpose of entering into a merger, share exchange, asset acquisition, stock purchase, recapitalization, reorganization or similar business combination with one or more businesses. “Private-to-Public Equity (PPE)” is a trademark of GigFounders, LLC, an affiliate GigCapital4, and is used pursuant to agreement. About BigBear.ai A leader in decision dominance for more than 20 years, BigBear.ai operationalizes artificial intelligence and machine learning at scale through its end-to-end data analytics platform. The Company uses its proprietary AI/ML technology to support its customers’ decision-making processes and deliver practical solutions that work in complex, realistic and imperfect data environments. BigBear.ai’s composable AI-powered platform solutions work together as often as they stand alone: Observe (data ingestion and conflation), Orient (composable machine learning at scale), and Dominate (visual anticipatory intelligence and optimization). BigBear.ai’s customers, which include the U.S. Intelligence Community, Department of Defense, the U.S. Federal Government, as well as customers in the commercial sector, rely on BigBear.ai’s high value software products and technology to analyze information, identify and manage risk, and support mission critical decision making. Headquartered in Columbia, Maryland, BigBear.ai has additional locations in Virginia, Massachusetts, Michigan, and California. For more information, please visit: http://bigbear.ai/ and follow BigBear.ai on Twitter: @BigBearai. Participants in Solicitation BigBear.ai, GigCapital4 and their respective directors and executive officers and other persons may be deemed to be participants in the solicitations of proxies from GigCapital4’s stockholders in respect of the proposed business combination and related transactions. Information regarding GigCapital4’s directors and executive officers is available in its final prospectus prepared and filed with the SEC on February 10, 2021 under Rule 424(b)(4) promulgated by the SEC pursuant to the Securities Act of 1933, as amended (the “Securities Act”) and related to its previously filed Registration Statement on Form S-1. Additional information regarding the participants in the proxy solicitation and a description of their direct and indirect interests is contained in the definitive proxy statement related to the proposed business combination and related transactions, and which can be obtained free of charge from the sources indicated above. Additional Information and Where to Find It In connection with the proposed business combination, GigCapital4 has filed with the Securities and Exchange Commission (the “SEC”) a definitive proxy statement under the rules of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and has subsequently mailed the definitive proxy statement relating to the proposed business combination to its stockholders. This press release does not contain all the information that should be considered concerning the proposed business combination and is not intended to form the basis of any investment decision or any other decision in respect of the business combination. Additional information about the proposed business combination and related transactions is described in GigCapital4’s proxy statement relating to the proposed business combination and the respective businesses of GigCapital4 and BigBear.ai. The proposed business combination and related transactions will be submitted to stockholders of GigCapital4 for their consideration. GigCapital4’s stockholders and other interested persons are advised to read the definitive proxy statement and other documents filed in connection with GigCapital4’s solicitation of proxies for its special meeting of stockholders to be held to approve, among other things, the proposed business combination and related transactions, because these materials will contain important information about BigBear.ai, GigCapital4 and the proposed business combination and related transactions. The definitive proxy statement and other relevant materials for the proposed business combination has been mailed to stockholders of GigCapital4 as of October 5, 2021, which has been established as the record date for voting on the proposed business combinations and related transactions. Stockholders may also obtain a copy of the definitive proxy statement, as well as other documents filed with the SEC by GigCapital4, without charge, at the SEC’s website located at www.sec.gov or by directing a request to Brad Weightman, Vice President and Chief Financial Officer, GigCapital4, Inc., 1731 Embarcadero Rd., Suite 200, Palo Alto, CA 94303, or by telephone at (650) 276-7040. Forward-Looking Statements This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act, and Section 21E of the Exchange Act. Forward-looking statements may be identified by the use of words such as “estimate,” “plan,” “project,” “forecast,” “intend,” “will,” “expect,” “anticipate,” “believe,” “seek,” “target” or other similar expressions that predict or indicate future events or trends or that are not statements of historical matters. These forward-looking statements include, but are not limited to, statements regarding estimates and forecasts of other financial and performance metrics, projections of market opportunity and market share, and the timing of the consummation of the business combination. These statements are based on various assumptions, whether or not identified in this press release, and on the current expectations of management of GigCapital4 and are not predictions of actual performance. These forward-looking statements are provided for illustrative purposes only and are not intended to serve as, and must not be relied on by any investor as, a guarantee, an assurance, a prediction or a definitive statement of fact or probability. Actual events and circumstances are difficult or impossible to predict and will differ from assumptions. Many actual events and circumstances are beyond the control of GigCapital4. These forward-looking statements are subject to a number of risks and uncertainties, including changes in domestic and foreign business, market, financial, political, and legal conditions; the inability of the parties to successfully or timely consummate the proposed business combination, including the risk that any required regulatory approvals are not obtained, are delayed or are subject to unanticipated conditions that could adversely affect the combined company or the expected benefits of the proposed business combination or that the approval of stockholders is not obtained; failure to realize the anticipated benefits of the proposed business combination; risks relating to the uncertainty of the projected financial information with respect to BigBear.ai; risks related to the rollout of BigBear.ai's business and the timing of expected business milestones; the effects of competition on BigBear.ai's future business; the amount of redemption requests made by GigCapital4's public stockholders; the ability of GigCapital4 or the combined company to issue equity or equity-linked securities in connection with the proposed business combination or in the future. If any of these risks materialize or GigCapital4’s assumptions prove incorrect, actual results could differ materially from the results implied by these forward-looking statements. Additional factors that could cause actual results to differ are discussed under the heading “Risk Factors” and in other sections of GigCapital4’s filings with the SEC, and in GigCapital4’s current and periodic reports filed or furnished from time to time with the SEC. There may be additional risks that neither GigCapital4 nor BigBear.ai presently know or that they currently believe are immaterial that could also cause actual results to differ from those contained in the forward-looking statements. In addition, forward-looking statements reflect GigCapital4 and BigBear.ai’s expectations, plans or forecasts of future events and views as of the date of this press release, based on information available to GigCapital4 and BigBear.ai as of the date hereof. GigCapital4 and BigBear.ai assume no obligation to update any forward-looking statement, whether as a result of new information, future events or otherwise, except as may be required under applicable securities laws. While GigCapital4 and BigBear.ai may elect to update these forward-looking statements at some point in the future, GigCapital4 and BigBear.ai specifically disclaim any obligation to do so. These forward-looking statements should not be relied upon as representing GigCapital4's and BigBear.ai's assessments as of any date subsequent to the date of this press release. Accordingly, undue reliance should not be placed upon the forward-looking statements.

PALO ALTO, Calif.--(BUSINESS WIRE)---- $GIG--GigCapital4, Inc. (the “GigCapital4” or the “Company”), a special purpose acquisition company, today reminded stockholders to vote “FOR” the business combination with BigBear.ai Holdings, LLC (“BigBear.ai”) at the special meeting of stockholders scheduled for December 3, 2021 (the “Special Meeting”). The Company also noted the pending transfer of the listing of its common stock, par value $0.0001 per share (the “Common Stock”) and it's warrants to purchase Co

COLUMBIA, Md. & PALO ALTO, Calif.--(BUSINESS WIRE)--GigCapital4, Inc. (“GigCapital4”; Nasdaq: GIGGU, GIG, GIGGW), a private-to-public equity (PPE)™ entity also known as special purpose acquisition company (“SPAC”), announced today that it has filed on November 5 its definitive proxy statement/prospectus with the U.S. Securities and Exchange Commission ("SEC") in connection with GigCapital4’s Special Meeting of Stockholders relating to the previously announced business combination (the “Business Combination”) with BigBear.ai, a leading provider of artificial intelligence (“AI”), machine learning, cloud-based big data analytics, and cyber engineering solutions. The Special Meeting of GigCapital4's stockholders will be held at 1 p.m. Eastern Time/10 a.m. Pacific Time on December 3, 2021 in connection with the Business Combination. The proxy statement/prospectus is being mailed to the Company's stockholders of record as of the close of business on October 5, 2021 (the "Record Date"). Upon closing of the transaction, the combined company will be named BigBear.ai, Inc. and its shares of common stock and warrants are expected to trade on the New York Stock Exchange under the symbols "BBAI" and “BBAIW,” respectively. BigBear.ai’s suite of AI-powered technology transforms complex, raw data into knowledge to optimize human decision making. Its end-to-end software and technology operationalizes artificial intelligence and machine learning (“AI/ML”) at scale, and integrates easily into public and private sector customers’ existing technology. Dr. Raluca Dinu, Founding Managing Partner of GigCapital Global and CEO of GigCapital4, said, “BigBear.ai provides a unique platform of advanced AI and machine learning capabilities at a critical period of growth in the AI/ML market. With a strong financial position, deep network of relationships and talented management team, BigBear.ai is well positioned to capitalize on opportunities in the commercial and defense sectors. We look forward to continuing our collaboration with BigBear.ai on the path to completing the business combination.” Dr. Reggie Brothers, Chief Executive Officer of BigBear.ai, said, “We are pleased to reach this milestone and take the next step on the path toward becoming a public company. This transaction will allow us to accelerate our growth plans and leverage the massive opportunity in the fast-growing AI/ML addressable market. Across the public and commercial sectors, organizations are overwhelmed by an immense volume of data, and that data is accumulating at an accelerated pace. BigBear.ai operationalizes AI to cut through the noise and help customers get to a better outcome. With over 20 years of experience using data analytics to help our customers improve their competitive positioning by making better and faster decisions, we are excited to expand our capabilities and bring our expertise to more customers across the public and commercial markets.” Jeffrey Hart, Principal at AE Industrial Partners, said, “BigBear.ai has been trusted by its diverse base of government and defense customers to support mission-critical decision making for years, and the company is now positioned to bring that expertise to an expanding market of commercial and state and local government customers. This transaction provides the resources to make this vision a reality by funding investments in sales and marketing, R&D and targeted M&A.” Kirk Konert, Partner at AE Industrial Partners, said, “AE Industrial is proud to have supported BigBear.ai’s journey to become a leading AI public company since its founding and looks forward to being part of its continued success. As the major shareholder, AE Industrial is excited about the growth and long-term stability of this company. I am also thrilled to continue to serve as a board member of the company and help leverage AE’s strategic expertise to further BigBear.ai’s future success.” As previously announced, the transaction values BigBear.ai at a pro forma enterprise value of approximately $1.57 billion, implying an EV / FY2022E multiple of 5.6x. Assuming no redemptions by GigCapital4 public stockholders, the Company is expected to have approximately $330 million in cash upon closing of the transaction, providing the capital flexibility needed to support organic and inorganic growth. The cash component of the purchase price to be paid to the equity holders of BigBear.ai is expected to be funded by GigCapital4's cash in trust (minus any redemptions by public stockholders), and a $200 million convertible senior unsecured note private placement with institutional investors including Fortress, Marathon, and Highbridge. The 5-year unsecured convertible notes, which shall bear interest at a rate of 6% per annum, are convertible into common shares of the combined company at a conversion price of $11.50. Virtual Meeting Information The GigCapital4 Special Meeting of Stockholders can be accessed by visiting www.virtualshareholdermeeting.com/GIG2021SM, where GigCapital4 stockholders will be able to listen to the meeting, submit questions and vote online. GigCapital4 encourages its stockholders to read the entire final proxy statement/prospectus, including the Annexes and other documents referred to therein, carefully and in their entirety. Holders of GigCapital4 stock who need assistance voting or have questions regarding the Extraordinary General Meeting may contact GigCapital4’s proxy solicitor, Morrow Sodali, at (203) 658-9400 or email at [email protected]. Advisor William Blair is serving as exclusive financial advisor, Kirkland and Ellis LLP is serving as legal counsel, and Grant Thornton is serving as auditor to BigBear.ai. Oppenheimer & Co Inc. is serving as Capital Markets Advisor and Placement Agent, and BMO Capital Markets is serving as Exclusive Financial Advisor, DLA Piper LLP (US) is serving as legal counsel, and BPM LLP is serving as auditors to GigCapital4. Mayer Brown LLP is serving as legal counsel to Oppenheimer & Co Inc., BMO Capital Markets and William Blair. About BigBear.ai A leader in decision dominance for more than 20 years, BigBear.ai operationalizes artificial intelligence and machine learning at scale through its end-to-end data analytics platform. The Company uses its proprietary AI/ML technology to support its customers’ decision-making processes and deliver practical solutions that work in complex, realistic and imperfect data environments. BigBear.ai’s composable AI-powered platform solutions work together as often as they stand alone: Observe (data ingestion and conflation), Orient (composable machine learning at scale), and Dominate (visual anticipatory intelligence and optimization). BigBear.ai’s customers, which include the U.S. Intelligence Community, Department of Defense, the U.S. Federal Government, as well as customers in the commercial sector, rely on BigBear.ai’s high value software products and technology to analyze information, identify and manage risk, and support mission critical decision making. Headquartered in Columbia, Maryland, BigBear.ai has additional locations in Virginia, Massachusetts, Michigan, and California. For more information, please visit: http://bigbear.ai/ and follow BigBear.ai on Twitter: @BigBearai. About GigCapital4 GigCapital4, Inc. is a Private-to-Public Equity (PPE)™ company, also known as a blank check company or special purpose acquisition company (SPAC), focusing on the technology, media and telecommunications (TMT) and sustainable industries. It was sponsored by GigAcquisitions4, LLC, which was founded by GigFounders, LLC, each a member entity of GigCapital Global, and formed for the purpose of entering into a merger, share exchange, asset acquisition, stock purchase, recapitalization, reorganization or similar business combination with one or more businesses. “Private-to-Public Equity (PPE)” is a trademark of GigFounders, LLC, an affiliate GigCapital4, and is used pursuant to agreement. Participants in Solicitation BigBear.ai, GigCapital4 and their respective directors and executive officers and other persons may be deemed to be participants in the solicitations of proxies from GigCapital4’s stockholders in respect of the proposed business combination and related transactions. Information regarding GigCapital4’s directors and executive officers is available in its final prospectus prepared and filed with the SEC on February 10, 2021 under Rule 424(b)(4) promulgated by the SEC pursuant to the Securities Act of 1933, as amended (the “Securities Act”) and related to its previously filed Registration Statement on Form S-1. Additional information regarding the participants in the proxy solicitation and a description of their direct and indirect interests is contained in the definitive proxy statement related to the proposed business combination and related transactions, and which can be obtained free of charge from the sources indicated above. Additional Information and Where to Find It In connection with the proposed business combination, GigCapital4 has filed with the Securities and Exchange Commission (the “SEC”) a definitive proxy statement under the rules of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). GigCapital4 will subsequently mail a definitive proxy statement relating to the proposed business combination to its stockholders. This press release does not contain all the information that should be considered concerning the proposed business combination and is not intended to form the basis of any investment decision or any other decision in respect of the business combination. Additional information about the proposed business combination and related transactions will be described in GigCapital4’s proxy statement relating to the proposed business combination and the respective businesses of GigCapital4 and BigBear.ai. The proposed business combination and related transactions will be submitted to stockholders of GigCapital4 for their consideration. GigCapital4’s stockholders and other interested persons are advised to read the definitive proxy statement and other documents filed in connection with GigCapital4’s solicitation of proxies for its special meeting of stockholders to be held to approve, among other things, the proposed business combination and related transactions, because these materials will contain important information about BigBear.ai, GigCapital4 and the proposed business combination and related transactions. The definitive proxy statement and other relevant materials for the proposed business combination will be mailed to stockholders of GigCapital4 as of October 5, 2021, which has been established as the record date for voting on the proposed business combinations and related transactions. Stockholders may also obtain a copy of the definitive proxy statement, as well as other documents filed with the SEC by GigCapital4, without charge, at the SEC’s website located at www.sec.gov or by directing a request to Brad Weightman, Vice President and Chief Financial Officer, GigCapital4, Inc., 1731 Embarcadero Rd., Suite 200, Palo Alto, CA 94303, or by telephone at (650) 276-7040. Forward-Looking Statements This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act, and Section 21E of the Exchange Act. Forward-looking statements may be identified by the use of words such as “estimate,” “plan,” “project,” “forecast,” “intend,” “will,” “expect,” “anticipate,” “believe,” “seek,” “target” or other similar expressions that predict or indicate future events or trends or that are not statements of historical matters. These forward-looking statements include, but are not limited to, statements regarding estimates and forecasts of other financial and performance metrics, projections of market opportunity and market share, and the timing of the consummation of the business combination. These statements are based on various assumptions, whether or not identified in this press release, and on the current expectations of management of GigCapital4 and are not predictions of actual performance. These forward-looking statements are provided for illustrative purposes only and are not intended to serve as, and must not be relied on by any investor as, a guarantee, an assurance, a prediction or a definitive statement of fact or probability. Actual events and circumstances are difficult or impossible to predict and will differ from assumptions. Many actual events and circumstances are beyond the control of GigCapital4. These forward-looking statements are subject to a number of risks and uncertainties, including changes in domestic and foreign business, market, financial, political, and legal conditions; the inability of the parties to successfully or timely consummate the proposed business combination, including the risk that any required regulatory approvals are not obtained, are delayed or are subject to unanticipated conditions that could adversely affect the combined company or the expected benefits of the proposed business combination or that the approval of stockholders is not obtained; failure to realize the anticipated benefits of the proposed business combination; risks relating to the uncertainty of the projected financial information with respect to BigBear.ai; risks related to the rollout of BigBear.ai's business and the timing of expected business milestones; the effects of competition on BigBear.ai's future business; the amount of redemption requests made by GigCapital4's public stockholders; the ability of GigCapital4 or the combined company to issue equity or equity-linked securities in connection with the proposed business combination or in the future. If any of these risks materialize or GigCapital4’s assumptions prove incorrect, actual results could differ materially from the results implied by these forward-looking statements. Additional factors that could cause actual results to differ are discussed under the heading “Risk Factors” and in other sections of GigCapital4’s filings with the SEC, and in GigCapital4’s current and periodic reports filed or furnished from time to time with the SEC. There may be additional risks that neither GigCapital4 nor BigBear.ai presently know or that they currently believe are immaterial that could also cause actual results to differ from those contained in the forward-looking statements. In addition, forward-looking statements reflect GigCapital4 and BigBear.ai’s expectations, plans or forecasts of future events and views as of the date of this press release, based on information available to GigCapital4 and BigBear.ai as of the date hereof. GigCapital4 and BigBear.ai assume no obligation to update any forward-looking statement, whether as a result of new information, future events or otherwise, except as may be required under applicable securities laws. While GigCapital4 and BigBear.ai may elect to update these forward-looking statements at some point in the future, GigCapital4 and BigBear.ai specifically disclaim any obligation to do so. These forward-looking statements should not be relied upon as representing GigCapital4's and BigBear.ai's assessments as of any date subsequent to the date of this press release. Accordingly, undue reliance should not be placed upon the forward-looking statements.

COLUMBIA, Md. & PALO ALTO, Calif.--(BUSINESS WIRE)---- $GIG--GigCapital4, Inc. (“GigCapital4”; Nasdaq: GIGGU, GIG, GIGGW), a private-to-public equity (PPE)™ entity also known as special purpose acquisition company (“SPAC”), announced today that it has filed on November 5 its definitive proxy statement/prospectus with the U.S. Securities and Exchange Commission ("SEC") in connection with GigCapital4's Special Meeting of Stockholders relating to the previously announced business combination (the “Business

COLUMBIA, Md. & PALO ALTO, Calif.--(BUSINESS WIRE)--BigBear.ai, a leading provider of artificial intelligence (“AI”), machine learning, cloud-based big data analytics, and cyber engineering solutions, and GigCapital4, Inc. (“GigCapital4”; Nasdaq: GIGGU, GIG, GIGGW), a private-to-public equity (PPE)TM entity also known as special purpose acquisition company, will hold a virtual Analyst Day on Wednesday, September 22, 2021 for financial analysts and investors. Event details: Wednesday, September 22, 2021 10:00am ET to 12:00pm ET Presentations and question-and-answer session with BigBear.ai and GigCapital4 executives The live webcast and replay will be available on the BigBear.ai website: https://bigbear.ai The event will include presentations from BigBear.ai and GigCapital4 leadership, including: Dr. Reggie Brothers, Chief Executive Officer, BigBear.ai; Josh Kinley, Chief Financial Officer, BigBear.ai; Brian Frutchey, Chief Technology Officer, BigBear.ai; and Dr. Raluca Dinu, Founding Managing Partner of GigCapital Global and CEO of GigCapital4. BigBear.ai and GigCapital4 announced a proposed business combination on June 4, 2021. The transaction is expected to be completed in the fourth quarter of 2021. About BigBear.ai A leader in decision dominance for more than 20 years, BigBear.ai operationalizes artificial intelligence and machine learning at scale through its end-to-end data analytics platform. The company uses its proprietary AI/ML technology to support its customers’ decision-making processes and deliver practical solutions that work in complex, realistic and imperfect data environments. BigBear.ai’s composable AI-powered platform solutions work together as often as they stand alone: Observe (data ingestion and conflation), Orient (composable machine learning at scale), and Dominate (visual anticipatory intelligence and optimization). BigBear.ai’s customers, which include the U.S. Intelligence Community, Department of Defense, the U.S. Federal Government, as well as customers in the commercial sector, rely on BigBear.ai’s high value software products and technology to analyze information, identify and manage risk, and support mission critical decision making. Headquartered in Columbia, Maryland, BigBear.ai has additional locations in Virginia, Massachusetts, Michigan, and California. For more information, please visit: http://bigbear.ai/ and follow BigBear.ai on Twitter: @BigBearai. About GigCapital4 GigCapital4, Inc. is a Private-to-Public Equity (PPE)™ company, also known as a blank check company or special purpose acquisition company (SPAC), focusing on the technology, media and telecommunications (TMT) and sustainable industries. It was sponsored by GigAcquisitions4, LLC, which was founded by GigFounders, LLC, each a member entity of GigCapital Global, and formed for the purpose of entering into a merger, share exchange, asset acquisition, stock purchase, recapitalization, reorganization or similar business combination with one or more businesses. “Private-to-Public Equity (PPE)” is a trademark of GigFounders, LLC, an affiliate GigCapital4, and is used pursuant to agreement. Participants in Solicitation BigBear.ai, GigCapital4 and their respective directors and executive officers and other persons may be deemed to be participants in the solicitations of proxies from GigCapital4’s stockholders in respect of the proposed business combination and related transactions. Information regarding GigCapital4’s directors and executive officers is available in its final prospectus prepared and filed with the SEC on February 10, 2021 under Rule 424(b)(4) promulgated by the SEC pursuant to the Securities Act of 1933, as amended (the “Securities Act”) and related to its previously filed Registration Statement on Form S-1. Additional information regarding the participants in the proxy solicitation and a description of their direct and indirect interests will be contained in the preliminary and definitive proxy statements related to the proposed business combination and related transactions when it becomes available, and which can be obtained free of charge from the sources indicated above. Additional Information and Where to Find It In connection with the proposed business combination, GigCapital4 has filed with the Securities and Exchange Commission (the “SEC”) a preliminary proxy statement under the rules of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). GigCapital4 will subsequently mail a definitive proxy statement relating to the proposed business combination to its stockholders. This press release does not contain all the information that should be considered concerning the proposed business combination and is not intended to form the basis of any investment decision or any other decision in respect of the business combination. Additional information about the proposed business combination and related transactions will be described in GigCapital4’s proxy statement relating to the proposed business combination and the respective businesses of GigCapital4 and BigBear.ai. The proposed business combination and related transactions will be submitted to stockholders of GigCapital4 for their consideration. GigCapital4’s stockholders and other interested persons are advised to read the preliminary proxy statement and, when available, the amendments thereto and the definitive proxy statement and other documents filed in connection with GigCapital4’s solicitation of proxies for its special meeting of stockholders to be held to approve, among other things, the proposed business combination and related transactions, because these materials will contain important information about BigBear.ai, GigCapital4 and the proposed business combination and related transactions. When available, the definitive proxy statement and other relevant materials for the proposed business combination will be mailed to stockholders of GigCapital4 as of a record date to be established for voting on the proposed business combinations and related transactions. Stockholders may also obtain a copy of the preliminary or definitive proxy statement, once available, as well as other documents filed with the SEC by GigCapital4, without charge, at the SEC’s website located at www.sec.gov or by directing a request to Brad Weightman, Vice President and Chief Financial Officer, GigCapital4, Inc., 1731 Embarcadero Rd., Suite 200, Palo Alto, CA 94303, or by telephone at (650) 276-7040. Forward-Looking Statements This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act, and Section 21E of the Exchange Act. Forward-looking statements may be identified by the use of words such as “estimate,” “plan,” “project,” “forecast,” “intend,” “will,” “expect,” “anticipate,” “believe,” “seek,” “target” or other similar expressions that predict or indicate future events or trends or that are not statements of historical matters. These forward-looking statements include, but are not limited to, statements regarding estimates and forecasts of other financial and performance metrics, projections of market opportunity and market share, and the timing of the consummation of the business combination. These statements are based on various assumptions, whether or not identified in this press release, and on the current expectations of management of GigCapital4 and are not predictions of actual performance. These forward-looking statements are provided for illustrative purposes only and are not intended to serve as, and must not be relied on by any investor as, a guarantee, an assurance, a prediction or a definitive statement of fact or probability. Actual events and circumstances are difficult or impossible to predict and will differ from assumptions. Many actual events and circumstances are beyond the control of GigCapital4. These forward-looking statements are subject to a number of risks and uncertainties, including changes in domestic and foreign business, market, financial, political, and legal conditions; the inability of the parties to successfully or timely consummate the proposed business combination, including the risk that any required regulatory approvals are not obtained, are delayed or are subject to unanticipated conditions that could adversely affect the combined company or the expected benefits of the proposed business combination or that the approval of stockholders is not obtained; failure to realize the anticipated benefits of the proposed business combination; risks relating to the uncertainty of the projected financial information with respect to BigBear.ai; risks related to the rollout of BigBear.ai's business and the timing of expected business milestones; the effects of competition on BigBear.ai's future business; the amount of redemption requests made by GigCapital4's public stockholders; the ability of GigCapital4 or the combined company to issue equity or equity-linked securities in connection with the proposed business combination or in the future. If any of these risks materialize or GigCapital4’s assumptions prove incorrect, actual results could differ materially from the results implied by these forward-looking statements. Additional factors that could cause actual results to differ are discussed under the heading “Risk Factors” and in other sections of GigCapital4’s filings with the SEC, and in GigCapital4’s current and periodic reports filed or furnished from time to time with the SEC. There may be additional risks that neither GigCapital4 nor BigBear.ai presently know or that they currently believe are immaterial that could also cause actual results to differ from those contained in the forward-looking statements. In addition, forward-looking statements reflect GigCapital4 and BigBear.ai’s expectations, plans or forecasts of future events and views as of the date of this press release, based on information available to GigCapital4 and BigBear.ai as of the date hereof. GigCapital4 and BigBear.ai assume no obligation to update any forward-looking statement, whether as a result of new information, future events or otherwise, except as may be required under applicable securities laws. While GigCapital4 and BigBear.ai may elect to update these forward-looking statements at some point in the future, GigCapital4 and BigBear.ai specifically disclaim any obligation to do so. These forward-looking statements should not be relied upon as representing GigCapital4's and BigBear.ai's assessments as of any date subsequent to the date of this press release. Accordingly, undue reliance should not be placed upon the forward-looking statements.