Ambac Reschedules Release of First Quarter 2021 Results and Conference Call to May 10, 2021

Ambac Financial Group, Inc. (NYSE: AMBC), a financial services holding company, today announced that it has rescheduled the release of its first quarter 2021 results to May 10, 2021, before market open. Ambac is rescheduling the release to allow it to consider the possible effect on first quarter results of the May 5th announcement by the Financial Oversight and Management Board (“FOMB”) for Puerto Rico. The FOMB’s announcement provides details on an agreement with certain creditors to settle their clawback claims and establish a Plan of Adjustment framework for debts of the Puerto Rico Highways and Transportation Authority and the Puerto Rico Convention Center District Authority and a template for treatment of other clawback claims, including with respect to bonds issued by the Puerto Rico Infrastructure Financing Authority.

The agreement, as made available by the FOMB, can be accessed at the following link: https://oversightboard.pr.gov/documents/.

Conference Call

On May 10, 2021, at 8:30am (ET), Claude LeBlanc, President and Chief Executive Officer, and David Trick, Executive Vice President and Chief Financial Officer, will discuss first quarter 2021 results during a live conference call. A live audio webcast of the call will be available through the Investor Relations section of Ambac’s website, www.ambac.com. Participants may also listen via telephone by dialing (877) 407-9716 (Domestic) or (201) 493-6779 (International).

The webcast will be archived on Ambac's website. A replay of the call will be available through May 24, 2021 and can be accessed by dialing (844) 512-2921 (Domestic) or (412) 317-6671 (International), using ID#13717886.

About Ambac

Ambac Financial Group, Inc. (“Ambac” or “AFG”), headquartered in New York City, is a financial services holding company. Ambac's subsidiaries include: Ambac Assurance Corporation and Ambac Assurance UK Limited, financial guarantee insurance companies currently in runoff; Everspan Indemnity Insurance Company and Everspan Insurance Company, specialty property & casualty program insurers; and Xchange Benefits, LLC and Xchange Affinity Underwriting Agency, LLC, property & casualty Managing General Underwriters. Ambac’s common stock trades on the New York Stock Exchange under the symbol “AMBC”. The Amended and Restated Certificate of Incorporation of Ambac contains substantial restrictions on the ability to transfer Ambac’s common stock. Subject to limited exceptions, any attempted transfer of common stock shall be prohibited and void to the extent that, as a result of such transfer (or any series of transfers of which such transfer is a part), any person or group of persons shall become a holder of 5% or more of Ambac’s common stock or a holder of 5% or more of Ambac’s common stock increases its ownership interest. Ambac is committed to providing timely and accurate information to the investing public, consistent with our legal and regulatory obligations. To that end, we use our website to convey information about our businesses, including the anticipated release of quarterly financial results, quarterly financial, statistical and business-related information. For more information, please go to www.ambac.com.

Forward-Looking Statements:

In this press release, statements that may constitute “forward-looking statements” within the meaning of the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Words such as “estimate,” “expect,” “project,” “plan,” “believe,” “anticipate,” “intend,” “planned,” “potential” and similar expressions, or future or conditional verbs such as “will,” “should,” “would,” “could,” and “may,” or the negative of those expressions or verbs, identify forward-looking statements. We caution readers that these statements are not guarantees of future performance. Forward-looking statements are not historical facts but instead represent only our beliefs regarding future events, which may by their nature be inherently uncertain and some of which may be outside our control. These statements may relate to plans and objectives with respect to the future, among other things which may change. We are alerting you to the possibility that our actual results may differ, possibly materially, from the expected objectives or anticipated results that may be suggested, expressed or implied by these forward-looking statements. Important factors that could cause our results to differ, possibly materially, from those indicated in the forward-looking statements include, among others, those discussed under “Risk Factors” in our most recent SEC filed quarterly or annual report.

Any or all of management’s forward-looking statements here or in other publications may turn out to be incorrect and are based on management’s current belief or opinions. Ambac’s actual results may vary materially, and there are no guarantees about the performance of Ambac’s securities. Among events, risks, uncertainties or factors that could cause actual results to differ materially are: (1) the highly speculative nature of AFG’s common stock and volatility in the price of AFG’s common stock; (2) uncertainty concerning the Company’s ability to achieve value for holders of its securities, whether from Ambac Assurance Corporation ("Ambac Assurance") and its subsidiaries or from transactions or opportunities apart from Ambac Assurance and its subsidiaries, including new business initiatives; (3) changes in Ambac’s estimated representation and warranty recoveries or loss reserves over time; (4) failure to recover claims paid on Puerto Rico exposures or incurrence of losses in amounts higher than expected; (5) adverse effects on AFG’s share price resulting from future offerings of debt or equity securities that rank senior to AFG’s common stock; (6) potential of rehabilitation proceedings against Ambac Assurance; (7) dilution of current shareholder value or adverse effects on AFG’s share price resulting from the issuance of additional shares of common stock; (8) inadequacy of reserves established for losses and loss expenses and possibility that changes in loss reserves may result in further volatility of earnings or financial results; (9) increased fiscal stress experienced by issuers of public finance obligations or an increased incidence of Chapter 9 filings or other restructuring proceedings by public finance issuers, including an increased risk of loss on revenue bonds of distressed public finance issuers due to judicial decisions adverse to revenue bond holders; (10) Ambac's inability to realize the expected recoveries included in its financial statements; (11) insufficiency or unavailability of collateral to pay secured obligations; (12) credit risk throughout Ambac’s business, including but not limited to credit risk related to residential mortgage-backed securities, student loan and other asset securitizations, public finance obligations (including obligations of the Commonwealth of Puerto Rico and its instrumentalities and agencies) and exposures to reinsurers; (13) credit risks related to large single risks, risk concentrations and correlated risks; (14) the risk that Ambac’s risk management policies and practices do not anticipate certain risks and/or the magnitude of potential for loss; (15) risks associated with adverse selection as Ambac’s insured portfolio runs off; (16) adverse effects on operating results or the Company’s financial position resulting from measures taken to reduce risks in its insured portfolio; (17) disagreements or disputes with Ambac's insurance regulators; (18) our inability to mitigate or remediate losses, commute or reduce insured exposures or achieve recoveries or investment objectives, or the failure of any transaction intended to accomplish one or more of these objectives to deliver anticipated results; (19) Ambac’s substantial indebtedness could adversely affect its financial condition and operating flexibility; (20) Ambac may not be able to obtain financing or raise capital on acceptable terms or at all due to its substantial indebtedness and financial condition; (21) Ambac may not be able to generate the significant amount of cash needed to service its debt and financial obligations, and may not be able to refinance its indebtedness; (22) restrictive covenants in agreements and instruments may impair Ambac's ability to pursue or achieve its business strategies; (23) loss of control rights in transactions for which we provide insurance due to a finding that Ambac has defaulted; (24) the impact of catastrophic environmental or natural events, including catastrophic public health events like the COVID-19 pandemic, on significant portions of our insured and investment portfolios; (25) adverse tax consequences or other costs resulting from the characterization of Ambac Assurance’s surplus notes or other obligations as equity; (26) risks attendant to the change in composition of securities in Ambac’s investment portfolio; (27) changes in prevailing interest rates; (28) the expected discontinuance of the London Inter-Bank Offered Rate; (29) factors that may influence the amount of installment premiums paid to Ambac; (30) default by one or more of Ambac's portfolio investments, insured issuers or counterparties; (31) market risks impacting assets in Ambac’s investment portfolio or the value of our assets posted as collateral in respect of interest rate swap transactions; (32) risks relating to determinations of amounts of impairments taken on investments; (33) the risk of litigation and regulatory inquiries or investigations, and the risk of adverse outcomes in connection therewith, which could have a material adverse effect on Ambac’s business, operations, financial position, profitability or cash flows; (34) actions of stakeholders whose interests are not aligned with broader interests of Ambac's stockholders; (35) system security risks, data protection breaches and cyber attacks; (36) changes in accounting principles or practices that may impact Ambac’s reported financial results; (37) the economic and regulatory impact of “Brexit”; (38) operational risks, including with respect to internal processes, risk and investment models, systems and employees, and failures in services or products provided by third parties; (39) Ambac’s financial position that may prompt departures of key employees and may impact its ability to attract qualified executives and employees; (40) fluctuations in foreign currency exchange rates could adversely impact the insured portfolio in the event of loss reserves or claim payments denominated in a currency other than US dollars and the value of non-US dollar denominated securities in our investment portfolio; (41) decisions made by Ambac Assurance’s primary insurance regulator for the benefit of policyholders that may result in material adverse consequences for holders of Ambac’s securities or holders of securities issued or incurred by Ambac Assurance; and (42) other risks and uncertainties that have not been identified at this time.

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