Onex Announces Transformational Investment and New Strategic Relationship to Drive Enterprise Growth and Shareholder Value

Onex and AIG to acquire Convex, a leading specialty property and casualty (re)insurer that has delivered industry leading growth and strong underwriting profitability, for $7 billion.Onex to own 63% of Convex, AIG to own 35%, with the balance owned by the Convex management team. AIG to acquire a 9.9% equity stake in Onex and will commit $2 billion to Onex’ private equity and credit strategies over the next three years.Transaction leverages Onex’ knowledge of Convex and deep expertise in the insurance ecosystem, where Onex has delivered strong historical investment performance. TORONTO, Oct. 30, 2025 (GLOBE NEWSWIRE) -- Onex Corporation (“Onex”) today announced a transformational investment and new strategic relationship to accelerate growth and drive enterprise value creation. The benefits to Onex include: The acquisition of a market leading specialty property and casualty insurance and reinsurance business with a proven management team that is positioned for continued strong growth. Onex was a founding investor in Convex Group Limited (“Convex”) in 2019 through Onex Partners V and has worked closely with Stephen Catlin, Paul Brand and the Convex management team to build the business into a highly successful, fast growing and profitable organization.A strategic investment by American International Group, Inc. (“AIG”), one of the world’s leading insurance companies, to acquire a 9.9% stake in Onex. AIG will invest $2 billion of new fee generating assets under management in Onex’ private equity and credit strategies, consistent with its investment guidelines.A more efficient future deployment of Onex’ balance sheet, with continued flexibility for deployment into core areas of expertise, to drive strong long-term investing capital growth. “Today’s announcement is a logical and foundational step forward for Onex,” said CEO, Bobby Le Blanc. “With these transactions, we are bolstering our already significant position in the insurance sector, securing the support of one of the world’s largest insurers, accelerating profitability of our asset management business and facilitating future growth in our investing capital.” Transaction Overview Onex and AIG have entered into an agreement to jointly acquire the entire interest held by Onex Partners V and its co-investors in Convex. Following the acquisition, Onex and AIG will own approximately 63% and 35%, respectively, of Convex, with the remainder held by the Convex management team. The acquisition values Convex at a $7 billion equity valuation, representing 1.9x Q3 2025 tangible book value. Stephen Catlin, Paul Brand and the Convex management team founded Convex in 2019 as a de novo insurer in partnership with capital provided by Onex Partners V and its co-investors. Since that time, Convex has rapidly grown into a leading specialty property and casualty (re)insurer with: Up to $6 billion of expected gross premium written in 2025,25% compound annual growth in gross premium written over the last three years, and 18% average return on equity over the past three years. The Convex management team will retain a significant economic interest in the business, ensuring strong ongoing alignment with Onex and AIG. A portion of Convex’s investment portfolio is currently allocated to Onex-managed funds, and that is expected to increase over time. In connection with the transaction, AIG has agreed to subscribe for a 9.9% interest in Onex’ subordinate voting shares, concurrent with the closing of the Convex acquisition, for proceeds totalling approximately $0.6 billion. AIG will also make capital commitments of $2 billion to strategies managed by Onex over a three-year period, driving a significant benefit to Onex’ fee-related earnings. AIG will enter into an investor rights agreement that, among other things, includes a minimum three-year lock-up on the shares acquired, customary standstill provisions and the right to nominate a director to Onex’ board and who will be mutually agreed upon by Onex and AIG. Onex intends to use the proceeds from the AIG subscription to fund the acquisition. “With AIG and Convex, two outstanding and world-class organizations, we are ready to enter a new phase of growth and innovation that will bring value to all stakeholders,” added Mr. Le Blanc. “We strongly believe that the expertise and capabilities across all three organizations are truly greater than the sum of the parts.” Peter Zaffino, Chairman & CEO, AIG commented: “With Onex Corporation, Convex’s primary shareholder, we are building a strategic relationship with an outstanding team, led by CEO Bobby Le Blanc, that has significant experience investing in highly specialized insurance assets. I am pleased that Onex has committed to increasing its ownership share of Convex, preserving Convex’s independence for the long-term. AIG will also benefit from preferred access to Onex’ world-class investment funds, and I look forward to working with Bobby and his talented team as they continue to make strategic investments in various sectors.” Stephen Catlin, executive chair of Convex Group, said: “In six years, the team at Convex has built an extraordinary business. We have become a major player in global specialty insurance and reinsurance, with annual premium income up to $6 billion and operations in a range of global jurisdictions. We’ve known Peter Zaffino for over 20 years in numerous leadership roles. We greatly admire the contribution he has made to the industry as a whole and, together with the outstanding team he has built at AIG, the successful execution of his strategic vision, positioning AIG for growth and delivering attractive risk adjusted returns for AIG shareholders. This transaction secures the long-term independence of Convex and presents a range of exciting strategic opportunities. We would like to thank our founding shareholders, including Onex, for their unwavering support in establishing and growing the business, and our other supporters within the insurance market. Without them we would not be where we are today.” Paul Brand, CEO of Convex Group, added: “This is a hugely exciting development for Convex. The Convex team have worked incredibly hard over the last six years to build a world-renowned insurance company, and we see this transaction as the start of the next chapter in our journey. We are delighted to continue our productive partnership with Onex, and that they have decided to make this considerable investment from their own balance sheet. We are also excited to begin a new relationship with AIG. This transaction positions us better than ever to service our clients and brokers, and take advantage of future market opportunities.” Financial Consideration Pursuant to the acquisition, Onex will acquire a 63% equity stake in Convex for approximately $3.8 billion. Onex intends to roll over its existing interest in Convex of $0.7 billion, with the remainder financed through $1.5 billion of cash on Onex’ balance sheet and pending asset sales, $1.0 billion of debt financing secured on existing private equity and credit assets, and $0.6 billion of equity financing proceeds from the AIG subscription. Following the completion of all transactions, Convex is expected to account for 42% of Onex’ investing capital and become a key contributor to future shareholder value creation. The transaction is expected to close in the first half of 2026, subject to customary regulatory approvals. Additional Information A presentation with additional information on today’s announcement is available on the home page of the Onex website at www.onex.com. As a reminder, Onex will release its third quarter 2025 results on the morning of Friday, November 7th, followed by a live webcast at 11:00 a.m. ET to discuss the third quarter results and this transaction. A link to the webcast and on-line replay will be available on Onex’ website at www.onex.com. Onex was advised by Goldman Sachs & Co. LLC as lead financial adviser and Latham & Watkins and Torys as legal advisers on the transaction. About Onex Onex invests and manages capital on behalf of its shareholders and clients across the globe. Formed in 1984, we have a long track record of creating value for our clients and shareholders. Our investors include a broad range of global clients, including public and private pension plans, sovereign wealth funds, banks, insurance companies, family offices and high-net-worth individuals. In total, Onex has approximately $55.9 billion in assets under management, of which $8.4 billion is Onex’ own investing capital. With offices in Toronto, New York, New Jersey and London, Onex and its experienced management teams are collectively the largest investors across Onex’ platforms. Onex is listed on the Toronto Stock Exchange under the symbol (TSX:ONEX). For more information on Onex, visit its website at www.Onex.com. Onex’ security filings can also be accessed at www.sedarplus.ca. About Convex Convex is an international specialty insurer and reinsurer focused on complex specialty risks across a diverse range of business lines. Convex occupies a unique position in the insurance industry combining unrivalled experience, reputation and a legacy free balance sheet. Convex operates out of London, Bermuda, Luxembourg and New Jersey. The company has a ‘A’ (Excellent) A.M. Best rating and an ‘A’ S&P rating. For additional information, visit www.convexin.com. About AIG AIG, Inc. (NYSE:AIG) is a leading global insurance organization. AIG provides insurance solutions that help businesses and individuals in more than 200 countries and jurisdictions protect their assets and manage risks through AIG operations, licenses and authorizations as well as network partners. For additional information, visit www.aig.com. Forward-Looking Statements This press release may contain, without limitation, statements concerning possible or assumed future operations, performance or results preceded by, followed by or that include words such as “believes”, “expects”, “potential”, “anticipates”, “estimates”, “intends”, “plans” and words of similar connotation, which would constitute forward-looking statements. The forward-looking statements in this news release include statements regarding Onex Corporation and AIG, Inc.’s acquisition of Onex Partners V’s interest in the Convex Group, AIG Inc.’s subscription for Onex shares, AIG, Inc.’s capital commitments and the entering into of the investor rights agreement. By its nature, forward-looking information is subject to numerous risks and uncertainties, some of which are beyond Onex Corporation and AIG, Inc.’s control. The forward-looking information contained in this news release is based on certain key expectations and assumptions made by Onex Corporation and AIG, Inc., including, without limitation, the Acquisition and the AIG Investment will be completed on the terms currently contemplated, the Acquisition and the AIG Investment will be completed in accordance with the timing currently expected, all conditions to the completion of the Acquisition will be satisfied or waived and the purchase agreement will not be terminated prior to the completion of the Acquisition. Forward-looking statements are not guarantees. The reader should not place undue reliance on forward-looking statements and information because they involve significant and diverse risks and uncertainties that may cause actual operations, performance, or results to be materially different from those indicated in these forward-looking statements. Except as may be required by Canadian securities law, Onex is under no obligation to update any forward-looking statements contained herein should material facts change due to new information, future events or other factors. These cautionary statements expressly qualify all forward-looking statements in this press release. Non-GAAP Financial Measures This press release contains non-GAAP financial measures which have been calculated using methodologies that are not in accordance with IFRS Accounting Standards. The presentation of financial measures in this manner does not have a standardized meaning prescribed under IFRS Accounting Standards and is therefore unlikely to be comparable to similar financial measures presented by other companies. Onex management believes these financial measures provide useful information to investors. Reconciliations of the non-GAAP financial measures to information contained in the consolidated financial statements have been presented where practical. Contacts: Jill HomenukManaging Director – ShareholderRelations and CommunicationsTel: +1 416.362.7711Zev KormanVice President, ShareholderRelations and CommunicationsTel: +1 416.362.7711

Onex Announces Transformational Investment and New Strategic Relationship to Drive Enterprise Growth and Shareholder Value

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