ONEX Onex Corporation

Onex Corporation (“Onex”) (TSX: ONEX) will host its 2023 Investor Day for shareholders and analysts on September 28, 2023. Presentations will begin at 9:00 a.m. ET and the event will last approximately three hours, concluding with a Q&A session. Onex’ senior management team will provide updates on the company’s businesses and growth strategies.

The event webcast and related presentation materials will be available through the Shareholders section of Onex’ website at https://www.onex.com/events-and-presentations. A replay will also be available on the website shortly after the event.

About Onex

Onex is an investor and asset manager that invests capital on behalf of Onex shareholders and clients across the globe. Formed in 1984, we have a long track record of creating value for our clients and shareholders. Onex’ two primary businesses are Private Equity and Credit. In Private Equity, we raise funds from third-party investors, or limited partners, and invest them, along with Onex’ own investing capital, through the funds of our private equity platforms, Onex Partners and ONCAP. Similarly, in Credit, we raise and invest capital across several private credit, public credit and public equity strategies. Our investors include a broad range of global clients, including public and private pension plans, sovereign wealth funds, insurance companies and family offices. In total, Onex has $49.5 billion in assets under management, of which $7.9 billion is Onex’ own investing capital. With offices in Toronto, New York, New Jersey, Boston 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 ONEX. For more information on Onex, visit its website at www.onex.com. Onex’ security filings can also be accessed at www.sedar.com.

For further information:

Jill Homenuk Managing Director – Shareholder Relations and Communications +1 416.362.7711

Zev Korman Vice President, Shareholder Relations and Communications +1 416.362.7711