Onex to Host Annual Investor Day

TORONTO, ONTARIO--(Marketwire - May 26, 2011) -

All amounts in U.S. dollars unless otherwise stated

Onex (TSX:OCX) announced that it will host its annual Investor Day on June 1, 2011. The event will be webcast live beginning at 10:00 a.m. ET. Webcast participants will have the option of emailing questions to the presenters during the live event. A replay will be available for 90 days a few days following the conclusion of the presentations. A link to the webcast and the replay can be found under the Investor Information section of Onex' website at www.onex.com.

About Onex

Onex is one of North America's oldest and most successful investment firms committed to acquiring and building high-quality businesses in partnership with talented management teams. Onex manages investment platforms focused on private equity, real estate and credit securities. In total, the company manages approximately $15 billion, of which $10 billion is third-party capital. As well, Onex invests its own capital directly and as a substantial limited partner in its Funds.

Onex' businesses generate annual revenues of $28 billion, have assets of $40 billion and employ approximately 212,000 people worldwide. Onex shares trade on the Toronto Stock Exchange under the stock symbol OCX. For more information on Onex, visit its website at www.onex.com. The company's security filings can also be accessed at www.sedar.com.