Onex to Announce Fourth-Quarter and Full-Year 2011 Results on February 23, 2012

TORONTO, ONTARIO--(Marketwire - Jan. 30, 2012) -

All amounts in U.S. dollars unless otherwise stated.

Onex Corporation (TSX:OCX) announced that it will release its results for the fourth quarter and full year ended December 31, 2011 on February 23, 2012. A live broadcast of Onex' conference call to discuss the results will begin at 4:30 p.m. ET on February 23, 2012. A 90-day on-line replay will be available following the conclusion of the live broadcast. A link to the call and the replay will be available 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 $13 billion, of which $9 billion is third-party capital. As well, Onex invests its own capital directly and as a substantial limited partner in its Funds.

Onex' businesses have assets of $42 billion, generate annual revenues of $37 billion and employ approximately 230,000 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.