IIROC; Resumption; Canadian National Railway

| Source: Investment Industry Regulatory Organization of Canada (IIROC) Investment Industry Regulatory Organization of Canada (IIROC)

TORONTO, ONTARIO--(Marketwire - April 23, 2012) -

Company / Société : Canadian National Railway
TSX Symbol / Symbole TSX : CNR
Resumption / Reprise : HH:MM AM ET/HH h MM (HE)
04:30pm (ET) / 16h30(HE)

Please note that IIROC is not able to provide any additional information regarding a specific trading halt. Information is limited to general enquiries only.

Contact Information:

IIROC Inquiries
1-877-442-4322 (Option 3)