Montreal-based Canadian National has offered $30 billion for its U.S. rival, but the transaction appears to have little chance of succeeding.

Wilks Brothers has made a competing proposal to recapitalize struggling energy company Calfrac Well Services Ltd. and criticized management’s deal as favoring insiders.

Amazon.com has signed a deal with Cargojet Inc. that would allow the online retailer to buy a stake in the Canadian cargo carrier.

Shopify Inc. plans to spend $1 billion to set up a network of fulfillment centers in the United States to help merchants using its e-commerce platform deliver products more quickly and cheaply, much the way Amazon.com does.