South Bow Corp., the Canadian company that inherited the Keystone pipeline system, just got a jolt of energy from Washington. Shares surged on the Toronto Stock Exchange after President Donald Trump floated the idea of reviving the Keystone XL pipeline project.
The rally marked South Bow’s biggest single-session gain in over a month.
A pipeline with nine lives
The original Keystone XL project was designed to carry crude oil from the Alberta oil sands to refineries on the US Gulf Coast. President Biden killed the project on January 20, 2021, his very first day in office, revoking its presidential permit. At that point, partial construction had already taken place.
TC Energy spun off its liquids pipeline business into a new standalone entity on October 1, 2024. That entity is South Bow Corp., which trades on the TSX under the ticker SOBO. South Bow inherited certain KXL assets along with the existing Keystone pipeline system.
On April 30, 2026, Trump signed a presidential permit for the Bridger Pipeline LLC, a project expected to link up with South Bow’s existing pipeline infrastructure.
The Prairie Connector play
South Bow has been developing something called the Prairie Connector project, which repurposes parts of the KXL infrastructure that were already partially constructed. The Prairie Connector would transport crude oil from Hardisty, Alberta to the US border, with an expected capacity of 465,000 barrels per day.
South Bow has already secured 20-year binding shipper commitments for the project. The company is targeting a final investment decision by mid-2027, contingent on stable US permitting and additional infrastructural connections on the American side of the border, where the Bridger Pipeline permit comes into play.
Why the market cares
The Trans Mountain pipeline expansion, which came online in 2024, helped relieve some pressure by opening a route to the Pacific Coast. The Prairie Connector, if built, would add nearly half a million barrels per day of takeaway capacity.
The stock’s reaction to Trump’s comments underscores a broader reality about energy infrastructure investing: regulatory risk is the dominant variable. Biden killed KXL with a stroke of a pen on his first day in office. Trump revived the concept with the April 30 Bridger Pipeline permit.
The Bridger Pipeline presidential permit is a concrete step. Combined with binding 20-year shipper contracts and repurposed KXL infrastructure that’s already partially built, South Bow’s Prairie Connector has a more tangible foundation than the original KXL project ever did at a comparable stage.
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