South Bow Raised 2026 EBITDA to $1.04B - But One Pipeline Bottleneck Still Caps the Upside

Guidance improvement strengthens the base case

Raised guidance improves South Bow's 2026 setup, but milepost 171 restrictions still limit how cleanly upside can be realized.

Management reported Q2 2026 normalized EBITDA $280 million, then raised full-year normalized EBITDA guidance to CAD 1.04 billion and full-year distributable cash flow guidance to CAD 665 million. That upgrade suggests the existing system is still performing well enough to matter.

The more interesting question is whether the market is focusing too much on current earnings and not enough on future capacity. South Bow also secured 465,000 bbl/d of firm transportation services under 20-year commitments, which looks like useful evidence of demand for additional pipeline capacity, not just a one-time headline.

Demand looks operational, not theoretical

Throughput and network use remain credible

South Bow is a liquids pipeline franchise that connects western Canadian supply to U.S. refining demand. The traffic data supports that story. In the first quarter, Keystone moved about 616,000 bbl/d of average throughput, while the U.S. Gulf Coast segment averaged roughly 709,000 bbl/d.

The Blackrod Connection also adds practical value. South Bow placed the project into commercial service during the first quarter on schedule and on budget, and the company expects it to contribute about $10 million in normalized EBITDA in 2026.

The 20-year customer commitments matter

The clearest demand signal is 465,000 barrels per day of 20-year customer commitments. South Bow described those as 20-year binding commitments for 465,000 bbl/d of firm transportation services. That level of commitment usually points to a real need for dependable market access rather than tentative interest.

If investors value South Bow mainly on today's earnings, they may be underestimating how strongly future expansion demand is already backed.

Milepost 171 remains the main constraint

The core business appears sound, but the expansion story still depends on timing. Pressure restrictions from milepost 171 are still in place, with phased lifting expected only through end of 2026 and into 2027. That keeps a cap on near-term capacity and leaves the upside tied to execution.

Permit durability is another watchpoint. Even if demand looks solid, delays would weaken the case that the next step is ready to be fully valued today.

What investors should watch next

South Bow is now in a transition zone between a strong current cash-flow story and a more forward-looking expansion story. Management is targeting FID for Prairie Connector and Liberty Bridge by mid-2027, while leverage stood at 4.4x net debt to normalized EBITDA at Q2 end.

The key markers over the next few quarters are straightforward:

• Whether milepost 171 restrictions ease on or closer to the expected timeline
• Whether FID stays on track for mid-2027
• Whether permits remain a manageable risk rather than a real blocker
• Whether throughput stays strong enough to confirm that demand is holding up

If those steps advance together, investors are more likely to view South Bow as more than just a mature cash-flow asset. If they slip, the stock may stay anchored to today's earnings instead of the next phase of capacity.