Industry Primer: Canadian Class I Railroads for DIY Stock Investors

Canada has exactly two railways big enough to be “Class I”: Canadian National (TSX: CNR) and Canadian Pacific Kansas City (TSX: CP). Both are among the most widely held industrial stocks on the TSX. This primer is company- and regulation-specific: how the two networks differ, which rules cap or shape their revenue, and the labour and regulatory history that occasionally jolts both stocks at once.

For the generic railroad business model — operating ratio, pricing power, carload mix — read Industrials – Rails: how money is made first. Educational primer — not a recommendation.

Direct answer

“Class I” is a US Surface Transportation Board (STB) category for freight railroads with annual operating revenue above an inflation-indexed threshold — about US$1.09 billion for 2025. CN and CPKC are the only Canadian-based Class I railroads, and both run large US networks under STB oversight. In Canada they’re federally regulated under the Canada Transportation Act, which includes a revenue cap on western grain (the maximum revenue entitlement, MRE), shipper remedies such as long-haul interswitching, and federal labour law under the Canada Labour Code. CN’s network reaches three coasts (Atlantic, Pacific and the US Gulf); CPKC, created when Canadian Pacific combined with Kansas City Southern in April 2023, is the only single-line network linking Canada, the US and Mexico.

CN vs CPKC: the networks

	CN (CNR)	CPKC (CP)
Footprint	Canada coast to coast, plus a north–south US line to the Gulf of Mexico	Canada coast to coast, US Midwest, and Kansas City Southern’s lines to the Gulf and into Mexico
Signature advantage	Access to Prince Rupert and Halifax as well as Vancouver; the “three coasts” network	Single-line service Canada–US–Mexico since the 2023 combination
Key ports	Vancouver, Prince Rupert, Montreal, Halifax, US Gulf	Vancouver, Montreal, US Gulf, Lázaro Cárdenas (Mexico)
Main growth story	Intermodal via West Coast ports, bulk exports	Cross-border synergies and new Mexico–US–Canada service
Main extra risk	Canadian bulk volumes, port and weather disruptions	Integration, Mexico concession and cross-border trade policy

Both carry similar Canadian freight — grain, potash, coal, energy products, forest products, intermodal containers and autos — so policy shocks in Canada tend to hit both. Recent dated briefs: CN downgrade and CPKC Q3 fuel squeeze.

Regulation that shapes revenue

Rule	What it does	Why investors care
Maximum revenue entitlement (MRE)	Caps each railway’s total revenue from regulated western grain per crop year; the Canadian Transportation Agency sets a cost index (VRCPI) each spring and determines the final MRE	Limits pricing on a large Prairie commodity; exceeding the cap means repaying the excess plus a penalty
Long-haul interswitching	Lets captive shippers ask the Agency to set a rate to move traffic to a competing railway’s interchange	Caps pricing power at captive locations
Level-of-service complaints and final offer arbitration	Shippers can ask the Agency to rule on service or rates	Periodic rulings and political pressure on service
Canada Labour Code	Federal labour law for interprovincial railways; the Minister can refer disputes under s.107	Strikes or lockouts can halt both networks at once
STB (US)	US rate and merger oversight	Merger approvals and US service rules

For the 2026–27 crop year the Agency set the volume-related composite price index at 1.9864 for CN and 1.9474 for CPKC; the final MRE for each railway is determined after the crop year ends.

Labour: a shared event risk

In August 2024, CN and CPKC both locked out Teamsters Canada Rail Conference members on August 22, halting most freight rail in Canada. The federal Labour Minister used section 107 of the Canada Labour Code to direct the Canada Industrial Relations Board to order a return to work and binding arbitration, and operations resumed within days. The lesson for investors: because the two railways negotiate with the same union on similar timelines, labour risk is correlated — owning both doesn’t diversify it away.

What to watch

Metric	Why
Operating ratio (operating expenses ÷ revenue)	Core efficiency measure; lower is better
Revenue ton-miles and carloads by commodity	Volume trend by business line
Fuel surcharge revenue vs fuel costs	Lags can squeeze margins when fuel moves fast
Grain volumes vs MRE	Regulated revenue headroom
Labour contract expiry dates	Event-risk calendar
Capital spending and free cash flow	Track and equipment are heavy, recurring costs — see what is owner earnings?

Related reading

• Industrials – Rails: industry structure and how money is made
• Living sector snapshot: Transportation
• Concentration risk when Canada is already concentrated (correlated holdings)

Sources

• Surface Transportation Board, Railroad revenue deflator factors (Class I thresholds).
• Canadian Transportation Agency, Western grain: Maximum Revenue Entitlement program and the 2026–2027 VRCPI determination.
• Employment and Social Development Canada and Canada Industrial Relations Board records on the August 2024 rail labour dispute (section 107 referral).
• Canada Transportation Act (S.C. 1996, c. 10), Part III, Division VI (western grain) and interswitching provisions.

Media credits

• Hero: “CPKC 7530 crossing Bartlett Avenue in Toronto.jpg” by Qviri, CC BY-SA 4.0, via Wikimedia Commons. Cropped and resized to 1280×720. Real photograph, not AI-generated.

By Andrew · stocksummarizer.com