Ontario business news — the Ontario Darlington SMR Contracts are landing close to home: 14 contracts have gone to companies across the Greater Toronto and Hamilton Area to supply equipment and materials for Canada’s first small modular reactor at the Darlington New Nuclear Project in Clarington.
By Maplestime Business Desk | Toronto, Ontario | November 7, 2026
Sources: Canadian Manufacturing | Wesal TV | Last updated: November 7, 2026
Key Takeaways
- 14 contracts awarded to GTA and Hamilton companies for the first SMR at Darlington.
- The contracts are expected to add more than $110 million to Ontario’s GDP and support hundreds of jobs.
- Named suppliers include Armstrong Fluid Technology, Hooper Welding, and St. Mary’s Cement.
- More than 100 Canadian companies have now signed agreements with Ontario Power Generation on the project.
- Four SMR units will deliver 1,200 MW — enough to power 1.2 million homes — with the first unit producing power by the end of 2030.
Who Won the Ontario Darlington SMR Contracts
The Ontario government announced the awards on Friday, November 6. Among the named suppliers: Scarborough-based Armstrong Fluid Technology, which won a $3.9-million contract for a pumphouse enclosure and pumps; Oakville-based Hooper Welding, supplying steel for structural modules; and Toronto-based St. Mary’s Cement, providing concrete and a high-density concrete batch plant.
More than 100 Canadian companies have now signed agreements with Ontario Power Generation on the project. That is the number that matters most: this is not a single mega-contract handed to one giant, but a web of work spreading across Ontario manufacturers.
The Money and the Jobs
The 14 contracts are expected to add more than $110 million to Ontario’s GDP and support hundreds of jobs. Energy and Mines Minister Stephen Lecce put the stakes plainly: “By being first in the G7 to build small modular reactors, Ontario is securing a first-mover advantage that translates into real contracts and good-paying jobs.”
Being first in the G7 is a bold claim, and Ontario is betting heavily on it. The first reactor is expected to cost about $7.7 billion including shared infrastructure, and all four units are estimated at $20.9 billion. Those are staggering sums — and the province’s argument is that the payoff comes in jobs, exports, and energy security for decades.
What the Darlington SMRs Will Deliver
Once complete, the four SMR units will deliver 1,200 MW of electricity — enough to power 1.2 million homes. The first unit is expected to begin producing power by the end of 2030.
That timeline is the test. Nuclear projects in Canada have a long history of running late and over budget, and $20.9 billion is the kind of figure that invites scrutiny. But if Darlington delivers on schedule, Ontario will have built something no other G7 country has — and the GTA and Hamilton firms winning these contracts will be first in line for the next ones, at home and abroad.
Maplestime will provide updates from the Ontario Darlington SMR Contracts as announcements are made.
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Is $20.9 billion a smart bet on Ontario’s energy future, or another mega-project that will cost far more than promised? Tell us in the comments. And share this with every Canadian watching the future of nuclear power.
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