3 Best-performing Canadian Cleantech Stocks of 2025

1. Tantalus Systems (TSX:GRID)

Year-to-date gain: 76.32 percent
Market cap: C$179.48 million
Share price: C$3.35

Tantalus Systems provides technology that gives utilities greater control and insight into their electric grids.

This includes advanced metering infrastructure (AMI), load management systems and grid analytics, all of which contribute to a more efficient and reliable power grid.

One of its key products, TRUConnect AMI, provides real-time data on energy consumption and grid conditions. The TRUFlex Load+DER Management system helps manage energy demand and integrate distributed energy resources like solar power, while TRUGrid Automation optimizes grid operations and improves response to events like power failures.

On July 7, Tantalus announced that it was extending its partnership with EPB in Chattanooga, Tennessee, to deploy 20,000 TRUSense Ethernet Gateways over the next five years, integrating with EPB's fiber network to enhance grid modernization and operational efficiency.

2. Anaergia (TSX:ANRG)

Year-to-date gain: 44.68 percent
Market cap: C$229.36 million
Share price: C$1.36

Anaergia is a global company that specializes in converting waste, including wastewater and agricultural and municipal solid waste, into renewable energy, clean water and organic fertilizer.

In July 2024, Anaeriga announced the completion of a strategic investment, saying it had closed the third tranche of a C$40.8 million investment deal with Marny Investissement that gave Marny a controlling interest of about 60 percent in Anaergia. The investment supported Anaergia's strategic pivot to prioritizing capital-efficient growth and streamlined operations, with a greater focus on technology sales and operation and maintenance contracts.

The company has operations in 17 countries spanning North America, Africa, Asia and Europe. So far in 2025, Anaergia has expanded its global reach through partnerships with companies in Italy and Spain, as well as through a partnership agreement to build a biogas facility in South Korea.

3. CVW CleanTech (TSXV:CVW)

Year-to-date gain: 18.82 percent
Market cap: C$148.28 million
Share price: C$1.01

CVW CleanTech is focused on making the Canadian oil sands industry more sustainable.

The company's Creating Value from Waste (CVW) technology recovers bitumen and valuable minerals like titanium and zircon from oil sands tailings ponds, reducing the environmental impact of oil and gas production.

In 2024, the company transitioned to a royalty-based model, investing in other cleantech companies in exchange for a share of their revenue. Its first royalty investment was in Northstar Clean Technologies (TSXV:ROOF,OTCQB:ROOOF), a company with technology that processes end-of-life asphalt shingles into components including liquid asphalt, as well as aggregate and fiber for industrial use. The deal was finalized in September.

Now, the company is seeking shareholder approval to change its name to CVW Sustainable Royalties and switch its TSX Venture exchange listing from a technology issuer to an investment issuer, further solidifying its change in focus. However, it is still committed to commercializing its CVW technology.