Ms. Rodayna Kafal reports

PYROGENESIS ANNOUNCES COMMENCEMENT OF TRADING ON THE OTCQX BEST MARKET IN THE UNITED STATES

PyroGenesis Canada Inc.'s common shares have been qualified to begin trading on the OTCQX Best Market, effective Nov. 16, 2023, under the symbol PYRGF.

As announced in the previous press release dated October 27, 2023, the Company made a strategic decision to voluntarily delist from NASDAQ and, as such, trading in the Company's Shares on that exchange ceased on November 16, 2023. The Company confirms that its Shares have begun trading on the OTCQX Best Market, quoted under symbol "PYRGF". The Company's Shares continue to be listed on the Toronto Stock Exchange under the symbol "PYR."

"We are pleased that having PyroGenesis' Shares quoted on the OTCQX Best Market ("OTCQX") provides investors with continuing access to a SEC-regulated public market," said Mr. P. Peter Pascali. "The decision to transition from NASDAQ to OTCQX reflects our commitment to optimizing operational efficiency and reducing the complexities associated with dual listing. This strategic change allows us to streamline our operations, reinforcing our commitment to finding sustainable solutions and maximizing shareholder value."

Trading on the OTCQX offers companies efficient, cost-effective access to the U.S. capital markets. It is also the highest market tier of OTC Markets, which operates markets on which over 11,000 U.S. and global securities trade. To qualify for OTCQX, companies must meet high financial standards, follow best practice corporate governance, and demonstrate compliance with applicable securities laws. U.S. investors can find current financial disclosure and Real-Time Level 2 quotes for the company on the OTC Markets website.

About PyroGenesis Canada Inc.

PyroGenesis Canada Inc., a high-tech company, is a proud leader in the design, development, manufacture and commercialization of advanced plasma processes and sustainable solutions which reduce greenhouse gases and are economically attractive alternatives to conventional "dirty" processes. PyroGenesis has created proprietary, patented and advanced plasma technologies that are being vetted and adopted by multiple multibillion dollar industry leaders in four massive markets: iron ore pelletization, aluminum, waste management, and additive manufacturing. With a team of experienced engineers, scientists and technicians working out of its Montreal office, and its 3,800 m2 and 2,940 m2 manufacturing facilities, PyroGenesis maintains its competitive advantage by remaining at the forefront of technology development and commercialization. The operations are ISO 9001:2015 and AS9100D certified, having been ISO certified since 1997.