As of Nov. 7, 2023, PolyMet is a wholly-owned subsidiary of Glencore.

Shareholders who have questions or require assistance with their Common Shares may direct questions to Computershare Investor Services Inc., at 1-800-564-6253 (toll-free in Canada and the U.S.) or 514-982-7555 (international direct dial) or by email at corporateactions@computershare.com.

Historical filings by PolyMet remain available through the company's profile on EDGAR and SEDAR+

For more information on Glencore visit glencore.com.

For information on the NorthMet and Mesaba Projects in Minnesota, visit newrangecoppernickel.com.

Patrick Keenan

Executive Vice President and Chief Financial Officer

Patrick Keenan joined PolyMet in June 2017 as chief financial officer, bringing more than 25 years of finance and mining industry experience to the executive team. He is a member of the senior executive leadership team, contributing to the overall strategic direction of the company.

Patrick previously served as senior vice president, finance and treasurer at Newmont Mining, which he joined after more than 20 years at Rio Tinto, where he served in a variety of leadership roles including chief financial officer for Rio Tinto’s Energy Group based in Brisbane, Australia, chief financial officer for Kennecott Utah Copper in Salt Lake City and Rio Tinto Diamonds based in London. In these roles he had financial oversight of major open pit and underground mining operations and projects globally including diamond, uranium and coal mines, and the Bingham Canyon copper mine in Utah, one of the larger open pit copper mines in the world.

Patrick holds a Bachelor of Science degree in accounting from the University of Utah.

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As of Nov. 7, 2023, PolyMet is a wholly-owned subsidiary of Glencore.

Patrick Keenan