Hudson’s Bay Co.‘s Royal Charter, seen here, is a historical document that gave it exclusive trading rights over a portion of Canada in 1670. Photo by Handout/Manitoba Museum/THE CANADIAN PRESS files

Two Canadian companies have teamed up to bid at least $18 million for Hudson’s Bay Co. ‘s Royal Charter, a historical document that gave it exclusive trading rights over a portion of Canada in 1670.

Wittington Investments Ltd., a private entity owned by the Weston family, and DKRT Family Corp., owned by David Thomson , Canada’s richest person, will bid at least $18 million when the auction for the charter takes place early next month, according to court documents released Nov. 14.

Previously, both Wittington and DKRT had put in separate bids to buy the charter. HBC in June said it had

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