Perpetua in talks with Glencore, others for US antimony processing; shares rise

** Shares of mining company Perpetua Resources PPTA.O rise 3.1% to $19.58 premarket

** Co says it is in talks with Glencore GLEN.L, TrafiguraTRAFG.UL, Clarios and Sunshine Silver about partnership to refine antimony in U.S.

** PPTA plans to seek proposals in coming weeks, with decision expected by end of year

** Co is expected to begin construction of its antimony and gold mine in Idaho; mine will be largest U.S. supplier of antimony

** PPTA says it "is pursuing processing arrangements that maximize value for shareholders while securing an antimony supply chain for U.S. consumers"

** Co only plans to extract antimony but not refine it, fueling push to secure processing partnerships

** As of last close, stock is up 78% YTD