It comes after the latter received $2.5mln worth of shares in Anfield due to sale of uranium assets, which was announced in August this year.
Payments for this sale were staged as three issues of Anfield shares, with the most recent and final $1mln consisting of over 24.9mln shares of Anfield.
Anfield said that U.S. Energy expects to use the holdings as collateral until being monetized and allocated toward development capital, as market conditions warrant.
U.S. Energy divested all remaining mining assets during 2016 and no longer has any mining related interests.
Anfield shares fell 12.5% to C$0.035 in Toronto.