X0306 4 2013-01-30 0 0001489137 Molycorp, Inc. MCP 0001544521 Molibdenos Y Metales S.A. CAMINO NOS A LOS MORROS 66, SAN BERNARDO SANTIAGO, CHILE 0 0 1 0 Common Stock 2013-01-30 4 P 0 15000000 6.00 A 32050700 D 5.50% Convertible Senior Notes due 2018 2013-01-30 4 P 0 20000000 20000000 A Common Stock 20000000 20000000 D The 5.50% Convertible Senior Notes due 2018 (the "Notes") are convertible at any time prior to the close of business on the second scheduled trading day immediately preceding February 1, 2018. The conversion rate for the Notes is initially 138.8889 shares of Issuer common stock per $1,000 principal amount of Notes (equivalent to an initial conversion price of $7.20 per share of Issuer common stock), subject to adjustment, pursuant to the terms of the Notes. /s/ Fernando Ortega, VP of Corporate Affairs 2013-01-30