Primero Mining Corp. today announced the closing of its offering of US$75 million aggregate principal amount of 5.75% convertible unsecured subordinated debentures maturing on February 28, 2020, as previously announced on January 20, 2015. Primero has granted the syndicate of underwriters, led by RBC Capital Markets, and including BMO Capital Markets, Scotiabank, Canaccord Genuity Corp., CIBC World Markets Inc. and TD Securities Inc., an option to purchase additional Debentures in an amount equal to up to 15% of the Offering, on the same terms and conditions, exercisable in whole or in part at any time up to 30 days following today’s closing.