• Dec 1994

Cambior discovers La Arena

• Sep 2006

IAMGOLD acquires Cambior

• Dec 2007

IAMGOLD decides to sell La Arena Project to Rio Alto Mining Limited

• Jul 2008

Global Financial Crisis

• Sep 2008

Rio Alto and IAMGOLD re-negotiate agreement to acquire La Arena

• Jun 2009

MSM acquires Rio Alto and changes name to Rio Alto Mining Limited (TSXV:RIO)

• Jun 2009

IAMGOLD elects to convert US$1M option fee to shares (10.7%)

• Oct 2009

Rio Alto lists on Lima Bolsa

• Nov 2009

Kallpa Securities SAB raises C$ 6.1M from Peruvian investors (C$0.36 / share)

• Apr 2010

Secures Gold Prepayment Facility (US$ 24.25M) to fund La Arena Gold Oxide Project Development

• May 2010

Raises C$ 8.5M from Peruvian investors (C$0.75 / share)

• Jun 2010

Raises C$ 7.7M from JP Morgan Natural Resources Fund (C$0.76 / share)

• Jul 2010

La Arena Gold Oxide Project EIA approved

• Sep 2010

Updated Resource / Reserve and Financial Model

• Nov 2010

Raises C$ 20.3 M in Peru & Chile; JP Morgan participates (C$1.68 / share)

• Jan 2011

Closes C$ 57M bought deal financing  (C$2.05 / share)

• Feb 2011

 Rio Alto Mining Limited completes 100% acquisition of La Arena SA  

• May 2011

First gold production at La Arena