Change of Adviser

29 February 2016

Amerisur Resources Plc

Change of Adviser

Amerisur Resources Plc ("Amerisur" or the "Company"), the oil and gas producer and explorer focused on South America, is pleased to announce the appointment of Stifel Nicolaus Europe Limited ("Stifel") as Nominated Adviser and Joint Broker to the Company with immediate effect. Investec and RBC Capital Markets remain as Joint Brokers.

ENDS

ENQUIRIES:

Notes to Editors

Amerisur Resources is an independent full-cycle oil and gas company focused on South America, with assets in Colombia and Paraguay and production of circa 4,350 BOPD. Amerisur's strategy is to acquire, explore and develop large acreage positions in major under explored basins located in South America. The Company's distinctive approach has been to own 100% of its assets at early stages in order to have full control over the fields' development. That requirement is now being relaxed as a sound production baseline has been established and in response to the widening opportunity set to which the Company has access.

In Colombia, the Company is operator and has a 100% working interest in the Platanillo block which includes the Platanillo field which is currently producing circa 4,350 BOPD. The 11,341 hectare block is located in the Putumayo Basin. The Company has a 60% working interest and operatorship in block Put-12, a 55,000 hectare block which is adjacent to Platanillo and shares its geology and a 50% working interest in Put-30 a 38,514 hectare block, approximately 55km to the north of the Company's 100% owned Platanillo field. In addition, the Company has a 30% working interest in the CPO-5 contract, located in the Llanos basin and a 49.5% working interest in the Tacacho contract, located in the Caguan-Putumayo basin. The Company has recently acquired 50% working interest in PUT-8 Block adjacent to the west of Platanillo, a 100% working interest and operatorship in the Coati Evaluation Area (Temblon Field) within the Coati Block located in the South West of the Putumayo basin and a 100% working interest and operatorship in the Andaquies Block located in the north east of the Putumayo basin.

In Paraguay, Amerisur is the largest acreage holder in the country, with 5.2 million hectares covering five 100% owned oil and gas permits in the Paraguayan part of the Chaco and Parana Basins.

John Wardle is CEO of Amerisur, having worked in Colombia since 1994, first for BP Exploration and subsequently for Emerald Energy. The Company is chaired by Giles Clarke and is listed on the AIM Market of the London Stock Exchange.