Petro Rio S.A. HRTPF

RELEVANT CALENDAR : HRT-PETRORIO (April and May)

[Rzbern]

30/april - AGOE - Ordinary and Extraordinary General Meeting (11: 00)

04/may - Report production of March - ANP

16/may - Expires Namibia PEL23 licenses (note: 2112B and 2212A)

13/may - Board of Directors' Meeting

14/may - Expires Namibia PEL28 licenses (Blocks: 2813A, 2814B and 2914A)

14/may - Disclosure of 1T15 (after trading hours)

15/may - Conference Call - 1T15 (11: 00h to 13: 00h)

29/may - Reference Form 2015- ref: 2014

[Rzbern]

rectification,  ITEM: "Expires Namibia PEL23" the correct datre is 06/may and not 16/may RELEVANT CALENDAR : HRT-PETRORIO (April and May)  30/april - AGOE - Ordinary and Extraordinary General Meeting (11: 00h)  04/may - Report production of March - ANP  06/may - Expires Namibia PEL23 licenses (note: 2112B and 2212A)  13/may - Board