PVC: Change in Key Members

Drilling Mud Corporation announces change in the key members as follows:

- Ms. Le Thi Thu Huong has been appointed Director in place of Ms. Chu Thi Hien with effect since 05/04/2013

HNX

>   PVR: Change in Key Members (14/05/2013)

>   PNC: Personnel change (14/05/2013)

>   AGD: Personnel change (14/05/2013)

>   KDC: Personnel change (14/05/2013)

>   XuanthanhSC: Appointment of Deputy CEO (13/05/2013)

>   XuanthanhSC: Appointment of Deputy CEO (13/05/2013)

>   TBX: Change in Information Disclosure Officer (13/05/2013)

>   TET: Change in Supervisory Board (13/05/2013)

>   Mirae Asset: Personnel change (13/05/2013)

>   OSC: Personnel change (13/05/2013)