NIS: Network Infranstructure Services JSC bought 209,900 shares

Network Infranstructure Services Joint Stock Company (HNX: NIS) announces the trading result of principal shareholder as follows:

- Name of issuer: Network Infranstructure Services Joint Stock Company

- Stock code: NIS

- Name of principal shareholder: Network Infranstructure Services Joint Stock Company

- Securities type: Common stock

- Number of shares held by the principal shareholder before transaction: 391,200 shares (13% of

harter capital)

- Number of shares registered for acquisition: 350,000 shares

- Number of shares registered for sale: 150,000 shares

- Number of shares acquired: 209,900 shares

- Number of shares disposed: 0 share

- Total holding and total percentage holding following transaction: 601,100 shares (20.04% of Charter Capital)

- Date of transaction: From 11/02/2011 to 09/4/2011.

hnx

>   WSS: Result of transaction of connected person (Ms. Trang) (25/04/2011)

>   DC2: Director registered to buy and sell 30,000 shares (25/04/2011)

>   DC2: Director bought 6,700 shares (25/04/2011)

>   WSS: Result of transactions of Directors, PDMR. (Ms. Khanh) (25/04/2011)

>   WSS: Member of Supervisory Board registered to sell 20,000 shares (25/04/2011)

>   VTC: Director registered to buy 10,000 shares (25/04/2011)

>   DCS: Result of transaction of principal shareholder (25/04/2011)

>   DC2: Deputy Manager sold 10,000 shares (25/04/2011)

>   WSS: Ms. Trang registered to sell 10,000 shares (25/04/2011)

>   RHC: Ms. Kim Thuy registered to buy 10,000 shares (25/04/2011)