2.     Stock code: SDT

3.     Securities type: Common stock

4.     Name of connected institution: Bao Viet Securities Investment Fund

5.     Name of PDMR/Director in the listed company: Mr. Dau Minh Lam

6.     Position in the listed company: Director

7.     Position of representative in  the connected institution company: Deputy General Manager

8.     Number of shares held by representative before transaction: 0 share (0%)

9.     Number of shares held by connected institution before transaction: 1,028,920 shares (4.89%)

10.  Number of shares to be disposed: 1,000,000 shares

11.  Number of shares to be acquired: 1,000,000 shares

12.  Nature of transaction: through negotiation and continuous orders matching

13.  Purpose of transaction: short-term trading

14.  Expected Start date of transaction: 01/06/2012

15.  Expected End date of transaction: 30/07/2012.