Electricity Generating PCL : 25 September 2017 Shareholders' Agreement and Power Purchase Agreements of Nam Thuen 1 Hydropower Plant Project

G R O U P

No. EGCO 110/ 5'16

Date: September 25, 2017

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ELECTRICITY GENERATI NG PUBLIC COMPANY LI MITED

222 EGCO Tower, 141h-15th Fl, Moo 5 , Vibhavad1 Ranqsit Hoad, Tu119so11qhong, Laks1

Bangkok J 07.1Ll, Th;i1land

TP.l ,66 (ol 2998 5999

Fax : +66 ID] 2955 0956-9

Attn: President of the Stock Exchange of Thailand

Subject: Shareholders' Agreement and Power Purchase Agreements of Nam Thuen 1 Hydropower Plant Project

The Electricity Generating Public Company Limited ("EGCO") would like to inform the Stock Exchange of Thailand that on September 4, 2017, EGCO has entered into a Shareholders' Agreement of Nam Theun 1 Power Company Limited ("NT1PC") in order to develop the Nam Theun 1 Hydropower Plant Project, located on the Nam Kading River in Bolikhamxay, Laos PDR. NT1PC's shareholding structure consists of Phonesack Group Company Limited, EGCO, and EDL-Generation Public Company in the proportion of 60%, 25% and 15%, respectively. Additionally, on September 23, 2017, NT1PC has entered into a 514.30- MW Power Purchase Agreement with the Electricity Generating Authority of Thailand and a 130-MW Power Purchase Agreement with Electricite du Laos ("EDL"). Both Power Purchase Agreements will last

for 27 years starting from the Commercial Operation Date in 2022.

This transaction was not a connected transaction. Also, under the Stock Exchange of Thailand's requirements for notification on Acquisition and Disposal, the calculated transaction size based on total value of consideration paid is accountable for 1.78% of EGCO's reviewed and consolidated financial statements as at March 30, 2017 which less than the 15% threshold. Therefore, this transaction does not require disclosure under the rules, procedures and disclosure of the information concerning the acquisition and disposition of assets of listed companies. However, the disclosure is disseminated in the case of the investment in a joint venture company with a proportion of 10% or more of its paid up capital.

Please be informed accordingly .

Yours sincerely,

Chanin Chaonirattisai Director

Acting President

Corporate Secretary Division Tel. 0 2998 5020-25