, www.getabecboiler.com No. GTB007/ 2018 December 26, 2018 Re: Report on Connected Transactions in Respect of Office Building Lease Attn: President of the Stock Exchange of Thailand Getabec Public Company Limited (the

E280218 Our Ref: TL001/18 February 28, 2018 The Stock Exchange of Thailand 93, The Stock Exchange of Thailand Building Ratchadapisek Road, Dindaeng Bangkok 10400 Attention: The President Dear Sir

Our Ref: TL015/02 Our Ref: TL011/18 May 14, 2018 The Stock Exchange of Thailand 93, The Stock Exchange of Thailand Building Ratchadapisek Road, Dindaeng Bangkok 10400 Attention: The President Dear

Our Ref: TL015/02 Our Ref: TL012/18 August 14, 2018 The Stock Exchange of Thailand 93, The Stock Exchange of Thailand Building Ratchadapisek Road, Dindaeng Bangkok 10400 Attention: The President Dear

Our Ref: TL015/02 Our Ref: TL014/18 November 13, 2018 The Stock Exchange of Thailand 93, The Stock Exchange of Thailand Building Ratchadapisek Road, Dindaeng Bangkok 10400 Attention: The President

E141117 Our Ref: TL034/17 November 14, 2017 The Stock Exchange of Thailand 93, The Stock Exchange of Thailand Building Ratchadapisek Road, Dindaeng, Bangkok 10400 Attention: The President Dear Sir

. 02-229-2355 โทรสาร 02-654-5034 อเีมล ์info@saa-thai.org www.saa-thai.org Securities Analysts Association The Stock Exchange of Thailand Building, 62, 11/Fl. Room 1105 Ratchadaphisek Rd.] Klongtoey

ที่ กตพ Ref. DBP. 080 / 2018 May 31, 2018 Subject : Connected Transaction in Respect of Office Lease Agreement Extension To : President The Stock Exchange of Thailand Diamond Building Products Public

Ref. DBP. 066 / 2020 May 11, 2020 Subject : Clarification on Operating Results for the 1st Quarter ending March 31, 2020 To : President The Stock Exchange of Thailand Diamond Building Products Public

ที่ กตพ Ref. DBP. 030 / 2019 February 20, 2019 Subject : Clarification on Operating Results of Year 2018 To : President The Stock Exchange of Thailand Diamond Building Products Public Company Limited