The Company was found as the name of “The Goldhill Securities Company Limited” on 7 March 1975 with register no. 212/1975 and had three licenses; securities broker, securities dealer, and investment advisory.

Thai Farmers Bank Public Company Limited, Finance One Public Company Limited, and a group of major shareholders of Finance One Public Company Limited acquired Goldhill Securities Company Limited.

The Company became a member of the Stock Exchange of Thailand with broker seat no. 13

The Company changed its name to "Securities One Company Limited"

The Company became a listed company in the Stock Exchange of Thailand, known as "S-ONE"

The Company registered as a public company

The Company obtained Securities Registrar license

The Company obtained an Underwriting license

The Company made a tender offer to acquire 100% of First Asia Securities Public Company Limited. 

KGI Group became the major shareholder of the Company.

The Company obtained a Securities Borrowing and Lending license

The Company changed its name to KGI Securities One Public Company Limited.

The Company changed its name to KGI Securities (Thailand) Public Company Limited and changed securities code to "KGI"

SEC granted an approval to the Company to act as a Financial Advisor

SEC authorized the Company to act as selling agent for mutual funds

SEC granted an approval to the Company to operate an OTC derivatives business

The Company obtained a license to conduct Futures Brokerage Business

The Company started to provide a Futures Brokerage Service

The Company launched an online Internet service for futures trading

The Company was one of the first three brokers to be appointed as a market maker of the Thailand Futures Exchange Public Company Limited (TFEX)

The Company joined a group led by One Asset Management Limited (97% owned by the Company) and won the right to launch Thailand's first Equity Exchange Traded Fund (ETF)

The Company was the first and only service provider of Market Maker (MM) and Participating Dealer (PD) for ThaiDEX SET50 ETF (TDEX), Thailand's first equity exchange traded fund

The Company started to provide trading in SET50 Index Options, giving more alternatives to investors

The Company started providing OTC Equity Derivatives on foreign equity underlying covering markets; Hong Kong, Japan, Singapore, Australia, USA, and Europe.

The Company started to provide trading in Single Stock Futures, increasing the alternatives for investors

The Company moved its Head Office from United Center Building on Silom Road to Asia Centre Building on South Sathorn Road

The Company started to provide trading in Gold Futures, increasing the alternatives for investors

The Company became the first securities company in Thailand to launch Derivative Warrants (DW). In 2009, the Company sold 3 DWs i.e. PTT13CA, KBAN13CA and PTTE13CA. All 3 DWs were highly successful. The Company also acted as Market Maker (MM) of this DW

The Company joined a group led by One Asset Management Limited (97% owned by the Company) to launch ThaiDEX FTSE Set Large Cap ETF (TFTSE). The Company acts as Market Maker (MM), providing liquidity in the secondary market and as Participating Dealer (PD), facilitating the creation and redemption of TFTSE in the primary market.