Billionaire Profile
Sarath Ratanavadi
Global Rank
#174

Image: MGR Online VDO | CC BY 3.0 | via Wikimedia Commons

Sarath Ratanavadi

CEO, Energy
THAILAND
Real-Time Net Worth
$16.527B
Estimated based on Energy stock value as of April 20, 2026
+0.85% (24h)
Age
60
Source
Energy, infrastructure, telecom, crypto
Industry
Finance & Investments
Citizenship
THAILAND

Biography

Sarath Ratanavadi is a prominent Thai businessman and engineer, best known as the founder and CEO of Gulf Development. With a net worth of $12.9 billion as of May 20, 2025, he is a leading figure in Thailand's energy sector. His wealth stems from Gulf Energy Development, a company he established to focus on power generation, telecommunications, and digital infrastructure. Ratanavadi's career spans over 30 years, marked by significant achievements in Thailand and Southeast Asia's infrastructure development. He is also involved in philanthropy, notably through the NIST International School Foundation in Bangkok, where he supports education and community development.

Fact Checked
Verified by Editorial Team
Live Data
Updated 4/20/2026

Wealth Over Time

In-Depth Profile

Early Life and Education

Sarath Ratanavadi was born in Bangkok on July 12, 1965. He attended Vajiravudh College and later earned a bachelor's degree in civil engineering from Chulalongkorn University. He furthered his education with a Master of Science in Engineering Management from the University of Southern California (USC).

Rise to Success

Sarath Ratanavadi founded Gulf Electric Company Limited in 1994, marking his entry into Thailand's liberalizing power sector. Over the next decade, he expanded the company, establishing various power generation and cogeneration entities. These companies were later merged to form Gulf Energy Development Company Limited in 2007. He took Gulf Energy public in 2017, which became Thailand's largest IPO in a decade. In 2021, he diversified into telecommunications by acquiring stakes in InTouch Holdings and Advanced Info Service (AIS). In 2024, Gulf Energy's joint venture with Binance launched a crypto exchange in Thailand. Recently, he led the merger between Gulf Energy Development and Intouch Holdings, creating Gulf Development, a conglomerate with interests in energy, telecommunications, and digital infrastructure.

Key Business Strategies

Sarath Ratanavadi's business strategy involves calculated diversification, focusing on infrastructure, sustainability, and digital transformation. He favors majority ownership to maintain control and ensure strategic execution. Gulf Energy's success is attributed to its expansion into clean energy, international investments, and infrastructure.

Philanthropy

Ratanavadi is involved in various charitable initiatives, with a special focus on education, health, and sports. He chairs the NIST International School Foundation in Bangkok, supporting international curricula and educational access for Thai students.

Career Milestones

1994

Founded Gulf Electric Company Limited

Established his first venture in Thailand's power sector.

2007

Gulf Energy Development Company Limited formed

Merged various power companies into a holding company.

2017

Gulf Energy Development IPO

Took the company public, raising over $733 million in Thailand's largest IPO in a decade.

2021

Diversified into Telecommunications

Acquired stakes in InTouch Holdings and Advanced Info Service (AIS).

2024

Launched Cryptocurrency Exchange

Gulf Energy's joint venture with Binance launched a crypto exchange in Thailand.

2025

Merger to form Gulf Development

Merged Gulf Energy Development and Intouch Holdings.

Philanthropy & Social Impact

Education

NIST International School Foundation

N/A

Chairs the foundation, supporting education and international curricula.

Business Philosophy & Leadership

Notable Quotes

"Innovation and strategic diversification are key to sustainable growth."

Leadership Principles

Calculated Diversification

Focus on businesses that create long-term value through infrastructure, sustainability, and digital transformation.

Majority Ownership and Control

Ensuring the ability to execute strategy with minimal interference.