Sun Techno Overseas Ltd., formerly Wellworth Overseas Limited, is an India-based company.In 2011 the company changed its name from Wellworth Overseas Ltd. to Sun Techno Overseas Ltd.

The company is engaged in the business of trading in shares and securities, small level of stock broking and consulting works. As of March 31, 2009, the company had started trading operations and business in commodities, both in agro-based and precious metals, and other goods in present and future markets.

The company is also diversifying its business activities in the power sector, by establishing wind power generation plant.