Oi-Yee is the Chief Executive Officer of Climate Impact X (CIX). She is responsible for overseeing the strategic direction of CIX, as well as developing and executing the company’s vision and mission to accelerate environmental impact at scale through the carbon markets.
Oi-Yee is a seasoned, visionary leader with a background spanning 25 years in financial markets. She brings a wealth of experience in building and leading high-performing businesses across sectors, with a proven track record in fintech, innovation and capital markets.
Oi-Yee was most recently CEO of ADDX, a blockchain-based private capital markets exchange in Singapore licensed and regulated by the Monetary Authority of Singapore. Under her leadership since 2020, ADDX strengthened its partnerships with global blue-chip companies and grew its platform to surpass US$1 billion in tokenised securities, one of the largest worldwide. Prior to ADDX, Oi-Yee spent over 20 years in investment banking, leading major capital markets transactions for clients across Asia, Europe and the US. She has held leadership roles at Citigroup, Morgan Stanley, Nomura and UBS.
Oi-Yee is passionate about leveraging technological innovation to advance financial inclusion and create meaningful impact. She graduated from Nanyang Technological University with a Bachelor of Accountancy. She also holds a Master of Business Administration from Manchester Business School.

Oi-Yee Choo
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