Lee is chairman of Temasek International and concurrently executive director of parent company Temasek Holdings, Singtel’s largest shareholder.
Prior to joining Temasek in 2012, Lee was President and CEO of both ST Telemedia Pte Ltd and STT Communications Ltd.
Shares of Singtel closed at $2.48 on Thursday, down 2 cents or 0.8% lower than its last close of $2.50.