The most recent transaction, as disclosed by the company via SGX, was for 27,900 shares on March 15.
On all days, Quek paid $1.43 each for these shares.
He now holds a deemed stake of 850.36 million shares, equivalent to 71.86% of the company.
On March 17, GuocoLandannounced that 400 units or 75% of the 533 units at Lentor Mansion, were sold over the two days from March 15-16, including nearly 100 units taken up at the VIP launch on Friday, March 15.
Jointly developed by GuocoLand and Hong Leong Holdings, Lentor Mansion has a mix of two- to five-bedroom units across three 16-storey towers and three eight-storey towers.
Prices of units sold ranged from $1.149 million for a 527 sq ft two-bedder to $3.512 million for a 1,507 sq ft five-bedder.
Besides property development, GuocoLand in recent years has built up a sizeable portfolio of investment properties, boosting its recurring income stream.
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As at Dec 31, Guocoland's net asset value was $3.83.
In contrast, Guocoland shares closed at $1.44 on March 18, up 0.7% for the day but down 2.04% year to date.