Gold hit a six-year high this month as central banks ease policies.
Holdings rose 101.9 tons, bringing total known assets to 2,453.4 tons as of Friday, according to Bloomberg.
Gold has been one of the chief beneficiaries of the turmoil in global financial markets as Washington and Beijing spar over trade.
Gold has surged as investors seek protection from slowing global growth, the incessant trade war, and turmoil in the bond market
Positive drivers include weak macroeconomic data, sinking Treasury yields and expectations for fresh easing from the U.S. Federal Reserve.
As concerns about the global economy grow, so do the prices of precious metals.
Gold climbed over $1,439 on Monday, its highest level since April 2013.
The rally in gold is picking up fresh fuel from investors.
As palladium prices continue to post new record highs, some analysts worry the metal is in a bubble.
BlackRock has been raising bullion holdings since the third quarter through exchange-traded funds.