Mirae Asset Global Investments' Canadian subsidiary Horizons ETFs saw its assets under management surpass 30 trillion won ($22.8 billion) this month, marking ninefold growth in over 10 years. Horizons ETFs has become the fourth-largest ETF operator in Canada with its AUM standing at $22.8 billion as of Jan. 10, from $2.2 billion when Mirae Asset Global Investments had acquired the unit in 2011, according to the .