The HMMJ price increased each day for its first four days on the market. Marijuana bioengineering The Toronto-based Horizons is the first ETF manager to offer investors Medical marijuana direct exposure to medical marijuana stocks in North America. These include companies that are working on bioengineering and production of marijuana. The ETF includes 16 companies as of March. The biggest percentage 10 percent is held in each of the following companies: Scotts Miracle-Gro Company Aurora Cannabis Inc. Aphria Inc. At Horizons, we take pride in our innovation, so we’re very happy that for the first time, investors will be able to access a low-cost, diversified portfolio of companies that are directly involved in the rapidly growing medical marijuana industry, said Hawkins. The Horizons ETF has accumulated $28.7 million in assets, according to Market Watch . More to come. The Horizons ETF is focused solely on medical marijuana and does not include companies that engage in the legal recreational marijuana industry.