GRN Holdings Corporation Inc. announced the appointment of a new Chief Executive Officer, Donald Steinberg, who is focused on implementing a new business model based on Retail and Global Marijuana Distribution. With the appointment of Donald Steinberg as CEO and Director, the Company's former CEO, has resigned from the Company's board of directors, leaving Donald Steinberg as the Company's sole director. Don has decades of involvement in the Marijuana Industry, going back to the 70's when he was noted as the largest importer of Marijuana into the U.S. While in Marijuana “college” he studied stock options and wrote option volatility programs that he implemented on all of the option exchanges in the U.S. After that and seeing the large use of phone cards in Europe, he founded GlobalCom2000 which became a premier phone card company in the U.S. namely with the 7-11 card, the 1st card in the U.S. with a corporate logo and distribution in hundreds of 7-11 stores.

He then went on to create One World Communications, which became the largest telecom affiliate marketing company in the world with 187 offices and training centers in over 30 countries and 200,000 affiliates. After One World Communications, he created Club Vivanet to provide financial services. In 2009, he formed Medical Marijuana Inc. which was the 1st company to be on a U.S. stock market.

After building the market cap of Medical Marijuana Inc. to a market cap of nearly $100 million, he retired to Florida. In 2015, he formed Marijuana Company of America and resigned in 2019. In that year, he formed Marijuana Strategic Ventures to assist companies in the “going public process”.

He recently changed the name of that company to Mushrooms Inc. to participate in the Mushrooms industry.