T-Mobile US, Inc. (NASDAQ:TMUS) is among the high growth mega cap stocks you can buy and hold for the next 3 years. A key shareholder in T-Mobile US, Inc. (NASDAQ:TMUS), Deutsche Telekom AG, sold 136,080 shares of common stock. Under a pre-arranged 10b5-1 trading plan, the transaction resulted in proceeds of approximately $33.7 million. From strong operating cash flow growth to rising margins, T-Mobile US, Inc. (NASDAQ:TMUS) is in the right direction for new all-time highs in the near future. While slight ...