TransMedics Group, Inc. (TMDX) shares are up 3.50% to $78.70 as of 10:44 am on Monday, compared to its previous close of $76.04 on November 22nd. The stock's rise comes amid a broader positive sentiment in the artificial organs market, which is projected to grow significantly over the coming years. According to a report released on November 25th, the artificial organs market is expected to reach a value of USD 86.46 billion by 2031, driven by advancements in medical technologies and a high demand for organ transplants. This optimistic market outlook may be contributing to the upward movement in TransMedics' stock, as the company is a key player in the artificial organs industry.