** Shares of medtech company TransMedics Group TMDX.O rise 1.6% to $130.79

** Piper Sandler raises TMDX's PT to $145 from $125

** Piper believes TMDX is on track to beat sales estimates for Q2, which could continue stock's strong momentum seen in recent months

** While there was a slight decline in plane volumes in May compared to April, brokerage believes TMDX continues to see strong adoption of its aviation services

** TMDX still appears positioned to deliver sequential quarterly growth in its logistics business given May flight volumes were higher than each month in Q1 - Piper

** TMDX up 106.5% YTD, as of last close

(Reporting by Juby Babu in Mexico City)

((Juby.Babu@thomsonreuters.com;))