June 29 (Reuters) - Wall Street's main indexes were set to open higher on Monday as easing tensions in the Middle East lifted sentiment following days of hostilities between the U.S. and Iran, while Comcast shares soared on plans to split into two companies. .N

** GameStop Corp GME.N:
BUZZ - Rises as company seeks to pursue eBay despite rejection [nL4N4310JV ]

** Space Exploration Technologies Corp SPCX.O:
BUZZ - Gains as Musk's rocket, AI giant set to join Nasdaq-100 nL4N4310KX

** Viridian Therapeutics Inc VRDN.O:
BUZZ - Jumps after US FDA approves thyroid eye disease drug nL4N4310OR

** Comcast Corp CMCSA.O:
BUZZ - Jumps on plan to spin off NBCUniversal, Sky nL4N4310S6

** Rockwell Medical Inc RMTI.O:
BUZZ - Slips after announcing reverse stock split nL4N4310TU

** Martin Marietta Materials Inc MLM.N:
BUZZ - Falls on report of $13.5 billion merger with Lhoist North America nL4N4310V4

** Charter Communications Inc CHTR.O:
BUZZ - Jumps after report of cell phone tie-up discussion with SpaceX nL4N4310MP

** Rocket Lab Corp RKLB.O:
BUZZ - Jumps on $8 billion Iridium Communications acquisition nL6N4310P6

** FuelCell Energy Inc FCEL.O:
BUZZ - Rises after EXIM approves $49 million financing nL4N4310Y8

** Larimar Therapeutics Inc LRMR.O:
BUZZ - Tumbles as safety concerns resurface in rare disease drug study update nL4N4310YD

** Booz Allen Hamilton Corp BAH.N:
BUZZ - Rises on OpenAI partnership nL4N431103

** Gulfport Energy Corp GPOR.N:
BUZZ - Rises ahead of S&P SmallCap inclusion nL6N4310QH