May 1 (Reuters) - Pioneer Natural Resources Co:

* PIONEER CEO TO BE BARRED FROM EXXON BOARD IN DEAL WITH FTC- WSJ

* US FTC IS SET TO ALLEGE AS SOON AS WEDNESDAY THAT PIONEER CEO SHEFFIELD ENGAGED IN COLLUSIVE ACTIVITY THAT COULD HAVE RAISED THE PRICE OF OIL - WSJ

* THERE IS NO ALLEGATION OF ANY WRONGDOING BY EXXON - WSJ Source text: https://tinyurl.com/575jd6fh Further company coverage: