Company events said to be happening at the same time (11)
I believe the answer is:
coincidence
'to be happening at the same time' is the definition.
'company events said' is the wordplay.
'company' becomes 'co' (abbreviation).
'events said' becomes 'incidence' (events = incidents which sounds like incidence).
'co'+'incidence'='COINCIDENCE'
(Other definitions for coincidence that I've seen before include "pure chance" , "Simultaneous or connected occurrence" , "Chance event" , "Fluke" , "Remarkable concurrence" .)