Crown Castle adds board retirement policy after activist investor Elliott urges changes

Houston-based Crown Castle International Corp. (NYSE: CCI) will see nearly half of its board of directors turn over in the next couple of years after adding a mandatory retirement policy.

The new policy comes less than a month after activist investor Elliott Management Corp. publicly released a letter to Crown Castle’s board of directors calling for changes to the communications infrastructure giant.

Under the new policy, the board will not nominate any non-employee director who has reached 72…