Nearly half of the US’ fastest-growing companies suffered a recent breach in information security, according to a survey released Monday by consulting giant PricewaterhouseCoopers.The poll of CEOs from over 400 firms — companies with revenues ranging from $5 million to $150 million which Pricewaterhouse dubs ‘trendsetters’ and tracks on an ongoing basis — uncovered a disturbing trend: smaller organizations haven’t responded to such breaches, and the ensuing losses, by beefing up their security budgets.