REUTERS For decades, the business community has been keeping secrets — from its employees. From financial data and salary information to long-term initiatives and succession planning, privately owned companies have long subscribed to the theory that sharing critical information with employees is done only on a need-to-know basis. However, as a new generation of entrepreneurs takes hold, so too is a new era of transparency. The 2-year-old analytics company SumAll has created an open-book culture by giving each of its 30 employees access to mounds of company information, including such previously sacred data as individual salaries and bonuses, investor details and capital structure.