With health care companies scrambling to keep costs in check, data is more important than ever. And Charlotte-based Premier Inc. plays a key role in providing health systems with information that leads to better care and outcomes with lower expenses, president and CEO Susan DeVore says. The solutions company shares clinical and operational data and strategies culled from its membership, which includes 2,900 community hospitals, and nearly 100,000 providers, from nursing facilities to pharmacies. Now, Premier's reach can potentially grow broader because of the company's initial public offering last month.