Medline is a family-owned medical supply manufacturer and distributor located in Northfield, Illinois. : A group of private equity firms including Blackstone Group is nearing a deal to purchase medical supply manufacturer and distributor Medline Industries, The Wall Street Journal reports. The sale could value Medline at more than $30 billion, people familiar with the matter told the paper. Medline Industries, of Northfield, Illinois, makes 550,000 types of medical supplies for specialty medical facilities such as surgery centers, acute care facilities, nursing facilities, hospice care centers and hospital laundries, according to the company's website.