Albemarle Corporation was incorporated in Virginia in 1993. Our principal executive offices are located at 4250 Congress Street, Suite 900, Charlotte, North Carolina 28209. Unless the context otherwise indicates, the terms "Albemarle," "we," "us," "our" or "the Company" mean Albemarle Corporation and its consolidated subsidiaries.
We are a leading global developer, manufacturer and marketer of highly-engineered specialty chemicals that are designed to meet our customers' needs across a diverse range of end markets. The end markets we serve include energy storage, petroleum refining, consumer electronics, construction, automotive, lubricants, pharmaceuticals, crop protection and custom chemistry services. We believe that our commercial and geographic diversity, technical expertise, innovative capability, flexible, low-cost global manufacturing base, experienced management team and strategic focus on our core base technologies will enable us to maintain leading market positions in those areas of the specialty chemicals industry in which we operate.
We and our joint ventures currently operate 29 production and research and development ("R&D") facilities, as well as a number of administrative and sales offices, around the world. As of December 31, 2018, we served approximately 2,300 customers, none of which individually represents more than 10% of net sales of the Company, in approximately 100 countries. For information regarding our unconsolidated joint ventures see Note 10, "Investments," to our consolidated financial statements included in Part II, Item 8 of this report.