Mead Johnson Nutrition Company is a global leader in pediatric nutrition with $2.8 billion in net sales for the year ended December 31, 2009. We are committed to creating trusted nutritional brands and products that help improve the health and development of infants and children around the world and provide them with the best start in life. Our Enfa family of brands, including Enfamil infant formula, is the world’s leading brand franchise in pediatric nutrition, based on retail sales. Our comprehensive product portfolio addresses a broad range of nutritional needs for infants, children and expectant and nursing mothers. We have over 100 years of innovation experience during which we have developed or improved many breakthrough or industry-defining products across each of our product categories. Our singular focus on pediatric nutrition and our implementation of a business model that integrates nutritional science with health care and consumer marketing expertise differentiate us from many of our competitors.
We market our portfolio of more than 70 products to mothers, health care professionals and retailers in more than 50 countries in Asia, North America, Latin America and Europe. Our two reportable segments are Asia/Latin America and North America/Europe, which comprised 58% and 42%, respectively, of our net sales for the year ended December 31, 2009. For the year ended December 31, 2009, 65% of our net sales were generated in countries outside of the United States.
We believe parents and health care professionals associate the Mead Johnson name and the Enfa family of brands with quality, science-based pediatric nutrition products. We believe the strength of our brands allows us to create and maintain consumer loyalty across our product portfolio and stages of pediatric development.
The two principal product categories in which we operate are infant formula and children’s nutrition, which represented 64% and 33% of our net sales for the year ended December 31, 2009, respectively.
In February 2009, we consummated an initial public offering of 34.5 million shares of our Class A common stock and Mead Johnson became an independent, separately traded, publicly-held company. At that time, BMS beneficially owned 42,344,571 shares of our Class A common stock (representing approximately 55.1% of our outstanding shares of Class A common stock) and 127,655,429 shares of our Class B common stock (representing 100% of the outstanding shares of Class B common stock).
On December 23, 2009, BMS completed an exchange offer whereby BMS converted all outstanding shares of Class B common stock to Class A common stock and then disposed its entire ownership and voting interest in us, resulting in the split-off of Mead Johnson from BMS. Effective January 7, 2010, our Class A common stock was reclassified as common stock, par value $0.01 per share. Following the split-off, we are completely independent from BMS subject to certain agreements between BMS and us that will remain in place for specified terms.
As of December 31, 2009, we employed approximately 5,600 people worldwide. Our manufacturing workforces at Zeeland, Michigan; Evansville, Indiana; Guangzhou, China; and Chonburi, Thailand are not unionized. The manufacturing workforce at Delicias, Mexico, is unionized and covered by a collective bargaining agreement, with an annual negotiation process with the union. We completed a salary renegotiation with the union in Delicias on March 31, 2009, and the contract is subject to a comprehensive renegotiation March 31, 2010. The manufacturing workforce and the non-supervised sales force at Makati, Philippines, are unionized and covered by a collective bargaining agreement, which expires on December 31, 2010. In addition, several of our workforces in Europe have works council representation. We believe our employee relations are satisfactory.