
1. GSK
2017 sales: $6.96 billion (£5.16 billion)
2016 sales: $6.19 billion (£4.59 billion)
Vaccine business led by: Luc Debruyne

2. Merck & Co.
2017 sales: $6.5 billion
2016 sales: $6.2 billion
Vaccine business led by: Michael Nally

3. Sanofi
2017 sales: $6.12 billion (€5.10 billion)
2016 sales: $5.50 billion (€4.58 billion)
Vaccine business led by: David Loew

4. Pfizer
2017 sales: $6.00 billion
2016 sales: $6.07 billion
Vaccine business led by: Susan Silbermann

5. Pfizer
2017 sales: $1.0 billion
2016 sales: $753 million
Vaccine business led by: Gordon Naylor