The Harvard Business Review measures CEO performance by examining financial returns over each CEO's entire tenure, not just the last year, as well as each company's rating on environmental, social and governance issues.
Here are 2018's five best-performing CEOs in the world:
1. Pablo Isla, Inditex
2. Jensen Huang, Nvidia
3. Bernard Arnault, LVMH
4. Francois-Henri Pinault, Kering
5. Elmar Degenhart, Continental
Here are all healthcare CEOs included on the top 100:
9. Hisashi Ietsugu, Sysmex
15. Michael Mussallem, Edwards Lifesciences
24. Lars Rasmussen, Coloplast
42. Mark Bertolini, Aetna
43. Michael Mahoney, Boston Scientific
53 (t). Leonard Schleifer, Regeneron Pharmaceuticals
53 (t). Richard Gonzalez, Abbvie
61. Bruce Broussard, Humana
71. David Cordani, Cigna
84. Timothy Ring, CR Bard
85. Marc Casper, Thermo Fisher Scientific