9. Ana Patricia Botín: Chair, Santander Group, Banco Santander, Spain

Ana Patricia Botín
Juan Manuel Serrano Arce

8. Christine Lagarde: Managing Director, International Monetary Fund, US

christine lagarde managing director international monetary fund us
Adam Berry/Getty Images

7. Abigail Johnson: CEO, Fidelity Investments, US

Abigail Johnson
Brian Snyder/Reuters

6. Susan Wojcicki: CEO, YouTube, US

Susan Wojcicki
Steve Jennings/Getty Images for TechCrunch

5. Mary Barra: CEO, General Motors, US

mary barra
Jamie McCarthy/Getty

4. Sheryl Sandberg: COO, Facebook, US

sheryl sandberg
Jonathan Leibson/Getty Images

3. Melinda Gates: Co-Chair, Bill & Melinda Gates Foundation, US

Melinda Gates
Jamie McCarthy/Getty Images for Bill & Melinda Gates Foundation

2. Theresa May: Prime Minister, UK

Theresa May
LONDON, ENGLAND - JUNE 09, 2017: Prime Minister Theresa May speaks outside 10 Downing Street after returning from Buckingham Palace on June 9, 2017 in London, England. After a snap election was called by Prime Minister Theresa May the United Kingdom went to the polls yesterday. The closely fought election has failed to return a clear overall majority winner and a hung parliament has been declared.
Photo by Leon Neal/Getty Images

1. Angela Merkel: Chancellor, Germany

Angela Merkel
AP/Jens Meyer