The Power 50

Business has its ups and downs, and so, naturally, do women in business. (Bye-bye, Martha!) But the story of this list is one of achievement: The credentials of these women, including the 13 newcomers, are the strongest yet.

Judy McGrath
18. Judy McGrath
Chairman and CEO, MTV Networks
Viacom (VIA)
2006 rank:  12
Age: 55

MTV Networks delivers more than half of parent Viacom's sales. Revenues in McGrath's division rose 7% last year, to $7.2 billion, and operating income 11%. But youth culture is fickle, and MTV's buzz has lessened since her mentor, Tom Freston, was fired in 2006. McGrath has her reputation for cutting-edge creativity riding on two projects: a social networking platform, Flux, and an investment in VBS.tv, the online video offshoot of hipster magazine Vice.

Indra Nooyi

Anne Mulcahy

Meg Whitman

Angela Braly

Irene Rosenfeld

Pat Woertz

Susan Arnold

Oprah Winfrey

Andrea Jung

Brenda Barnes

Ursula Burns

Sallie Krawcheck

Ann Livermore

Christine Poon

Anne Sweeney

Zoe Cruz

Ginni Rometty

Judy McGrath

Ann Moore

Sue Decker

Susan Desmond-Hellmann

Diane Greene

Amy Brinkley

Susan Ivey

Ellen Kullman

Charlene Begley

Heidi Miller

Cece Sutton

Sheryl Sandberg

Abigail Johnson

Carol Meyrowitz

Carrie Cox

Linda Dillman

Shelly Lazarus

Mary Sammons

Lisa Weber

Claire Babrowski

Joanne Maguire

Colleen Goggins

Kathleen Murphy

Dawn Hudson

Liz Smith

Cathleen Black

Pam Nicholson

Melanie Healey

Amy Pascal

Deirdre Connelly

Jan Fields

Julia Stewart

Cathie Lesjak
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Most stock quote data provided by BATS. Market indices are shown in real time, except for the DJIA, which is delayed by two minutes. All times are ET. Disclaimer. Morningstar: © 2018 Morningstar, Inc. All Rights Reserved. Factset: FactSet Research Systems Inc. 2018. All rights reserved. Chicago Mercantile Association: Certain market data is the property of Chicago Mercantile Exchange Inc. and its licensors. All rights reserved. Dow Jones: The Dow Jones branded indices are proprietary to and are calculated, distributed and marketed by DJI Opco, a subsidiary of S&P Dow Jones Indices LLC and have been licensed for use to S&P Opco, LLC and CNN. Standard & Poor's and S&P are registered trademarks of Standard & Poor's Financial Services LLC and Dow Jones is a registered trademark of Dow Jones Trademark Holdings LLC. All content of the Dow Jones branded indices © S&P Dow Jones Indices LLC 2018 and/or its affiliates.