The top 10 female CEOs at S&P 500 companies

Pepsi CEO Indra Nooyi is stepping down this year, winnowing further the already small number of women running S&P 500 companies. Of the 339 CEOs that have held the top job at an S&P 500 company for at least two years, only 17 were women, about 5 per cent.

Following is a list of those who remain:

Ventas Inc.

Debra, A. Cafaro

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General Motors Co.

Mary T. Barra

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General Dynamics Corp.

Phebe N. Nivakovic

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Duke Energy Corp.

Lynn J. Good

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Lockheed Martin Corp.

Marilyn A. Hewson

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IBM Corp.

Virginia M. Rometty

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Hewlett Packard Enterprise Co.

Margaret C. Whitman

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Synchrony Financial

Margaret M. Keane

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Mylan

Heather Bresch

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Sempra Energy

Debra L. Reed

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Ross Stores Inc.

Barbara Rentler

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Advanced Micro Devices Inc.

Lisa T. Su

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KeyCorp

Beth E. Mooney

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Ulta Beauty Inc.

Mary N. Dillon

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Alliant Energy Corp.

Patricia L. Kampling

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American Water Works Co.

Susan N. Story.