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IBM CEOs over the century; first and only woman is leaving

FILE - In this Wednesday, Sept. 26, 2018 file photo, Ginni Rometty, Chairman, President, and CEO of IBM, speaks at the Bloomberg Global Business Forum in New York. Ginni Rometty is stepping down after nearly 40 years with the computing giant and eight years at its helm. The company said Thursday, Jan. 30, 2020 that Arvind Krishna will take over as CEO starting April 6 . (AP Photo/Mark Lennihan, File)
FILE - In this Wednesday, Sept. 26, 2018 file photo, Ginni Rometty, Chairman, President, and CEO of IBM, speaks at the Bloomberg Global Business Forum in New York. Ginni Rometty is stepping down after nearly 40 years with the computing giant and eight years at its helm. The company said Thursday, Jan. 30, 2020 that Arvind Krishna will take over as CEO starting April 6 . (AP Photo/Mark Lennihan, File) (Copyright 2018 The Associated Press. All rights reserved.)

IBM has had just one female CEO in its century-long history.

Ginni Rometty took over the helm in January 2012. IBM announced Thursday that she's stepping down in April.

Here's the list of CEOs at IBM:

Thomas J. Watson, May 1914-May 1956

Thomas J. Watson, Jr., May 1956-June 1971

T. Vincent Learson, June 1971-January 1973

Frank T. Cary, January 1973-January 1981

John Opel, January 1981-January 1985

John F. Akers, February 1985-April 1993

Louis V. Gerstner, Jr., April 1993-March 2002

Samuel J. Palmisano, March 2002-December 2011

Virginia "Ginni" Rometty, January 2012-April 2020

Arvind Krishna, starting April 6.