Apple CEO Tim Cook, left, Japan Post Holdings CEO Taizo Nishimuro, and IBM CEO Ginni Rometty announce a first-of-its-kind initiative to address the economic and societal issues of the aging population in Japan on April 30, 2015. Image credit: IBM.

Given that IBM (IBM 1.38%) has caught the eye of the world's most successful investor, Warren Buffett, it should come as little surprise that the storied technology firm hasn't escaped the attention of other leading investors and money managers as well. IBM's top five institutional shareholders own $31 billion worth of its outstanding common stock, equating to an ownership interest of 23.4%.

Who are IBM's five biggest shareholders? You can find the answer to this question in the brief slideshow below.

Slideshow data sourced from Yahoo! Finance and on Dec. 10, 2015. Slideshow image credit: IBM.