The owners of Citigroup (NYSE:C) haven't had a smooth ride over the last decade. The New York City-based company went into the financial crisis as the biggest bank in America, with an appropriately large bottom line. But it emerged from the economic cataclysm in shambles, after writing off tens of billions of dollars' worth of toxic subprime-backed securities.

It's likely for this reason that all five of Citigroup's biggest shareholders are institutional money managers -- overseeing others' investments but not their own. For instance, Vanguard and Fidelity make the list thanks to their mutual and exchange-traded funds, which own large swaths of the stock market at any particular point in time.

To learn the other three companies that count among Citigroup's five largest shareholders, simply scroll through the brief slideshow below -- a table with raw data follows it.

Citigroup's Biggest Investors

Number of Shares Owned

Value of Stake

Ownership Interest in Citigroup

Vanguard

159.9 million

$8.9 billion

5.27%

State Street

125.8 million

$7.1 billion

4.14%

BlackRock

87.5 million

$4.9 billion

2.88%

Fidelity

82.3 million

$4.6 billion

2.71%

Invesco

44.1 million

$2.5 billion

1.45%

Data source: Morningstar, Yahoo! Finance, author's calculations.

John Maxfield has no position in any stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.