Source: United Parcel Service 

United Parcel Service (NYSE:UPS) may seem too big and brown to fail, but that's simply not true. Even big companies can have big risks. With $35 billion in assets, 435,000 employees, and operations in 220 countries and territories, UPS has a lot to manage.

In every annual 10-K SEC filing, corporations have to list their biggest risks. Here are five of the biggest risks UPS thinks it (and its shareholders) has to handle.

Justin Loiseau owns shares of United Parcel Service and too many cardboard boxes. The Motley Fool recommends FedEx, Twitter, and United Parcel Service. The Motley Fool owns shares of Twitter. 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.