What are some mind-blowing facts that sound unreal but are actually true?

 First lets see how many of the brands have you heard

1. Audi
   

1. ​
   
   
2. Skoda
   

1. ​
   
   
2. SEAT
   

1. ​
   
   
2. Lamborghini
   

1. ​
   
   
2. Bentley
   

1. ​
   
   
2. Bugatti
   

1. ​
   
2. Porsche
   

1. ​
   
2. Ducati
   

1. ​
   
   
2. MAN SE
   

1. ​
   
2. SCANIA AB
   

1. ​
   

Do you know what's common between them?
All of these are owned by the Volkswagen Group. Surprising, isn't it? See Volkswagen Group. A Single group holds the ownership of all these giants.

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Edit: Another interesting fact: Ducati is a subsidiary of Lamborghini which is a subsidiary of Audi which in turn is a subsidiary of Volkswagen Group.
Also BMW owns Rolls Royce. Maserati and Ferrari are owned by Fiat.

Edit2: Porsche SE, A German holdings company with investments in the automotive industry, has about 25% ownership of Volkswagen which holds 100% ownership of Porsche AG (the brand that manufactures automobiles) Source: Porsche Automobil Holding SE
Thanks to @Vivek Sharma for mentioning that.

Update:Ferrari is no more owned by Fiat. It moved out from FCA (Fiat Chrysler Automobiles) in the last quarter of 2015.