You can make your own.
Just take a word related to what the fictional company does and attach "-dyne" to the end. You automatically have a company name that sounds modern and on the bleeding edge of their industry. We see this is existing fiction already with names like Cyberdyne and Yoyodyne. You don't even need to ask what they do, the name tells you they are the leaders in their field.
Have a high-tech pizza company? "Pizzadyne". Automobile manufacturing? "Autodyne". Use a company name like "Aardvarkdyne", now they sound like they could use the help of some imaginative students in class. You can have fun with it.
Alternatively, you can also take a name and add "-corp" to the end. It sounds like a big corporation. Existing fiction gives use names like MomCorp from Futurama, the giant corporation run by Mom, or Oscorp from Spirderman, the business venture run by Norman Osborn. Why not give your students your own company? Let them work with "JimCorp". Again, you can have fun with this.
The names sound fictional, but at the same time you know exactly what they are.
