Peter Gamma has not looked at it in detail. But he supposes that these are the pharmaceutical companies. In 2023, Roche has an income fo roughly CHF 4.5 billion:

https://assets.roche.com/f/176343/x/301a8dffe0/231019_ir_q3.pdf

This is reflected also in the facilities of Roche in Basel:

But still are the facilities of the Swiss Federal Institute of Technology in Zurich Hönggerberg not more impressive:

Which is an evidence that hey have a lot of money as well. But it is easier to find a job at Roche Pharma Basel than at the Swiss Federal Institute of Technology in Zurich Hönggerberg.